JPH10300200A - Method for automatically filling bath with hot water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a large quantity of hot water from overflowing a bath when filling water automatically by obtaining the minimum quantity of water where reheating circulation is allowed from a state without any remaining water, by using the quantity as the minimum reference quantity of remaining water of the quantity of operation remaining water, and by calculating required quantity to be added when making the trial run of the bath. SOLUTION: When the automatic hot-water-filling operation of a bath is started, a controller 50 commands that each part of a device should supply, for example, 10 l, hot water from a bath hot-water-supply pipe 25 into the bath. After 10 l hot water is supplied, a circulation pump 43 is driven and a water current sensor 45 detects whether water in the bath is circulated to a reheating circulation path 40 or not. When the water is not circulated, it is commanded that quantity where 10 l hot water being supplied previously is subtracted from the preset quantity of water should be supplied to a bath 30 as the required quantity of water to be added. On the other hand, when the water in the bath is circulated, reheating is allowed. Therefore, reheating is started once. Then, the quantity of remaining water in the bath 30 is calculated after reheating and hot water is additionally supplied corresponding to the quantity of operation remaining water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bath automatic hot water filling method.

[0002]

2. Description of the Related Art An automatic bath filling method has been provided in which hot water is automatically filled in a bathtub until a predetermined amount of hot water or the like is reached. In this conventional automatic hot water filling method, if there is an amount of residual water that can be refired and circulated in the bathtub, reheating is performed once, and the total reheating heat amount, the rising temperature, the time, and the time added. The remaining water amount is calculated from the calculated remaining water amount from the set water amount to calculate the additional required amount, and the additional required amount is poured to automatically fill up to a predetermined set water amount. I was

[0003]

However, in the above-mentioned conventional bath automatic hot water filling method, the amount of residual water is reduced due to various conditions such as the mounting position of the circulating bracket of the bathtub, the shape of the bathtub, and the presence of a person bathing. In the reheating heating for calculation,
For example, there is a problem that bathtub water is not uniformly heated, for example, a short cycle occurs near a circulation fitting. For this reason, a phenomenon in which the predetermined temperature rises in a shorter time than the actual time occurs, and the residual water amount calculated from the total reheating heat amount, the rising temperature, and the time added at that time becomes considerably smaller than the actual residual water amount. There was a problem. As a result, the calculated additional required amount becomes considerably larger than the actual required additional amount, and there is a problem that the hot water overflows from the bathtub when the automatic hot water filling is performed.

Therefore, the present invention solves the above-mentioned problems in the conventional bath automatic hot water filling method, and at least prevents the calculated additional required amount from exceeding the actual additional required amount. It is an object of the present invention to provide a bath automatic hot water filling method capable of preventing at least a large amount of hot water from overflowing from a bathtub even when hot water is filled.

[0005]

Means for Solving the Problems To achieve the above object, the bath automatic hot water filling method of the present invention is to reheat and heat once the amount of residual water in the bathtub that can be reheated and circulated is provided. The remaining water amount is calculated from the total reheating heat amount, the temperature rise, and the time added at that time, and the additional required amount is calculated by subtracting the calculated remaining water amount from the set water amount, and pouring the additional required amount. In the bath automatic hot water filling method in which the hot water is automatically filled up to a predetermined set water amount, a minimum amount of water from the state where there is no residual water until the reheating circulation can be obtained during a bath trial operation, This is used as the minimum reference remaining water amount of the calculated remaining water amount, and the additional required amount is calculated.

According to the above-mentioned feature of the present invention, when the bath is automatically filled with hot water, and when there is an amount of residual water capable of reheating and circulating in the bathtub, the reheating is once performed. The amount of residual water in the bathtub is calculated from the total reheating heat, the temperature rise, and the time. And the calculated residual water amount is
If the value is equal to or more than the minimum reference remaining water amount, an additional required amount is calculated using the calculated remaining water amount, and the calculated additional required amount is poured. On the other hand, if the calculated residual water amount is smaller than the minimum reference residual water amount, the minimum reference residual water amount is adopted, the additional required amount is calculated using this minimum reference residual water amount, and the calculated additional required water amount is calculated. Hot water. According to the characteristics of the present invention, in the reheating heating for calculating the residual water amount, the bathtub water is not uniformly heated for some reason, and as a result, the calculated residual water amount becomes a considerably small value, which is less than the minimum reference residual water amount. Even in such a case, the minimum reference residual water amount is adopted in that case, and the additional required amount is calculated. Therefore, at the time of automatic hot water filling, a disadvantage that at least a large amount of hot water overflows from the bathtub is reliably prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram of a bath apparatus using the automatic bath filling method of the present invention, FIG. 2 is a control flowchart of an automatic bath filling operation, and FIG. is there.

In FIG. 1, reference numeral 10 denotes a heat exchange can, which is provided with a heat exchanger 11 for hot water supply and a heat exchanger 12 for reheating the bath.
A burner 13 that heats the heat exchangers 11 and 12, a blower
14 are provided.

A water inlet pipe 21 is provided for the heat exchanger 11 for hot water supply.
The hot water is supplied from the hot water supply heat exchanger 11 to the tapping pipe 22. A bypass pipe 23 is connected to the hot water supply pipe 22 from the water supply pipe 21, and branches downstream into a general hot water supply pipe 24 and a bath hot water supply pipe 25. In the middle of the bath water supply pipe 25, a pouring amount sensor 26 is provided. 27 is a hot water supply temperature sensor.

[0010] Between the bath reheating heat exchanger 11 and the bathtub 30, a reheating circuit 40 comprising a bath outflow pipe 41 and a bath return pipe 42 is provided. A circulation fitting 31 is provided at the lower part of the side wall of the bathtub 30, and water in the bathtub passes through the circulation fitting 31, enters the bath return pipe 42, and is further led to the heat exchanger 12 for reheating the bath to exchange heat. It is heated and returns from the circulation fitting 31 to the bathtub 30 through the bath pipe 41. This allows bathtub 30
The water is reheated and heated. Further, the bath water supply pipe 25 is connected to the bath return pipe 42 so as to be connected to the reheating circuit 40, and if necessary, both the transfer of the bath outflow pipe 41 and the bath return pipe 42, or any one of the transports The bathtub 30 can be filled with hot water. 43 is a circulation pump,
44 is a bath temperature sensor and 45 is a water flow sensor.

The controller 50 controls an automatic bath filling operation to be described later and, of course, controls the entire bath apparatus. The controller 50 receives commands and other signals from the remote controller 60 and is provided in each section of the apparatus. An information signal from the sensor is input, a predetermined operation is commanded to each unit of the apparatus, and a display signal and the like are output to the remote controller 60.

Referring to FIG. 2, an example of control by the controller 50 for the automatic bath filling operation will be described. Now, for example, when a switch (not shown) in the remote controller 60 is turned on, the bath automatic hot water filling operation is started, and the controller 50 first pours 10 liters from the bath water supply pipe 25 into the bathtub. Command each part of the device (Step S
1). After 10 liters are poured, the controller 50 makes a circulation determination (step S2). The circulation determination is a determination operation in which the circulation pump 43 is driven and the water flow sensor 45 detects whether or not bathtub water circulates in the reheating circuit 40. If the result of the circulation determination is NO (NO in step S2), it can be determined that the bathtub 30 has only the remaining water amount equal to or less than the circulation fitting 31. Therefore, in this case, the controller 50 instructs the bathtub 30 to be poured with an additional required amount obtained by subtracting the previously poured 10 liters from the set water amount (step S3). In the above description, the amount of water to be poured in step S1 does not necessarily need to be 10 liters, and may be such that the other bathtub water level does not rise so much.

In step S2, if the circulation determination is YES (YES in step S2), it is determined that the amount of residual water in the bathtub 30 is at a level higher than the circulating metal fittings 31 and is an amount capable of reheating and circulating. I can judge. In this case, the controller 50 once starts reheating (step S5). This reheating is performed until the temperature of the bathtub becomes lower by 0.5 ° C. than the set temperature of the bath, and ends (steps S6 and S7). The additional heating is not necessarily performed until the bath temperature reaches a temperature close to the bath set temperature, and as described later, as a means for calculating the amount of residual water in the bath 30, an appropriate constant It may be performed until the temperature rises.

Next, when the reheating is completed, the controller 50 calculates the remaining water amount Q in the bathtub 30 (step S8). The calculation can be simply expressed by the following equation 1, for example, from the added total reheating heat amount C and the temperature increase ΔT.

Q = C ÷ ΔT (1)

Then, the controller 50 compares the remaining water amount Q obtained by the calculation with a minimum reference remaining water amount Q _MIN described later (step S9), and when the calculated remaining water amount Q is equal to or more than the minimum reference remaining water amount Q _MIN (step S9). If the calculated remaining water amount Q is smaller than the minimum reference remaining water amount _QMIN (No in step S9), the calculated remaining water amount Q is set to the minimum reference remaining water amount _QMIN. (Step S
Ten). Next, the controller 50 determines whether or not additional pouring is necessary for the calculated remaining water amount Q (including the calculated remaining water amount Q _simulated as the minimum reference remaining water amount QMIN) (step S11). This determination is performed by comparing the calculation residual water Q and setting water Q _S. The calculated remaining water amount Q is equal to the set water amount Q
If it is equal to or more than _S (No in step S11), the filling operation is terminated without additional pouring (step S4).

On the other hand, if additional pouring is required in step S11 (Yes in step S11), the controller 50
And it calculates the additional necessary amount Q _A, to perform the pouring (step S12). Calculation of the additional required amount Q _A is performed by the following equation 2.

[0018] Additional required amount Q _A = set water amount Q _S -calculated remaining water amount Q: Equation 2

[0019] However, in Equation 2, when arithmetic residual water Q is smaller than the minimum reference residual water Q _MIN uses the minimum reference residual water Q _MIN as the operation amount of residual water Q, performs calculation of Expression 2 , calculates the additional necessary amount Q _a.

[0020] When the pouring of the operation has been added the required amount Q _A is finished, to end the hot water filling operation (step S4).

The minimum reference residual water amount Q _MIN refers to the minimum residual water amount at which the bathtub water can be reheated and circulated, and is the residual water amount in the bathtub 30 at a level slightly higher than the circulating bracket 31. The minimum reference remaining water amount Q _MIN is stored in advance in a microcomputer or the like built in the controller 50 and used in steps S9, S10, and S12 as described above.
The minimum standard remaining water amount Q _MIN is determined in advance by experiment
It can be obtained in a form suitable for 30 models and can be stored.However, at the time of bath test operation such as when installing a bathtub, the minimum reference residual water amount _QMIN is automatically calculated and stored. Is also good.

Referring to FIG. 3, an example of control by the controller 50 in the case where the minimum reference remaining water amount Q _MIN is calculated at the time of bath trial operation will be described. Now, when the operator of the bath trial operation starts the bath trial operation by turning on a switch such as a remote controller, the controller 50 first instructs to inject 10 liters into the bathtub 30 (step S21). When 10 liters are injected, the controller 50 makes a circulation determination (step S22). The circulation judgment is made by the circulation pump 43
Is driven to determine whether or not bath water circulates in the reheating circuit 40. In the circulation determination, if the bathtub water circulates, the circulation determination becomes YES.
Since the water level is higher than the circulating metal fitting 31 and the test operation cannot be performed normally, the bath test operation is terminated along with the operation of displaying the effect (step S23).

In the first circulation determination (step S22), if the bathtub water does not circulate (NO in step S22), the controller 50 injects another 60 liters (step S24), and performs the second circulation determination. Perform (Step S2
Five). If the bathtub water circulates in the second circulation determination (Yes in step S25), an additional 10 liters of water are injected (step S26), and a third circulation determination is performed (step S28). If the result of the second circulation determination is no (No in step S25), it can be determined that the water level is not yet at a level where the bathtub water can be circulated, so that a further 20 liters are injected (step S27) and the circulation determination (step S27) Steps S25 and S27 are repeated until S25) becomes yes.

If the second circulation judgment is YES (YES in step S25), it can be judged that the bathtub water has reached the circulation fitting 31 and circulation is possible, so that a further 10 liters of water are injected (step S25). S26) It is confirmed in the third circulation determination (step S28). In this case, if the circulation determination is NO (NO in step S28), the process returns to step S27, step S25, and step S26 again. If the result of the third circulation determination (step S28) is YES, the provisional reheating operation of the bath is started (step S2).
9). This provisional reheating operation is based on the minimum standard remaining water amount Q _MIN
Refire as a means for calculating.

In the above, the water injection and the circulation judgment are repeated a plurality of times because the minimum amount of water that can be circulated, which is a water level slightly higher than the circulation fitting 31, is injected into the bathtub 30. _Is calculated as the minimum reference water amount Q _MIN and stored. Therefore, step S21, step S
24, 10 liters, 60 liters, 20 in step S27
Each liter of water does not necessarily have to be that amount, but other suitable amounts of water can be employed. Further, since the water amount in step S26 has a meaning for confirming that the water level has become equal to or higher than the water level at which the circulation can be determined, it is preferable that an excessively large water amount further increases the water level. No, but not necessarily 10 liters. Similarly, circulation determination (steps S22, S25, S28)
The number of times is not particularly limited to three, except that the number of times is plural.

The provisional reheating operation is started (step S
29), and then the controller 50, the bath temperature sensor 44 to rise to the provisional set temperature T ₁ of the bath 30 temperature is predetermined
Monitored by temperature information from (step S30), if the provisional set temperature above T ₁ (YES at step S30), and ends the provisional reheating operation (step S31). controller
50 is the minimum standard remaining water Q when the provisional reheating operation is completed.
_MIN is calculated (step S32). Also, the bath output is determined.

The calculation of the minimum reference residual water amount Q _MIN (liter) is based on the heat amount C ₀ (Kcal / min) added per unit time.
And the provisional reheating time Δh (minutes) and the temperature rise of the bathtub water Δ
T (° C.) and can be calculated by the following equation 3.

Q _MIN = C ₀ × Δh ÷ ΔT (3)

[0029] When the remaining amount of water as the minimum standard residual water Q _MIN is computed, the controller 50 calculates the additional necessary amount Q _A, to pouring the additional necessary amount Q _A (step S3
3). Calculating additional required amount Q _A can be carried out by the following equation 4.

Additional required amount Q _A = set water amount Q _S -minimum reference residual water amount Q _MIN

The controller 50 then adds the necessary amount Q _A is poured to start the bath reheating operation (step S3
Four). When the bath temperature is set temperature T ₂ or more (in a step S35 YES), it terminates the bath reheating operation (step S36). Thereafter, the controller 50 stores the calculated minimum reference remaining water amount Q _MIN in a microcomputer or the like of the controller 50, and ends the bath trial run (step S38). The minimum reference remaining water amount Q _MIN is used as described above in the subsequent daily automatic bath filling operation as a water amount corresponding to the lowest bathtub water level at which reheating circulation is possible.

The tentative set temperature T ₁ can be set in advance to an appropriate temperature equal to or lower than the set temperature T ₂ .

[0033]

According to the present invention, there is provided the above construction.
According to the bath automatic hot water filling method described in (1), if there is an amount of residual water that can be reheated and circulated in the bathtub, the remaining amount of heat in the Calculate the required amount of water to calculate the additional required amount, and in the bath automatic hot water filling method in which hot water is poured, determine the minimum amount of water from when there is no residual water to when reheating circulation becomes possible during bath trial operation. This is used as the minimum reference remaining water amount of the calculated remaining water amount, and the additional necessary amount is calculated, so that during a normal bath automatic hot water filling operation, a provisional amount for calculating the remaining water amount in the bathtub is calculated. Even if the bath tub water is not heated evenly in typical reheating, as a result, the calculated residual water amount may be a very low value, in that case, it is calculated and stored in advance in the trial run. The minimum reference remaining water amount And, since the additional required amount is calculated, it is possible to prevent that the additional required amount is calculated much more than the actual amount at the time of automatic filling, and that a large amount of hot water is supplied at the time of filling. The inconvenience of overflowing from the bathtub can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a bath apparatus using a bath automatic hot water filling method of the present invention.

FIG. 2 is a control flowchart of an automatic bath filling operation.

FIG. 3 is an operation control flowchart during a test operation.

[Explanation of symbols]

 10 Heat exchanger body 11 Heat exchanger for hot water supply 12 Heat exchanger for hot water for bath heating 21 Inlet pipe 22 Outgoing pipe 25 Hot water pipe 30 Bath tub 31 Circulation fitting 40 Reheating circuit 43 Circulation pump 44 Bath temperature sensor 45 Water flow sensor 50 Controller 60 Remote control

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazutoshi Matsuda 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref.

Claims (1)

[Claims] When there is residual water in the bathtub in an amount that can be recirculated and recirculated, reheating is performed once, and the residual water amount is calculated from the total reheated heat amount, the rise temperature, and the time. Then, the required amount of additional water is calculated by subtracting the calculated remaining water amount from the set water amount, and the additional necessary amount is poured to automatically fill the water to a predetermined set water amount. In the method, at the time of bath test operation, a minimum water amount from a state where there is no residual water until reheating and circulation is possible is obtained, and this is used as a minimum reference residual water amount of the calculated residual water amount to calculate the additional required amount. Automatic bath filling method characterized by doing so.