JPH05164404A - Device to fill hot water into bath tub - Google Patents

Abstract

PURPOSE:To provide a device to fill hot water into a bath tub which allows to shorten the time required for the filling by providing a detect. or to detect the flow rate and temperature of the supplied hot water, setting device for the volume and temperature of the filled hot water, filled hot water temperature sensor, calculator and deviation memory of the calorific values of supplied hot water and filled hot water. CONSTITUTION:A supplied hot water flow rate detector 36 for the flow rate (q) of the supplied hot water to a bath tub 20 and supplied hot water temperature sensor 33 for the supplied hot water temperature Tq, filled hot water volume setting device 25 for the bath tub 20 and filled hot water temperature setting device 26 for the filled hot water set temperature Ts, filled hot water temperature sensor 40 for the water halling temperature TB for stirred bath tub hot water, supplied hot water calorific value calculator 45 that calculates the calorific value of the supplied hot water filling the bath tub 20 by the formula, P=TqXintegral qdt are provided. And from the calorific value F of the filled hot water of the bath tub 20 by a formula F=TBXintegral qdt and a target calorific value FS of the filled hot water of the bath tub 20 by a formula FS=TSXintegral qdt a temperature deviation DELTAT is calculated by a filled hot water calorific value calculator 46 according to a formula, FS-F=(TS-TB)Xintegral qdt=DELTATintegral qdt, and when this temperature deviation DELTAT is put to memory and supplied hot water calorific value P is calculated, the deviation memory 47 instructs to use the temperature TS+DELTAT in place of the supplied hot water temperature Tq.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub filling apparatus for automatically controlling the operation of filling a bathtub with hot water.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a bathtub filling apparatus of this type has a pump 2 for circulating the water in the bathtub 1, an additional heating heat exchanger 3 for heating the bathwater, and a bathwater. A hot water temperature detector 4 for detecting the temperature is provided in a reheating circuit 5 connected to the bath 1.

A water heater 7 is connected to the reheating circuit 5 at a confluence point 6. The water heater 7 includes a hot water heat exchanger 8 for heating the hot water, an opening / closing valve 9, a hot water temperature detector 10 on the hot water supply side of the hot water heat exchanger 8, and a hot water flow rate detector 11 and a hot water temperature detector on the hot water supply side. 12 are provided.

Further, the control device 13 and the above-mentioned parts are electrically connected as indicated by a broken line. The control device 1 also includes an operation switch 14 for automatically filling the bathtub 1, a temperature setting switch 15 for setting the filling temperature T _S , and a filling amount setting switch 16.
3 is similarly connected.

When the operation switch 14 is turned on, the control device 13 receiving this operation signal opens the open / close valve 9 to supply hot water from the water heater 7 to the bathtub 1 via the reheating circuit 5.

As shown in FIG. 4, the hot water supply temperature T _q is corrected by a correction temperature ΔT corresponding to the incoming water temperature T _W detected by the water supply temperature detector 12. The incoming water temperature T _W changes in association with the air temperature, and the lower the air temperature, the larger the temperature difference between the hot water supply temperature T _S and the air temperature, and the heat dissipation loss of the hot water supply increases in proportion to this temperature difference.

In other words, the amount of heat supplied from the hot water supplied by the hot water supply device 7 when it leaves the hot water supply heat exchanger 8 is deprived of heat when passing through the reheating circuit 5, and the bathtub 1 is being filled with hot water. Also, heat is taken away by touching the wall surface of the bathtub 1 or the air in the bathroom, and when the filling of the bathtub 1 is completed, the temperature is lower than the hot water supply temperature T _S due to heat radiation loss. Therefore, the water heater 7 supplies the hot water temperature T _q in consideration of the heat radiation loss of the hot water by the water temperature detection signal detected by the water temperature detector 12. When the detection signal of the water supply flow rate detector 11 is calculated to reach the set amount of hot water, the on-off valve 9 is closed to stop hot water supply and the pump 2
Is operated to circulate and stir the bath water, eliminate the temperature difference generated above and below the bath water level, and detect the uniform bath temperature by the bath temperature detector 4. Then, when the temperature is lower than the hot-water setting temperature T _S , the additional heating is performed by the additional heating heat exchanger 3.

[0008]

However, in the above configuration, the installation conditions of the device are not fixed, and the pipe length of the additional heating circuit 5 and the heat insulating and heat retaining performance, and the shape and size of the bathtub 1 are installation examples. The amount of heat radiation loss changes variously for each case, and it is not possible to deal with the correction temperature ΔT fixedly set alone, and the bathing temperature often does not match the bathing setting temperature. Therefore, after the hot-water supply, it is necessary to circulate the bath water in the hot-water heating circuit 5 to operate the hot-water heating heat exchanger 3 to heat and raise the temperature to the hot-water setting temperature. Has the drawback of being long.

Therefore, according to the present invention, the bathing temperature of the bathtub is made to coincide with the bathing set temperature only by the bathing hot water supplied from the water heater, and the heating time after the bathing hot water supply is not required and the time required for the bathing can be shortened. A bathtub hot water filling device is provided.

[0010]

[Means for Solving the Problems] And achieving the above-mentioned object.
In order to do this, the means of the bathtub hot water filling device of the present invention is a water heater.
Flow rate detector to detect hot water supply flow rate q (l / min)
And hot water temperature T_qHot water temperature detector to detect
Set amount of hot water_SThe hot water amount setting device for setting (l)
And hot water set temperature T_SAnd a hot water temperature setting device
The boiling temperature T of the stirred bath water_BDetection of hot water temperature
And P = T_q× ∫qdt formula was used to supply hot water to the bathtub
A hot water supply heat quantity calculator for calculating the hot water supply heat quantity P, F = T_B× ∫
Bathing heat quantity F, F by the qdt formula_S= T_S× ∫qd
Target bathing heat quantity F of the bathtub by t formula _SFrom F_S-F =
(T_S-T_B) × ∫qdt = ΔT × ∫qdt
Temperature deviation ΔT for calculating the temperature deviation ΔT
When memorizing ΔT and calculating the hot water supply heat amount P, the hot water supply temperature T
_qInstead of temperature T_SDeviation instructing to use + ΔT
It is equipped with a memory device.

[0011]

[Action] bathtub YuCho apparatus of the present invention by the means, hot water temperature T and YuCho hot water the YuCho set amount Q _S to the bath at _q, YuCho temperature T YuCho temperature detector by stirring bath water Detect _B.
The hot water calorie calculator is F _S −F = (T _S −T _B ) × ∫qdt
The temperature deviation ΔT is calculated by the equation and stored. Then, at the next hot water supply time, the hot water supply heat quantity calculator receives the instruction from the deviation storage unit and performs hot water supply hot water at the temperature T _S + ΔT and the hot water supply flow rate q, which is the hot water supply heat quantity of P = (T _S + ΔT) × ∫qdt. .. At this time, the temperature deviation ΔT is calculated similarly to the previous time, and if there is a difference from the stored temperature deviation ΔT, the memory is updated. In this way, even if the heat radiation loss of the hot water supply changes due to changes in temperature, the temperature deviation ΔT is updated and stored in the deviation storage unit so as to faithfully respond to daily fluctuations. It is possible to obtain the convenience of shortening the time required for hot-water filling by eliminating the need for additional heating after hot-water hot water supply, because the hot-water hot water supply temperature matches the hot-water hot water set temperature.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The bathtub filling apparatus of the present invention will be described in more detail with reference to the specific embodiments shown in the accompanying drawings.

FIG. 1 shows, as an embodiment of the present invention, a gas-fired bath hot water reheating device, in which a bath 20 is connected to a reheating heater 22 by a reheating circuit 21. The reheating heater 22 is provided for reheating when the bath water is cooled and for detecting the hot water temperature T _B , and is connected to the water heater 24 at the connection point 23 so that the hot water supplied from the water heater 24 is reheated. Hot water is supplied to the bathtub 20 through the circuit 21. The amount of hot water set to the bathtub 20, Q _S (l), is set by the hot water amount setter 25 provided in the operation panel 24. On the operation panel 24, a hot water temperature setting device 26 that sets the hot water filling temperature T _B of the bathtub 20 and an operation switch 2 that instructs the hot water filling operation.
Also has 7. The water heater 24 is provided with a water supply flow rate detector 26 for detecting a water supply flow rate q _W (l / min) and a water supply temperature detector 27 for detecting a water supply temperature in a water supply passage 25 connected to a water pipe or the like to receive water supply. The water supply passage 25 supplies water to the hot water supply heat exchanger 28. The hot water supply heat exchanger 28 is heated by burning the gas fuel (hereinafter, also simply referred to as gas) supplied by being proportionally controlled by the gas proportional valve 29 by the burner 30. The hot water supply heat exchanger 28 supplies hot water to the hot water supply path 32 by heating and raising the temperature of the supplied water, and the hot water supply path 32 also supplies hot water from the branch point 33 to the hot water tap 34 of the kitchen or the like. A hot water supply temperature detector 3 for detecting a hot water supply temperature T _q is provided in the hot water supply passage 32.
3. A hot water supply control valve 34 for controlling hot water supply to the bathtub 20 is provided.

A hot water supply passage 35 connected to the hot water supply passage 32 at the connection point 23 is provided in the reheating heater 22, and a hot water supply flow rate detector 36 for detecting the hot water supply flow rate q (l / min) to the bathtub 20 is provided. .. The hot water supply passage 35 is connected to the reheating circuit 21 and is connected at a connection point 38 to a reheating passage 37 for circulating bath water. Ojiro 37
Is a pump 39 that circulates and agitates the bath water, a hot water temperature T _B of the bath water 20 is indirectly detected by detecting the temperature of the hot water (although it may be detected directly), and a hot water temperature detector 40 and the circulating water are detected. An additional heating heat exchanger 43 and the like, which is heated and heated by the combustion gas of the burner 42, are provided. The pump 39 and the like are electrically connected to the controller 44 as shown by a broken line in the figure to send and receive signals.
The controller 44 includes a hot water supply heat quantity calculator 45 for calculating the hot water supply heat quantity P and the like for the hot water tap 34 and the bathtub 20, a hot water heat quantity calculator 46 for calculating the hot water heat quantity F, etc. of the bathtub 20, and a hot water temperature detector 40. It has a deviation storage unit 47, etc., which calculates and stores and updates the temperature deviation ΔT _S between the detected filling temperature T _B and the setting temperature T _S set by the filling temperature setting unit 25.

Based on the above configuration, each operation will be described below according to the flow number (number on the left shoulder) in the operation flowchart of FIG.

At A1, the operation switch 27 is turned on to turn on the hot water.
With the tension temperature setting device 26, the water tension setting temperature T _B, Hot water amount setting device 2
5 amount of hot water set for hot water Q_SWhen each is set, this signal is received.
The notified controller 44 first opens the hot water supply control valve 34.

The controller 44, which has received the detection signal of the water supply temperature T _W by the water supply temperature detector 27 at A2, adds the correction temperature of 1 ° C. inputted in advance to the hot water set temperature T _S , and T _q = T
The hot water supply temperature T _q of _S + 1 is set, and P _O = q _W × (T _q −
T _W ), the feed water flow rate q _W is expressed by the maximum capacity P of the burner 30.
Calculate at _O (efficiency is now 100%). A
3, the maximum gas amount is supplied by the gas proportional valve 29 to burn the burner 30, the opening degree of the hot water supply control valve 34 is adjusted while checking the water supply amount detector 26, and the hot water supply flow rate q _W is maintained. Start hot water supply.

At A4, the controller 44 calculates a time integral value ∫qdt of the hot water supply flow rate q detected by the hot water supply flow rate detector 36 (however, q = q _W when the hot water tap 34 is not supplying hot water at the same time). Compare with the set hot water amount Q _S. A5 time integral value ∫
When qdt is equal to the amount of hot water set Q _S , the hot water supply control valve 3
4 is closed to stop hot water supply to the bathtub 20.

Next, although this operation may be omitted, as a precaution, an A6 operation is provided to operate the pump 39, and the bath water is circulated through the additional heating circuit 21 and the additional heating path 37. Bathtub 2
Stir the bath water, which has a non-uniform water temperature distribution at each water level above and below 0, and adjust it to a uniform water temperature.

During the above operation, the hot water supply calorie calculator 45 is set to P =
The amount P of hot water supplied from the hot water supply device 7 is calculated by the formula (T _S +1) × ∫qdt. Even if hot water is simultaneously supplied by the hot water tap 34, the hot water flow rate detector 36 does not detect the hot water flow rate from the hot water tap 34, and the hot water heat quantity P is accurately detected. When the hot water supply temperature T _S +1 becomes unstable, the arithmetic expression for the hot water supply heat amount P may be P ′ = ∫ (T _S +1) qdt, but the temperature T _S +1 is outside the range ∫ for ease of explanation. I just put it in. Other arithmetic expressions are handled similarly.

When the hot water temperature detector 40 detects that the hot water temperature T _B is agitated and stabilized in A7, the hot water heat amount calculator 46 which receives this detection signal in A8 changes the hot water heat amount F to F = T _B.
× determined by ∫qdt expression, the target YuCho heat F _S F _S = T
Obtained from the formula _S × ∫qdt, and then F _S −F = (T _S −
T _B ) × ∫qdt = ΔT _S × ∫qdt from the temperature deviation Δ
Calculate T. The deviation memory 47 stores and updates the temperature deviation ΔT _S instead of the correction temperature of 1 ° C.

The hot water supply temperature T _q is obtained by adding a fixed correction temperature of 1 ° C. to the hot water set temperature T _S , and the installation conditions of the apparatus do not always match the set condition of the corrected temperature of 1 ° C. Does not match the set heat radiation loss amount corresponding to the correction temperature of 1 ° C. Then, when the temperature deviation ΔT _S is detected, the burner 42 is burned at A9, and the circulating water is heated and heated by the additional heating heat exchanger 43. When the hot water temperature T _B matches the hot water set temperature T _S in A10, the controller 44 receives this detection signal and stops all drive signal output in A11 to stop the hot water supply operation. When the hot water filling temperature T _B happens to coincide with the hot water filling set temperature T _S at A7, the operations of A9 and A10 are skipped and the hot water feeding operation is stopped.

Only the initial hot water supply operation is performed in the same manner as the conventional operation method, and the heat radiation characteristic of the device is detected by the temperature condition during the operation, which is the preliminary operation for capturing the temperature deviation ΔT _S. In this operation, the hot water supply calorie calculator 45, the hot water calorie calorie calculator 46, etc. automatically perform a predetermined calculation work to accurately and quickly generate a complicated heat radiated heat quantity based on various installation conditions of the apparatus. The deviation data can be detected and stored in the deviation memory 47, and can be utilized for the hot water supply operation for the bathtub 20 after the second time described below.

Next, hot water supply to the bathtub 20 after the second time
The operation of driving will be described. Driving with B1 in the same way as A1
When started, the feed water temperature by the feed water temperature detector 27 at B2
T_WThe hot water supply calorie calculator 45 that has received the detection signal of the
According to the instruction of the difference memory 47, the hot water set temperature T_STo temperature deviation
ΔT_SAnd add T_q= T_S+ ΔT_SHot water temperature T_qTo
Set. And P_O= Q_W× (T_q-T_W) = Q_W
× (T_S+ ΔT_S-T _WWater supply flow rate q_WThe bar
Maximum capacity P of na 30_OCalculate at.

Thereafter, from B3 to B7, the above A3 to A7
The operation is advanced under the same control as above.

When it is detected in B8 that the hot-water filling temperature T _B after the stirring is stabilized matches the hot-water filling set temperature T _S , the operation of hot-water feeding is stopped in B9. In the hot water supply operation after the second time, the operation is performed under extremely close use conditions such as the temperature condition of the last hot water supply instead of the fixed correction temperature of 1 ° C. Then, by using the temperature deviation ΔT _S as a setting error of the hot water supply temperature T _q during the previous operation, the hot water supply temperature T _q
The setting error can be suppressed within the detection error of the device, and when the temperature suddenly changes abruptly or other hot water filling conditions are different from the daily life, the hot water filling temperature T _B can match the hot water setting temperature T _S. .. In this way, the bathtub 2 needs only to be filled with hot water from the water heater 24.
The hot water filling operation to 0 can be completed, the additional heating operation by the additional heating heater 22 (flows A9 and A10) becomes unnecessary, and the bath 20
The time required to supply hot water to the hot spring can be shortened. Even if the abnormal condition occasionally occurs, the hot water set temperature T _S can be obtained by the operations of the flows A8 to A10.

The hot-water temperature detector of the present invention may have a configuration in which the reheating heat exchanger 43 and the burner 22 are removed from the above embodiment, and a stirrer is simply provided in the bath to stabilize the stirring. The hot water temperature may be detected, and no extra heating heater is required to adjust and correct the hot water temperature by accurate water filling operation when the cooling process is not required to cool the bath water after hot water filling. It also has the feature of

[0028]

As is apparent from the above description, the bathtub hot water filling device of the present invention stirs the bath water that has been hot water supplied from the water heater to the hot water bath, and calculates the hot water heat quantity and the hot water bath temperature calculated from the hot water temperature. Based on the target amount of heat of hot water calculated from the set temperature, the amount of heat radiated from the hot water supplied by the water heater is radiated in the bathtub, etc. is calculated for each hot water supply. The temperature deviation is obtained, and the next hot water supply temperature is corrected by this temperature deviation. Therefore, the hot water supply temperature that automatically corresponds to the fluctuation of the heat radiation amount due to the difference in the installation conditions of the equipment and the change in the air temperature can be set, and the hot water supply operation from the water heater to the bathtub can be completed. , You can get the convenience to shorten the time required for hot-water filling.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a bathtub filling device of the present invention.

FIG. 2 is a flowchart showing the same operation.

FIG. 3 is a configuration diagram showing a conventional example.

FIG. 4 is a characteristic diagram showing the hot water supply correction temperature.

[Explanation of symbols]

 26 hot water temperature setting device 33 hot water supply temperature detector 36 hot water supply flow rate detector 40 hot water temperature detector 45 hot water supply heat quantity calculator 46 hot water heat quantity calculator 47 deviation memory

Claims (1)

[Claims] 1. Hot water supply flow rate q (l / min) from the water heater to the bathtub
Flow detector for detecting temperature and hot water supply temperature T_qDetect salary
Set the hot water temperature detector and the amount of hot water set to the bathtub Q (l)
Hot water amount setting device and hot water setting temperature T_SHot water to set
Tension temperature setting device and hot water temperature T of stirred bath water_BInspect
Outlet temperature detector, P = T_q× ∫ qdt formula
Hot water heat quantity calculation to calculate hot water heat quantity P for hot water supply to the bathtub
Vessel, F = T_B× ∫ qdt formula bathtub heat quantity F,
F_S= T_S× ∫ qdt expression target bathtub heat quantity F_S
From F_S-F = (T_S-T_B) × ∫qdt = ΔT_S×
∫ qdt expression, temperature deviation ΔT_SYubari calorie to calculate
Calculator and the temperature deviation ΔT _SMemorize and play the amount P of hot water supply
When calculating, hot water temperature T_qInstead of temperature T_S+ ΔT _STo
Bathtub dip with deviation memory to instruct to use
Place