JPH07305891A - Method and apparatus for controlling temperature of hot supply water - Google Patents

Abstract

PURPOSE:To reduce an error of the temperature of hot supply water to a bathtub from a set temperature by executing supply of hot water while correcting a control temperature of the hot supply water set for a heating means on the basis of the set temperature, in accordance with the temperature of supply water to the heating means or the flow rate of the hot supply water from the heating means to the bathtub. CONSTITUTION:While a hot supply water temperature control device executes supply of hot water to a bathtub 12 while heating supply water by a heating means (a heat source 8 and a tank 4), a temperature detecting means 6 detects the temperature of the supply water to the heating means and a flow rate detecting means 14 detects the flow rate of hot supply water from the heating means to the bathtub 12. A control means 18 executes a control of heating of the heating means so as to conduct supply of hot water, while correcting a control temperature of the hot supply water set for the heating means on the basis of a set temperature, in accordance with the temperature of the supply water to the heating means or the flow rate of the hot supply water. Since the control temperature of the hot supply water set for a boiler in accordance with the set temperature is corrected on the basis of the temperature of the supply water or the flow rate of the hot supply water changing gradually, in this way, an error of the temperature of the hot supply water to the bathtub from the set temperature can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouring temperature control method and device for controlling pouring temperature into a bath, and more particularly,
The present invention relates to those using a simple heating means.

[0002]

2. Description of the Related Art In an automatic bathtub, temperature control methods such as proportional control and automixing are used to supply hot water at a constant temperature to a bathtub. Complicated and expensive,
There are drawbacks such as many failures.

For this reason, a bathtub using a simple water heater for temperature control by only on / off control without using proportional control or automixing has been put into practical use.

[0004]

By the way, in such a bath cooker, since the burner capacity of the water heater is made constant and the burner is simply controlled to be turned on and off, it is difficult to solve the problem.
As shown in Fig. 5, the set (target) temperature and the actual pouring temperature in the bathtub depend on the temperature of the water entering the water heater, the flow rate of water supplied from the water heater to the bathtub, the initial conditions, and the solid differences of the appliances. A large error that cannot be ignored occurs. FIG. 11 shows the relationship between the pouring control temperature and the pouring temperature when the flow rate is constant and the pouring temperature is different. The pouring temperature increases in the order of straight lines r, s, t, and u. Further, FIG. 12 shows the pouring temperature with respect to the pouring control temperature when the incoming water temperature is constant and the flow rates are different, and the flow rates increase in the order of straight lines v, w, x. Due to such a relationship, there is an error between the pouring control temperature and the actual pouring temperature, so the bather had to adjust the temperature each time.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pouring temperature control method and an apparatus for controlling the pouring temperature on the bathtub side by using a simple heating means.

[0006]

In the method for controlling the pouring temperature of the present invention, as shown in FIGS. 1 to 8, the pouring water is poured into the bath while heating the feed water by the heating means (heat source 8 and tank 4). A pouring temperature control method, wherein the pouring control temperature set in the heating means based on a set temperature is corrected according to the feed water temperature to the heating means or the pouring flow rate from the heating means to the bath. The feature is that pouring is performed.

Further, the pouring temperature control device of the present invention, as illustrated in FIGS. 1 to 8, controls the pouring temperature of pouring the water into the bath while heating the feed water by the heating means (heat source 8 and tank 4). An apparatus for detecting temperature of water supplied to the heating means (6, temperature detector 60) and a flow rate detecting means (1) for detecting a pouring flow rate from the heating means to the bath.
4, flow rate detector 140), while correcting the pouring control temperature set in the heating means based on the set temperature according to the feed water temperature to the heating means or the pouring flow rate,
The control means (18, control part 180) which controls the heating of the said heating means and pours molten metal was provided.

[0008]

According to this structure, when pouring the hot water into the bathtub by using a simple heating means such as a boiler, the pouring control temperature set in the boiler according to the set temperature and the supply water temperature which changes momentarily and Since the correction is performed according to the flow rate, it is possible to suppress the error between the set temperature and the pouring temperature into the bath.

The relationship between the pouring control temperature set in the heating means and the actual pouring temperature into the bath is stored in the storage means as a reference value when the feed water temperature or the flow rate is used as a parameter. Since the pouring control temperature set in the heating means is corrected by referring to the value read from the storage means and the value obtained by pouring as the learning value, the error of the pouring temperature corresponding to the set temperature is corrected. Can be suppressed.

[0010]

【Example】

The present invention will now be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows the overall structure of the pouring temperature control device of the present invention. The water 2A supplied from the water supply or the like is electrically detected by the temperature detecting means 6 which detects the supply water temperature. This water 2A is stored in a tank 4 installed as a heating means that is driven intermittently, and is heated by a heat source 8. The temperature of the residual water in the tank 4 is detected by the temperature detecting means 10. The hot water 2B in the tank 4 is supplied to the bathtub 12 through the pouring pipe, and in this case, the pouring amount is detected by the flow rate detecting means 14. The pouring temperature in the bathtub 12 is electrically detected by the temperature detecting means 16. The temperatures detected by the temperature detecting means 6, 10, 16 are input to the control means 18, stored in the storage means 20, and the pouring control temperature is read from the storage means 20. The heat source 8 is controlled by the control means 18.

Next, FIG. 2 shows an embodiment of the pouring temperature control device of the present invention. The temperature of the water 2A is electrically detected by a temperature detector 60, which is an thermistor or the like installed as the temperature detecting means 6 for detecting the supply water temperature, for electrically detecting the water inlet temperature, and Tw1 is added to the controller 180. Indicates the incoming water temperature detection signal. Water 2A is in tank 4
It is stored in the tank 40 of the boiler installed as the above and is heated by the burner 80 installed as the heating means 8. This burner 80 is used for fuel 8 such as kerosene and combustion gas.
2 is a heat source for burning 2 and the pump / solenoid valve 84 is
The fuel 82 is supplied and shut off by the opening and closing, and Dr1 represents an opening and closing drive signal applied from the control unit 180. As a result, the water 2A in the tank 4 is intermittently heated.

The temperature of the residual water in the tank 40 and the temperature of the water 2A at the time of heating are comprised of a thermistor installed as the temperature detecting means 10 in the tank 40 to electrically detect the temperature of the water 100. Is detected by Tw2, and Tw2 represents the tank temperature detection signal applied to the controller 180.

The hot water 2B obtained in the tank 40 is a solenoid valve 110 installed as hot water supply control means for controlling hot water supply.
Is supplied to the bathtub 12 after passing through the
It represents an opening / closing drive signal applied from 80.

The flow rate of the hot water 2B passing through the solenoid valve 110 is detected by the flow rate meter 140 for electrically detecting the flow rate, which is installed as the flow rate detecting means 14 for detecting the flow rate, and Dm is added to the control section 180. Represents a flow rate detection signal.

The warm water 2B that has passed through the flow meter 140 is
Warm water 2B in the bathtub 12 is supplied and stored in the bathtub 12.
Is stirred by the stirrer 120 to be mixed with the residual water in the bath 12. Dr3 represents a drive signal applied from the control unit 180 to the stirring device 120. The temperature of the hot water 2B in the bathtub 12 is the temperature detecting means 1
Tw3 is detected by a temperature detector 160 that electrically detects the temperature, which includes a thermistor installed as No. 6 and
Represents a temperature detection signal applied to the control unit 180.

The control unit 180 performs optimum temperature control based on the temperature and flow rate set through the remote controller 195 installed on the bathroom side. As shown in FIG. 3, a microcomputer or the like is used. And is installed on the side of the main body of the equipment. That is, in the controller 180, the temperature detection signals Tw1, Tw2,
Along with Tw3, a flow rate signal Dm0 representing the set flow rate set by the remote controller 195 and a temperature signal Tw0 representing the set temperature are applied to the analog-to-digital converter (ADC) 182 by time division via the multiplexer 181, and After being converted into a digital signal, it is taken into the central processing unit (CPU) 183. Since the flow rate detection signal Dm is a digital signal, the input unit 184
And are taken into the CPU 183.

The CPU 183 performs arithmetic processing according to a control program such as heating and supply written in a memory element (ROM) 200 dedicated to writing. In addition, the various data and the data on the arithmetic processing that have been taken in are written in the storage element (RAM) 202 which can be freely written and read.

The drive control output as the calculation result of the CPU 183 is output from the output unit 187 and added to the drive unit 188 as drive means for driving the controlled object.

The output of the drive unit 188 is applied to the relays 19A, 19B and 19C as a drive control signal. In this case, the control unit 180, the drive unit 188 and the relay 19A,
19B and 19C are supplied with necessary power from a power supply device 189 driven by an AC power supply 22, and
The solenoid valves 84, 110 and the agitator 120 have a relay 1
The AC power supply 22 is individually supplied via 9A, 19B, and 19C.

In such a bath kettle, the pouring temperature control will be described with reference to FIGS. 4 to 8.

The ROM 200 is used as means for controlling the temperature.
Regarding the characteristics and history of the equipment, as shown in Fig. 4,
The pouring temperature obtained with respect to the pouring control temperature when the flow rate is constant and the incoming water temperature is a parameter, as shown in FIG. 5, the pouring control temperature when the incoming water temperature is constant and the flow rate is a parameter 6, the pouring temperature obtained with respect to the pouring control temperature when the capacity of the tank 40 is fixed and the temperature of the residual water in the tank 40 is used as a parameter, as shown in FIG. Are stored as learning values, that is, correction data. Here, the pouring temperature is a target temperature at which the hot water temperature of the hot water 2B in the bathtub 12 is reached, and the pouring control temperature is a control temperature set on the boiler side which is a heating means. The pouring control temperature is the temperature that should be set on the boiler side when the pouring temperature, which is the target temperature, is realized.

FIGS. 7 and 8 are flow charts for pouring control, where x and y are connectors of each flow chart. During pouring, the control unit 180 causes the pouring amount (flow rate) set in the remote controller 195 in step S1.
And then the set temperature set in the remote controller 195, that is, the boiling temperature of the hot water 2B in the bathtub 12 is taken in in step S2. In step S3, the learning value, which is the previous control record accumulated in the RAM 202, is referred to.

In step S4, the temperature of the hot water in the tank 40 by the temperature detector 10, that is, the initial hot water storage temperature is taken in, and in step S5, pouring of water from the tank 40 into the bath 12 is started. In step S6, measurement of the pouring amount into the bathtub 12 is started, the flow rate is detected in step S7, and the water temperature entering the tank 40 is detected in step S8. Then, in step S9, the pouring control temperature is read from the detected incoming water temperature, flow rate or the temperature of the residual water in the tank 40 and the pouring temperature, and the pouring control temperature to be set is calculated.

In step S10, the temperature detected by the temperature detector 10 is compared with the pouring control temperature, and the burner 80 of the boiler is compared.
Combustion control.

Next, in step S11, it is determined whether or not a predetermined amount of hot water has been poured into the bathtub 12, and if not (NO), the process returns to step S6. If the predetermined pouring amount has been completed (YES), the process moves to step S12 to stop pouring, and in step S13, the temperature of the hot water in the bathtub 12, that is, the actual temperature, is detected by the temperature detector 16. Measure the hot water temperature T _E.

Then, in step S14, the set temperature T
If the difference between W and the hot water temperature TE is calculated and it is determined that (TW-TE)> 1 ° C (YES), step S15.
Then, it is determined that the pouring temperature is low, and (TW-TE)-(-1.5 ° C) is calculated as the correction value to calculate the correction value. If it is determined in step S14 that (TW-TE)> 1 ° C is not satisfied (NO), step S16
Move to.

Then, in step S16, -2.5≤TW-
It is determined whether or not TE ≤ 1 ° C, and -2.5 ≤ TW -TE
If ≦ 1 ° C. (YES), the correction value is not calculated as the aptitude control in step S17. That is, the current correction value φ is appropriate. If -2.5≤TW-TE≤1 ° C is not satisfied (NO), the process proceeds to step S18 and -2.5.
It is determined whether or not ≤ TW-TE, and as a result, -2.5
If ≤TW-TE (YES), step S19
Then, it is determined that the pouring temperature is high, and (TW-TE)-(-1.5 ° C) is performed as the correction calculation to calculate the correction value.

The correction value obtained in step S15, S17 or S19 is learned and updated in step S20. This new learning value TG is obtained and the pouring temperature is corrected, so that the pouring temperature with less error with respect to the set temperature can be realized.

Next, FIG. 9A shows the deviation (influence amount) from the temperature condition as the initial condition of the boiler when the amount of stored hot water is 15 liters.
When there is 5 liters, there is no effect on the pouring control temperature within the temperature range of 40 ° C to 55 ° C, and the temperature of 33 ° C to 40 ° C
In the range of −0.5 ° C., and in the temperature range of 40 ° C. to 55 ° C., it is affected by about + 0.5 ° C.

Further, FIG. 9B shows the flow rate (liter / minute).
Represents the amount of influence by. If the flow rate during pouring decreases, the pouring temperature rises accordingly. Therefore, in order to suppress the temperature change, the pouring control temperature should be lowered correspondingly.

The pouring temperature control device of the present invention can be applied to a device having a reheating circuit 210 as shown in FIG. 10, where 211 is a hopper, 212 is a pump, and 2 is a pump.
13 is a circulation port, 214 is a temperature detector, and 215 is a three-way valve. Then, Tw4 is the temperature detection signal, Dr5 is the pump 2
Dr6, a drive signal for 12, represents a switching signal for the three-way valve 215.

[0034]

As described above, according to the present invention,
When a simple heating means such as a boiler is used, the pouring control temperature is set in the heating means according to the set temperature, the temperature of the residual water in the heating means, the feed water temperature to the heating means, and the flow rate while heating the incoming water. While pouring into the bathtub, the pouring is performed while correcting the pouring control temperature according to the changing water supply temperature and flow rate, so that the desired pouring temperature can be obtained according to the changing temperature conditions. Therefore, it is possible to eliminate an error due to a history such as wear of the heating means.

[Brief description of drawings]

FIG. 1 is a block diagram showing a pouring temperature control method and an apparatus therefor according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a pouring temperature control method and apparatus therefor according to the present invention.

FIG. 3 is a block diagram showing a configuration of a control unit of the pouring temperature control device.

FIG. 4 is a diagram showing an actual pouring temperature with respect to a pouring control temperature.

FIG. 5 is a diagram showing an actual pouring temperature with respect to a pouring control temperature.

FIG. 6 is a diagram showing an actual pouring temperature with respect to a pouring control temperature.

FIG. 7 is a flowchart showing an embodiment of the pouring temperature control method of the present invention.

FIG. 8 is a flowchart showing an embodiment of the pouring temperature control method of the present invention.

FIG. 9 is a diagram showing initial conditions in the pouring temperature control device of the present invention.

FIG. 10 is a block diagram showing another embodiment of the pouring temperature control method and the apparatus therefor according to the present invention.

FIG. 11 is a diagram showing an actual pouring temperature with respect to a pouring control temperature when a simple heating means is used.

FIG. 12 is a diagram showing the actual pouring temperature with respect to the pouring control temperature when a simple heating means is used.

[Explanation of symbols]

 2A water 2B hot water 4,40 tank (heating means) 6 temperature detection means 8 heat source 10 temperature detection means 12 bathtub 14 flow rate detection means 140 flow rate detector 16 temperature detection means 160 temperature detector 18 control means 20 storage means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takanori Morita 201 Nishi-Kashiwabara Shinden, Fuji City, Shizuoka Prefecture Takagi Industry Co., Ltd. (72) Inventor Masaru Nagata 201 Nishi-Kashiwabara Shinden, Fuji City, Shizuoka Prefecture Takagi Industry Within the corporation

Claims (2)

[Claims] 1. A pouring temperature control method for pouring a water into a bath while heating a supply water by a heating means, wherein a pouring control temperature set in the heating means based on a set temperature is supplied to the heating means. A pouring temperature control method, wherein pouring is performed while making corrections according to the pouring water temperature or the pouring flow rate from the heating means to the bath. 2. A pouring temperature control device for pouring hot water into a bath while heating the hot water with a heating means, wherein the temperature detecting means detects a temperature of water supplied to the heating means, and pouring from the heating means into the bath. The flow rate detecting means for detecting the flow rate of the hot water and the pouring control temperature set in the heating means based on the set temperature are corrected while correcting the pouring control temperature according to the water supply temperature to the heating means or the pouring flow rate. A pouring temperature control device comprising: a control unit that controls the heating of the unit to perform pouring.