JPH05196294A - Hot water supplying device for bathtub - Google Patents

Abstract

PURPOSE:To bring a water surface level of a bathtub and a water temperature of the bathtub at the time of finishing supply of hot water into coincidence with desired values by supplying a predetermined quantity of hot water at a predetermined temperature, and then additionally supplying a quantity of hot water at an additional supply hot water temperature. CONSTITUTION:A set quantity Qa of hot water is supplied. A hot water supply temperature T0 at this time is equal to a target temperature Ts. Incidentally, the quantity Qa is set to the degree of dipping a bath adapter. Then, the temperature T0 of the water of the bathtub at that time point is detected, and hot water of a target temperature Ts of a predetermined quantity Q1 is supplied. Thereafter, a temperature T2 of water of the bathtub at that time point is detected. An additional quantity Qx of hot water and an additional supply hot water temperature Tx necessary to set hot water retention state of the bathtub to the quantity Qs and the temperature Ts are obtained, and hot water is supplied based on the information. Accordingly, a water surface level and a water temperature of the water of the bathtub at the time of finishing supply of hot water can be respectively brought into coincidence with desired values.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply amount detecting means for detecting a hot water supply amount to a bathtub, a hot water supply temperature detecting means for detecting a hot water supply temperature to the bathtub, and a bathtub temperature detecting means for detecting a bath water temperature. The present invention relates to a hot water supply device for a bathtub, which is provided with setting means for setting a target hot water amount and a target temperature for hot water supply to the bathtub, and control means for controlling hot water supply to the bathtub.

[0002]

2. Description of the Related Art As described above, in a hot water supply device for a bathtub which is not provided with means for directly detecting the water level of the bathtub, hot water supply to the bathtub is controlled regardless of whether hot water or water remains in the bathtub. Was there. That is, in the hot water supply, the hot water of the target temperature is supplied by the target amount of hot water.

[0003]

The target amount of hot water corresponds to the desired bathtub water level, and the target temperature corresponds to the desired bathtub water temperature. The bathtub water level and the bathtub water temperature at the end of hot water supply have the desired values, respectively. It is desirable that they match. However, in the above conventional technique, the bath water level and the bath water temperature may not match the desired values. In hot water supply, for example, when there is cold hot water remaining, the bath water level becomes higher than the desired water level. On the other hand, the bath water temperature becomes lower than the target temperature. An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to obtain a hot water supply device for a bathtub capable of making the bathtub water level and the bathtub water temperature at the end of hot water supply respectively match desired values.

[0004]

In order to achieve this object, the bathtub water heater according to the present invention is characterized by the information of the bath temperature detecting means when the bath is supplied with a predetermined amount of hot water. Based on the amount of additional hot water and the additional hot water temperature required to bring the bathing state of the bathtub to the target amount of hot water and the target temperature, the control unit is provided, and the control unit stores information in the calculating unit. The hot water supply to the bathtub is controlled based on the above.

[0005]

[Function] The remaining hot water amount in the bathtub is Q0, and the remaining hot water temperature is T0.
And In this state, the bath water temperature after supplying a predetermined amount Q1 of hot water having a predetermined temperature T1 is defined as T2. At this time, the remaining hot water amount Q0 can be calculated by the equation 1.

[0006]

## EQU1 ## Q0 = Q1 × (T1-T2) / (T2-T0)

Therefore, the additional hot water supply amount Qx and the additional hot water supply temperature Tx required to bring the hot-water condition of the bathtub to the target hot water amount Qs and the target temperature Ts can be calculated by Equations 2 and 3, respectively.

[0008]

## EQU00002 ## Qx = Qs-Q0-Q1

[0009]

## EQU00003 ## Tx = [Ts * Qs-T2 * (Q0 + Q1)] / Qx

[0010]

By supplying a predetermined amount of hot water at a predetermined temperature and then supplying an additional amount of hot water at an additional hot water supply temperature, it is possible to set the bathing state to the target hot water amount and the target temperature. Therefore, it is possible to obtain a hot water supply device for a bathtub capable of making the bathtub water level and the bathtub water temperature at the end of hot water supply respectively match desired values.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a hot water supply A for supplying hot water to the bath tub 1 through a hot water supply passage W3 and a remote controller R for giving a command to the hot water supply A are provided to configure a hot water supply device for a bath. ing.

The water heater A has a burner 4, a heat exchanger 2 for heating water which is heated by the burner 4, and a controller 3.
And are provided. A water amount sensor S1 as a hot water amount detecting means for detecting the amount of hot water supplied to the bathtub 1 and an incoming water temperature sensor S2 for detecting an incoming water temperature are provided in the water supply passage W1 for supplying water to the heat exchanger 2. There is. In the hot water supply path W2 for supplying hot water from the heat exchanger 2 to the hot water supply path W3, a flow rate adjusting valve 8 for adjusting the amount of hot water supplied to the hot water supply path W3, an intermittent valve 9 for intermittently supplying hot water, and hot water supply to the bathtub 1 A hot water outlet temperature sensor S3 as a hot water supply temperature detecting means for detecting the temperature To is interposed. A gas valve 10 that connects and disconnects the gas supply and a gas amount adjustment valve 11 that adjusts the gas supply amount are interposed in the gas supply path G1 that supplies the fuel gas to the burner 4.

A bath adapter 15 is provided at the hot water supply port of the bathtub 1.
The bath adapter 15 is provided with a bath temperature sensor S4 as a bath temperature detecting means for detecting the bath water temperature. Reference numeral 17 in the figure is a vacuum breaker.

The remote controller R has an operation switch 20 for instructing start / stop of hot water supply operation, a hot water switch 21 for instructing hot water supply to the bathtub 1, and an additional heating switch 22 for instructing hot water supply to the bathtub 1. A temperature setting device 23 that sets a target temperature Ts of bath water, a water level setting device 24 that sets a target hot water amount Qs for hot water supply, and the like are provided. That is, the temperature setting device 23 and the water level setting device 24 correspond to the setting means.

A configuration for controlling hot water supply to the bathtub 1 will be described. The controller 3 includes a water amount sensor S1, an incoming water temperature sensor S2, a hot water temperature sensor S3, a bath temperature sensor S4,
Each of the remote controllers R is connected. Then, the controller 3 calculates the bathtub 1 based on the equations 1 to 3.
The additional hot water supply amount Qx and the additional hot water supply temperature Tx necessary to bring the hot water expansion state to the target hot water amount Qs and the target temperature Ts are calculated, and based on the calculation results, the flow rate adjusting valve 8, the on-off valve 9, the gas valve 10. The operation of the gas amount adjusting valve 11 is controlled. That is, the controller 3 is used to configure the control unit 100 and the calculation unit 101.

Next, the operation of the controller 3 in hot water supply will be described with reference to the flow chart shown in FIG. First, the set amount Qa of hot water is supplied. Hot water supply temperature To at this time is equal to target temperature Ts. The set amount Qa is set so that the bath adapter 15 is immersed when hot water is supplied from the empty bathtub 1. Next, the bath water temperature T0 at that time is detected. Here, for convenience, the amount of hot water and the bath water temperature after supplying the set amount Qa of hot water correspond to the remaining hot water amount Q0 and the remaining bath water temperature T0 in Equation 1. Then, a predetermined amount Q1 of hot water having the target temperature Ts is supplied. That is, here, the target temperature Ts corresponds to the predetermined temperature T1 in Expression 1. After supplying a predetermined amount of hot water Q1, the bath water temperature T2 at that time is detected. Then, the additional hot water supply amount Qx and the additional hot water supply temperature Tx required to bring the hot-water condition of the bathtub to the target hot water amount Qs and the target temperature Ts are obtained based on Formulas 2 and 3, and hot water is supplied based on the information.

Next, the operation of the controller 3 in the additional hot water supply will be described with reference to the flow chart shown in FIG. First, the residual bath water temperature T0 at that time is detected.
Next, a predetermined amount of hot water of 93 degrees is supplied Q1. That is, 93 degrees corresponds to the predetermined temperature T1 in the equation 1 here. After supplying a predetermined amount of hot water Q1, the bath water temperature T2 at that time is detected. Then, the additional hot water supply amount Qx and the additional hot water supply temperature Tx required to bring the hot-water condition of the bathtub to the target hot water amount Qs and the target temperature Ts are obtained based on Formulas 2 and 3, and hot water is supplied based on the information.

[Other Embodiments] In the above embodiment, the target temperature Ts is associated with the hot water supply and 93 degrees is associated with the predetermined temperature T1 in the reheating hot water supply, but other temperatures are set to the predetermined temperature T1. You may correspond.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a block diagram of the overall configuration

FIG. 2 is a flowchart of control operation.

FIG. 3 is a flowchart of control operation.

[Explanation of symbols]

 1 Bathtub 23, 24 Setting means 100 Control means 101 Computing means S1 Hot water supply amount detecting means S3 Hot water supply temperature detecting means S4 Bathtub temperature detecting means T1 Predetermined temperature To Hot water supply temperature Ts Target temperature Tx Additional hot water temperature Q1 Predetermined amount Qs Target hot water amount Qx Additional hot water supply amount

Claims (1)

[Claims] 1. A hot water supply amount detecting means (S1) for detecting a hot water supply amount to a bathtub (1), and a hot water supply temperature (T) to the bathtub (1).
hot water supply temperature detecting means (S3) for detecting o), bath temperature detecting means (S4) for detecting bath water temperature, and the bath (1)
Setting means (23) and (24) for setting a target hot water amount (Qs) and a target temperature (Ts) for hot water supply to the hot water supply and a control means (100) for controlling hot water supply to the bathtub (1) are provided. A hot water supply device for a bathtub, wherein hot water having a predetermined temperature (T1) is supplied to the bathtub (1) in a predetermined amount (Q).
1) Addition necessary to bring the bathing state of the bathtub (1) to the target hot water amount (Qs) and the target temperature (Ts) based on the information of the bathtub temperature detecting means (S4) when hot water is supplied. A calculating means (101) for calculating a hot water supply amount (Qx) and an additional hot water supply temperature (Tx) is provided, and the control means (10) is provided.
0) is configured to control hot water supply to the bathtub (1) based on the information of the calculating means (101).