JP2001108293A - Method of automatically filling bath with hot water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of automatically filling a bath with hot water which is made by improving a method of automatically filling a bath with hot water using a heat quantity calculation system more. SOLUTION: In a method of automatically filling a bath with hot water which is so arranged as to perform the filling it with hot water automatically up to the specified set quantity of water by performing a reheating once when the quantity of remaining water in a bathtub is sufficient to allow circulation for reheating and calculating the quantity of the remaining water from the total quantity of reheating heat added by this reheating, temperature rise and time, and subtracting this calculated quantity of remaining water from the set quantity of water so as to obtain the required reheating quantity and injecting this additional reheating quantity, the quantity of the remaining water is calculated by correcting it by the correction corresponding to the temperature of the remaining water measured at calculation of the quantity of the remaining water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic bath filling method using a bath water heater using gas, oil, or electricity as fuel.

[0002]

2. Description of the Related Art Conventionally, there has been known an automatic bath filling method in which hot water or the like is automatically filled in a bathtub until a predetermined amount of water is supplied. In this conventional automatic hot water filling method, if there is residual water in the bath tub in an amount that can be refired and circulated, the reheating is performed once, and the total reheating heat amount added at that time, the rising temperature, and the time are used. The remaining water amount is calculated, and the calculated remaining water amount is subtracted from the set water amount to calculate an additional required amount. By pouring the additional required amount, the filling is automatically performed up to a predetermined set water amount. Was.

[0003]

However, in the above conventional bath automatic hot water filling method, since the efficiency of the bath and the amount of heat supplied are not taken into consideration, particularly when the remaining water temperature in the bathtub is low, or when the bath and hot water are supplied simultaneously. When the input is reduced in the case of use, the calculated value of the remaining water amount varies, and the water level after pouring becomes unstable. On the other hand, the applicant has obtained a minimum water amount from a state where there is no residual water until a reheating cycle is possible in a bath trial operation in Japanese Patent Application No. 9-123082, and uses this as the minimum reference residual water amount of the calculated residual water amount. It proposes a hot water filling method for calculating the additional required amount. However, the above-described error at the time of calculation cannot be solved by this method because the nature thereof is different. In addition, after reheating is performed once to the vicinity of the set temperature before calculating the residual water amount, the reheating is terminated, and then the burner and the pump must be turned on and off many times to calculate the residual water amount. However, not only the driving becomes complicated, but also it takes time to finish pouring.

[0004] In view of the above problems, an object of the present invention is to provide an automatic bath filling method which further improves the automatic bath filling method using the calorific value calculation method.

[0005]

Means for Solving the Problems To solve the above problems, the automatic hot water filling method of the bath according to the present invention is to reheat the bath once the amount of residual water in the bathtub that can be refired and circulated is set. After that, calculate the remaining water amount from the total additional heating heat amount, the rising temperature, and the time added at that time, calculate the additional necessary amount by subtracting the calculated remaining water amount from the set water amount, and note this additional necessary amount. In a bath automatic hot water filling method in which hot water is automatically filled up to a predetermined set water amount by hot water, the remaining water amount is calculated by correcting with a correction value corresponding to the remaining water temperature measured when calculating the remaining water amount. This is a first feature.

According to the first feature, even when the required amount of hot water is poured in the case where there is residual water in the bathtub, the error is extremely reduced, and the accuracy of stopping water can be improved, and stable and quick pouring can be achieved. Can be hot water.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a bath apparatus using the bath automatic hot water filling method of the present invention. FIG. 2 is a flowchart showing an embodiment of the present invention.

In FIG. 1, 1 is a bath water heater,
A heat exchanger 2 for hot water supply, a gas burner 3 provided therebelow, a heat exchanger 4 for bath, a gas burner 5 provided therebelow, and a main body controller 6 are provided therein. Reference numeral 7 denotes a remote controller having a display unit 8 for remotely controlling the bath water heater 1 and displaying a hot water temperature, time, operation state, and the like on a screen, and has a built-in remote controller.

Reference numeral 10 denotes a water inlet pipe to the hot water supply heat exchanger 2;
Reference numeral 1 denotes a tapping pipe from a hot water supply heat exchanger 2 to a hot water supply curran (not shown). The water inlet pipe 10 is provided with a water amount sensor 13 for detecting the amount of water passing from an upstream side thereof and a water temperature sensor 14 for detecting an incoming water temperature. The tapping pipe 11 is provided with a temperature sensor 15 such as a thermistor as a temperature sensing member for detecting the temperature of the hot water heated by the hot water supply heat exchanger 2, and a water flow control valve 12 for controlling the flow rate. This temperature sensor 15
May detect the temperature of the hot water after mixing the hot and cold water.

Reference numeral 16 denotes a gas pipe leading to the gas burner 3.
The gas pipe 16 is provided with a gas solenoid valve 17 as a driving member for opening and closing a gas passage, a proportional valve, and the like. Reference numeral 18 denotes a bathtub provided in the bathroom, and 19 denotes a circulation path of the bath water heater 1 connected to the bathtub 18.
0, a circulation pump 21 and a bath temperature sensor 27 are provided. Reference numeral 22 denotes a hot water supply pipe branched from the hot water supply pipe 11 and connected to the circulation path 19, and an electromagnetic valve 23 and a pouring amount sensor 26 are provided on the way. When dropping, one or both of the outgoing pipe and the return pipe of the bath may be used. 2
Reference numeral 4 denotes a gas solenoid valve provided in a gas passage 25 leading to the gas burner 5.

A circulation fitting 28 is provided at the lower part of the side surface of the bathtub 18. Water in the bathtub enters the circulation path 19 through the circulation fitting 28, is guided to the bath heat exchanger 4, and is heat-exchanged and heated. , Return to the bathtub 18 from the circulation fitting 28. As a result, the water in the bathtub 18 is additionally heated. This circulation fitting 28
For example, if a movable filter is provided in each of the openings on the inflow side to the metal fitting and on the discharge side from the metal fitting, and the suction side is closed and the open side is opened, dust does not accumulate inside the filter.

The main body controller 6 and the remote controller are connected via a communication interface.
The state of the bath water heater main body is determined based on detection signals from various sensors other than the temperature sensor 15 and the water amount sensor 13, and each part of the bath water heater main body (for example, a gas solenoid valve, The operation of the gas proportional valve is controlled.

Next, based on the flowchart of FIG.
A control example of the main body controller will be described. At the time of hot water filling, a bath automatic hot water filling operation is started by turning on a switch or the like of the remote controller 7, and the controller 6 first pours 10 liters from the hot water dropping pipe 22 into the bathtub 18. Command each part of the device (Step S
1). After 10 liters are poured, the controller 6 drives the pump 21 to make a circulation determination (step S).
2). Here, the circulation determination refers to a determination operation in which the pump 21 is driven and the water flow sensor 20 detects whether or not bathtub water circulates in the circulation path 19.

If the result of the circulation determination is no (No in step S2), it can be determined that the bathtub 18 has only the remaining water amount equal to or less than the circulation fitting 28. Therefore, in this case, the controller 6 sets the 10
Bathtub 1
8 is instructed to pour (step S3). Here, the amount of water that is an additional pouring amount does not necessarily need to be 10 liters, and may be any amount of water enough to immerse the circulation fitting 28.

In step S2, if the circulation judgment is YES (YES in step S2), the remaining water amount Q in the bathtub 18 is calculated (step S5). The details of this calculation will be described later. The calculation can be simply expressed, for example, by the following equation 1 from the added total additional heating amount C and the temperature increase ΔT.

Q = C ÷ ΔT Equation 1

The controller 6 determines whether additional pouring is necessary (step S6). This determination is made by comparing the calculated remaining water amount Q with the set water amount Qs. If the calculated remaining water amount Q is equal to or more than the set water amount Qs (step S6)
No), the hot water filling operation is terminated without additional pouring.

On the other hand, if additional pouring is required in step S6 (YES in step S6), the controller 6
Calculates the additional required amount QA to perform pouring (step S7). The calculation of the additional required amount QA is performed by the following equation (2).

Additional required amount QA = set water amount Qs−calculated remaining water amount Q ... Equation 2

When pouring of the calculated additional required amount QA is completed, the filling operation is terminated (step S4).

The contents of the calculation in step S5 will be described. First, the inventors have calculated the remaining water amount Q (liter) calculated from the above equation 1, the temperature rise ΔT (deg) of the bathtub water at that time, and the actual actual remaining water amount (liter).
As a result of confirming the results by experiments and the like, the results are shown in the following table. ΔT Actual residual water amount Residual water amount Q correction value 10 148 148 0 25 148 142 +64 148 128 128 +20 From this table, when the temperature rise ΔT is 10 deg, the calculated bath residual water amount 148 liters and the actual actual water amount 14
Although it coincides with 8 liters and there is no problem, when the rising temperature ΔT is 40 deg, the bathtub remaining water amount is 128 liters by calculation, which does not match the actual actual remaining water amount of 148 liters, and the calculation result is applied as it is. Pouring will cause errors. Therefore, when the residual water temperature in the bathtub is low and the set temperature is high, and in the case of ΔT = 40 in the above table, if the correction value (+20) is added to the value calculated by the equation 1 to correct the actual residual water amount, Reached a match. That is, the correction is performed by adding a function of the temperature increase ΔT in addition to the value calculated by Expression 1. Further, the present invention is not limited to this example, and the correction may be performed based on the temperature rise ratio, that is, the correction may be performed based on the correction value corresponding to the residual water temperature measured when calculating the residual water amount.

The above-described embodiment shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope. Further, the control value of the control flow rate of the pouring amount sensor 26 is set smaller than the control value of the control flow rate of the water flow rate sensor 13 with respect to the water flow rate control valve 12, and the water flow is controlled by both sensors when filling. In this case, since the flow rate is regulated by the smaller flow rate, the pressure resistance of the circulation path 19 of the bath can be increased.

[0023]

According to the present invention, there is provided a method for automatically filling a bath according to the first aspect of the present invention. Perform the heating by heating, calculate the remaining water amount from the total additional heating heat amount, the rising temperature, and the time added at that time, calculate the additional required amount by subtracting the calculated remaining water amount from the set water amount, and calculate the additional required amount. In the bath automatic hot water filling method in which water is automatically filled to a predetermined set water amount by pouring the amount of water, the remaining water amount is corrected by a correction value corresponding to the remaining water temperature measured when calculating the remaining water amount. Is calculated, so that even when the required amount of hot water is poured when there is residual water in the bath tub, the error is extremely reduced, and the water stopping accuracy can be improved, and stable and quick pouring can be performed. it can.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a hot water filling method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bath water heater 2 Heat exchanger 7 Bath remote controller 18 Bath tub 19 Circulation path 26 Pouring amount sensor

Continuing on the front page (72) Inventor, Hisato Kataoka 93, Edocho, Chuo-ku, Kobe, Hyogo Pref. ) Inventor Eiichi Tsuji 93 Edo-cho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Co., Ltd. DD12 DD17 GG06 GG18 HH04 HH13

Claims (1)

[Claims] If there is residual water in the bath tub in an amount that can be refired and circulated, the reheating is performed once, and the residual water amount is calculated from the total reheat heat amount, the rise temperature, and the time added at that time. And
In the bath automatic hot water filling method in which an additional required amount is calculated by subtracting the calculated remaining water amount from the set water amount, and the additional necessary amount is poured to automatically perform hot water filling up to a predetermined set water amount. A bath water filling method, wherein the remaining water amount is calculated by correcting the remaining water amount by a correction value corresponding to the remaining water temperature measured at the time of calculating the remaining water amount.