JPH0587397A - Hot water retention controller for automatic bath apparatus - Google Patents

Abstract

PURPOSE:To obtain a controller for an automatic bath apparatus having flag stand deciding means for deciding whether previous hot water retention level is lowered to a set flow rate or not at the time of hot water retention and circulation deciding means for deciding presence or absence of residual water in a bathtub only when a flat is ON in the apparatus for retaining a hot water level in the bathtub by using a flowrate sensor without using a water level sensor. CONSTITUTION:An automatic bath apparatus comprises a drop hot water supplying circuit 45 for supplying hot water to a bathtub 42, an additional burning circuit 54 for additionally burning to heat hot water in the bathtub 42, and flowrate detecting means 55 for detecting a flow rate to be supplied into the bathtub 42. Further, the apparatus comprises flowrate setting means 49 for setting a flow rate to be supplied to the bathtub, a flag becoming OFF when an automatic hot water retention is finished, flag stand deciding means for deciding whether the flag is ON or not, and circulation deciding means for deciding presence or absence of residual water in the bathtub.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water filling controller for an automatic bath apparatus without a water level sensor.

[0002]

2. Description of the Related Art As an example of a conventional automatic bath device having no water level sensor, there is an example in Japanese Patent Publication No. 1-31106. The example will be described with reference to FIGS. 3 and 4. FIG. 3 shows the configuration of an automatic bath device of a conventional example, and FIG. 4 shows a flow chart in control. Reference numeral 1 denotes a bath kettle with a water heater, in which a momentary water heater 2 and a bath water circulation heater 3 are installed side by side.
The instantaneous water heater 2 comprises a heat exchanger 4 for hot water supply, a burner 5 for heating it, a water inlet pipe 6 connected to the city water supply pipe, a hot water outlet pipe 7 and the like. The water inlet pipe 6 has a flow rate sensor 8 and water temperature detection. A thermistor 9, a tap water temperature detecting thermistor 10 and a flow rate controller 11 are arranged in the hot water outlet pipe 7, respectively.

On the other hand, the bath hot water circulation heater has a circulation heat exchanger 12, a burner 13, a bath hot water return pipe 14, a bath hot water return pipe 15,
A self-priming pump 16 arranged in the return pipe 15, a flow rate switch 17 arranged upstream thereof, a circulating hot water temperature detection thermistor 1
8 etc. are provided. The outflow pipe 14 and the return pipe 15 are integrated into a single tube with two tubes, and their ends are opened to the side wall of the bathtub 19 in the bathroom.

A bath hot water supply pipe 20 connects the hot water discharge pipe 7 on the downstream side of the flow rate controller 11 and the pump outlet side of the return pipe 15,
Flow sensor 21 from the side of hot water pipe 7, solenoid valve 2 for bath hot water supply
2. It has a vacuum break valve 23 and a check valve 24 for preventing backflow of dirty water. A gas proportional control valve 25 is provided in the gas passage to the burner 5 of the water heater 2, and the set temperature set by a remote controller, the water temperature detected by the thermistor 9 and the flow rate detected by the flow rate sensor 8 are stored in the microcomputer. Gas proportional control valve 25
The amount of combustion is changed by adjusting the opening of to maintain the hot water temperature constant.

The thermistor 10 is for feeding back the detected hot water temperature, and the flow rate controller 11 is for flowing a flow rate that maximizes the heating capacity with respect to the set temperature. is there. Reference numeral 26 is a gas solenoid valve provided in the gas path to the burner 13, and 27 is an exhaust fan for discharging the waste gas from both the heaters 2 and 3 to the outside of the apparatus. Reference numeral 28 denotes a remote controller provided near the bathtub 19, which has a power switch 29, a hot water temperature adjusting knob 30 for hot water supply, a bath reheating switch 31, a bath automatic switch 32, a bath temperature setting knob 33, a hot water amount setting knob 34, and the like. Reference numeral 35 denotes a controller for centrally controlling various functions of the bath tub 1 with a water heater, which has a built-in microcomputer.

Next, the conventional control will be described with reference to FIG. When the bath automatic switch 32 is turned on (S21), the automatic water filling is started, the pump 16 is turned on (S22), and then the judgment mode (S23) of whether or not the flow rate switch 17 is turned on is entered. , Determine the remaining water in the bathtub. The residual water determination here means that there is residual water when the flow rate switch 17 is ON, and that there is no residual water when it is OFF. Flow switch 1
If 7 is ON, it is considered that there is residual water, and the automatic hot water filling is terminated (S25). If the flow rate switch is OFF, it is considered that there is no residual water, the solenoid valve 22 is opened, and the hot water amount setting knob 34
The set flow rate set for is dropped (S24). When the dropping is completed, the solenoid valve 22 is closed and the automatic filling is completed (S25).

[0007]

However, in the conventional automatic bath apparatus that does not use the water level sensor, when performing automatic filling, it is determined whether or not the drop of the set flow rate has been completed in the previous automatic filling. Since the circulation determination is always performed when the bath automatic switch is turned on without performing the bath, there is a problem that the automatic filling operation is delayed by the time required for the circulation determination. Therefore, an object of the present invention is to provide a control device in an automatic bath device that can prevent hot water from overflowing from a bath while performing automatic filling without delaying the completion of automatic filling when performing automatic filling. And

[0008]

In order to solve the above problems, the present invention provides a drop-in hot water supply circuit for supplying hot water to a bathtub, a reheating circuit for reheating the hot water in the bathtub, and a hot water refilling circuit in the bathtub. In a filling controller for an automatic bath device, which is provided with a flow rate detecting means for detecting a supplied flow rate, a flow rate setting means for setting a flow rate to be supplied to a bathtub, and a flag which is turned off when the automatic filling is completed. A flag standing determination means for determining whether or not the flag is ON, and a circulation determination means for determining the presence or absence of residual water in the bathtub are provided.

[0009]

In the automatic bath apparatus, by providing the flag standing up judging means for judging whether the flag is ON or not, when the automatic hot water filling is performed, the drop of the set flow rate is completed in the previous automatic hot water filling. It is possible to determine whether or not it is possible. When the flag is OFF, the circulation determination is not performed, and only when the flag is ON, the circulation determination is performed. Compared with this, the automatic filling time can be shortened.

[0010]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, in which 41 is an automatic bath device and 42 is a bathtub. The automatic bath device 41 incorporates a water heater 43 and a forced circulation reheating device 44. The water heater 43 has a flow sensor 50 and a flow control valve 51.
And are arranged in the hot water supply circuit 52. Forced circulation reheating device 4
4, a thermistor 59, a circulation pump 53, and a water flow switch 58 are arranged in this order in the reheating circuit 54. Four
A drop hot water supply circuit 5 connects the downstream side of the flow control valve 51 of the hot water supply circuit 52 and the reheating circuit 54, and the drop flow sensor 55, the vacuum breaker 56, and the drop solenoid valve 57 are arranged in this order. Has been done. Reference numeral 46 denotes a control device having a built-in microcomputer, which inputs the outputs of the flow rate sensors 50 and 55 and drives and controls the flow rate control valve 51 and the electromagnetic valve 57. Further, 47 is a remote controller, and when the automatic filling switch 48 is turned on, the flow rate control valve 51 and the solenoid valve 57 are opened to drop into the bathtub 42, and the drop flow rate into the bathtub is the flow rate setting button 49.
It is set by the flow rate setting means such as.

Next, the filling operation using the automatic bath apparatus 41 having the above-mentioned structure will be described with reference to the flow chart of FIG. When the automatic water filling switch 48 of the remote controller 47 is turned on (S1), the automatic water filling is started, and the set flow rate change determination mode (S2) of whether or not there is a change from the completed flow rate after the previous automatic completion is set. If the flag is turned on and there is a change in step 2, the flag rise determination mode (S3) for determining whether the flag F is ON or not is entered. Here, the previous automatic completion means the completion of automatic filling with the previously set flow rate. If there is no change in step 2 and if flag F is on in step 3, go to the bathtub
(10 l as an example, it is not necessary to limit to 10 l) is dropped (S6), and the circulation determination (S7) as to whether or not there is residual water in the bath 2 is performed. Here, the circulation determination means that the circulation pump 53 is turned on and the water flow switch 58 is turned on.
By determining whether or not N, the water flow switch 58 is O
If it is FF, it is considered that there is no residual water, and the water flow switch 58 is O
If it is N, it is considered that there is residual water.

In step 7, if there is no residual water, an amount reduced by 10 l from the set flow rate (for example, 10 l,
There is no need to limit it) (S8), and after finishing the dropping into the bathtub, cancel the flag F (S8).
9), additional heating (S10), and heat retention (S11) are sequentially performed.
Here, reheating means that the electromagnetic valve 57 is closed and the circulation pump 5
3 is turned on to circulate the hot and cold water in the bath 42, and a burner (not shown) is turned on to heat the remote controller 47 to the set temperature. The heat retention is to turn on a burner (not shown) to a preset temperature of the remote controller 47 when the temperature of the hot and cold water in the bathtub 42 drops, and to keep the hot water temperature constant by repeating this.

If there is residual water in step 7, the flag F is canceled (S9) and reheating (S10),
Insulation (S11) is sequentially performed. If the flag F is OFF in step 3, the flag F is turned ON (S4).
The dropping into the bathtub is started, the changed set flow rate is dropped (S5), the flag F is canceled after the dropping is finished (S9), the additional heating (S10) and the heat retention (S11) are sequentially performed.

[0014]

EFFECTS OF THE INVENTION According to the present invention, in short, a flag is provided which is turned off when dropping to a set flow rate is completed in automatic water filling, and a flag standing determination means for determining whether or not the flag is turned on is provided, and Since the circulation determination means for determining the presence / absence of residual water in the bathtub is provided only when the flag is ON, the automatic filling time can be shortened as compared with the conventional case where the circulation determination is always performed during automatic filling. Produced an effect.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an automatic bath device showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the contents of the embodiment of the present invention.

FIG. 3 is an overall configuration diagram of a conventional automatic bath device.

FIG. 4 is a flow chart showing the contents of a conventional automatic bath device.
It's a chart.

[Explanation of symbols]

 41 Automatic Bath Equipment 42 Bathtub 45 Drop-in Hot Water Supply Circuit 49 Flow Rate Setting Button 50 Flow Rate Sensor 53 Pump 54 Reheating Circuit 55 Flow Rate Sensor 58 Water Flow Switch

Front page continuation (72) Inventor Kenken Kubotani, Noritsu Co., Ltd., 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture (72) Masami Tani, No. 32 Akashi-cho, Chuo-ku, Kobe, Hyogo (72) Inventor Masakuni Morikawa 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Noritsu Co., Ltd.

Claims (1)

[Claims] 1. A drop-in hot water supply circuit for supplying hot water to a bathtub, a reheating circuit for reheating the hot and cold water in the bathtub, a flow rate detecting means for detecting a flow rate supplied to the bathtub, and a bathtub. A hot water filling controller for an automatic bath apparatus, which comprises a flow rate setting means for setting a flow rate to be supplied and a flag that is turned off when the automatic hot water filling is finished, and a flag standing up determining whether the flag is turned on or not. A filling controller for an automatic bath device, which is provided with a judging means and a circulation judging means for judging the presence or absence of residual water in the bathtub.