JPH07117288B2 - Bath kettle with water heater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to automatic temperature control of bath water in a bath with a water heater.

2. Description of the Related Art In recent years, in water heaters and bath kettles with water heaters, an increasing number of devices are capable of automatically supplying hot water to a bath and controlling the bath temperature with a single switch of a remote control device.

An example of the conventional automatic temperature control of the bath water temperature of the above-described bathtub with a water heater will be described below with reference to the drawings.

FIG. 3 shows the overall configuration of a conventional bath kettle with a water heater, and FIG. 4 shows the conventional automatic control operation of the bath bath temperature and changes in the bath temperature.

In FIG. 3, 1 is a remote control device for kitchen, 2 is a remote control device for bathroom, which has automatic operation switches 1a and 2a and a hot water temperature setting switch 1b as switches for controlling the bath water temperature. A water level sensor 3 is connected to the bath heat exchanger 7 and detects the water level of the bath tank 6. A circulation pump 4 for stirring the hot water of the bath 6 and a thermistor 5 for detecting the hot water temperature are attached to a part of the water passages of the bath 6 and the bath heat exchanger 7. Reference numeral 8 is a bath main burner. 9 is an electric control unit,
The remote control devices 1 and 2 are electrically connected to functional components such as the water level sensor 3, the thermistor 5, and the circulation pump 4.

The operation of the bath tub with a water heater constructed as described above will be described below with reference to FIGS. 3 and 4.

Set the desired hot water temperature with the hot water temperature setting switch 1b of the kitchen remote controller 1 and then set the automatic operation switch 1a or 2a to "O".
N "(in Fig. 4), the water level sensor 3 will bathe 6
After detecting that there is hot water in the bath, the circulation pump 4 starts to operate, the hot water in the bath 6 is circulated and stirred with the bath heat exchanger 7, and the hot water temperature is detected by the thermistor 5. . If the bath water temperature at this time is lower than the set bath temperature, the bath main burner 8 starts burning to approach the set bath temperature, and the bath temperature of the bath bath 6 starts to rise (Fig. 4). When the bath soaking water temperature detected by the thermistor 5 reaches the set hot water temperature, the electric controller 9 works to stop the combustion of the bath main burner 8 (see FIG. 4). During this period, the circulation pump 4 continues to operate, and the hot water in the bath 6 is constantly stirred, so that an accurate hot water temperature can be obtained with respect to the desired hot water temperature and comfortable bathing is possible.

Problems to be Solved by the Invention However, in the above configuration, when it is desired to make the temperature lower than the boiling water temperature once, the remote operation device 1 lowers the set hot water temperature and the automatic operation switch 1a or 2a is turned on. When the thermistor 5 detects a temperature higher than the set hot water temperature (Fig. 4), no change occurs in the operation of the equipment, and in order to obtain the desired hot water temperature, add water in the bathroom. Therefore, there is a problem that the automatic temperature control in the direction of lowering the bath temperature cannot be performed.

The present invention solves such a conventional problem, and the hot water temperature in the bath can be controlled by operating the remote control device regardless of whether the hot water temperature in the bath is higher or lower than the set hot water temperature. It is intended to provide a bath kettle with a water heater that automatically controls the desired hot water temperature.

Means for Solving the Problems In order to solve the above problems, the bath kettle with a water heater of the present invention, in addition to the conventional structure, is branched from the water circuit of the water heater to supply water to the bath. A water passage and a solenoid valve for water supply are provided in the water passage.

Effect of the Invention With the above-described configuration, when the hot water temperature in the bath is higher than the set hot water temperature of the remote control device, the automatic water supply switch of the remote control device is turned "ON" to open the water solenoid valve. By supplying water until the hot water temperature drops to the set hot water temperature, it is possible to perform automatic temperature control in the direction of lowering the hot water temperature of the bath, which has been a conventional problem.

Example A bathtub with a water heater according to an example of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall structure of a bath kettle with a water heater according to an embodiment of the present invention. In FIG. 1, 1 is a remote control device for kitchens, 2 is a remote control device for bathrooms, which are provided with automatic operation switches 1a and 2a and a hot water temperature setting switch 1b for controlling bath water temperature. A water level sensor 3 for detecting the water level of the bath tank 6, a thermistor 5 for detecting the hot water temperature, and a circulation pump 4 for circulating and stirring the hot water of the bath tank 6 are attached to the bath heat exchanger 7. Reference numeral 8 is a bath main burner. Reference numeral 10 denotes a water supply circuit of a water heater, which is provided with an instantaneous heating hot water supply heat exchanger 14 and a hot water burner 15 for burning fuel to supply hot water. 11 is a water pipe, which is the water supply circuit of the water heater.
It is further branched and connected to the water supply solenoid valve 12. The water from the water supply solenoid valve 12 is received by the hopper 13 as an atmosphere opening device, cut off from the hot water of the bath tank 6 and supplied to the bath tank 6 through the bath heat exchanger 7. An electric control unit 9 is electrically connected to the remote operation devices 1 and 2, the water level sensor 3, the circulation pump 4, the thermistor 5, the bath main burner 8 and the water supply solenoid valve.

The operation of the bath kettle with a water heater configured as described above will be described below with reference to FIGS. 1 and 2. Second
The figure shows the operation of the automatic control of the bath water and the change in the bath temperature according to the present invention.

First, set the desired hot water temperature with the remote control device 1 and turn on the automatic operation switch 1a or 2a (Fig. 2),
After the water level sensor 3 detects that the bath 6 contains hot water, the circulation pump 4 starts operating, and the hot water of the bath 6 is circulated and stirred with the bath heat exchanger 7. The temperature of the agitated hot water is detected by the thermistor 5, and when the hot water temperature is lower than the set hot water temperature, the bath main burner 8 starts to burn in order to approach the set hot water temperature, and the hot water temperature starts to rise (see FIG. 2). ). When the hot water temperature of the circulating bath 6 reaches the set hot water temperature, the combustion of the bath main burner 8 is stopped (Fig. 2).

Next, set the hot water temperature lower than the hot water temperature of the bath 6 and turn the automatic operation switch 1a or 2a of the remote control device to "ON" (Fig. 2). After the detection, the circulation pump 4 starts operating. When the temperature of the agitated hot water is detected by the thermistor 5 and it is detected by the electric control unit 9 that the hot water temperature is higher than the set hot water temperature, the bath main burner 8 is stopped and the water supply solenoid valve 12 is opened, and the bath heat is discharged from the hopper 13. Water passes through the exchanger 7 and mixes with the water in the bath 6 so that the temperature of the bath 6 begins to drop, and when the temperature drops to the set temperature, the solenoid valve for water supply 12
Closes.

EFFECTS OF THE INVENTION As described above, the present invention is provided with a water passage for supplying water into the bath and a solenoid valve for water supply, in addition to the conventional hot water supply function, recharging and automatic heat retention functions, and the bath water temperature is set to the set temperature. If the temperature is higher, the water supply solenoid valve is opened to supply water into the bath so that the bath temperature set by the remote control device can be automatically obtained even when the bath bath temperature is lowered. It is possible to obtain a wide range of excellent automatic temperature control characteristics.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bath kettle with a water heater in an embodiment of the present invention, FIG. 2 is an automatic control transition diagram of bath bath water temperature in the configuration of FIG. 1, and FIG. 3 is a conventional bath with a water heater. FIG. 4 is an overall configuration diagram of the kettle, and FIG. 4 is an automatic control transition diagram of bath bath temperature in the configuration of FIG. 3 ... Water level sensor, 4 ... Circulation pump, 5 ... Thermistor, 5 ... Bath, 7 ... Bath heat exchanger, 8 ... Bath main burner, 11 ... Water pipe, 12 ... Water supply electromagnetic valve.

Claims (1)

[Claims] 1. A hot water supply heat exchanger for burning fuel to supply hot water, a hot water supply burner, and a circulation pump for circulating hot water in a bath.
A bath heat exchanger for heating the hot water in the bath circulated by the circulation pump, a bath main burner, a thermistor for detecting the temperature of the circulated hot water, a water level sensor for detecting the water level in the bath, and a bath A water passage for supplying water and hot water through the atmosphere opening device, a water supply solenoid valve and a hot water supply solenoid valve,
When the hot water temperature detected by the thermistor is higher than the set hot water temperature, a bath kettle with a water heater having control means for opening the water feed solenoid valve to supply water into the bath and lowering the bath hot water temperature.