JPH0233080Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention can automatically maintain the water stored in the bathtub at a predetermined temperature by supplying and mixing high-temperature water with the water stored in the bathtub. A water heater is installed in the bathtub, and a water heater is installed in the bathtub so that the water stored in the bathtub can be forcibly stirred to equalize the temperature while supplying high-temperature water, and to prevent the water jetting into the bathtub from becoming excessively hot. An ejector nozzle connected to the hot water supply pipe and spouting high-temperature water from the water heater is provided in the hot water supply pipe, and a suction pipe for sucking the water stored in the bathtub is connected to the hot water supply pipe. A sensor is connected to the part that receives the suction action of the jet from the ejector nozzle and detects the temperature of the water stored in the bathtub, and when the detected temperature of the sensor exceeds the set temperature, the high temperature water supply from the water heater is stopped. This invention relates to an improvement of a bath water heater equipped with a control device that automatically stops.

[Conventional technology]

Conventionally, in the above-mentioned bath water heater,
A sensor that detects the temperature of water stored in the bathtub was placed immersed in the bathtub (I cannot provide references).

[Problem that the invention attempts to solve]

However, although the water stored in the bathtub is heated as uniformly as possible by forcibly mixing the high temperature water and the water stored in the bathtub due to the suction action of the ejector,
It is impossible to raise the temperature of the water stored in the bathtub completely uniformly. In reality, the state of temperature rise of the water stored in the bathtub varies considerably depending on the location in the tank, so it is difficult to detect the temperature of the water using a hot water temperature sensor immersed in one location in the tank. The temperature status could not be determined accurately, and as a result, when automatic heating was performed, the overall boiling temperature of the water stored in the bathtub was different from the boiling temperature originally set by the operator. There were times when there was a big discrepancy.

The purpose of this invention is to improve the layout of the sensor for detecting hot water temperature by making effective use of the pipe structure.
In addition to making it possible to detect the overall temperature rise state of the water stored in the bathtub as accurately as possible when controlling the automatic stop of hot water supply, this improvement also ensures safety against dry heating without installing any additional equipment. The point is to be able to secure it.

[Means for solving problems]

The characteristic configuration of the present invention is that a water heater is connected to a bathtub by a hot water supply pipe from the water heater, an ejector nozzle for spouting high temperature water from the water heater is provided in the hot water pipe, and the hot water is stored in the bathtub. A sensor that connects a suction pipe for sucking water to a portion of the hot water supply pipe that receives a suction action by a jet from the ejector nozzle, and detects the temperature of the water stored in the bathtub, and the sensor. In a hot water supply device for a bath equipped with a control device that automatically stops the supply of high-temperature water from the water heater when the detected temperature of [Function] In other words, in the suction pipe where flow occurs in the pipe due to the suction action of the ejector, the water stored in the bathtub is continuously kept flowing throughout the hot water supply operation. The high-temperature water spouted from the ejector nozzle and the low-temperature water from the suction pipe are sufficiently forcibly mixed in the hot water supply pipe, and the mixed hot water is heated by the action of the ejector nozzle. It is ejected from the pipe into the bathtub, and the inside of the bathtub is forcibly stirred, causing
The temperature of the water stored in the bathtub is raised by supplying high-temperature water, and the temperature is equalized by forced stirring, and the hot water spouted into the bathtub is prevented from becoming excessively high temperature by mixing high-temperature water and low-temperature water in the hot water supply pipe. . In addition, only when the temperature detected by the sensor placed in the suction pipe exceeds the set value, the control device automatically stops the supply of high-temperature water from the water heater and automatically maintains the water stored in the bathtub at a predetermined temperature. Therefore, by detecting the temperature of the water stored in the bathtub that is continuously and mixed in the bathtub with a sensor attached to the suction pipe, the temperature of the water stored in the bathtub can be detected by using a sensor immersed in the bathtub as in the past. Compared to locally detecting the temperature of the water stored in the bathtub, the temperature increase state of the water stored in the bathtub as a whole can be detected more accurately.

Additionally, if hot water supply (high-temperature water supply) is started when the bathtub is empty, the water stored in the bathtub will not mix with the high-temperature water due to suction, and the suction pipe will be empty. , the temperature of the suction pipe near the connection with the hot water supply pipe increases rapidly due to heat conduction from the high temperature water.

Therefore, by placing the sensor attached to the suction pipe for automatic hot water supply stop control near the connection part of the suction pipe with the hot water supply pipe, the sensor can also be used as an abnormality detection sensor. In this state, an abnormal rise in the temperature of the suction pipe portion due to dry heating as described above can be detected at an early stage, and the hot water supply can be quickly stopped when the bathtub is empty by automatically stopping the hot water supply based on the detection.

[Effect of idea]

As a result of the above, when automatic heating is performed, the overall boiling temperature of the water stored in the bathtub can be accurately matched to the desired boiling temperature that was originally set by the operator, making it easier to take a bath. It has become extremely convenient for users because it eliminates the need to rekindle the fire or add water.

What's more, the ability to automatically stop dry heating at an early stage greatly improves safety.

Moreover, the improvement is extremely simple, just by changing the arrangement of the sensor, and there is no need for an additional structure to add an automatic stop function for dry firing, so it is extremely advantageous in terms of production and cost.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

A water heater 3 equipped with a finch tube type water heating heat exchanger 1 and a gas burner 2 therefor is provided, and a hot water supply pipe 4 of the water heater 3 is connected to a hot water discharge device 6 attached to a bathtub 5.

Then, the state of supplying hot water at a set temperature suitable for bathing and the state of supplying hot water at a set temperature are determined by fuel control of burner 2, water supply amount control, etc. based on feedback information from hot water temperature sensor 7. The control device 8 that appears selectively when the water heater 3
an operating switch and a switch for switching the control state of the control device 8 to either of the two states described above;
A remote controller 9 equipped with operating tools etc. for changing each set temperature is installed in the bathroom, and hot water filling operation is carried out to continuously supply hot water at a temperature suitable for bathing to the empty bathtub 5, The hot water supply device for a bath is configured to selectively perform a reheating operation in which water stored in a bathtub is heated by supplying hot water.

The hot water discharger 6 is partitioned into a lower discharge port 6A and an upper suction port 6B.
The hot water supply pipe 4 is connected to the lower discharge port 6A, and hot water or hot water supplied from the water heater 3 is discharged from the lower discharge port 6A toward the lower part of the bathtub 5.

In the hot water discharge device 6, the upper suction port 6B and a midway point of the hot water supply pipe 4 are connected to each other by a suction pipe 10, and as the hot water flows in the hot water supply pipe 4, the water stored in the bathtub is transferred to the upper suction port. An ejector 11 is installed in the hot water supply pipe 4, which acts to suck hot water from the hot water 6B into the hot water supply pipe 4 through the suction pipe 10,
By mixing the bathtub stored water sucked by the suction action of the ejector 11 and the hot water from the water heater 3 in the hot water supply pipe before discharging it into the bathtub 5 during the reheating operation, the bathtub can be heated by hot water supply. The temperature of the water stored inside the bathtub 5 can be heated as uniformly as possible within the bathtub 5, in other words, reheating can be performed efficiently while avoiding temperature unevenness in various parts of the bathtub as much as possible.

A hot water temperature detection sensor 12 is attached to the suction pipe line 10 near the connection point with the hot water supply pipe line 4, and when the temperature detected by the sensor 12 exceeds a set temperature, the water heater 3 is in a reheating operation state.
A reheating automatic stop control circuit 8A that automatically stops the hot water supply operation is incorporated into the controller 8, and when the temperature of the water stored in the bathtub reaches the desired boiling temperature preset by the remote controller 9. It is configured to automatically stop reheating hot water at .

In addition, temperature sensor 1 for automatic reheating stop control
2 is attached to the suction pipe 10 to detect the temperature of the bathtub stored water that is drawn into the suction pipe 10 continuously during reheating hot water supply and while the water stored in the bathtub is mixed with each other. This makes it possible to detect the overall temperature increase state of the water stored in the bathtub as accurately as possible, thereby reducing the error in the overall boiling temperature of the water stored in the bathtub.

Furthermore, by arranging the temperature sensor 12 near the connection point with the hot water supply pipe 4 in the suction pipe 10, if reheating operation is started by mistake while the bathtub is empty, the temperature sensor 12 will be removed from the supplied hot water. Abnormal temperature rise in the empty suction pipe 10 due to heat conduction is detected by a temperature sensor 12, and the automatic reheating stop control is performed based on the detection to automatically stop the empty heating at an early stage.

[Another example]

Next, another embodiment of the present invention will be described.

When providing the suction line 10, it is advantageous in terms of installation and construction if the suction line 10 is integrated into the hot water discharger 6 as a unit, but the suction line 10 may be constructed from a single external pipe.

Instead of sucking the water stored in the bathtub through the suction pipe 10, the system was attached to the suction pipe 10 for the main purpose of pre-mixing the high-temperature water for reheating from the water heater 3 with the water stored in the bathtub. The water stored in the bathtub may be sucked only for the purpose of detecting the temperature of the water by the temperature sensor 12.

The opening position of the suction pipe 10 relative to the bathtub 5 can be changed.

The water heater 3 may be of various types, such as an instantaneous water heater type or a boiler type, or may be a water heater exclusively for reheating.

The form of the heat source energy does not matter.

[Brief explanation of the drawing]

The drawing is a schematic overall structural diagram showing an embodiment of the present invention. 3... Water heater, 4... Hot water supply pipe, 5... Bathtub,
8...control device, 10...suction pipe, 11...ejector, 12...sensor.

Claims (1)

[Claims for Utility Model Registration] A water heater 3 is connected to the bathtub 5 by a hot water supply pipe 4 from the water heater 3, and an ejector nozzle 11 for spouting high temperature water from the water heater 3 is connected to the hot water pipe 4. A suction pipe 10 for sucking the water stored in the bathtub 5 is connected to a portion of the hot water supply pipe 4 that receives the suction action by the jet from the ejector nozzle 11, and A sensor 12 that detects the temperature of stored water, and the sensor 1
2 is a bath water heater equipped with a control device 8 that automatically stops the supply of high-temperature water from the water heater 3 when the detected temperature of the water heater 2 exceeds a set temperature, the suction pipe line 10 from the bathtub 5 to the ejector nozzle 11. A hot water supply device for a bath in which a sensor 12 for detecting the water temperature is arranged in a portion near the hot water supply pipe 4.