JPS5947218B2 - Water heater with circulation pot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater with a circulating pot, which supplies hot water to a bathtub through the water heater and controls the hot water supply to the bathtub by an automatic water stop device that senses the water level in the bathtub and operates. The required amount of hot water is automatically supplied, and then the hot water in the bathtub can be heated appropriately using a circulating pot.

To explain this based on an embodiment shown in the drawings, 1 is a bathtub 2, a circulation section having a circulation pot 3 and a circulation burner 5 for heating the circulation pot 3, a heat exchanger 4 for hot water supply, and a circulation section for heating the circulation pot 3; A vessel body with a built-in hot water supply section having a hot water supply burner 6 that heats the heat exchanger 4, 7 is a water pipe connected to the hot water supply heat exchanger 4, and hot water can be supplied with the water outlet 8 at the tip facing the bathtub 1. That's how it is.

Reference numeral 9 denotes a water supply valve installed at an appropriate position in the water pipe 7, which communicates with the circulation pot 3 and is associated with a bathtub water level detection device 10 that senses the water level of the bathtub 1. When the water level of the bathtub 1 reaches a set water level, the water supply valve 9 closes automatically. It is designed to stop water.

That is, when the operating shaft 12 to which the cam 11 is fixed is rotated and the valve rod 14 of the water supply valve 9 is pressed against the spring 26 via the lever 13, it can move vertically and abuts the lever 13 from above. The locking piece 15 descends and locks onto the lever 13 with the locking protrusion 15', maintaining the open state to supply hot water to the bathtub 1, while communicating with the circulation pot 3 through the connecting pipe 16 to reduce pressure due to the water level of the bathtub 1. In the bathtub water level detection device 10, which detects the water pressure using a diaphragm 17, when the set water level is reached, the rod 25 rises in response to the diaphragm 17, and the locking piece 1
5 is pushed upward to release the locking between the locking piece 15 and the lever 13 and close the water supply valve 9.

The water supply valve 9, the bathtub water level detection device 10, and related devices constitute an automatic water shutoff device.

Also, the operating shaft 12 rotates 90 degrees from the stop position to open the water supply valve 9.
A manual opening stroke in which the lever is pressed and released by the cam 11, and a rotation operation (180° from the stop position) following this stroke releases the pressure on the lever by the cam, locks the lever with the locking piece, and opens the water supply valve. It is divided into self-employed work schedule and retained work schedule.

If water has already been supplied to the set water level during this automatic stroke, the locking piece 15 cannot be locked to the lever 13 because it is lifted by the rod 25.

Therefore, at this time, the water supply valve 9 will be closed.

Also, at the stop position, the water supply valve 9 is closed, but the locking piece 15
The release protrusion 27 provided on the upper surface of the cam 11 is used to lift the cam 11 so that the lever 13 does not engage the lever 13.

Reference numeral 18 denotes a hydraulic actuator provided in the water pipe 7, which senses water flow and opens a hot water supply gas valve 20 provided in a gas passage 19 leading to the hot water supply burner 6.

21 is a circulating gas valve provided in the gas passage 22 leading to the circulating burner 5, 23 is a pilot burner, and 24 is a pilot gas valve.

Although this embodiment is of the first stop type as shown in Fig. 1, the water supply valve is provided upstream of the water pressure actuation device 18 and the water pressure actuation device is of a type that detects water pressure as shown in Fig. 2. It can also be used as a stop-off type water heater).

The present invention has the above configuration, and when the operating shaft 12 is rotated 180 degrees to open the water supply valve 9, the locking piece 15 locks to the lever 13 by the locking protrusion 15' at a stage midway through the rotation, and water is supplied. The valve 9 is held in an open state, and upon sensing the flow of water, the hydraulic actuator 18 opens the hot water supply gas valve 20 to open the hot water supply burner 6.
The hot water supply heat exchanger 4 is heated to supply hot water to the bathtub 1.

When the water level of the bathtub 1 reaches the set water level, the rod 25 connected to the diaphragm 17 pushes up the locking piece 15 and the lever 1
Release the lock with 3.

Therefore, the water supply valve 9 is closed by the closing spring 26 to stop supplying hot water.

If the hot water supply temperature has not reached the appropriate temperature for bathing, the circulation gas valve 21 may be opened to reheat the hot water in the bathtub 1 by circulation heating using the circulation pot 3.

If you want to supply hot water regardless of the set water level, use operation axis 1.
2 to the 90° rotation position, the cam 11 is in the position where the lever 13 is pressed, and hot water can be supplied independently of the bathtub water level detection device 10.

Further, in the embodiments shown in FIGS. 1 and 2, if the amount of water changes due to fluctuations in water pressure or the like, the temperature of the hot water supply will change, making it difficult to maintain an appropriate temperature for bathing only by supplying hot water.

Therefore, as shown in FIG. 3, a temperature control valve 28 is installed in the water pipe 7.
If the hot water supply temperature drops, the valve hole 30 is narrowed by the heat sensitive part 29 to reduce the amount of water, and when the hot water temperature rises, the valve hole 30 is widened to increase the water amount, thereby making it possible to supply hot water at the set temperature.

Note that it is convenient that the set temperature of this temperature control valve 28 can be varied.

Figure 4 shows the case where it is applied to the main stop type.

In addition, as shown in FIG. 5, a proportional gas control valve 31 is provided in the gas passage 19, and a heat-sensitive part 32 arranged in the water pipe 7 detects the hot water temperature. When the temperature drops, the amount of gas may be increased to control the hot water temperature.

Figure 6 shows the case of the main stop type.

Furthermore, as shown in FIG. 12, the combustion time of the hot water supply burner 6 can be controlled by, for example, connecting a time switch 34 to the thermoelectric circuit of the thermoelectric safety valve 33 provided in the gas passage to close the gas passage after a set time. If a timer 35 is provided to control the temperature, the input can be kept constant, so the required amount of hot water to be supplied to the bathtub is constant, so if the combustion time is set appropriately according to the water temperature, hot water at the appropriate temperature for bathing can be obtained at the set water level. It can be done.

This is because if hot water is supplied at a temperature higher than the appropriate temperature, the burner will extinguish when the water reaches the set water level, and then the water will be diluted with water until the set water level is reached, thus preventing overboiling.

Note that if hot water is supplied at a temperature lower than the appropriate temperature, reheating using a circulation pot is required, so in this case, it is desirable to supply hot water at least at a temperature higher than the appropriate temperature.

A high limit switch 36 is inserted into the thermoelectric circuit, or a water level switch (
Needless to say, empty heating of the circulation pot 3 can be prevented by inserting a holder (not shown).

As described above, the present invention is equipped with a circulation pot, a circulation burner, a heat exchanger for hot water supply, and a burner for hot water supply, and a water supply valve is provided in the water pipe, and a bathtub water level detection device is provided, and this bathtub water level detection device is used to supply water. In connection with the valve, the water supply valve automatically shuts off when the bathtub water level reaches the set water level, so hot water can be automatically supplied to the bathtub up to the set water level.

Moreover, if the water supply temperature is low, it is convenient to be able to reheat the water as needed using the circulating pot.

In addition, since all devices such as an automatic water supply device are built into the bathtub, there is no need to attach them to the bathtub, so they do not interfere with bathing or spoil the aesthetics.

Furthermore, if a heat-sensitive part is provided to detect the hot water supply temperature and the amount of water or gas is controlled in proportion to the hot water supply temperature, hot water can be supplied at an appropriate temperature for bathing, and the trouble of reheating or supplying water to lower the temperature can be saved.

Also, if you install a timer to control the burning time of the hot water bath so that the fire is extinguished after a certain period of time, if hot water is supplied at a temperature higher than the temperature suitable for bathing, even after the fire has been extinguished, only water will be supplied. When the water stops at the water level, it will reach the appropriate temperature, which has many excellent effects such as preventing overboiling.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram diagrammatically representing an embodiment of the present invention, Fig. 2 is an overall configuration diagram in the case of a stop type, and Fig. 3 is a temperature control valve installed to control water volume. Overall configuration diagram of the case,
Figure 4 is an overall configuration diagram showing the case of the main stop type, Figure 5 is an overall configuration diagram of the case where a gas control valve is provided to control the gas amount, and Figure 6 is the overall configuration diagram showing the case of the main stop type. A configuration diagram, FIG. 7 is a plan view of main parts showing a water supply valve, a bathtub water level detection device, and related devices, FIG. 8 is a view taken along the line A-A in FIG. 7, and FIG. 9 is a view taken along the line B-B in FIG. Fig. 10 is an explanatory diagram showing the operation mode of the operating shaft, Fig. 11 is a sectional view showing an example of a temperature control valve, and Fig. 12 is an overall configuration diagram showing an embodiment provided with a timer. be. 2...Water heater body, 3...Circulation pot, 4
... Heat exchanger for hot water supply, 5 ... Burner for circulation, 6 ... Burner for hot water supply, 7 ... Water pipe, 9 ...・Water supply valve, 10... Bathtub water level detection device, 28... Temperature control valve, 29...
...Heat-sensitive part, 31... Gas control valve, 32...
...Heat-sensitive part, 35...Timer.

Claims (1)

[Claims] 1 Built-in hot water supply section including a circulation pot, a circulation section having a circulation burner that heats the circulation pot, a hot water supply heat exchanger, and a hot water supply burner that heats the hot water heat exchanger, and A water supply valve is provided in a water pipe connected to the exchanger, and a lever that presses and opens the water supply valve against a spring through a valve rod, and a cam that presses the lever attached to an operating shaft by rotation of the operating shaft. a locking piece that is movable in the vertical direction and has a locking protrusion that contacts the lever from above and descends when the lever is pressed by a cam to lock and hold the lever in the water supply valve suppressed open state; and an operating shaft. A release protrusion provided on the top surface of the cam that lifts the locking piece at the stop position, a bathtub water level detection device that communicates with the circulation pot and detects the bathtub water level with a diaphragm, and a bathtub water level detection device that communicates with the circulation pot and detects the bathtub water level with a diaphragm. If so, provide a rod that responds to the diaphragm and presses the locking piece upward to release the lock between the locking protrusion and the lever.
A manual opening process in which the operating shaft is rotated from a stop position and a cam presses and opens the water supply valve via a lever;
A water heater with a circulation pot, characterized in that the process is divided into an automatic process in which the pressure on the lever by the cam is released by a rotating operation, the lever is locked by a locking piece, and the water supply valve is held open.