JPH0352307Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot water tank for a hot water flush toilet, and provides a hot water tank for a hot water flush toilet in which hot water at a constant temperature is supplied to a nozzle without a drop in water temperature during flushing. With the goal.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The hot water tank of the hot water flush toilet of the present invention (hereinafter referred to as the hot water tank of the present invention) will be described below according to an embodiment shown in the drawings.

FIG. 1 shows an example of a cleaning device in which the hot water tank of the present invention is used, and the cleaning device 2 is installed at the rear of a hot water flushing toilet 1.

The cleaning device 2 of the present invention supplies hot water in a hot water tank 4 to a cylinder 7 using water supply pressure from a water supply source such as a water supply pump 3, and uses the water pressure to spray water from a nozzle 9 at the tip of an extending plunger 8 as a fountain.

FIG. 2 shows details of the hot water tank 4 of the present invention,
The hot water tank 4 has an upper chamber 15 and a lower chamber 16 separated by a partition plate 11.

The partition plate 11 has a plurality of small holes 12 as shown in FIG.
is provided.

Returning to FIG. 2, the upper and lower parts of the upper chamber 15 are connected by a water channel 17 driven by a stirring pump 18.

Further, a temperature sensing element 14 such as a thermistor is attached to the upper part of the upper chamber 15.

Further, a hot water inlet 19 communicating with the nozzle 9 is provided at the upper part of the upper chamber 15 .

Next, a heater 5 is installed in the lower chamber 16, and a water supply port 10 is connected to a water supply source via a water supply channel 6.
opens.

In the illustrated embodiment, the water supply pump 3 serves as the water supply source.
The water supply pump 3 is connected to a power source 21 via a cleaning switch 20 that is opened and closed by the user.

FIG. 4 shows an example of an electric circuit for using the hot water tank of the present invention shown in the above embodiments.

That is, a comparison circuit 31 is provided, which has the temperature detection element 14 connected to its input terminal, compares the output of the temperature detection element 14 with a set value, and outputs the result as a signal.

The stirring pump 18 and the heater 5 are connected to the power source 21 through a normally open switch 32 and a normally open switch 33, respectively.

On the other hand, a timer 30 is provided, which closes a switch 33 when the comparison circuit 31 outputs a signal, and opens a switch 32 after a certain period of time when the signal stops.

The switch 33 is directly connected to the comparator circuit 31 and is closed when a signal is output from the comparator circuit 31.

A specific example of the electric circuit shown in block form in FIG. 4 is as shown in FIG.

That is, the connection point between the temperature sensing element 14 and the resistor R ₁ and the connection point between the resistor R ₂ and the resistor R ₃ are connected to the input terminal of a comparator 24 that compares these voltages.

The output terminal of comparator 24 is led to the input terminal of transistor 25, which is used as a switch for relay 26.

On the other hand, the stirring pump 18 is connected to a power source 21 via a switching transistor 29.

The input terminal of the transistor 29 is connected to the power source 21 via a timer circuit 30 and a switch 27 consisting of a capacitor and a resistor.

On the other hand, the heater 5 is connected to the power supply 2 via the switch 33.
Connected to 1.

Switches 27 and 33 are normally open switches that are closed when the relay 26 is energized.

The hot water tank of the present invention using the above electric circuit operates as follows.

That is, hot water is stored in the hot water tank 4, and the temperature of the water is detected by the temperature detection element 14.

That is, the comparison circuit 31 compares the hot water temperature detected by the temperature detection element 14 with the set value, and when the former becomes lower, outputs a signal to close the switch 33 and also closes the switch 32 via the timer 30.

As a result, the stirring pump 18 is driven and the heater 5 is energized.

Therefore, the heater 5 is connected to the lower chamber 16 of the hot water tank 4.
Heat the hot water inside.

The heated hot water in the lower chamber 16 quietly flows into the upper chamber 15 through the small hole 12 and raises the temperature of the water in the lower part of the upper chamber 15.

However, since the stirring pump 18 is being driven, the high temperature hot water in the lower part of the upper chamber 15 is sent to the upper part through the water channel 17.

That is, the upper chamber 15 is stirred to equalize the upper and lower hot water temperatures, and the overall hot water temperature in the upper chamber 15 increases.

The rise in water temperature is detected by the temperature detection element 14, and when the temperature rises to a set value, the comparison circuit 31 stops the signal.

As a result, the switch 33 is immediately opened and the heater 5 is stopped.

On the other hand, the switch 32 remains closed for a certain period of time after the signal stops due to the timer circuit 30.

For this reason, the stirring pump 18 is kept in operation for a certain period of time to promote uniformity of the temperature of the hot water in the upper chamber 15.

As described above, the hot water in the upper chamber 15 of the hot water tank 4 is maintained at the set temperature without any vertical difference.

In this state, after the user relieves himself, he closes the cleaning switch 20 and drives the water pump 3.

As a result, water flows into the lower chamber 16 of the hot water tank 4 from the water supply port 10, and the hot water in the lower chamber 16 is sent from the water supply port 19 to the nozzle 9 by the water supply pressure and is ejected.

The water temperature in the lower chamber 16 decreases as the water flows into the lower chamber 16, but this low-temperature hot water quietly flows into the upper chamber 15 through the small hole 12.

Therefore, in the upper chamber 15, the water temperature decreases in the lower part, but does not decrease in the upper part.

Such a temperature gap between the upper and lower parts of the upper chamber 15 continues until the low-temperature hot water reaches the level of the temperature sensing element 14 and the stirring pump 18 is driven.

In other words, the temperature of the water in the fountain remains constant until the low-temperature hot water rises.

Here, since the capacity of the upper chamber 15 is adjusted to be sufficient for the normal cleaning time, the temperature of the water in the fountain will not drop until the cleaning is completed.

However, if the jetting continues for a long time, the low-temperature hot water in the lower chamber 16 will reach the hot water inlet 19 in the upper chamber 15, but this is rare.

However, it is desirable to make the user aware of such a drop in water temperature by means of an alarm lamp or the like.

The hot water tank of the hot water flushing toilet of the present invention has the following effects based on the configuration and operation shown in the above embodiments.

(1) The hot water tank of the present invention has the configuration described in the claims for utility model registration, and has an upper chamber and a lower chamber separated by a partition plate with a plurality of small holes, and a hot water inlet. The upper chamber is stirred by a stirring pump, and the heater is installed in the lower chamber, so hot water at a constant temperature is supplied to the nozzle without any drop in water temperature during cleaning.

(2) The hot water tank of the present invention has the same configuration as above, and in particular, the water supply port is provided in the lower chamber, so water flows into the lower chamber during cleaning, and also flows from the lower chamber to the upper chamber through small holes in the partition plate. Because the water flows in quietly, the water temperature at the top of the upper chamber does not drop, and hot water at a constant temperature is supplied to the nozzle.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram showing an example of a cleaning device in which the hot water tank of the present invention is used, Fig. 2 is a cross-sectional front view of the hot water tank of the present invention, and Fig. 3 is a plan view of a part of the partition plate used in the hot water tank. 4 is a block diagram showing an example of an electric circuit for using the same hot water tank, and FIG. 5 is an electric circuit diagram as a specific example of FIG. 4. 1: Hot water flush toilet, 2: Cleaning device, 3: Water pump, 4: Hot water tank, 5: Heater, 6: Water supply channel, 7: Cylinder, 8: Plunger, 9:
Nozzle, 10: Water supply port, 11: Partition plate, 12: Small hole, 14: Temperature sensing element, 15: Upper chamber, 16: Lower chamber, 17: Water channel, 18: Stirring pump, 19: Water supply port, 20: Cleaning Switch, 21: Power supply, 24: Comparator, 25: Transistor, 26: Relay, 2
7: Switch, 29: Transistor, 30: Timer circuit, 31: Comparison circuit, 32: Switch,
33: Switch.

Claims (1)

[Scope of utility model registration request] An upper chamber and a lower chamber separated by a partition plate, a plurality of small holes provided in the partition plate, a conduit connecting the upper and lower parts of the upper chamber and equipped with a stirring pump, and an upper chamber installed in the upper chamber. The installed temperature sensing element, the hot water supply port installed in the upper part of the upper chamber and communicating with a nozzle that spouts hot water for local cleaning, the heater installed in the lower chamber, and the lower chamber installed in communication with a water supply source. A hot water tank for a hot water flush toilet consisting of a water supply port.