JPH0712462Y2 - Hot water tank for hot water washer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hot water tank of a hot water washer that ejects hot water for cleaning a local area after use.

(Prior Art) Conventionally, a hot water washing type flush toilet 21 as shown in FIG. 3 is supplied to the washing nozzle 22 and a washing nozzle 22 for ejecting hot water for washing a local part after use. Hot water tank 23 for storing hot water as shown in FIG. 4 in detail.
And are provided.

The hot water tank 23 is equipped with an electric heater 25 for heating the water supplied from the low tank 24 into hot water, and a temperature control thermoswitch 26 for controlling the temperature of the hot water, and also controls the temperature. The upper end of the thermo switch 26 is a hot water tank
A non-returning type safety thermo-switch 27 is attached to the part protruding from the upper surface of 23.

(Problems to be solved by the invention) In the state where the above conventional warm water flush toilet bowl 21 is installed in the toilet and water is first supplied from the low tank 24 to the warm water tank 23, this water is first heated to warm water. The fifth
The temperature rise characteristic is as shown in the figure.

That is, when water is first supplied from the low tank 24 to the hot water tank 23, when the temperature of the temperature control thermoswitch 26 reaches about 38 degrees in the process of first overheating this water, the electric heater
Although the power supply to 25 is cut off, the water temperature in the uppermost layer of the hot water tank 23 becomes extremely high at 60 degrees because the water is not circulated yet. Therefore, for example, 54 degrees is set as the upper limit temperature. The non-reset type safety thermo-switch 27 often operates, and if the safety thermo-switch 27 operates, after removing the flush toilet bowl 21 installed carefully, disassembling, and replacing the safety thermo-switch 27 , There was a problem that the flush toilet 21 had to be installed again.

By the way, when the temperature of the temperature control thermo switch 26 reaches about 38 degrees and the electric heater 25 is de-energized, the hot water tank 3
The temperature in the lower layer of the water supplied to the
Even though the water temperature of the uppermost part of the is extremely high at 60 degrees, it is only 28
It only happens once.

Therefore, conventionally, as disclosed in Japanese Patent Laid-Open No. 61-101746, there is a means for making the shape of the electric heater complicated so as to make the hot water temperature of the hot water tank uniform, but the shape of the electric heater is complicated. Therefore, there is a problem that the productivity is low and the cost is high.

Therefore, in the present invention, in order to solve the above-mentioned conventional problems, in the tank main body, a ceiling portion higher than the ceiling portion to which the non-reset type safety thermoswitch is attached is formed
When water is first supplied to the hot water tank from the outside, when this water is first overheated to become hot water, the hot water tank with a safety thermo-switch is installed by letting the hot water of high temperature escape to this high ceiling part. The technical problem to be solved is to prevent the hot water temperature of the low ceiling part from rising to a temperature at which the safety thermoswitch is activated.

(Means for Solving the Problem) Technical means for solving the above-mentioned problems include an electric heater for heating a hot water tank of a hot water washer to a tank body from the outside, and the hot water. And the temperature of the hot water reaches a second set temperature lower than the first set temperature when the temperature of the hot water rises to the second set temperature. At this time, a non-reset type safety thermoswitch for shutting off the power supply path to the electric heater and a temperature control thermoswitch for controlling the temperature of the hot water to a predetermined appropriate temperature lower than the second set temperature are provided. In addition, the upper part of the tank main body is formed into a high ceiling portion and a low ceiling portion, and while the thermoswitch is attached to the high ceiling portion, the safety thermoswitch is attached to the low ceiling portion. And.

(Operation) According to the hot water tank of the hot water washer having the above-mentioned configuration, when the water is first supplied to the hot water tank from the outside by first heating the water with the electric heater and turning it into hot water, the circulation of the hot water is first caused. Since there is no hot water, the heated hot water rises, and the hot water near the high ceiling of the tank body becomes hotter, while the hot water temperature near the outlet of the hot water supplied from the hot water tank to the outside is low, and The temperature of the hot water becomes an intermediate temperature between the two. Therefore, when the temperature of the hot water near the high ceiling reaches the first set temperature in the process of heating the hot water to an appropriate temperature by the temperature adjustment action of the temperature control thermo switch, the thermostat installed on the high ceiling is installed. Since the switch operates and the electric heater is de-energized, the rise of the hot water temperature is stopped before reaching the second set temperature at which the safety thermo switch attached to the low ceiling operates.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a warm water tank 1 attached to a warm water flush type flush toilet 21 as shown in FIG.

In this hot water tank 1, the upper end of a tank body 2 is formed into a low ceiling portion 3 and a high ceiling portion 4, and the low ceiling portion 3 is supplied with water supplied from a raw tank or the like through a water supply pipe 5. When heated by the heater 6, the operating temperature is, for example,
A non-reset safety thermostat 7 is installed to prevent overheating of hot water set at 54 degrees. On the other hand, in the high ceiling part 4, when the water is first supplied to the hot water tank 1 and the water is first heated by the electric heater 6 to be hot water, the temperature of the hot water heated by the electric heater 6 rises, When the hot water temperature of the high ceiling part 4 reaches, for example, 65 degrees, the electric heater 6
Automatic reset thermostat 8 to stop the energization of
Is attached. The set temperature of the automatic reset type thermostat 8 is the same as that of the non-reset type safety thermostat 7.
Set the hot water temperature of the low ceiling part 3 where is attached to the temperature that can stop the energization of the electric heater 6 so as not to reach 54 degrees at which the non-reset type safety thermostat 7 operates, that is, 65 degrees It was done.

Further, when the water in the hot water tank 1 is heated by the electric heater 6 to be hot water, a temperature control thermostat 9 for adjusting the temperature of the hot water to 40 ° ± 2 ° is provided at the center of the hot water tank 1. ing. Temperature control with the temperature control thermostat 9 above 40
The temperature of ± 2 degrees is an appropriate temperature for washing hot water, and is a temperature that prevents the temperature of the hot water near the low ceiling portion 3 from reaching 54 degrees for operating the non-reset type safety thermostat 7.

Reference numeral 10 is a vacuum breaker for letting steam escape to the outside of the hot water tank 1, and 11 is a float switch for limiting the amount of water supplied to the hot water tank 1 to a predetermined amount. 12 is a flush toilet of a warm water washing type as shown in FIG. 3 for warm water heated by the warm water tank 1 to an appropriate temperature.
This is a pipe when supplying to the cleaning nozzle 22 of 21.

In the hot water tank 1 configured as described above, when the water is first supplied to the hot water tank 1 from the low tank or the like and the water is first heated by the electric heater 6 to be hot water, there is no water circulation, The hot water whose temperature has risen rises to the high ceiling portion 4 and stays there. Then, the temperature control thermostat 9 provided at the center of the hot water tank 1 operates at about 40 degrees ± 2
Whenever the hot water of the intermediate layer is heated, the energization of the electric heater 6 is temporarily stopped. In this state, the hot water temperature near the low ceiling part 3 to which the non-recoverable safety thermostat 7 is attached does not reach the set temperature of 54 degrees at which the non-recoverable safety thermostat 7 operates. This is because all the hot water of 54 degrees or more rises and stays in the high ceiling portion 4. If the hot water near the high ceiling 4 reaches 65 degrees before the temperature control thermostat 9 is activated, the automatic resetting thermostat 8 is activated and the electric heater 6 is de-energized. Therefore, the operation of the non-reset type safety thermostat 7 can be avoided except when some failure occurs in the temperature control mechanism.

FIG. 2 shows a heating circuit for heating the water in the hot water tank 1 to hot water.

As shown in the figure, the safety thermostat 7, the thermostat 8 on the high ceiling, and the temperature control thermostat 9 are connected in series to the electric heater 6 and are connected to each other via the main relay contact 13.
It is connected to the leak prevention plug 14 of the bolt. Therefore,
Electric heater 6 regardless of whether safety thermostat 7, high ceiling thermostat 8 or temperature control thermostat 9 is activated
Is turned off. And the high ceiling thermostat
8, and the temperature control thermostat 9 opens the internal contact when the temperature of the hot water near the temperature reaches the set temperature, and automatically closes the internal contact when the temperature of the hot water drops below the set temperature.
However, in the case of the safety thermostat 7, if the internal contact or the internal fuse opens when the temperature of the hot water in the vicinity reaches the set temperature, for safety, this internal contact or the internal fuse will not automatically return. Absent.

As described above, according to the present invention, when the water supplied from the outside to the hot water tank is heated by the electric heater for the first time, the high temperature hot water rises to the high ceiling portion and stays there. The temperature of the hot water near the safety thermo-switch attached to the unit does not rise to the temperature at which the safety thermo-switch is activated, and the temperature of the thermo-regulating thermo switch regulates the temperature of the hot water supplied to the outside. Since it is heated, it prevents the safety thermo-switch from operating, and eliminates the problem of reattaching the flush toilet as in the conventional case when using the hot water tank of the present invention for the flush toilet, for example. You can

[Brief description of drawings]

FIG. 1 is a sectional view of a hot water tank according to an embodiment of the present invention, and FIG.
FIG. 4 is an electric circuit diagram thereof, FIG. 3 is a sectional view of a conventional flush toilet, FIG. 4 is a partial detailed view of FIG. 3, and FIG. 5 is a hot water temperature characteristic diagram of a hot water tank. 1 ... Warm water tank, 2 ... Tank main body 3 ... Low ceiling part, 4 ... High ceiling part 6 ... Electric heater 7 ... Safety thermostat 8 ... Thermostat 9 ... Temperature control thermostat

Claims (1)

[Scope of utility model registration request] 1. An electric heater for turning water supplied from the outside into a tank main body into warm water, and a reset for cutting off a power supply path to the electric heater when the temperature of the hot water rises to a first set temperature. Type thermo switch, a non-reset type safety thermo switch for shutting off a power supply path to the electric heater when the temperature of the hot water reaches a second set temperature lower than the first set temperature, and hot water A temperature control thermo switch for controlling the temperature to a predetermined suitable temperature lower than the second set temperature, and the upper part of the tank main body is formed with a high ceiling part and a low ceiling part. A hot water tank for a hot water washer, wherein the thermoswitch is attached to a high ceiling portion while the safety thermoswitch is attached to a low ceiling portion.