JP2663622B2 - Electric water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warming type electric water heater (generally called an electric jar pot or the like) used in ordinary households.

2. Description of the Related Art In recent years, a large number of insulated electric water heaters (hereinafter, referred to as electric jar pots) have been used in ordinary households. This electric jar pot automatically heats up after boiling when the user puts in water and applies AC power, and the user presses a knob provided on the lid of the electric jar pot to release hot water. Many types have been used, but recently an electric tapping type using a pump has been sold.

Problems to be Solved by the Invention In such a conventional electric jar pot, water or hot water can be supplied even before the water in the container boils. There was a problem that would be issued.

Immediately after boiling, water is still vigorously evaporating, and there is also a problem that when the water is to be poured due to the hermeticity of the container of the electric jar pot, the pressure in the container is excessively applied and the discharged water is scattered violently.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to surely discharge boiling water and prevent splashing of the discharged water.

Means for Solving the Problems In order to achieve the above object, the present invention takes an output of a boiling detecting means for detecting whether or not water in a container has boiled, and determines a predetermined value after the water in the container boils. A tapping prohibition means for outputting to the tapping means and prohibiting tapping until a predetermined time has elapsed.

Operation With the above-described configuration, in the electric water heater of the present invention, the user cannot tap the water until a predetermined time elapses after the water in the container has boiled. It is possible to prevent water from splashing due to tapping water immediately after boiling.

Embodiment An electric water heater according to one embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of an electric water heater according to one embodiment of the present invention. Reference numeral 1 denotes a container in which water is stored. 2
Heats the container 1 with a heating means. Numeral 3 indicates the temperature of water in the container 1 by detecting the temperature of the container 1 by a temperature detecting means. Reference numeral 4 denotes a boiling detecting means which receives the output of the temperature detecting means 3 as an input and detects whether or not the water in the container 1 has boiled. Numeral 5 is a tapping means used by a user for tapping water (hot water) in the container 1. Reference numeral 6 denotes a control unit which receives the outputs of the temperature detection unit 3 and the boiling detection unit 4 as inputs, controls the heating unit 2 and causes the water in the container 1 to boil and thereafter to maintain a constant temperature. Reference numeral 7 denotes a tapping prohibiting means which receives the output of the boiling detecting means 4 as an input, stops heating after the water in the container 1 has boiled, and outputs the tapping to the tapping means 5 until a predetermined time elapses, thereby prohibiting tapping.

Next, the operation of the electric water heater having such a configuration will be described with reference to FIG. FIG. 2 is a flowchart of the operation of the electric water heater of one embodiment of the present invention.

When the operation is started, first, at step 11, hot water is prohibited by the hot water prohibiting means 7. Next, in step 12, the water in the container 1 is heated by the heating means 2. Next, at step 13, the boiling detecting means 4 determines whether the water in the container 1 has boiled. If not, return to Step 12 and continue heating until boiling. If it is determined in step 13 that the water has boiled, the process proceeds to step 14 where heating is stopped, and after a certain period of time, the prohibition by the water tap prohibiting means 7 is released in step 15 to allow the user to tap water. Next, at step 16, the control means 6 keeps the temperature at a constant temperature. In step 17, the temperature of the water in the container 1 is monitored by the temperature detecting means 3. If the water temperature drops, for example, if the user replaces or adds water in the container 1, the process returns to step 11 again to prohibit tapping. And bring to a boil. In this way, in the electric water heater of this embodiment, hot water cannot be discharged until a certain time has elapsed after boiling.

Before step 11 or step 12 in FIG. 2, the temperature of the water in the container 1 may be detected by the temperature detecting means 3 and the temperature may be shifted to step 14 if the temperature is higher than a certain temperature.

Effects of the Invention As described above, according to the present invention, after water in a container boils, a user cannot take out hot water until a predetermined time has elapsed. Can be prevented from being used, and the hot water can be prevented from being scattered due to tapping immediately after boiling, and an electric water heater that is very useful in use can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electric water heater according to an embodiment of the present invention, and FIG. 2 is an operation flowchart of the electric water heater. 1 ... container, 2 ... heating means, 3 ... temperature detection means, 4
... Boiling detection means, 5 ... Hot water supply means, 6 ... Control means,
7. Hot water prohibition means.

Claims (1)

(57) [Claims] 1. A container for storing water, a heating unit for heating the container, a temperature detecting unit for detecting the temperature of water or the container, and an output of the temperature detecting unit as an input. Boiling detection means for detecting whether or not the water has boiled, and tapping means for tapping hot water in the container,
The output of the temperature detection means and the boiling detection means as input, the control means for controlling the heating means to boil water in the container and thereafter maintain a constant temperature, and the output of the boiling detection means as input, An electric water heater comprising a tapping prohibiting means for outputting to the tapping means and prohibiting tapping until a predetermined period of time elapses after the water in the tank boils.