JPH0316535A - Electric water heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric water heater for boiling water and keeping it warm in general households.

Conventional technology Conventionally, automatic water heaters that are grounded for commercial use dispense a fixed amount of water into a container of a fixed capacity, such as a built-in standing cup. Even if you used a cup other than the one above to dispense hot water, there was a saucer at the outlet so that the overflowing water would flow to a designated place, so you wouldn't get the floor wet.

Problems to be Solved by the Invention However, in electric water heaters used in general households, the capacity of the container into which water is poured is not constant;
There is no saucer to catch overflowing water, so when you try to automatically dispense a set amount of water, if the capacity of the water container is less than the set amount, the dispensed water will overflow. ,floor. There was a problem with getting the tatami mats wet.

The present invention solves these problems by providing an easy-to-use electric water heater that can stop dispensing hot water if hot water overflows from a container such as a bowl or cup while dispensing a preset amount of hot water. The purpose is to provide

Means for Solving the Problems In order to solve the above problems, the electric water heater of the present invention has a hot water outlet means for discharging water in a container to the outside, and a means for detecting hot water overflowing from a container such as a cup or a bowl. The hot water supply system is composed of an overflow detection means for detecting water overflow, and a hot water supply control means for controlling hot water supply based on the output of the overflow detection means.

Effects According to the above structure, it is possible to detect that hot water overflows from a container such as a cup or bowl during hot water dispensing, and to control the energization of the hot water dispensing means, even when the amount of hot water dispensed is less than the set amount.
It is possible to stop the hot water supply.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

The figure is a configuration diagram showing an embodiment of the present invention, in which 1 is a bottomed cylindrical container, 2 is a heater that heats the water contained in the container 1, and 3 is a hot water tap that discharges the water in the container 1. It is a means. 4 is a hot water supply amount setting means for setting an arbitrary amount of hot water, 5 is a hot water switch for automatically dispensing a set amount of hot water, and 6 is a hot water dispensing switch for automatically dispensing hot water in a set amount; A hot water amount detection means 7 detects the amount of hot water, and a hot water amount comparison means 7 compares the data of the hot water amount setting 1,000 steps 4 and the output of the 1,000 steps detecting the amount of hot water 6. Reference numeral 8 is an overflow detection means provided on a plate that is located directly below the discharge port and on which containers such as cups and bowls are placed, and 9 is an overflow detection means 8 and 2 of the hot water amount comparison 7 and overflow detection means 8.
This is a hot water tap control means that controls three hot water taps based on one output.

The hot water output amount detection stage 6 connects a water tube wrapped with aluminum foil 10b around a glass tube 10a to the bottom and top of the container 1 using rubber tubes 10c and 10d.
9b as two electrodes, a capacitance detection unit 10 that detects the capacitance generated through water between the container 1 and the water pipe, and c-f that converts the detected capacitance into a signal of a corresponding frequency.
It is constituted by a converter 11 and a hot water amount detection means 12 that detects the hot water amount based on the output of the cf converter l1. When there is water in the container 1, the height of the water surface is equal to the height of the water surface in the glass tube 10a, and the aluminum foil 1
0b is wound, the relative dielectric constant is different between the part where water is present and the part where it is not, so the capacitance sensing part 10
The capacitance detected is a value proportional to the amount of water in the container 1. Moreover, the period T of the output signal of the c-f converter 11 is
It is a c-f converter with a characteristic proportional to the capacitance C, and by measuring the period T of the output signal, the amount of water in the container I can be detected. When the hot water tap switch 5 is operated, the hot water output amount calculation stage 12 first stores the water amount at the start of hot water tap from the output of the cf converter 11. Thereafter, the difference between the water amount data output from the c-f converter 11 at a predetermined period and the stored water amount data at the start of hot water dispensing is determined and output as the amount of hot water dispensed.

After setting an arbitrary amount using the hot water amount setting means 4, when the hot water supply switch 5 is operated to start dispensing the set amount of hot water, the hot water amount comparison 7 will compare the water amount set by the hot water amount setting means 4 with the hot water output. The hot water output control device compares the amount of hot water required by the detection means, and sends a signal to continue hot water dispensing if the hot water amount is less than the set amount, and a signal to stop hot water dispensing when the hot water amount exceeds the set amount. Output to means 9.

The overflow detection means 8 consists of two electrodes 8a.
8b, and detects overflow by energizing when water overflowing from a container such as a cup or bowl enters the gap between two electrodes.

If water does not overflow from a container such as a cup or a bowl, the hot water output control 1000 steps 9 controls the hot water output 3 according to the output of the hot water amount comparison means 7, so that the amount of hot water dispensed is less than the set amount. If the amount exceeds the set amount, the hot water will continue to be dispensed. On the other hand, when the overflow detection stage 7 detects that water has overflowed during hot water dispensing, the hot water tap control control stage 9 stops driving the hot water tapping stage 3 regardless of the output of the hot water comparison stage 7.

As a result, even if the amount of hot water dispensed is less than the set amount, the dispensing of hot water can be automatically stopped if water overflows from a container such as a cup or bowl.

Effects of the Invention As described above, when dispensing an arbitrarily set amount of hot water, the dispensing of hot water is stopped when it is detected that the hot water has overflowed from a container such as a cup. It is possible to prevent hot water from reaching a certain amount and improve reliability.

[Brief explanation of the drawing]

The figure is a block diagram of an electric water heater showing one embodiment of the present invention. 3... Hot water supply means, 4... Hot water supply amount setting means, 5... Hot water supply switch, 6... Hot water supply amount detection means, 7...・Means for comparing the amount of hot water, 8...
. . . Overflow detection means, 9 . . . Hot water supply control means.

Claims (1)

[Claims] A cylindrical container with a bottom, a heater that heats the water contained in the container, and a hot water outlet that discharges the water in the container to the outside.
A hot water supply amount setting means for setting the amount of hot water to be discharged, a hot water supply switch that starts dispensing the set amount of hot water, a hot water supply amount detection means for detecting the amount of hot water discharged after the start of discharging, and an output of the hot water supply amount detection means. A hot water supply amount comparison means that compares the data of the hot water supply amount setting means, an overflow detection means that detects overflowing of water discharged from a container during pouring, and an output of the hot water supply amount comparison means and the overflow detection means. An electric water heater consisting of a hot water output control means for controlling the means.