JPH0499531A - Electric hot-water heater - Google Patents

Abstract

PURPOSE:To obtain the feed water quantity to a pump corresponding thereto by selecting and operating plural changeover switches whose controlled variables are different. CONSTITUTION:In a main body l, a vessel 2 for storing hot water, a heater being a heating device, and a pump 5 for feeding hot water to a discharge port 9 are provided. A DC motor 4 drives the pump 5, and the speed of revolution is varied by a control circuit 8. On the upper face of the main body l, a cover 9 for pouring hot water is provided. On the front upper part of the main body l, a switch operating part (a) is provided. A switch 10 for a small quantity, a switch 11 for a middle quantity, and a switch 12 for a large quantity are provided with switches of a push-button type of the same shape for selecting the respective discharge quantities. Each switch 10-12 is connected to the control circuit 8, and by selecting each switch 11, 12 and 13, the control circuit 8 applies a determined voltage to a DC motor 4. The DC motor 4 drives the pump 5 by a prescribed applied voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric water heater that supplies hot water electrically or electromagnetically.

BACKGROUND OF THE INVENTION In recent years, pot-type electric water heaters that operate on a switch have become widely used as a means of pouring hot water into a container.

Conventionally, this type of electric water heater has generally had a configuration as shown in FIG.

As shown in the figure, inside the approximately cylindrical main body 1 are a container 2 for storing water, a heater 3 for heating the water, a DC motor 4 controlled by voltage, and a centrifugal motor connected to and driven by the DC motor 4. A discharge type pump 5 is provided, and water is supplied to the discharge port 9 by operation of the pump 5. The upper part of the main body 1 is equipped with a variable resistor 6 for adjusting the amount of water supplied by the pump 4. By turning a rotary knob 7, a change in the resistance of the variable resistor 5 is sent as a signal to the control circuit 8 to control the DC motor 4. The discharge amount of the pump 5 is controlled by changing the applied voltage and changing the rotation speed. Note that a lid 10 is provided on the top surface of the main body 1.

In the above configuration, the amount of hot water dispensed when pouring hot water into the container is adjusted by rotating the knob 7 to change the electric resistance of the variable resistor 6, which is detected by the control circuit 8, and is controlled by the DC motor 4. The number of revolutions of the pump 5 was controlled and adjusted by using the pump 5.

Problems to be Solved by the Invention In this conventional configuration, in order to adjust the amount of hot water dispensed, the relationship between the rotation angle of the knob 7 and the amount of hot water dispensed is based on experience, which can lead to operational errors when used for the first time or in a hurry. This caused hot water to overflow from the container and made it difficult to pour the appropriate amount.

The present invention solves the above problems, and aims to provide an electric water heater that is safe and easy to operate.

Means for Solving the Problems In order to achieve the above object, the present invention has a configuration in which the control of the amount of water fed by the pump is switched via a control circuit by a plurality of switches each controlling the amount of control.

Effects In the above-described configuration, the present invention selects and operates a plurality of changeover switches having different control amounts to obtain the amount of water sent to the pump according to the selected switch.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1, 2, and 3.

Note that the same components as in the conventional example will be described with the same reference numerals. As shown in FIG. 1, inside the substantially cylindrical main body 1,
A container 2 for storing hot water, a heater serving as a heating device, and a pump 5 for sending hot water to a discharge 09 are provided. 4 is pump 5
The rotation speed of the DC motor is changed by a control circuit 8. A lid 9 for pouring hot water is provided on the top surface of the main body 1. a is a switch operation part at the upper front of the main body 1, and there are push button type switch 10 for small quantity, switch 11 for medium quantity, and switch 12 for large quantity with the same shape to select the respective discharge amount. A switch is provided, and the switch is arranged in order according to the discharge amount. Each of the switches 10 to 12 is connected to a control circuit 8, and by selecting each switch 11, 12, 13, the control circuit 8 applies a determined voltage to the DC motor 4. The DC motor 4 drives the pump 5 with a constant applied voltage.

In Figure 2, the operation parts in part a of Figure 1 are divided according to the discharge amount, and the area of the operation part of the switch 14 for small quantities is made smaller, and the area of the operation part of the switch 15 for medium quantities is made smaller. In addition, the area of the operating section of the large quantity switch 16 is made small (and arranged in order of discharge quantity).

According to this configuration, during normal use, the switch 15 for medium volume with a large area of the operation part is used, and the switch 14 for small volume is used only when a small or large amount of discharge is required.
Alternatively, the large amount switch 16 will be operated.

In Figure 3, only the switch operation part in part a of Figure 1 is changed, and the area of the operation part of the switch 16 for small quantity is made smaller, and the area of the operation part of switch 17 for medium quantity and switch 18 for large quantity is successively reduced. are arranged in order of area, that is, in order of discharge amount.

According to the embodiment of the present invention, in order to obtain a desired discharge amount, the discharge amount can be selected visually and intuitively by changing the arrangement or area of the operating section of the switch according to the discharge amount. can.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, there is provided a main body having a container for storing hot water inside and a lid on the top, a heater for heating the hot water, and a water inlet from the container to the water inlet. An electric water heater that is easy to operate because it is equipped with a pump that introduces hot water, a control circuit for controlling the water flow rate of the pump, and a plurality of switches, and the plurality of switches are classified according to the water flow rate of the pump. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional external perspective view of an electric water heater showing a first embodiment of the present invention, FIG. 2 is a perspective view of an operating section showing a second embodiment of the invention, and FIG. FIG. 4 is a perspective view of the appearance of a conventional electric water heater, with a portion of it cut away. 1... Body, 2... Container, 3...
・Heater, 5...Pump, 8...Control circuit, 9...Discharge port, 11°12.13...
···switch. Name of agent: Patent attorney Shigetaka Awano and one other person Toshita Kaiku V number 3-m- and -da q---n Kokiguchi 11'+3-11 Sui Ichinochi

Claims (1)

[Claims] A main body having a container for storing hot water inside and a lid on the top, a heater for heating the hot water, a pump for guiding the hot water from the container to a discharge port, a control circuit for controlling the water amount of the pump, and a plurality of An electric water heater comprising a switch, the plurality of switches being classified into the pump according to the amount of water supplied.