JPS63214212A - Electric pot - 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 Industrial Application] The present invention relates to an electric water heater for heating and keeping a contained liquid warm.

[Conventional technology]

BACKGROUND ART Conventional electric water heaters with an electric hot water supply function employ a method in which air is pumped into a liquid container using an air pump, and the liquid in the container is drawn out of the container using the pressure.

As shown in FIG. 5, the electrical connection of such a conventional electric water heater generally includes a heating device section consisting of two heating elements 101 and 102 and controllers 103 and 104 for each of them; A motor 105 for driving an air pump is connected in parallel, and this motor 1
05 by closing its drive switch 106 [
Operation has started, and air can be pumped in and the liquid in the liquid container can be drawn out. The operation of the motor 105 can be started and stopped regardless of the state of the heating device section.

[Problem that the invention seeks to solve]

However, in such a conventionally configured electric water heater, the liquid in the container can always be drawn out by closing the independent motor drive switch, regardless of its heating state.

For this reason, for example, when boiling water, the water in the container is in a very active state when it is in a boiling state.At this point, if you close the switch and drive the motor to draw the hot water out of the container. There is a risk that hot water may splash out of the boiling water outlet, or it may gush out forcefully and hit the wall of the container, such as a cup, and the hot water may splash back and cause burns to the user or those around them. , it was dangerous.

In addition, since the liquid in the container can always be drawn out, malfunctions such as erroneously dispensing hot water may occur even when the liquid in the container has not reached the desired temperature, that is, at a low temperature.

Therefore, the purpose of the present invention is to eliminate the above-mentioned dangers, prevent malfunctions when the desired temperature is not reached, and enable the liquid in the container to be drawn out while always reaching and maintaining a constant temperature. Our goal is to provide a cool electric water heater.

[Means for solving problems]

The present invention includes a container that stores a liquid, a main heating element that heats the liquid in the container to a constant high temperature, an auxiliary heating element that keeps the heated liquid warm, and a liquid that is heated to a high temperature to the outside of the container. and an electric pump for drawing out the liquid, and the pump is not allowed to operate until the liquid is heated to the high constant temperature, and the liquid reaches the high constant temperature and enters a heat retention state. When it is an electric water heater that allows the operation of the above pump.

[Effect]

According to the water heater of the present invention, the electric pump cannot be operated while the main heating element is energized, that is, while the liquid is being heated for boiling water. Therefore, when the water in the container is boiling and active, it cannot be drawn out of the container.
Boiling water will not be drawn out of the vessel and splashed, causing burns. Furthermore, it is possible to prevent malfunctions in which the temperature of the liquid in the container does not reach a certain high temperature during boiling and the water is discharged in a cold or low-temperature state.

〔Example〕

An embodiment of the electric water heater of the present invention is shown in Figs. 1 to 4 below.
This will be explained with reference to the figures.

In FIGS. 3 and 4, reference numeral 1 denotes a main body of an electric water heater, and a container 2 containing liquid is housed in the main body 1. In addition, the upper end of the main body l is open, and there is a spout 3.
is fixed, and a hook 4 is integrally attached to the lower end.

Reference numeral 5 denotes a lid body that covers the spout 3 in an openable and closable manner, and the lid body 5 can be opened and closed with respect to the spout 3 by pressing a lock knob 6 provided at the front portion thereof. A steam lower is provided near the upper rear edge of the lid 5, which communicates with the interior of the container 2 so that the steam generated in the container 2 can be dissipated therefrom when overpressurized. .

A guide hole 8 is provided at the lower side of the container 2.
communicates with the suction port 11 of an electric pump 10 via a waterproof backing 9 made of silicone rubber or the like having a substantially 5-shape shape. The pump 10 is driven by a motor 12 and has the function of sucking the liquid in the container 2 and sending it out.
4, passes through a water pipe bushing 16 with a built-in outflow prevention valve 15, and is discharged from the discharge port 17 to the outside of the vessel.

There are insulating plates (not shown) on the top and bottom of the bottom of the liquid container 2.
A main heating element 18 and an auxiliary heating element 19, which are laminated together, are fixed in a compressed state by a heat diffusion plate 20 and a back plate 21 made of a metal with good thermal conductivity such as aluminum or steel.

22 is a first temperature regulator that controls opening and closing of the main heating element 18, 23 is a second temperature regulator that controls opening and closing of the auxiliary heating element 19, and 24 is a switch for opening and closing the motor 12. .

The electric circuit of the water heater constructed as described above is shown in FIGS. 1 and 2. When the container 2 is filled with water and heating is started and continued, the first temperature regulator 22 for the main heating element 18 is closed, as shown by the arrow, as shown in FIG. Current flows through the motor 12, and no current flows through the motor 12, and the motor switch 2
4 is closed, the motor 12 is not driven, and therefore the water in the container is not drawn out.

On the other hand, when the water in the container reaches a certain high temperature (for example, boiling start temperature), the first temperature regulator 22 opens and the current flows to the auxiliary heating element 19 and the motor 12 as shown in FIG. flows. The opening and closing of the auxiliary heating element 19 is performed by a second temperature regulator 20, which controls the temperature of the water in the container, that is, keeps it warm. At this time, there may be some changes in the voltage applied to both ends of the motor 12 depending on the opening/closing state of the second temperature regulator, but this does not affect operation, and the motor switch 24 can be operated at any time during the heat retention state. According to
The high temperature water (hot water) in the container 2 can be drawn out. In FIGS. 1 to 3, a lamp 25 indicates that water is being boiled, that is, water is being heated by the main heating element 18;
6 is a lamp that indicates the heat retention status, so lamp 2
While lamp 5 is on, liquid cannot be drawn out, and lamp 26 is on.
Liquid can be dispensed while the is lit.

〔Effect of the invention〕

As is clear from the above embodiments, in the electric water heater according to the present invention, the electric pump cannot be operated while boiling water, so the hot water in the container is still heated by the main heating element, boils, and moves actively. When the boiling water is in the boiling state, the hot water cannot be drawn out of the vessel, and therefore the boiling water will not be drawn out and splashed, causing burns. Furthermore, since water that has not yet reached a sufficiently high temperature cannot be discharged while boiling continues, it is possible to prevent malfunctions in which cold water or low-temperature hot water is discharged. Therefore, a water heater with excellent safety and operability can be provided.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram of an embodiment of the present invention in a heat-retaining state;
Fig. 2 is an electric circuit diagram in a water boiling state, Fig. 3 is a perspective view of an embodiment of the water heater of the present invention, Fig. 4 is a sectional view thereof, and Fig. 5 is an electric circuit diagram of a conventional electric water heater. It is. 2-m-liquid container, 18-m-main heating element, 19--auxiliary heating element, 10-m-pump, 12--motor 12
4-m-motor switch. Patent applicant: Matsushita Electric Industrial Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A container that holds a liquid, a main heating element that heats the liquid in the container to a constant high temperature, an auxiliary heating element that keeps the heated liquid warm, and a liquid that leads the liquid inside the container to the outside of the container. and an electric pump for heating the liquid, and the pump cannot be operated until the liquid is heated to the high constant temperature, and when the liquid reaches the high constant temperature and enters the heat retention state. An electric water heater characterized in that the pump described above can be operated.