JPH02195913A - Electric water boiler - Google Patents

Abstract

PURPOSE:To obtain a high temperature for a small quantity of hot water and reduce the smell of bleaching powder by providing a transfer section and providing a process to operate a valve and communicate the passage on the upper side of a container to the lower section of the container and guide a liquid to the outside of the container in the process to boil the liquid or the heat reserving process. CONSTITUTION:The packing 20 of a transfer section 10 closes the third opening section 24 and communicates the first water pipe 11 and the second water pipe 12 under the ordinary state, when a pump 6 is operated, the liquid in a container 2 is guided to the outside of the container 2 through a guide port 14. When a solenoid 26 is excited, the packing 20 closes the second opening section 23 and communicates the first water pipe 11 and the third water pipe 13, and the liquid in the container 2 is returned to the container 2 through the first water pipe 11 and the third water pipe 13. The process to operate a valve 21 and communicate the passage 13 on the upper side of the container 2 to the lower section and guide the liquid to the outside of the container is provided in the process to boil the liquid or the process to preserve the heat of the liquid, thus the hot water in a route is circulated, and the temperature of the hot water in it can be increased to nearly the same level as the temperature of the hot water in the container 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric water heater that heats and maintains the temperature of a stored liquid and discharges it to the outside of the container.

2. Description of the Related Art Conventionally, this type of electric water heater has a structure as shown in FIG. That is, a container 31 with an open top is disposed within the electric water heater main body 30, the top opening of the container 31 is covered with a lid 32, and the liquid in the container 31 is heated by a heating element 33. ing. The temperature of the liquid in the container 31 is detected by a thermistor 34. Further, an electric pump 36, which is a means for drawing out the liquid in the container 31 to the outside of the container, is driven by a motor 36, and this electric pump 36 sucks the liquid from the suction port 3, and the pump 35
The liquid was led out of the container through a water pipe 39 that communicated with the outlet 38 to the outside of the container.

Problems to be Solved by the Invention However, in such a conventional configuration, the hot water stored in the water pipe 39 easily cools down, and if the water is kept in a boiling state in the container 31, Also, after the hot water was led out of the vessel, the temperature of the hot water in the water pipe 39 became considerably lower than the temperature of the hot water in the container 31 after a while. When using hot water in such a state, for example, place a regular coffee (hereinafter abbreviated as "coffee") utensil 4o below the outlet 38 to draw out the hot water and use a cup to brew coffee. If the amount is small, there is a problem in that the ratio of the amount of hot water in the water pipe 39 to the total amount of hot water used becomes large, resulting in a significantly low finished temperature. The same is true when brewing Japanese tea using a cucumber.

In addition, when newly added water is brought to a boil, if the water is tap water that contains limescale, the temperature of the water accumulated in the water pipe 39 does not rise much, and as a result, the water contains limescale. Since most of the water remained in its original 1-1 state, there was a problem in that the hot water that was drawn out had a chalky smell.

The present invention was made to solve these problems, and it is possible to achieve a high finished temperature even when brewing coffee, etc. even in small quantities, and even if you boil tap water, The object of the present invention is to provide an electric water heater that can use hot water without a chlorinated odor.

Means for Solving the Problems In order to achieve the above object, the present invention provides a series of paths for communicating the lower part of the container with the outlet to the outside of the container.
The path is branched, one is connected to the outlet, and the other is connected to the upper part of the container, and a valve and a valve driving means are provided at the branch. 1. In a normal state, the outlet is connected to the outlet. When the valve is operated, the passage on the upper side of the container is communicated with the lower part of the container, and in the step of boiling the liquid, the temperature of the liquid in the container is maintained at a predetermined level. A step is provided for simultaneously operating the means for leading the liquid out of the container and the valve after the temperature reaches or higher.

Further, the present invention provides means for detecting the temperature of the liquid in a series of paths that communicate the lower part of the container and the outlet to the outside of the container, and in the step of keeping the liquid warm, the temperature of the liquid in the path is , the step of simultaneously operating the means for leading the liquid out of the vessel and the valve when the temperature drops below a predetermined temperature is provided.

Furthermore, the present invention provides a means for detecting the temperature of the liquid in a series of paths that communicate the lower part of the container and the outlet to the outside of the container, and in the process of keeping the liquid warm, the liquid is removed from the container at regular intervals. This method includes a step of simultaneously operating the means for introducing the water into the air and the valve.

Operation According to the above structure, the step of operating the valve to communicate the passage on the upper side of the container with the lower part of the container and at the same time operating the means for leading the liquid out of the container is the step of boiling the liquid or the step of boiling the liquid. Because it is provided during the process of keeping warm, the hot water in the channel can be circulated and the temperature of the hot water within it can be raised to the same level as the temperature of the hot water in the container.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, a container 2 with an open top is disposed inside an electric water heater main body 1, and the top opening of the container 2 is covered by a lid 3 that can be opened and closed. is provided with a heating element 4 that heats the liquid in the container 2. Further, the temperature of the liquid in the container 2 is determined by a first thermistor 5.
Detected by An electric pump 6, which is a means for discharging the liquid in the container 2 to the outside of the container, is driven by a motor 7, and this motor 7 is controlled to turn on and off by a switch 8 interlocked with a knob 9. Further, the discharge port of the pump 6 communicates with a switching section 10 composed of several parts described later via a first water pipe 11, and from the switching section 10, a water pipe is connected to a second water pipe. water pipe 12
The second water pipe 12 is connected to the outlet 14 to the outside of the container, and the third water pipe 131 is connected to the upper part of the container 2. The temperature of the liquid in the first water pipe 11 is detected by a second thermistor 15,
In addition, the operation of the entire device is controlled by a controller section 16.

2 and 3 show the configuration of the switching section 10, which consists of a case 18 housing a backing 20 attached to the sliding shaft 19, and a case 18 housing the backing 20 attached to the sliding shaft 19. 19 and backing 20 constitute a valve 21. Further, the case 18 is formed with three openings, and a first opening 22, a second opening 23, and a third opening 24 are connected to the first water pipe 11 and the second water pipe 12, respectively.
, are in communication with the third water pipe 13.

In addition, the sliding shaft 19 and the backing 2 interlocked therewith
o is constantly urged in the direction of arrow a by a spring 26. An end of the plunger 27 constituting the solenoid 26 is connected to an end 28 of the sliding shaft 19 by a pin 29. Then, when the solenoid 26 is energized and operated, the plunger 27 and the sliding shaft 19 interlocked with it
The backing 20 is pulled in the direction of the arrow.

In a normal state, as shown in FIG. 2, the backing 20 is pushed to the right in FIG.
and the second water pipe 12 are communicated with each other. In this state, when the pump 6 is operated, the liquid in the container 2 is led out of the container through the outlet 14.

When the solenoid 26 is energized, the plunger 2 is pulled in the direction of the arrow as shown in FIG. It communicates with the third water pipe 13. In this state, when the pump 6 is operated, the liquid in the container 2 is transferred to the first water pipe 11. Through the third water pipe 13, the container 2
It is returned inward.

Figures 4 and 6 show the boiling and heat retention steps.
This shows an outline of changes in water temperature.

Figure 4 shows the water temperature in a conventional electric water heater.
&, θ1 is the water temperature in the container 31, θ2
is the temperature of the water in the water pipe 39. Now the temperature θ.

When boiling water, θ1 increases and the temperature reaches 100°C.
, that is, even in a boiling state, θ2 is hardly affected by the heating element 33, so it hardly increases;
Even if θ1 continues to maintain the predetermined insulating temperature θ8 in the heat retention step, the hot water temperature θ will rise slightly due to the heat received from the container 31, but the water temperature θ will be such that the amount of heat received from the container 31 and the amount of heat released from the water pipe 39 are balanced. . It will not rise above that. When hot water is extracted and used under these conditions, the smaller the amount of hot water used, the lower the amount of hot water compared to the total amount of hot water used.
The ratio of the amount of hot water in the water pipe 39 increases, and the temperature of the hot water drawn out drops significantly. Further, for example, if hot water is drawn out for a period of time Δt1 from the heat retention state, the water pipe 39
The hot water in the container 31 replaces the hot water in the container 31, and the hot water temperature θ2 in the water pipe 39 becomes equal to the hot water temperature θ1 in the container 31, but because the heat capacity is small, it cools down quickly.
Finally θ. It goes down to Therefore, in most cases, the first hot water that is drawn out is of low temperature.

FIG. 5 shows the change in water temperature in the electric water heater of the present invention, where θ1 is the water temperature in the container 2, and θ2 is the water temperature in the first water pipe 11. When water at a temperature θ□ is poured and boiled, for example, when θ1 is 100°C, that is, just before or after the boiling state, or for a time Δt2 before and after the boiling point, the solenoid 26 is energized and the valve is turned off. 21 to connect the first water pipe 11 and the third water pipe 13, and at the same time operate the pump 6, the hot water in the first water pipe 11 will circulate and flow into the container 2. It will be replaced with the hot water inside. As a result, the water temperature θ in the first water pipe 11 becomes close to 100°C. Also,
In the heat retention process, the hot water temperature θ in the first water pipe 11 is set to the minimum temperature θ that is desired to be maintained, and the hot water temperature θ in the first water pipe 11 detected by the second thermistor 16 is set. θ. When the temperature drops to , the valve 21 opens at time Δt3 and the pump 6
If a step is provided to operate the first water pipe 1 at the same time,
The hot water temperature θ; in 1 is always kept above 00.

Further, the setting of the process of simultaneous operation of the valve 21 and the pump 6 in the heat retention process is not controlled by the second thermistor 16 detecting a decrease in the hot water temperature in the first water pipe 11; Determine the time for the hot water temperature θ in the water pipe 11 to decrease from the insulating temperature θ8 in the container 2 by θ,''i!, and then determine the time Δ
Even if this step is set at intervals equal to or shorter than t4, the same effect can be achieved.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention,
The path from the container to the outlet is branched in the middle, a switching part is provided there, and the valve is operated to connect the passage on the upper side of the container with the lower part of the container, and at the same time lead the liquid out of the container. The process of operating the means is provided during the process of boiling the liquid or the process of keeping it warm, so that the hot water in the water pipe is circulated and the temperature of the hot water in the pipe is raised to the same level as the temperature of the hot water in the container. As a result, even when using a small amount of hot water, a high temperature can be obtained, and the extraction of coffee, etc. can also be made more ideal. Furthermore, even when boiling tap water containing limescale, the hot water in the water pipes can be raised to nearly 100°C by circulating the water during boiling, which can dramatically reduce limescale odor. It is possible.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an electric water heater showing an embodiment of the present invention, FIGS. 2 and 3 are enlarged cross-sectional views showing the configuration and operation of the flow path switching section of the electric water heater, and FIG. 5 is a characteristic diagram showing changes in water temperature of the conventional electric water heater, FIG. 5 is a characteristic diagram showing changes in water temperature of the electric water heater of the present invention, and FIG. 6 is a longitudinal sectional view showing the conventional electric water heater. It is. 1... Body, 2... Container, 3...
... Lid body, 4 ... Heating element, 6 ... First
thermistor, 6... pump 7... motor, 10... switching section, 11... first
Water pipe, 12...Second water pipe, 13...
・Third water pipe, 14 outlet to outside the device, 15
゛...Pa second thermistor, 18...Case, 19...Sliding shaft, 2゜...Backing, 21...Valve, 25... ·····spring,
26...Solenoid. Name of agent: Patent attorney Shigetaka Awano and 1 other person
Book 2-*, 沫3- 1坏4-・Ryokoko 5--ichi廿zut-lノG---nor:-fu0 7----Mo9 IQ---LnJ 蛎しξ pull 5 fl-~-↑j's 71 <- operation + 2---72 water pipe (3-n water storage + 4-1-δ Ib outside roofing soil D 15---1-2 Qsu- Kusu 9 7 (E years) t (Haruma) 13.-Booth ps--One person rick 2C--Linoy V

Claims (3)

[Claims] (1) A main body, a container disposed within the main body and containing a liquid, a lid covering an opening of the container, a heating element that heats the liquid in the container, and a liquid in the container. and a means for detecting the temperature of the liquid in the container, branching a path in the middle of a series of paths that connect the lower part of the container and the outlet to the outside of the container,
One end is connected to the outlet, the other is connected to the upper part of the container, and the branch part is provided with a valve and a driving means for the valve, and under normal conditions, the passage on the outlet side communicates with the lower part of the container. and when the valve is operated, the passage on the upper side of the container is communicated with the lower part of the container, and in the step of boiling the liquid, the temperature of the liquid in the container becomes equal to or higher than a predetermined temperature. An electric water heater further comprising a step of simultaneously operating a means for discharging liquid out of the container and the valve. (2) A main body, a container disposed within the main body and containing a liquid, a lid covering an opening of the container, a heating element that heats the liquid in the container, and a liquid in the container. and a means for detecting the temperature of the liquid in the container, and detecting the temperature of the liquid in a series of paths communicating between the lower part of the container and the outlet to the outside of the container. In the step of providing a means to keep the liquid warm, the electric current is provided with a step of simultaneously operating a means for leading the liquid out of the container and a valve when the temperature of the liquid in the path becomes a predetermined temperature or less. water heater. (3) A main body, a container disposed within the main body and containing a liquid, a lid covering an opening of the container, a heating element that heats the liquid in the container, and a liquid in the container. and a means for detecting the temperature of the liquid in the container, and detecting the temperature of the liquid in a series of paths communicating between the lower part of the container and the outlet to the outside of the container. In the process of providing a means to keep the liquid warm, at regular intervals,
An electric water heater equipped with a process for simultaneously operating a means for leading liquid out of the container and a valve.