JP2003038353A - Electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric water heater which can discharge hot water stably by securing a discharging quantity of a normal time even when discharging hot water directly after boiling hot water. SOLUTION: The electric water heater heats a liquid 2 in a container 1 and discharges hot water to the outside of the container 1 through a hot water discharging path 4 by using an electric pump 3 corresponding to the operation of a hot water discharging switch 5. When operating the switch 5 before a prescribed time h1 elapses directly after boiling of hot water, a control means 6 controls a power source 7 to apply voltage V2 equal to or higher than normal hot water discharging voltage V1 to the pump 3 to discharge hot water. Thus, the reduction of a discharging quantity due to the bubbles in the pump 3 occurring directly after boiling is suppressed to improve the performance of discharging hot water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater that heats and keeps the temperature of a liquid contained in a container and discharges the liquid outside the container.

[0002]

2. Description of the Related Art A conventional electric water heater will be described below with reference to the drawings. Conventionally, in this type of electric water heater, the output voltage to the electric pump that draws the liquid in the container out of the body is constant as shown in FIG.
It was intended to obtain a constant discharge amount through the hot water passage.

[0003]

However, in the above-mentioned conventional configuration, since a constant applied voltage is applied to the electric pump, bubbles are blown in the pump immediately after boiling and the discharge amount at the start of hot water is normal. There is a problem that the discharge amount is smaller than the discharge amount.

The present invention is intended to solve the above-mentioned problems, and it is possible to secure the discharge amount in the normal state even when tapping water immediately after boiling water.
An object of the present invention is to provide an electric water heater having stable hot water discharge performance.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a normal hot water discharge voltage, which is an applied voltage supplied from a power source for driving an electric pump when hot water is discharged within a predetermined time immediately after boiling water. It is an electric water heater which is supplied as the above-mentioned applied voltage.

According to the present invention, it is possible to realize an electric water heater having a stable hot water discharge performance by ensuring a discharge amount in a normal time even when hot water is discharged immediately after boiling water.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 is a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, and an applied voltage supplied to the electric pump to drive the electric pump. A power source, a hot water outlet switch for the user to instruct hot water discharge, a control means for controlling the applied voltage, and a hot water discharge path, wherein the control means is the normal hot water discharge voltage when hot water is discharged within a predetermined time immediately after boiling water. It is an electric water heater that controls the power source so as to supply the above-mentioned applied voltage to the electric pump.

In the present invention, the control means controls the power supply to supply an applied voltage equal to or higher than the normal hot water discharge voltage to the electric pump when hot water is discharged within a predetermined time immediately after boiling water. Therefore, even when hot water is discharged immediately after boiling water, stable hot water discharge performance can be obtained without decreasing the discharge amount from the normal amount.

The present invention according to claim 2 uses a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump. A person is provided with a hot water output switch for instructing and operating hot water, a control means for controlling the applied voltage, and a hot water discharge path. Is an electric water heater that controls the power source to supply the electric power to the electric pump.

In the present invention, the control means controls the power supply to supply an applied voltage equal to or higher than the normal hot water discharge voltage to the electric pump when hot water is discharged within a predetermined time from the start of boiling water. Therefore, even after hot water boiling or hot water discharge at high temperature, stable hot water discharge performance can be obtained without decreasing from the normal discharge amount.

The present invention according to claim 3 uses a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump. A person is provided with a hot water switch for instructing and operating hot water, a control means for controlling the applied voltage, and a hot water discharge path, and the control means is within a predetermined time after the hot water temperature reaches a predetermined temperature after the start of boiling water. It is an electric water heater that controls the power source so as to supply an applied voltage higher than the normal hot water discharge voltage to the electric pump at the time of hot water discharge.

In the present invention, the control means controls the power supply to supply an applied voltage higher than the normal hot water discharge voltage to the electric pump when hot water is discharged within a predetermined time after the hot water temperature reaches the predetermined temperature after the start of boiling water. To do. Therefore, even after hot water boiling or hot water discharge at high temperature, stable hot water discharge performance can be obtained without decreasing from the normal discharge amount.

According to a fourth aspect of the present invention, a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump are used. A person is provided with a hot water discharge switch for instructing and operating hot water, a control means for controlling the applied voltage, and a hot water discharge path. It is an electric water heater that controls the power source so as to be supplied to the electric water heater.

In the present invention, the control means controls the power supply so as to supply the applied voltage, which is higher than the normal hot water discharge voltage, to the electric pump when the hot water is discharged above the predetermined temperature. Therefore, even when hot water is discharged at a high temperature, stable hot water discharge performance can be obtained without decreasing the discharge amount from the normal amount.

The present invention according to claim 5 uses a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump. A person is provided with a hot water switch for instructing and operating hot water, a control means for controlling the applied voltage, and a hot water discharge path. Is an electric water heater that controls the power source to supply the electric power to the electric pump.

In the present invention, the control means controls the power source so as to supply the applied voltage to the electric pump which is equal to or higher than the normal hot water discharge voltage when hot water is discharged after a predetermined time has elapsed. Therefore, it is possible to scrape out the air bubbles that have accumulated during heat retention,
Even if the temperature is kept for a long time, stable hot water discharge performance can be obtained without decreasing from the normal discharge amount.

The present invention according to claim 6 uses a container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump. A person is provided with a hot water switch for instructing and operating hot water, a control means for controlling the applied voltage, and a hot water discharge path, wherein the control means applies an applied voltage equal to or higher than the normal hot water discharge voltage before the liquid is discharged outside the container. It is an electric water heater that controls the power source to supply it to an electric pump.

In the present invention, the control means controls the power source so as to supply the applied voltage, which is higher than the normal tapping voltage, to the electric pump before the liquid is discharged to the outside of the container. Therefore, stable hot water discharge performance can be obtained.

Examples of the present invention will be described below.

[0020]

(Embodiment 1) Hereinafter, Embodiment 1 of the electric water heater of the present invention will be described with reference to the drawings. Figure 1
Is a longitudinal sectional view showing the structure of the present embodiment, and FIG. 2 is a block diagram showing the structure. 1 and 2, the container 1
The liquid 2 stored in is passed through the hot water discharge path 4 by the electric pump 3 and discharged to the outside of the container 1. Electric pump 3
Is driven by the power source 7 controlled by the control means 6 by the hot water switch 5. At this time, the discharge amount is determined by the voltage of the power supply 7.

FIG. 3 is a characteristic diagram showing the operation of this embodiment. (A) shows the temperature of the liquid 2 and (b) shows the voltage applied from the power source 7 to the electric pump 3 with respect to time. Correspondingly shown. When the hot water outlet switch 5 is operated for a predetermined time h1 (1.5 hours in the present embodiment) immediately after boiling the water, the control means 6 controls the power source 7 and the normal hot water discharge voltage V
A voltage V2 (7.6 V in this embodiment) of 1 or more (6.8 V in this embodiment) is applied to drive the electric pump 3 to discharge hot water.

As a result, it is possible to suppress the decrease in the discharge amount due to the bubbles of the electric pump 3 occurring immediately after boiling the water, and to improve the hot water discharge performance.

The above voltage values are merely examples, and the present invention is not limited to these values.

(Second Embodiment) A second embodiment of the electric water heater of the present invention will be described below with reference to the drawings.

FIG. 4 is a characteristic diagram showing the operation of this embodiment. The main structure of this embodiment is the same as the structure shown in FIGS. 1 and 2, and the description thereof will be omitted.

As shown in FIG. 4, when the hot water switch 5 is operated during a predetermined time (H3-H2) from the start of boiling water (15 to 1 hour and 30 minutes after the start of boiling water in this embodiment), the control means is operated. The power supply 7 is controlled by 6 and the voltage V2 is higher than the normal hot water discharge voltage V1 (6.8V in this embodiment)
(7.6 V in this embodiment) is applied to drive the electric pump 3 to discharge hot water.

As a result, it is possible to suppress the decrease in the discharge amount even in the time zone in which bubbles are likely to be generated at a high temperature during boiling water.
The hot water discharge performance can be improved.

(Embodiment 3) Embodiment 3 of the electric water heater of the present invention will be described below with reference to the drawings. FIG. 5 is a characteristic diagram showing the operation of this embodiment. The main structure of this embodiment is the same as the structure shown in FIGS. 1 and 2, and the description thereof will be omitted.

As shown in FIG. 5, after starting the boiling of water, the hot water outlet switch 5 is operated for a predetermined time h4 (1.5 hours in this embodiment) to a predetermined temperature T1 (98 ° C. in this embodiment).
Is operated, the power source 7 is controlled by the control means 6, and the voltage V2 is higher than the normal hot water discharge voltage V1 (6.8V in this embodiment).
(7.6 V in this embodiment) is applied to drive the electric pump 3 to discharge hot water.

As a result, even in the time zone when bubbles are likely to be generated at high temperature during boiling water, it is possible to suppress the decrease in the discharge amount due to bubbles and improve the hot water discharge performance.

(Embodiment 4) Embodiment 4 of the electric water heater of the present invention will be described below with reference to the drawings. FIG. 6 is a characteristic diagram showing the operation of this embodiment. The main structure of this embodiment is the same as the structure shown in FIGS. 1 and 2, and the description thereof will be omitted.

As shown in FIG. 6, the hot water temperature is the predetermined temperature T2.
Hot water switch 5 when hot water (98 ° C in this embodiment) or higher
Is operated, the power source 7 is controlled by the control means 6, and the voltage V2 is higher than the normal hot water discharge voltage V1 (6.8V in this embodiment).
(7.6 V in this embodiment) is applied to drive the electric pump 3 to discharge hot water.

As a result, even in a time zone during which bubbles are likely to be generated at a high temperature during boiling water, it is possible to suppress the decrease in the discharge amount due to the bubbles and improve the hot water discharge performance.

(Embodiment 5) Embodiment 5 of the electric water heater of the present invention will be described below with reference to the drawings. FIG. 7 is a characteristic diagram showing the operation of this embodiment. The main structure of this embodiment is the same as the structure shown in FIGS. 1 and 2, and the description thereof will be omitted.

As shown in FIG. 7, the temperature is kept for a predetermined time h5.
When the hot water outlet switch 5 is operated during hot water discharge after the above (three hours in the present embodiment), the power source 7 is controlled by the control means 6 and the voltage V2 (normal power supply voltage V1 (6.8 V in this embodiment) or more In the embodiment, 7.6 V) is applied to drive the electric pump 3 to discharge hot water.

As a result, even if bubbles are generated during heat retention,
It is possible to suppress the decrease in the discharge amount due to foaming and improve the hot water discharge performance.

(Embodiment 6) Embodiment 6 of the electric water heater of the present invention will be described below with reference to the drawings. FIG. 8 is a characteristic diagram showing the operation of this embodiment. The main structure of this embodiment is the same as the structure shown in FIGS. 1 and 2, and the description thereof will be omitted.

As shown in FIG. 8, before the liquid 2 is discharged to the outside of the container 1, the normal hot water discharge voltage V1 (6.8 in this embodiment) is used.
V) A voltage V2 (7.6 V in this embodiment) equal to or higher than the voltage V is applied to drive the electric pump 3 to discharge hot water.

This makes it possible to suppress the decrease in the discharge amount and improve the hot water discharge performance in any of the cases of boiling water, boiling water, and keeping heat.

[0040]

As is apparent from the above description, according to the present invention according to claims 1 to 6, foaming is caused by bubbles during boiling, during boiling, immediately after boiling, or during heat retention. It is possible to suppress the decrease in the discharge amount and improve the hot water discharge performance. In addition, by improving the reaction at the start of tapping, excellent tapping performance can be produced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a configuration of Examples 1 to 6 of an electric water heater according to the present invention.

FIG. 2 is a block diagram showing the configuration of the same embodiment.

FIG. 3 is a characteristic diagram showing the operation of Example 1 of the electric water heater of the present invention.

FIG. 4 is a characteristic diagram showing the operation of Example 2 of the electric water heater of the present invention.

FIG. 5 is a characteristic diagram showing the operation of Example 3 of the electric water heater of the present invention.

FIG. 6 is a characteristic diagram showing the operation of Example 4 of the electric water heater of the present invention.

FIG. 7 is a characteristic diagram showing the operation of Example 5 of the electric water heater of the present invention.

FIG. 8 is a characteristic diagram showing the operation of Example 6 of the electric water heater of the present invention.

FIG. 9 is a characteristic diagram showing a voltage applied to an electric pump in a conventional electric water heater.

[Explanation of symbols]

1 container 2 liquid 3 electric pump 4 Hot water route 5 hot water switch 6 Control means 7 power supply

Continued front page    (72) Inventor Masamichi Komada             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 4B055 AA34 BA31 BA80 CD58 CD61                       GA07 GB09 GB12 GB44 GC31                       GD05

Claims (6)

[Claims] 1. A container for storing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water outlet switch, control means for controlling the applied voltage, and a hot water outlet path are provided, and the control means supplies an applied voltage equal to or higher than the normal hot water outlet voltage to the electric pump when the hot water is discharged within a predetermined time immediately after boiling water. Electric water heater to control the power supply. 2. A container containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water outlet switch, control means for controlling the applied voltage, and a hot water outlet path are provided, and the control means supplies an applied voltage equal to or higher than the normal hot water outlet voltage to the electric pump when the hot water is discharged within a predetermined time from the start of boiling water. Electric water heater to control the power supply. 3. A container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water output switch, a control means for controlling the applied voltage, and a hot water discharge path, wherein the control means has a normal hot water discharge voltage or more when hot water is discharged within a predetermined time after the hot water temperature reaches a predetermined temperature after starting boiling water. An electric water heater that controls the power source to supply the applied voltage to the electric pump. 4. A container containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water outlet switch, control means for controlling the applied voltage, and a hot water outlet path, wherein the control means supplies the applied voltage equal to or higher than the normal hot water outlet voltage to the electric pump when the hot water temperature is equal to or higher than a predetermined temperature. An electric water heater that controls. 5. A container for containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water outlet switch, control means for controlling the applied voltage, and a hot water outlet path are provided, and the control means supplies an applied voltage equal to or higher than the normal hot water outlet voltage to the electric pump when hot water is discharged after a predetermined time has elapsed. Electric water heater to control the power supply. 6. A container containing a liquid, an electric pump for discharging the liquid in the container to the outside of the container, a power supply for supplying an applied voltage to the electric pump to drive the electric pump, and a user instructing hot water discharge. A hot water outlet switch, control means for controlling the applied voltage, and a hot water outlet path are provided, and the control means supplies an applied voltage equal to or higher than the normal hot water outlet voltage to the electric pump before the liquid is discharged out of the container. An electric water heater that controls the power supply.