JP2990921B2 - Electric water heater - Google Patents

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, and more particularly, to an electric water heater capable of heating and keeping a liquid contained in a container and pouring the liquid into an external container.

[0002]

2. Description of the Related Art Deterioration of the quality of tap water caused by recent environmental destruction and improvement of health consciousness have led to a demand for more delicious water, and the development of products that can provide delicious water and hot water has been desired.

[0003] A water purifier is one of them, and a water heater is also required to have a water purifying function. As a first method, conventionally, water in a container is boiled,
It had to remove musty odor and trihalomethane, which is said to be a carcinogen. However, in this method, if the length of the boiling time is too long, a large amount of steam will be released, which is dangerous for handling, and will lead to a shortened life of parts such as resin. However, some substances were difficult to remove by boiling alone, and were incomplete as a water purification means.

[0004] Therefore, a water heater provided with a water purification means such as activated carbon has been developed, and the provision of delicious water has been realized. In FIG. 3, reference numeral 101 denotes a container, and
The container 10 is moved out of the body by the electric pump 103 provided therein.
The hot water in 1 was supplied, and at the same time, water was passed through the water purifying means 104 and returned to the container 101, and this was repeated to purify water. At this time, the course of the hot water in the lead-out route 102 is determined by the opening direction of the valve 105 (the direction of the arrow),
When the user operates the knob to dispense hot water, the valve 105 opens toward the discharge port 106, and the hot water flows out of the body through the discharge port 106.

At other times, the valve 105 is connected to the water purification means 1
The structure is such that the water is opened to the direction 04 and this operation is continued for a certain period of time to purify the water.

[0006]

[0010] Purified water is purified by water purifying means 104.
In the case where the water is passed through the inside, the water is purified for a long time by the water purification means 104.
It is necessary to circulate inside to be effective,
As a method therefor, the water in the container 101 is
A water circulation circuit separate from the outside of the vessel, which circulates through the water passage 04, is formed, or the water purification means 10
A configuration is conceivable in which a valve 105 for switching the passage to No. 4 is provided to switch between derivation and purified water.

[0007] However, these require a plurality of water passage circuits, are complicated in valve configuration, and have been expensive as products. An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an electric water heater that is inexpensive, has excellent operability, and has few failures.

[0008]

In order to achieve this object, an electric water heater according to the present invention comprises a container for accommodating a liquid, a lead-out path for leading the liquid in the container out of the container, and a motor in the lead-out path. An electric pump provided with a pump chamber having an impeller to be rotated by the motor, and an arrival height of the liquid when the rotation of the motor is equal to or lower than a certain distance below the highest point in the lead-out path. At a position, a branch path leading into the container, and a water purification means disposed in a water purification path leading from the branch path to the container,
When the rotation of the motor is equal to or less than a certain value, the liquid sent out of the container by the rotation of the impeller returns from the branch path to the inside of the container via the water purification path and the water purification means, and the rotation of the motor is constant. In the above case, the liquid sent out from the inside of the container by the rotation of the impeller is configured to be led out of the container from the leading end of the lead-out path.

[0009]

In the electric water heater of the present invention, an electric pump is provided in a lead-out path for drawing out the liquid in the container, and the rotation of the motor is below a certain point in the lead-out path at a certain interval from its highest point. At the position of the arrival height of the liquid at the time, a branch path to the inside of the container is provided, and a water purification means is arranged in a water purification path from this branch path to the inside of the container, and when the pump operates for water purification, Since the rotation of the motor is set below a certain reference and the tip of the liquid only reaches above the vicinity of the branch, the liquid repeats the operation of passing through the water purification path to the water purification means and returning to the inside of the container.

When the rotation of the motor is set to a certain level or more by operating the hot water supply knob and the liquid is discharged, the liquid level reaches the highest point of the discharge path, so that the liquid level reaches the highest point of the discharge path. Will be supplied. At this time, the cross-sectional area of the passage extending from the branch passage to the outside of the vessel is larger than that of the passage extending from the branch passage to the water purification means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric water heater according to one embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a substantially cylindrical liquid storage container. The outer edge of a heat transfer plate on which a heating element 2 is mounted is fixed to the lower end of a cylindrical body in a liquid-tight manner by welding or the like. doing. A pipe-shaped waterproof fitting 3 is provided on the bottom surface of the container 1 and is connected via a bushing 4 to an electric pump 5 which is a lead-out means.

The electric pump 5 has a pump chamber 6 made of hot water resin or the like constituting an outer shell, an impeller 7 in the pump chamber 6 formed integrally with a magnet, a shaft 8 supporting the impeller 7, and a pump chamber. A magnetic pole plate 9 a is provided outside the impeller 7 so as to face the impeller 7. The pole plate 9a is inserted into the shaft of the motor 9 and rotates synchronously with the motor 9.

Reference numeral 10 denotes an energization path supplied from the control circuit 11 to the motor 9. A constant voltage is applied from the control circuit 11 to control energization of the motor 9.

The shape of the pump chamber 6 is substantially cylindrical, and a water inlet 12 connected to the bushing 4 is provided at the center on one side of the end face, and a discharge port connected to a water pipe 14 which is one of the lead-out paths 13 on the side. It consists of 15. In the pump chamber 6, an impeller 7 having a disk shape and having several blades is provided with a minute gap on a substantially cylindrical wall surface.

At the end of the water pipe 14, a water pipe bushing 17 having a fall prevention valve 16 is provided.
8a, the leading end 19 of the lead-out path via the case 18
Has been reached. Reference numeral 20 denotes a body that wraps the container 1 through a space. Reference numeral 21 denotes a spout placed on the body 20 and sandwiches the body 20 together with a lower hook 22.

Reference numeral 23 denotes a lid placed on the spout 21 and supported by a hinge. Reference numeral 24 denotes a hot water supply knob provided at a part of the spout 21. By operating the knob, the motor 9 is energized to rotate the impeller 7 and lead the liquid in the container 1 out of the container. The control circuit 11 controls the energization of the heating element 2 in response to the signal of the temperature sensor 25, in addition to the energization control of the motor 9. Reference numeral 26 denotes a display unit for displaying the energized state and the presence or absence of an abnormality. When the motor 9 is energized, the magnetic pole plate 9a inserted into the shaft of the motor 9 rotates, and the impeller 7 facing this rotates synchronously. By rotating the impeller 7 in this manner, the container 1
Pump out the liquid inside.

Reference numeral 30 denotes a branch provided below the water pipe 14 which is one of the lead-out routes 13 at a certain interval below the highest point 18a of the lead-out route 13. The water purification path 31 from here to the container 1 is inclined downward toward the container 1. The cross section of the water purification path 31 is the derivation path 1 from the branch path 30.
3 is smaller than that of the path leading to the distal end portion 19, and a water purification means 32 is provided at a portion facing the container 1 at the distal end of the water purification path 31.

When an operation is performed to purify the water, the impeller 7 rotates at a low speed and sends out the liquid from the container 1. Due to the low speed, the sent liquid rises only up to a certain height of the branch passage 30, and the liquid repeats the operation of returning to the container 1 via the water purification path 31 to the container 1 to the water purification means 32.

At this time, even if the water purification function does not require any special operation, for example, when the water temperature in the container 1 reaches a certain temperature, the motor 9 automatically rotates to send water to the water purification means 32. It becomes possible by programming in the control circuit 11.

When the hot water supply knob 24 is operated, the motor 9
Rotates the liquid over a certain amount and sends out the liquid in the container 1. At this time, the liquid reaches the highest point 18 a of the case 18 of the discharge path 13 and is discharged out of the body from the tip 19.

At this time, a small amount of liquid also flows into the water purification path 31 that reaches the container 1. However, since the cross section of the flow path is small and the flow path is formed in the opposite direction to the flow, there is a significant decrease in the derivation performance. Absent.

[0022]

As is apparent from the above description of the embodiment, according to the electric water heater of the present invention, the electric pump is provided in the lead-out path for drawing out the liquid in the container, and the highest point is provided in the lead-out path. Provide a branch path to the inside of the container at a position at the arrival height when the rotation of the motor is less than a certain distance, and provide a water purification means in the path from the branch path to the inside of the container. Use a complicated valve configuration because the impeller is rotated to let the liquid inside the container out of the container, and the cross-sectional area of the passage from the branch to the outside of the vessel is larger than that from the branch to the water purification means. Therefore, it is possible to provide a device excellent in use operability and safety at a low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric water heater according to one embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing a configuration of a pump portion of the same.

FIG. 3 is a longitudinal sectional view showing a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 5 Electric pump 6 Pump room 7 Impeller 9 Motor 13 Outgoing path 18a Highest point 19 Tip part 30 Branch path 31 Water purification path 32 Water purification means

Claims (2)

(57) [Claims] 1. An electric pump comprising: a container for accommodating a liquid; a lead-out path for leading the liquid in the container out of the body; a pump chamber having an impeller rotated by a motor in the lead-out path; In the path, at a certain distance below the highest point, at a position of the liquid reaching height when the rotation of the motor is equal to or less than a predetermined value, a branch path into the container, and the branch path from the branch path. Water purification means disposed in a water purification path leading to the container, and when the rotation of the motor is equal to or less than a predetermined value, the liquid sent out of the container by the rotation of the impeller, the water purification path from the branch path, When the motor returns to the inside of the container via the water purification means and the rotation of the motor is equal to or more than a certain value, the liquid sent out from the inside of the container by the rotation of the impeller flows from the tip of the outlet path to the container. Electric kettle having a structure that is derived. 2. The electric water heater according to claim 1, wherein the cross-sectional area of the lead-out path extending from the branch path to the outside of the container is larger than the cross-sectional area of the path extending from the branch path to the inside of the container.