JP2853620B2 - 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 pump pumping type electric water in which an inner container unit including an inner container and an outer container unit including an outer container are separable. It relates to a boiler.

[0002]

2. Description of the Related Art An electric water heater which has been well known in the related art has a structure in which an inner container unit and an outer container unit are separable. In the air pump pumping type, which has an air pump for deriving the content liquid in the lid, there is no problem in separating the inner container unit and the outer container unit, but in the electric pump pumping type, It is common to adopt a configuration in which an electric pump is assembled to the outer container unit, and a passage configuration that allows the electric pump to communicate with the inner container is required, and a configuration in which the inner container unit and the outer container unit are separated from each other is required. There is a problem that it cannot be done.

[0003] Therefore, an electric pump of a type in which the pump section and the drive section are separable is adopted, and the pump section is attached to the inner container unit, while the drive section is attached to the outer container unit. There has been proposed a device in which the outer container unit and the outer container unit can be separated (for example, see Japanese Patent Application Laid-Open No. 4-314414).

[0004]

However, in the case of such a configuration as in the above-mentioned known example, the following problem newly occurs unless the mounting position and mounting structure of the pump portion are devised.

Originally, in the case of an electric water heater having a structure in which the inner container unit and the outer container unit can be separated, the inner container unit separated from the outer container unit can be placed on a horizontal surface such as a table surface. It is important that the pump is housed and arranged at an appropriate position in an annular recess formed in the bottom peripheral portion of the inner container in the above-mentioned known example. Since the annular concave portion is also formed in the portion that does not contribute to the storage of the internal container, there is a problem in that the presence of the concave portion complicates the cleaning work when cleaning the inner container, and the shape of the electric heater for heating the inner container is circular. There is a restriction that the recess must be avoided.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in an electric pump-pumping type electric water heater of an inner / outer container unit separation type, the inner container can be easily cleaned and the electric heater for heating can be used. It is intended to eliminate shape restrictions.

[0007]

According to a first basic configuration of the present invention, as means for solving the above problems, an inner container heated by an electric heater, a temperature sensor for detecting the temperature of the inner container, An electric pump that discharges the liquid in the inner container to the outside via a liquid discharge passage, comprising: an outer container unit including the electric heater and the temperature sensor; and an outer container. In the electric water heater comprising the inner container and the inner container unit including the liquid discharging passage which is detachable from the unit, the electric pump communicates the inner container with the liquid discharging passage. Pump body and a drive unit separated from the pump body, and the pump body is attached to the inner surface of the bottom of the inner container on the inner container unit side, while the drive Is attached to the outer container unit, and a mounting surface for holding the inner container unit in an upright posture in a separated state is formed on a bottom portion of the inner container unit, and the upright of the inner container unit in the separated state is formed. In addition to ensuring the posture, the cleaning operation of the inner peripheral surface of the inner container is facilitated and the shape restriction of the electric heater for heating is eliminated.

In a second basic configuration of the present invention, as means for solving the above problems, an inner vessel heated by an electric heater, a temperature sensor for detecting the temperature of the inner vessel, A container body having an electric pump for discharging liquid to the outside via a liquid discharge passage, wherein the container body is detachably attached to an outer container unit including the electric heater and the temperature sensor and the outer container unit. An electric water heater comprising the inner container and an inner container unit including a liquid discharging passage, wherein the electric pump is provided with a pump main body for communicating the inner container with the liquid discharging passage and the pump. The pump body is attached to the bottom outer surface of the inner container on the inner container unit side, and the drive unit is connected to the outer container unit. A mounting surface is formed at the bottom of the inner container unit for holding the inner container unit in an upright posture when the inner container unit is separated, and the erect posture of the inner container unit in the separated state is secured. In addition to the above, the cleaning operation of the inner peripheral surface of the inner container is facilitated and the shape restriction of the electric heater for heating is eliminated.

In the first and second basic configurations of the present invention, the driving section is constituted by a motor and a rotor rotated by the motor and having a driving magnet.
When the pump body is constituted by an impeller that has a driven magnet that applies an attraction force to the drive magnet and rotates with the rotation of the rotor, it is preferable in that the structure can be simplified. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 4 show an electric water heater according to a first embodiment of the present invention.

As shown in FIG. 1, the electric water heater comprises a container body 1 having a cylindrical inner container 3 having a bottom, and a lid 2 for opening and closing the upper opening 3a of the inner container 3. It is provided with.

The container body 1 includes an outer container unit X including an electric heater 4, a temperature sensor 5, an outer case 6, a shoulder member 7 and a bottom member 8, and an inner container unit including an inner container 3 and a liquid discharge passage 9. The inner container unit Y is detachable from the outer container unit X (see FIG. 2).

An outer peripheral side of the outer container unit X has a cylindrical outer case 6 made of sheet metal, a synthetic resin shoulder member 7 attached to the upper end of the outer case 6 in an engaged state, and And a synthetic resin dish-shaped bottom member 8 attached to the lower end of the case 6 in an engaged state. A hinge pin 10 of the lid 2 is provided on the rear side and the front side of the shoulder member 7. And a beak portion 7b having a spout 11 through which a spout 9b, which is an outlet of the liquid pouring passage 9, is formed. The beak 7b inside the outer container unit X
Is a space 1 having a predetermined width in the circumferential direction
2 are formed. On the front surface of the outer case 6, a viewing window 13 for seeing through a water level detection tube 9c described later is formed.

The inner peripheral surface of the outer container unit X is
It is constituted by a bottomed cylindrical inner container 14 having an upper edge locked and fixed to the shoulder member 7, and a portion corresponding to the viewing window 13 of the outer case 6 on the front side of the inner container 14 is provided. ,
An opening 15 for seeing through the water level detection pipe 9c is formed.

A substantially disk-shaped electric heater 4 is provided at the inner bottom of the inner container 14. A circular hole 16 is formed in the central portion of the electric heater 4 and the inner container 14, and a temperature sensor 5 for detecting the temperature of the inner container 3 is provided in a state penetrating the hole 16. Have been. On one side of the electric heater 4 (that is, on the side corresponding to the beak 7b), a cutout 18 for disposing an electric pump 17 described later is formed. Reference numeral 19 denotes a microcomputer board that obtains temperature information from the temperature sensor 5 and appropriately outputs a control signal to the electric heater 4.

The upper surface of the electric heater 4 has an arc shape convex upward, and when the inner unit Y is mounted, the bottom portion 3b of the inner container 3 is closely mounted on the upper surface of the electric heater 4. It is to be done. That is, in the case of the present embodiment, the bottom 3b of the inner container 3 also has an upwardly convex arc shape. And in the central part of the inner container bottom 3b,
A circular ridge 20 to which the temperature sensor 5 contacts is formed.

On the front side of the beak 7b of the shoulder member 7, a switch board 21 is provided.

On the other hand, in the inner container unit Y,
A substantially annular support frame 22 that locks and fixes the upper edge of the inner container 3 and serves as a grip when the inner container unit Y is attached and detached.
A protective frame 23 for protecting the liquid discharge passage 9 is integrally formed on the front side of the support frame 22. An opening 2 for seeing through the water level detection tube 9c is provided in a portion of the protective frame 23 corresponding to the viewing window 13 of the outer case 6.
4 are formed.

In the lower part of the inner periphery of the inner container 3 (that is, the side periphery corresponding to the beak 7b), a liquid discharging passage 9 for discharging the liquid (for example, hot water) in the inner container 3 to the outside is provided. Inlet 9a
Is connected to the space 1 between the inner container 3 and the inner container 14 on the front side of the container body 1.
2, the spout 9b is allowed to face the spout 11 of the beak 7b. The straight pipe portion in the liquid discharge passage 9 is a water level detection pipe 9c, and a portion corresponding to the water level detection pipe 9c in the outer case 6 is:
The viewing window 13 is used as described above.

In the middle of the liquid discharge passage 9 (that is, at a position located in the space 12), a liquid discharge passage falling water valve 25 for closing the liquid discharge passage 9 when the main body falls down is provided. Is provided.

In this embodiment, the lid 2 is pivotally supported so as to be detachable and openable by locking a hinge pin 10 to a hinge supporting portion 7a of a shoulder member 7 of the container body 1. Inside thereof, a steam discharge passage 2 for discharging steam generated in the inner container 3 to the outside.
6 are formed. Reference numeral 27 denotes a steam discharge passage falling stop valve that closes the steam discharge passage 26 when the vehicle falls.

Next, the structure of the electric pump 17 will be described in detail with reference to FIG.

The electric pump 17 has an outer container unit X
A drive unit 28 attached to the inner side and a pump body 29 detachable from the drive unit 28 and attached to the inner container unit Y side.

The drive unit 28 includes a rotor housing 30 fixed at a position corresponding to the cutout 18 of the electric heater 4 at the bottom of the inner container 14, and a motor 31 attached to a lower end of the rotor housing 30. And a rotor 32 in the rotor housing 30 and pivotally supported by a rotation shaft 31a of the motor 31. The rotor 32 has a driving magnet 33 built therein.

On the other hand, the pump body 29 has an extremely shallow horseshoe-shaped recess 40 formed at a position corresponding to the drive section 28 on the upper surface of the bottom 3b of the inner container 3 (see FIG. 3).
And a pump housing 34 having a suction port 34a and a discharge port 34b, and an impeller 35 rotatably supported in the pump housing 34. The impeller 35 has a driven magnet 36 that rotates together with the drive magnet 33 as the rotor 32 rotates.
Is built-in. The outlet 30b of the pump housing 34 is connected to the inlet 9b of the liquid discharge passage 9. Reference numeral 37 denotes a rotating shaft of the impeller 35, and 38 denotes a rotating shaft 3.
A conical pivot portion 39 rotatably supporting 5 is a support rod for preventing the impeller 35 from deviating from the pivot portion 38.

As described above, by fixing the pump body 29 to the extremely shallow horseshoe-shaped recess 10 formed on the inner surface of the bottom of the inner container 3, the bottom of the inner container unit Y A mounting surface that holds the erect posture in the separated state is formed.

In the electric water heater configured as described above, the following operation and effect can be obtained.

An appropriate amount of water is put into the inner container 3 and heated by the electric heater 4 to obtain boiling water. The steam generated at that time is discharged to the outside through the steam discharge passage 9. A pressure increase in the inner container 3 is avoided.

When pouring out the hot water obtained as described above, the motor 31 is driven by operating a hot water supply switch (not shown) provided on the switch board 21. Then
The rotation of the motor 31 on the drive section 28 side of the electric pump 17 rotates the rotor 32 having the drive-side magnet 33, and the rotation of the rotor 32 causes the impeller 3 on the pump body 25 side to rotate.
5 is rotated, and the hot water in the inner container 3 is turned into the liquid discharge passage 9.
Is discharged from the spout 11.

The container body 1 is connected to the outer container unit X.
When separating the inner container unit Y from the inner container unit Y, first, the lid 2 is removed, and then the inner container unit Y is removed from the outer container unit X. Since the pump body 29 and the drive unit 29 on the outer container unit X side are separated from each other, the separation operation is easily performed.

Further, as shown in FIG. 2, the bottom of the separated inner container unit Y can be placed on the horizontal plane L, which facilitates maintaining the upright posture of the inner container unit Y at the time of separation. Since the shape of the bottom 3b of the inner container 3 does not become complicated, the inner peripheral surface of the inner container 3 can be easily cleaned.

Further, since the shape of the lower surface of the inner bottom 3b is not different from the conventional one, it is not necessary to change the shape of the electric heater 4 which is in contact with the inner bottom 3b.
The contact area of the electric heater 4 can be secured. Therefore, a decrease in the heating efficiency can be prevented.

Second Embodiment FIGS. 5 and 6 show an electric water heater according to a second embodiment of the present invention.

In this case, the pump body 29 of the electric pump 17 is mounted on a horseshoe-shaped mounting recess 41 formed at a position corresponding to the beak 7b on the outer surface of the bottom 3b of the inner container 3 on the inner container unit Y side. I have. That is, the mounting hole 42 formed on the upper surface of the mounting recess 41
The pump housing 34 in the pump body 29
Is fixed by fixing the suction port 34a of the suction port 34a with a nut 43. And in the mounted state,
The lower surface of the pump body 29 and the lowest portion of the inner container bottom 3b are to be positioned on the same horizontal plane L (see FIG. 6). With this configuration, the bottom portion of the inner container unit Y forms a mounting surface that holds the inner container unit Y in the upright posture when the inner container unit Y is separated, and the erect posture of the inner container unit Y at the time of separation. Holding becomes easy. Further, only the end of the suction port 34a is present on the inner surface side of the bottom 3b of the inner container 3, so that the cleaning operation of the inner container 3 becomes extremely easy. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Third Embodiment FIGS. 7 to 10 show an electric water heater according to a third embodiment of the present invention.

In this case, the pump body 29 of the electric pump 17 mounts the mounting bracket 45 on the mounting recess 41 formed at a position corresponding to the beak 7b on the bottom surface 3b of the inner container 3 on the inner container unit Y side. Attached through. The mounting bracket 45 has a substantially U-shaped cross section as shown in FIGS.
A is formed with a hole 47 for inserting the suction port 34a of the pump housing 34, while a hole 48 for inserting the lower end of the pump housing 34 is formed in the lower horizontal portion 45b. The upper horizontal portion 15a of the mounting bracket 45 is fixed to the outside of the inner container bottom 3b (that is, the upper wall of the mounting recess 41) by a suitable fixing means (for example, spot welding). Also, the bottom 3b of the inner container 3
A metal ring 46 having an L-shaped cross section is fixed to the outer peripheral edge of the lower surface by welding. The ring 46 constitutes a mounting surface that holds the erect posture on the horizontal plane L when the inner container unit Y is separated (see FIG. 8).
Reference numeral 44 denotes a suction hole 34a and a mounting hole 42 in the inner bottom 3b.
A sealing member for sealing between the pump body 29 and
Is a screw for attaching to the mounting bracket 45.

With this configuration, the pump main body 29 can be mounted from the lower side of the inner container 3, and the mounting workability is improved. Further, only the end of the suction port 34a exists on the inner surface side of the bottom 3b of the inner container 3, and the inner container 3
Cleaning work becomes extremely easy. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

[0039]

According to the present invention, the electric pump for discharging the liquid in the inner container to the outside through the liquid discharging passage is provided with a pump body attached to the inner container unit and a drive unit attached to the outer container unit. And the pump body is attached to the inner surface of the inner container bottom or the outer surface of the inner container bottom, and in the bottom of the inner container unit, in an upright posture in a state where the inner container unit is separated. Since the holding surface for holding is formed, there is an effect that the erect posture of the inner container unit in the separated state can be secured.

Further, since the shape of the bottom of the inner container does not need to be changed much, the work of cleaning the inner container 3 becomes easy, and the shape of the electric heater abutting on the lower surface of the bottom of the inner container may be the same as before. Thus, a decrease in the heating efficiency by the electric heater can be prevented.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view showing a separated state of the container main body in the electric water heater according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an enlarged sectional view of an electric pump part in the electric water heater according to the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of an electric water heater according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a separated state of a container main body in an electric water heater according to a second embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of an electric water heater according to a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a separated state of a container main body in an electric water heater according to a third embodiment of the present invention.

FIG. 9 is an enlarged sectional view of an electric pump part in an electric water heater according to a third embodiment of the present invention.

FIG. 10 is an enlarged perspective view showing a main part of an inner container unit in an electric water heater according to a third embodiment of the present invention.

[Explanation of symbols]

1 is a container body, 2 is a lid, 3 is an inner container, 3a is an upper opening, 3b is a bottom, 4 is an electric heater, 5 is a temperature sensor, 9
Is a liquid discharge passage, 17 is an electric pump, 28 is a drive unit, 2
9 is a pump body, 30 is a rotor housing, 31 is a motor, 32 is a rotor, 33 is a driving magnet, 34 is a pump housing, 35 is an impeller, 36 is a driven magnet, 41 is a mounting recess, X is an outer container unit, Y is an inner container unit,
L is a horizontal plane.

Claims (3)

(57) [Claims] An inner container heated by an electric heater;
A container body having a temperature sensor for detecting the temperature of the inner container, and an electric pump for discharging the liquid in the inner container to the outside via a liquid discharging passage, the container body including the electric heater and outer container unit and said containing a temperature sensor
An electric water heater comprising the inner container and an inner container unit including a liquid injection passage detachably attached to an outer container unit , wherein the electric pump is provided with the inner container and the liquid injection A pump body communicating with the passage and a drive unit separated from the pump body,
While attaching the pump body to the inner surface of the bottom of the inner container on the inner container unit side, attaching the drive unit to the outer container unit, at the bottom of the inner container unit,
Electric water heater, characterized in that the formation of the to that mounting surface held in upright posture in a separated state inner container unit. 2. An inner container heated by an electric heater,
A container body having a temperature sensor for detecting the temperature of the inner container, and an electric pump for discharging the liquid in the inner container to the outside via a liquid discharging passage, the container body including the electric heater and outer container unit and said containing a temperature sensor
An electric water heater comprising the inner container and an inner container unit including a liquid injection passage detachably attached to an outer container unit , wherein the electric pump is provided with the inner container and the liquid injection A pump body communicating with the passage and a drive unit separated from the pump body,
While attaching the pump body to the bottom outer surface of the inner container on the inner container unit side, attaching the drive unit to the outer container unit, at the bottom of the inner container unit,
Electric water heater, characterized in that the formation of the to that mounting surface held in upright posture in a separated state inner container unit. 3. The driven unit in which the driving unit is constituted by a motor and a rotor rotated by the motor and having a driving magnet, and the pump body is configured to apply an attractive force between the pump body and the driving magnet. The electric water heater according to any one of claims 1 and 2, further comprising an impeller having a side magnet and rotating with the rotation of the rotor.