JP3058089B2 - Pump injection type liquid container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump injection type liquid container.

[0002]

2. Description of the Related Art In general, a pump-injected liquid container type liquid container (for example, a pump-injection type electric water heater) has an inner container 4 made of stainless steel in a container body 1 as shown in FIG. An electric heater 6 for heating the liquid is provided on the lower surface of the bottom of the inner container 4.
And the liquid in the inner container 4 is
The liquid is discharged through a series of liquid discharging passages 7 that communicate the bottom of the inner container 4 and a discharge port provided at the upper part of the container body 1.

Below the inner container 4 in the liquid discharging passage 7, an electric pump 37 (to be described in detail later) for discharging the liquid in the inner container 4 is placed in a horizontal position with the rotating shaft directed horizontally. It is interposed in.

In the drawings, reference numeral 2 denotes an outer case, 8 denotes a bottom member,
9 is a bottom cover 9, 10 is a rotary seat body 10, 11 is a heat shield plate, 12
Is a spring plate, 13 is a through hole, 14 is a temperature sensor, 15 is a heat shield wall, 39 is a liquid amount display tube, 60 is a substrate box, 61
Is a lid cover.

[0005] By the way, as an apparatus for pumping out the content liquid in the pump injection type liquid container, an electric pump having a drive side and a driven side is widely used because leakage of the content liquid can be easily obtained. ing.

[0006] For example, as shown in FIG.
A magnet (that is, a driven magnet) 52 provided on an impeller 51 in the pump chamber 41 having the discharge port 41 b is connected to a magnet on the rotating shaft 46 a side of the motor 46 (that is, the driving side) through the partition plate 43 of the pump chamber 41. Magnet) 49 in the axial direction,
There is a known technique in which the impeller 51 is rotated with the rotation of the magnet 49 on the motor rotation shaft 46a side (for example, see Japanese Patent Application Laid-Open No. 63-314394).

[0007]

However, in the case of the above-mentioned known electric pump, the magnet 49 on the side of the motor rotating shaft 46a is used.
(In other words, the driving magnet) and the magnet 5 on the impeller 51 side.
2 (in other words, the driven magnet) is disposed to face in the axial direction, so that the axial dimension of the electric pump must be increased, and there is a limit to downsizing.

Further, in the case of a pump injection type liquid container using an electric pump having such a structure, the axial dimension of the electric pump is large. If the placement position (that is, the rotation center is oriented vertically) is taken, the vertical dimension of the product will increase when securing the volume of the inner container, and the volume of the inner container will increase if the vertical dimension of the product is reduced. There is a problem that the size is reduced.

In order to cope with such a problem, as described above, the electric pump is placed in a horizontal position (ie, a position in which the center of rotation is oriented substantially in the horizontal direction).

However, when the electric pump is used in a horizontal position, the occupied area under the bottom of the inner container becomes large. In addition to the electric pump, components such as a control board are disposed below the bottom of the inner container. Therefore, when the area occupied by the electric pump increases, there is a problem that the arrangement space for other components is restricted. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and the use of a compact electric pump with a reduced axial dimension reduces the product height of a pump-injection type liquid container. Alternatively, the capacity of the inner container is increased).

[0012]

According to a first basic configuration of the present invention, as a means for solving the above-mentioned problems, a liquid in an inner container provided in a container body is removed from the bottom of the inner container. In a pump liquid injection type liquid container including a liquid discharge passage for discharging outside of the container main body and an electric pump for liquid injection provided in the middle of the liquid discharge passage, the electric pump is provided. A drive-side magnet pivotally supported by the rotation shaft of the motor, and an impeller having a driven-side magnet that rotates with the rotation of the drive-side magnet, and a rotation center is positioned on the side of the inner container. The container is arranged vertically and with the intake port facing downward, so that the space below the bottom of the inner container can be reduced, and the capacity of the inner container can be increased while suppressing the height of the product.

A second basic configuration of the present invention is a means for solving the above-mentioned problem, in which a liquid in an inner container provided in a container body is discharged from the bottom of the inner container to the outside of the container body. A liquid pouring type liquid container including a liquid pouring passage for pouring liquid into the liquid pouring passage and an electric pump for pouring liquid provided in the middle of the liquid pouring passage. A drive-side magnet that is pivotally supported, and an impeller having a driven-side magnet that rotates with the rotation of the drive-side magnet, the center of rotation of the inner container is predetermined with respect to the vertical direction. The container is arranged at an angle inclining and with the intake port facing downward, so that the space below the bottom of the inner container can be reduced, and the capacity of the inner container can be increased while suppressing the height of the product. In addition, the discharge port of the electric pump can be directed obliquely upward, and the occurrence of cavitation can be suppressed.

[0014]

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

First Embodiment (corresponding to claim 1) FIGS. 1 to 4 show the structures of a pump injection type liquid container and an electric pump according to a first embodiment of the present invention. I have.

As shown in FIGS. 1 and 2, the pump injection type liquid container has a synthetic resin shoulder member 3 on the upper portion of a synthetic resin outer case 2 having a body and a bottom integrally formed. A container body 1 provided with a stainless steel inner container 4 provided in the outer case 2, a lid 5 for covering the upper part of the container body 1, and an electric heater for heating the inner container 4 6
And a series of liquid discharge passages 7.

The inner container 4 has a cylindrical shape with a bottom, and a flange 4a formed at the upper end thereof is suspended around an inner peripheral edge 3a of the shoulder member 3 so that the outer case 2 is formed.
Supported within.

A lower opening 8a of the bottom portion 8 of the outer case 2 is closed by a bottom cover 9, and a rotatable seat 10 is rotatably supported on the outer periphery of the lower surface of the bottom cover 9. Thereby, when the container main body 1 is fixed, the container main body 1 is lightly rotated on the rotary seat body 10. Reference numeral 60 denotes a substrate box integrally formed on the bottom 8, 61.
Is a lid cover.

An electric heater 6 is in contact with the lower surface of the bottom of the inner container 4, and a heat shield plate 11 is fixed below the electric heater 6 with respect to the bottom of the inner container 4. Installed with. The electric heater 6 is held in a state of being pressed against the bottom of the inner container 4 by a spring plate 12 interposed between the electric heater 6 and the heat shield plate 11. The electric heater 6 is used for both water heating and heat retention, and is switched from water heating to heat retention when a boiling state is detected.

A through hole 13 is formed in the center of the electric heater 6, and a temperature sensor 14 for detecting the temperature of the inner container 4 is arranged in the through hole 13 so as to be separated by a heat shield wall 15. ing. The temperature sensor 14 detects the temperature of the inner container 4 and outputs an electric signal as temperature information for heat retention control. Reference numeral 16 denotes an operation panel unit, and 17 denotes a switch circuit board that outputs an ON / OFF signal based on the operation of various switches.

The cover 5 is provided with a hinge pin 1 against a partially open type bearing 18 integrally formed at the rear portion of the shoulder member 3.
9, and is pivotally supported so as to be freely opened and closed and detachable. That is, the lid 5 is opened and closed with the hinge pin 19 as a fulcrum, and the hinge pin 19 is
By detaching from 8, it can be removed. On the other hand, on the free end side of the lid 5, the lid 5
Is provided with a lock device 20 for maintaining the closed state.

The lid 5 includes an upper plate 5a and a lower plate 5b, both of which are integrally formed of synthetic resin and are welded and joined to each other at an outer peripheral edge. The lower surface of the lower plate 5b has A metal inner lid 21 for covering the upper opening of the inner container 4 when the lid 5 is closed is fitted from below and attached with screws 22. On the outer peripheral edge of the inner lid 21,
When the lid 5 is closed, a seal packing 23 is provided which is in contact with the flange portion 4a of the inner container 4 to maintain an airtight state.

Between the lid lower plate 5b and the inner lid 25, a passage forming member 2 sandwiched between the lower plate 5b and the inner lid 25 is provided.
4 forms a steam discharge passage 25 for discharging steam generated in the inner container 4 to the outside. The steam discharge passage 25 includes a first passage 25 a formed between the passage constituent member 24 and the inner lid 21, and a first passage 25 a formed between the passage constituent member 24 and the inner lid 21.
A second passage 25b formed between the lower plate 5b and the lower plate 5b;
The second plate formed between the lower plate 5b and the upper plate 5a;
Third passage 25 communicating with passage 25b via communication portion 26
c, the first passage 25a communicates with the inner container 4 through an inlet opening 27 formed in the inner lid 21, and the first passage 25a and the second passage 25b are The third passage 25c is communicated to the outside through an outlet opening 29 formed on the rear upper surface of the lid 5 through a through hole 28 formed at the center of the passage constituting member 24.

A valve chamber 32 is provided between the passage forming member 24 and the inner lid 21 and is vertically suspended from an edge of the through hole 28 and surrounded by a cylindrical wall 31 having a steam flow hole 30. In the valve chamber 32, when the liquid container falls, the through hole 28 is formed by its own weight and the flow pressure of the outflowing liquid.
Is provided with a falling water stop valve 33 that closes off.

The first in the steam discharge passage 25
And the second passages 25a and 25b have a relatively large horizontal extent, so that when the liquid container falls, the hot water in the inner container 4 discharges steam before the fall stop valve 33 operates. Even if it flows into the passage 25, the first
It is temporarily stored in the passage 25a or the second passage 25b, and it takes a certain amount of time to flow out of the outlet opening 29 to the outside. Therefore, the hot water storage container may be raised without panic before the hot water flows out.

Incidentally, the liquid discharge passage 7 passes from the bottom of the inner container 4 to the front of the inner container 4 and passes through a series of liquid discharge passages 7 facing the discharge guide 34 formed in the beak 3b of the shoulder member 3. It is formed as a passage. Reference numeral 35 denotes an inlet opening of the liquid discharge passage 7, and reference numeral 36 denotes a liquid outlet in the liquid discharge passage 7, which is located on the side of the front side of the inner container 4 in the liquid discharge passage 7. Electric pump 3
7 (detailed later) is interposed in a vertical posture with the rotation axis directed in the vertical direction. Further, in the middle of the liquid discharge passage 7 (that is, immediately before the outlet 36), the falling water stop valve 38 is provided.
Is provided. When the liquid container falls, it receives its own weight or the flow pressure of the outflowing liquid, and the falling water stop valve 38 closes to prevent the liquid from flowing out to the outside through the liquid discharge passage 7. It has become.

Further, a part of the liquid discharge passage 7 (that is, a portion located in front of the inner container 4) is a transparent liquid amount display tube 39, and flows into the liquid amount display tube 39. The liquid level of the liquid is visible from outside through a liquid amount display window 40 provided on the front surface of the outer case 2.

Next, the structure of the electric pump 37 will be described in detail with reference to FIG.

The electric pump 37 comprises a rotor housing 42 which forms a pump chamber 41 having a suction port 41a and a discharge port 41b, and a partition plate 4 for the pump chamber 41.
And a motor housing 45 constituting a motor chamber 44 partitioned through the motor housing 45.
A motor 46 serving as a driving source is mounted on the side opposite to the pump chamber. The suction port 41a is connected to the pump chamber 41.
At the lower side in the rotation center direction, and the discharge port 41
“b” is formed on the side wall of the pump chamber 41. The rotation shaft 46 a of the motor 46 is projected toward the motor chamber 44. Reference numeral 47 denotes an O-ring for sealing.

The partition plate 43 includes a flange portion 43a sandwiched between the rotor housing 42 and the motor housing 45, and a cylindrical portion 43b projecting from the inner peripheral edge of the flange portion 43a toward the pump chamber 41. I have. Further, a concave portion 48 for supporting a rotation center of an impeller, which will be described later, is formed at the center of the top surface of the cylindrical portion 43b.

A rotating body 50 having an annular drive-side magnet 49 and located in the cylindrical portion 43b of the partition plate 43 is rotatably supported on the motor rotating shaft 46a so as to rotate together therewith.

On the other hand, in the pump chamber 41, a boss portion 51a which has entered the outer peripheral side of the partition plate cylindrical portion 43b and a plurality of blades 51 which are radially integrated with the boss portion 51a.
, 51b,..., and a portion of the boss portion 51a of the impeller 51 which is located on the outer peripheral side of the partition plate cylindrical portion 43b is disposed between the impeller 51 and the drive side magnet 49. Driven magnet 52 for applying attractive force
Is buried. In other words, the drive-side magnet 49 and the driven-side magnet 52 are concentrically arranged on the inner peripheral side and the outer peripheral side of the partition plate cylindrical portion 43b so as to face each other in the radial direction.

The impeller 51 has support shafts 53 and 54 which are integrally provided in the center of the boss portion 51a in opposite directions to each other, and one of the support shafts 53 is connected to the partition plate cylindrical portion. The other support shaft 54 is rotatably supported by a bearing portion 55 formed at a suction port portion of the rotor housing 42, while being rotatably supported by a concave portion 48 formed at 43a.

Further, the rotor housing 42 and the motor housing 45 are connected to each other by connecting flange portions 42a and 45a protruding at a joining portion of the both with a fastening bolt 56. Reference numeral 57 denotes a bracket for mounting the electric pump 37.

The electric pump constructed as described above operates as follows.

When the rotating body 50 having the driving magnet 49 is rotated by the driving of the motor 46, the impeller 51 having the driven magnet 52 for applying an attractive force to the driving magnet 49 causes the support shaft 53, As a result, the liquid sucked from the suction port 41a is discharged from the discharge port 41b, and is discharged to the outside via the liquid discharge passage 7.

Further, in this embodiment, the drive-side magnet 49 and the driven-side magnet 52 are concentrically opposed to each other in the radial direction on the inner peripheral side and the outer peripheral side of the partition plate cylindrical portion 43b. Because of the arrangement, the axial dimension of the electric pump 37 can be reduced. Further, if the axial dimension of the electric pump 37 is the same as the conventional one, the axial dimension of the pump chamber 41 can be increased, and the degree of freedom in determining the position of the discharge port 41b is increased (that is, the solid line). And can be determined in the range shown by the chain line).

In addition, in the case of the present embodiment, the electric pump 37 is disposed on the side of the inner container 4 with the rotation center directed vertically, so that the space below the bottom of the inner container 4 is provided. Can be reduced, and the capacity of the inner container 4 can be increased while suppressing the height of the product.

Second Embodiment (corresponding to claim 2) FIG. 5 shows a pump injection type liquid container according to a second embodiment of the present invention.

In this case, the electric pump 37 is disposed on the front side of the inner container 4 with its rotation center inclined at a predetermined angle with respect to the vertical direction. By doing so, the discharge port 41b of the electric pump 37 is directed obliquely upward, and discharge of bubbles that have entered the pump chamber 41 is facilitated. Therefore, the occurrence of cavitation can be suppressed,
Fluid pouring becomes smooth. The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

In the above description, the pump filling type electric hot water storage container is taken as an example, but the present invention is of course applicable to other types of pump filling type liquid storage containers.

[0042]

According to the first basic constitution of the present invention, the liquid in the inner container disposed in the container body is poured out of the container body from the bottom of the inner container. Exit passage,
A pump-injection-type liquid container including an electric pump for liquid injection provided in the middle of the liquid injection passage, wherein the electric pump includes a drive-side magnet pivotally supported on a rotating shaft of a motor; An impeller having a driven-side magnet that rotates with the rotation of the drive-side magnet, and is disposed in a posture with the rotation center directed vertically and the suction port facing downward on the side of the inner container. Since the space below the bottom of the inner container can be reduced, the capacity of the inner container can be increased while suppressing the height of the product.

According to the second basic configuration of the present invention, a liquid discharge passage for discharging the liquid in the inner container disposed in the container main body from the bottom of the inner container to the outside of the container main body. And a pump-injection-type liquid container including an electric pump for liquid injection provided in the middle of the liquid injection passage, wherein the electric pump includes a drive-side magnet pivotally supported by a rotation shaft of a motor. An impeller having a driven-side magnet that rotates with the rotation of the drive-side magnet, the rotation center is inclined at a predetermined angle with respect to the vertical direction on the side of the inner container, and the suction port is directed downward. In this arrangement, the space below the bottom of the inner container can be reduced, so that the capacity of the inner container can be increased while suppressing the height of the product. In addition, the discharge port of the electric pump can be directed obliquely upward, and the occurrence of cavitation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing an upper part of a pump injection type liquid container according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a lower part of the pump liquid type liquid container according to the first embodiment of the present invention.

FIG. 3 is a front view showing a cross section of a part of the pump injection type liquid container according to the first embodiment of the present invention.

FIG. 4 is an enlarged sectional view showing the structure of the electric pump in the pump liquid injection type liquid container according to the first embodiment of the present invention.

FIG. 5 is a front view showing a cross section of a part of a pump injection type liquid container according to a second embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a lower part of a conventional pump injection type liquid container.

FIG. 7 is an enlarged cross-sectional view showing the structure of an electric pump in a conventional pump injection type liquid container.

[Explanation of symbols]

1 is a container body, 4 is an inner container, 7 is a liquid discharge passage, 37 is an electric pump, 41 is a pump chamber, 41a is a suction port, 41b
Is a discharge port, 42 is a rotor housing, 44 is a motor room,
45 is a motor housing, 46 is a motor, 49 is a driving magnet, 51 is an impeller, and 52 is a driven magnet.

Claims (2)

(57) [Claims] 1. A liquid discharging passage for discharging liquid in an inner container disposed in a container main body from the bottom of the inner container to the outside of the container main body, and a liquid discharging passage in the middle of the liquid discharging passage. A pump injection type liquid container including an electric pump for liquid injection provided therethrough, wherein the electric pump is driven by a driving magnet which is pivotally supported on a rotation shaft of a motor, and a rotation of the driving magnet. A pump provided with an impeller having a driven side magnet that rotates with the impeller, and disposed with a posture in which the center of rotation is directed vertically and the suction port is directed downward on the side of the inner container. Injectable liquid container. 2. A liquid discharging passage for discharging a liquid in an inner container disposed in a container main body from the bottom of the inner container to the outside of the container main body, and a liquid discharging passage in the middle of the liquid discharging passage. A pump injection type liquid container including an electric pump for liquid injection provided therethrough, wherein the electric pump is driven by a driving magnet which is pivotally supported on a rotation shaft of a motor, and a rotation of the driving magnet. And an impeller having a driven side magnet that rotates with the impeller, and the rotation center is inclined by a predetermined angle with respect to the vertical direction on the side of the inner container, and the suction port is arranged in a posture in which the suction port faces downward. A pump injection type liquid container characterized by the above-mentioned.