JP3023108B1 - Pump mounting structure for liquid container - Google Patents

Abstract

An object of the present invention is to improve efficiency of assembling work of a pump by fixing a pump of a liquid container such as an electric water heater without using a screw. SOLUTION: A heat shield plate 15 is interposed between the bottom of an inner container 2 and the bottom of an exterior body 1, and a downward heat shield plate rib provided on the heat shield plate 15 and a pump rib provided upward on a pump 19 are provided. 3
8 are engaged with each other, and the bottom rib 41 provided on the bottom of the exterior body 1 is brought into contact with the lower surface of the pump 19.
The rising portion 43 of the bottom rib 41 is fitted to the outer periphery of the pump 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump mounting structure for a liquid container such as an electric pot.

[0002]

2. Description of the Related Art An electric pump for discharging liquid is provided in a liquid container such as an electric pot. The electric pump is generally disposed between the lower surface of a heat shield plate attached to the lower surface of the inner container and the bottom of the exterior body below the inner surface, and has a mounting structure fixed to the heat shield plate with screws. . The suction port of the electric pump is connected to the liquid outlet of the inner container, and the discharge port is connected to the liquid discharge passage.

[0003]

When the pump mounting structure as described above is adopted, a screw tightening step is required when setting the pump in the product manufacturing process, and the heat shield plate resonates with the vibration of the pump during use. Noise could occur.

Accordingly, an object of the present invention is to improve the manufacturing efficiency and to suppress the generation of noise during use by employing a mounting structure that does not use screws for the pump set.

[0005]

In order to solve the above-mentioned problems, the present invention provides an inner container inside an outer package, and installs a pump between the inner container and the outer package. Connect the suction port to the liquid outlet on the bottom of the inner container,
In a pump mounting structure for a liquid container, wherein a discharge port of the pump is connected to a liquid discharge passage opened to the outside of the exterior body, a partition is provided between a bottom of the inner container and a bottom of the exterior body, The downward rib provided on the partition and the upward rib provided on the pump are engaged with each other, and the bottom rib provided on the bottom of the outer package is brought into contact with the lower surface of the pump. The pump is configured to be fitted to an outer peripheral portion of the pump.

The suction passage from the suction port of the pump to the inlet of the impeller chamber is constituted by an impeller case and an impeller lid case fitted on the lower surface thereof. A bottom receiving portion formed on the bottom rib is brought into contact with a lower surface of the impeller lid case, and a rising portion formed on the bottom rib is fitted to an outer peripheral portion of the impeller lid case. Can be.

The partition rib is formed downward by cutting and raising a part of the partition, and a downwardly open fitting recess is provided in the partition rib, and the pump rib is provided in the fitting recess. Can be adopted.

Further, the pump is an electric centrifugal pump, and a pump body including a motor portion and an impeller portion is housed between the outer body and the inner container, and an impeller case and a suction passage are formed. The impeller lid case may be configured to extend between the partition and the bottom of the exterior body.

The suction port of the pump and the liquid outlet of the inner container, and the discharge port of the pump and the liquid discharge passage are opposed to each other with a predetermined gap therebetween, and are respectively formed on the outer peripheral surfaces of these opposed portions. A configuration in which an elastic tube is fitted and connected may be employed.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Although the electric pot shown in the accompanying drawings is shown turned upside down, this is for convenience of understanding, and the up-down relationship in the following description is based on the up and down in the erect state of the electric pot. .

In the electric pot according to the embodiment, an inner container 2 is housed inside an exterior body 1 as in a conventional electric pot. The exterior body 1 includes a body member 3 surrounding the inner container 2, a bottom member 4 fitted to the bottom of the body member 3, and a shoulder member 5 fitted to the upper part of the body member 3. The inner container 2 is fixed by the shoulder member 5 and the bottom member 4. A beak portion 6 is provided at a front portion of the shoulder member 5, and a liquid discharge port 7 is provided at the beak portion 6. A liquid discharge passage 8 is provided in the liquid discharge port 7.
The tip of is facing. Also, inside the shoulder member 5,
A safety valve set 9 is provided in the middle of the liquid discharge passage 8. Although not shown, an opening / closing lid is attached to the shoulder member 5.

A bottom opening 11 provided at the center of the bottom member 4 is closed by a closing plate 12. The closing plate 12
An annular guide groove 13 is provided along the outer periphery of the shaft, and a rotation support ring 14 is fitted into the guide groove 13. The electric pot is rotatably supported by placing the rotation support ring 14 on a support surface such as a table.

FIG. 2 shows a state in which the bottom member 4 and the body member 3 are being removed from the assembly. In this figure, inner container 2
In addition to a heat shield plate 15 attached to the lower surface of the device, an insulator 16 attached to the heat shield plate 15, a thermal fuse 17, a control board unit 18 shown in an exploded state, and the like, a pump 19 appears.

FIG. 3 shows a mounting structure of the thermal fuse 17 described above. This thermal fuse 17 is
Are held down by a pair of cut-and-raised claws 17a, and the protrusions 17b provided between the cut-and-raised claws 17a prevent slipping out.

As shown in FIG. 4, a liquid outlet 21 is provided protruding downward at a portion near the outer periphery of the bottom surface of the inner container 2, and a cutout portion 22 surrounding the liquid outlet 21 is provided with the heat shield plate 15 as described above. Is provided. A heat shield plate rib 23 is provided near the notch 22 by cutting and raising. This heat shield plate rib 23 has a fitting recess 24 opened downward.

As shown in FIGS. 5 (a) and 5 (b), the pump 19 has an impeller 25 and a motor 26 which constitute a centrifugal pump arranged vertically so that their rotation axes are oriented vertically. Impeller case 27 containing 25
And a motor case 28 accommodating the motor 26 are connected by screws 29, and the impeller case 2
7, the impeller lid case 31 is fitted from below and integrated by welding.

The impeller case 27 and the impeller lid case 3
1 form a suction passage 33, and the suction passage 3
An impeller chamber entrance 32 leading to 3 is formed below the impeller 25. Further, an upward suction port 34 is provided in the impeller case 27 at the tip of the suction passage 33. Also, the impeller 25 described above is attached to the impeller case 27.
The discharge port 35 communicating with the inside of the storage section is provided upward.

As shown in FIG. 6A, the above pump 1
9 and the liquid outlet 21 of the inner container 2 are opposed to each other with a small gap δ in the vertical direction, and an elastic tube 36 such as a rubber tube is fitted into both of them.
4 and the liquid outlet 21 are connected. In addition, the above-mentioned discharge port 35
And the lower end of the liquid discharge passage 8 is opposed to the liquid discharge passage 8 with a minute gap δ in the vertical direction, and the elastic tube 37 is fitted and connected.

The lower surface of the impeller lid case 31 forming the suction passage 33 is formed flat as shown in FIGS. 5A and 6A, and the impeller case 27 forming the suction passage 33 is formed. A pump rib 38 is provided to protrude upward from the upper surface of the pump. To reinforce the pump rib 38, reinforcing portions 39 are provided at both ends (see FIG. 4).

The pump rib 38 is fitted into the fitting recess 24 of the heat shield plate rib 23. The fitting of the pump rib 38 and the fitting recess 24 prevents upward movement of the pump 19 and prevents the elastic tube 3 on the suction port 34 side from moving upward.
Rotation about the center 6 is prevented. In this case, the discharge port 3
Since the liquid discharge passage 8 connected to the elastic tube 37 on the fifth side is not firmly supported, the pump 19
To a small extent.

On the other hand, the pump 19
A bottom rib 41 is provided so as to face the lower surface of. Bottom rib 41
Is composed of five ribs as shown in FIG.
The second bottom rib 41 a is formed below the impeller chamber entrance 32 so that both ends thereof reach the outside of the impeller lid case 31 across the impeller chamber entrance 32. In addition, the second bottom rib 41b is connected to the first bottom rib 41a.
Is formed so as to reach the outside of the impeller lid case 31 at right angles to. The third bottom rib 41c intersects the first bottom rib 41a at a fixed inclination angle and is formed to reach the outside of the impeller lid case 31 in the same manner. The fourth bottom rib 41d protrudes in a direction opposite to the third bottom rib 41c, and reaches the outside of the impeller lid case 31 beyond the discharge port 35. The fifth bottom rib 41e is
The central portion of the suction port 34 reaches the outside of the impeller lid case 31.

As shown in FIG. 6A, the bottom rib 41 rises upward at a lower surface receiving portion 42 in contact with the lower surface of the impeller lid case 31 and at a portion protruding outside the impeller lid case 31. And a rising portion 43.
The lower surface receiving portion 42 prevents the downward movement of the pump 19, and the effect of preventing the downward movement is combined with the effect of preventing the upward movement due to the fitting of the heat-insulating plate rib 23 and the pump rib 38.
9 is performed in the vertical direction. Further, the rising portion 43 surrounds the outer peripheral portion of the pump lid case 31 at six places in the drawing, thereby preventing the pump 19 from moving in the horizontal direction. With this rising portion 43,
The positioning of the pump 19 in the horizontal plane is performed.

The mounting structure of the pump in the electric pot according to the embodiment is as described above. In the process of assembling the product, as shown in FIG.
4 and the discharge port 35 are connected to the liquid outlet 21 and the liquid discharge passage 8 by elastic tubes 36 and 37, respectively, and the pump rib 38 is fitted to the heat shield plate rib 23.

At this time, by providing a gap δ between the elastic tubes 36 and 37, contact between the suction port 34 and the liquid outlet 21 and contact between the discharge port 35 and the liquid discharge passage 8 are avoided.

Further, when the bottom member 4 is fitted to the body member 3 as shown in FIG.
Each of the lower surface receiving portions 42 abuts on the lower surface of the impeller lid case 31, and the rising portion 43 fits on the outer periphery thereof.

By completing the above steps and assembling, the pump 19 is positioned vertically and horizontally without using screws, and is fixed at a predetermined position.
Further, since the heat shield plate 15 and the pump 19 only make point contact or line contact at the engagement portion between the heat shield plate rib 23 and the pump rib 38, the vibration of the pump 19 is less likely to be transmitted to the heat shield plate 15. Thus, resonance of the heat shield plate 15 can be suppressed. The elastic tube 3 is provided between the suction port 34 and the liquid outlet 21 and between the discharge port 35 and the liquid discharge passage 8.
The vibrations of the pump 19 are damped by these elastic tubes 36 and 37 because they are connected by 6 and 37.

Further, by providing the elastic tubes 36 and 37 with a gap δ, contact between the suction port 34 and the liquid outlet 21 and contact between the discharge port 35 and the liquid discharge passage 8 can be avoided. Is prevented from being generated due to the noise.

The above-mentioned electric pot has a configuration in which the body member 3 and the bottom member 4 are formed by different members.
In some cases, these two members are integrated into one member.

In the above embodiment, the mounting structure of the pump for a liquid container having a heating device such as an electric pot has been described. However, a similar structure can be adopted for a liquid container having no heating device. However, when a heating device is not provided, it is not appropriate to refer to a “heat shield plate”. Therefore, a generic term corresponding to the heat shield plate is referred to as a “partition wall”.

[0030]

As described above, according to the present invention, as means for fixing the pump, the connection between the liquid outlet of the inner container and the suction port, the engagement between the pump rib and the partition rib, and the contact between the bottom rib and the lower surface of the pump. By adopting the means of contact and fitting between the bottom rib and the outer peripheral portion of the pump, the pump can be fixed at a predetermined position without using a screw, and the production efficiency can be improved.

Further, since the contact between the partition and the pump is a point contact or a line contact, the vibration of the pump is not easily transmitted to the heat shield plate, and the generation of abnormal noise due to the resonance of the partition can be prevented.

Further, the vibration of the pump is suppressed by connecting the liquid outlet and the liquid discharge passage facing the suction port and the discharge port of the pump by elastic tubes, respectively, and by the presence of a required gap at the connection portion. In addition, generation of abnormal noise can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric water heater according to an embodiment in an assembling process.

FIG. 2 is an exploded perspective view showing another assembly process of the electric water heater according to the embodiment.

FIG. 3A is a plan view of a thermal fuse part according to the first embodiment; FIG. 3B is a sectional view taken along line bb in FIG.

FIG. 4 is a perspective view of a liquid outlet part of the above.

FIG. 5 (a) is a sectional view of a pump part according to the embodiment; FIG. 5 (b) is a plan view of FIG.

6A is a cross-sectional view of a pump part according to the embodiment; FIG. 6B is a cross-sectional view taken along line bb in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer body 2 Inner container 3 Body member 4 Bottom member 5 Shoulder member 6 Beak part 7 Liquid discharge port 8 Liquid discharge passage 9 Safety valve set 11 Bottom opening 12 Closure plate 13 Guide groove 14 Rotation support ring 15 Heat shield plate 16 Insulator 17 Temperature fuse 17a Cut-and-raised portion 17b Projection 18 Control board unit 19 Pump 21 Liquid outlet 22 Notch 23 Heat shield plate rib 24 Fitting recess 25 Impeller 26 Motor 27 Impeller case 28 Motor case 29 Screw 31 Impeller lid case 32 Impeller Room inlet 33 Suction passage 34 Suction port 35 Discharge port 36 Elastic tube 37 Elastic tube 38 Pump rib 39 Reinforcement part 41 Bottom rib 42 Lower surface receiving part 43 Standing part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Go Osuka 1-20-5 Tenma, Kita-ku, Osaka Zojirushi Ma Hobin Co., Ltd. Field surveyed (Int. Cl. ⁷ , DB name) A47J 27/21 101

Claims (5)

(57) [Claims] Claims: 1. An inner container is provided inside an outer package, a pump is installed between the inner container and the outer package, and a suction port of the pump is connected to a liquid outlet on a bottom surface of the inner container. In a pump mounting structure for a liquid container, wherein a discharge port of the pump is connected to a liquid discharge passage opened to the outside of the exterior body, a partition is provided between a bottom of the inner container and a bottom of the exterior body, The downward rib provided on the partition and the upward rib provided on the pump are engaged with each other, and the bottom rib provided on the bottom of the outer package is brought into contact with the lower surface of the pump. A pump mounting structure for a liquid container, wherein the pump mounting structure is fitted to an outer peripheral portion of the pump. A suction passage extending from a suction port of the pump to an inlet of the impeller chamber is constituted by an impeller case and an impeller lid case fitted to a lower surface of the impeller case; Pump rib, the lower surface receiving portion formed on the bottom rib was brought into contact with the lower surface of the impeller lid case, and the rising portion formed on the bottom rib was fitted to the outer peripheral portion of the impeller lid case. The pump mounting structure for a liquid container according to claim 1, wherein: 3. The partition rib is formed downward by cutting and raising a part of the partition, and a downwardly open fitting recess is provided in the partition rib, and the pump rib is provided in the fitting recess. The pump mounting structure for a liquid container according to claim 1 or 2, wherein 4. The pump according to claim 1, wherein the pump is an electric centrifugal pump, and a pump body including a motor part and an impeller part is housed between the outer body and the inner container, and an impeller case forming the suction passage. The pump mounting structure for a liquid container according to any one of claims 1 to 3, wherein an impeller lid case extends between the partition and the bottom of the exterior body. 5. A suction port of the pump and a liquid outlet of the inner container, and a discharge port of the pump and the liquid discharge passage are opposed to each other with a predetermined gap, and an outer peripheral surface of the facing portion. The pump mounting structure for a liquid container according to any one of claims 1 to 4, wherein an elastic tube is fitted and connected to each other.