JPH05115373A - Lid body of electric kettle - Google Patents

Abstract

PURPOSE:To stabilize the capacity to conduct compressed air of the lid body of an electric kettle to blow the compressed air to a water tank in order to discharge hot water. CONSTITUTION:In a lid 22 provided with a pump 14 to conduct compressed air to a sealed water storage tank, the pump 14 is fitted in such a manner that the inside wall or external wall of the opening of the pump 14 is fixed at the cylindrical rib 19 provided in the lid cover 18 by constricting the elastic member 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid of an electric water heater for sealing a water tank and feeding compressed air into the water tank to supply hot water in the water tank.

[0002]

2. Description of the Related Art In recent years, a pump type electric water heater for sending compressed air to a water storage tank in which hot water is sealed is shown in FIGS.
The structure shown in Fig. 2 was common. Referring to FIG. 5, a pump 1 for sending compressed air for tapping hot water.
The check valve 5 and the biasing member 6 that biases the check valve 5 are set inside the pump 1, and the bellows 2, the lid cover 3 and the pump upper plate 4 are welded all around. Thus, the constituents of the pump 1 are shown. Further, referring to FIG. 6A, a pump 9 including a check valve 7 and a biasing member 8 for biasing the check valve 7, a claw 10 provided at the tip of the pump 9, and an elastic member 11 are provided. FIG. 6B shows a structure in which the cover cover 12 is mechanically attached to the attachment hole 13 of the lid cover 12 by rotating the attachment cover 13 via the.

[0003]

SUMMARY OF THE INVENTION Such a conventional configuration as shown in FIG.
In the lid body constructed by welding as shown in FIG. 1, the pump 1 is constructed by welding the bellows 2, the lid cover 3 and the pump upper plate 4 all around, so that the pump 1 must be welded well. Air leakage occurs in the water tank, reducing the ability to send compressed air to the water tank. Further, since the urging member 6 for urging the check valve 5 is set in the pump 1 and then welded, when the urging member 6 is welded, a force acts in a direction to prevent the welding, and the welding is performed well. In order to do so, the skill and skill of the worker were required. Furthermore, the work variation among workers was likely to occur.
Further, in the conventional lid body configured to be mechanically attached as shown in FIG. 6, the claw 10 provided at the tip of the pump 9 is provided with the elastic member 11.
Since there is residual stress in the claw 10 provided at the tip of the pump 9, the pump is exposed to high temperature for a long time during heat retention because it is mechanically attached to the attachment hole 13 of the lid cover 12 via the. Then, the claw 10 is deformed by the elastic force of the elastic member 11, and the elastic member 11 that seals between the pump 9 and the lid cover 12 fails to function, causing air leakage and compressing the water tank. The ability to pump air is reduced.

The present invention solves such a problem, and it is a first object of the present invention to provide a lid for an electric water heater having a stable ability to send compressed air to a water tank regardless of the skill and skill of the operator. Has the purpose of.

A second object is to improve the sealability of the pump and the lid cover to stabilize the ability to send compressed air to the water tank.

A third object is to improve workability when the pump is attached to and removed from the lid cover via an elastic member.

A fourth object is to prevent hot water from entering the pump as vapor and condensing again to leave residual water in the pump.

[0008]

In order to achieve the first object, the present invention provides a lid provided with a pump for sealing a water tank capable of storing water and sending compressed air to the water tank. The inner wall or the outer wall of the opening portion of the pump is connected to the cylindrical rib provided on the lid cover by contracting the elastic member and fixed.

In order to achieve the second object, the inner wall or the outer wall of the opening portion of the pump is connected to the cylindrical rib provided on the lid cover to fix the pump by contracting the elastic member. The cross section of the elastic member is set to have a U shape.

In order to achieve the third object, a rib which is continuous to the outer circumference of the pump and a continuous groove or rib corresponding to the rib which is continuous to the outer circumference of the outer wall of the pump are provided on the elastic member. Is.

Further, in order to achieve the fourth object, the height of the cylindrical rib provided on the lid cover is set to be equal to or lower than the height of the inner wall of the opening portion of the pump.

[0012]

With the above construction, the present invention can provide the lid of the electric water heater having the stable first ability to send the compressed air to the water tank by the first means regardless of the skill and skill of the operator.

Further, by the second means, the pump and the cover cover are
The sealability can be improved and the ability to send compressed air to the water storage tank can be stabilized.

The third means improves the workability when the pump is attached to and removed from the lid cover via the elastic member.

Further, by the fourth means, it is possible to prevent hot water from entering the pump as vapor and condensing again to leave residual water in the pump.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. In FIG. 1, the pump 14 is provided with a check valve 15 at one end, and is further provided with a biasing member 16 for biasing contraction of the check valve 15 and the pump 14. The other end is covered with a lid cover 18 via an elastic member 17 having a U-shaped cross section.
It is attached to a cylindrical rib 19 provided on the. Further, as shown in FIG. 2, the height dimension X of the cylindrical rib 19 is
Is set to be lower than the height dimension Y when the elastic member 17 is attached to the pump 14. 20 is a push plate 21
Is a pump upper plate for providing a gap between the pump 14 and the check valve 15. The lid 22 is configured as described above.

FIG. 2 is a detailed sectional view of the elastic member 17 provided in the pump 14 and the cylindrical rib 19 provided in the lid cover 18. The elastic member 17 is the outer dimension A of the cylindrical rib 19. The contraction portion 23 has an inner engagement dimension B with a contraction margin. Further, as shown in FIG. 3, a continuous convex portion 2 is formed on the outer periphery of the mounting portion 24 of the elastic member 17 of the pump 14.
5, the elastic member 17 has a groove 2 corresponding to the convex portion 25.
Have 6. FIG. 3 shows that the lid 22 of the present invention is attached to the water tank 28 via the packing 27.

In the above structure, the pump 14 and the lid cover 18 are mounted by deforming the contracting portion 23 of the elastic member 17 provided in the pump 14 by the cylindrical rib 19 provided in the lid cover 18. , Pump 14 and lid cover-1
8 is sealed and attached, the pump 14 can easily attach the pump 14 and the lid cover 18 and assemble the lid 21 regardless of the skill of the operator.

Further, at the time of assembling, first, the pump 14 is attached to the elastic member 17, and the groove 26 of the elastic member 17 is fitted into the continuous convex portion 25 of the pump 14 to assemble.
Since the elastic member 17 can be removed from the pump 14, workability can be improved.

When an external force F is applied to the push plate 20 in order to discharge hot water from the water storage tank 28, the urging member 16 contracts and the check valve 15 seals the opening of the pump 14 so that the pump 14 is closed. The volume of air is sent into the water storage tank 28 through another opening, and the hot water in the water storage tank 28 is discharged. At this time, the external force F applied to the push plate 20 in the direction of pressing the lid cover 18 is applied to the elastic member 17 provided in the pump 14 through the urging member 16, so that the pump 14 and the lid cover-1.
8 is sealed vertically. Therefore, since the pump 14 and the lid cover 18 are sealed at two places, the sealability can be improved and the compressed air of the pump can be reliably sent to the water storage tank 28 to stabilize the hot water discharge.

Further, the steam generated from the water storage tank 28 during boiling and keeping warm enters the pump 14 through the packing 27 because the water storage tank 28 and the lid 22 are sealed. A part of the vapor that has entered the pump 14 passes through the gap between the pump 14 and the check valve 15 provided by the pump upper plate 21, and is discharged into the air through the gap between the sliding portion of the push plate 20 and the lid 22. However, most of the steam that has entered the pump 14 is condensed again and remains in the pump. The remaining water is the height dimension X of the cylindrical rib 19 of the lid cover 18.
However, since it is set to be lower than the height dimension Y when the elastic member 17 is attached to the pump 14, the water tank 28 is again set.
Returned inside. In this way, the steam generated from the water storage tank 28 is returned to the water storage tank 28 again, so that the decrease in the amount of water due to evaporation can be almost eliminated.

[0022]

As is apparent from the above embodiments, the first
In a lid equipped with a pump for sealing the water tank capable of storing water and sending compressed air to the water tank, a cylindrical rib provided on a lid cover for mounting the pump is attached to an inner wall of an opening portion of the pump. Alternatively, by contracting and fixing the outer wall by connecting and fixing the elastic member, it is possible to provide a lid of an electric water heater with a stable ability to send compressed air to a water tank regardless of the skill or skill of the operator. it can.

Also, the second member of the pump is attached to a cylindrical rib provided on the lid cover, and the inner wall or the outer wall of the opening of the pump is contracted and connected to the elastic member and fixed. By setting the cross-sectional shape of U to the shape of U, the sealability of the pump and the lid cover can be improved, and the ability to send compressed air to the water tank can be stabilized.

Further, the pump is made elastic by providing a rib continuous to the outer circumference of the outer wall of the pump of the third means and a continuous groove or rib corresponding to the rib continuous to the outer circumference of the outer wall of the pump in the elastic member. The workability when attaching to the lid cover through the member is improved.

Further, by setting the height of the cylindrical boss provided on the lid cover of the fourth means to be lower than the height of the inner wall of the opening of the pump, hot water enters the pump as steam. It is possible to prevent the residual water remaining in the pump due to re-condensation.

[Brief description of drawings]

FIG. 1A is a detailed sectional view of a lid of an electric water heater according to an embodiment of the present invention, and FIG. 1B is an enlarged sectional view of part A in FIG.

FIG. 2 is an exploded sectional view of a main part of a lid of an electric water heater according to an embodiment of the present invention.

FIG. 3 is an exploded sectional view of essential parts of the pump.

FIG. 4 is an overall sectional view of an electric water heater according to an embodiment of the present invention.

FIG. 5 is a detailed sectional view of a first example of a lid of a conventional electric water heater.

FIG. 6A is a detailed cross-sectional view of a second example of a lid of a conventional electric water heater, and FIG. 6B is an exploded perspective view of a main part.

[Explanation of symbols]

 14 Pump 16 Biasing Member 17 Elastic Member 18 Lid Cover 19 Cylindrical Rib 22 Lid 23 Shrinking Part 25 Convex Part 26 Groove 27 Packing 28 Water Tank

Claims (4)

[Claims] 1. A lid provided with a pump for feeding compressed air to the water storage tank, the water storage tank being sealed.
A lid for an electric water heater, in which an inner wall or an outer wall of an opening portion of a pump is connected to a cylindrical rib provided on a lid cover for fixing the pump so that the elastic member is contracted and fixed. 2. A cross-sectional shape of the elastic member is U when the inner wall or the outer wall of the opening of the pump is contracted and connected to a cylindrical rib provided on the lid cover to fix the pump. The lid of the electric water heater according to claim 1, wherein the lid is set in the shape of. 3. A pump is attached to a cylindrical rib provided on a lid cover, and when an inner wall or an outer wall of an opening of the pump is contracted and fixed by an elastic member, the outer wall of the pump is continuously connected. The lid of the electric water heater according to claim 1, wherein the rib and the elastic member are provided with a continuous groove or rib corresponding to the continuous rib on the outer periphery of the outer wall of the pump. 4. When the pump is attached to a cylindrical rib provided on the lid cover and the inner wall or the outer wall of the opening of the pump is fixed by connecting the elastic member by contracting the elastic member, the lid is provided on the lid cover. The lid of an electric water heater according to claim 1, wherein the height of the cylindrical rib is set to be equal to or lower than the height of the inner wall of the opening of the pump.