JPS6336972Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric pot that utilizes air pressure.

[Conventional technology]

Conventionally, electric pots that use air pressure have a heating element fixed to the outer periphery of an inner container surrounded by an outer case, a draining member attached to the top of the outer case, and an inner stopper removably attached to the central opening of the draining member. Then, a top cover with a built-in bellows pump is attached to the upper end of the draining member so that it can be opened and closed, and the air outlet of the bellows pump and the air circulation part of the inner stopper are connected through a rubber valve fitted to the air outlet of the bellows pump. The compressed air in the bellows pump is supplied into the inner container through the air circulation part of the inner stopper by the pressure of the bellows pump.
The liquid in the inner container is discharged to the outside of the pot body through the pumping pipe, the liquid distribution part in the inner stopper, and the discharge pipe.In this type of pot, the lower end surface of the rubber valve that comes into contact with the top surface of the inner stopper expands outward. The elasticity of the rubber valve is severely weakened during long-term use, creating a gap between the rubber valve and the top surface of the inner plug, causing steam to constantly pass between the top surface of the inner plug and the rubber valve. In order for the compressed air inside to escape through this gap, the discharge amount had to be drastically reduced.

[Purpose of invention]

The present invention has been devised in view of the above points, and it is an object of the present invention to provide an electric pot using pneumatic pressure that can maintain a desired discharge amount without air leakage even during long-term use.

[Structure of the idea]

According to the present invention, a hanging rib is provided on the outer periphery of the lower end of the central opening of the lower lid, an annular groove on the outer periphery into which the central opening of the lower lid is fitted into the upper part of the rubber valve, and an inner groove into which the lower end opening of the bellows pump is fitted and locked. A cylindrical body portion having a circumferential annular groove is provided, and a flat upper surface portion extending from the outer periphery of the lower end of the cylindrical body abuts the lower surface between the central opening of the lower lid and the annular hanging rib, and the flat upper surface portion is provided. The bellows-shaped abdomen extending from the tip of the inner plug contacts the inner periphery of the annular hanging rib of the lower lid, and the flat lower part extending inward from the lower end of the abdomen contacts the outer periphery of the upper end of the air circulation part on the upper surface of the inner plug. It attempts to achieve its purpose through configuration alone.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

The electric pot 1 includes an inner container 3 surrounded by an outer case 2, and a drainage member 4 connected to the upper end of the outer case.
, an inner stopper 5 that is detachably attached to the center opening of the drainer, an upper lid case 6 that can be opened and closed to the upper end of the drainer, and a bottom member 7 that covers the bottom of the inner container at the lower end of the outer case. A heating element 8 that heats the liquid inside the container, and a temperature controller 9 that turns the heating element ON and OFF by sensing the temperature of the liquid inside the inner container or the atmospheric air.
and a liquid amount display device 10 that displays the amount of liquid in the inner container.
It is composed of.

The exterior case 2 is made of a thin iron plate formed into a cylindrical shape.
The upper and lower ends are curled inward to provide a gap with the inner container 3.

The inner container 3 has an inner wall 11 made of metal such as stainless steel, and an outer wall 1 with a wide opening at the center of the upper end and a narrow opening at the center of the lower end.
It consists of two parts, of which the outer walls are vacuum insulated. The inner wall 11 includes a cylindrical inner wall trunk, an upper inner wall mouth part which is curved inward from the upper end of the inner wall trunk and whose upper part has a diameter slightly smaller than the diameter of the inner wall trunk, and an inner wall mouth part which is curved inward from the upper end of the inner wall trunk, and an upper inner wall mouth part which is curved inward from the upper end of the inner wall trunk and has a diameter slightly smaller than the diameter of the inner wall trunk. The lower part is integrally molded with a lower inner wall mouth portion having a diameter smaller than that of the upper inner wall mouth portion.

A lower annular projection having a diameter smaller than the diameter of the inner wall trunk is provided at the lower end of the inner wall trunk of the inner wall, and an upper annular projection having a diameter smaller than the diameter of the upper inner wall opening is provided at the lower end of the upper inner wall opening. has been established.

The outer wall 12 is formed at a predetermined distance from the inner wall 11, and includes a cylindrical outer wall trunk, an upper flat part at the upper end of the outer wall trunk, and a lower flat part at the lower end of the outer wall trunk. .

The tip of the upper flat portion of the outer wall is welded to the outer periphery of the upper inner wall opening of the inner wall 11, and a plurality of upper angles 21, 21 are provided on the circumferential surface at predetermined intervals. The tip of the lower flat portion of the outer wall is welded to the outer periphery of the mouth of the lower inner wall of the inner wall 11, and a plurality of lower angles 22, 22 are provided on the circumferential surface at predetermined intervals.

The upper angle 21 is formed by bending an elongated flat plate into a longitudinal cross-sectional shape, and a bolt hole is bored in the center of the top of the chevron shape, and the hems at both ends are spot welded to the upper flat part of the outer wall 12 of the inner container. ing.

Like the upper angle 21, the lower angle 22 is formed by bending an elongated flat plate into a vertical cross-sectional shape.A screw hole is drilled in the center of the top of the chevron, and when the lower angle is turned upside down, both ends are connected to the outer wall of the inner container. It is spot welded to the lower flat part of No. 12.

The drain member 4 has an opening in the center that communicates with the mouth of the upper end of the inner container, and an inner peripheral wall portion 26 that forms this opening.
A beak portion 27 on which the inner stopper 5 described later is placed is provided in the front part, and a receiving part 28 that expands upward except for the front part.
and a shoulder portion 2 extending outward from the upper end of the receiving portion.
9 is provided, and an outer peripheral wall portion 30 that hangs downward from the outer end of the shoulder portion and abuts the upper end of the exterior case 2 is provided.

At the rear end of the inner circumferential wall portion 26 forming the opening of the draining member, there is provided a temperature regulator lead wire 3 of the temperature regulator 9, which will be described later.
1 into the gap between the outer case and the inner circumferential wall of the draining member, and the tip is provided with a through hole that communicates with the upper pipe 34 of the liquid level display device 10, which will be described later. .

The shoulder portion 29 of the draining member 4 is provided with a plurality of bolt holes corresponding to the upper angles 21, 21 of the inner container, and mounting flanges 37, 37 at the lower ends of the bolt holes.

The draining member 4 and the inner container are fixed by passing bolts through bolt holes in the shoulders of the draining member into the mounting flanges 37, 37 and screwing them into the upper angle of the inner container.

39 is a seal packing.

The inner stopper 5 includes an inner stopper main body 41 equipped with an air circulation part that guides air in a bellows pump 40 (described later) into the inner container and a liquid flow part that guides the liquid in the inner container, and an upper end that is connected to the inner stopper main body for liquid circulation. A pumping pipe 42 whose lower end hangs down into the inner container, a discharge pipe 43 whose rear end communicates with the liquid distribution section of the inner stopper body and whose other end leads to the outside of the pot, and an inner circumferential wall at the center of the drainage member. It consists of a cover plate 44 made of stainless steel that closes the upper end of the section.

This cover plate 44 is attached to the lower surface of the inner plug main body 41, has a through hole that communicates with the air circulation part of the inner plug main body, and has an annular packing 45 on the outer peripheral end that contacts the upper end of the inner peripheral wall of the draining member. It is set up.

The annular packing 45 has a shape corresponding to the upper end circumferential surface of the inner circumferential wall of the draining member, and has an abutting part 46 that comes into contact with this circumferential surface, and a pleat part 49 that hangs diagonally downward toward the inner side from the lower end of the abutting member. It is integrally molded. The tip of this pleat has a diameter smaller than the diameter of the inner circumferential wall of the draining member.

The upper lid case 6 includes an upper lid 50, a lower lid 51, a bellows pump 40, a first spring 52 that constantly pushes and expands the bellows pump, an upper plate 53 that is screwed onto the upper surface of the bellows pump, and an upper end of the upper plate. A pushing body 55 that fixes the abutting part 54, a second spring 56 that constantly pushes up the pushing body, a hinge device 57 that hinges the upper lid case to the draining member, and locks the upper lid case to the upper end of the draining member. It consists of a locking device 58.

The upper lid 50 is swingably attached to the rear end of the draining member via a hinge device 57, and has a plurality of holes on its inner circumferential surface that abut the lower ends of the umbrellas of the pushing bodies 50, which will be described later, to restrict the descent of the pushing bodies. A horizontal rib is provided, and a guide cylinder 60 is vertically provided at the center of the upper surface. A plurality of hanging ribs are provided on the outer periphery of the lower end of the guide cylinder at predetermined intervals and abut against the upper surface of the cover of the upper plate, which will be described later.

The bellows pump 40 has a bellows-shaped central outer periphery, openings at the center of the upper and lower ends, and an air intake port 6 at the upper end.
2. The lower end is an air exhaust port 63, the peripheral wall forming the air exhaust port is fitted inside the rubber valve 64, and upper plate screws are carved on the outer peripheral surface of the peripheral wall forming the air intake port.

The upper plate 53 is integrally formed with a cover which covers the upper surface of the bellows pump 40, a cylindrical part which hangs down from the center of the cover, and an annular L-shaped flange which extends from the top of the cylindrical part to the center. The inner peripheral wall of the lower part of the cylindrical part is threaded to screw into the upper plate screw of the bellows pump.

The first spring 52 has a lower end connected to the bellows pump 4
The bellows pump is in contact with the inner surface of the lower part of the inside of the bellows pump, and its upper end is in contact with the lower surface of the flange of the upper plate to constantly push and expand the bellows pump.

The pushing body 55 has a pressing part on the top surface, a cylindrical part that hangs downward from the tip of the pressing part and moves up and down within the guide cylinder of the upper lid 50, and a part that expands below the guide cylinder from the lower end of the cylindrical body. The ivy umbrella part is integrally molded.

An abutting part 54 that abuts the upper end of the flange part of the upper plate 53 is fixed to the lower center surface of the pressing part with screws, and a steam vent hole 75 is bored in the front part. This contact portion 54 is in close contact with the upper end of the flange portion of the upper plate only when the pusher is pressed through the seal member 76.
A gap for air circulation is normally provided between the upper end of the flange portion and the upper end of the flange portion.

A plurality of vertically elongated holes are bored in the circumferential surface of the umbrella portion of the pusher body, through which the hanging ribs of the guide tube pass. A notch is provided on the outer peripheral edge of the umbrella part of the pusher body so that it does not come into contact with the upper end of the horizontal rib of the upper cover when the pusher body is lowered. The outer circumferential end of the notch is brought into contact with the upper end of the horizontal rib, and the pusher is rotated to align the notch and the horizontal rib when pressed.

The second spring 56 has a lower end in contact with the upper surface of the flange portion of the upper plate, and an upper end in contact with the lower surface of the pusher, and constantly pushes the pusher upward.

The lower lid 51 fits on the inner periphery of the lower end of the upper lid, and has an air discharge hole 79 bored in the center of the lower end via a rubber valve 64. An annular hanging rib 80 is provided on the outer periphery of the lower end of this air discharge hole.

The rubber valve 64 is made of a heat-resistant and corrosion-resistant synthetic resin material, and as shown in FIG. 2, has an annular groove 81 on its outer periphery into which the air exhaust hole 79 of the lower cover is fitted, and an air exhaust port 63 of the bellows pump 40 on its inner periphery. A cylindrical body part 83 having an annular groove 82 into which the cylindrical body is fitted and locked; and an upper surface extending from the outer periphery of the lower end of this cylindrical body part and abutting the lower surface between the air discharge hole 79 of the lower cover and the annular hanging rib 80. A flat part 84 and a bellows-shaped abdomen 85 that comes into contact with the inner periphery of the annular hanging rib 80 of the lower lid from the tip of this upper flat part.
and a middle plug 5 extending inward from the lower end of the abdomen.
It is integrally molded with a lower surface flat part 86 that comes into contact with the outer periphery of the upper end of the air circulation part at the upper end. This lower surface flat part 86
The tip extends inward toward the center.

The bottom member 7 consists of a bottom ring 87 with a central opening that contacts the lower end of the outer case, a bottom plate 88 that closes the center opening of the bottom ring, and a joint member 89 interposed between the bottom plate and the bottom of the inner container. .

The bottom plate 88 is formed into a disk shape from a metal material such as an iron plate, and is also used as a heat dissipation plate, and the outer peripheral end is connected to the bottom ring 8.
It is in contact with the lower end surface of the peripheral wall forming the central opening of 7. The bottom plate 88 has a joint member screw hole formed in a peripheral wall position opposite to the bottom plate screw hole of the joint member 89.

The joint member 89 is made by bending a flat metal plate such as an iron plate to have a vertical cross section, and a central hole is bored in the center of the top of the chevron shape into which a heating element lead wire 93 and a first holder 94, which will be described later, can be inserted. A lower angle screw hole communicating with the screw hole of the lower angle is drilled on the peripheral surface of the bottom of the inner container facing the lower angle 22.

Screw holes for the bottom plate that communicate with the screw holes for the joint member of the bottom plate 88 are bored in the hem portions of both ends of the joint member, respectively.

The joint member 89 and the inner container 3 are fixed by screwing a screw from the lower end of the lower angle screw hole of the joint member into the screw hole of the lower angle 22 of the inner container, and the joint member and the bottom plate 88 are connected to the joint member of the bottom plate. joint member 89 from the lower end of the screw hole.
It is fixed by screwing it into the screw hole for the bottom plate.

The outer case 2 and the bottom ring 87 are clamped together by bolting the draining member 4 and the upper angle 21 of the inner container 3 and by screwing the lower angle 22 of the inner container and the bottom plate 88 via a joint member 89. It's summery.

The heating element 8 passes through the bottom opening of the inner container and is fixed to the inner bottom of the inner container, and consists of a heater 100 for heating the liquid and a cover member 101 surrounding the heater.

Heater 100 is approximately 450W when boiling water and approximately 450W when keeping warm.
It has two 10W.

The covering member 101 includes a disk portion that covers the heater 100 and a cylindrical portion that passes through the lower end opening of the inner container. The first holder 9 of the liquid level display device 10, which will be described later, is inserted through the inner container and the other end is connected to the outer bottom of the inner container.
A distribution pipe 104 communicating with 4 is inserted therethrough.

Reference numeral 105 is a waterproof and heat insulating packing formed into a cylindrical body, and provided with upper and lower pleats on the outer periphery of the upper and lower ends, respectively, which extend outward and sandwich the lower end opening of the inner container from the inside and outside.

The cylindrical body part of the cover member 101 has an annular projection bored on the upper outer periphery and a screw carved on the lower outer periphery. A nut is screwed onto the screw of the cylindrical body by pressing down from inside the container until the screw of the cylindrical body protrudes outside the inner container.

This cover member 101 is supported by a protrusion of the cylindrical body inside the inner container and a nut outside the inner container via a waterproof and heat insulating packing 105, and is tightly attached to the lower opening of the inner container.

The heating element lead wire 93 of the heater 100 passes through the cylindrical portion of the cover member 101 while being surrounded by an insulator, and connects to a plug receiver 110, a water boiler, and a heat-retaining lamp 11, which will be described later.
1,112.

Reference numeral 110 is a plug holder connected to the rear lower end of the outer case, and 111 and 112 are lamps for boiling water and keeping warm.

The temperature regulator 9 is suspended and supported at the upper part of the inner container, and includes a temperature sensor 113 that detects the liquid or atmospheric air in the inner container and turns the heating element on and off, and a sensor cover surrounding the sensor. Member 11
4 and a temperature controller lead wire 31.

The sensor 113 is composed of a thermistor, a thermal reed switch, or the like, and includes a boiling detection sensor that detects the boiling temperature and a heat retention detection sensor that detects the heat retention temperature.

The sensor covering member 114 is hollow inside and covers the sensor 113 at its tip, and its rear end, which has a screw cut into its outer periphery, passes through a through hole at the rear end of the inner peripheral wall of the draining member 4. This sensor covering member 114 is suspended and fixed to the rear end of the inner circumferential wall of the draining member with a nut screwed onto a screw on the outer circumference of the rear end.

One terminal of the temperature regulator lead wire 31 connected to the boiling detection sensor 113 is connected to the heater 100 and the water boiling lamp 111,
One terminal of the temperature regulator lead wire 31 connected to the heat retention detection sensor 113 is connected to the heater 100 and the heat retention lamp 112.

The liquid level display device 10 includes an upper pipe 34, a fourth holder 116, a liquid level display tube 117, a third holder 118, a connecting pipe 119, a second holder 120, a lower pipe 121, and a first holder 94. and a distribution pipe 104, including an upper pipe 34, a connecting pipe 119, and a lower pipe 12.
1. The flow pipe 104 is made of a heat-resistant and corrosion-resistant material and is formed into a hollow shape, and the fourth and first holders are made of a heat-resistant and corrosion-resistant material.
It is made of a corrosion-resistant elastic material and is hollow and has an L-shaped longitudinal section.

The liquid quantity display tube 117 is formed of a transparent pipe made of glass, acrylic resin, or the like.

The upper pipe 34 has one end connected to the upper part of the inner container through the upper pipe through hole of the draining member 4, and the other end connected to the liquid level display tube 117 through the fourth holder 116.
The lower end of the liquid level display tube 117 communicates with the connecting pipe via the third holder 118, and the other end of the connecting pipe 119 communicates with the second holder 12.
0, the other end of the lower pipe 121 communicates with the distribution pipe 104 via the first holder 94, and the other end of the distribution pipe 104 passes through the center of the cover member 101 of the heating element 8. and communicates with the inner bottom of the inner container 3.

122 is an auxiliary pipe that guides the liquid from the tip of the discharge pipe 43 downward, and 123 is a cover that covers the front part of the pot together with the auxiliary pipe. A transparent board is installed.

[Effect of idea]

In this invention, since the flat part of the bottom surface of the rubber valve faces inward and contacts the top surface of the inner plug, even if the rubber valve is pushed outward by the steam inside the inner container, it will not reach the top surface of the inner plug. There is no gap created by separating the lower flat portion of the rubber valve, and the desired discharge amount can be obtained even during long-term use without air leakage as the valve is always in close contact with the flat portion of the rubber valve.

Furthermore, since the abdomen of the rubber valve is shaped like a bellows with high elasticity, even if the elasticity of the material of the rubber valve deteriorates due to the steam inside the inner container, the elastic effect of the bellows will not be hindered. Therefore, even during long-term use, the pressing force of the bellows pump can be directly used to suck up the liquid in the inner container, and the desired discharge amount can be reliably maintained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the invention, and FIG. 2 is an exploded longitudinal sectional view showing the main parts of the invention. 1...Electric pot, 2...Exterior case, 3...
Inner container, 4...Draining member, 5...Inner stopper, 6...Upper lid case, 8...Heating element, 40...Bellows pump, 64...Rubber valve.

Claims (1)

[Scope of utility model registration request] An inner container equipped with a heating element is provided, a drainage member is fitted to the upper end of an outer case surrounding the inner container, an inner stopper is removably attached to the central opening of the drainage member, and a bellows pump is attached to the upper end of the drainage member. Attach the built-in top cover so that it can be opened and closed freely, fit a rubber valve into the center opening of the bottom cover that covers the bottom surface of the top cover, insert the air outlet of the bellows pump into the rubber valve, and release the bellows by pressure from the bellows pump. The compressed air inside the pump is supplied into the inner container through the air circulation part in the inner stopper, and the liquid in the inner container is discharged to the outside of the pot via the pumping pipe, the liquid circulation part in the inner stopper, and the discharge pipe. In the electric pot, an annular hanging rib is provided on the outer periphery of the lower end of the central opening of the lower lid, and an annular groove on the outer periphery into which the central opening of the lower lid is fitted into the upper part of the rubber valve and the lower end opening of the bellows pump is fitted. A cylindrical body portion having an inner circumferential annular groove for locking is provided, and a flat upper surface portion extending from the outer periphery of the lower end of the cylindrical body portion is brought into contact with the lower surface between the central opening of the lower lid and the annular hanging rib, The bellows-shaped abdomen extending from the tip of the upper flat part contacts the inner periphery of the annular hanging rib of the lower lid, and the lower flat part extending inward from the lower end of the abdomen contacts the outer periphery of the upper end of the air circulation part on the upper surface of the inner plug. An electric pot that uses pneumatic pressure.