JPS6312821Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an electric pot that heats and keeps warm.

[Conventional technology]

Conventionally, electric pots have a heating element attached to the outer periphery of the lower end of the single-walled cylindrical inner container, and a single temperature controller fixed to the outer bottom of the inner container indirectly controls the temperature of the liquid inside the inner container. It was sensed and energized the heating element, but
This type of electric kettle boils water using a single temperature controller and senses the temperature to keep it warm, so the temperature sensing range is wide and it is difficult to obtain liquid at a high temperature at all times. In addition, since the temperature of the liquid is indirectly sensed, it is difficult to obtain the liquid at the desired temperature, and the single-walled inner container reduces the heat retention effect, making it uneconomical.

[Purpose of invention]

The present invention has been made in view of the above points, and the object is to provide an economical electric pot that can constantly obtain liquid at a high temperature.

[Structure of the idea]

According to the present invention, a vacuum double inner container with vacuum insulation between the inner and outer walls is provided, a heating element for boiling water and a heating element for keeping warm are arranged at the bottom of the inner container, and a heating element for heating water is provided at the upper end of the inner container. The objective is to be achieved by simply providing a water boiling temperature regulator that controls the energization of the water heater and a heat-retaining temperature regulator that controls the energization of the heat-retaining heating element.

[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 16 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 16 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. A projection 17 is provided.

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 19 at the upper end of the outer wall trunk, and a lower flat part 2 at the lower end of the outer wall trunk.
0.

The top flat part 19 of the outer wall has its tip welded to the outer circumference 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 lower flat part 20 of the outer wall has its tip connected to the inner wall 11.
A plurality of lower angles 22, 22 are welded to the outer periphery of the opening of the lower inner wall of the
has been established.

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 19 of the outer wall 12 of the inner container. There is.

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 bored in the center of the top of the chevron, and when the lower angle 22 is turned upside down, both ends are attached to the outer wall 12 of the inner container. It is spot welded to the lower flat part 20 of.

The draining member 4 has an opening in the center that communicates with the mouth at the upper end of the inner container, and a beak on which an inner stopper 5, which will be described later, is placed in the front part of the inner circumferential wall that forms this opening. A receiving part is provided that expands toward the upper end of the receiving part, a shoulder part is provided that extends outward from the upper end of the receiving part, and an outer peripheral wall part that hangs downward from the outer end of the shoulder part and comes into contact with the upper end of the exterior case 2 is provided. ing.

A through hole is bored at the rear end of the inner circumferential wall that forms the opening of the draining member to guide a temperature regulator lead wire 31 of the temperature regulator 9, which will be described later, into the gap between the outer case and the inner circumferential wall of the draining member. A through hole communicating with an upper pipe 34 of a liquid level display device 10, which will be described later, is bored at the tip.

The shoulder portion 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 a mounting flange at the lower end of the bolt hole.

The draining member 4 and the inner container are fixed by passing a bolt through a bolt hole in the shoulder of the draining member into a mounting flange and screwing into the upper angle of the inner container.

39 is a seal packing.

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

This cover plate 44 is attached to the lower surface of the inner plug main body, and has a through hole that communicates with the air circulation part of the inner plug main body.
An annular packing is provided on the outer circumferential end of the draining member so as to contact the upper end 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 has a hinge device 57 at the rear end of the draining member.
The inner circumferential surface is provided with a plurality of horizontal ribs that abut the lower end of the umbrella of the pusher body 50, which will be described later, to restrict the descent of the pusher body, and the center part of the upper surface has a plurality of horizontal ribs that extend downwardly. A guide tube 60 is provided vertically toward the target. A plurality of hanging ribs are provided on the outer periphery of the lower end of the guide tube at predetermined intervals and abut against the upper surface of the covering portion of the upper plate, which will be described later.

The bellows pump 40 has a bellows-shaped central outer periphery, opens at the center of the upper and lower ends, uses the upper end as an air intake port, and the lower end as an air outlet, and the peripheral wall forming the air outlet is fitted inside the rubber valve 64. Top plate screws are carved into the outer peripheral surface of the peripheral wall that forms the air inlet.

The upper plate 53 is made by integrally molding a covering part that covers the upper surface of the bellows pump 40, a cylindrical part hanging upward from the center of the covering part, and an annular square-shaped flange part extending from the top of the cylindrical part to the center. are doing. The lower inner circumferential wall of this cylindrical portion is provided with a screw that is screwed into the upper plate screw of the bellows pump.

The first spring 52 has its lower end in contact with the lower inner surface of the bellows pump 40 and its upper end in contact with the lower surface of the flange of the upper plate, thereby constantly pushing and expanding the bellows pump.

The pushing body 55 includes 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 rugged umbrella part is integrally molded.

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

The lower lid 51 is fitted to the inner periphery of the lower end of the upper lid,
An air exhaust hole is bored in the center of the lower end via a rubber valve. An annular hanging rib is provided on the outer periphery of the lower end of this air discharge hole.

The rubber valve is made of heat-resistant and corrosion-resistant synthetic resin material.
There is an annular groove on the outer periphery into which the air exhaust hole of the lower cover fits.
A cylindrical body part having an annular groove on the inner periphery into which the air discharge port of the bellows pump 40 is fitted and locked, and an annular hanging rib extending from the lower end outer periphery of the cylindrical body part and an air discharge hole in the lower cover. an upper flat part that contacts the lower surface; a bellows-shaped abdomen that contacts the inner periphery of the annular hanging rib of the lower lid from the tip of the upper flat part; A lower flat part that comes into contact with the outer periphery of the upper end of the flow part is integrally molded. The tip of this lower flat portion extends toward the inner side of 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. There is.

The bottom plate 88 is formed into a disk shape from a metal material such as an iron plate, serves also as a heat sink, and has its outer peripheral end in contact with the lower end surface of the peripheral wall forming the central opening of the bottom ring 87 . This bottom plate 88 has a joint member screw hole bored at a position on the peripheral wall 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 into a vertical cross-sectional shape, 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 a screw hole of the lower angle is bored 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 first 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 bottom plate. A second screw is screwed into the bottom plate screw hole of the joint member 89 from the lower end of the joint member screw hole to fix it.

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 is becoming.

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 that heats the liquid and a cover member 101 that surrounds the heater.

The heater 100 includes two heaters: a heater for boiling water of about 450W when boiling water, and a heater for keeping warm water of about 10W when keeping it warm.

The covering member 101 includes a disc part that covers the heater 100 and a cylindrical part that passes through the lower end opening of the inner container. A distribution pipe 104 is inserted through the inner container and communicates with a first holder 94 of a liquid level display device 10, which will be described later, through the other end of the inner container.

Reference numeral 105 is a waterproof and heat insulating packing formed into a cylindrical body, and has 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 portion of the cover member 101 has an annular protrusion bored on the upper outer periphery and a screw carved on the lower outer periphery, and is directed into the annular waterproof and heat insulating packing 105 stretched over the lower end opening of the inner container. The nut 109 is screwed onto the screw of the cylindrical body by pressing down from inside the inner container until the screw of the cylindrical body protrudes outside the inner container.

This covering member 101 includes a waterproof insulation packing 105
It is supported by the protrusion of the cylindrical body inside the inner container and the nut 109 outside the inner container via the inner container, and is tightly attached to the lower opening of the inner container.

Lead wires 93, 93 for heating elements for boiling water and for keeping warm the heater 100 pass through the cylindrical part of the covering member 101 while being surrounded by insulators, and are connected to a plug receiver 110, a water boiler, and lamps 111, 112 for keeping warm, which will be described later. are doing.

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

The temperature controller 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 surrounding the sensor. Covering member 1
14 and a lead wire 31 for the temperature controller.

The sensor 113 is composed of a thermistor, a thermal reed switch, or the like, and includes a water boiling detection sensor that detects the water 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 115 screwed onto a screw on the outer circumference of the rear end.

One terminal of the temperature regulator lead wire 31 connected to the sensor 113 for boiling water detection is connected to the heater 100 for boiling water and the lamp 111 for boiling water, and controls the energization of the heater for boiling water as well as blinking the lamp for boiling water. , a temperature regulator lead wire 31 connected to the heat retention detection sensor 113
One terminal is connected to the heater 100 and the heat-retaining lamp 112, and controls the energization of the heat-retaining heater and blinks the heat-retaining lamp.

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

The upper pipe 34 has one end communicating with the upper part of the inner container through the upper pipe through hole of the draining member 4, and the other end communicating with the liquid level display tube 11 through the fourth holder 116.
7, 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 1.
20, 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; 123 is a cover that covers the front part of the pot together with the auxiliary pipe;
A vertical cutout is made in the front part of the front panel, and a transparent plate is placed over the cutout part. 24 is a handle.

[Effect of idea]

Separate temperature regulators are provided for boiling water and keeping it warm, so the temperature range of the liquid during boiling and keeping it warm can be limited to a very narrow range, making it possible to obtain high-temperature liquid at any time.

In addition, the temperature regulators for boiling water and keeping warm are both located at the upper end of the inner container, making it easy to obtain liquid at the desired temperature.Moreover, the double-walled inner liquid has excellent heat retention and is extremely economical. It is.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of an embodiment of the present invention. 1...Electric pot, 3...Inner container, 8...Heating element, 9...Temperature controller.

Claims (1)

[Scope of utility model registration request] In an electric pot equipped with an inner container surrounded by an outer case, a heating element that heats the liquid in the inner container, and a temperature regulator that controls energization of the heating element,
A double vacuum inner container with vacuum insulation between the outer walls is provided, a heating element for boiling water and a heating element for keeping warm are arranged at the bottom of the inner container, and the energization of the heating element for heating water is controlled at the upper end of the inner container. 1. An electric pot characterized by being equipped with a heat-retaining temperature regulator that controls energization of a heat-retaining heating element.