JPH0436754Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to an air-type thermos for boiling hot water in which hot water is boiled in a vacuum double container equipped with a heating element, and the hot water is flowed out of a spout using compressed air from an air pump. [Prior art] A water pumping method in which a vacuum layer is provided between an inner cylinder and an outer cylinder, a liquid such as water in the inner cylinder is boiled by a heating element, and one end is communicated with the inside of the inner cylinder by operating an air pump. A pot disclosed in Japanese Utility Model Application Publication No. 61-54730 is known as an air-powered thermos for pouring hot water from a spout through a channel. This pot is equipped with a vacuum double container made of metal whose inner and outer cylinders are vacuum insulated, and a heater is installed at the bottom of this container to heat and keep the liquid inside the container warm.
A cover plate is provided which fixes a discharge member for discharging the liquid inside the container to the outside and covers the mouth of the metal container, and a lid body with a built-in bellows pump is provided, which covers the lower surface of the lid body and communicates with the bellows pump. It is equipped with a cover plate with a central opening and a temperature regulator that detects the boiling temperature and heat retention temperature of the hot water. Furthermore, in Japanese Utility Model Publication No. 60-28346, a heater dedicated to heating and keeping warm is wound around the outer periphery of the lower end of a single tank to boil and keep the water warm, and an inlet communicating with the tank at one end is connected to a pot at the other end. A steam escape path is formed that has a steam hole facing the outside from a certain position, and a body that opens and closes this steam relief path in response to the movement of the bellows is provided, and the generated steam is discharged from the steam hole provided in the upper cover near the pushing body. However, an air-type water boiling pot is disclosed in which an appropriate amount of hot water in a container is taken out from a spout by compressing a bellows. [Problems with the prior art] By the way, in the former case, a large amount of steam generated by the boiling of hot water passes through the inner stopper, inside the bellows, and is discharged from the steam vent hole provided at the top of the pushing body. A problem arises in that the bellows deteriorates due to heat. Furthermore, since steam is discharged from the top of the pushing body, there is a risk of inadvertent contact with the steam resulting in burns. Furthermore, the lid body made of stainless steel located under the bellows is a lid body for fixing the inner stopper.
No consideration is given to heat loss at the mouth. The latter type of air-type kettle is equipped with an opening/closing body that controls the steam passage to prevent the pressure from rising inside the container due to the generated steam and to prevent thermal deterioration of the bellows, but the steam that is discharged is Since the steam is discharged from the steam vent provided in the upper lid nearby, there is a risk of burns if touched accidentally when operating the pusher. Moreover, since the pot consists of a single container with no insulation structure and a lid with no insulation structure, the temperature of the hot water will drop unless the heater is constantly energized, which is uneconomical. Since it is relatively tall, there is a risk of it falling over. [Means for Solving the Problems] The present invention consists of a metal vacuum double container with a mouth formed at the upper end, a heating element for heating a liquid provided in the vacuum double container, and the vacuum double container described above. a lid that is removably attached to the mouth of the lid, a bellows-type air pump that is installed inside the lid near the top and pumps air to the vacuum double container, and a stainless steel cover that is installed on the outer surface of the lower part of the lid. , a steam exhaust path which is installed inside the lid and outside the air pump, one end of which is connected to the lower part of the lid and the other end is open inside the spout cover; a steam detector installed outside the spout to control the power supply to the heating element; a pumping channel whose one end is connected to the bottom of the vacuum double container and the other end to the spout; an opening/closing body for opening and closing the steam exhaust passage; a lower part of the lid body is located below the upper edge of the mouth of the vacuum double container; and at least a part of the steam exhaust passage and the opening/closing body are connected to the vacuum It is located below the upper edge of the mouth of the double container. [Function] The steam path is normally in a communicating state, and the heating element is controlled by the steam detector. On the other hand, when the air pump is activated, the opening/closing body closes the steam path, allowing air to be pumped without escaping to the outside. [Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings. In the figure, 1 is a vacuum double container, which consists of an inner cylinder 2 with a stainless steel bottom and an outer cylinder 3.
A vacuum layer 4 is provided between the inner cylinder 2 and the outer cylinder 3. The bottoms of the inner cylinder 2 and the outer cylinder 3 are connected by a Π (inverted cup)-shaped connecting member 5. The bottom surface of the connecting member 5 is brazed in contact with the bottom outer surface of the inner cylinder, and the mouth edge of the connecting member 5 penetrates the outer cylinder 3 and is brazed to the outer cylinder 3. A plate-shaped heater 6 which is a heat generating body having a neck is provided inside the inner cylinder 2, and the neck of the heater 6 is passed through the inner cylinder 2 and the connecting member 5.
It is watertightly attached by a nut 7 screwed onto the neck. 6A is a thermostat for keeping warm, and 8 is a packing. Note that the upper air heater 6 is connected to a power source at a predetermined location. Further, a communication pipe 9 passing through the inner cylinder 2 and the outer cylinder 3 is attached to the inner cylinder 2 and the outer cylinder 3 in a watertight manner by welding. Inner cylinder 2 of this communication pipe 9
One inner end of the heater 6 is located a predetermined distance above the upper surface of the heater 6, and the other end projects outside the outer cylinder 3. Both ends of the communication pipe 9 are gently tapered to a diameter slightly smaller than the middle part of the communication pipe 9, so that they can be easily fitted into the inner cylinder 2 and the outer cylinder 3 during manufacturing, and are connected to the lower end of the communication pipe 9. It is made easy to fit into the elbow 10. 11 is an exterior body that houses the vacuum double container 1. A transparent glass pipe 14 rising upward is guided and connected to the communicating pipe 9 via elbows 10 and 12 made of silicone rubber and a stainless steel pipe 13 so as to extend along the side surface of the outer cylinder 3.
A water stop mechanism 16 is connected to the upper end of the glass pipe 14 via a joint 15 above the water level when the water in the inner cylinder 2 is at maximum storage. A pumping channel 18 reaches the spout 17 from the elbows 10, 12, stainless steel pipe 13, glass pipe 14, etc.
form. Also, a water pipe 20 is connected to the upper end of the water stop mechanism 16 via an elbow 19 made of silicone rubber, and this water pipe 20 communicates with the spout 17 formed in the exterior body 11 and opening downward. There is. A window 21 made of transparent acrylic is provided at a position of the exterior body 11 corresponding to the glass pipe 14, and the water level inside the glass pipe 14, which indicates the amount of water inside the inner tube 2, can be seen through this window 21. There is. Further, a lid 23 made of synthetic resin is detachably provided on the mouth 22 of the vacuum double container 1, and a lower part 24 of the lid 23 is attached to the upper edge 22 of the mouth of the vacuum double container 1.
Located below A. This lid body 23 is the exterior body 1
A female screw 25 is formed on the circumference near the upper edge of the lid body 23, and a male screw 26 is formed on the outer peripheral surface of the lid body 23, and the lid body 23 is attached by these screws 25 and 26. A stainless steel cover 24 is provided on the outer surface of the lower part 24 of this lid body 23.
Attach A. A base plate 27 is installed horizontally in the middle of the lid 23, a movable plate 28 is horizontally installed above the base plate 27, and a bellows-type air pump 29 that can be expanded and contracted is provided between the movable plate 28 and the base plate 27. A return spring 30 is installed inside the bellows type air pump 29. On the movable plate 28 is a pusher body 31 in the shape of an inverted cylinder with a bottom that appears on the top surface of the lid body 23.
is inserted into the recess 32 so as to be vertically movable. and 33
is interposed between the movable plate 28 and the pusher 31, and the pusher 31
This is a spring that urges the Also, press body 3
A cylindrical body 34 is installed vertically at the center of the back side of 1, and this cylindrical body 3
4, the opening/closing body 35 is inserted so as to be vertically movable. This opening/closing body 35 has a cylindrical shaft portion 36 at the top, an opening/closing main body 37 is provided at the bottom, and the opening/closing main body 37 is provided below by the upper edge 22A of the opening. 37A is a packing fitted onto the opening/closing main body portion 37. This opening/closing main body portion 37 is located below the upper edge 22A of the mouth portion. Reference numeral 38 denotes an edge fixedly provided inside the lower end of the cylindrical body 34, and 39 denotes a locking protrusion formed outside the upper end of the cylindrical shaft portion 36 and capable of locking with the edge 38. Further, a pressing spring 40 is provided between the bottom of the cylindrical shaft portion 36 and the back surface of the pushing body 31. Lid body 2 with one end provided below the mouth upper edge 22A
3, and the other end is connected to an exhaust port 43 facing into the spout cover 42 to form a steam exhaust path 44. Further, an L-shaped partition wall 45 is formed above the communication port 41, and the communication port 41 is formed in a horizontal portion 45A of the partition wall 45.
A communication hole 46 is formed in the vertical portion 45B to communicate the inside of the bellows type air pump 29 and the communication port 41, and a ventilation hole 47 is formed in the vertical portion 45B for communication between the inside of the bellows type air pump 29 and the communication port 41. A guide hole 48 is provided in a portion of the substrate 27 facing the hole 46 to guide the opening/closing main body 37 so that the communicating hole 46 can be opened and closed. That is, the opening/closing main body part 37 and the communication hole 4
6 and the ventilation hole 47, the ventilation hole 47 is normally closed by the opening/closing main body part 37 and the packing 37A, while the communication hole 46 is opened to discharge steam. Conversely, when the pushing body 31 is pressed, the opening/closing main body 37 closes the communication hole 46 and opens the ventilation hole 47, and air can be pumped into the vacuum double container 1 by compression by the bellows type air pump 29. Furthermore, a heat insulating material 49 such as polystyrene foam is provided inside the lid body 23 near the lower part 24. This heat insulating material 49 is located below the upper edge 22A of the mouth of the vacuum double container 1. Further, a thermostat 50, which is a steam detector, is attached to a portion of the spout cover 42 facing the exhaust port 43. Note that 51 has one end connected to the lid body 23.
This is a stopper that moves forward and backward so that it can be inserted. Next, the operation of the above structure will be explained. After storing water W in the inner cylinder 2, the lid body 23 is rotated and fixed with screws 25 and 26. In this state, since no steam is generated, the thermostat 50 senses the low temperature, supplies power to the heater 6, and heats the water W.
Then, when steam S is generated after a while, this steam S flows through the communication port 41, the communication hole 46, and the steam exhaust path 4.
4 and is discharged into the spout cover 42 from the exhaust port 43. When the thermostat 50 is heated by the discharged steam S, generation of steam is detected by the temperature detection, and the heater 6 is controlled by cutting off the power or the like. When the pushing body 31 is pressed in the boiling state, the opening/closing main body 37 and the packing 37A close the communication hole 46 and at the same time open the ventilation hole 47, and the compressed air generated by the compression of the bellows type air pump 29 flows into the ventilation hole 47. , are forced into the inner cylinder 2 through the flow port 41. The pumped air allows the boiling water W to pass through the pumping channel 18 and be poured into a cup or the like from the spout 17. As described above, in the air-type water boiling thermos having the lid body 23 incorporating the vacuum double container 1, the heater 6, and the bellows-type air pump 29, the pipe-shaped steam exhaust passage 44 is provided outside the bellows-type air pump 29. As a result, the steam S can be guided to the thermostat 50, and thermal deterioration of the bellows type air pump 29 can be prevented. Furthermore, the lower part 24 of the lid 23 is connected to the vacuum double container 1.
Since it is located below the upper end 22A of the mouth part, the length for heat insulation of the lid body 23 (heat conduction distance L in the mouth part 22) can be increased, and heat loss due to heat conduction can be reduced. In addition, the lower part of the opening/closing body 35 that responds to the operation of the bellows-type air pump 29 provided on the lid body 23, the packing 37A, and the guide hole 48 are provided at a position below the upper edge 22A of the mouth of the vacuum double container 1. , the total height can be lowered, safety can be improved, and a compact thermos flask can be created. Moreover, by providing the heat insulating material 49 inside the lid body 23 near the lower part 24, the heat insulating effect of the heat insulating material 49 can be exerted in the mouth portion 22, and higher heat retention is possible. Furthermore, by attaching a stainless steel cover 24A to the lower surface of the lower part 24 of the lid body 23, the lid body 23
Thermal deterioration of the synthetic resin member forming the lower part 24 can be prevented, and limescale etc. will be less likely to adhere, thereby improving sanitary conditions. Next, experimental results related to the present invention will be explained. condition

【table】

[Table] As shown above, high heat retention can be achieved by setting the heat conduction distance L to 10 mm or more.

[Table] As shown above, by setting the heat conduction distance L to 10 mm or more, the heat retention capacity is approximately half that of the 35W power consumption of a single-layer container during heat retention. [Effects of the invention] The present invention comprises a metal vacuum double container with a mouth formed at the upper end, a heating element for heating the liquid provided in the vacuum double container, and a heating element provided in the mouth of the vacuum double container. A detachable lid, a bellows-type air pump installed near the top of the lid to pump air into the vacuum double container, a stainless steel cover provided on the lower surface of the lid, and the lid. a steam exhaust path which is installed inside the air pump and outside the air pump, one end of which is connected to the lower part of the lid body and the other end of which is open inside the spout cover; a steam detector for controlling power supply to the heating element; a pumping channel having one end connected to the bottom of the vacuum double container and the other end to the spout; and a steam exhaust channel responsive to the air pump. The lower part of the lid is located below the upper edge of the mouth of the vacuum double container, and the steam exhaust path and at least a part of the lid are connected to the vacuum double container. Since the opening is located below the upper edge of the opening, it is possible to provide an air-type water boiling thermos that is compact and highly safe, as well as providing higher heat retention than the conventional technology.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view. 1... Vacuum double container, 6... Heater, 17...
Outlet, 18... Pumping channel, 22... Mouth, 22A
... Upper edge of mouth, 23 ... Lid body, 24 ... Lower part, 2
4A...Stainless steel cover, 29...Bellows type air pump, 35...Opening/closing body, 44...Steam exhaust path, 49...Insulating material, 50...Thermostat (steam detector), S...Steam, W ……water.

Claims (1)

[Claims for Utility Model Registration] (1) A metal vacuum double container with a mouth formed at the upper end, a heating element for heating a liquid provided in the vacuum double container, and an opening of the vacuum double container. a bellows-type air pump installed near the top of the lid for pumping air to the vacuum double container; a stainless steel cover provided on the bottom surface of the bottom of the lid; A steam exhaust passage is provided inside the lid body and outside the air pump, and has one end connected to the lower part of the lid body and the other end opened inside the spout cover, and a steam exhaust passage in the middle of this steam exhaust passage or at the exhaust port. A steam detector installed on the outside to control the power supply to the heating element, a pumping channel whose one end is connected to the bottom of the vacuum double container and the other end to the spout, and a steam detector which discharges the steam in response to the air pump. an opening/closing body for opening and closing the passage, and a lower part of the lid body is located below the upper edge of the mouth of the vacuum double container, and at least a part of the steam exhaust passage and the opening/closing body are connected to the vacuum double container. An air-type water boiling thermos flask characterized by being located below the upper edge of the mouth of the container. (2) The air-type water boiling thermos flask according to claim 1 of the utility model registration claim, characterized in that the lid body is provided inside a heat insulating material near the lower part of the lid body.