JPH064056B2 - Metal vacuum double bottle with underwater heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal thermos bottle used for keeping heat and cold of beverages and the like, and more particularly to a metal vacuum double bottle with an underwater heater having high heat keeping / cooling efficiency.

2. Description of the Related Art Conventionally, a metal vacuum double bottle with a submersible heater has an inner bottle inside an outer bottle, a vacuum space is maintained between the inner and outer bottles, and a heater section is provided at the inner bottom of the inner bottle. As a mounting structure for the heater part provided in the water, there is a structure in which a metal tube enclosing a heater is directly connected between the inner and outer bottles, as proposed in Japanese Utility Model Laid-Open No. 58-46532.

Problems to be Solved by the Invention According to the above-mentioned configuration, there is a drawback that the heat conduction amount between the inner and outer bottles is large and the heat efficiency is deteriorated. In addition, dew condensation water is generated inside the heater at the time of cold keeping, and the heat insulation is deteriorated due to the extinction. There was a drawback that I could not.

Means for Solving the Problems The present invention has been made in order to eliminate the above-mentioned drawbacks, and a heater is provided with a heat-sensitive element in close contact with the inner wall of the heater part integrally formed, and the heater has a moisture-proof structure.
The tube element can be used to display the hot water temperature and prevent burning.

Operation With the above-mentioned configuration, the amount of heat conduction at the mounting part of the heater part can be reduced, and since the heater has a moisture-proof structure, it can keep warm and cool with high heat retention efficiency and the hot water provided in the heater part. A thermosensitive element that senses the temperature can display the temperature of the hot water outside the body and protect the heater when it is air-fired, improving durability and usability.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The structure of this embodiment is as shown in FIGS. 1, 2 and 3. The metal vacuum double bottle is made of stainless steel or the like.
A space 3 is composed of an inner bottle 1 and an outer bottle 2 made of metal. Reference numeral 4 denotes a tip tube, which is integrally joined to the bottom portion of the outer bottle 2, and the space portion 3 serves as a vacuum space through the tip tube 4. The inner bottle 1 and the outer bottle 2 are welded together at the joint 7 at the upper part of the mouth 6 into which the beverage 5 is put, and further joined to the bottom at the joint 9 with the inner bottle 1 by a substantially cylindrical metal material having poor heat conduction such as stainless steel. A cylindrical inner cylindrical member 8 and a substantially cylindrical outer cylindrical member 10 that is joined to the outer bottle 2 at the joining portion 11, and the inner cylindrical member 8 and the outer cylindrical member 10 are further joined integrally at the joining portion 12. Has been done.

Therefore, the inner cylindrical member 8 penetrates the inner bottle 1 and the outer bottle 2 to form a communication hole 13 that communicates with the outside of the outer bottle 2, and
The inner cylindrical member 8 and the outer cylindrical member 10 constitute a space portion 14 communicating with the space portion 3. 15 is a heater part, which is installed in the communication hole 13 at the bottom of the inner bottle 1 via a packing 18 made of silicon or the like, has a lead withdrawing part 24 formed integrally with this heater part 15, and penetrates the communication hole 13. And lead lead-out part 24
Is fastened with washer 16 and nut 17, and is attached to inner bottle 1 in a watertight manner. At this time, the heater part 15 has packing 1
8, only contact with the joint 12 and washer 16,
The others are through the space of the communication hole 13 with the inner cylindrical member 8, and a part of the lead lead-out portion 24 and the heater portion 15 forms a space between the inner cylindrical member 8 to form a heat insulating structure. As shown in FIG. 2, the heater portion 15 is made of stainless steel having a bottomed cylindrical shape, and an upper cover 25 and a lower cover 26 are watertightly joined to each other at a joint portion 27 on the outer peripheral portion. A substantially cylindrical convex portion 28 is formed on the. Further, a pipe-shaped lead lead-out portion 24 made of a thin stainless material or the like is integrally provided at the center of a lower cover 26 made of stainless steel or the like. A cylindrical pressing plate 30 and a cord-shaped heater 31 wound around the outer periphery of the pressing plate 30 are inscribed on the inner surface of the cylindrical portion 29 of the upper cover 25, and the heater 31 is a notch formed in the pressing plate 30. Through the part 32, the inner space part 33 of the heater part 15
It is guided inside and is connected to the lead wire 35 at the connection portion 34. As shown in FIG. 3, the heater 31 includes a heating wire 37 and a core wire 36 made of a heat-resistant insulating material such as glass fiber or silicon rubber.
The heat-resistant insulating layer 38 made of silicon rubber or the like is wound on the outer circumference of the wire to provide a moisture-proof structure in which the Meg does not deteriorate due to the generation of dew condensation. The connection part 34
Similarly, the lead wire 35 also has a moisture-proof structure. Further, the thermosensitive element 20 made of a thermistor is thermally positioned inside the convex portion 28 and is fixed by a filling member 39 made of silicon rubber or the like. Like the heater 31, the heat-sensitive element 20 is also guided to the outside by a lead wire 40 having a moisture-proof structure so that even if dew condensation occurs in the space 33 formed in the upper cover 25 together with the lower cover 26, the MEG does not deteriorate. It was done. As described above, the heater portion 15 is the moisture-proof heater 31, the thermosensitive element.
In addition to incorporating 20, the lead lead-out portion 24 is made of a thin material such as a stainless steel material having a small diameter and poor heat conduction, so that the amount of heat radiation from the mounting portion of the heater portion 15 of the metal vacuum double bottle is small. None It is formed integrally. Thermal element
20 is heat-sensitively arranged on the upper surface of the convex portion 28 so that the hot water temperature can be sensed well, and the heater 31 is inscribed in the cylindrical portion 29 of the upper cover 25 in order to reduce the heat effect from the heater 31. At the very least, the heat sensitive element 20 is arranged in the central portion away from the heater 31 so that the temperature of the beverage 5 can be accurately sensed. 21 is a bottom frame, which is supported on the bottom of the outer bottle 2 and
A terminal 22 for supplying electricity to the heater section 15 is arranged on the bottom frame 21. Further, the mouth portion 6 of the joint portion 7 is provided with a plug 23 made of a heat insulating plastic for reducing heat radiation.

The operation of this embodiment having the above configuration will be described.

When the warm water is kept warm, when the beverage 5 such as hot water is put in the inner bottle 1 and electricity is supplied to the terminal 22, the heater 31 of the heater unit 15 generates heat to heat the beverage 5. At this time, since the temperature of the beverage 5 is composed of a thermos bottle having a vacuum in the space 3, the first is heat dissipation from the stopper 23, and the second is via the wall of the mouth 6 of the inner bottle 1. Conducted through the outer bottle 2, the third is radiated through the space 3, the fourth is radiated by conduction through the inner cylindrical member 8, and the fifth is the lead lead-out portion of the heater portion 15.
It can be divided into heat radiation through 24. The first to third divisions are heat radiation as a normal thermos, and the fourth and fifth divisions have high heat retention effect by reducing heat radiation. It is used as a thermos bottle. Therefore, when it is used as a heat insulator, the temperature of the beverage 5 can be arbitrarily set by energizing the heater unit 15 and by setting the wattage of the heater unit 15 arbitrarily. It can be kept warm at the temperature. Now, taking an example of a capacity of 1.0, the wattage of the heater 31 for keeping the hot water temperature at 95 ° C. constant may be about 3 to 5 W. Therefore, if the wattage of the heater 31 is set to about 8 W,
As shown in FIG. 4, when hot water of 90 ° C. at the initial temperature is put and electricity is applied, the hot water temperature rises as shown by the solid line A and can be maintained at about 100 ° C. At this time, the temperature of the water is detected by the heat sensitive element 20, and an indicator lamp (not shown) is turned on at 95 ° C or higher to
It is set to turn off the indicator lamp below ℃. Therefore, it is possible to inform the user whether the hot water temperature is 95 ° C or above. In addition, when electricity is continuously applied without a drink, or when the drink is exhausted and the product is in an idle state, the heat-sensitive element 20 senses and the heat-sensitive element 20
As shown by the dotted line B in FIG. 4, the temperature of the heater 31 is controlled by the silicon because the control circuit (not shown) is configured to control the energization to the heater part 15 so that the temperature becomes constant. The heat resistant temperature of rubber can be controlled below 180 ℃. When guarding cold water, the heater part 15 is cooled by the cold water and dew condensation occurs.
All of them have a moisture-proof structure and can be used normally.

In this embodiment, the function of the heat sensitive element 20 is to detect the temperature of the beverage 5 and display the lamp, and to control the energization of the heater 31 during baking, the operating temperature of the heater 31 is appropriately selected and set. By doing so, it is possible to adjust the temperature of the beverage.

EFFECTS OF THE INVENTION As described above, according to the present invention, the heat transfer amount of the heater part is reduced, the heater is a moisture-proof structure, and a heat-sensitive element is provided in the heater part. It is made of a metal that has the effect of improving the durability and usability by displaying the temperature of the hot water outside the body with a heat-sensitive element that senses the hot water temperature, and can also protect the heater during air burning. It is possible to obtain a vacuum double bottle.

[Brief description of drawings]

FIG. 1 is a sectional view of a metallic vacuum double bottle with an underwater heater showing an embodiment of the present invention, FIG. 2 is a sectional view of the same heater, FIG. 3 is a perspective view of the same heater, and FIG. 4 is the same temperature. It is a characteristic diagram. 15 ... Heater part, 20 ... Heat sensitive element, 31 ... Heater.

Claims (1)

[Claims] 1. A metal vacuum double bottle with a submersible heater, which is formed by an inner bottle and an outer bottle, has a vacuum in the space between the inner and outer bottles, and has a heater at the bottom, and a heater integrally formed. The heat sensitive element (20) is provided in close contact with the inner wall of the portion (15), the heater (31) is wound around the core wire (36) made of a heat resistant insulator, and the heat generating wire (37) is wound around the core wire (36). By covering with 38), it has a moisture-proof structure against dew condensation and the like generated in the heater part (15), and the thermosensitive element (20) can display the hot water temperature and prevent air burning. A metal vacuum double bottle with an underwater heater characterized by the following.