JPS61249419A - Pot - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Field of Industrial Application The present invention is applied to a heat-retaining pot (hereinafter referred to as a pot) for heating or boiling water.

0) Prior Art Generally, a pot includes an outer case, a container housed in the outer case, an outer lid attached to the outer case, and an air pump attached to the outer cover. In the air pump, a bellows and a coil spring are attached to a presser plate and a bottom plate that face each other at an interval above and below, and a ventilation passage communicating between the inner container and the inside of the bellows is provided in the bottom plate.

When the air pump of such a pot is operated, the contents are discharged regardless of the temperature of the contents of the inner container.

C) Problem to be solved By the way, even if hot water is poured into the pot, some time may pass, or the temperature of the water may drop immediately after adding cold water to the electric heating type (S boiler and keep warm) pot. The water is too lukewarm and unsuitable for making tea, etc. However, when people think that there is boiling water, they press the air pump or switch to produce hot water that is unsuitable for tea, coffee, etc. This results in wasted tea or coffee.

The present invention solves these problems and pours out the liquid in the pot, even if you press the air pump or switch.
The system is designed so that only hot water comes out, without the hot water being spit out after it cools down.

2) Means for Solving the Problems The pot of the present invention includes an outer case, a container housed in the outer case, an outer cover attached to the outer case, and an air pump attached to the outer cover. In the air pump, a bellows and a coil spring are installed between a presser plate and a bottom plate that face each other at an interval above and below, and a ventilation path communicating between the inner container and the inside of the bellows is formed in the bottom plate.

A spring member interposed to operate the air pump is made of a shape memory alloy member. The shape memory alloy (hereinafter referred to as SMA) is 〒1-
Heavy alloys, Cu-Zn-Al alloys, etc. are used.

Embodiment) First, a pot using an air pump will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of an electric heating type <S boiling heat retention) pot, in which a Ni-Ti alloy shape memory alloy spring 1 is used instead of the iron coil spring inserted into the air pump 11.
2 (hereinafter referred to as SMA spring) and adjustment piece 2
It is completely the same as a conventional pot except that 0 is inserted. That is, an outer lid 2 attached to an outer case 1 so as to be openable and closable is equipped with an air pump 11 of a bellows type or the like, and an inner container 3 made of stainless steel is housed inside the outer case 1 to pump water. This is a pot into which an inner lid 4 having a pipe 5 and a spout 6 is inserted.

A mounting recess 8 is formed in the upper plate 7 of the outer cover 2, and a press body 9 for operating a rose pump is loosely inserted in the upper plate 7 so as to be vertically movable. A shaft lO is vertically installed on the pressing body 9, which operates an air pump 11 via a pressing valve 13 to supply compressed air to the inner container 3 through the through hole 1B in the center of the bottom plate 18 and the through hole 17 in the inner lid 4. Blow air inside.

The air pump 11 includes a bottom plate 18 having the through hole 16 facing each other at an interval above and below, and a protrusion 14 of the pressure valve 13.
a presser plate 19 supported by the presser plate 19; a bellows connecting the bottom plate and the presser plate;
8 and S which is in contact with the pressure valve 13 and pushes up the presser plate 19
It consists of MA spring 12.

The SMA spring 12 is designed to undergo austenite transformation due to the through holes 1B and 17 when the temperature exceeds a certain level (for example, the contents are 80° C.), thereby increasing the tensile strength.

Furthermore, as shown in FIG. 2, the pressure valve 13 and the pressure plate 1 are
An adjustment piece 20 is removably interposed between the upper surface of the adjustment member 9 and the upper surface of the adjustment member 9 by means of a switching lever (not shown).

f) Function When water is first poured into the electric heating pot configured as above, the water temperature is lower than 80"C, so the SMA spring 12 is in a multisisite state and has low tensile strength, so the elastic force is weak and presses. When the body 9 is pushed, it deforms plastically and does not completely return to its original spring height, so it does not perform a pumping action.

Moreover, since the adjustment piece 20 is interposed between the pressure valve 13 and the presser plate 19, even if the presser plate 19 is pushed down, air will leak from both sides of the adjustment piece 2o. No air is generated (indicated by the solid line in No. 21!I).

When the water in the inner container is heated to 80°C or higher by the heater 21, the SMA spring 12 is heated to the austenite transformation point (Af point) or higher through the through holes 16 and 17 due to the rise in the temperature of the internal air and water vapor, and the elastic force is reduced. Increased spring function and spring height restored and spring action.

At the same time, the press valve 13, the adjustment piece 20, and the press plate 19, which are made of easily deformable materials such as St rubber and urethane rubber, are plastically deformed, and the center of the press valve 13 is completely brought into close contact with the press plate 19. Therefore, compressed air can be generated and sent to the wet surface even with the adjustment piece 20 (broken line in FIG. 2) inserted, and only hot water is discharged.

Also, if you are storing ice water in a pot, etc., use the switching lever (from hot water to cold water) using the adjustment piece 2.
If 0 is removed, pouring is possible even with water below 80°C.

Note that a valve, protrusion, groove, etc. may be used instead of the adjusting piece, and substantially the same effect can be obtained without using the adjusting piece.

g) Other embodiments In the above example, the SMA spring was inserted into the bellows, but the present invention is not limited to this, and other embodiments are also possible.

The spring inside the bellows uses the conventional steel spring 22 as it is, and the kip 23 is used as shown in FIG.
By forming a through hole 24 in the center of the shaft body 10 and inserting a pressing SMA spring 26 into the shaft body 10, substantially the same effect as in the previous example can be obtained.

h) Effects of the Invention The present invention provides a spring member for operating an air pump to produce compressed air, which is made of a shape memory alloy so that liquid contents such as hot water will not be discharged unless the temperature of the room exceeds a certain temperature. This prevents you from pouring lukewarm tea or coffee. Furthermore, by switching the switching lever to the cold water side as needed, even cold water such as ice water can be pumped out.

Furthermore, since the structure, number of parts, etc. are the same as conventional products, there is no change in cost and operability, and there is no need to change the manufacturing process, so conventional manufacturing equipment can be used as is. The industrial value is great.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the pot of the present invention. FIG. 2 is an enlarged sectional view of the pressure valve portion of FIG. 1. FIG. 3 is an enlarged cross-sectional view of the shaft portion in another embodiment. l... Exterior case 2... Outer lid 3, ψ, inner container 11... Air pump 12... Shape memory alloy spring 13... Pressure valve 16.17... Through hole 18...
... Bottom plate 19 ... Pressing plate 20 ... Adjustment piece 22 ... Coil spring 25 ... Shape memory alloy spring

Claims (1)

[Claims] The air pump includes an outer case, a container housed in the outer case, an outer cover attached to the outer case, and an air pump attached to the outer cover. A pot in which a bellows and a coil spring are installed between, and a bottom plate is provided with an air passage communicating between the inner container and the inside of the bellows, characterized in that the spring member that operates the air pump is made of a shape memory alloy. pot.