KR960004061Y1 - Cooker - Google Patents

Abstract

No content.

Description

Steam Hole Using Shape Memory Alloy

1 is an exploded perspective view of a conventional rice cooker.

2 is a cross-sectional view of a conventional rice cooker steam hole shown in FIG.

3 is an exploded perspective view and an assembly perspective view of a steam hole using a shape memory alloy according to the present invention.

4 is an operation state of the steam hole using the shape memory alloy according to the present invention.

5 is a perspective view of a rice cooker with a steam hole according to the present invention.

* Explanation of symbols for main parts of the drawings

10: rice cooker 12: body

14: lid 16: contact plate

17: through hole 18: fastening pin

20: steam hole 21: fastener

22: steam inlet 23: fastening groove

40: steam hole body 42: fastening portion

44: seating portion 45: guide groove

46: cylinder portion 47: through hole

48: locking portion 49: internal locking jaw

49 ': External locking jaw 50: Compression spring

60: piston 61: piston body

62: bottom plate 64: guide

66: side outlet 68: upper outlet

70: shape memory alloy spring 80: support means

82: bottom plate 84: fastening piece

85: piston pin 86: hanging piece

88: settling groove 90: Barking

The present invention relates to a steam hole attached to the rice cooker, and relates to a steam hole using a shape memory alloy to restore the shape by temperature changes.

As shown in FIG. 1, the steam hole of the conventional electric rice cooker is attached to the upper part of the contact plate to discharge steam generated from the cooker body during cooking or warming to the outside of the lid, Regardless of the rice temperature, steam is always discharged to the outside, and when stored for a long period of time, dryness occurs due to excessive discharge of steam, and a phenomenon of heat retention such as discoloration of rice occurs.

Looking at the cause of the above-mentioned heat retention, when cooking, it is necessary to discharge steam from the steam hole to some extent, but when keeping warm, the inside of the rice bowl should be blocked from the outside in order to prevent the generation and discharge of steam of rice containing appropriate moisture. However, the conventional steam hole is always open regardless of the temperature and water content of the internal rice during cooking and warming, the internal temperature is higher than the outside even when warming, thereby changing the water inside the rice into water vapor. Was discharged to the outside through the steam hole, the drying and rice yellow discoloration occurred.

Recently, a thin and light metal plate moving by steam pressure is inserted into the steam outlet as a means for solving the above-mentioned end of the rice cooker, and when the pressure of the steam is high, the metal plate is floated by the steam pressure to open the steam hole. In the case of keeping the vapor pressure low and keeping the vapor pressure low, the device was allowed to sink by the self-load of the metal plate to close the steam hole to prevent water evaporation and discoloration. In the opening / closing mechanism of the steam hole, the temperature inside the rice bowl is driven only by the steam pressure during cooking and warming, without considering the temperature. ; Increasing the temperature at PV = NRT increases the pressure and volume of the gas in proportion.

In this way, the expansion of the internal air volume causes the metal plate to be lifted, and eventually water vapor is released to the outside. Since such a phenomenon occurs little by little over a long period of time, it is usually possible to store it within 24 hours, but there is a problem with the long-term storage thereafter. Modern people living with a large amount of rice have been unable to eat like this, and there has been a waste of food to be thrown away and a time to cook again.

The present invention has been devised to solve the problems of the conventional rice cooker as described above, to provide a rice cooker that can keep the rice warm for a long time, the principle of the shape memory alloy, that is, the shape memory alloy is elastically deformed when subjected to heat It has the property of returning from the form to the original form, and has the property of returning the shape memory alloy to an arbitrary form below the temperature at which martensite is formed, and below the temperature at which the shape memory alloy is martensified. After making it into any shape and heating it to the temperature above the austenitization temperature, the piston where the steam outlet is formed by using the spring made by the shape memory before returning to the original shape, that is, the shape is returned to the original shape. When the internal temperature is high, that is, when cooking, the shape memory alloy spring is tensioned When the temperature is low, that is, when the temperature is low, the normal spring that can lower the piston is installed outside the piston to drive the steam hole by the temperature inside the cooker It is an object of the present invention to provide a vapor hole structure.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Steam hole according to the present invention is composed of a steam hole body 40, the compression spring 50 and the piston 60, the shape memory alloy spring 70 and the support means 80, the steam hole body 40 The fastening portion 42 is formed of a plurality of fasteners 21 and the seating groove 43 is formed in a circular shape therein and the through hole 47 and the through hole 47 of the inside The cylinder portion 46 having the guide groove 45 formed on the side surface and the locking portion 48 having the locking projections 49 and 49 'formed inside and outside form a concentric circle from the bottom to the top. The upper surface of the fastening portion 42 of the lower portion of the steam hole body 40 and the side of the seating portion 44, the steam inlet 22 is formed in the lattice symmetry mutually symmetric with the steam inlet 22 The piston 60 has four upper guides 64 on the upper surface perpendicular to the bottom plate 62 in which four guides 64 protrude outward in a cross shape. It is formed by integrally forming the piston body 61 of a round pipe type formed side and the side outlet port 66 on both sides of the center.

In addition, the inside of the piston body 61 was formed with a tapered spring pin 69 extending further downward from the bottom of the bottom plate from the center of the upper surface formed with the upper discharge port 68.

In addition, the support means 80 is integrally formed with a closed piston pin 85 having a seating groove 88 and a locking piece 86 formed therein, perpendicular to the center of the round bottom plate 82. Two fastening pieces 84 were formed symmetrically on the outside of the bottom plate 82.

Figure 3a is an exploded perspective view of the steam hole 20 according to the present invention, the tightening order is as follows.

When raising the shape memory alloy spring 70 in the seating groove 88 of the upper portion of the guide 80, the lower end of the shape memory alloy spring 70 is caught by the engaging piece 86, the shape memory alloy spring 70 is seated When the piston 60 is raised from the upper portion to the lower portion of the guide 80, the spring pin 69 of the piston 60 penetrates into the shape memory alloy spring 70, and a seating groove of the guide 80 is formed. 88).

Then, when the compression spring 50 is inserted outside the piston body 61, the lower end of the compression spring 50 is seated on the upper surface of the bottom plate 62 of the piston 60, the steam hole body 40 is When pressing the lower portion of the steam hole body 40, the upper end of the compression spring 50 is caught while being caught by the inner catching jaw 49 of the upper portion of the steam hole body 40, the piston body 61 is the steam hole body 40 Protrudes upward through the through-hole 47 of the), in which the guide 80 is pushed to the upper part and inserted into the seating groove 43 of the steam hole body 40, and then the guide 80 is rotated slightly. The fastening is completed by inserting the fastening piece 84 formed on the bottom plate 82 outside of the 80 into the fastening groove 23 of the steam hole body 40.

Figure 3b shows the steam hole 20 of the present invention is completed.

The steam hole of the present invention, which is fastened as described above, is riveted through the fastener 21 formed in the fastening portion 42 of the steam hole body 40 in the center of the contact plate 16 of the rice cooker 10. To attach.

Hereinafter will be described the effect of the steam hole according to the present invention.

4a shows the vapor hole 20 according to the present invention is attached to the upper center of the contact plate 16, and the outer locking jaw 48 on the upper part of the steam hole 20 is formed in the center of the lid 14 (90) It is shown that the fastening, the state at this time shows the flow of the water vapor in a state of warming compression spring 50 is to hold the piston 60, so that the piston 50 does not protrude and the contact plate 16 Water vapor from the through-hole 17 formed in the discharge to enter the steam inlet 22 and a small amount is discharged to the upper outlet (68) through the inside of the piston (60).

4b shows the state change of the steam hole at the time of cooking, and the shape memory alloy spring 70 inside the contracted piston 60 is shaped by the high temperature inside the rice cooker and is tensioned to open the piston 60. It keeps being pushed upwards.

At this time, the water vapor is largely discharged to the side outlet 66 and the upper outlet 68 of the piston body (15).

When the cooking process is completed and the state of heat retention, the temperature inside the cooker is lowered and the shape memory alloy is not maintained in the tensioned state, and the state is the same as that of the 4a by the force of the compression spring 50, that is, the piston is steam Recessed to the hole body 40 to suppress the evaporation of water vapor.

As described above, the electric heat cooker attached to the steam hole 20 according to the present invention is capable of keeping rice warm for a long time by appropriately suppressing evaporation of water, thereby improving warmth and maintaining an unchanged taste for a long time. It also has the effect of improving consumer confidence in rice cookers.

Claims (5)

In the steam hole 20 of the rice cooker, the steam hole 20 is the steam hole body 40, the compression spring 50, the piston 60, the shape memory alloy spring 70 and the support means 80 Steam holes using the shape memory alloy, characterized in that consisting of. The method of claim 1, wherein the steam hole body 40 has a fastening portion (42) having a plurality of fasteners 21 and a seating portion (44) having a circularly formed seating groove (43) therein and inside The cylinder portion 46 having the guide groove 45 formed on the side surface of the through hole 47 and the through hole 47 and the engaging portion 48 having the locking jaws 49 and 49 'formed inside and outside thereof. ) Is formed integrally to form a concentric circle from the bottom to the upper step, the upper surface of the fastening portion 42 and the seating portion 44 of the lower portion of the steam hole body 40, the fastening groove 23 is extended Steam holes using the shape memory alloy, characterized in that the insertion hole 22 is formed in a lattice symmetric with each other. According to claim 1, the piston (60) is a round pipe with an upper outlet (68) formed on the upper surface of the upper surface perpendicular to the bottom plate 62 protruding from the guide 64, the side outlet 66 is formed on the side A steam hole using a shape memory alloy, characterized in that the piston body 61 is formed integrally. The method of claim 3, wherein the inside of the piston body 61 is formed with a tapered spring pin 69 extending further downward from the bottom of the bottom plate from the center of the upper surface formed with the upper outlet (68). Steam hole using shape memory alloy. The piston pin 85 of claim 1, wherein the support means 80 includes a seating groove 88 and a lower portion formed with a locking piece 86 vertically in a center of the round bottom plate 82. Steam holes using the shape memory alloy, characterized in that formed integrally.