KR20010104160A - Pressure control device of Electric rice cooker - Google Patents

Abstract

The present invention relates to a pressure regulating device of the electric pressure cooker capable of adjusting the pressure in the oven during cooking, the pressure regulating device of the electric pressure cooker according to the present invention includes a steam discharge pipe (40) mounted to the lid (14); In the lid 14, the frame 42 coupled with the steam discharge pipe 40 and one end of the frame 42 are hinged to each other so that the steam discharge path of the steam discharge pipe 40 is rotated through the rotation operation ( A valve mechanism composed of a pressure plate 44 for opening and closing 40a); Mechanical pressure control means for adjusting the opening and closing pressure of the vapor discharge pipe 40 by varying the center of gravity of the pressure plate 44; It comprises an electronic pressure control means for adjusting the opening and closing pressure of the steam discharge pipe 40 by operating the pressure plate 44 of the valve mechanism through the electromagnetic force.

Here, the mechanical pressure control means is composed of a weight (50) which is movably mounted to the pressure plate 44 so that the interval with the rotational shaft of the pressure plate 44 is adjusted, the electronic pressure control means is a valve It consists of an electromagnet 60 spaced apart above the pressing plate 44 of the mechanism, and a control unit for controlling the power applied to the electromagnet 60.

Therefore, according to the pressure regulating device of the electric pressure cooker according to the present invention as described above, it is possible to adjust the pressure in the oven, and as a result, it is possible to cook a variety of rice to suit the user's taste, etc. Becomes In addition, since the safety structure of the rice cooker is simplified because it does not require a separate safety means such as a poise valve, it helps to improve the productivity of the rice cooker.

Description

Pressure control device of electric rice cooker

The present invention relates to an electric pressure cooker, and more particularly, to a pressure control device of the electric pressure cooker to enable the pressure control in the oven during cooking.

Electric pressure cooker is a cooking operation using electricity as a heating source, to maintain the inside of the oven at a high pressure to achieve a cooking process quickly by raising the heating temperature at a normal atmospheric pressure, the oven 10 as shown in FIG. And a main body case 12 in which the oven 10 is seated, a lid 14 for opening and closing the main body case 12, an electric device for heating / warming the oven 10, and an oven for cooking ( 10) is configured to include a pressure regulator for regulating the pressure in the.

As shown in FIG. 2, the electric device is a working coil 16 mounted on the main body case 12 to generate an induction current during cooking, a heater 18 that performs relatively weak heat generation when warming, and the like. Consists of

In addition, according to the function of the pressure regulator, the solenoid valve 20 which lowers the pressure in the oven 10 by automatically opening after a predetermined time after the start of cooking, and the pressure in the oven 10 during cooking are constant. If it exceeds, it consists of a poise valve (30) to be kept open while preventing excessively rising the pressure in the oven (10) by opening.

The solenoid valve 20 is connected to the top plate 141 of the lid 14, as shown in Figure 3, the steam discharge pipe 22 is connected to the outside of the top cover 142, and the steam discharge pipe ( The diaphragm 24 which opens and closes the vapor hole 22a in 22, the plunger 26 coupled with the diaphragm 24, and the solenoid core 28 for the operation of the plunger 26 are comprised.

The poise valve 30 includes a steam discharge pipe 32 installed through the lid 14 and a pressure weight 34 mounted on an upper end of the steam discharge pipe 32 from the outside of the lid 14. The pressure weight 34 has a valve pin 35 for opening and closing the upper end of the steam discharge path 32a of the steam discharge pipe 32 therein, and has a structure in which a discharge hole 34a is discharged at the lower side thereof. consist of.

As described above, the cooking operation of the electric pressure cooker is as follows.

First, the eddy current is induced in the oven 10 by the working coil 16, the soaking process is performed so that the moisture is absorbed in the rice grains by gradually heating the oven 10 due to the eddy current, after a soaking process for a predetermined time By heating the oven to a high temperature, the boiling temperature rises rapidly and the boiling process proceeds.

At this time, the upper end of the oven 10 is in close contact with the bottom of the top plate by a binding device (not shown), to maintain the closed state of the solenoid valve 20 and the poise valve 30 constituting the pressure regulator Therefore, when the boiling process is started and the rice starts to cut off, the pressure inside the oven 10 becomes higher than atmospheric pressure due to steam generation. As the pressure inside the oven increases, the temperature of the rice also rises to a temperature higher than the boiling point (at about 100 ° C) at normal pressure, so the rice will ripen quickly.

After the boiling process for a certain time is completed, the heating process by the working coil 16 is stopped in the state of the moxibustion process for a predetermined time, after the end of the moxibustion process by the operation of the solenoid valve 20 In the state in which the steam in the oven 10 is discharged to the outside and the pressure is lowered, the heating process is performed in which the oven 10 is weakly heated to a constant temperature by the heater 18.

Here, the operation of the solenoid valve 20 is applied to the solenoid core 28 under the control of a controller (not shown), the plunger 26 is a diaphragm (26) by the magnetic force generated in the solenoid core 28 The elastically deformed 24 to open the steam hole (22a), the steam in the oven 10 through the steam flow path of the open steam hole (22a) and the vapor discharge pipe 22 communicated with the way Is done.

In addition, in such an electric pressure cooker, if the pressure in the oven 10 during cooking is higher than the reference value, by operating the poise valve 30 as described above, the steam in the oven 10 is discharged to the outside of the appropriate amount is excessive pressure The rise is prevented, the operation of the poise valve 30 will be described in detail as follows.

First, before the pressure in the oven 10 reaches the reference value, the steam exhaust passage 32a of the steam discharge pipe 32 is kept closed by the valve pin 35, which causes the valve pin 35 to be closed. This is because the steam discharge path 34a is blocked by being pressed downward by the weight of the pressure weight 34. Then, when the pressure in the oven 10 exceeds the reference value, that is, the weight of the pressure weight 34, the valve pin 35 is lifted up and the pressure weight 34 is tilted to one side (the virtual line in FIG. 2). By swinging), the steam discharge path 32a is opened and the steam in the oven 10 is discharged through the discharge hole 34a of the pressure weight 34 so that the pressure in the oven 10 is lowered to a reference value or less. When the pressure in the oven 10 is lowered, the pressure weight 34 is in equilibrium again in its structure so that the valve pin 35 blocks the steam discharge path 32a to prevent excessive pressure drop, and this operation is repeated to cook. The pressure inside the oven 10 is maintained at a constant level.

That is, in the conventional electric pressure cooker as described above is to achieve an effective cooking through the pressure control and safe operation of the pressure regulator.

However, according to the pressure regulator of the conventional electric pressure cooker as described above, the poise valve 30 maintains the pressure in the oven 10 at a constant level through the operation of the pressure weight 34 when cooking, so-called by a constant pressure. Since only a single pressure cooking is performed, a problem arises in that the food cannot be cooked in various states to suit the user's taste by adjusting the pressure in the oven 10.

In addition, since the solenoid valve 20 which is complicated in structure and requires many parts has to be provided separately from the poise valve 30, there arises a problem that the production cost of the rice cooker is increased.

The present invention has been made to solve the above-mentioned conventional problems, a simple structure that combines the mechanical method using the pressure and the method using an electromagnet, the pressure control in the oven at the same time to prevent excessively high pressure in the oven during cooking It relates to a pressure regulator of the electric pressure cooker to make this possible.

1 is a perspective view showing the structure of a general electric pressure cooker.

2 is a cross-sectional view showing the structure of a general electric pressure cooker.

Figure 3 is a cross-sectional view showing the structure and operating state of the solenoid valve applied to the pressure regulating device of the electric pressure cooker according to the prior art.

Figure 4 is a cross-sectional view showing the poise valve structure and the operating state applied to the pressure regulating device of the electric pressure cooker according to the prior art.

5 is a schematic perspective view showing the structure of a pressure regulating device according to an embodiment of the present invention.

Figure 6 a, b is a schematic diagram showing the operating state of the pressure regulating device according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: oven 14: lid

20: solenoid valve 30: poise valve

40: steam exhaust pipe 40a: steam exhaust furnace

42: frame 44: pressure plate

441: nozzle cap 50: weight

44a: guide slot 60: electromagnet

62: bobbin 64: magnetic coil

Pressure regulating device of the electric pressure cooker provided to achieve the above object is a steam discharge pipe mounted to the lid, the frame coupled to the steam discharge pipe in the lid, and one end hinged to the front end of the frame to rotate the operation A valve mechanism consisting of a pressurizing plate for opening and closing the steam discharge path of the steam discharge pipe through the mechanical pressure control means for controlling the opening and closing pressure of the steam discharge pipe by changing the center of gravity of the pressure plate, and the valve through the electromagnetic force And an electronic pressure control means for regulating the opening and closing pressure of the steam discharge pipe by operating the pressure plate of the mechanism.

Here, the mechanical pressure control means is made of a weight that is movably mounted to the pressure plate so that the interval with the rotational shaft of the pressure plate is adjusted, the electronic pressure control means is spaced above the pressure plate of the valve mechanism It consists of an electromagnet and a control unit for adjusting the power applied to the electromagnet.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 5 to 6, and like reference numerals denote like parts.

First, the pressure regulator of the electric pressure cooker according to the embodiment of the present invention is mounted through the top plate 141 inside the lid 14 as shown in Figure 5 and the steam discharge path 40a is formed steam discharge A pipe 40 and a frame 42 and a pressure plate 44 which is connected to one end of the frame 42 by hinges to open and close the steam discharge passage 40a of the steam discharge pipe 40 through a rotational operation. By actuating the pressure plate 44 of the valve mechanism, the mechanical pressure control means for adjusting the opening and closing pressure of the steam discharge pipe 40 by varying the center of gravity of the valve mechanism, the pressure plate 44 and the electromagnetic force It comprises an electronic pressure control means for adjusting the opening and closing pressure of the steam discharge pipe (40).

Here, the pressure plate 44 has a conical nozzle cap 441 (see FIG. 6) at the bottom thereof so that the closing action of the vapor discharge passage 40a is more efficient. It is made of light weight that does not have a great influence on.

In addition, the mechanical pressure control means is composed of a weight (50) which is movably mounted to the pressure plate 44 so that the interval with the rotational shaft of the pressure plate 44 is adjusted, the weight (50) Is deviated from the pressure plate 44 by the guide slot 44a provided in the pressure plate 44, which is biased toward one side of the nozzle cap 441, and is mounted to be able to reciprocate within a predetermined section.

The electromagnetic pressure control means is composed of an electromagnet 60 located above the pressure plate 44 of the valve mechanism, and a controller (not shown) for adjusting a power applied to the electromagnet 60, wherein the electromagnet 60 is It consists of a bobbin 62 and a magnetic coil 64 surrounding the bobbin 62, and is mounted in a structure supported by a support 64 attached to the lid.

According to the pressure regulating device according to the embodiment of the present invention configured as described above, on one side of the mounting structure of the pressure plate 44 hinged to the frame 42, the pressure plate 44 through the steam discharge pipe 40 While the working point of the steam pressure applied to the pressure plate 44 is formed at a predetermined distance away from the rotational shaft of the pressure plate 44 to form a rotation moment, the pressure applied to the pressure plate 44 due to the weight of the weight 50 A resistance moment is formed which is counteracting the rotational moment due to the vapor pressure.

Therefore, the rotational moment due to the steam pressure is determined by the magnitude of the steam pressure formed in the oven 10 during cooking, and the resistance moment due to the weight 50 varies depending on the position of the weight 50. The opening and closing pressure of the steam discharge pipe 40 can be adjusted by adjusting the position of 50. Hereinafter, the pressure control through the mechanical pressure control means will be described in detail.

First, as shown in a of FIG. 6A, when the weight 50 is located close to the rotation axis of the pressure plate 44, the distance between the weight 50 and the rotation center point (rotation axis) is short, so the magnitude of the resistance moment is increased. Is formed small. Therefore, even if the pressure inside the oven 10 is formed slightly higher than the atmospheric pressure, the pressure plate 44 is lifted by the steam pressure through the steam discharge pipe 40 and the steam is discharged, so that the pressure inside the oven 10 is almost equal to the atmospheric pressure. Remain similar (shown as phantom lines in the drawing)

When the weight 50 is gradually moved away from the rotating shaft by adjusting the position of the weight 50 (solid line shown in the drawing), the resistance moment also increases accordingly, so that the pressure in the oven 10 can be appropriately adjusted at or above atmospheric pressure. Pressure cooking is possible in which the temperature in the oven 10 is formed higher than the boiling point at atmospheric pressure.

When the pressure inside the oven 10 continues to rise during pressure cooking, when the rotational moment due to the steam pressure exceeds the resistance moment due to the weight 50, the pressure plate 44 naturally lifts upwards and the steam discharge pipe 40. The vapor discharge passage 40a is opened. Therefore, by adjusting the position of the weight 50, various cooking at the user's desired temperature is possible, and the pressure in the oven 10 is prevented from rising higher than the set pressure, which simultaneously controls the pressure regulating function and the safety valve function. It can be seen that it is performed.

After the cooking is completed, the steam discharge pipe 40 is forcibly opened by the operation of the electronic pressure control means, and the pressure in the oven 10 is reduced to atmospheric pressure, which is generated by supplying power to the electromagnet 60 by the controller. By virtue of the electromagnetic force, the pressing plate 44 can be lifted by lifting the weight of the weight 50 as shown in FIG. 6B.

On the other hand, according to the embodiment of the present invention, when the steam discharge pipe 40 is opened, since the steam passing through the steam discharge path 40a hits the bottom surface of the pressure plate 44 and is evenly discharged, the conventional poise valve 30 (See FIG. 4), problems such as high noise leakage caused by steam concentrated at the lower end of the pressure weight 34 or contact noise generated while the pressure weight 34 is shaken are prevented.

As described above, according to the pressure regulating device of the electric pressure cooker according to each embodiment of the present invention, not only can cook rice in various states according to the user's taste by controlling the pressure in the oven (10), safety It can be seen that the role of the valve is also performed.

Finally, the pressure regulator according to the present embodiment is not only a pressure cooker, it turns out that it is applicable to various cooking utensils (for example, a universal cooker) that requires pressure control when cooking.

According to the pressure regulating device of the electric pressure cooker according to the present invention, since it is possible to control the pressure in the oven, as a result, it is possible to cook a variety of rice to suit the user's taste, such as noise is reduced during steam discharge, commerciality of the cooker It helps to improve. In addition, since the safety structure of the rice cooker is simplified because it does not require a separate safety means such as a poise valve, it helps to improve the productivity of the rice cooker.

Claims (3)

A vapor discharge pipe mounted to the lid; A valve mechanism comprising a frame coupled to the steam discharge pipe in the lid, and a pressurizing plate configured to open and close a steam discharge path of the steam discharge pipe through a rotational operation by having one end hinged to the front end of the frame; Mechanical pressure control means for controlling the opening and closing pressure of the steam discharge pipe by varying the center of gravity of the pressure plate; Electronic pressure control means for controlling the opening and closing pressure of the steam discharge pipe by operating the pressure plate of the valve mechanism through the electromagnetic force Pressure regulating device of the electric pressure cooker comprising a. The method of claim 1, wherein the mechanical pressure control means Pressure regulator of the electric pressure cooker, characterized in that consisting of a weight that is movably mounted to the pressure plate so that the interval with the rotation shaft of the pressure plate is adjusted. The method of claim 1, wherein the electronic pressure control means Pressure regulator of the electric pressure cooker, characterized in that consisting of a control unit for controlling the power applied to the electromagnet and the electromagnet positioned above the pressure plate of the valve mechanism.