KR102226478B1 - electric cooker - Google Patents

Abstract

In order to improve cooking quality and ease of use by being provided to be cooked in a pressure state and a non-pressure state inside the inner pot, the present invention includes a main body in which an inner pot provided with a flange portion at the top is accommodated; A lid coupled to an upper portion of the main body and opened and closed by means for opening and closing; A locking ring selectively engaged with the flange portion in connection with the opening and closing means; And a pressure switching means arranged to pass through the lid and interlocking with the opening/closing means to switch and maintain an open/closed state for discharging steam inside the inner pot, and the outer periphery of the pressure converting means on the upper surface of the locking ring It provides an electric cooker, characterized in that it is provided with a lift protrusion inclined upwardly toward the locking rotational direction along a portion facing the elevating wing portion protruding in the.

Description

Electric cooker

The present invention relates to an electric cooker, and more particularly, to an electric cooker which is provided so as to be able to cook in a pressure state and a non-pressure state inside the inner pot to improve cooking quality and convenience in use.

In general, an electric cooker means an electric rice cooker, an electric pressure rice cooker, etc. used to cook food in businesses and homes, and includes a main body provided with a heating unit and a lid covering the upper part of the main body.

In addition, the main body has an inner pot in which food is accommodated, and the lid is hingedly connected to one side of the main body to be opened and closed, and an inner pot cover is provided at a lower portion to seal the upper opening of the inner pot.

At this time, a flow hole communicating with the inside of the inner pot is formed on one side of the inner pot cover, and steam inside the inner pot may flow through the flow hole to a pressure control means provided in the lid.

In detail, the pressure control means may be provided with a solenoid valve electrically driven to open and close the steam discharge passage connecting the inside of the inner pot and the outside of the cooker, a pressure weight valve for maintaining the inner pot internal pressure at a constant level, and the like.

That is, when cooking starts, the steam discharge passage is closed through the solenoid valve to increase the pressure inside the inner pot, but the pressure inside the inner pot may be maintained at a constant level through the pressure weight valve.

However, conventional electric cookers maintain the inner pot at one set pressure through the interaction between the weight pressure of the pressure weight and the steam pressure, so cooking quality is degraded because a cooking method suitable for the user's taste or type of food cannot be applied/selected. There was a problem.

In other words, in the case of cooking ingredients that do not require pressure, the texture is softened due to high pressure, and if you do not like pressure rice with a sticky and chewy texture, and you like non-pressurized rice with a soft texture, there is a separate non-pressure There is a problem in that an electric rice cooker is purchased and used, or separate cooking using a general pot is required.

Accordingly, during the cooking process, the solenoid valve is opened more at a certain time/period than the pressure rice and provides a soft texture by reducing the heating power or lengthening the soaking time, but it did not reach the taste of rice cooked with a non-pressure electric rice cooker.

In addition, if there is pressure inside the inner pot during cooking, the pressure safety device that blocks the opening of the lid in the high-pressure state of the inner pot makes it impossible to open and close the lid to check the cooking state or to add additional ingredients. There was a problem that caused it.

Korean Patent Registration No. 10-0272856

In order to solve the above problems, the present invention has as a solution to provide an electric cooker which is provided so as to be able to cook in a pressure state and a non-pressure state inside the inner pot to improve cooking quality and convenience in use.

In order to solve the above problems, the present invention is a main body in which the inner pot is accommodated having a flange portion on the top; A lid coupled to an upper portion of the main body and opened and closed by means for opening and closing; A locking ring selectively engaged with the flange portion in connection with the opening and closing means; And a pressure switching means arranged to pass through the lid and interlocking with the opening/closing means to switch and maintain an open/closed state for discharging steam inside the inner pot, and the outer periphery of the pressure converting means on the upper surface of the locking ring A lift protrusion which is inclined upwardly in the locking rotational direction along a portion opposite to the lifting wing protruding in is provided, and the pressure converting means is disposed so as to penetrate the lower surface of the lid, and the pressure converting inside the inner pot communicates with the inside of the inner pot. A lower cylinder having a flow path, a lifting piston protruding on an outer circumference of the lifting blade so as to be elevated along an inclined surface of the lift protrusion to switch the opening and closing state of the pressure switching passage, and the lower portion to maintain the opening and closing state of the pressure switching passage. And a pressurizing means coupled to the upper part of the cylinder to pressurize the lifting blade, wherein the pressurizing means has a weight corresponding to the abnormal pressure so that the pressure conversion passage is forcibly opened above a preset abnormal pressure, and is attached to the outer circumference of the lifting piston. It provides an electric cooker, characterized in that provided with a pressure load weight provided.

Through the above solution, the present invention provides the following effects.

First, according to the opening and closing of the pressure switching means, a non-pressure cooking mode for cooking that does not require pressure and a pressure cooking mode for cooking requiring high pressure can be easily switched, so that various cooking methods can be freely used with one device. In addition, since it is possible to cook according to the taste of the user, such as the chewy texture of pressure rice and the soft texture of non-pressure rice, the compatibility of the product and the cooking quality can be improved.

Moreover, in the non-pressure cooking mode, since the lid can be opened and closed freely without limitation due to the pressure safety device, additional ingredients can be added during cooking or cooking conditions can be easily checked, so that the usability of the product can be improved.

Second, when the control unit locks and unlocks the locking ring, the non-pressure cooking mode and the pressure cooking mode are switched according to the rotation of the handle unit by determining the opening and closing of the pressure switching means through a detection signal of the sensor unit according to the position of the marker. Since the suitable cooking temperature control algorithm can be automatically selected, the usability and cooking quality of the product can be remarkably improved.

Third, since the opening and closing state of the pressure switching means is switched in conjunction with the rotation of the handle portion, the non-pressure cooking mode and the pressure cooking mode can be easily selected and used by simply rotating the handle portion, so that the usability of the product can be remarkably improved.

Fourth, since the link means for interlocking the handle part and the pressure switching means is provided with a simple protrusion structure protruding on the locking ring, the productivity and assembly properties of the product can be improved through a reduction in the number of parts and simplification of the connection structure between parts. I can.

Fifth, since the pressurizing means for maintaining the lowered state of the lifting piston is provided to have an elastic force or load corresponding to a preset abnormal pressure, the pressure conversion passage can be reliably closed during pressure cooking, but the inner pot according to the abnormality of the pressure-responsive operation means When the internal pressure is increased, the pressure conversion channel can be forcibly opened, which can improve the safety of the product.

Sixth, the conversion discharge hole of the lifting piston is covered by a scattering prevention plate or an emergency prevention step to prevent the moisture condensed on the inside of the pressure conversion channel from being scattered and discharged together with steam, so that it is viscous along with the prevention of safety accidents caused by the scattered moisture. Contamination of the lid and steam cap due to rice water is minimized, making it possible to use more safely and cleanly.

1 is an exploded perspective view showing a lid portion of an electric cooker according to a first embodiment of the present invention.
2A and 2B are perspective views showing the open and closed states of the pressure switching means in the electric cooker according to the first embodiment of the present invention.
3A and 3B are cross-sectional views showing the open and closed states of the pressure switching means in the electric cooker according to the first embodiment of the present invention.
Figure 4 is an exemplary view showing a modified example of the pressing means in the electric cooker according to the first embodiment of the present invention.
5 is an exemplary view showing a modified example of the coupling structure of the lower cylinder in the electric cooker according to the first embodiment of the present invention.
6 is a block diagram showing an electric cooker according to a first embodiment of the present invention.
7 is a cross-sectional view showing the lid of the electric cooker according to the second embodiment of the present invention.

Hereinafter, an electric cooker according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing the lid of the electric cooker according to the first embodiment of the present invention, and Figs. 2A and 2B show the open and closed states of the pressure switching means in the electric cooker according to the first embodiment of the present invention. 3A and 3B are cross-sectional views showing the open and closed states of the pressure switching means in the electric cooker according to the first embodiment of the present invention, and Fig. 4 is a pressurized electric cooker according to the first embodiment of the present invention. Fig. 5 is an exemplary view showing a modified example of the coupling structure of the lower cylinder in the electric cooker according to the first embodiment of the present invention, and Fig. 6 is a first embodiment of the present invention. It is a block diagram showing the electric cooker according to.

1 to 6, the electric cooker 100 according to the present invention includes a main body (not shown), a lid 10, a locking ring 20, a pressure switching means 50, a pressure response operation means 90 ), sensor units 18a and 18b, and a control unit 19a.

Here, a mounting space provided with a heating means 19c such as a hot plate heater or an induction heating device is formed inside the main body (not shown), and an inner pot (not shown) in which food is accommodated is mounted in the mounting space. At this time, a plurality of flange portions are formed to protrude radially outward from an upper end of the inner pot (not shown).

Meanwhile, referring to FIGS. 1 to 2A, the lid 10 is coupled to an upper portion of the main body (not shown) to be opened and closed, and an inner lid portion 10b on which various electrical components and wiring are installed, and the inner lid portion It covers (10b) but is provided including an outer lid portion (10a) provided with a handle portion (11) on one side of the upper surface portion.

Hereinafter, it is preferable that one side is understood as a direction toward the open end 17 of the lid 10, and the other side is understood as a direction toward the hinge connection 16 of the lid 10.

In addition, the locking ring 20 is rotatably coupled to the lower surface of the inner lid portion 10b and is selectively locked to the flange portion according to a rotation angle.

In detail, a plurality of locking protrusions 21 are protruded radially inward so as to correspond to the respective flange portions on the inner circumference of the locking ring 20. At this time, when the locking ring 20 is rotated at an unlocking angle, the locking protrusions 21 are disposed in the space between the flange portions, and the lid 10 and the inner pot (not shown) may be separated and opened and closed.

And, when the locking ring 20 is rotated at a locking angle while the lid 10 is closed, the locking protrusions 21 are constrained to the lower end of the flange to lock the lid 10 and the inner pot (not shown). Can be.

In addition, it is preferable that markers 22a, 22b such as permanent magnets are provided on the upper surface of the locking ring 20 to mark the direction of rotation, and the markers 22a, 22b are provided on the inner lid portion 10b. It is preferable that the sensor units 18a and 18b for sensing each are provided.

Here, the sensor units 18a and 18b may be provided as magnetic force sensing sensors, etc. to detect the magnetic force of adjacent markers 22a and 22b when the locking ring 20 rotates and transmit a detection signal, and the control unit ( 19a) determines the locking and unlocking states of the locking ring 20 by receiving the detection signals from the sensor units 18a and 18b.

At this time, the markers (22a, 22b) may be provided in one or two, and the sensor unit (18a, 18b) is preferably provided in a pair to detect the locking and unlocking states of the locking ring (20), respectively. Do.

For example, when the number of markers is one, the sensor units 18a and 18b may be disposed corresponding to the position of the marker when the locking ring 20 is locked and the position of the marker when the locking ring 20 is unlocked. I can. At this time, the marker may be detected by alternating each sensor unit 18a and 18b when the locking ring 20 is locked and unlocked.

And, when the marker is provided in two, the sensor unit (18a, 18b) is the position of the first marker (22a) when the locking ring 20 is locked and the second marker ( 22b) can be placed at each location. In this case, each of the markers may be selectively sensed by each sensor unit 18a, 18b at a corresponding position when the locking ring 20 is locked and unlocked.

Meanwhile, referring to FIGS. 1 to 3A, a handle base part 30 is connected to a lower end of the handle part 11. In detail, the handle base portion 30 includes a support portion 30c, and a locking ring interlocking portion 30a and a safety bar interlocking portion 30b protruding at one end and the other end of the support portion 30c. At this time, the support portion (30c) is a key coupled to the lower end of the handle portion (11) on the upper surface, the support protrusion (14) of the inner lid portion (10b) is inserted into the rotation support groove (34) formed on the lower surface portion It is supported by rotation. Accordingly, the handle base part 30 can be rotated integrally with the handle part 11 without twisting.

In addition, the locking ring interlocking portion 30a is formed to extend so as to overlap with the rotational trajectory of the locking ring 20, and a connection hole 31 is formed through the locking ring 20 at one side disposed to overlap with each other. At this time, in the connection hole 31, a connection protrusion 23 protruding on the upper surface of the locking ring 20 is inserted and coupled through the arc-shaped long hole 15 of the inner lid portion 10b, through which The locking ring 20 may be rotated interlocking with the handle part 11.

In addition, the safety bar interlocking portion (30b) is a safety bar (35) which is linearly moved to one side and the other side when the handle base portion (30) is rotated, but is selectively limited linear movement by the pressure safety device (90c). Connected.

In detail, when the internal pressure of the inner pot is increased above the set safety pressure, the safety pin of the pressure safety device 90c is raised so that the safety bar 35 is restrained, and the linear movement of the safety bar 35 is restricted. Accordingly, rotation of the handle base portion 30 connected to the safety bar 35 is restricted, and unlocking of the locking ring 20 when the inner pot is high pressure can be prevented.

Meanwhile, a lead plate 80 is coupled to a lower surface of the inner lid portion 10b, and an inner pot cover (not shown) may be additionally mounted on the lower surface of the lead plate 80.

In this embodiment, the sealing packing 82 for sealing the upper opening of the inner pot (not shown) is shown as an example that is provided on the lower surface of the lead plate 80, but the sealing packing 82 is the inner pot cover (not shown). It is also possible to be provided on the border of the city).

At this time, a plurality of steam flow holes are formed through the other side of the inner pot cover (not shown) so that the steam inside the inner pot is discharged, and a plurality of communication holes ( 81a, 81b, 81c) are formed through.

In addition, between the lead plate 80 and the inner lid portion 10b, the communication holes 81a, 81b, 81c are integrally covered, but the mounting corresponding to the communication holes 81a, 81b, 81c A control plate 70 through which holes 71a, 71b, and 71c are formed is provided. Of course, the control plate 70 and the lead plate 80 may be provided integrally.

Meanwhile, a plurality of upper through portions 13a, 13b, 13c are formed on the other side of the outer lid portion 10a so as to correspond to the respective mounting holes 71a, 71b, 71c, and the inner lid portion 10b has the A lower through portion 13d having a size covering the formation region of each of the upper through portions 13a, 13b, and 13c is formed.

At this time, the pressure switching means 50 is disposed to penetrate the lid 10 through one (13a) of the upper through portion (13a, 13b, 13c) and the lower through portion (13d), inside the inner pot It is provided to maintain a selective opening and closing state for steam discharge. That is, the pressure switching means 50 is provided so that one of the open and closed states is continuously maintained during the cooking process.

In detail, the pressure switching means 50 includes a communication member for communicating the inside of the inner pot with the outside, and an opening/closing member for maintaining one of the open and closed states of the communication member by pressure in the first direction.

Hereinafter, a case in which the first direction is from the top to the bottom is described as an example, and the first direction is from the bottom to the top, from the left to the right, and from the right to the left according to the positions of the link means and the opening and closing member to be described later. It can be changed in various ways, such as the direction to the direction. In this case, the opening/closing member may be provided to keep the communication member open by pressure in the first direction, or may be provided to keep the communication member closed.

In addition, the opening/closing member may be switched in an opening/closing state by a link means for forming a pressure in a second direction opposite to the first direction when the handle part 11 is rotated. Here, when the pressure in the first direction keeps the opening and closing member open, the pressure in the second direction switches the opening and closing member to the closed state, and when the pressure in the first direction is kept so that the opening and closing member is closed, the pressure in the second direction The pressure switches the opening/closing member to an open state. Accordingly, the open/close state of the pressure switching means 50 may be switched in conjunction with the rotation of the handle part 11.

Hereinafter, the case where the link means is the lift protrusion 24 of the locking ring 20 interlocked with the handle 11 is described as an example, and the link means is provided integrally with the handle 11 or the handle It is also possible to be provided in the handle base portion 30 interlocked with the portion (11).

In addition, in this embodiment, the communication member is provided with a lower cylinder 53 and an upper cylinder 51 to form an inner flow path that communicates the inside and the outside of the inner pot, and the opening and closing member comprises a lower cylinder 53 and an upper cylinder. It will be described as an example that it is provided with a lifting piston 52 that is raised and lowered between 51 and switches the open/closed state of the inner flow path.

At this time, the lifting piston 52 is pressed downward by a pressing means to maintain the closed state of the inner flow path, but the link means has a protrusion integrally provided with the locking ring 20, and the lifting piston ( 52) can be pressed upward.

In addition, the pressure-responsive operation means 90 is disposed to penetrate the lid 10 through the remaining upper through portions 13b and 13c and the lower through portions 13d in which the pressure conversion means 50 is not disposed. .

Here, the pressure-responsive operation means 90 includes a solenoid valve 90b that opens and closes according to an electric signal, and a pressure weight valve 90a provided with an additional weight that is raised and lowered according to the steam pressure inside the inner pot, and the pressure conversion In the pressure cooking mode in which the means 30 is closed, it is selectively opened and closed according to the pressure level inside the inner pot.

That is, when the handle part 11 is rotated so that the locking ring 20 is unlocked, the pressure converting means 50 is opened and cooking is performed in a non-pressure cooking mode in which steam inside the inner pot is continuously discharged during cooking. Done. At this time, the inner flow path of the pressure switching means 50 is preferably provided with a cross-sectional area of a size that does not generate pressure in the inner pot by discharging all the steam generated during cooking.

And, when the handle part 11 is rotated so that the locking ring 20 is locked, the pressure switching means 50 is closed so that the pressure inside the inner pot is maintained at a constant level by the pressure response operating means 90. Cooking can be done in a pressure cooking mode.

Meanwhile, referring to FIGS. 1 to 6, the control unit 19a controls the power supply to the main body (not shown) to be activated when at least one of the sensor units 18a and 18b is received.

In detail, one of the sensor units (18a) is disposed corresponding to the position of the first marker (22a) in the locking rotation direction when the locking ring (20) is locked, and the other (18b) is the locking ring (20). When the lock is unlocked, it is disposed corresponding to the position of the second marker 22b on the unlocking rotation direction side.

At this time, when the locking ring 20 is locked and rotated, the pressure switching means 50 is closed, and the first sensor unit 18a senses the magnetic force of the first marker 22a and transmits a detection signal. In addition, when the locking ring 20 is unlocked and rotated, the pressure switching means 50 is opened, and the second sensor unit 18b senses the magnetic force of the second marker 22b and transmits a detection signal.

Here, when one of the detection signals of the first sensor unit 18a and the second sensor unit 18b is received, the control unit 19a may activate the power supply of the main body. When the power supply is activated, the heating means 19c for heating the inner pot may be driven according to a cooking command input through the operation panel 19b of the main body.

Accordingly, not only in the pressure cooking mode in which the locking ring 20 is locked, but also in the non-pressure cooking mode in which the locking ring 20 is unlocked, the heating means 19c is driven to cook food in the inner pot.

In addition, it is preferable that the control unit 19a controls the power supply to the main body (not shown) to be deactivated when the detection signal is not received. Here, deactivation is preferably understood as meaning that the heating means 19c is not driven even when a cooking command is input. In addition, the word that the detection signal is not received means that the markers 22a and 22b are not detected by both sensor units 18a and 18b. Accordingly, only in a state in which the locking ring 20 is locked and the pressure switching means 50 is completely closed, or the locking ring 20 is unlocked and the pressure switching means 50 is completely opened, the main body ( (Not shown) may be activated.

That is, since food can be prevented from being cooked in a state where the pressure switching means 50 is partially open or closed, a reduction in cooking quality due to partial opening and closing of the pressure switching means 50 can be prevented, such as occurrence of safety accidents. have.

In addition, the controller 19a controls the cooking temperature of the inner pot through a control algorithm of a preset pressure cooking mode when the cooking command is input while a sensing signal corresponding to the locking of the locking ring 20 is received. At this time, the control unit 19a may control the heating amount of the heating means 19c so that a cooking temperature suitable for pressure cooking such as pressure rice is maintained.

In addition, when the cooking command is input while the sensing signal corresponding to the unlocking of the locking ring 20 is received, the control unit 19a uses a preset non-pressure cooking mode control algorithm to determine the heating amount of the heating means. Control. At this time, the control unit 19a may control the heating amount of the heating means 19c so that a cooking temperature suitable for non-pressure cooking such as non-pressure rice is maintained.

Accordingly, when the handle part 11 is rotated, the locking and unlocking of the locking linking 20 is switched, and the open/closed state of the pressure switching means 50 is switched. Since a suitable cooking temperature control algorithm can be automatically selected, the usability and cooking quality of the product can be remarkably improved.

On the other hand, in the upper surface portion of the outer lid portion (10a), a mounting groove (12) is recessed along the rim of the upper through portion (13a, 13b, 13c), the pressure response operating means (90) and the pressure switching means The steam cap portion 60 for guiding the steam discharge of 50 may be attached or detached.

Here, the steam cap part 60 is mounted to surround the outer circumference of the pressure weight valve 90a by forming a pressure weight through hole 63 on one side, and the pressure switching means 50 in the guide space 61 formed therein. And an upper end of the solenoid valve 90b.

At this time, the steam from the pressure weight valve (90a) collides with the inner wall surface of the pressure weight through hole (63) and is decelerated to be discharged to the outside, and the steam from the pressure switching means (50) and the solenoid valve (90b) guides the It collides with the flow rate control rib (not shown) protruding in the space 61 and is decelerated to be discharged to the outside through the vapor guide hole 62 at the other end of the guide space 61. Accordingly, safety accidents such as burns due to rapid discharge of high-temperature/high-pressure steam or steam discharge noise can be minimized.

In addition, it is preferable that the main body (not shown) is provided with an auxiliary locking means for locking the locking protrusion 17a protruding from the open end 17 of the lid 10. Accordingly, the locking ring 20 is unlocked, but the closed state of the lid 20 can be stably maintained even in the non-pressure cooking mode in which the pressure switching means 50 is opened. Through this, opening of the lid 10 due to the steam pressure during cooking or shaking can be prevented, so that a close contact between the inner pot (not shown) and the inner pot cover can be maintained, and the pressure conversion means 50 without leakage of steam from the inner pot And it can be safely discharged through the steam cap portion (60).

On the other hand, referring to FIGS. 1 to 3A, the pressure switching means 50 is preferably provided including a lower cylinder 53, a lifting piston 52, an upper cylinder 51, and a pressing means.

Here, the lower cylinder 53 is provided in a hollow cylindrical shape so that a pressure conversion passage 53a is formed therein, and is disposed so as to penetrate the lower through portion 13d. At this time, as the lower end of the lower cylinder 53 is coupled to be in close contact with the communication hole 81a, the pressure conversion passage 53a and the inner pot may communicate with each other.

In detail, a decut coupling portion 53c is formed at the lower end of the lower cylinder 53, and the communication hole 81a facing the lower cylinder 53 is processed into a decut cross section corresponding to the decut coupling portion 53c. It is preferable to be provided with a de-cut hole. Accordingly, the outer periphery of the de-cut coupling portion 53c is molded and supported on the inner periphery of the de-cut hole, so that rotation of the lower cylinder 53 due to vapor pressure can be prevented.

At this time, the de-cut coupling part 53c is inserted into the de-cut hole while the sealing O-ring 59 is mounted on the outer periphery, and a thread is formed in the inner circumference of the de-cut coupling part 53c inserted into the de-cut hole. The outer circumferential thread of 58 can be fastened.

Further, the cylinder cap 58 has a plurality of steam discharge holes 58b formed therethrough so that the steam inside the inner pot flows, and a fastening step 58a is formed along the outer circumference of the lower edge of the decut hole. Here, each of the vapor discharge holes 58b is preferably arranged to be rotationally symmetrical with respect to the center of the area of the cylinder cap 58 so that the cylinder cap 58 can be easily rotated and fastened using a snap ring plier or the like.

At this time, when the cylinder cap 58 is coupled to the decut coupling portion 53c, the edge of the decut hole is engaged between the fastening step 58a and the lower end of the lower cylinder 53 so that the lower cylinder 53 It may be fixed, and between the lower end of the lower cylinder 53 and the edge of the decut hole may be sealed by the sealing O-ring 59. Accordingly, the steam inside the inner pot can be stably introduced into the pressure conversion passage 53a without leakage. Here, the cylinder cap 58 may be integrally formed in the communication hole 81a of the lead plate 80.

Of course, as shown in FIG. 5, the lower cylinder 153 may be fixed to the mounting hole of the control plate 170. That is, as a thread is formed on the outer circumference of the fixed fastening part 153c provided at the lower end of the lower cylinder 153, and a thread is formed in the inner circumference of the mounting hole 171a, the fixed fastening part 153c is It may be fastened to the mounting hole (171a). At this time, it is preferable that an O-ring fixing jaw 153e supported on the edge of the mounting hole 171a is provided on the outer periphery of the upper end of the fixing fastening part 153c, and a sealing O-ring at the lower portion of the O-ring fixing jaw 153e ( When the fixed fastening part 153c is coupled to the inner circumference of the mounting hole 171a while the 159a) is mounted, the space between the lower cylinder 153 and the mounting hole 171a may be sealed.

In addition, a sealing member 159b is disposed at the lower end of the fixed fastening part 153c, so that the edge between the fixed fastening part 153c and the communication hole 181a is sealed, and the lower cylinder 153 is fixed. I can. Accordingly, the steam inside the inner pot may be stably introduced into the pressure conversion passage without leakage, and the lower cylinder 153 and the pressure response operating means 90 may be collected and fixed in one part.

In addition, the lower cylinder may be fixed by a method such as being fitted and fixed in the mounting hole 171a, and the sealing O-ring and the sealing member are mounted to prevent vapor leakage when the pressure conversion passage and the communication hole communicate with each other. can be changed.

In addition, the lifting piston 52 is coupled to the upper part of the lower cylinder 53 so as to be able to move up and down, and the pressure conversion passage 53a is opened and closed according to the lifting of the lifting piston 52.

Here, the lifting piston 52 has a seating plate portion 52a formed to a size exceeding the pressure conversion passage 53a and seated at the upper end of the lower cylinder 53, and an outer end of the seating plate portion 52a. It includes an upper slide pipe portion (52c) and a lower slide pipe portion (52b) extending in the vertical direction from.

At this time, a shielding protrusion 52f for shielding the pressure conversion passage 53a is protruded on the lower surface of the seating plate 52a, and a plurality of arc-shaped conversion discharges are divided along the outer periphery of the shielding protrusion 52f. The hole 52e is formed through.

That is, when the lifting piston 52 descends, the upper end of the pressure conversion passage 53a is sealed by the shielding protrusion 52f, and when the lifting piston 52 rises, the shielding protrusion 52f is the pressure switching passage ( It is spaced apart from the upper end of 53a) so that the steam inside the inner pot may rise through the conversion discharge hole 52e.

In addition, the upper cylinder 51 is provided in a hollow cylindrical shape and is disposed to pass through the upper through portion 13a. At this time, between the upper cylinder 51 and the upper through portion 13 is sealed by a tubular sealing member 57, the upper outer circumference of the upper cylinder 51 has a ring-shaped sealing groove (51c) recessed formed to form a tubular The sealing protrusion 57a on the inner circumferential side of the sealing member 57 may be caught and supported.

In addition, an arc-shaped column fastening part 51b divided into a plurality is provided at a lower end of the upper cylinder 51, and a thread is formed in the inner circumference of the column fastening part 51b. At this time, as the column fastening part 51b penetrates through the conversion discharge hole 52e and is fastened to a thread on the upper outer circumference 53d side of the lower cylinder 53, the upper cylinder 51 becomes the lower cylinder 53 ) Can be fixed. Here, it is preferable that the column fastening part 51b is provided less than the cross-sectional area of the conversion discharge hole 52e so that a vapor flow area is secured when the lifting piston 52 is raised.

In addition, it is preferable that a scattering prevention plate 51f protrudes from the inner circumference of the upper cylinder 51 in the radial direction. Here, the scattering prevention plate (51f) is formed at a position spaced apart from the upper surface of the conversion discharge hole (52e) when the lifting piston (52) is raised, and is preferably provided with a size to cover the conversion discharge hole (52e) Do.

Accordingly, it is possible to smoothly discharge the steam when the pressure conversion device 50 is opened, and it is possible to prevent the moisture condensed on the inner surface of the pressure conversion passage 53a from being scattered and discharged together with the steam. Due to this, safety accidents such as burns due to scattered moisture can be prevented, and contamination of the surface of the lid 10 or the interior of the steam cap 60 due to viscous rice water can be minimized, enabling safer and cleaner use. Do.

Meanwhile, the lower slide pipe portion 52b is provided with an inner diameter that exceeds the upper outer diameter of the lower cylinder 53, and the upper slide pipe portion 52c has an inner diameter that exceeds the lower outer diameter of the upper cylinder 51. Thus, the lifting piston 52 may be mounted to surround the outer circumference of the lower cylinder 53 and the outer circumference of the upper cylinder 51.

Accordingly, each slide pipe portion (52b, 52c) is guided along the outer periphery of each cylinder (51, 53) so that the lifting piston (52) is raised in the correct direction, and the opening and closing state of the pressure conversion passage (53a) is stably Can be converted.

In addition, ring-shaped sealing grooves 51d and 53b are recessed in the lower outer circumference of the upper cylinder 51 and the upper outer circumference of the lower cylinder 53 to mount sealing members 55 and 56.

At this time, it is preferable that a plurality of sealing ribs 55a and 56a protrude on the outer periphery of the sealing members 55 and 56. Accordingly, even when the lifting piston 52 is raised or lowered, the space between the slide pipe portions 52b and 52c and the cylinders 51 and 53 may be accurately sealed.

In addition, since the upper and lower inner circumferences of the upper and lower ends of the lifting piston 52 are supported by the ends of the sealing ribs 55a and 56a, radial flow is minimized so that the lifting piston 52 can be lifted in a more accurate direction, Since the shielding protrusion 52f and the pressure conversion passage 53a can maintain concentric alignment, accurate opening and closing of the pressure conversion passage 53a is possible.

On the other hand, it is preferable that the outer periphery of the lower slide pipe portion 52b has an elevating wing portion 52d protruding outward in the radial direction. At this time, the lifting blade portion 52d is pressed downward by a pressing means, so that the closed state of the pressure conversion passage 53a may be maintained.

Here, the pressing means may be provided with an elastic member 54 such as a spring having an elastic modulus corresponding to the abnormal pressure so that the pressure conversion passage 53a is forcibly opened above a predetermined abnormal pressure.

In detail, a spring support protrusion 51a is protruded on the outer periphery of the upper cylinder 51, and a washer member 51e having a size exceeding the diameter of the elastic member 54 is mounted at the lower end of the spring support protrusion 51a. do. Of course, the washer member 51e may be provided integrally with the spring support protrusion 51a, and the spring support protrusion 51a may be formed in an area corresponding to the diameter of the elastic member 54 Do.

In addition, as the elastic member 54 is interposed between the lifting blade portion 52d and the washer member 51e, a close contact state of the shielding protrusion 52f and the pressure conversion passage 53a may be maintained.

Of course, as shown in Fig. 4, the pressing means may be provided with a weight corresponding to the abnormal pressure and provided with a pressure load weight 154 coupled to the outer circumference of the lifting piston 152. In this case, the pressure load weight 154 may be provided in a ring shape and may be mounted on the upper surface of the lifting blade part 152d or integrally provided with the lifting blade part 152d.

Here, the ideal pressure is preferably set to a size exceeding the inner pressure of the inner pot controlled by the pressure response operating means 90 in the pressure cooking mode.

That is, when the pressure inside the inner pot is controlled by the pressure response operation means 90 in a state where the pressure conversion passage 53a is closed, the lifting piston 52 is applied by downward pressing force through the pressing means 54 and 154. The descending state of is maintained, and the pressure conversion passage (53a) may be closed.

At this time, when the pressure inside the inner pot is excessively increased due to a control error or failure of the pressure-responsive operation means 90, the shielding protrusion 52f is raised by the increased steam pressure, so that the pressure conversion passage 53a can be forcibly opened. have. Accordingly, a safety accident due to an excessive increase in pressure inside the inner pot can be prevented.

Here, the pressure conversion passage (53a) is preferably provided so as to be narrowed radially inward toward the upper side. Accordingly, the pressure area of the steam with respect to the shielding protrusion 52f may be reduced, and the pressure demand of the pressing means 54 for maintaining the lowered state of the lifting piston 52 may be reduced.

In addition, the shielding protrusion (52f) is provided so as to narrow inward in the radial direction toward the lower side, and the upper end of the pressure conversion passage (53a) is preferably provided with a sealing contact portion (53f) that is expanded radially outward toward the upper side. Do. Accordingly, when the lifting piston 52 descends, the inclined lower surface portion of the shielding protrusion 52f and the inclined inner surface portion of the sealing contact portion 53f are in contact with each other so that more accurate contact can be made.

On the other hand, the pressure switching means 50 is preferably arranged to be adjacent to the inner circumference of the locking ring (20). In addition, the upper surface of the locking ring 20 has a lift protrusion 24 that is inclined upward toward the confinement rotational direction along a portion opposite to the lifting blade 52d protruding on the outer periphery of the pressure switching means 50. It is preferable to stand out.

In detail, referring to FIGS. 1 to 3A, the pressure switching means 50 is arranged such that the lifting blades 52d of the lifting pistons 52 face the upper surface of the locking ring 20.

In addition, the lift protrusion 24 is formed along the inner circumference of the upper surface of the locking ring 20 that faces the lifting wing 52d when rotating the locking and unlocking of the locking ring 20, the locking rotation It is preferable to protrude upwardly inclined toward the direction. That is, the lift protrusion 24 has a low protrusion height of the portion facing the lower surface of the lifting wing 52d in the locked rotation state of the locking ring 20, and the unlocking rotation of the locking ring 20 In the state, the height of the protrusion of the portion facing the lower surface portion of the lifting blade portion 52d is formed to be high.

In detail, when the locking ring 20 is rotated, the lower end (24a) of the lift protrusion (24) facing the lifting blade (52d) is lowered so that the shielding protrusion (52f) is lowered so that the pressure conversion passage (53a) is It is set to be closed.

And, when the locking ring 20 is unlocked and rotated, the height of the highest end (24b) of the lift protrusion part 24 opposite to the lifting blade part 52d is between the shielding protrusion (52f) and the pressure conversion passage (53a). It is set so that a sufficient vapor flow area is formed. Accordingly, the opening/closing state of the pressure switching means 50 may be switched in conjunction with the rotation of the locking ring 20.

That is, as shown in FIGS. 2A and 3A, when the locking ring 20 is rotated in the unlocking direction while the locking ring 20 is locked, the lifting blade 52d slides along the inclined surface of the lift protrusion 24 and rises. .

At this time, it is preferable that the lower edge 52g of the lifting wing 52d is rounded so that the lift protrusion 24 in contact with the rotation of the locking ring 20 slides smoothly.

In addition, when the raised lifting blade 52d is supported by the upper end 24b of the lift protrusion 24, the pressure conversion passage 53a is completely opened, and the open state can be maintained.

At this time, the steam inside the inner pot is a steam flow hole, a steam discharge hole (58b), a communication hole (81a), a pressure conversion passage (53a), a conversion discharge hole (52e), a hollow of the upper cylinder (51), a steam cap portion (60). ) Can be discharged to the outside. Accordingly, the steam inside the inner pot is continuously discharged, and cooking can be performed in a non-pressure cooking mode in which the pressure inside the inner pot is not increased.

In addition, as shown in FIGS. 2B and 3B, when the locking ring 20 is rotated in the locking direction in the unlocked state, the lifting blade 52d slides along the inclined surface of the lift protrusion 24 and descends. .

And, when the lower end (24a) of the lifting blade (52d) and the lift protrusion (24) are disposed to face each other, the upward pressure on the lifting blade (52d) is released, so that the lifting piston (52) is lowered. The pressure switching flow path 53a can be completely closed.

At this time, since the lowering state of the lifting piston 52 is maintained by the pressurizing means 54, the steam inside the inner pot flows to the pressure response operation means 90 through the steam flow hole, and is selectively discharged according to the pressure level inside the inner pot. And the pressure inside the inner pot can be maintained at a certain level.

That is, when the pressure switching means 50 is closed, the pressure inside the inner pot is increased, so that the cooking can be performed in the pressure cooking mode, and when the pressure inside the inner pot rises above a certain level, the pressure response operating means 90 is opened. Steam inside the inner pot may be discharged to the outside through the steam flow hole, the pressure response operation means 90, and the steam cap unit 60.

In this way, according to the opening and closing of the pressure switching means 50, the non-pressure cooking mode for cooking that does not require pressure and the pressure cooking mode for cooking requiring high pressure such as pressure cooking can be easily switched to one device. The cooking method can be used freely, and since it is possible to cook according to the user's taste, such as the chewy texture of pressure rice and the soft texture of non-pressure rice, the compatibility of the product and the cooking quality can be improved.

Moreover, in the non-pressure cooking mode, since the lid 10 can be opened and closed freely because the pressure safety device is not driven, additional ingredients can be added during cooking or cooking conditions can be easily checked, thereby improving the usability of the product.

In addition, by simply rotating the handle part 11, the locking linking 20 is rotated and the open/closed state of the pressure switching means 50 is switched, so the non-pressure cooking mode and the pressure cooking mode can be easily selected and used. Convenience can be significantly improved. In addition, since the handle part and the pressure switching means 50 can be interlocked through a simple protrusion structure protruding on the locking ring 20 without any additional parts, the productivity of the product through a reduction in the number of parts and simplification of the connection structure between parts. And assembly properties can be improved.

In addition, since the steam inside the inner pot can be quickly discharged through the wide flow path inside the pressure converting means 50 by simply rotating the handle part 11 in the unlocking direction, a pressure weight in order to remove the residual pressure of the inner pot in the prior art A structure such as a tumbler pin for forcibly opening the valve 90a may be omitted, and in the non-pressure cooking mode, the steam discharge noise peculiar to the pressure weight valve 90a during cooking may be eliminated, so that the quietness of the product may be improved. .

On the other hand, Figure 7 is a cross-sectional view showing the lid of the electric cooker according to the second embodiment of the present invention. In the second embodiment, the basic configuration except for the shape of the lifting piston 252 is the same as that of the first embodiment, so a detailed description of the same configuration is omitted, and the same configurations are indicated by the same reference numerals.

As shown in Figure 7, the pressure conversion means 250 may be provided including a lower cylinder 253, a lifting piston 252, and a pressing means. At this time, the lifting piston 252 is disposed so as to pass through the upper through portion 13a, and is preferably coupled to the upper portion of the lower cylinder 253 so as to be able to move up and down.

In detail, a tab assembly protrusion 252m is protruded in the lower inner circumference of the lower slide pipe part 252b, and a tab engaging protrusion 253k and a protrusion receiving groove 253m are formed on the upper outer circumference of the lower cylinder 253.

Here, the inner circumference of the tab assembly protrusion 252m and the outer circumference of the tab engaging protrusion 253k are formed with a screw thread to be mutually fastened, and the protrusion receiving groove 253m extends the lower portion of the tab engaging protrusion 253k. Accordingly, it is formed with a vertical width corresponding to the lifting interval of the lifting piston 252.

That is, the tab assembly protrusion 252m is rotatably fastened to the tab engaging protrusion 253k and descends, and may be inserted into the protrusion receiving groove 253m through the thread of the tap engaging protrusion 253k. In this case, the tab assembly protrusion 252m may vertically flow from the lower end of the tap engaging protrusion 253k to a range corresponding to the inside of the protrusion receiving groove 253m.

Accordingly, while the lifting piston 252 is coupled to the upper portion of the lower cylinder 253 and can be raised and lowered in the vertical direction, the lifting piston 252 due to the steam discharge flow when the pressure conversion device 250 is opened, and Separation of the lower cylinder 253 may be prevented.

In addition, the upper slide pipe portion 252c is formed to extend to a length disposed through the upper through portion 13a. That is, the upper slide pipe part 252c is preferably provided with a length exposed to the upper side of the upper through part 13a in a state in which the shielding protrusion 252f is in close contact with the upper end of the pressure conversion passage 253a.

At this time, the pressing means may be provided as an elastic member 254 or a pressure load weight as in the first embodiment, and when the pressing means is provided as an elastic member 254, the upper end of the elastic member 254 May be supported on the lower edge of the upper through part 13a.

In addition, between the upper slide pipe portion 252c and the upper through portion 13a is sealed by a tubular sealing member 57, and a ring-shaped sealing groove portion 252k is recessed in the upper outer circumference of the upper slide pipe portion 252c. As a result, the inner circumferential sealing protrusion 57a of the tubular sealing member 57 may be caught and supported.

Here, the sealing groove (252k) is preferably formed to expand in the vertical direction so as to correspond to the lifting interval of the lifting piston (252). Accordingly, even when the lifting piston 252 is elevated, a close contact state of the sealing protrusion and the sealing groove 252k can be stably maintained.

At this time, when the lifting piston 252 is raised, the steam inside the inner pot is a steam flow hole, a steam discharge hole 58b, a communication hole 81a, a pressure conversion passage 253a, a conversion discharge hole 252e, and an upper slide pipe part. (252c), it can be discharged to the outside of the lid 10 through the steam cap portion 60, the inner circumference of the upper slide pipe portion 252c, a scattering prevention stepped portion 252h covering the upper portion of the switching discharge hole 252e ) Is preferably formed.

In this way, the inside of the inner pot can communicate with the outside of the lid 10 without a separate upper cylinder (refer to 51 in Fig. 1), but the sealing state between the upper cylinder and the upper slide pipe part 252c is maintained when the lifting piston 252 is elevated. Since the sealing member (refer to 55 of FIG. 1) for maintaining is omitted, the number of parts is reduced, so that the productivity and assembly properties of the product can be improved.

As described above, the present invention is not limited to each of the above-described embodiments, and it is possible to be modified and implemented by a person of ordinary skill in the technical field to which the present invention belongs without departing from the scope claimed in the claims of the present invention. And, these modifications are within the scope of the present invention.

100,200: electric cooker 10: lid
20: locking ring 30: handle base portion
40: lift lever part 50,250: pressure switching means
60: steam cap portion 70, 170: control plate
80,180: lead plate 90: pressure response operating means

Claims (16)

A main body in which an inner pot provided with a flange portion is accommodated at the top;
A lid coupled to an upper portion of the main body and opened and closed by means of opening and closing;
A locking ring selectively engaged with the flange portion in connection with the opening and closing means; And
It is disposed so as to penetrate the lid and includes a pressure switching means for switching and maintaining an open/closed state for discharging steam inside the inner pot in interlock with the means for opening and closing,
The upper surface of the locking ring is provided with a lift protrusion that is inclined upward toward the locking rotational direction along a portion facing the lifting blade protruding on the outer circumference of the pressure switching means,
The pressure conversion means
A lower cylinder disposed so as to pass through the lower surface of the lid and having a pressure conversion passage in communication with the inside of the inner pot;
A lifting piston in which the lifting blade protrudes on the outer periphery so that the opening and closing state of the pressure conversion passage is changed by being elevated along the inclined surface of the lift protrusion;
Comprising a pressurizing means coupled to the upper portion of the lower cylinder to pressurize the lifting blade so that the open/closed state of the pressure conversion passage is maintained,
The pressurizing means is an electric cooker, characterized in that it is provided with a pressure load weight provided on the outer circumference of the lifting piston with a weight corresponding to the abnormal pressure so that the pressure switching passage is forcibly opened above a preset abnormal pressure. The method of claim 1,
The pressure switching means includes a communication member that communicates the inside of the inner pot with the outside, and an opening/closing member that maintains one of an open and closed state of the communication member by pressure in a first direction,
The opening/closing member is an electric cooker, wherein the opening/closing state is switched by a link means for forming a pressure in a second direction opposite to the first direction when the means for opening/closing is rotated. The method of claim 1,
The electric cooker, characterized in that the main body is provided with an auxiliary locking means for locking the lid to selectively open and close when the locking ring is unlocked. The method of claim 1,
And a pressure-responsive operation means selectively opening and closing according to a pressure level inside the inner pot in the pressure cooking mode in which the pressure switching means is closed. The method of claim 4,
A steam cap part for guiding the vapor discharge of the pressure-responsive operation means and the pressure switching means is detachably provided on the upper surface of the lid,
The pressure-responsive operation means comprises a solenoid valve that opens and closes according to an electric signal, and a pressure weight valve having an additional weight that is raised or lowered according to the steam pressure inside the inner pot. The method of claim 1,
The pressure switching means is an electric cooker, characterized in that arranged to be adjacent to the inner circumference of the locking ring. delete The method of claim 1,
An electric cooker, characterized in that the rim of the lifting blade is formed to be rounded to slide when the lift protrusion is in contact. The method of claim 1,
The pressurizing means is mounted on the outer periphery of the lifting piston so that the pressure switching passage is forcibly opened above a preset abnormal pressure, and the electric cooker is provided with an elastic member having an elastic modulus corresponding to the abnormal pressure. delete The method of claim 1,
The lifting piston is
A shielding protrusion protruding from the lower surface thereof to shield the pressure conversion passage, and a switching discharge hole formed along the outer periphery of the shielding protrusion, and a seating plate part seated on the upper end of the lower cylinder
And a lower slide pipe portion extending downward from an outer end of the seating plate portion to surround the outer periphery of the lower cylinder. The method of claim 11,
The shielding protrusion is provided so as to be narrowed radially inward toward the lower side,
An electric cooker, characterized in that a sealing contact part extending radially outwardly extending upwardly so that the shielding protrusion is in contact with the shielding protrusion is formed at an upper end of the pressure switching passage. The method of claim 11,
The lifting piston further includes an upper slide pipe portion extending upward from the outer end of the seating plate portion and disposed to penetrate the upper surface portion of the lid,
An electric cooker, characterized in that a scattering prevention stepped portion is formed on an inner circumference of the upper slide pipe portion to cover an upper portion of the conversion discharge hole. The method of claim 11,
The pressure switching means further comprises an upper cylinder disposed to pass through the upper surface of the lid,
An electric cooker, characterized in that, at a lower end of the upper cylinder, there is provided a column fastening part which is divided in an arc shape so as to be fastened to the lower cylinder through the conversion discharge hole and extends downward. The method of claim 14,
An electric cooker, characterized in that a scattering prevention plate protruding radially inward so as to be disposed opposite the switching discharge hole is provided on the inner circumference of the upper cylinder. The method of claim 14,
The lifting piston further includes an upper slide pipe part extending upwardly from an outer end of the seating plate part to surround the outer circumference of the upper cylinder,
An electric cooker, characterized in that a sealing member is mounted on the outer circumference of the upper cylinder to seal the inner circumference of the upper slide pipe part.

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