KR100235452B1 - Electric pressure rice cooker - Google Patents

Abstract

The present invention relates to an electric pressure cooker, and more particularly to an electric pressure cooker for coupling and separating the inner cylinder and the lid by the driving of the motor, and controlling the driving of the motor by detecting the coupling and separation state.

The electric pressure cooker according to the present invention includes a main body of a rice cooker in which an inner cylinder is filled with rice, a lid for opening and closing the inner cylinder, a locking means for locking or unlocking the lid and the inner cylinder by combining the lock and the lock. Means are provided on the lid and the locking member to be caught on the rim of the inner cylinder, the rotary member to linearly reciprocate the locking member to cause the locking member to be caught or released in the inner cylinder, the motor for driving the rotating member, and the locking A differential transformer for detecting a locked state to detect the operation of the member to control the driving of the motor. Therefore, the electric pressure cooker according to the present invention improves the inconvenience that the user needs to operate by hand by automatically coupling and separating the inner cylinder and the lid by controlling the driving of the motor according to the cooking or not, and combining the inner cylinder and the lid. The advantage is precise control of separation.

Description

Electric pressure cooker

The present invention relates to an electric pressure cooker, and more particularly, to an electric pressure cooker for coupling and separating the inner cylinder and the lid by driving of the motor, and controlling the driving by sensing the coupling and separating state.

In general, the pressure cooker is to increase the pressure of the inner container containing the rice when cooked by using the boiling point of the water according to the pressure to improve the boiling point of the water to improve the taste of the cooked rice.

The higher the rate at which the starch is alphaized, the higher the sweetness. The higher the rate at which the starch is alphaized, the higher the water temperature is near 100 ° C. In other words, when the pressure of the inner barrel is increased, the boiling point of the water is increased, so that the ratio of alpha of the rice in the inner barrel is increased, thereby improving the taste of the rice. This is why rice cooked by a pressure cooker occupies and tastes more than a general cooker.

On the other hand, in order to increase the pressure in the inner cylinder, the inner cylinder in which the rice is contained is sealed so that steam generated during cooking does not leak, and the inside of the inner cylinder is to be high pressure by the steam. Pressure cooker (Korean Utility Model Publication No. 90-11191), as shown in Figure 1, the hollow body of the rice cooker body 10 of the hollow body with the upper surface is built in the cooker body (1) containing rice The cover 9 is coupled to the opening to be openable and closeable. The bottom of the cover (9) is provided with a pot lid (7) which is sealed and combined with the cooker body (1) when cooking, a plurality of coupling stones (7a) is provided at a predetermined interval on the outer periphery of the pot lid. The opening end of the upper pot body 1 is bent inwardly, and the bent portion is formed with an incision groove 2b into which the engaging stone 7a is inserted when the cover 9 is closed to the main body 10. . A coupling wheel 4 having the same width as that of the bent portion is rotatably coupled to the bottom of the bent portion, and an incision groove 4b and a locking portion 4c are formed in the coupling wheel. Reference numeral 5 is a coupling wheel handle for rotating the coupling wheel.

The method of combining and separating the pot lid and the pot body of the conventional electric pressure cooker as described above will be briefly described. The cover 9 is covered with the main body 10 so that the coupling protrusion 7a of the lid is inserted into the cutout groove 4b of the pot body. Then, when the handle 5 is rotated in one direction, the locking portion 4c of the coupling wheel is caught by the engaging stone 7a so that the pot lid and the pot body are hermetically coupled, and when the handle is rotated in the other direction, the pot lid and the pot body are It is to be separated.

However, the conventional electric pressure rice cooker configured as described above has a disadvantage in that a large force is required to rotate the handle of the coupling wheel due to the residual pressure of steam remaining inside the cooker body after cooking. In addition, the handle of the engaging ring protrudes out of the cooker body, there was a disadvantage in the aesthetic appearance.

In addition, the handle also becomes a high temperature due to the high temperature during cooking, due to this problem, the conventional electric pressure cooker had an uneconomical disadvantage in that a separate insulation to be attached to the handle portion.

The present invention is to solve the above problems, an object of the present invention is to provide an electric pressure cooker that is automatically firmly coupled to the rice cooker lid and the inner container containing the rice, and easily separated.

1 is a perspective view showing the configuration of a conventional electric pressure cooker,

Figure 2 is a perspective view showing the configuration of the electric pressure cooker according to the present invention,

3 is an exploded perspective view of the lid of the electric pressure cooker according to the present invention;

4 is a perspective view showing an installation structure of a differential transformer according to the present invention;

Figure 5 is a block diagram showing the configuration of the electric pressure cooker according to the present invention,

6 is a cross-sectional view showing a separation state of the locking member of the electric pressure cooker according to the present invention;

7 is a cross-sectional view showing a coupling state of the locking member of the electric pressure cooker according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Main body, 114. Electronic heating heater, 120. Key operation unit,

130. inner tube, 140 lid, 150 auxiliary lid,

170 solenoid valve, 180 rotating member, 190 locking member

200. motor, 210. locked state detection unit, 211. core,

212 .. 1st coil, 213 .. 2nd coil, 300 .. Control part.

The present invention for achieving the above object is, the main body of the cooker is built in the inner container in which the rice is embedded, the lid having to open and close the inner cylinder, by combining the lid and the inner cylinder locking means for locking or unlocking In pressure cooker,

The locking means is provided on the lid and the locking member caught on the rim of the inner cylinder, the rotary member to linearly reciprocate the locking member so that the locking member is caught or released in the inner cylinder, a motor for driving the rotating member; It includes a locked state detecting unit for controlling the operation of the motor by detecting the operation of the locking member, the locked state detecting unit is characterized in that consisting of a differential transformer.

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

Figure 2 is a perspective view showing a schematic structure of the electric pressure cooker according to the present invention. As shown in the drawing, the electric pressure cooker of the present invention is provided with a cooker body 100 of a hollow body having an upper surface. The hollow portion 111 of the main body 100 has a built-in inner cylinder 130 having an upper surface containing rice, the opening 131 of the inner cylinder 130 is formed with a hook frame 132 bent to the outside The engaging frame 132 is coupled to the locking member 190 described later. And the upper side of the main body 100 is coupled to the opening 131 of the inner cylinder 130, the lid 140 for sealing the inner cylinder 130 is installed to open and close. The front surface of the main body 100 is provided with a key operation unit 120 for operating the electric pressure cooker, one side of the main body 100 is provided with a power supply 113 connected to the key operation unit 120. In addition, when electricity is supplied to the rice cooker through the power supply unit 113 on the bottom of the hollow part 111 of the main body 100, a magnetic force line is generated around the electronic heater so as to self-heat the inner cylinder 130 by the magnetic force ( Not shown) is installed in a wound shape spaced apart from the inner cylinder by a predetermined interval. Reference numeral 171 denotes a steam discharge hole for discharging steam generated during cooking to the outside of the main body 100 to prevent the inner cylinder 130 from becoming a high pressure above a predetermined pressure. 150, 160 is an auxiliary lid and the sealing member which will be described in detail below.

The electric pressure cooker according to the present invention is provided with a means for automatically coupling and separating the lid 140 and the inner cylinder 130 according to cooking, and the lid 140 and the inner cylinder 130 are completely coupled and separated. It is provided with a motor drive control means for detecting the driving to control the drive of the motor.

3 is an exploded perspective view of the locking member and the rotating member installed inside the lid of the electric pressure cooker according to the present invention. With reference to this it will be described a locking member and a motor drive control means for coupling and separating the lid and the inner cylinder of the electric pressure cooker.

An auxiliary lid 150 formed of a plate having the same size and the same shape as the opening 131 of the inner cylinder 130 is coupled to the bottom of the lid 140. When the lid 140 is coupled to the main body 100, the auxiliary lid 150 is coupled to the opening 131 of the inner cylinder 130 to seal the inner cylinder 130.

Means for coupling and separating the lid 140 and the inner cylinder 130 is composed of a rotating member 180 and the locking member 190. The rotating member 180 is provided on the upper surface of the auxiliary lid 150 and rotates by driving the motor 200. The lower surface of the rotating member 180 is provided with a motor 200 is screwed to the auxiliary lid 150 to be seated in the case 202, the lower surface of the rotating member 180, the drive shaft of the motor 200 Coupling groove 181 is coupled to the 201 is formed.

In addition, the lower surface of the rotating member 180 is formed with a guide path 182 for guiding the movement of the locking member 190 so that the locking member 190 can linearly reciprocate. The guide path 182 is formed in communication with each other, and the radius of the guide member 182 is formed differently from the center of the rotating member 180. That is, the radius of the guide path 182 is continuously changed in accordance with the rotation of the rotary member 180, the locking member 190 coupled to the guide path is a linear reciprocating motion according to the radius change of the guide path 182 Will be

The locking member 190 is composed of a connection link 191, a locking portion 192, and a circular protrusion (191a). The locking member 190 is provided with a plurality of radially, one side of the connection link 191 is formed with a circular protrusion (191a) to be inserted into the guide path 182, the other side is the locking portion 192 Is combined.

The locking member 190 has a circular protrusion 191a is fitted into the guide path 182 of the rotating member 180, so that the locking member 190 is linearly reciprocated according to the rotation of the rotating member 180. do. In order to smoothly perform such an operation, a support member 193 is provided on an upper surface of the auxiliary lid 150 to guide the linear reciprocating motion of the locking member 190.

In addition, the engaging portion 192 is formed at the end of the bent portion 192a bent downward, inward, the bent portion 192a is the hook 132 of the inner cylinder during the reciprocating movement of the locking member 190 To be combined or separated.

On the other hand, the electric pressure cooker according to the present invention detects the position of the locking member 190 to know the locking and unlocking state of the inner cylinder 130 and the lid 140, thereby controlling the driving of the motor 200 do. The means for controlling the driving of the motor 200 is a differential transformer using an electromagnetic induction action is provided with a primary coil and a secondary coil wound around the iron core and a core for linear reciprocating motion between them. The differential transformer generates an output voltage on the secondary coil when AC power is applied to the primary coil, and the output voltage of the secondary coil is changed according to the change in the position of the core.

The present invention utilizes the characteristics of such a differential transformer. Referring to FIG. 4, a plate-shaped core 211 is fixedly installed to linearly reciprocate with the locking member 190 on an upper surface of the connection link 191 of the locking member 190. The primary coil 212 and the secondary coil 213 are respectively installed on the upper side of the supporting member 193 fixed to the upper surface of the auxiliary lid 150 to guide the movement of the locking member 190. Therefore, since the core 211, which is in linear motion with the engaging member 190, moves between the primary coil 212 and the secondary coil 213, the output voltage of the secondary coil 213 can be changed. Will be.

In this case, when the core 211 exits between the two coils 212 and 213, that is, the output voltage of the secondary coil 213 in which the locking member 190 is unlocked is referred to as a primary set voltage. When 211 is positioned between the two coils 212 and 213, that is, when the output voltage of the secondary coil 213 in the locked state of the locking member 190 is a secondary set voltage, the controller controls the secondary coil 213. The output voltage is compared with the first and second set voltages to determine the locking and unlocking state of the locking member 190, thereby controlling the driving of the motor 200.

Figure 5 is a block diagram showing the configuration of the electric pressure cooker according to the present invention. As shown in the drawing, the control unit 300 for controlling the overall system of the electric pressure cooker, the key operation unit 120 receives the function selection signal from the user, the inner cylinder 130 and the lid 140 are combined, Motor heating unit 330 for driving the motor 200 to be separated, and the electric heating heater is wound around the bottom of the inner cylinder 130 and generates a magnetic force line when the power is supplied to cause the inner cylinder to cook by self-heating The heater driving unit 320 for driving the 114, the locked state detecting unit 120 for detecting the engagement and separation state of the inner tube and the lid by the drive of the motor 200, and the lid 140 according to the cooking Pressure control device that controls the opening and closing of the steam discharge hole 171 formed in the inner cylinder 130, that is, the solenoid valve 170, and the voltage of the solenoid valve 170 driving and applied according to the cooking progress Solenoid drive to control The unit 172 is provided.

In the above configuration, the locked state detecting unit 210 is a differential transformer in which the output voltage of the secondary coil 213 varies according to the position change of the core 211.

Next, the operation of the electric pressure cooker according to the present invention configured as described above will be described in detail with reference to FIGS. 6 and 7.

As shown in FIG. 6, when the user operates the key manipulation unit 120 and the cooking function is selected, the controller 300 checks the locked state of the locking member 190 through the locked state detecting unit 210. At this time, since the core 211 is in a state of exiting between the two coils 212 and 213 in the initial state, the secondary coil 213 outputs the primary set voltage. Based on this output voltage, the control unit 300 detects that the locked state is released, and drives the motor 200 for rotating the rotating member 180.

When the motor 200 is driven, the rotating member 180 is rotated, and the locking member 190 caught in the guide path 182 of the rotating member moves toward the center of the rotating member 180 to lock the locking member 190. Is locked.

As shown in FIG. 7, when the locking member 190 moves toward the center by the rotation of the rotating member 180, the core 211 interlocking with the locking member 190 is disposed between the primary and secondary coils 212 and 213. Is located. At this time, the secondary coil 213 outputs the secondary set voltage, through which the control unit 300 detects that the locking member 190 is locked and stops the driving of the motor 200. When the driving of the motor 200 is stopped, the locking portion 192 and the locking frame 132 are firmly coupled so that the auxiliary lid 150 and the inner cylinder 130 are kept in a closed state.

In this state, power is applied to the electronic heating heater 114 provided in the lower portion of the inner cylinder 130, and cooking is performed. When the cooking is completed, the locking of the locking member 190 is canceled in the reverse order of the above process.

As described in detail above, the electric pressure cooker according to the present invention can improve the inconvenience that the user must operate by hand by automatically coupling and separating the inner cylinder and the lid by controlling the driving of the motor according to cooking. .

In addition, by controlling the driving of the motor by detecting the coupling and separation of the inner cylinder and the lid by the differential transformer there is an advantage that can accurately control the coupling and separation of the inner cylinder and the lid at the time of cooking.

Claims (2)

In the electric pressure cooker having a main body of the cooker is built in the inner container in which the rice is contained, the lid for opening and closing the inner cylinder, the locking means for locking or unlocking by combining the lid and the inner cylinder, The locking means is provided on the lid and the locking member caught on the rim of the inner cylinder, the rotary member to linearly reciprocate the locking member so that the locking member is caught or released in the inner cylinder, a motor for driving the rotating member; And a locked state detecting unit for controlling the driving of the motor by sensing the operation of the locking member, wherein the locked state detecting unit comprises a differential transformer. The method of claim 1, The differential transformer is coupled to one side of the lid and the secondary coil is applied to the AC power and the output voltage is generated, and is fixed to the locking member between the primary coil and the secondary coil by the movement of the locking member Electric pressure cooker comprising a core entering or exiting.

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