JP5743989B2 - Method of preventing foam overflow from electric rice cooker and electric rice cooker - Google Patents

Description

  The present invention relates to an electric rice cooker having a function of preventing foam overflow and a method for preventing foam overflow from the electric rice cooker.

  In the electric rice cooker product, a large amount of heavy hot water bubbles are generated inside the body during the process of cooking rice and the process of cooking rice cake. If no control is applied to the product, the heavy water bubbles will be discharged out of the vessel through the steam path, affecting the cleaning of the product and the overall safety performance.

  Currently, there are mainly the following methods for preventing overflow of heavy hot water. One of them is the addition of ribs that intersect with the steam passage (for example, inside the steam valve), thereby reducing the total length of the motion trajectory from the inside of the container to the air outside the container. This is a method of reducing the rate at which bubbles bounce due to changes in surface tension during movement and the bubbles of heavy water overflow outside the body. The other is to install several parts in the steam passage so that when heavy metal bubbles come in contact with these parts during movement, they are stopped by these parts and pierced. This is a method of reducing the ratio of overflow. The other is a method in which steam or bubbles generated in the container are led to one independent space (for example, a water tank) so as not to be discharged outside the container by some specific devices. .

  However, the previous two methods described above cannot completely prevent the problem of foam overflow when the amount of foam of heavy hot water is large, and the reliability of preventing overflow of heavy hot water is low. In addition, since the third method needs to provide a separate space separately in the body, the size of the space of the rice cooker body is increased, the overall cost is increased, cleaning becomes inconvenient, etc. Brings a series of problems.

  In view of the above problems, it would be desirable to provide an improved foam overflow prevention structure and method that overcomes deficiencies in the prior art and meets the user's cleanability and safety requirements. ing.

  The present invention is intended to solve at least some of the above technical problems or to provide useful commercial choices.

  Therefore, one object of the present invention is to provide an electric rice cooker that can efficiently avoid the overflow of bubbles.

An electric rice cooker having a function of preventing foam overflow according to an embodiment of the present invention includes a surface lid provided with an exhaust hole, an inner lid provided below the surface lid and provided with a steam hole, A cover plate provided below the inner lid and provided with an intake hole, wherein the exhaust hole, the steam hole, and the intake hole together form a steam passage, and the foam that has entered the steam passage Is provided with a negative pressure generating device for generating the negative pressure region in the steam passage so as to expand and repel due to the pressure difference between the bubble internal pressure and the pressure in the negative pressure region .

  An electric rice cooker having a function of preventing foam overflow according to an embodiment of the present invention includes a surface lid provided with an exhaust hole, an inner lid provided below the surface lid and provided with a steam hole, A cover plate provided below the inner lid and provided with an intake hole, and the exhaust hole, the steam hole, and the intake hole together form a steam passage, and negative pressure is generated in the steam passage. A device is provided.

  According to the electric rice cooker of one embodiment of the present invention, by providing a negative pressure generator, the foam that has entered the steam passage expands and blows due to the pressure difference between the foam internal pressure and the negative pressure, so that the foam overflows. Can be avoided, the operation is simple, and the cost is low.

  The negative pressure generator is preferably close to the inlet of the intake hole.

  Optionally, a steam valve seat is provided between the inner lid and the lid plate, and an upper end of the steam valve seat is hermetically connected to the inner lid, and a lower end of the steam valve seat Is airtightly connected to the lid plate, and an upper opening communicating with the steam hole is provided at the upper end of the steam valve seat, and the lower end of the steam valve seat communicates with the intake hole. A lower opening is provided.

  Further, the negative pressure generating device includes a motor having a motor shaft, and a blade provided at a terminal of the motor shaft, and the motor is provided between the surface lid and the inner lid, The blade is provided between the inner lid and the lid plate, and the motor shaft is connected to the blade through the inner lid.

  By rotating the blade by the motor, a high-speed air flow is generated at the intake hole of the blade, and a local negative pressure region is formed in the vicinity of the intake hole.

  Specifically, the motor shaft is provided with a connector, and the motor shaft is connected to the blade via the connector.

  Preferably, the terminal of the motor shaft is provided with a first magnetic member, and the blade has a second magnetic member facing the first magnetic member along the axial direction or radial direction of the motor shaft. Is provided.

  Since the blades are suspended at the terminal of the connector by magnetic force, it is convenient for the user to remove and clean the blades.

  Preferably, the steam passage extends in a curved shape in the vertical direction.

  Specifically, the negative pressure generator includes a motor having a motor shaft, a shaft that is provided on the inner lid and extends from the inner lid toward the lid plate, and a blade that is rotatable about the shaft. The motor shaft does not pass through the inner lid, the terminal of the motor shaft is provided with a first magnetic member, and the blades extend along the axis or radial direction of the motor shaft. A second magnetic member facing the first magnetic member is provided.

  Since the motor shaft does not pass through the inner lid, it ensures that the rice cooker chamber of the motor and electric rice cooker are completely isolated, can prevent hot water vapor from entering the inside of the motor, and water vapor breaks the motor In addition, it is possible to avoid the occurrence of food hygiene problems due to water vapor contacting parts inside the motor.

  Preferably, the electric rice cooker further includes a temperature sensor electrically connected to the negative pressure generator.

  An electric rice cooker according to another embodiment of the present invention includes a body having a rice cooker chamber, and a lid for opening and closing the rice cooker chamber, and the lid body communicates the rice cooker chamber with the outside world. A steam passage is provided, and a negative pressure generating device for forming a negative pressure region is provided in the steam passage, and the negative pressure is generated so that the bubbles can repel when passing through the negative pressure region. The pressure in the pressure region is smaller than the pressure in the bubble in the steam passage.

  Preferably, the negative pressure region is close to an inlet where the steam passage communicates with the rice cooker chamber.

  Specifically, the lid includes a surface lid provided with an exhaust hole, an inner lid provided below the surface lid and provided with a steam hole, and an intake hole provided below the inner lid. And the exhaust hole, the steam hole, and the intake hole together form a steam passage.

  A method of preventing foam overflow in an electric rice cooker according to an embodiment of the present invention includes a step of generating a negative pressure in the steam passage with respect to the electric rice cooker provided with a steam passage. Bubbles that enter the passage are repelled by the negative pressure.

  According to the method for preventing foam overflow in the electric rice cooker of the embodiment of the present invention, by providing a negative pressure generating device, the foam that has entered the steam passage expands and repels due to the pressure difference between the foam internal pressure and the negative pressure. Thus, the overflow of bubbles can be avoided, the operation is simple, and the cost is reduced.

  Preferably, the negative pressure is generated after detecting that the steam temperature in the electric rice cooker has become higher than a predetermined temperature.

  Specifically, the negative pressure is generated when a motor drives and rotates a blade.

  Optionally, the negative pressure value is between 0.85 and 1 atmospheric pressure.

It is the schematic of the electric rice cooker by the Example of this invention. It is a bottom view of the rice cooker lid of the electric rice cooker by 1st Example of this invention. It is sectional drawing which follows the AA line in FIG. It is sectional drawing of the rice cooker lid of the electric rice cooker by 2nd Example of this invention. It is sectional drawing of the rice cooker cover of the electric rice cooker by 3rd Example of this invention. It is sectional drawing of the rice cooker cover of the electric rice cooker by 4th Example of this invention. It is sectional drawing of the rice cooker lid of the electric rice cooker by 5th Example of this invention. It is the schematic which shows engagement with the blade | wing and connector of the electric rice cooker shown in FIG. It is sectional drawing of the rice cooker cover of the electric rice cooker by 6th Example of this invention. It is sectional drawing of the rice cooker lid of the electric rice cooker by 7th Example of this invention.

  Hereinafter, the embodiments described with reference to the accompanying drawings are illustrative, and are intended to interpret the present invention, and should not be understood as limitations on the present invention.

  In the specification of the present invention, “center”, “vertical direction”, “horizontal direction”, “length”, “width”, “thickness”, “top”, “bottom”, “front”, “back” ”,“ Left ”,“ Right ”,“ Vertical ”,“ Horizontal ”,“ Top ”,“ Bottom ”,“ Inside ”,“ Outside ”,“ Clockwise ”,“ Counterclockwise ”, etc. The azimuth or positional relationship is the azimuth or positional relationship shown on the basis of the drawings, and is merely for facilitating the explanation of the present invention, and the shown apparatus or component always has a specific orientation. It should not be construed as a limitation on the present invention as it does not explicitly or imply that it is constructed and operated in a particular orientation. In the specification of the present invention, the term “plurality” means two or two or more unless specifically limited.

  In the present invention, terms such as “attach”, “connect”, “connect”, “fixed” and the like should be widely understood unless there is a clear definition or limitation separately, for example, fixed connection May be removably connected or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected through an intermediary Well, the inside of the two parts may be communicated. For those skilled in the art, the specific meaning of the above terms in the present invention will be understood by specific cases.

  In the present invention, the first feature and the second feature are in direct contact with each other if the first feature is “above” or “below” of the second feature, unless otherwise clearly defined or limited. And the first feature and the second feature are not in direct contact with each other but are in contact with each other via another feature. In addition, the first feature being “above”, “above”, or “upper surface” of the second feature includes that the first feature is directly above and obliquely above the second feature, Only the horizontal height of the feature is higher than the second feature. The first feature is “below”, “below” or “bottom surface” of the second feature includes that the first feature is directly below and obliquely below the second feature, and is simply horizontal to the first feature. Only the height is lower than the second feature.

  FIG. 1 is a schematic view of an electric rice cooker having a function of preventing foam overflow according to an embodiment of the present invention, and shows the principle of preventing foam overflow. The electric rice cooker includes a lid body 100 and a bowl body 200.

  More specifically, the cooker 200 has a rice cooker chamber for cooking food, and the lid 100 includes a surface lid 1, an inner lid 2 provided below the surface lid 1, A lid plate 3 provided below the inner lid 2. The front lid 1 is provided with an exhaust hole 11, the inner lid 2 is provided with a vapor hole 21, and the lid plate 3 is provided with an intake hole 31. The steam holes 21 correspond to the exhaust holes 11 and the intake holes 31, respectively. In other words, both ends of the steam holes 21 are connected to the exhaust holes 11 and the intake holes 31, respectively. Together with this, a closed steam passage is formed and used to discharge steam from inside the vessel body 200. One end of the steam passage communicates with the outside world, and the other end communicates with the rice cooker chamber of the body 200. In other words, as shown in FIG. 1, the inlet at the lower end of the intake hole 31 communicates with the rice cooker chamber of the body 200, and the outlet at the upper end of the exhaust hole 11 communicates with the outside. Here, it will be understood that the inlet of the intake hole 31 is the inlet of the steam passage, and the outlet of the exhaust hole 11 is the outlet of the steam passage.

  A negative pressure generator 107 is provided in the steam passage. The negative pressure generator 107 is for generating a negative pressure in the steam passage. For example, as shown in FIG. 1, the negative pressure generator 107 is connected to the negative pressure generator 107 in the steam passage. A negative pressure region 109 is formed around the periphery.

  Here, “negative pressure” refers to a pressure lower than the pressure inside the foam that has entered the steam passage, and “negative pressure region” means that the pressure in this region enters the steam passage. It is lower than the internal pressure of the foam. The value of the negative pressure is usually 0.85 to 1.0 standard atmospheric pressure.

  According to the electric rice cooker of the embodiment of the present invention, since the negative pressure generating device 107 is provided in the steam passage, the negative pressure generating device 107 has a negative pressure region (negative pressure space, low pressure region or 109) (also referred to as low pressure space), and the pressure in this negative pressure region 109 is lower than the pressure in the bubble. As a result, when the bubble enters the negative pressure region 109, the pressure inside the bubble is larger than the pressure outside the bubble, so that the bubble rapidly expands and repels due to the pressure difference, so that the bubble passes through the vapor passage with the vapor. And it can prevent that an electric rice cooker overflows.

  Preferably, the negative pressure generator 107 is provided close to the inlet of the intake hole 31 so that the negative pressure region 109 is close to the intake hole 31. By doing so, the foam which entered in the said steam channel | path can be bounced as soon as possible, and the effect which prevents a foam overflowing from an electric rice cooker can be heightened.

  In some preferred embodiments of the present invention, the steam passage extends in a curved manner in the lid 100. By doing so, the length of the steam passage can be extended, and the effect of preventing the overflow of bubbles can be further enhanced.

  Preferably, the electric rice cooker according to the embodiment of the present invention further includes a temperature sensor (not shown) electrically connected to the negative pressure generator 107, and the temperature detected by the temperature sensor has reached a predetermined temperature. At that time, the negative pressure generator 107 is activated to generate a negative pressure in the steam passage. The temperature sensor can detect the temperature in the rice cooker chamber. Preferably, a temperature sensor is provided in the lid 100, and the predetermined temperature may be a temperature when bubbles are about to be generated in the rice cooker chamber.

  For example, in use, when the rice water mixture 108 in the rice cooker chamber of the vessel 200 is heated and is about to boil, the temperature in the rice cooker chamber detected by the temperature sensor reaches a predetermined temperature, When the sensor outputs a signal and the negative pressure generator 107 starts to operate, a partial negative pressure region 109 is formed in the vicinity of the negative pressure generator 107, and the rice water mixture 108 in the rice cooker is continuously heated. As a result, the hot water bubbles begin to overflow from the rice water, and the steam and / or heavy water bubbles pass through the steam passage along the direction indicated by the arrow P in FIG. After the bubble enters the negative pressure region 109, the pressure inside the heavy water bubble is larger than the pressure outside the heavy water bubble, so that the bubble rapidly expands and bounces due to the effect of the pressure difference to avoid the overflow of the bubble. it can.

  Several specific embodiments according to the present invention will be described below with reference to the drawings.

<Example 1>
As shown in FIGS. 2 and 3, in the electric rice cooker according to the first embodiment of the present invention, the lid 100 includes a surface lid 1, an inner lid 2, and a lid plate 3. A steam valve seat 9 is provided in the lid 100, and the negative pressure generator 107 includes the motor 4 having the motor shaft 41 and the blades 6. The inner lid 2 is attached below the surface lid 1, and the surface lid 1 is provided with an exhaust hole 11. The lower side of the surface lid 1 surrounds the exhaust hole 11 and faces the inner lid 2. A ring-shaped rib 12 protruding to the inner lid 2 is provided, and a steam hole 21 having an upper end communicating with the exhaust hole 11 is provided on the inner lid 2. A lid seal ring 103 is provided. The steam valve seat 9 has an internal chamber 91, an opening is provided at the lower end of the internal chamber 91, and the opening of the internal chamber 91 constitutes the intake hole 31. Is in communication with the steam hole 21 and the rice cooker chamber of the body 200. In other words, the steam valve seat 9 is provided between the inner lid 2 and the lid plate 3, and the intake hole 31 includes the internal chamber 91 of the steam valve seat 9, and the exhaust hole 11, the steam hole 21, and the internal chamber. 91 constitutes a steam passage.

  As shown in FIG. 2, the upper end opening of the steam valve seat 9 is fitted below the inner lid 2 and covers the steam hole 21 and the through hole 22 in the inner lid 2. A seal rib 7 is provided at a fitting position with the seat 9, and sealing is performed at the seal rib 7.

  The motor 4 is provided between the surface lid 1 and the inner lid 2. Specifically, the inner lid 2 is provided with a through hole 22 at a location close to the vapor hole 21. The motor shaft 41 of the motor 4 is fixedly connected to the blade 6 through the through hole 22 downward.

  The blade 6 is attached to a space between the inner lid 2 and the steam valve seat 9, and is connected to the motor 4 via the connector 5. Specifically, the motor shaft 41 of the motor 4 is provided with a connector 5, the connector 5 is a plunger connector, the connector 5 is provided with a ball plunger 8, and the blade 6 is connected to the connector 6. 5 is fixed to the connector 5 via a ball plunger 8. When the motor 4 is operated, the motor shaft 41 rotates the blade 6 to form a negative pressure region in the steam passage.

  When the rice water in the vessel 200 is boiled and steam is generated, the steam enters the internal chamber 91 of the intake hole (that is, the intake hole 31), passes through the vapor hole 21, and finally the exhaust hole 11. It is discharged from the electric rice cooker. When the motor 4 is operated, the motor shaft 41 rotates the blade 6, and the blade 6 sucks from the rice cooker chamber through the intake hole 31, and the sucked steam is discharged from the exhaust hole 11 through the steam hole 21. After discharging from the electric rice cooker and forming a negative pressure region near the blade 6 and the bubble of heavy water rises to this negative pressure region, there is a pressure difference inside and outside the bubble, It can rapidly expand and rupture, avoiding foam overflow.

<Example 2>
As shown in FIG. 4, the lid 100 of the electric rice cooker according to the second embodiment of the present invention includes a surface lid 1, an inner lid 2, and a lid plate 3. The negative pressure generator 107 includes the motor 4 and the blades 6. The inner lid 2 is attached below the surface lid 1, and below the surface lid 1, ring-shaped ribs 12 surrounding the exhaust holes 11 and projecting toward the inner lid 2 are provided. 2 is provided with a vapor hole 21, a lid plate 3 is provided with an intake hole 31, and a surface lid seal ring 103 is provided between the ring-shaped rib 12 and the inner lid 2. ing. The internal chamber of the ring-shaped rib 12 constitutes a part of the exhaust hole 11. A seal ring 15 is provided between the lid plate 3 and the inner lid 2 to cover the intake holes 31 and the vapor holes 21.

  The motor 4 is attached between the front lid 1 and the inner lid 2. Specifically, the inner lid 2 is provided with a through hole at a location close to the vapor hole 21. The motor shaft 41 of the motor 4 is rigidly connected to the connector 5 through the through-hole downward, and the connector 5 is detachably fixedly connected to the blade 6. Yes.

  The blade 6 is attached to the space between the inner lid 2 and the lid plate 3 and is connected to the motor 4 via the connector 5. Specifically, a connector 5 is provided on the motor shaft 41 of the motor 4, a first magnetic member (first magnet) 51 is provided on the connector 5, and a second is provided on the blade 6. A magnetic member (second magnet) 61 is provided, the magnetic poles of the second magnet 61 and the first magnet 51 are arranged in the radial direction, and the blade 6 has a diameter of the second magnet 61 and the first magnet 51. It is suspended at the end of the motor shaft 41 by the magnetic attractive force in the direction. When the motor 4 operates, the motor shaft 41 rotates the connector 5, and the first magnet 51 generates an axial twisting moment with respect to the second magnet 61 to drive and rotate the blade 6.

  When the rice water in the vessel body boils and steam is generated, the steam sequentially passes through the intake hole 31 and the steam hole 21 and is finally discharged from the exhaust hole 11 to the outside of the electric rice cooker. When the motor 4 is operated, the motor shaft 41 rotates the blade 6, and the blade 6 sucks from the rice cooker chamber through the intake hole 31, and the sucked steam is discharged from the exhaust hole 11 through the steam hole 21. After discharging from the electric rice cooker and forming a negative pressure region in the vicinity of the blade 6 and the bubble of heavy water rises to this negative pressure region, there is a pressure difference between the inside and outside of the bubble, so the bubble is rapidly It can be expanded and bounced to avoid the overflow of bubbles.

<Example 3>
As shown in FIG. 5, the electric rice cooker according to the third embodiment of the present invention is substantially the same as the second embodiment. The difference is that in this embodiment, the connector 5 is a plunger connector, and the blade 6 is fixed to the connector 5 via a ball plunger 8. When the motor 4 operates, the motor shaft 41 rotates the blade 6 through the connector 5 to generate a negative pressure region.

<Example 4>
As shown in FIG. 6, the electric rice cooker according to the fourth embodiment of the present invention is substantially the same as the second embodiment. The difference is that in this embodiment, the connector 5 is a screw connector, and the blade 6 is fixed to the connector 5 by screwing a nut 14. When the motor 4 operates, the motor shaft 41 rotates the blade 6 through the nut 14 to form a negative pressure region.

<Example 5>
As shown in FIG. 7, the electric rice cooker according to the fifth embodiment of the present invention is substantially the same as the second embodiment. The difference is that the magnetic poles of the second magnet 61 and the first magnet 51 are arranged in the axial direction, and the blade 6 has a motor shaft 41 due to the magnetic attractive force in the axial direction of the second magnet 61 and the first magnet 51. Is floating on the terminal. Specifically, as shown in FIG. 8, the connector 5 has a non-circular columnar structure, and the blade 6 is provided with a non-circular hole corresponding to the columnar structure. When the motor 4 operates, the motor shaft 41 rotates the connector 5, and the connector 5 is rotated together with the blades 6 by a non-circular columnar structure, thereby forming a negative pressure region.

<Example 6>
As shown in FIG. 9, the lid 100 of the electric rice cooker according to the sixth embodiment of the present invention is fitted to the surface lid 1, the inner lid 2 attached below the surface lid 1, and the lower portion of the inner lid 2. And a fitted lid 3. The negative pressure generator 107 includes the motor 4 and the blades 6. The blade 6 and the seal ring 15 are attached between the inner lid 2 and the lid plate 3, the surface lid 1 is provided with an exhaust hole 11, and the inner lid 2 has a shaft 62 and a steam hole. 21 is provided, the blade 6 is attached to the shaft 62, and the suction hole 31 is provided in the cover plate 3. The motor 4 is attached between the front lid 1 and the inner lid 2, the connector 5 is attached to the end of the motor shaft 41, and the connector 5 is provided with a first magnet 51. A second magnet 61 is provided in the blade 6. The first magnet 51 and the second magnet 61 are arranged in parallel vertically and correspond to poles having different magnetic poles. Since the motor shaft 41 does not pass through the inner lid 2, the motor shaft 41 is not directly connected to the blade 6, and is not indirectly connected to the blade 6 via the connector 5.

  Specifically, the blade 6 is attached to the shaft 62 and is rotatable around the shaft 62, and the blade 6 is formed by the magnetic force of the first magnet 51 and the second magnet 61 and the inner lid 2 and the lid plate 3. It is suspended in the space between.

  When the rice water in the vessel body boils and steam is generated, the steam enters the intake hole 31, passes through the steam hole 21 of the inner lid 2, and finally discharges the electric rice cooker from the exhaust hole 11. When the motor 4 operates, the motor shaft 41 rotates the connector 5, and at this time, the first magnet 51 in the connector 5 rotates the second magnet 61 in the blade 6 by magnetic force. Then, the steam sucked from the rice cooker chamber through the suction hole 31 is discharged from the exhaust hole 11 through the steam hole 21 and forms a negative pressure region in the vicinity of the blade 6. When the bubble of heavy water rises to this negative pressure region, there is a pressure difference between the inside and outside of the bubble, so that the bubble can rapidly expand and bounce and avoid the overflow of the bubble.

<Example 7>
As shown in FIG. 10, the electric rice cooker according to the seventh embodiment of the present invention is substantially the same as the sixth embodiment. The difference is that the first magnet 51 attached to the end of the motor shaft 41 and the second magnet 61 in the blade 6 are concentrically attached, and the driving force of the blade 6 is the first magnet 51 and the second magnet. It consists of a suction force in the radial direction between 61 and 61. When the motor 4 operates, the motor shaft 41 rotates the connector 5. At this time, the first magnet 51 in the connector 5 rotates by driving the second magnet 61 in the blade 6 by the magnetic force. A pressure region is formed.

  Hereinafter, a method for preventing the overflow of bubbles in the electric rice cooker according to the embodiment of the present invention will be described.

  According to an embodiment of the present invention, the method for preventing the overflow of bubbles in the electric rice cooker generates a negative pressure in the steam passage in the electric rice cooker, and the bubbles entering the steam passage are repelled by the negative pressure. Includes steps.

  In an embodiment of the present invention, the negative pressure is generated by a blade provided in the vicinity of the intake hole. The negative pressure generated by the rotation of the blade is, for example, 0.85 to 1.0 standard atmospheric pressure. Since this negative pressure is lower than the pressure in the bubble, the bubble expands and blows due to the pressure difference between the inside and outside. It should be noted that the negative pressure region can be formed in the steam passage using other methods.

  Preferably, energy consumption is reduced by generating the negative pressure after the steam temperature in the electric rice cooker becomes higher than a predetermined temperature.

  In the description herein, terms such as “one example”, “some examples”, “exemplary”, “specific examples”, or “some examples” refer to this example or examples. It is meant that the specific features, structures, materials, or characteristics described in combination are included in at least one embodiment or illustration of the invention. In this specification, exemplary descriptions of the above terms do not necessarily refer to the same examples or illustrations. In addition, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more of the examples or examples.

  As mentioned above, although the Example of this invention was illustrated and described, it will be understood that the said Example is an illustration and must not be understood as the limitation with respect to this invention.

Claims (9)

A surface lid provided with exhaust holes;
An inner lid provided below the surface lid and provided with a vapor hole;
A lid plate provided below the inner lid and provided with an intake hole;
The exhaust hole, the steam hole and the intake hole together form a steam passage,
A negative pressure generating device for generating the negative pressure region is provided in the steam passage so that the bubbles entering the steam passage expand and repel due to the pressure difference between the bubble internal pressure and the pressure in the negative pressure region. An electric rice cooker having a function of preventing foam from overflowing.   The electric rice cooker having a function of preventing foam overflow according to claim 1, wherein the negative pressure generating device is close to an inlet of the intake hole.   A steam valve seat is provided between the inner lid and the lid plate, an upper end of the steam valve seat is hermetically connected to the inner lid, and a lower end of the steam valve seat is the lid plate The upper end of the steam valve seat is provided with an upper opening communicating with the steam hole, and the lower end of the steam valve seat is provided with a lower opening communicating with the intake hole. The electric rice cooker having the function of preventing foam overflow according to claim 1.   The negative pressure generating device includes a motor having a motor shaft, and a blade provided at a terminal of the motor shaft, and the motor is provided between the surface lid and the inner lid, The foam according to any one of claims 1 to 3, wherein the foam is provided between the inner lid and the lid plate, and the motor shaft is connected to the blades through the inner lid. Electric rice cooker with overflow prevention function.   The electric having a function of preventing overflow of bubbles according to claim 4, wherein the motor shaft is provided with a connector, and the motor shaft is connected to the blade via the connector. rice cooker.   The terminal of the motor shaft is provided with a first magnetic member, and the blade is provided with a second magnetic member facing the first magnetic member along the axial direction or radial direction of the motor shaft. The electric rice cooker having the function of preventing foam from overflowing according to claim 4.   The electric rice cooker having a function of preventing foam from overflowing according to claim 1, wherein the steam passage extends in a curved shape in the vertical direction.   The negative pressure generating device includes a motor having a motor shaft, a shaft provided on the inner lid and extending from the inner lid toward the lid plate, and a blade that is rotatable about the shaft. The shaft does not pass through the inner lid, a first magnetic member is provided at the end of the motor shaft, and the first magnetic member is provided on the blade along the axis or radial direction of the motor shaft. The electric rice cooker which has the function to prevent the overflow of the foam according to any one of claims 1 to 3, characterized in that a second magnetic member is provided so as to be opposed to.   The electric rice cooker having a foam overflow prevention function according to any one of claims 1 to 3, further comprising a temperature sensor electrically connected to the negative pressure generator.

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