JP7329756B2 - rice cooker - Google Patents

Description

The present disclosure relates to rice cookers.

As a conventional rice cooker, a fully automatic rice cooker that integrates a rice container, pouring water, and rice cooking processes is known. A conventional rice cooker includes a storage unit for storing rice, a rice washing space for washing rice, and a rice cooking unit (see Patent Document 1).

JP-A-5-220047

In a conventional rice cooker, when the rice is automatically put into the pot, it may form a heap and the rice may not be completely submerged in water. Therefore, there is a problem that the rice soaked in water and the rice not soaked are cooked unevenly, and the taste of the rice after cooking is spoiled.

An object of the present disclosure is to provide a rice cooker capable of reducing unevenness in cooking.

A rice cooker according to an aspect of the present disclosure includes a pot,
a housing that accommodates the pot;
a lid that closes the opening of the pot;
a pressure valve that operates to open and close a hole that communicates the inside of the pan with the external space;
a rice container that is provided in the housing and stores rice;
a rice transfer unit for transferring rice from the rice container to the pot;
a heating unit that heats the pot;
a boiling detection unit that detects that the water in the pot has boiled;
an input unit that receives an operation instruction from a user;
a control unit that controls movement of rice by the rice feeding unit, heating by the heating unit, and opening and closing of the pressure valve;
and a rice cooker of an automatic feeding type that moves a specified amount of rice and water determined based on the operation instruction to the pot to cook the rice.
When the specified amount is the first amount, the control unit sets the time from closing to opening of the pressure valve to the first time, and when the specified amount is the second amount, the setting the time from closing to opening of the pressure valve to a second time, wherein the first amount is greater than the second amount and the first time is greater than the second time set to

According to the rice cooker according to the present disclosure, uneven cooking can be reduced.

A perspective view showing the appearance of the rice cooker according to the embodiment. FIG. 2 is a perspective view showing the internal structure of the rice cooker of FIG. 1; The perspective view which shows the principal part of the rice cooker of FIG. Plan view of the rice cooker of FIG. Cross-sectional view of the rice cooker viewed in the VV direction of FIG. Perspective view showing the rice cooker with the rice container lid open Partial side view of rice cooker showing rice container lid in closed position Partial side view of rice cooker showing rice container lid in open position Perspective view showing the rice cooker with the door open Perspective view showing the rice cooker with the water container removed Exploded perspective view showing the configuration of the Peltier unit An exploded perspective view showing the configuration of the rice weighing unit. Sectional view showing the state of the rice weighing unit during rice feeding FIG. 12 is an enlarged view of a part of the cross-sectional view of FIG. 12 Cross-sectional view showing the state of the rice weighing unit when rice is not fed Sectional view showing the rice weighing part in the non-attached state Top view of rice separator Place the rice separator in the XVII-XVII direction of FIG. Cross-sectional view of the rice separator viewed in the XVIII-XVIII direction of FIG. Perspective view showing the configuration of the rice feeding lid opening and closing device Disassembled perspective view of the rice feeding lid opening and closing device of FIG. Plan view of the rotating body of FIG. Sectional view showing the rice feeding lid opening/closing device in the closed state Cross-sectional view showing the rice feeding lid opening/closing device in an open state Cross-sectional view showing a cross-section parallel to the YZ plane through the outlet of the water container Exploded perspective view showing the configuration of the water level sensor FIG. 2 is an exploded perspective view showing the configuration around the water container housing Block diagram illustrating the hardware configuration of the rice cooker according to the present embodiment Flowchart showing an example of the operation of the rice cooker according to the present embodiment A flow chart showing the flow of the process of detecting the amount of stored rice in FIG. Flowchart showing the flow of the rice transfer process in FIG. Flowchart showing the flow of rice transfer amount measurement processing in FIG. A flow chart showing the flow of the water supply process in FIG. A flow chart showing the flow of the stirring process in FIG. A graph schematically showing the relationship between the time and the temperature inside the pot during the rice cooking operation. Schematic enlarged view of region R in FIG. Graph showing a comparative example of the relationship between the time and the temperature inside the pot during the rice cooking operation Flowchart showing a modification of the stirring process in FIG. Graph showing the difference in temperature (pressure) change depending on the amount of rice cooked in the stirring process of FIG. Flowchart showing the flow of rice transfer amount measurement processing according to another embodiment of the present disclosure Flowchart showing a modification of the water supply process in FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby.

(Embodiment)
According to a first aspect of the present disclosure,
a pot and
a housing that accommodates the pot;
a lid that closes the opening of the pot;
a pressure valve that operates to open and close a hole that communicates the inside of the pan with the external space;
a rice container that is provided in the housing and stores rice;
a rice transfer unit for transferring rice from the rice container to the pot;
a heating unit that heats the pot;
a boiling detection unit that detects that the water in the pot has boiled;
an input unit that receives an operation instruction from a user;
a control unit that controls movement of rice by the rice feeding unit, heating by the heating unit, and opening and closing of the pressure valve;
An automatic rice cooker that moves a specified amount of rice determined based on the operation instruction to the pot and cooks the rice,
When the specified amount is the first amount, the control unit sets the time from closing to opening of the pressure valve to the first time, and when the specified amount is the second amount, the setting the time from closing to opening of the pressure valve to a second time, wherein the first amount is greater than the second amount and the first time is greater than the second time Provide a rice cooker, set to.

According to the second aspect of the present disclosure, the control unit closes the pressure valve to increase the pressure in the pot after the boiling detection unit detects boiling, and then opens the pressure valve to increase the pressure in the pot. Provided is a rice cooker according to a first aspect, wherein the rice cooker according to the first aspect is controlled to stir the rice in the pot by generating bumping by suddenly lowering the internal pressure.

According to the third aspect of the present disclosure,
Further comprising a pressure sensor for detecting the pressure in the pan,
The rice cooker according to the first aspect or the second aspect, wherein the control unit opens the pressure valve when the pressure detected by the pressure sensor reaches or exceeds a predetermined threshold.

A fourth aspect of the present disclosure provides the rice cooker according to the third aspect, wherein the predetermined threshold is 5 kPa to 30 kPa.

Hereinafter, rice cookers according to embodiments will be described with reference to the accompanying drawings. In addition, the same code|symbol is attached|subjected about the substantially same member in drawing.

In the following, for convenience of explanation, terms such as "up", "down", "front", and "back" are used assuming normal use. However, these terms do not mean to limit the usage conditions of the rice cooker of the present invention.

[1. composition]
[1-1. overall structure]
FIG. 1 is a perspective view showing the appearance of a rice cooker 1 according to an embodiment. FIG. 2 is a perspective view showing the internal structure of the rice cooker 1 of FIG. FIG. 3 is a perspective view showing the essential parts of the rice cooker 1 of FIG. In FIGS. 2 and 3, some of the components of the rice cooker 1 are removed to show the internal structure of the rice cooker 1. FIG. 4 is a plan view of the rice cooker 1 of FIG. 1. FIG. FIG. 5 is a cross-sectional view of the rice cooker 1 viewed in the VV direction of FIG.

A rice cooker 1 includes a bottomed cylindrical pot 2 , a housing 3 that accommodates the pot 2 , an upper frame 4 , a hinge portion 5 arranged above the upper frame 4 , and a lid 6 . The pan 2 can be removed from the housing 3. The housing 3 is provided so as to face the outer peripheral surface of the pot 2 with a gap therebetween. The upper frame 4 is provided so as to cover between the upper opening of the housing 3 and the upper opening of the pan 2 in plan view. The lid body 6 is attached to the hinge portion 5 so as to be rotatable around the hinge portion 5 . Thereby, the lid 6 covers the upper opening of the pot 2 so as to be openable and closable. The hinge part 5 is arranged behind the rice cooker 1 . Since the front side of the lid body 6 is thereby opened, the user can easily access the pot 2 and wash the rice.

As shown in FIG. 5 , the rice cooker 1 further includes a heating unit 8 that heats the pan 2 and a control unit 20 that controls the operation of the entire rice cooker 1 . The heating unit 8 includes, for example, a heating coil, and is an induction heating (IH) type that heats the pot 2 by generating an eddy current in the pot 2 made of metal by a high-frequency magnetic field generated when a high-frequency current is applied to the heating coil. is a heating device.

In this embodiment, the rice cooker 1 is a pressure type rice cooker that cooks rice by pressurizing the inside of the pot 2 . Inside the lid 6, a pressure valve 15 (not shown in FIGS. 1 to 5) is provided to open and close a hole communicating between the inside of the pot 2 and the outside space according to the control of the control unit 20. It is The rice cooker 1 also includes a boiling detection unit 16 (see FIG. 5) that detects that the water in the pot 2 has boiled, and a pressure sensor 17 (see FIGS. 2 and 3) that detects the pressure in the pot 2. Further prepare. Boiling detector 16 is, for example, a steam sensor.

The rice cooker 1 is an automatic feeding type rice cooker that automatically moves rice and water to a pot 2 to cook rice. Therefore, the rice cooker 1 includes a rice container 100 containing rice and a water container 300 containing water in the housing 3 . Furthermore, the rice cooker 1 includes a rice transfer section 110 that transfers rice contained in the rice container 100 to the pot 2 and a water transfer section 310 that transfers water contained in the water container 300 to the pot 2 . Details of the rice feeding unit 110 and the water feeding unit 310 will be described later.

A top portion of the rice container 100 is provided with a rice container opening 101 for supplying or refilling the rice container 100 with rice. The rice container 100 is arranged in front of the rice cooker 1 and the rice container opening 101 is arranged above the rice container 100 . During use, it is assumed that there are walls behind and on the sides of the rice cooker 1 , and that there is a top plate of a storage space for the rice cooker 1 above the rice cooker 1 . Even in such a case, since the rice container opening 101 is located in front, the user can easily put rice into the rice container opening 101 from, for example, a rice bag. In addition, since the rice container 100 is located in front, it is possible to prevent the width of the rice cooker 1 from becoming large, and to prevent deterioration of the installability of the rice cooker 1 when there are objects or walls on the side. .

The rice container 100 further includes a rice container lid 104 configured to open and close the rice container opening 101 . FIG. 6 is a perspective view showing the rice cooker 1 with the rice container lid 104 open. The rice container lid 104 is configured to rotate in the direction opposite to the direction in which the lid body 6 rotates when moving from the closed position to the open position when moving from the closed position to the open position. That is, the rice container lid 104 is provided with a first pivot shaft 105 arranged in front of the rice container opening 101 so as to extend laterally. As a result, the rice container lid 104 moves from the back to the front and opens, without interfering with the lid body 6.例文帳に追加Therefore, in order to be able to open the rice container lid 104 without interfering with the lid 6, it is possible to increase the depth dimension of the rice cooker 1 by, for example, providing the rice container opening 101 further forward. do not have.

The opening and closing operation of the rice container lid 104 will be described in detail with reference to the partial side views of FIGS. 7A and 7B. FIG. 7A shows the rice container lid 104 in the closed position. Figure 7B shows the rice container lid 104 in the open position. As shown in FIG. 7B, rice container lid 104 further comprises second pivot shaft 106 .

If the rice container lid 104 does not have the second pivot shaft 106 and has only the first pivot shaft 105, even if the rice container lid 104 is opened from the closed position in FIG. Since the front end portion 104a and the front end portion 4a of the upper frame 4 are in contact with each other, the rice container lid 104 cannot be opened. Therefore, when the rice container lid 104 moves from the closed position to the open position, the rice container lid 104 is rotated by the second rotating shaft 106 in a direction different from the rotating direction by the first rotating shaft 105 . The second rotating shaft 106 is arranged behind the first rotating shaft 105 when the rice container lid 104 is in the closed position, and rotates about the first rotating shaft 105 together with the rice container lid 104 . move. With this configuration, the front end portion 104a of the rice container lid 104 and the front end portion 4a of the upper frame 4 do not contact each other during the opening operation, and the rice container lid 104 can be opened. Also, with such a two-axis configuration, parts such as an operation board, a flat cable, and a display can be arranged between the rice container lid 104 and the lid base 104b (see FIG. 5) in the vertical direction.

The rear surface of the lid seat 104b of the rice container lid 104 is substantially horizontal when the lid is in the closed position. The lid seat 104b is configured to rotate by an angle θ from the closed position and not rotate further. Angle θ is, for example, greater than 90 degrees and less than 180 degrees. In other words, the rice container lid 104 is pivotable from the closed position until at least a portion of the rice container lid 104 is disposed in the rest position forward and above the first pivot axis 105 in the open position, It is configured to be restable in a rest position. When the angle θ is obtuse, in the open position, the bottom of the lid seat 104b becomes a slope facing the rice container 100, and the rice on the lid seat 104b can be guided into the rice container 100. . Therefore, the user can easily put rice into the rice container 100 from the rice bag. Also, it is possible to prevent the rice from spilling when the rice is supplied to the rice container 100 .

As shown in the figure, when the rice container opening 101 of the rice container 100 is at the top, dew that adheres to the bottom of the pot 2 and the lid 6 during rice cooking, and water vapor that is generated during rice cooking will be trapped inside the rice container 100. There is a risk of entering from the opening 101 of the rice container. If moisture enters the rice container 100, it may cause the rice in the rice container 100 to swell or rot. Therefore, a waterproof wall 9 projecting upward from the rice container opening 101 is provided between the rice container opening 101 of the rice container 100 and the pot 2 in the upper part of the upper frame 4 . The waterproof wall 9 can prevent water from entering the rice container opening 101 of the rice container 100 .

For example, as shown in FIG. 1, a door 103 that can be opened and closed by a hinge is attached to the front surface of the rice container 100 . The door 103 opens forward. FIG. 8 is a perspective view showing rice cooker 1 with door 103 open. As a result, the user can access the rice container 100 by inserting his or her hand into the rice container 100 from the front. Therefore, the inside of the rice container 100 can be cleaned by wiping. The rice container 100 may include an inner lid 107 for closing the front opening of the rice container 100 so that the rice does not spill out of the rice container just by opening the door 103 .

The rice container 100 has an inclined side surface 108 that is inclined so that the width of the rice container 100 is gradually reduced downward when viewed from the front. In this embodiment, only the inclined side surface 108 which is one side surface of the rice container 100 is inclined, and the other side surface 109 opposite to the inclined side surface 108 is not inclined. This configuration is advantageous because it is possible to secure a large space below the inclined side surface 108, and when the water container 300 is arranged in this space as described later, the capacity of the water container 300 can be increased. However, the present disclosure is not limited to this, and both the left and right sides of the rice container may be slanted. Rice supplied into the rice container 100 slides along the inclined side surface 108 and gathers downward.

At least a portion of the water container 300 is positioned below the slanted side 108 of the rice container 100 . As shown in FIG. 5, a water container housing portion 301 for housing a water container 300 is provided below the rice cooker 1 . By disposing the water container 300 below the inclined side surface 108 of the rice container 100 in this manner, the rice cooker 1 can be made compact.

The water container 300 is detachably stored in the water container storage portion 301 . The user can remove the water container 300 by pulling it forward from the water container storage part 301 in order to replenish water. FIG. 9 is a perspective view showing the rice cooker 1 with the water container 300 taken out, showing the overall structure of the water container 300. As shown in FIG. The water container 300 includes a lid 302 that opens and closes a water supply port, and an outlet 303 that is connected to a water supply channel 311 to the pot 2 when attached. Exit 303 is an example of an "opening" in this disclosure. After taking out the water container 300, the user opens the lid 302 and replenishes the water container 300 with water from a tap or the like through a water supply port. When the rice cooker 1 is in use, it is assumed that there are walls behind and to the sides of the rice cooker 1, but the user can easily supply water to the water container 300 by pulling out the water container 300 forward.

As shown in FIG. 5 , the rice cooker 1 has a Peltier unit 400 behind the water container storage portion 301 for cooling the water stored in the water container 300 . FIG. 10 is an exploded perspective view showing the configuration of the Peltier unit 400. As shown in FIG. The Peltier unit 400 includes a Peltier element 401, a heat sink 403, a temperature sensor 405 that detects the temperature of the heat sink 403, a cooling fan 407, a radiator plate 409, a temperature sensor 410 that detects the temperature of the radiator plate 409, and a packing. 411 , a front cover 413 and a rear cover 414 .

The Peltier element 401 is an example of the "cooling device" of the present disclosure. Since the Peltier element 401 is small, the size of the entire rice cooker 1 can be reduced by using the Peltier element 401 as a cooling device. By cooling the water, it is possible to prevent the growth of germs and putrefaction of the water. Also, by cooking the rice with cooled water, the taste of the cooked rice is improved.

The Peltier element 401 has a flat shape extending parallel to the ZX plane, and has a cooling surface 401a on the front (+Y direction) and a heat generating surface on the rear. A heat sink 403 is attached to the heat generating surface of the Peltier element 401 . A temperature sensor 405 is attached to the side of the heat sink 403 . The cooling fan 407 blows air toward the heat sink 403 to cool the heat sink 403 , thereby lowering the temperature of the cooling surface 401 a of the Peltier element 401 . In the illustrated example, the cooling fan 407 is installed below the heat sink 403 .

The radiator plate 409 is attached to the cooling surface 401 a of the Peltier element 401 and transfers the temperature of the cooling surface 401 a to the water container 300 . Therefore, the cooling surface 401 a of the energized Peltier element 401 cools the water in the water container 300 via the heat sink 409 . A cold conducting plate 304 may be arranged around the water container 300 (see FIG. 26). The cold guide plate 304 is made of, for example, a metal with high thermal conductivity. The cold guide plate 304 is in contact with the radiator plate 409 and can efficiently transfer cool air to the water in the water container 300 .

The Peltier element 401 has a configuration in which a PN semiconductor is sandwiched between two ceramic plates, and electrodes provided on the ceramic plates are soldered to the PN semiconductor. When power is supplied to the Peltier element 401, one surface (the aforementioned cooling surface 401a) is cooled and the other surface (the aforementioned heating surface) is heated. A cooled ceramic surface undergoes thermal contraction and a heated ceramic surface undergoes thermal expansion. As a result, stress is generated on the junction surface of the PN semiconductor. Therefore, when energization and non-energization are changed, or the polarity of energization is changed, the expansion and contraction of the ceramic forming the Peltier element 401 change, stress is repeatedly applied to the junction of the PN semiconductor, and solder cracks occur. As a result, there is a problem that the Peltier element 401 is damaged or the cooling capacity is deteriorated.

Therefore, in this embodiment, the number of rotations of the cooling fan 407 is determined in advance by the temperature of the heat sink 403 detected by the temperature sensor 405 and/or the temperature of the radiator plate 409 detected by the temperature sensor 410 by the control unit 20, for example. The temperature is controlled within a specified temperature range. As a result, the temperature change of the ceramic forming the Peltier element 401 can be reduced. Since the ceramic temperature can be stabilized by simple control in this manner, the life of the Peltier element 401 can be extended.

As shown in FIG. 5, the rice cooker 1 further includes a substrate 10 on which a switching transistor for supplying power to the heating unit 8 is mounted, and a heat sink 11 for cooling the switching transistor. The heat sink 11 is arranged above the heat sink 403 . That is, the heat sink 11 is arranged downwind of the air supplied by the cooling fan 407 , and the heat sink 11 and the heat sink 403 are arranged in series in the air flow direction supplied by the cooling fan 407 . Therefore, cooling fan 407 can cool not only heat sink 403 but also heat sink 11 . Therefore, there is no need to further provide a fan for cooling the switching transistor or the substrate 10 on which it is mounted in the rice cooker 1, so that the size reduction can be achieved while ensuring the cooling function.

As shown in FIG. 5 , the rice cooker 1 further includes a heat insulating material 12 . The heat insulating material 12 is arranged between the pot 2 and the heating unit 8 and the water container storage unit 301 and between the pot 2 and the heating unit 8 and the rice container 100 . As a result, the heat insulating material 12 thermally separates the water container housing part 301 and the rice container 100 from the pot 2 and the heating part 8, which become hot during cooking and keeping warm, and is housed in the water container housing part 301. It is possible to prevent the water in the water container 300 and the rice in the rice container 100 from becoming hot. When water and rice become hot, there is a risk of spoilage, multiplication of germs, deterioration of taste, etc., but the heat insulating material 12 can prevent these situations.

As shown in FIG. 5, the heat insulating material 12 is not arranged between the water container storage part 301 and the rice container 100. As shown in FIG. Also, the radiator plate 409 and the water container housing portion 301 are in contact (see FIG. 10), and the water container housing portion 301 and the rice container 100 are adjacent to each other. Therefore, the heat of the radiator plate 409 attached to the cooling surface 401a of the Peltier device 401 is also transferred to the rice container 100 via the water container housing portion 301. FIG. As a result, the radiator plate 409 cooled by the Peltier element 401 not only cools the water in the water container 300, but also cools the rice in the rice container 100 by pre-cooling. Therefore, the rice cooker 1 can cool the rice in the rice container 100, and can prevent rot of the rice, proliferation of germs, deterioration of taste, and the like.

[1-2. Rice Delivery Department]
[1-2-1. Weighing blade and rice transfer blade]
The rice transfer unit 110 includes a rice transfer path 111 for transferring rice from the rice container 100 to the pot 2, and a rice weighing unit 120 for measuring the amount of rice and supplying a specified amount of rice to the rice transfer path 111. and (see FIGS. 2 and 3).

FIG. 11 is an exploded perspective view showing the configuration of the rice weighing unit 120. As shown in FIG. The rice weighing unit 120 includes a weighing blade 121 spirally formed around an axis parallel to the Y axis, and a guide portion 122 covering the outer periphery of the weighing blade 121 . The guide portion 122 has a cylindrical shape with an axis extending in the Y-axis direction. That is, the guide portion 122 has a cylindrical shape formed coaxially with the metering blade 121 and covers the outer circumference of the metering blade 121 .

The rice weighing unit 120 further includes a drive motor 123 that rotates the weighing vane 121 around the Y-axis under the control of the control unit 20 . An input shaft 124 and an output shaft 126 are provided between the metering vane 121 and the drive motor 123 . Input shaft 124 may be rotated by drive motor 123 and transmit the power of drive motor 123 to output shaft 126 . The output shaft 126 is inserted into the metering vane 121 so as to be slidable in the Y direction with respect to the metering vane 121 . The output shaft 126 can be rotated by the input shaft 124 to transmit the power of the drive motor 123 to the metering vanes 121 .

The input shaft 124 has a meshing portion 125 having a spur gear shape when viewed in the Y direction, and the output shaft 126 has a meshing portion 127 having an internal gear shape when viewed in the Y direction. The input shaft 124 is mounted slidably in the Y direction relative to the output shaft 126 . By pushing the input shaft 124 in the Y direction with respect to the output shaft 126 , the meshing portion 125 of the input shaft 124 meshes with the meshing portion 127 of the output shaft 126 . When the meshing portion 125 and the meshing portion 127 are meshed, the input shaft 124 can transmit the power of the drive motor 123 to the output shaft 126 . When the meshing portion 125 and the meshing portion 127 are not meshed, the input shaft 124 cannot transmit the power of the drive motor 123 to the output shaft 126 . Thus, the meshing portion 125 of the input shaft 124 and the meshing portion 127 of the output shaft 126 constitute a clutch mechanism 128 .

The rice weighing unit 120 includes a rice feeding path entrance 129 connected to the rice feeding path 111, a rice feeding path lid 130 configured to open and close the rice path from the weighing vane 121 to the rice feeding path entrance 129, and a packing. 131. The rice feeding path lid 130 and the packing 131 are attached around the weighing blade 121 coaxially with the weighing blade 121 .

The rice weighing unit 120 covers the guide unit 122, and includes a fixed base 132 for fixing the drive motor 123, a spring 133 for biasing the output shaft 126 in the +Y direction, and a rice feeding path lid 130 for the +Y direction. and a biasing spring 134 . Springs 133 and 134 are, for example, compression coil springs.

FIG. 12 is a cross-sectional view showing the state of the rice weighing unit 120 during rice feeding. 13 is an enlarged view of a portion of the cross-sectional view of FIG. 12. FIG. The rice cooker 1 further comprises a rice transfer vane 148 which is spirally formed around the axis and rotates around the axis in the supply direction to transfer the rice to the weighing vane 121 . Rice transfer vane 148 is an example of the "rice transfer section" of the present disclosure. The rice transfer vane 148 is concentric with the weighing vane 121 and connected in series with the weighing vane 121 . That is, the rice transfer blade 148 is connected to the metering blade 121 so that its axial direction coincides with the axial direction of the metering blade 121 . Also, the tip 126a of the output shaft 126 is fitted into a recess 148a provided at one end of the rice transfer blade 148. As shown in FIG. The distal end portion 126a of the output shaft 126 has a portion where the distance between the shaft and the surface of the distal end portion 126a in the direction perpendicular to the shaft is large and a portion where the distance is small. For example, the cross section in the direction perpendicular to the axis of the distal end portion 126a of the output shaft 126 has a polygonal shape. Thereby, the rice transfer vane 148 can be rotated by rotating the metering vane 121 in the supply direction.

Since the rice transfer blade 148 and the metering blade 121 are concentrically connected in series, the rice transfer blade 148 and the metering blade 121 can be driven by one drive motor 123 . Therefore, the drive motor 123 is shared, the configuration is simplified, and the size of the rice cooker 1 can be reduced.

A bearing 149 is attached to the other end of the rice transfer blade 148, and the bearing 149 is placed in contact with a bearing portion 100b provided on the front inner wall 100a of the rice container 100 (see FIG. 26). The rice transferring blade 148 is rotated by the rotation of the measuring blade 121 in the supply direction by the driving motor 123, and transfers the rice in the rice container 100 to the measuring blade 121 (in the -Y direction). By the rice transfer blade 148, the rice in front of the rice container 100 can be transferred to the weighing blade 121 without providing the bottom surface of the rice container 100 with a slope for the rice to slide down to the rear weighing blade 121.例文帳に追加Therefore, it is possible to increase the capacity of the rice container 100 and prevent rice from remaining in the rice container 100 .

The rice transfer blades 148 are made of an elastic material such as rubber, for example, so that the rice can be prevented from being caught between the rice transfer blades 148 and the inner wall of the rice container 100 . Therefore, it is possible to prevent a defective rice transfer operation and a failure of the driving motor 123 caused by rice being caught.

The weighing vane 121 can transfer the rice in the axial direction (+Y direction) by rotating about the axis in the feeding direction. During the rice feeding shown in FIG. 13, the rice feeding path lid 130 is displaced to the rearmost position, and the surface in the -Y direction is in contact with the seat surface 121a of the weighing blade 121. As shown in FIG. Along with this, the packing 131 is also displaced rearmost. As a result, the path of rice from the weighing vane 121 to the entrance 129 of the rice feeding path is opened, as indicated by the arrow in FIG. Therefore, the rice transferred by the weighing vane 121 is supplied to the rice feeding path 111 through the rice feeding path inlet 129 .

In this way, the weighing vane 121 can weigh the rice while moving (pushing) the rice in the horizontal direction. As a method of weighing the rice, a method of weighing the rice by time, for example, while dropping the rice from the rice container by the action of gravity can be considered. However, this method requires a space for weighing in the height (vertical) direction, which poses a problem of increasing the size of the entire rice cooker. For example, if a space for such weighing is provided in the lid above the pot, the lid becomes large and heavy, and the opening and closing mechanism of the lid is inevitably complicated. However, the size of the rice cooker is further increased. Since the rice cooker 1 according to the present embodiment can weigh the rice while moving it in the horizontal direction using the weighing blades 121, there is no need to provide a space for weighing above the pan. Therefore, the rice container 100 can be provided in the housing 3, and the size reduction of the rice cooker 1 can be achieved. Note that although the rice is moved horizontally in the present embodiment, the present disclosure is not limited to this. For example, it is possible to move the rice obliquely by the weighing vane 121 .

When the rice transfer blade 148 is attached to the output shaft 126 (the state shown in FIGS. 12 to 14), the rice transfer blade 148 is in contact with the bearing portion 100b of the rice container 100 via the bearing 149. FIG. The axial dimensions of rice transfer vane 148, bearing 149, and output shaft 126 are configured such that rice transfer vane 148 pushes output shaft 126 against input shaft 124 in the installed state. Accordingly, in the connected state, the meshing portion 125 of the input shaft 124 meshes with the meshing portion 127 of the output shaft 126 , and the power of the drive motor 123 is transmitted to the input shaft 124 via the output shaft 126 . When the rice transfer blade 148 is attached to the output shaft 126 in this manner, the clutch mechanism 128 is in a connected state capable of transmitting power.

In the attached state where the rice transfer blade 148 is attached to the output shaft 126, the spring 133 is elastically deformed and urges the output shaft 126 in the +Y direction with respect to the rice transfer blade 148 with reference to the fixed base 132. there is The output shaft 126 is biased in the +Y direction, but since the tip of the rice transfer blade 148 connected to the output shaft 126 is fixed to the bearing portion 100b of the rice container 100 via the bearing 149, the +Y direction do not slide into Therefore, the connected state of the clutch mechanism 128 is maintained.

The rice weighing unit 120 has a rotation speed sensor 141 that detects the rotation speed of the weighing vane 121 . The rotation speed sensor 141 is an example of the “rotation speed detection unit” of the present disclosure. The amount of rice supplied from the measuring blade 121 to the rice feeding path 111 via the rice feeding path entrance 129 can be calculated if the rotation speed of the measuring blade 121 can be detected. For example, the amount of rice supplied to the rice feeding path 111 when the weighing vane 121 rotates once is fixed. Therefore, by detecting the rotation speed of the measuring blade 121 by the rotation speed sensor 141, a desired amount of rice can be transferred from the rice container 100 to the pan 2 with high accuracy. Further, by covering the outer periphery of the weighing blade 121 with the guide portion 122 as described above, the amount of rice transferred with the rotation of the weighing blade 121 is stabilized, and the weighing accuracy is improved.

In the example shown in FIGS. 13 and 14, the rotation speed sensor 141, which is an example of the rotation speed detection unit, is attached to the metering vane 121, but the present disclosure is not limited to this. For example, speed sensor 141 may be attached to output shaft 126 , input shaft 124 , or drive motor 123 . Alternatively, a stepping motor may be used as the drive motor 123, and the controller 20 may measure the number of rotation pulses of the stepping motor to measure the number of rotations of the drive motor 123, that is, the number of rotations of the weighing blade 121. . Further, for example, the control unit 20 may calculate the amount of rice transferred with the rotation of the weighing vane 121 by measuring the rotation time instead of the number of rotations.

FIG. 14 is a cross-sectional view showing the state of the rice weighing unit 120 when rice is not fed. After the rice feeding in the state of FIG. 13 is completed, the driving motor 123 rotates in the rice discharging direction opposite to the feeding direction, and the measuring blade 121 also rotates in the rice discharging direction accordingly. As a result, the weighing vane 121 discharges the rice on the weighing vane 121 into the rice container 100 after the rice feeding is completed. Unlike this, if rice remains on the weighing blade 121 after the rice feeding is completed, there is a problem that the remaining rice causes a measurement error in the next rice feeding, but the rice cooker according to the embodiment of the present disclosure 1 can solve this problem and measure rice with good accuracy.

When the driving motor 123 rotates the measuring blade 121 in the rice discharge direction as described above, the rice feeding passage cover 130 rotates relative to the measuring blade 121 and is displaced forward (+Y direction). As a result, the rice feeding path lid 130 and the packing 131 close the rice path from the weighing vane 121 to the rice feeding path inlet 129 . As a result, it is possible to prevent foreign matter and pests from passing through the entrance 129 of the rice feeding route. For example, pests in the rice container 100 can be prevented from reaching the pot 2 through the rice feeding channel entrance 129 and the rice feeding channel 111 . It is also possible to prevent hot air from the pot 2 from entering the rice container 100 and cold air from the rice container 100 to escape through the rice feeding channel entrance 129 and the rice feeding channel 111 .

FIG. 15 is a cross-sectional view showing the rice weighing unit 120 in an unattached state with the rice transfer vane 148 removed from the output shaft 126. As shown in FIG. The rice transfer vane 148 is detachably connected to the weighing vane 121 . Specifically, the rice transfer vane 148 is detachably connected to the output shaft 126 . This allows the removed rice transfer blade 148 to be washed. Also, the inside of the rice container 100 can be cleaned with the rice transfer blade 148 removed. Since the rice transfer blade 148 is detachable in this manner, the ease of maintenance is improved, and the rice cooker 1 can be kept hygienic.

14, in FIG. 15 the output shaft 126 has moved forward relative to the input shaft 124, thereby disengaging the meshing portion 125 of the input shaft 124 and the meshing portion 127 of the output shaft 126. . Thus, when the rice transfer blade 148 is removed from the output shaft 126, the clutch mechanism 128 is in a disengaged state in which it does not transmit power.

When the rice transfer blade 148 is pulled forward from the attached state shown in FIG. 14, the output shaft 126 is moved forward together with the rice transfer blade 148 . When the rice transfer vane 148 is pulled further forward, the output shaft 126 contacts the metering vane 121 in the Y direction and the output shaft 126 cannot move forward any more. When the rice transfer blade 148 is further pulled forward, the engagement between the concave portion 148a of the rice transfer blade 148 and the tip portion 126a of the output shaft 126 is released, and the rice transfer blade 148 can be removed from the output shaft 126. Thus, the rice transfer vane 148 is in the unattached condition, detached from the output shaft 126 in FIG. 15, and the clutch mechanism 128 is in the disengaged condition in FIG.

In the non-attached state where the rice transfer blade 148 is removed from the output shaft 126 in FIG. Output shaft 126 moves rearward. As a result, the rice transfer vane 148 is in the attached state attached to the output shaft 126, and the clutch mechanism 128 is in the connected state of FIG.

Assuming that the clutch mechanism 128 is in the connected state even though the rice transfer blade 148 is detached from the output shaft 126 and the rice transfer blade 148 is not attached to the output shaft 126, the weighing is performed as if there is no rice on the weighing blade 121. This could result in a situation where the weighing is performed with low accuracy. In this embodiment, since the clutch mechanism 128 is in the disengaged state when the weighing vane 121 is removed from the output shaft 126, the weighing vane 121 does not rotate, and therefore the rice is not weighed according to the rotation. . Therefore, in the non-attached state, the weighing of rice and the transfer of rice to the pan 2 are not performed, and the above situation can be prevented.

The rice weighing unit 120 may further include a rice transfer blade detection unit that detects whether the rice transfer blade 148 is attached to the output shaft 126 or not. The rice transfer blade detection unit is, for example, a current detection device that detects the amount of current flowing through the drive motor 123 . When the rice transfer vane 148 is not attached to the output shaft 126, only the input shaft 124 is driven by the drive motor 123, so the load applied to the drive motor 123 is small. Therefore, the amount of current flowing through the drive motor 123 is also small. Therefore, for example, when the amount of current detected by the current detection device is less than a predetermined threshold value, the control unit 20 determines that the rice transfer blade 148 is not attached to the output shaft 126 . When determining that it is not in the attached state, the control unit 20 notifies the user via the output unit 23 . As a result, the user can know that the rice transfer blade 148 is not attached, and can attach the rice transfer blade 148 and instruct the execution of rice cooking again. The output unit 23 includes, for example, a display unit 31 such as a display of the rice cooker 1 and a notification device such as a speaker 32 that outputs voice. The control unit 20 may notify the user's terminal such as a smartphone via the communication interface 25 instead of the output unit 23 .

[1-2-2. Rice separator]
As shown in FIGS. 2 and 3 , the rice feeding path 111 extends from the rice feeding path entrance 129 to the top of the pot 2 . The rice feeding section 110 further includes a rice separation device 150 at the most downstream side of the rice feeding path 111 . In addition, the rice feeding section 110 has an exhaust pipe 113 fluidly connected to the rice feeding path 111 via the rice separator 150, and causes the air in the rice feeding path 111 to flow, thereby allowing the rice to flow through the rice feeding path. A rice feeding fan 112 for moving from the inlet 129 to the pot 2 is further provided.

The rice separator 150 is arranged inside the lid 6 . Although the present disclosure is not limited to this, if the rice separator 150 is arranged in the lid 6, the width of the rice cooker 1 can be prevented from increasing, and the rice cooker 1 can be It is possible to prevent the deterioration of the installability of the

The rice feeding fan 112 is attached, for example, to the end of the exhaust pipe 113 different from the pot 2 side, and draws in air from the exhaust pipe 113, the rice separating device 150, and the rice feeding passage 111, thereby cooling the inside of the rice feeding passage 111. It is an intake fan that moves air. As a result, heat generated by the operation of the rice feeding fan 112 or the like does not enter the rice feeding path 111, so that heat damage to the rice during rice feeding can be reduced. In addition, it is possible to prevent the rice from flowing back into the rice container 100 by the configuration in which the suction fan is used to move the rice using the negative pressure.

16 is a plan view of the rice separator 150. FIG. The rice separator 150 has a cylindrical main body 153 whose central axis is parallel to the Y axis, an intake port 151 for taking in the rice and air moved by the rice feeding fan 112, an exhaust port 152 for discharging the air, A rice discharge port 154 for discharging rice is provided. The intake port 151 is connected to the rice feeding path 111 . The exhaust port 152 is connected to the exhaust pipe 113 . In FIG. 16, portions other than the rice separating device 150, such as the rice feeding path 111 and the exhaust pipe 113, are omitted. In FIG. 16, double arrows indicate the directions in which the air travels during the feeding of rice.

FIG. 17 is a cross-sectional view of the rice separator 150 viewed in the XVII-XVII direction of FIG. FIG. 18 is a cross-sectional view of the rice separator 150 viewed in the XVIII-XVIII direction of FIG. In FIG. 17, double arrows indicate the direction in which the air and the rice travel during the feeding of the rice. The rice separator 150 separates the rice and air taken in from the air inlet 151 by using the fluidity of the air taken in from the air inlet 151, discharges the rice only from the rice discharge outlet 154, and discharges the air from the air outlet 152. Eject only. No rice is discharged from the exhaust port 152 . Rice discharged from the rice discharge port 154 is supplied to the pot 2 .

Specifically, the rice separator 150 separates rice and air through a cyclone configuration. That is, as shown in FIG. 17, the intake port 151 has a path of rice and air perpendicular to the central axis of the main body 153, and the rice and air flow into the cylindrical wall surface of the main body 153 rather than near the central axis. is configured as In other words, the inlet 151 is configured such that the rice and air enter along a tangent to the inner surface of the cylindrical wall of the body 153 . The exhaust port 152 is provided in the central portion of the main body 153 in the cross-sectional view of FIG. 17 . The rice discharge port 154 is provided at the bottom of the main body 153 .

With this configuration, the rice and air entering from the inlet swirl into the inner surface of the main body 153 . As a result, a relatively large centrifugal force is applied to the rice, which has a higher specific gravity than air, and the rice is pressed against the inner surface of the main body 153 . Therefore, the rice advances along the wall surface of the main body 153, reaches the rice discharge port 154, is discharged from the rice discharge port 154, and enters the pot 2. - 特許庁Air is discharged from the exhaust port 152 . Rice does not pass through the exhaust port 152 .

Means for separating rice and air include a filter method using a filter. However, in the filter method, the filter is installed in the lid 6 of the rice cooker 1 or the like, and it is difficult to replace and clean the filter. Therefore, there is a problem that rice cannot be fed when the filter is clogged after long-term use. On the other hand, according to the rice separator 150 of the present embodiment, which separates rice and air without using a filter, clogging of the filter does not occur, and rice can be fed stably over a long period of time. can be done.

[1-2-3. Rice feeding lid opening and closing device]
After the rice feeding to the pot 2 is completed, the rice discharge port 154 of the rice separator 150 is closed by the rice feeding lid 201 (see FIG. 18). The rice feeding lid 201 is driven by the rice feeding lid opening/closing device 200 . The operation of the rice feeding lid opening/closing device 200 is controlled by the controller 20, for example.

FIG. 19 is a perspective view showing the configuration of the rice feeding lid opening/closing device 200. As shown in FIG. FIG. 20 is an exploded perspective view of the rice feeding lid opening/closing device 200. FIG. The rice feeding lid opening/closing device 200 includes a fixing base 202 attached to the lid body 6 , a packing 203 attached to the fixing base 202 , and a rice feeding lid 201 for opening and closing the rice discharge port 154 of the rice separator 150 . The rice feeding lid opening/closing device 200 includes a motor 210 for driving the rice feeding lid 201, a rotating body 212 having a spur gear 211 and a gear 212a, a rotating body seat 213 having a rack gear 213a extending in the vertical direction, A rotary shaft 214 having a gear 214a is further provided. The rice feeding lid opening/closing device 200 further includes a motor fixing base 204 for fixing the motor 210 and a rotating body seat 205 for supporting the rotating body 212 . The motor fixing base 204 is arranged inside the lid body 6 .

A spur gear 211 is attached to the motor 210 . The spur gear 211 meshes with the rack gear 213a to move the rotating body seat 213 up and down. When the rotating body seat 213 moves up and down, the rotating body 212 also moves up and down accordingly. The rice feeding lid opening/closing device 200 has a link mechanism that converts the vertical motion of the rotating body 212 into rotational motion of the rotating body 212 about the vertical axis.

21 is a plan view of the rotating body 212. FIG. The rotating body 212 has a ring-like shape that is a bottomless cylinder. The rotating body 212 has a spur gear-like gear 212a on a part of its outer periphery, and has a link pin 212b protruding inwardly in the direction of the cylindrical axis on its inner peripheral surface.

As shown in FIG. 20, motor fixing base 204 has link 220 and fixing base 202 has link 221 . As shown in FIG. 19, a gap 222 is formed between the link 220 and the link 221 at the time of assembly, which spirals around the vertical axis. The link pin 212b of the rotating body 212 is fitted into this gap 222 during assembly. The link pin 212b of the rotating body 212 can slide in the gap 222 along the extending direction of the gap 222 extending spirally.

As shown in FIG. 19, the gear 212a of the rotating body 212 meshes with the gear 214a of the rotating shaft 214. As shown in FIG. The rice feeding lid 201 is attached to the tip of the rotating shaft 214 .

Next, the operation of the rice feeding lid opening/closing device 200 will be described. FIG. 22 is a sectional view showing the rice feeding lid opening/closing device 200 in a closed state in which the rice discharge port 154 of the rice separating device 150 is closed by the rice feeding lid 201. FIG. FIG. 23 is a cross-sectional view showing the rice feeding lid opening/closing device 200 in an open state with the rice discharge port 154 opened.

When the motor 210 is operated in the opening direction in the closed state of FIG. 22, the spur gear 211 rotates in the opening direction. As a result, the rack gear 213a meshing with the spur gear 211 moves downward, and the rotating body seat 213 moves downward. As the rotating body seat 213 moves, the rotating body 212 moves downward, the link pin 212b of the rotating body 212 slides in the spiral gap 222 between the link 220 and the link 221, and the rotating body 212 moves downward. Rotate. Since the gear 212a of the rotating body 212 and the gear 214a of the rotating shaft 214 are engaged with each other, when the rotating body 212 rotates, the rotating shaft 214 rotates. When the rotating shaft 214 rotates, the rice feeding lid 201 attached to the tip of the rotating shaft 214 also rotates around the rotating shaft 214 .

In this manner, the rice feeding lid 201 moves downward as the rotating body seat 213 moves downward, and rotates as the rotating shaft 214 rotates. As a result, the rice discharge port 154 is opened to be in the open state shown in FIG. The movement from the open state of FIG. 23 to the closed state of FIG. 22 can be realized by rotating the motor 210 in the closing direction opposite to the opening direction.

The rice feeding lid opening/closing device 200 closes the rice discharge port 154 of the rice separating device 150 with the rice feeding lid 201 when the rice is cooked, for example, after the rice feeding is completed. This can prevent steam from leaking from the rice discharge port 154 . Therefore, it is possible to prevent the steam from entering the rice container 100 through the rice feeding path 111, causing the rice to rot, and to prevent the pressure inside the pot 2 from decreasing during rice cooking.

When feeding rice to the pot 2, the rice feeding lid opening/closing device 200 moves the rice feeding lid 201 as shown in FIG. This allows the rice to enter the pot 2 through the rice discharge port 154 . If the rice feeding lid 201 is simply moved downward during rice feeding, there is a risk that the rice will get on the upper surface of the rice feeding lid 201 . If rice is on the upper surface of the rice feeding lid 201, the rice enters between the rice feeding lid 201 and the packing 203, and the rice feeding lid 201 cannot be closed, resulting in steam leakage. Therefore, the rice feeding lid opening/closing device 200 of the present embodiment not only moves the rice feeding lid 201 downward when moving from the closed state to the open state, but also rotates the rice feeding lid 201 around the rotating shaft 214 as described above. remove the rice feed lid 201 from the rice path. As a result, it is possible to prevent the rice from getting on the upper surface of the rice feeding lid 201. - 特許庁Therefore, it is possible to prevent rice from entering between the rice feeding lid 201 and the packing 203 when the rice feeding lid 201 is closed, thereby preventing steam from leaking.

[1-2-4. Storage rice amount sensor]
As shown in FIG. 2 , the rice cooker 1 further includes a stored rice amount sensor 230 that detects the amount of stored rice in the rice container 100 . For example, the stored rice amount sensor 230 detects whether or not there is rice up to a predetermined height in the rice container 100 . In the example shown in FIG. 2, the rice storage sensor 230 is a capacitive sensor such as an electrostatic touch sensor attached to the outer surface of the rice container 100 . The stored rice amount sensor 230 may include a plurality of sensors arranged vertically. In this case, each of the plurality of sensors detects whether or not there is rice in the horizontal direction of itself. In this case, the amount of rice in the rice container 100 can be measured more accurately than when there is only one sensor.

The stored rice amount sensor 230 is not limited to the capacitance type sensor described above, and may be, for example, a weight sensor, a mechanical switch type sensor provided in the rice container 100, an infrared sensor, or the like. However, the capacitive sensor can be affixed to the outer surface of the rice container 100 and the sensor will not fall off inside the rice container 100 . In addition, when an infrared sensor is used, the detection accuracy is degraded by rice flour or the like, but when the capacitance type sensor is used, rice flour or the like does not degrade the detection accuracy. Therefore, by using the capacitive sensor, the amount of stored rice can be stably and accurately detected.

[1-3. Water supply section]
As shown in FIG. 3, the water supply unit 310 includes a water supply path 311 for transferring water from the water container 300 to the pot 2, a water supply pump 312 for moving the water, and a water level sensor for detecting the water level in the water container 300. 313. The water pump 312 is an example of the "water supply device" of the present disclosure. The water pump 312 is, for example, a gear pump, a tubing pump, or the like that can control the direction of water supply. By using the water pump 312, water can be fed with a simple configuration. Also, the use of the water pump 312 increases the degree of freedom in designing the water channel 311 .

24 is a cross-sectional view showing a cross section parallel to the YZ plane through the outlet 303 (see FIG. 9) of the water container 300. FIG. In the cross-sectional view of FIG. 24, portions other than the periphery of the outlet 303 of the water container 300 are omitted. FIG. 25 is an exploded perspective view showing the structure of the water level sensor 313. As shown in FIG.

The upstream of the water channel 311 is connected to the water channel inlet 315 . A forwardly projecting valve plunger 307 is provided at the water supply channel inlet 315 . A ball valve 305 is provided at the outlet 303 of the water container 300 . The ball valve 305 is biased by a spring 306 to close the outlet 303 of the water container 300 when the water container 300 is removed from the water container storage portion 301 . Thereby, water does not leak from the water container 300 . On the other hand, when the water container 300 is set in the water container housing portion 301, the valve plunger 307 pushes the ball valve 305 forward to move it, so that the outlet 303 of the water container 300 is opened. As a result, the outlet 303 of the water container 300 and the water channel inlet 315 are in fluid communication, and the water in the water container 300 can flow into the water channel 311 . The ball valve 305 is an example of the "on-off valve" of the present disclosure.

In this embodiment, the water level sensor 313 is attached above the water supply channel inlet 315 via a packing 314 . Water level sensor 313 is, for example, a pressure sensor that measures the pressure in water channel 311 . Such a water level sensor 313 detects, for example, the pressure corresponding to the difference between the water level in the water channel 311 and the water level in the water container 300 .

The water level sensor of the present disclosure is not limited to the pressure sensor described above, and may be, for example, a capacitive sensor, an ultrasonic sensor, a radio wave sensor, or the like.

FIG. 26 is an exploded perspective view showing the configuration around the water container housing portion 301. As shown in FIG. FIG. 26 also shows the configuration of the Peltier unit 400, the rice weighing unit 120, the rice transfer blade 148, and the like.

[1-4. control unit]
The rice cooker 1 is an automatic rice cooker that automatically moves rice and water to the pot 2 to cook rice under the control of the control unit 20 . FIG. 27 is a block diagram illustrating the hardware configuration of such a rice cooker 1. As shown in FIG. Rice cooker 1 includes control unit 20 , storage unit 21 , input unit 22 , output unit 23 , and communication interface (I/F) 25 .

The control unit 20 controls the overall operation of the rice cooker 1 . The storage unit 21 is a recording medium for recording various information including programs and data necessary for realizing the functions of the rice cooker 1 .

The controller 20 can be implemented in various ways. For example, as the control unit 20, a processor that implements a predetermined function in cooperation with software may be used. If a processor is used as the control unit 20, the control unit 20 can execute various processes by reading programs from the storage unit 21 storing the programs and executing the programs. Since the contents of processing can be changed by changing the program stored in the storage unit 21, the degree of freedom in changing the contents of control can be increased. The processor includes, for example, a CPU (Central Processing Unit) and an MPU (Micro-Processing Unit). Alternatively, a wired logic whose program cannot be rewritten may be used as the control unit 20 . Using wired logic as the control unit 20 is effective in improving the processing speed. Wired logic includes, for example, ASIC (Application Specific Integrated Circuit). Also, the control unit 20 may be realized by combining a processor and wired logic. If the control unit 20 is realized by combining a processor and wired logic, the processing speed can be improved while increasing the degree of freedom in software design. Also, the control unit 20 and a circuit having a function different from that of the control unit 20 may be configured by one semiconductor element. Circuits having other functions include, for example, A/D/D/A conversion circuits. Further, the control unit 20 may be composed of one semiconductor element, or may be composed of a plurality of semiconductor elements. When configured with a plurality of semiconductor elements, each control described in the claims may be realized by different semiconductor elements. Furthermore, the control section 20 may be configured with a configuration including a semiconductor element and a passive component such as a resistor or a capacitor.

The storage unit 21 is realized by, for example, a semiconductor memory device such as a flash memory, an SSD (Solid State Drive), a magnetic storage device such as a hard disk, or another storage device alone or by appropriately combining them. The storage unit 21 may include a volatile memory such as SRAM and DRAM capable of high-speed operation that temporarily stores various information.

The communication interface 25 may be any interface that enables communication between the rice cooker 1 and an external device. Communication interface 25 can be implemented in a variety of ways. For example, the communication interface 25 may be connected to the external device by wire, or may be connected to the external device by radio. The communication interface 25 that connects the device of the present disclosure and an external device by wire is effective in terms of communication security and communication stability. The wired communication interface 25 may be, for example, a wired LAN based on the Ethernet (Ethernet: registered trademark) standard, or a wired connection using an optical fiber cable. The communication interface 25 for wireless connection includes wireless connection with an external device via a base station or the like, or direct wireless connection with an external device. Examples of wireless connections with external devices via base stations include wireless LANs compatible with IEEE802.11 that wirelessly communicate with WiFi (registered trademark) routers, third-generation mobile communication systems (commonly known as 3G), There are a 4th generation mobile communication system (commonly known as 4G), a 5th generation mobile communication system (commonly known as 5G), WiMax (registered trademark) compatible with IEEE 802.16, or LPWA (Low Power Wide Area). By using the communication interface 25 that directly wirelessly connects the device of the present disclosure and an external device, it is effective in improving the security of communication, and even in a place where there is no relay device such as a WiFi (Wi-Fi: registered trademark) router, A device of the present disclosure can communicate with an external device. As the communication interface 25 for directly wirelessly connecting the device of the present disclosure and an external device, for example, communication by Bluetooth (Bluetooth: registered trademark), communication by NFC (Near Field Communication) via a loop antenna, infrared communication, etc. There is

The input unit 22 is an input interface that receives signals from the rice cooker 1 or an external device. The input unit 22 includes, for example, the boiling detection unit 16 described above, the pressure sensor 17 that detects the pressure in the pot 2, the rotation speed sensor 141 that detects the rotation speed of the weighing blade 121, the stored rice amount sensor 230, It includes a water level sensor 313 , a temperature sensor 405 that detects the temperature of the heat sink 403 , and a temperature sensor 410 that detects the temperature of the radiator plate 409 . The input unit 22 may include a user interface (UI) 40 such as a button and a touch panel for receiving input from the user. For example, the user operates the user interface 40 to set the amount of rice to be cooked, the cooking method, the time to finish cooking, and the like.

The user interface 40 is used by the user to input information to the rice cooker 1 . Various embodiments of the user interface 40 are conceivable. For example, the user interface 40 may be composed of mechanical operating members. Further, the user interface 40 may be configured by a transparent plate-shaped operation member installed above the display. Such a transparent plate-like operation member can be of a contact type or a non-contact type. Alternatively, the user interface 40 may be formed by photographing a user's action using a camera and recognizing the action by the rice cooker 1 . Further, the user interface 40 may be provided by the rice cooker 1 receiving a sound emitted by the user. A smart speaker or the like corresponds to such a configuration.

Various embodiments are conceivable as to where the user interface 40 is provided. The user interface 40 may be provided in the rice cooker 1 or may be provided separately from the rice cooker 1 . When the user interface 40 is provided separately from the rice cooker 1, communication between the user interface 40 and the rice cooker 1 is enabled by wire or wireless. In this case, the user interface 40 and the rice cooker 1 may be directly communicable, or may be indirectly communicable via the Internet or an access point. In the case of wireless communication, the communication may be performed using a mobile communication system, or may be performed in compliance with other standards. Furthermore, when communicating wirelessly, remote wireless communication may be used, or close proximity wireless communication may be used.

The control section 20 controls the operation of the output section 23 . The output unit 23 includes, for example, the heating unit 8 described above, a switching transistor for supplying power to the heating unit 8, a pressure valve 15, a display unit 31, a speaker 32, a rice feeding fan 112, and a water feeding pump. 312 , a Peltier element 401 and a cooling fan 407 .

[2. motion]
FIG. 28 is a flow chart showing an example of the operation of the rice cooker 1 according to the embodiment of the present disclosure. The rice cooker 1 is an automatic rice cooker that feeds rice in the rice container 100 and water in the water container 300 in accordance with a user's instruction to cook rice received via the user interface 40 or the communication interface 25. is moved to the pot 2, and the heating part 8 is operated to cook rice. Specifically, the operations of the rice cooker 1 include step S1 for receiving the rice cooking instruction as described above, rice feeding step S2, water feeding step S3, pre-cooking step S4, cooking-up step S5, and stirring step S6. , a boiling maintaining step S7, and a steaming step S8. In parallel with these steps, the rice cooker 1 executes the stored rice amount detection step S9 according to the detection result of the stored rice amount sensor 230 . Each step of operation of the rice cooker 1 will be described in detail below.

[2-1. Stored Rice Amount Detection Process]
FIG. 29 is a flow chart showing the flow of the stored rice amount detection step S9 of FIG. The stored rice amount detection step S9 is periodically performed by the control unit 20 . Alternatively, the stored rice amount detection step S9 may be executed when the stored rice amount sensor 230 detects that the stored rice amount M in the rice container 100 is equal to or less than the predetermined amount M0.

First, the control unit 20 acquires a detection result as to whether or not the amount of stored rice M in the rice container 100 is greater than the predetermined amount M0 from the stored rice amount sensor 230 (S91). When it is determined that the stored rice amount M is equal to or less than the predetermined amount M0 (No in step S92), when the stored rice amount M is not reset in step S24 described later (No in step S93), The control unit 20 sets the stored rice amount M to M0, and stores it in the storage unit 21 (S94).

If the amount of stored rice M is greater than the predetermined amount M0 (Yes in step S92), the controller 20 ends the stored rice amount detection step S9. If it is determined in step S93 that the stored rice amount M has been reset, the stored rice amount detection step S9 also ends. Note that the order of steps S92 and S93 may be reversed.

[2-2. Rice sending process]
FIG. 30 is a flow chart showing the flow of the rice transfer step S2 of FIG. The control unit 20 determines the amount m of rice required for rice cooking according to the rice cooking instruction (step S1 in FIG. 28) (S21). The amount of rice to be cooked is specified, for example, by the user specifying the volume of rice (g, ml, cm ³ , etc.), the weight of rice (g), the number of servings, and the like. For example, the user inputs the amount of rice to be cooked using the UI 40 such as a button provided on the top of the lid 6 or the rice container lid 104 . Alternatively, the user may operate a terminal such as a smartphone to transmit the rice cooking amount to the control unit 20 of the rice cooker 1 via the communication interface 25 .

Next, the control unit 20 determines whether or not the stored rice amount M is greater than a predetermined amount M0 (S22). Since this step S22 is substantially the same as step S92 in FIG. 29, the control unit 20 may actually use the result of step S92 in step S22.

When it is determined in step S22 that the stored rice amount M is equal to or less than the predetermined amount M0 (No in step S22), the control unit 20 determines that the stored rice amount M is the required amount of rice determined in step S21. It is determined whether or not it is less than m (S23).

When it is determined that the amount of stored rice M is equal to or greater than the required amount of rice m (No in step S23), the controller 20 resets the amount of stored rice M (S24). Specifically, the control unit 20 updates the stored rice amount M to Mm, and stores the update result in the storage unit 21 . Thereby, the control unit 20 can always grasp the amount M of stored rice.

If the stored rice amount sensor 230 includes a plurality of vertically aligned sensors, the controller 20 may reset the stored rice amount M using the detection results of each sensor. For example, the stored rice amount sensor 230 includes k sensors arranged in the vertical direction, and each sensor detects that the stored rice amount M in the rice container 100 is greater than a predetermined amount (M1, M2, . . . , Mk). detect whether or not Here, M1>M2> . . . >Mk. When the control unit 20 determines that the stored rice amount M is equal to or less than M1 and determines that the stored rice amount M is equal to or greater than the required amount m of rice, the control unit 20 updates the stored rice amount M to M1-m. However, when it is detected that the stored rice amount M is equal to or less than M2, the control unit 20 gives priority to this result and updates the stored rice amount M to M2-m. The same applies to detection results of other sensors that detect whether or not the amount of stored rice M in the rice container 100 is greater than a predetermined amount (M3, M4, . . . , Mk). Note that the control unit 20 may be able to calculate the stored rice amount M with higher accuracy. For example, in the process of weighing the rice in step S26 of FIG. 30, the control unit 20 may detect the amount m1 of rice fed when the stored rice amount sensor 230 reaches Mk. As a result, the control unit 20 can calculate m−m1 as the amount of rice to be further fed after the stored rice amount sensor 230 reaches Mk. Then, the control unit 20 can calculate that the amount of rice stored in the rice container 100 becomes Mk-(m−m1). The control unit 20 stores the stored rice amount M as Mk-(m−m1), and can use this value when a rice cooking instruction is input next time.

Next, the control unit 20 activates the rice feeding fan 112 (S25), and executes rice feeding amount measurement processing by the rice weighing unit 120 (S26). Details of step S26 will be described later. When the rice feeding is completed, the control unit 20 stops the rice feeding fan 112 (S27).

When it is determined in step S23 that the amount of stored rice M is less than the required amount of rice m (Yes in step S23), the control unit 20 notifies the user via the output unit 23 (step S28). For example, the control unit 20 causes the display unit 31 to display that the amount of rice is insufficient, or causes the speaker 32 to output that the amount of rice is insufficient or to output a warning sound. Alternatively, the control unit 20 may notify the user's terminal such as a smart phone via the communication interface 25 . When the notification is given, rice cooking by the rice cooker 1 is not executed. The user can know that the amount of rice is insufficient by the notification, and can replenish the rice and instruct the execution of rice cooking again.

When it is determined in step S22 that the stored rice amount M is greater than the predetermined amount M0 (Yes in step S22), the process proceeds to step S25.

FIG. 31 is a flow chart showing the flow of the rice transfer amount measurement processing step S26 of FIG. First, the control unit 20 determines the required number of rotations N of the measuring blade 121 required to transfer the amount of rice specified in the rice cooking instruction (S1 in FIG. 28) (S261).

Next, the controller 20 drives the drive motor 123 to rotate the metering blade 121 in the supply direction (S262). When the rotation starts, the controller 20 acquires the rotation speed n of the metering blade 121 detected by the rotation speed sensor 141 (S263). The number of rotations n is the number of rotations of the metering blade 121 from the start of rotation. Next, the control unit 20 determines whether or not the rotation speed n is greater than the required rotation speed N determined in step S261 (S264). If the rotation speed n is equal to or less than the required rotation speed N determined in step S261 (No in step S264), the control unit 20 executes steps S262 and S263 again. If the rotation speed n is greater than the required rotation speed N determined in step S261 (Yes in step S264), the process proceeds to step S265. In this manner, the control unit 20 drives the drive motor 123 until the rotation speed n of the metering blade 121 reaches the required rotation speed N.

In step S265, the control unit 20 rotates the drive motor 123 in the rice discharge direction opposite to the supply direction, and rotates the measuring blade 121 in the rice discharge direction. As a result, the weighing vane 121 discharges the rice on the weighing vane 121 into the rice container 100 after the rice feeding is completed.

[2-3. Water supply process]
FIG. 32 is a flow chart showing the flow of water supply step S3 in FIG. First, the control unit 20 determines the amount w of water required for rice cooking based on the amount of rice to be cooked included in the rice cooking instruction from the user (step S4) (S31).

Next, the controller 20 acquires the detection result of the water level in the water container 300 by the water level sensor 313 (S32), and determines the amount of water W0 in the water container 300 based on the detection result (S33). Next, the controller 20 determines whether or not the amount W0 of water in the water container 300 is less than the required amount w determined in step S31 (S34).

If it is determined that the amount W0 of water in the water container 300 is equal to or greater than the required amount w determined in step S31 (No in S34), the controller 20 controls the water supply pump necessary to supply the required amount w of water. The driving time T of 312 is calculated (S35). Next, the controller 20 operates the water pump 312 for the drive time T calculated in step S35 (S36). This causes the designated amount of water to move from the water container 300 to the pot 2 .

As means for detecting the amount of water transferred from the water container 300 to the pan 2, other than the above means, means for measuring the flow rate of water flowing out of the water container 300 can be considered. In this case, for example, a flow sensor that measures the flow rate of water is used. However, there is a problem that the measurement results of the flow rate sensor have many variations, and the amount of water put into the pot 2 cannot be measured with high accuracy. On the other hand, the rice cooker 1 according to the present disclosure uses the water level sensor 313 to detect the water level inside the water container 300 . By using the water level sensor 313 that detects the static water level, it is possible to accurately detect the specified amount of water and throw it into the pan 2, compared to a flow sensor that measures the dynamic flow rate of water. can. Moreover, by using a highly accurate and inexpensive pressure sensor as the water level sensor 313, the manufacturing cost of the rice cooker 1 can be reduced.

Next, the control unit 20 controls the water supply unit 310 to move the water in the water supply channel 311 into the water container 300 (S37). For example, the controller 20 drives the water pump 312 to cause the water in the water channel 311 to flow in a direction opposite to the water feeding direction in step S26. As a result, it is possible to prevent the water remaining in the water channel 311 from rotting, the growth of bacteria in the water channel 311, and the like.

When it is determined in step S34 that the amount of water W0 in the water container 300 is less than the required amount w determined in step S31 (Yes in S34), the control unit 20 notifies the user via the output unit 23. (Step S38). For example, the control unit 20 causes the display unit 31 to display that the amount of water is insufficient, or causes the speaker 32 to output the fact that the amount of water is insufficient or a warning sound. Alternatively, the control unit 20 may notify the user's terminal such as a smart phone via the communication interface 25 . When the notification is given, rice cooking by the rice cooker 1 is not executed. The user can know that the amount of water is insufficient by the notification, and can replenish water and instruct the execution of rice cooking again.

[2-4. Cooking operation]
After finishing the above-described water supply step S3, the rice and water are set in the pot 2. As shown in FIG. Thereafter, a rice cooking operation including a pre-cooking step S4, a boiling-up step S5, a stirring step S6, a boiling maintaining step S7, and a steaming step S8 is performed.

The pre-cooking step S4 is a step in which the temperature inside the pot 2 is kept below the gelatinization temperature (for example, 55°C) while the heating unit 8 heats the rice so that the rice absorbs water. The boiling step S5 is a step of further heating the pan 2 to bring it to a boiling state.

The rice cooker 1 is an automatic rice cooker, and automatically moves the rice in the rice container 100 and the water in the water container 300 to the pot 2 . Since there is no human intervention to flatten or stir the rice before cooking, the rice may pile up in the pot 2 after the rice is put in, and the rice may not be completely submerged. Therefore, there is a problem that the rice soaked in water and the rice not soaked are cooked unevenly, and the taste of the rice after cooking is spoiled. In other words, the problem is that the rice becomes hard because the water in the high-height part of the rice runs out first, and the low-height part of the rice softens because it is soaked in water for a long time.

In addition, when the rinse-free rice is cooked, the starch adhered to the rinse-free rice precipitates and adheres to the bottom of the pan, preventing heat transfer from the pan 2 to the cooked food such as rice. This problem can be solved by lightly washing the non-washed rice once, but the automatic rice cooker 1 cannot wash the rice.

In order to solve these problems, it is desirable to stir the rice and water in the pot at an early stage of rice cooking. One means of solving these problems is to stir the inside of the pot with a stirring member such as a blade immediately after the pre-cooking step S4 or the food in the pot boils. However, in this case, it is necessary to set the stirring member in the pot, which complicates the structure of the rice cooker and requires maintenance of the stirring member, which complicates handling.

Therefore, the rice cooker 1 according to the embodiment of the present disclosure solves the above problem by performing stirring by controlling the pressure in the pot 2 to generate bumping in the stirring step S6.

FIG. 33 is a flow chart showing the flow of the stirring step S6 of FIG. First, the control unit 20 acquires a detection result as to whether or not the boiling detection unit 16 has detected boiling (S61). For example, the boiling detection unit 16 detects boiling when the temperature of the steam reaches or exceeds a predetermined threshold. Alternatively, the boiling detection unit 16 may measure the temperature of the steam generated from the pan 2, and the control unit 20 may determine whether or not the object to be heated inside the pan 2 has boiled.

When boiling is detected (Yes in step S61), the controller 20 closes the pressure valve 15 to block the inside of the pot 2 from the external space (S62). Thereby, the pressure in the pan 2 rises. Next, the control unit 20 acquires the detection result of the pressure P in the pan 2 from the pressure sensor 17, and when the detected pressure P is equal to or greater than a predetermined threshold value Pth (Yes in step S63), the pressure valve 15 is opened (S64). As a result, the pressure in the pot 2 is suddenly lowered to near atmospheric pressure, bumping occurs, and the rice grains are agitated by the generated bubbles.

The threshold Pth is, for example, 5 kPa to 30 kPa. It is known that a gauge pressure in the pan 2 of 20 kPa corresponds to a temperature in the pan 2 of about 105°C. It is known that if the pressure in the pot 2 is 5 kPa or more, the food in the pot 2 can be stirred. It is also known that when the pressure in the pan 2 exceeds 30 kPa, it becomes difficult to prevent boiling over and the surface of the rice becomes sticky. These problems can be avoided by setting the threshold value Pth to 5 kPa to 30 kPa.

FIG. 34 shows the time (minutes) and the temperature (° C. ) is a graph schematically showing the relationship between FIG. 35 is a schematic enlarged view of region R in FIG. 34, and is a graph showing the difference in temperature (pressure) change depending on the amount of rice cooked.

In this embodiment, the pressure valve 15 is opened when the pressure or temperature detected as described above reaches or exceeds the threshold value. becomes 20 kPa), the pressure drops and bumping occurs. In the example shown in FIG. 35, the time from boiling detection (S61) to opening the pressure valve 15 (S64) is T1 (minutes) when the amount of rice is small, and T3 when the amount of rice is maximum. (minutes), and T2 (minutes) if the rice is in between these amounts. Here, T1<T2<T3.

Incidentally, there is also a conventional technique in which a boiling phenomenon is generated by opening a pressure valve during the boiling maintenance process, thereby stirring the cooked rice in the pot (see, for example, Japanese Patent Application Laid-Open No. 2004-344568). However, in the prior art, as shown in the comparative example of FIG. 36, the time from detection of boiling to opening of the pressure valve is a constant value (T0) regardless of the amount of rice to be cooked. This constant value T0 is set so that bumping can occur even if the maximum amount of rice is put into the pot. Therefore, for example, when a small amount of rice is cooked, the pressure valve may not be opened until time T0 has passed, even though a long time has passed since the rice was boiled. In the conventional technology, the problem that the rice in the automatic rice cooker 1 like the embodiment of the present disclosure forms a mountain, and the problem that the starch attached to the unrinsed rice precipitates and adheres to the bottom of the pot is less likely to occur. Therefore, it was not a problem that the pressure valve was not opened and bumping did not occur until a long time T0 had passed. However, in the automatic rice cooker 1 of the embodiment of the present disclosure, it is desirable to stir the rice and water in the pot at an early stage of rice cooking. Therefore, in the present embodiment, especially when the amount of rice is small, the piled rice is stirred at an early stage of rice cooking to break it down, and the state in which all the rice is not soaked in water is quickly eliminated. A configuration such as

The operation of the rice cooker 1 shown in FIG. 28 may include a stirring step S6a shown in FIG. 37 instead of the stirring step S6 in FIG. Compared with the stirring step S6 of FIG. 33, the stirring step S6a of FIG. 37 includes step S63a instead of step S63 of determining whether the detected pressure P is equal to or greater than a predetermined threshold value Pth. That is, when a predetermined time has passed since closing the pressure valve 15 (Yes in step S63a), the control unit 20 opens the pressure valve 15 (S64). As a result, the pressure in the pot 2 is suddenly lowered to near atmospheric pressure, bumping occurs, and the rice grains are agitated by the generated bubbles.

The predetermined time is set according to the amount of rice to be cooked. In some cases it is T2a (minutes). Here, T1a<T2a<T3a. Thus, the time from closing the pressure valve 15 to opening it is set shorter as the amount of rice to be cooked is smaller.

FIG. 38 is a graph showing the difference in temperature (pressure) change depending on the amount of rice cooked in the stirring step S6a. 38 is a schematic enlarged view of a portion corresponding to region R in FIG. 34. FIG. As can be seen by comparison with FIG. 35, the control unit 20 opens the pressure valve 15 when a predetermined time has passed since the pressure valve 15 was closed. As described above, the predetermined time is set according to the amount of rice to be cooked. If it is an intermediate amount between these, it is T2a (minutes).

[3. effects, etc.]
[3-1. Effects on overall configuration, etc.]
As described above, the rice cooker 1 according to the embodiment of the present disclosure includes a bottomed cylindrical pot 2, a housing 3 that houses the pot 2, an upper frame 4, a hinge portion 5, and a lid 6. , a rice container 100 for storing rice, and a rice feeding section 110. - 特許庁The housing 3 is provided so as to face the outer peripheral surface of the pot 2 with a gap therebetween. The upper frame 4 is provided so as to cover between the upper opening of the housing 3 and the upper opening of the pan 2 in plan view. The hinge portion 5 is arranged above the upper frame 4 . The lid body 6 is attached to the hinge part 5 so as to be rotatable about the hinge part 5, and covers the upper opening of the pan 2 so as to be openable and closable. The rice container 100 is provided inside the housing 3 . The rice feeding unit 110 moves the rice stored in the rice container 100 to the pot 2. - 特許庁The rice container 100 has a rice container opening 101 provided at its top. The rice container opening 101 is arranged in front facing the hinge part 5 with the pot 2 interposed therebetween in a plan view.

Thereby, the user can easily put rice from the rice bag into the rice container 100 from the rice container opening 101 provided at the top.

At least part of the rice container 100 is configured to extend from below the pot 2 toward the front facing the hinge portion 5 with the pot 2 interposed therebetween in plan view.

Thereby, the volume of the rice container 100 can be secured by using the space below the pot 2. - 特許庁Moreover, since the rice container 100 extends forward, it is possible to prevent the width of the rice cooker 1 from increasing. Therefore, the downsizing of the rice cooker 1 can be realized, and deterioration of the installability of the rice cooker 1 when there is an object on the side can be prevented. In addition, it is assumed that there are walls behind and to the sides of the rice cooker 1 during use, and that there is also a top plate of a storage space for the rice cooker 1 above the rice cooker 1 . Even in such a case, the user can easily put rice into the rice container 100 from the rice bag because the rice container 100 is in front.

The rice container 100 may include a rice container opening 101 provided at the top and a rice container lid 104 configured to open and close the rice container opening 101 . In this case, the rice container opening 101 may be arranged in front of the pot 2 . The rice cooker 1 is an upper portion of the upper frame 4 and projects upward from the rice container opening 101 between the rice container opening 101 and the pot 2 to prevent water from entering the rice container opening 101. A waterproof wall 9 may be further provided.

By providing the waterproof wall 9, dew that adheres to the bottom of the pot 2 and the lid 6 during rice cooking, and water vapor generated during rice cooking are prevented from entering the rice container 100 through the rice container opening 101 provided at the top. can be prevented from entering the Therefore, it is possible to prevent the rice in the rice container 100 from being soggy or spoiled.

The rice container lid 104 is provided with a first rotating shaft 105 arranged to extend laterally in front of the rice container opening 101, rotates around the first rotating shaft 105, and moves toward the rice container opening. It may be movable between an open position opening 101 and a closed position closing the rice container opening 101 .

Thereby, the rice container lid 104 does not interfere with the lid body 6 when moving from the closed position to the open position.

The rice container lid 104 is pivotable from the closed position until at least a portion of the rice container lid 104 is disposed in the rest position forward and above the first pivot axis 105 in the open position, and in the rest position. It may be configured to be stationary.

As a result, in the open position, the bottom surface of the rice container lid 104 forms a slope facing the rice container 100, and the rice on the slope can be guided into the rice container 100. - 特許庁Therefore, the user can easily put rice into the rice container 100 from the rice bag. Also, it is possible to prevent the rice from spilling when the rice is supplied to the rice container 100 .

The rice cooker 1 may further include a water container 300 that is provided in the housing 3 and stores water, and a water feeder 310 that moves the water stored in the water container 300 to the pot 2 .

As a result, there is no need to supply water from an external water source such as a water supply, and it is possible to prevent the rice cooker from becoming large due to the water supply equipment.

At least part of the water container 300 may be configured to extend forward from below the pot 2 .

Thereby, the rice container 100 and the water container 300 can be gathered in the front position, and the size reduction of the rice cooker 1 can be realized.

The rice container 100 has an inclined side surface 108 that is inclined so that the width of the rice container 100 gradually decreases downward when viewed from the front. may be placed.

Thereby, a wide space can be secured below the inclined side surface 108, and when the water container 300 is arranged in this space, the capacity of the water container 300 can be increased.

Rice cooker 1 may further include a cooling device for cooling the water contained in water container 300 . The cooling device may be a Peltier element 401 .

Thereby, the water contained in the water container 300 can be cooled. Therefore, it is possible to prevent the proliferation of various bacteria in the water container 300 and the putrefaction of the water. Also, by cooking the rice with cooled water, the taste of the cooked rice is improved.

The rice cooker 1 includes a heat sink 403 attached to the heat generating surface of the Peltier element 401, a temperature sensor 410 detecting the temperature of the heat sink 403, a cooling fan 407 blowing air toward the heat sink 403, and controlling the rotation of the cooling fan 407. You may further provide the control part 20 which carries out. Control unit 20 controls the rotation of cooling fan 407 so that the temperature of heat sink 403 detected by temperature sensor 410 is within a predetermined temperature range.

Thereby, the temperature change of the Peltier element 401 can be reduced. Therefore, the life of the Peltier element 401 can be extended, and the cooling ability can be exhibited for a long period of time.

The rice cooker 1 may further include a switching transistor for supplying power to the heating unit 8 that heats the pan 2, and a heat sink 11 attached to the switching transistor. The heat sink 11 is placed downwind of the air supplied by the cooling fan 407 . The heat sink 403 and the heat sink 11 are aligned in the air flow direction supplied by the cooling fan 407 .

Thereby, the cooling fan 407 can cool not only the heat sink 403 but also the heat sink 11 . Therefore, there is no need to further provide a fan for cooling the switching transistor or the substrate 10 on which it is mounted in the rice cooker 1, so that the size reduction can be achieved while ensuring the cooling function.

[3-2. Effects on the composition of the rice delivery department, etc.]
The rice cooker 1 according to the embodiment of the present disclosure includes a pot 2, a housing 3 that accommodates the pot 2, and a lid 6 that is attached above the housing 3 and covers the upper opening of the pot 2 so that it can be opened and closed. , a rice container 100 which is provided in a housing 3 and stores rice, and a rice feeding section 110 which moves the rice stored in the rice container 100 to the pot 2.例文帳に追加The rice feeding unit 110 has a rice feeding path 111 for transferring rice from the rice container to the pot, pushes in the rice, measures the amount of rice pushed in based on the pushing amount, and feeds the specified amount of rice. and a rice weighing unit 120 feeding the channel 111 .

As a result, since the rice can be weighed while being moved horizontally, there is no need to provide a space for weighing in the height (vertical) direction. If a space for such weighing is provided in the lid above the pot, the lid becomes large. When the lid of the rice cooker becomes large and heavy, the opening and closing mechanism of the lid is inevitably complicated, which leads to further enlargement of the rice cooker. In contrast, in the present embodiment, which does not require a space for weighing above the pot, the rice container 100 can be provided inside the housing 3, and the size of the rice cooker 1 can be reduced.

The rice weighing unit 120 may push the rice horizontally or obliquely into the rice feeding path 111 .

Thus, the method of weighing rice is not limited to dropping the rice downward by gravity. Therefore, the rice weighing unit 120 can be arranged in various spaces.

The rice measuring portion 120 includes a measuring blade 121 spirally formed around a first axis, a guide portion 122 having a cylindrical shape and covering the outer circumference of the measuring blade 121, and a guide portion 122 extending around the first axis. and a drive motor 123 that rotates the The measuring blade 121 rotates about the first axis in the supply direction to feed the rice in the axial direction along the inner peripheral surface of the guide part 122 and supply the specified amount of rice to the rice feeding path 111. do.

As a result, the guide portion 122 covers the outer periphery of the metering blade 121 . Therefore, the amount of rice transferred with the rotation of the weighing blade 121 is stabilized, and the weighing accuracy is improved.

The rice weighing unit 120 may have a rotation speed sensor 141 that detects the rotation speed of the weighing vane 121 .

Thereby, the rotational speed sensor 141 detects the rotational speed of the metering blade 121 . Therefore, the specified amount of rice can be accurately weighed.

One end of the weighing vane 121 may be connected to the rice feeding path 111 and the other end may be connected to a rice transfer section arranged inside the rice container 100 . The rice transfer section transfers rice from the rice container 100 to the weighing vane 121 . The rice transfer section may include a rice transfer vane 148 that is spirally formed around the second axis and rotates around the second axis to transfer the rice to the weighing vane 121 .

As a result, the rice in front of the rice container 100 can be transferred to the measuring blade 121 without providing the bottom surface of the rice container 100 with a slope for the rice to slide down to the rear measuring blade 121.例文帳に追加Therefore, it is possible to increase the capacity of the rice container 100 and prevent rice from remaining in the rice container 100 .

The rice transfer vane 148 is connected to the weighing vane 121 so that the second axis and the first axis are aligned. It may be configured to rotate about an axis.

As a result, the rice transfer blade 148 and the metering blade 121 are concentrically connected in series, and the rice transfer blade 148 and the metering blade 121 can be driven by one drive motor 123 . Therefore, the drive motor 123 is shared by the rice transfer blade 148 and the weighing blade 121, which simplifies the structure and contributes to the miniaturization of the rice cooker 1.

The rice transfer vane 148 may be configured to be detachably connected to the metering vane 121 .

This allows the removed rice transfer blade 148 to be washed. Also, the inside of the rice container 100 can be cleaned with the rice transfer blade 148 removed. Therefore, the ease of cleaning the rice transfer blade 148 and the rice container 100 is improved, and the rice cooker 1 can be kept hygienic.

In the rice cooker 1, when the rice transfer blade 148 and the measurement blade 121 are connected, the rotational driving force of the drive motor 123 is transmitted to the measurement blade 121, while the rice transfer blade 148 and the measurement blade 121 are connected. A clutch mechanism 128 configured to prevent the rotational driving force of the drive motor 123 from being transmitted to the metering vanes 121 when not in use may also be provided.

Accordingly, when the rice transfer vane 148 and the weighing vane 121 are not connected, the rotational driving force of the drive motor 123 is not transmitted to the weighing vane 121 . Therefore, it is possible to prevent a situation in which the weighing is performed assuming that there is no rice on the weighing vane 121, and the weighing is performed with low accuracy.

After the rice feeding unit 110 moves the rice weighed by the rice weighing unit 120 to the pot, the driving motor 123 rotates the first shaft in the opposite direction to the feeding direction to move the rice on the weighing blade 121 to the rice container. It may be configured to discharge into 100 .

As a result, it is possible to prevent rice from remaining on the weighing vane 121 even after rice feeding is completed. Therefore, it is possible to solve the problem of measuring errors due to the remaining rice in the next rice transfer, and to measure the rice with high accuracy.

The rice cooker 1 may further include a stored rice amount sensor 230 that detects the amount of rice stored in the rice container 100 and a control section 20 that controls movement of the rice by the rice feeding section 110 . When the amount of stored rice detected by the stored rice amount sensor 230 is less than the specified amount, the control unit 20 stops the rice transfer unit 110 from moving the rice to the pot, and/or notifies that by the notification device. notify.

As a result, when the amount of rice is insufficient, the rice is not moved, etc., and the user can know that the amount of rice is insufficient, replenish the rice, and instruct the execution of rice cooking again. can do.

The stored rice amount sensor 230 may be a sensor that detects whether the amount of rice stored in the rice container 100 is equal to or greater than a predetermined amount. When the stored rice amount sensor 230 detects that the amount of rice stored in the rice container 100 is equal to or less than the predetermined amount M0, the control unit 20 determines the predetermined amount M0 and the specified amount M0. Using the calculated amount m, the amount of rice in the current rice container 100 is calculated.

Thereby, the rice cooker 1 can always grasp the amount of rice stored in the rice container 100 .

The stored rice amount sensor 230 is an electrostatic touch sensor and may be arranged outside the rice container 100 .

Thereby, the stored rice amount sensor 230 does not drop into the rice container 100 unlike the sensor provided inside the rice container 100 . Also, when an infrared sensor is used, rice flour or the like degrades the detection accuracy, but when an electrostatic touch sensor is used, rice flour or the like does not degrade the detection accuracy. Therefore, the amount of stored rice can be stably and accurately detected.

The rice cooker 1 may further include a rice feeding fan 112 and a rice separator 150 . The rice feeding fan 112 moves the air in the rice feeding path 111, thereby moving the rice from the rice container 100 to the pot. The rice separating device 150 is arranged in the rice feeding path 111, and has an intake port 151 for taking in the rice and air moved by the rice feeding fan 112, an exhaust port 152 for discharging the air, and a rice discharging port 154 for discharging the rice. And prepare. The rice separator 150 separates the rice and air taken in from the air inlet 151 by using the fluidity of the air taken in from the air inlet 151, discharges the rice only from the rice discharge outlet 154, and discharges the air from the air outlet 152. Discharge only rice and do not discharge rice. Rice discharged from the rice discharge port 154 is supplied to the pot 2 .

As a result, the rice can be reliably put into the pot 2 in the rice feeding mechanism using the rice feeding fan 112 that causes the air in the rice feeding path 111 to flow. In addition, since the rice cooker 1 does not use a filter for separating rice, clogging of the filter does not occur, and rice can be fed stably over a long period of time.

The rice separator 150 may be provided inside the lid 6 .

This can prevent the width or depth of the rice cooker 1 from increasing. Therefore, it is possible to prevent deterioration of the installability of the rice cooker 1 when there is an object or a wall on the side.

[3-3. Effect of Configuration of Water Conveying Unit, etc.]
The rice cooker 1 according to the embodiment of the present disclosure includes a pot 2, a housing 3 that accommodates the pot 2, a water container 300 that contains water, a water feeder 310, and a water level that detects the water level in the water container 300. A sensor 313 , an input unit 22 , and a control unit 20 are provided. A water container 300 is provided within the housing 3 . The water supply unit 310 transfers water stored in the water container 300 to the pot 2 before rice is cooked. The input unit 22 receives operation instructions from the user. Based on the detection result of the water level sensor 313 , the control unit 20 controls the water supply unit 310 to move a specified amount of water to the pot 2 according to the operation instruction.

Thereby, the rice cooker 1 can accurately move the specified amount of water from the water container 300 to the pot 2 before cooking rice. In particular, by using the water level sensor 313 that detects the static water level, the specified amount of water is accurately detected and put into the pot 2 compared to the flow rate sensor that measures the dynamic water flow rate. be able to.

The control unit 20 may calculate the amount of water moved from the water container 300 to the pan 2 based on the difference in water level detected by the water level sensor 313 before and after the water is moved by the water supply unit 310 .

Thereby, the rice cooker 1 can accurately detect the amount of water moved from the water container 300 to the pot 2, and can accurately measure the specified amount of water according to the operation instruction and put it into the pot 2. - 特許庁

The water supply section 310 may include a water supply channel 311 between the water container 300 and the pot 2 . The water container 300 may be detachably attached to the housing 3 . The water container 300 comprises an outlet 303 that is connected to the water channel 311 when attached to the housing 3 . When the water container 300 is removed from the housing 3, the outlet 303 is closed to prevent water from passing through. It further comprises a ball valve 305 configured to pass therethrough.

Since the water container 300 is detachably attached to the housing 3, the user can remove the water container 300 and easily replenish water. When the water container 300 is removed from the housing 3, the ball valve 305 closes the outlet 303 to prevent water from leaking.

The water supply unit 310 may include a water supply pump 312 that moves water in the water supply channel 311 .

Thereby, even when the water container 300 is not arranged above the pot 2 , water can be fed from the water container 300 to the pot 2 by the water pump 312 . Therefore, the water container 300 can be arranged in a space other than above the pot 2, and the size reduction of the rice cooker 1 can be realized.

Water level sensor 313 may detect the water level in water container 300 by measuring the pressure in water channel 311 . Water level sensor 313 may be configured to sense a pressure corresponding to the difference between the water level in water channel 311 and the water level in water container 300 .

As a result, detection results with less variation can be obtained, and the specified amount of water can be measured with high accuracy. Moreover, the manufacturing cost of the rice cooker 1 can be reduced by using a highly accurate and inexpensive pressure sensor.

The control unit 20 may control the water supply unit 310 so that the water remaining in the water supply channel 311 is returned to the water container 300 after the specified amount of water is moved from the water container 300 to the pot 2 . .

As a result, it is possible to prevent the water remaining in the water channel 311 from rotting after the specified amount of water has been moved to the pot 2 and the growth of bacteria in the water channel 311. - 特許庁

The rice cooker 1 may further include an output unit 23 that notifies the user. When the amount of water corresponding to the water level detected by the water level sensor 313 is less than the designated amount, the control unit 20 stops the water supply unit 310 from moving water to the pan 2 and/or notifies the effect by the output unit 23. do.

As a result, when the amount of rice is insufficient, the rice is not moved, etc., and the user can know that the amount of rice is insufficient, replenish the rice, and instruct the execution of rice cooking again. can do.

[3-4. Effect on rice cooking operation, etc.]
The rice cooker 1 according to the embodiment of the present disclosure is an automatic rice cooker that cooks rice by moving a designated amount of rice and water determined based on an operation instruction by a user to the pot 2 . The rice cooker 1 includes a pot 2, a housing 3 that houses the pot 2, a lid 6 that closes an opening of the pot 2, and a pressure valve that can open and close a hole that communicates the inside of the pot 2 with an external space. 15, and a rice container 100 provided in the housing 3 and containing rice. The rice cooker 1 includes a rice feeding unit 110 that moves rice from the rice container 100 to the pot 2, a heating unit 8 that heats the pot 2, and a boiling detection unit 16 that detects that the water in the pot 2 has boiled. Prepare more. The rice cooker 1 further includes an input unit 22 that receives operation instructions from a user, and a control unit 20 . The control unit 20 controls movement of rice by the rice feeding unit 110 , movement of water by the water feeding unit 310 , heating by the heating unit 8 , and opening and closing of the pressure valve 15 . When the specified amount is the first amount, the control unit 20 sets the time from closing to opening of the pressure valve 15 to the first time, and when the specified amount is the second amount, the control unit 20 sets the pressure valve 15 to the first time. Set the second time to open after closing. The control unit 20 sets the first amount to be greater than the second amount and the first time to be longer than the second time.

In an automatic rice cooker, there is no human intervention to flatten or stir the rice before it is cooked, so after the rice is added, it becomes a mountain in the pot and the rice is not completely submerged in water. Sometimes. In addition, when the rinse-free rice is cooked, the starch adhered to the rinse-free rice precipitates and adheres to the bottom of the pan, thereby hindering heat transfer from the pan to the cooked food such as rice. This problem can be solved by lightly washing the rinse-free rice once, but automatic rice cookers cannot wash the rice. With the configuration as described above, the rice cooker 1 can stir the rice in the pot 2 by generating bumping after detecting boiling. Therefore, it is possible to break the mountain of rice to flatten it, and prevent uneven cooking between the rice soaked in water and the rice not soaked. In addition, it is possible to solve the problem that the stirring causes the starch to precipitate and stick to the bottom of the pan, thereby hindering the transfer of heat from the pan to the cooked food such as rice.

After the boiling detection unit 16 detects boiling, the control unit 20 closes the pressure valve 15 to increase the pressure in the pot 2, and then opens the pressure valve 15 to reduce the pressure in the pot 2 at once to cause bumping. is generated to stir the rice in the pot 2.

As a result, as described above, the rice in the pot 2 can be agitated by generating bumping after boiling is detected. Therefore, it is possible to break the mountain of rice to flatten it, and prevent uneven cooking between the rice soaked in water and the rice not soaked. In addition, it is possible to solve the problem that the stirring causes the starch to precipitate and stick to the bottom of the pan, thereby hindering the transfer of heat from the pan to the cooked food such as rice.

The controller 20 may shorten the time from closing the pressure valve 15 to opening it as the designated amount is smaller.

Thereby, when the amount of rice to be cooked is large, it is possible to lengthen the time from closing the pressure valve 15 to opening it, and to adjust so that bumping occurs when the pressure valve 15 is opened. In addition, when the amount of rice to be cooked is small, the time from closing the pressure valve 15 to opening it is shortened, and adjustment is made so that bumping occurs when the pressure valve 15 is opened, and the time after boiling is long. It is possible to prevent a situation in which the pressure valve is not opened despite the passage of time. Therefore, regardless of the amount of rice to be cooked, it is possible to stir the rice at an early stage of cooking to solve the problem of uneven cooking and the problem of starch precipitates and sticking to the bottom of the pot.

The rice cooker 1 may further include a pressure sensor 17 that detects the pressure inside the pot 2 . The control unit 20 opens the pressure valve 15 when the pressure detected by the pressure sensor 17 reaches or exceeds a predetermined threshold value Pth.

As a result, the rice can be stirred at an early stage of cooking regardless of the amount of rice to be cooked. Therefore, it is possible to solve the problem of uneven cooking and the problem of starch depositing and adhering to the bottom of the pan.

The predetermined threshold value Pth may be 5 kPa to 30 kPa.

It is known that a gauge pressure in the pan 2 of 20 kPa corresponds to a temperature in the pan 2 of about 105°C. It is known that if the pressure in the pot 2 is 5 kPa or more, the food in the pot 2 can be stirred. It is also known that when the pressure in the pan 2 exceeds 30 kPa, it becomes difficult to prevent boiling over and the surface of the rice becomes sticky. These problems can be avoided by setting the threshold value Pth to 5 kPa to 30 kPa.

(Other embodiments)
As described above, the embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like. Further, it is also possible to combine the constituent elements described in the above embodiments to form a new embodiment. Therefore, other embodiments will be exemplified below.

In the above embodiment, as shown in FIG. 31, the controller 20 acquires the rotation speed n of the metering blade 121 detected by the rotation speed sensor 141 (S263), and determines the rotation speed n of the metering blade 121 to be the required rotation An operation example in which the drive motor 123 is driven until the number N is reached has been described. However, the present disclosure is not limited to this, and the rice cooker 1 may measure the amount of rice fed by rotating the measuring blade 121 .

For example, the rice transfer step S2 shown in FIG. 30 may include the rice transfer amount measurement process S26a shown in FIG. 39 instead of the rice transfer amount measurement process S26 (FIG. 31). In the rice feeding amount measurement process S26a, the control unit 20 determines the required rotation time t of the measuring blade 121 required to transfer the amount of rice specified in the rice cooking instruction (S1 in FIG. 28) (S261a). Next, the controller 20 rotates the metering vane 121 in the supply direction for the required rotation time t (S262a). Next, the control unit 20 rotates the drive motor 123 in the rice discharge direction opposite to the supply direction, and rotates the measuring blade 121 in the rice discharge direction (S265).

In the above embodiment, as shown in FIG. 32, the control unit 20 calculates the drive time T of the water pump 312 required to supply the required amount w of water (S35), and the water pump is operated for the drive time T only. 312 is operated (S36). However, the present disclosure is not limited to this, as long as the rice cooker 1 can supply the required amount w of water to the pot 2 .

For example, in the operation of the rice cooker 1 shown in FIG. 28, the control unit 20 may include a water supply step S3a shown in FIG. 40 instead of the water supply step S3 (FIG. 32). Steps S31 to S34, S37, and S38 shown in FIG. 40 are the same as those in FIG. 32, so description thereof will be omitted.

When it is determined in step S34 that the amount W0 of water in the water container 300 is equal to or greater than the required amount w determined in step S31 (No in S34), the control unit 20 sets the variable w1 to the required amount w ( S301), the loop processing of S302 to S309 is started. After step S301, the control unit 20 calculates the driving time Tp of the water pump required to supply water of P % of the variable w1 (S302). Next, the control unit 20 operates the water pump 312 for the driving time Tp calculated in step S302 (S303). The value of P is, for example, 50, 60, 70, 80, 90, 95, etc., but is not limited thereto and may be any value.

Next, the control unit 20 acquires the detection result of the water level in the water container 300 by the water level sensor 313 (S304), and determines the amount W1 of water in the water container 300 based on the detection result (S305). The control unit 20 calculates the amount w2 of water actually supplied in step S303 (S306). Here, w2=W0-W1. Next, the control unit 20 calculates the error e between the amount w2 of water actually supplied in step S303 and the variable w1 (S307). Here, e=(w1-w2)/w1. If the error e calculated in step S307 is equal to or greater than the predetermined reference error eK (No in step S308), the control unit 20 sets the variable w1 to (w1-w2) (S309), and proceeds to step S302. return. If the error e calculated in step S307 is less than the predetermined reference error eK (Yes in step S308), the process proceeds to step S37. The value of the reference error eK is, for example, 0.05, but is not limited to this and may be any value.

By including the water supply step S3a shown in FIG. 40 instead of the water supply step S3 (FIG. 32), the amount of water supplied to the pot 2 can be measured more accurately.

In the above embodiment, the rice cooker 1 provided with the Peltier element 401 for cooling the water in the water container 300 has been described. The Peltier element 401 does not need to operate all the time as long as it prevents the growth of bacteria and putrefaction of the water by cooling the water. For example, the control unit 20 may stop the operation of the Peltier device 401 during the rice cooking, for example, during the heating operation by the heating unit 8 . As a result, it is possible to prevent a large current from flowing through the Peltier element 401 against heating. Therefore, it is possible to extend the life of the Peltier device 401, or to save energy without requiring a large current. Alternatively, it is not necessary to make the Peltier element 401 large enough to sufficiently cool it during rice cooking. As a result, the size of the Peltier device 401 can be reduced, and thus the size of the rice cooker 1 can be reduced.

In the above-described embodiment, the rice cooker includes the rice container 100 and the water container 300, and cooks rice by moving the specified amount of rice and water determined based on the user's operation instruction to the pot 2. 1 has been explained. However, the technology in the present disclosure is not necessarily limited to being applied to a rice cooker that includes both the rice container 100 and the water container 300. For example, the configuration of the rice feeding unit 110 and the rice feeding step S2 shown in FIG. 30 realized by this may be applied to a rice cooker that has a rice container but does not have a water container. Such a rice cooker is, for example, connected to a rice container provided in a housing, a rice feeding mechanism for moving the rice in the rice container to the pot 2, and a water supply or an external water tank. A water supply mechanism for supplying water from the tank to the pot 2 is provided.

Similarly, the stored rice amount detection step S9 shown in FIG. 29 and the stirring steps S6 and S6a shown in FIGS.

Note that the above-described embodiment is for illustrating the technology in the present disclosure, and various changes, replacements, additions, omissions, etc. can be made within the scope of the claims or equivalents thereof.

The present disclosure is applicable to rice cookers.

Reference Signs List 1 rice cooker 2 pot 3 housing 4 upper frame 5 hinge 6 lid 8 heating unit 9 waterproof wall 10 substrate 11 heat sink 12 heat insulating material 15 pressure valve 16 boiling detection unit 17 pressure sensor 20 control unit 21 storage unit 22 input unit 23 Output unit 25 Communication interface 31 Display unit 32 Speaker 40 User interface 100 Rice container 100a Inner wall 100b Bearing unit 101 Rice container opening 103 Door 104 Rice container lid 104a Front end 104b Lid seat 105 First rotation shaft 106 Second rotation Driving shaft 107 Inner lid 108 Inclined side surface 109 Side surface 110 Rice feeding section 111 Rice feeding path 112 Rice feeding fan 113 Exhaust pipe 120 Rice measuring section 121 Measuring blade 121a Seat surface 122 Guide section 123 Drive motor 124 Input shaft 125 Coupling section 126 Output shaft 126a Tip 127 Engaging Part 128 Clutch Mechanism 129 Rice Feeding Path Entrance 130 Rice Feeding Path Lid 131 Packing 132 Fixing Base 141 Revolution Sensor 148 Rice Transfer Blade 150 Rice Separator 151 Intake Port 152 Exhaust Port 153 Main Body 154 Rice Discharge Port 200 Transfer Rice lid opening and closing device 201 rice feeding lid 202 fixing base 203 packing 204 motor fixing base 205 rotating body seat 210 motor 211 spur gear 212 rotating body 212a gear 212b link pin 213 rotating body seat 213a rack gear 214 rotating shaft 214a gear 220 link 221 link 222 Gap 230 Rice storage amount sensor 300 Water container 301 Water container storage part 302 Lid 303 Outlet 304 Cold guide plate 305 Ball valve 307 Valve plunger 310 Water supply part 311 Water supply channel 312 Water supply pump 313 Water level sensor 314 Packing 315 Water supply channel inlet 400 Peltier unit 401 Peltier element 401a Cooling surface 403 Heat sink 405 Temperature sensor 407 Cooling fan 409 Heat sink 410 Temperature sensor 411 Packing 413 Front cover 414 Rear cover

Claims (4)

a pot and
a housing that accommodates the pot;
a lid that closes the opening of the pot;
a pressure valve that operates to open and close a hole that communicates the inside of the pan with the external space;
a rice container that is provided in the housing and stores rice;
a rice transfer unit for transferring rice from the rice container to the pot;
a heating unit that heats the pot;
a boiling detection unit that detects that the water in the pot has boiled;
an input unit that receives an operation instruction from a user;
a control unit that controls movement of rice by the rice feeding unit, heating by the heating unit, and opening and closing of the pressure valve;
An automatic rice cooker that moves a specified amount of rice determined based on the operation instruction to the pot and performs a rice cooking process including a boiling maintaining process ,
The rice feeding unit supplies rice from the rice container to the pot from above the pot,
The control unit closes the pressure valve to increase the pressure in the pot, and then opens the pressure valve to reduce the pressure in the pot at once, thereby generating bumping and causing the pot to flow from above. performing a stirring step of stirring the rice in the pot so that a portion of the supplied rice that is not soaked in the water is soaked in the water before starting the boiling maintaining step;
When the designated amount is the first amount, the control unit sets the time from closing to opening of the pressure valve in the stirring step to the first time, and sets the designated amount to the second amount. Sometimes, the time from closing to opening of the pressure valve in the stirring step is set to a second time, the first amount is greater than the second amount, and the first time is the second amount. A rice cooker that is set to be longer than the time in 2. 2. The rice cooker according to claim 1, wherein said control unit closes said pressure valve to increase the pressure in said pot after said boiling detection unit detects boiling. Further comprising a pressure sensor for detecting the pressure in the pan,
The rice cooker according to claim 1 or 2, wherein the control unit opens the pressure valve when the pressure detected by the pressure sensor reaches or exceeds a predetermined threshold in the stirring step . The rice cooker according to claim 3, wherein the predetermined threshold is 5 kPa to 30 kPa.

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