JP6782459B2 - Pressure type rice cooker - Google Patents

Description

The present invention relates to a pressure-type rice cooker capable of automatically cleaning a pot and a lid.

Conventionally, as a pressure type rice cooker of this kind, for example, the pressure type rice cooker described in Patent Document 1 is known. Patent Document 1 describes a pressure-type rice cooker that performs a rising heating step of boiling water in a pot and a boiling maintenance step of maintaining the water in the pot in a boiling state when a cleaning course is selected. It is disclosed. The pressure-type rice cooker of Patent Document 1 is configured to heat and pressurize the inside of a pot in a rising heating step, and to change the pressure so that a plurality of bumping phenomena occur in a boiling maintenance step. According to this configuration, steam can be passed through the pot and the lid to remove dirt and odors from parts that are difficult to reach even if washed completely, such as a pressure valve inside the lid.

Japanese Unexamined Patent Publication No. 2012-95894

However, in the conventional pressure type rice cooker, there is still room for improvement from the viewpoint of further improving the cleanliness of the rice cooker.

Therefore, an object of the present invention is to provide a pressure type cooker capable of further improving the cleanliness of the rice cooker in solving the above-mentioned problems.

In order to achieve the above object, the pressure type rice cooker according to the present invention includes a pot and
A lid that opens and closes the opening of the pot,
The heating part that heats the pot and
A pressure valve that opens and closes a steam discharge hole that communicates between the inside of the pot and the inside of the lid.
A rising heating step of controlling the heating unit and the pressure valve to boil the water in the pot, a boiling maintenance step of maintaining the boiling state of the water in the pot, and increasing the pressure in the pot. And a control unit that performs a cleaning course including a step of reducing the pressure and pressure.
In the start-up heating step and the boiling maintenance step, the control unit controls the pressure valve so as to open the steam discharge hole so that the pressure in the pot is close to the atmospheric pressure, and the pressurization / depressurization step. In, the pressure valve is controlled so as to open and close the steam discharge hole a plurality of times to raise and lower the pressure in the pot.
It is configured as follows.

According to the pressure type rice cooker according to the present invention, the cleanliness of the rice cooker can be further improved.

It is a schematic sectional view of the pressure type rice cooker which concerns on embodiment of this invention. It is sectional drawing which shows in the perspective view of the pressure type rice cooker of FIG. It is a graph which shows the relationship between the temperature in a pot, the pressure in a pot, the open / closed state of a pressure valve, and the heating power of a pot bottom heating unit when an example of a cleaning process is performed using the pressure type rice cooker of FIG.

(Findings underlying this disclosure)
As a result of diligent studies to further improve the cleanliness of the rice cooker, the present inventors have obtained the following new findings.

In a conventional pressure-type rice cooker, the pressure valve is closed during the start-up heating process to raise the pressure inside the pot, and the pressure valve is opened and closed at the beginning of the boiling maintenance process, which is a high-pressure state, to cause multiple boiling phenomena. It is configured to give rise. According to this configuration, when the bumping phenomenon is repeatedly generated multiple times, dirt and odor components such as rice cakes (viscous broth, which is the umami component of rice) that adhere to the pot and lid are difficult to remove. Can occur.

On the other hand, in the boiling maintenance step, the present inventors open the steam discharge hole to maintain the pressure in the pot near the atmospheric pressure, and after the boiling maintenance step is completed, the steam discharge hole is opened and closed a plurality of times in the pot. It was found that the step of pressurizing and depressurizing to fluctuate the pressure of According to this configuration, in the boiling maintenance step, by opening a steam discharge hole and maintaining the pressure in the pot near the atmospheric pressure, steam is distributed to every corner in the pot and the lid, and the pot and the lid are covered. It is possible to make it easy to remove (soak) dirt and odorous components such as attached pots. Further, by performing the pressurizing / depressurizing step in this state, dirt and odor components can be removed more reliably, and the cleanliness of the rice cooker can be improved. Based on this new finding, the present inventors have arrived at the following inventions.

According to the first aspect of the present invention, a pot and
A lid that opens and closes the opening of the pot,
The heating part that heats the pot and
A pressure valve that opens and closes a steam discharge hole that communicates between the inside of the pot and the inside of the lid.
A rising heating step of controlling the heating unit and the pressure valve to boil the water in the pot, a boiling maintenance step of maintaining the boiling state of the water in the pot, and increasing the pressure in the pot. And a control unit that performs a cleaning course including a step of reducing the pressure and pressure.
In the start-up heating step and the boiling maintenance step, the control unit controls the pressure valve so as to open the steam discharge hole so that the pressure in the pot is close to the atmospheric pressure, and the pressurization / depressurization step. Provided is a pressure type rice cooker that controls the pressure valve so as to open and close the steam discharge hole a plurality of times to raise and lower the pressure in the pot.

According to the second aspect of the present invention, in the control unit, the heating power supplied to the heating unit in the boiling maintenance step is lower than the heating power supplied to the heating unit in the rising heating step. The pressure-type rice cooker according to the first aspect is provided.

According to the third aspect of the present invention, in the control unit, the heating power supplied to the heating unit in the pressurization / depressurization step is higher than the heating power supplied to the heating unit in the boiling maintenance step. The pressure-type rice cooker according to the first or second aspect to be controlled is provided.

According to the fourth aspect of the present invention, in the control unit, the heating power supplied to the heating unit in the pressurization / depressurization step is equal to or less than the heating power supplied to the heating unit in the start-up heating step. The pressure type rice cooker according to any one of the first to third aspects to be controlled is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

<< Embodiment >>
The pressure type rice cooker according to the embodiment of the present invention will be described. FIG. 1 is a schematic cross-sectional view of a pressure-type rice cooker according to an embodiment of the present invention. FIG. 2 is a perspective view of the pressure-type rice cooker of FIG.

As shown in FIG. 1, the pressure-type rice cooker according to the present embodiment is stored in a substantially bottomed tubular rice cooker body 1 in which a pot storage portion 1a is formed, and a pot storage portion 1a, and is stored in rice or rice. It is equipped with a pot 2 in which food such as water can be placed. An outer lid 3 having a hollow structure capable of opening and closing the upper opening of the rice cooker main body 1 is attached to the upper portion of the rice cooker main body 1. On the inside of the outer lid 3 (the side that covers the upper opening of the pot 2), a substantially disk-shaped inner lid 4 that can seal the upper opening of the pot 2 is detachably attached. In the present embodiment, the outer lid 3 and the inner lid 4 form a lid that covers the opening of the pot 2 so as to be openable and closable.

The pot storage portion 1a of the rice cooker main body 1 is composed of an upper frame 1b and a coil base 1c. The upper frame 1b has a tubular portion 1ba arranged so as to leave a predetermined gap with respect to the side wall of the stored pot 2, and an upper opening of the rice cooker main body 1 protruding outward from the upper portion of the tubular portion 1ba. It is provided with a flange portion 1bb that fits into the inner peripheral portion of the rice cooker. The upper end of the tubular portion 1ba supports a flange portion 2a provided around the upper opening of the pan 2.

The coil base 1c is formed in a bottomed tubular shape corresponding to the shape of the lower portion of the pan 2, and the upper portion thereof is attached to the lower end portion of the tubular portion 1ba of the upper frame 1b. On the outer peripheral surface of the coil base 1c, a pot bottom heating unit 5 which is an example of a heating unit for heating (induction heating) the pot 2 is attached. The pot bottom heating unit 5 is composed of an in-bottom heating coil 5a and an outside-bottom heating coil 5b. The in-bottom heating coil 5a is arranged so as to face the periphery of the central portion of the bottom of the pan 2 via the coil base 1c. The outer bottom heating coil 5b is arranged so as to face the corner portion of the bottom portion of the pan 2 via the coil base 1c.

An opening is provided in the central portion of the bottom of the coil base 1c. In the opening, a pot temperature sensor 6, which is an example of a pot temperature detecting unit for measuring the temperature of the pot 2, is arranged so as to be in contact with the bottom of the pot 2 housed in the pot storage portion 1a. .. Since the temperature of the pot 2 is substantially the same as the temperature of the object to be cooked in the pot 2, the pot temperature sensor 6 can detect the temperature of the object to be cooked in the pot 2 by detecting the temperature of the pot 2. it can.

The outer lid 3 includes an upper outer shell member 3a and a lower outer shell member 3b that form the outer shell of the outer lid 3. Further, the outer lid 3 includes a hinge shaft 3A. The hinge shaft 3A is an opening / closing shaft of the outer lid 3, and both ends thereof are rotatably fixed to the upper frame 1b of the rice cooker main body 1. A torsion coil spring 7 is attached around the hinge shaft 3A. The torsion coil spring 7 elastically biases the outer lid 3 in the direction away from the upper opening of the pan 2 (opening direction) with the hinge shaft 3A as the center.

A lid opening device 8 is provided inside the outer lid 3. The lid opening device 8 keeps the state in which the outer lid 3 closes the upper opening of the pot 2 by engaging with a part of the rice cooker main body 1. On the other hand, the lid opening device 8 is centered on the hook shaft 8A when the lid opening button 8B (see FIG. 2) provided on the outer lid 3 is pressed while the outer lid 3 closes the upper opening of the pot 2. Rotate in the direction of arrow A1. As a result, the lid opening device 8 and a part of the rice cooker main body 1 are disengaged, and the outer lid 3 is separated from the upper opening of the pot 2 about the hinge shaft 3A by the urging force of the torsion coil spring 7. Rotate to. As a result, the outer lid 3 is in an open state that does not block the upper opening of the pot 2. The outer lid 3 is configured to stop the rotation when, for example, the outer lid 3 is rotated 90 degrees around the hinge shaft 3A from a position where the upper opening of the pot 2 is closed.

A recess 3d is provided in the vicinity of the hinge shaft 3A of the upper outer member 3a. A steam cylinder 9 is detachably attached to the recess 3d. At the bottom of the recess 3d, a steam escape hole 3da is provided so that excess steam in the pot 2 can be discharged toward the steam cylinder 9. The upper wall of the steam cylinder 9 is provided with a steam relief hole 9a so that excess steam in the pot 2 can be discharged to the outside of the rice cooker. A steam temperature sensor (not shown) for detecting the temperature of steam is provided at any part of the steam discharge path from the inside of the pot 2 to the steam escape hole 9a.

The inner lid 4 is provided with a steam discharge hole 4a for discharging the steam in the pot 2 and a steam discharge hole 4b for communicating the inside of the pot 2 and the inside of the lid. The diameter of the steam discharge hole 4b is larger than the diameter of the steam discharge hole 4a, and is set to be, for example, twice or more the diameter of the steam discharge hole 4a. The diameter of the steam discharge hole 4a is, for example, 4 mm, and the diameter of the steam discharge hole 4b is, for example, 10 mm.

Further, the inner lid 4 is provided with a pressure suppression valve 10 capable of opening and closing the steam discharge hole 4a and a pressure valve 11 capable of opening and closing the steam discharge hole 4b.

The pressure suppression valve 10 is a valve that suppresses the pressure in the pan 2 from rising above a predetermined value (for example, 1.2 atm) higher than the atmospheric pressure. In the present embodiment, the pressure suppression valve 10 is composed of balls and closes the steam discharge hole 4a by its own weight. On the other hand, when the pressure in the pot 2 becomes larger than its own weight (for example, when it exceeds 1.2 atm), the pressure suppression valve 10 is pushed only by the pressure in the pot 2 and separates from the steam discharge hole 4a. , The steam discharge hole 4a is opened. The pressure suppression valve 10 may be composed of a closing member that closes the steam discharge hole 4a and a spring that urges the closing member so as to close the steam discharge hole 4a. According to this configuration, when the pressure in the pan 2 rises above a predetermined value higher than the atmospheric pressure, the closing member moves against the urging force of the spring due to the pressure, and the steam discharge hole 4a is opened.

The pressure valve 11 is configured to move between a closed position that closes the steam discharge hole 4b and an open position that opens the steam discharge hole 4b.

The outer lid 3 is provided with a pressure valve moving mechanism 12 that moves the pressure valve 11 between the closed position and the open position so as to open and close the steam discharge hole 4b. The pressure valve moving mechanism 12 is configured to press the pressure valve 11 with a pressure larger than a predetermined value (for example, 1.2 atm) to hold the pressure valve 11 in the closed position. As a result, the pressure in the pot 2 can be increased (for example, increased from 1.0 atm to 1.2 atm). Further, the pressure valve moving mechanism 12 controls the pressure valve 11 from the closed position by the control of the control unit 14, which will be described later, at a predetermined timing when the pressure in the pan 2 becomes a predetermined value (for example, 1.2 atm) or more. It is configured to move to the open position. As a result, the pressure in the pot 2 can be reduced (for example, reduced from 1.2 atm to 1.0 atm). Since the specific configuration of the pressure valve moving mechanism 12 is the same as that of the conventional pressure valve moving mechanism, description thereof will be omitted here.

In addition, various information such as rice cooking course and rice cooking time can be displayed on the outer lid 3, and a specific rice cooking course can be selected from a plurality of rice cooking courses such as white rice course, brown rice course, and white rice (soft) course. Display operation unit 13 is provided. Further, the display operation unit 13 is configured so that at least one cleaning course can be selected. The display operation unit 13 has a liquid crystal display 13A that displays various information such as a rice cooking course and a cleaning course, and a plurality of instructions for selecting a rice cooking course and a cleaning course, as well as executing start, cancellation, reservation, etc. of rice and cleaning. It has a button 13B. The user can select a specific rice cooking course or cleaning course by pressing the plurality of buttons 13B and instruct the start of rice cooking or cleaning while referring to various information displayed on the liquid crystal display 13A.

Further, a control unit 14 is mounted inside the rice cooker main body 1. The control unit 14 includes a storage unit that stores a plurality of rice cooking sequences for cooking rice. Here, the "rice cooking sequence" is a rice cooking in which the heating power, the heating time, the pressure valve driving time, etc. are predetermined in each step when the four steps of preheating, raising the temperature, maintaining boiling, and steaming are performed in order. Refers to the procedure of. Each rice cooking sequence corresponds to one of a plurality of rice cooking courses. The control unit 14 controls the pot bottom heating unit 5 and the pressure valve 11 (that is, the pressure valve moving mechanism 12) based on the rice cooking sequence corresponding to the rice cooking course selected by the display operation unit 13, and performs the rice cooking process. Run.

Further, the storage unit of the control unit 14 stores at least one cleaning sequence for cleaning the inside of the pot 2 and the inside of the lid. Here, the "cleaning sequence" refers to the heating power, heating time, open / closed state of the pressure valve 11, etc., which are determined in advance in each of the four steps of start-up heating, boiling maintenance, pressurization / depressurization, and termination. Refers to the cleaning procedure that has been performed. The control unit 14 controls the pot bottom heating unit 5 and the pressure valve 11 (that is, the pressure valve moving mechanism 12) based on the cleaning sequence corresponding to the cleaning course selected by the display operation unit 13, and performs the cleaning process. Run.

Next, the operation of the pressure-type rice cooker according to the present embodiment will be described. FIG. 3 shows the temperature inside the pot 2, the pressure inside the pot 2, the open / closed state of the pressure valve 11, and the pot bottom heating unit 5 when an example of the cleaning step is performed using the pressure type rice cooker according to the present embodiment. It is a graph which shows the relationship of heating power.

First, the user sets the pot 2 containing water in the pot storage unit 1a. After that, when the user instructs the start of cleaning after the cleaning course is selected by the display operation unit 13, the cleaning process is started under the control of the control unit 14. When the cleaning process is started, the start-up heating process is first started.

The start-up heating step is a step of boiling the water in the pot 2. In this start-up heating step, the control unit 14 supplies a high heating power WH to the pot bottom heating unit 5 until the detection temperature of the steam temperature sensor (not shown) reaches a predetermined temperature θ1 (for example, about 80 ° C.). Supply. Further, the control unit 14 controls the pressure valve 11 so as to open the steam discharge hole 4b during the start-up heating step so that the pressure in the pan 2 is close to the atmospheric pressure. When the detection temperature θ1 of the steam temperature sensor (not shown) reaches a predetermined temperature (for example, about 80 ° C.), the process proceeds to the boiling maintenance step. The time T0 required for the start-up heating step varies depending on the amount of water in the pot 2.

The boiling maintenance step is a step of maintaining the boiling state of the water in the pot 2. In this boiling maintenance step, the control unit 14 causes the pot bottom heating unit 5 to be lower than the heating power WH so that the detection temperature of the pot temperature sensor 6 maintains the temperature θ2 (for example, about 100 ° C.) which is the boiling point of water. Supply heating power WL. Further, the control unit 14 controls the pressure valve 11 so as to open the steam discharge hole 4b during the boiling maintenance step, and sets the pressure in the pot 2 to be near the atmospheric pressure. When a predetermined time T1 (for example, 15 minutes) elapses from the start of the boiling maintenance step, the process shifts to the pressurization / depressurization step.

The pressurizing / depressurizing step is a step of increasing and decreasing the pressure in the pot 2 to cause a plurality of bumping phenomena in the pot 2. In this pressurization / depressurization step, the control unit 14 supplies the pot bottom heating unit 5 with a heating power WM having a heating power WH or less and a heating power WM higher than the heating power WL. Further, the control unit 14 controls the pressure valve 11 so as to open and close the steam discharge hole 4b a plurality of times during the pressurization / depressurization step, and sets the pressure in the pan 2 to a predetermined pressure P1 (for example, 10 to 14 kPa). ) And lowers to atmospheric pressure (ie, 0 kPa). As a result, the pressure in the pot 2 fluctuates, and a bumping phenomenon occurs a plurality of times (for example, three times). When a predetermined time T2 (for example, 2 minutes) elapses from the start of the pressurization / depressurization step, the process shifts to the end step. In this pressurization / depressurization step, the pressure in the pot 2 becomes higher than the atmospheric pressure, so that the boiling point of the water in the pot 2 rises to the temperature θ3 (for example, about 105 ° C.). Therefore, the detection temperature of the pot temperature sensor 6 fluctuates between the temperature θ2 and the temperature θ3.

The ending step is a step of lowering the temperature inside the pot 2. In this end step, the control unit 14 stops the pot bottom heating unit 5. Further, the control unit 14 controls the pressure valve 11 so as to open the steam discharge hole 4b so that the pressure in the pot 2 is close to the atmospheric pressure. As a result, the temperature inside the pot 2 naturally drops. When a predetermined time T3 (for example, 2 minutes) elapses from the start of the end process, the end process is completed (that is, the cleaning process is completed). The time T3 is set based on, for example, the time when the temperature inside the pot 2 is assumed to be a temperature at which the pot 2 is not burned (for example, 60 ° C. or lower).

According to the pressure type rice cooker according to the present embodiment, the steam discharge hole 4b is opened in the start-up heating step and the boiling maintenance step to maintain the pressure in the pot 2 near the atmospheric pressure, and the steam discharge hole is maintained in the pressurization / depressurization step. It is configured to open and close 4b a plurality of times to increase and decrease the pressure in the pot 2. According to this configuration, in the start-up heating step and the boiling maintenance step, the steam discharge hole 4b is opened to maintain the pressure in the pot 2 near the atmospheric pressure, so that the steam is distributed to every corner and the pot 2 and the lid are covered. It is possible to make it easy to remove dirt and odorous components such as steam on the body. Further, by performing the pressurizing / depressurizing step in this state, dirt and odor components can be removed more reliably, and the cleanliness of the rice cooker can be improved.

Further, according to the pressure type rice cooker according to the present embodiment, the heating power WL supplied to the pot bottom heating unit 5 in the boiling maintenance step is higher than the heating power WH supplied to the pot bottom heating unit 5 in the rising heating step. It is configured to be low. According to this configuration, in the boiling maintenance step, it is possible to generate sufficient steam to remove dirt and odorous components such as sticks attached to the pot 2 and the lid. In addition, power consumption in the boiling maintenance step can be suppressed, and energy saving can be improved.

Further, according to the pressure type rice cooker according to the present embodiment, the heating power WM supplied to the pot bottom heating unit 5 in the pressurization / depressurization step is higher than the heating power WL supplied to the pot bottom heating unit 5 in the boiling maintenance step. It is configured to be. According to this configuration, the amount of steam generated can be increased, and pressurization and depressurization can be repeatedly executed in a short time. As a result, the time required for cleaning can be shortened.

Further, according to the pressure type rice cooker according to the present embodiment, the heating power WM supplied to the pot bottom heating unit 5 in the pressurizing / depressurizing step is equal to or less than the heating power supplied to the pot bottom heating unit 5 in the rising heating step. It is configured as follows. According to this configuration, it is possible to suppress unnecessary heating power in the pressurization / depressurization step and improve energy saving.

The time T0 required for the start-up heating step is the time for boiling the water in the pot 2, and it is difficult to shorten it. Further, the time T3 required for the final step T3 is a time for lowering the temperature of the water in the pot 2 to a temperature at which it does not cause burns, and it is difficult to shorten the time. On the other hand, the time T2 required for the pressurization / depressurization step can be shortened by making it easy to remove dirt and odor components by the boiling maintenance step. Therefore, the time T2 required for the pressurization / depressurization step is preferably shorter than the time T1 required for the boiling maintenance heating step. As a result, the time required for the entire cleaning process can be shortened.

The present invention is not limited to the above embodiment, and can be implemented in various other aspects. For example, in the above, when the detection temperature θ1 of the steam temperature sensor (not shown) reaches a predetermined temperature (for example, 80 ° C.) in the start-up heating step, the process shifts to the boiling maintenance step. The present invention is not limited to this. For example, when the detection temperature θ2 of the pot temperature sensor 6 reaches a predetermined temperature (for example, 100 ° C.) in the start-up heating step, the process may shift to the boiling maintenance step. Further, when a predetermined time has elapsed from the start of the start-up heating step, the process may shift to the boiling maintenance step.

Further, in the above description, in the start-up heating step, a constant heating power WH is supplied to the pot bottom heating unit 5, but the present invention is not limited to this. In the first half of the start-up heating step, it is preferable to supply high heating power to the pot bottom heating unit 5 in order to rapidly raise the temperature of the water in the pot 2. On the other hand, in the latter half of the start-up heating process, if high heating power is supplied to the pot bottom heating unit 5, there is a possibility that the circuit board on which the control unit 14 is mounted generates heat and the reliability is lowered. .. Therefore, for example, in the first half of the rising heating process, the heating power WH is supplied to the pot bottom heating unit 5, and in the latter half of the rising heating process, the heating power WH is lower than the heating power WH and the heating power WM is higher than the heating power WM. High heating power may be supplied. According to this configuration, heat generation of the circuit board can be suppressed. In addition, energy saving can be improved.

Further, in the above, the end process is completed when a predetermined time T3 elapses from the start of the end process, but the present invention is not limited to this. For example, the end step may be completed when the detection temperature of the pot temperature sensor 6 reaches a predetermined temperature (for example, 60 ° C.).

Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various modifications and modifications are obvious to those skilled in the art. It should be understood that such modifications and modifications are included therein, as long as they do not deviate from the scope of the invention according to the appended claims.

The pressure-type rice cooker according to the present invention can further improve the cleanliness of the rice cooker, and is therefore useful for, for example, home-use and commercial-use pressure-type rice cookers.

1 Rice cooker body 1A Hinge part 1a Pot storage part 1b Upper frame 1ba Cylindrical part 1bb Flange part 1bc Water tank storage part 1c Coil base 2 Pot 2a Flange part 3 Outer lid 3A Hinge shaft 3a Upper outer part member 3b Lower outer part 3d 3da Steam relief hole 4 Inner lid 4a, 4b Steam discharge hole 5 Pot bottom heating unit (heating part)
5a In-bottom heating coil 5b Out-of-bottom heating coil 6 Pot temperature sensor 7 Torsion coil spring 8 Lid opening device 8A Hook shaft 8B Lid opening button 9 Steam cylinder 9a Steam relief hole 10 Pressure suppression valve 11 Pressure valve 12 Pressure valve movement mechanism 13 Display Operation unit 13A Liquid crystal display 13B button 14 Control unit

Claims (4)

With a pot
A lid that opens and closes the opening of the pot,
The heating part that heats the pot and
A pressure valve that opens and closes a steam discharge hole that communicates between the inside of the pot and the inside of the lid.
A rising heating step of controlling the heating unit and the pressure valve to boil the water in the pot, a boiling maintenance step of maintaining the boiling state of the water in the pot, and increasing the pressure in the pot. And a control unit that performs a cleaning course including a step of reducing the pressure and pressure.
In the start-up heating step and the boiling maintenance step, the control unit controls the pressure valve so as to open the steam discharge hole so that the pressure in the pot is close to the atmospheric pressure, and the pressurization / depressurization step. In the pressure type rice cooker, the pressure valve is controlled so as to open and close the steam discharge hole a plurality of times to raise and lower the pressure in the pot. The first aspect of the present invention, wherein the control unit controls the heating power supplied to the heating unit in the boiling maintenance step so as to be lower than the heating power supplied to the heating unit in the rising heating step. Pressure type rice cooker. The first or second aspect of the present invention, wherein the control unit controls the heating power supplied to the heating unit in the pressurization / depressurization step to be higher than the heating power supplied to the heating unit in the boiling maintenance step. Pressure type rice cooker. Any of claims 1 to 3, wherein the control unit controls so that the heating power supplied to the heating unit in the pressurization / depressurization step is equal to or less than the heating power supplied to the heating unit in the start-up heating step. The pressure type rice cooker described in one.

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