JP2012161544A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker capable of cooking delicious rice having sweetness.SOLUTION: A lid body 3 for covering an opening 1f of a body 1 of a rice cooker, includes an inner lid 4 arranged below lid heating means 11 for heating an upper layer part of a pot 2. Above the inner lid 4, a steam tube 16 having a steam tube air intake port 26 and communicating with the upper part of the pot 2, a steam tube storing part 15 with an exhaust port 19 for exhausting steam during cooking rice to air while storing the steam tube 16, a blower 20, an air intake port 21 for taking air provided on an outer shell of the lid body 3, an intake air path 22 for connecting the blower 20 and the air intake port 21, a blowing connecting tube A23 for connecting the blower 20 and the steam tube air intake port 26, a blowing connecting tube B25 for connecting the blower 20 and the upper part of the pot 2, and a blowing direction switching valve 24 for switching the blowing connecting tube A23 to the blowing connecting tube B25 are provided. The blowing direction switching valve is switched to the blowing connecting tube A23 side and air with low temperature is taken in the steam tube 16 by the blower 20 to prevent glutinousness from increasing and boiling over without reducing the heating power to heat the pot for cooking rice.

Description

  The present invention relates to a rice cooker that cooks rice deliciously.

  In recent years, expensive rice cookers have been introduced in the market, and among them, functions aimed at improving rice cooking performance and heat retention performance, which are basic performances as a rice cooker, have been commercialized as added value. As a conventional rice cooker, there exists what is shown by FIG. 7 (for example, refer patent document 1).

  FIG. 7 is a cross-sectional view of a conventional rice cooker.

  In FIG. 7, a rice cooker main body 41 (hereinafter referred to as “main body 41”) contains a pan 42, a pan heating means 43 for heating the pan 42, and power for supplying power to the pan heating means 43. A pan temperature detecting means 45 for detecting the temperature of the heating control means 44 and the pan 42 is provided.

  Above the main body 41 and the pan 42, a lid body 46 is disposed so as to be openable and closable. The lid body 46 is provided with an outer lid 47 of the exterior portion and a heating plate 48 for heating the upper portion of the pan 42. A steam path 49 is provided between the outer lid 47 and the heating plate 48 to communicate the outline of the outer lid 47 and the pan 42.

  The steam path 49 is provided with steam detection means 50, and a steam cylinder for preventing the spilling of the rice cake generated in the pot 42 during cooking rice is disposed in the upper part of the steam path 49. Absent.

  Next, the operation | movement at the time of rice cooking of the conventional rice cooker comprised as mentioned above is demonstrated.

  When cooking rice is started, the pan 42 is heated by the pan heating means 43, and the cooked food (not shown) in the pan 42 boils. In this process, the pan temperature detecting means 45 first detects the temperature of the pan 42, but when the amount of the cooked food in the pan 42 is large, the cooked food is heated later than the pan 42. It takes time from when the means 45 detects that the boiling point of water reaches 100 ° C. until the steam detecting means 50 detects that the boiling temperature has been reached.

  This time is proportional to the amount of cooked rice, and the amount of cooked rice is determined based on this proportional relationship, and the cooking of the proper pan 42 according to the amount of cooked rice can be performed.

  Moreover, in the process of cooking rice, rice balls that are large amounts of boiled rice in the pan 42 are generated from the end of the determination of the amount of cooking to the process of cooking. In this process, when the pan 42 is heated by the pan heating means 43, the gulp and rice bowl reach the upper portion of the pan 42, further reach the inside of the steam path 49, and overflow to the outside of the outer lid 47.

  Although this phenomenon is blown down, since the steam detection means 50 is disposed in the steam path 49, when the rice cake reaches the steam path 49, the steam detection means 50 is used to The temperature of the stick is detected, and heating of the pan 42 by the pan heating means 43 is stopped to prevent spilling.

JP 2001-211999 A

  When the amount of water to be cooked is large, the amount of rice generated during rice cooking becomes great, but in the above-mentioned conventional rice cooker configuration, in the cooking process in that state, Since the rice cake rises vigorously into the steam path 58, when the rise of the rice cake due to temperature detection is detected by the steam detection means 50, a slight spillage may occur in the outline of the outer lid 47. . Therefore, in order to prevent the spilling, there is a problem that the rice is not sweet and not delicious to cook rice with less heating by the pan heating means 43.

  This invention is for solving the said conventional subject, and it aims at providing the rice cooker which can cook sweet and delicious rice, when there is much quantity of the water to cook.

  In order to solve the above-described conventional problems, the rice cooker of the present invention includes a rice cooker body having a pan storage unit, a pan stored in the pan storage unit, a pan heating means for heating the pan, and the rice cooker. A lid body covering the opening of the container body, the lid body having a lid heating means for heating the upper layer portion of the pan, and an inner lid disposed below the lid heating means, the inner lid Several steam ports are arranged in the upper part of the inner lid, and a steam cylinder communicating with the upper part of the pan and having a steam cylinder intake hole and a steam cylinder storage part for storing the steam cylinder are arranged at the upper part of the inner lid. The steam tube storage part is provided with an exhaust hole for discharging steam generated during rice cooking to the outside air, a blower is provided in the vicinity of the steam tube storage part, and the outer surface of the lid body Is provided with an intake port for performing intake of the blower, and an intake path for connecting the blower and the intake port; A blower connecting pipe A that connects the blower and the steam cylinder intake hole, a blower connecting pipe B that connects the blower and the upper part of the pan, and a blowing direction switch that switches the blower connecting pipe A and the blower connecting pipe B. With a valve, rice cooking is started, and the water in the pan is heated and boiled by the pan heating means. Then, boil is maintained and the pan is heated until there is no water in the pan. At that time, while maintaining boiling, the rice ball rises to the top of the pan, rises to the steam path and steam cylinder in the lid body, and if it continues to heat, the rice cake blows down into the outer part of the lid body. End up. Therefore, by switching the blowing direction switching valve to the blowing connection pipe A side, with the blower provided in the lid body, the air having a lower temperature is sucked into the steam cylinder, and the air is put into the steam cylinder to maintain the boiling. It suppresses the rise of the rice bowl that has risen up to the inside of the steam cylinder, prevents spilling, and since there is no spilling, rice can be cooked with a large amount of heat by the pan heating means, so sweet and delicious You can cook rice. Furthermore, because the air connection pipe B is connected to the pan, the air direction switching valve is switched to the air connection pipe B during the heat insulation, the blower disposed in the lid body is operated, and the outside air is introduced into the pot. To do. The inside of the hot pot is filled with water vapor, and if there is a temperature below the dew point of water vapor at the temperature of the pan and inner lid, condensation will occur at that location and the water drops will drop on the rice. The rice becomes hot and can't be eaten, but by putting outside air into the pan, the absolute humidity in the pan is reduced, the amount of condensation on the pan and the inner lid is reduced, and the rice swells. There is an effect to suppress, and has the aim of maintaining the cooked rice in heat insulation. As described above, the greatest effect of the present invention is that the structure of one blower in the lid body is an effect of cooking sweet and delicious rice while preventing spilling of cooked rice, and a pot for keeping warm. It has the two functions of preventing the dew condensation on the lid and eliminating the swell of rice, and is capable of realizing a low-cost configuration.

According to the rice cooker of the present invention, the blower disposed in the lid body sucks in air having a lower temperature than that, and throws the air into the steam cylinder to rise into the steam cylinder while maintaining boiling. Because it prevents the spilling and prevents the spilling, the rice can be cooked with a great amount of heat by the pan heating means, so you can cook delicious sweet rice . Further, since the blower connecting pipe B is connected to the pan, the air blower disposed in the lid body is operated during the heat insulation, and the outside air is introduced into the pan. The inside of the hot pot is filled with water vapor, and if there is a temperature below the dew point of water vapor at the temperature of the pan and inner lid, condensation will occur at that location and the water drops will drop on the rice. The rice becomes hot and can't be eaten, but by putting outside air into the pan, the absolute humidity in the pan is reduced, the amount of condensation on the pan and the inner lid is reduced, and the rice swells. The main purpose of the present invention is the configuration of one blower in the lid body, and it is sweet and delicious while preventing the rice from blowing down. There are two functions, that is, the effect of cooking rice and the prevention of dew condensation on the pan and the inner lid in heat insulation, and the low cost configuration can be realized.

The longitudinal cross-sectional view of the rice cooker concerning Embodiment 1 of this invention. Partial top view of the rice cooker The figure which shows the drive state of the temperature change of a pan in a rice cooking process of the rice cooker, and a heating apparatus (a pan heating means and a lid heating means). The longitudinal cross-sectional view of the rice cooker concerning Embodiment 2 of this invention. The longitudinal cross-sectional view of the rice cooker concerning Embodiment 3 of this invention. Partial top view of the rice cooker Vertical section of a conventional rice cooker

  1st invention has the rice cooker main body which has a pan accommodating part, the pan accommodated in the said pot accommodating part, the pan heating means which heats the said pan, and the lid | cover main body which covers the opening part of the said rice cooker main body. The lid body has a lid heating means for heating the upper layer portion of the pan, and an inner lid arranged at the lower part of the lid heating means, and several steam ports are arranged in the inner lid. The upper part of the inner lid is provided with a steam cylinder communicating with the upper part of the pan and having a steam cylinder intake hole, and a steam cylinder storage part for storing the steam cylinder, An exhaust hole for discharging water vapor generated during rice cooking to the outside air is disposed, a blower is disposed in the vicinity of the steam tube housing portion, and an air intake for performing intake of the blower on the outer surface of the lid body An inlet is provided, an intake path for connecting the blower and the intake port, and the blower and the steam cylinder intake hole are connected. The blast connecting pipe A, the blast connecting pipe B for connecting the blower and the upper part of the pan, and the blast direction switching valve for switching the blast connecting pipe A and the blast connecting pipe B are arranged. The water in the pan is heated up and boiled by the pan heating means. Then, boil is maintained and the pan is heated until there is no water in the pan. At that time, while maintaining boiling, the rice ball rises to the top of the pan, rises to the steam path and steam cylinder in the lid body, and if it continues to heat, the rice cake blows down into the outer part of the lid body. End up. Therefore, by switching the blowing direction switching valve to the blowing connection pipe A side, with the blower provided in the lid body, the air having a lower temperature is sucked into the steam cylinder, and the air is put into the steam cylinder to maintain the boiling. It suppresses the rise of the rice bowl that has risen up to the inside of the steam cylinder, prevents spilling, and since there is no spilling, rice can be cooked with a large amount of heat by the pan heating means, so sweet and delicious You can cook rice. Furthermore, because the air connection pipe B is connected to the pan, the air direction switching valve is switched to the air connection pipe B during the heat insulation, the blower disposed in the lid body is operated, and the outside air is introduced into the pot. To do. The inside of the hot pot is filled with water vapor, and if there is a temperature below the dew point of water vapor at the temperature of the pan and inner lid, condensation will occur at that location and the water drops will drop on the rice. The rice becomes hot and can't be eaten, but by putting outside air into the pan, the absolute humidity in the pan is reduced, the amount of condensation on the pan and the inner lid is reduced, and the rice swells. There is an effect to suppress, and has the aim of maintaining the cooked rice in heat insulation. As described above, the greatest effect of the present invention is that the structure of one blower in the lid body is an effect of cooking sweet and delicious rice while preventing spilling of cooked rice, and a pot for keeping warm. It has the two functions of preventing the dew condensation on the lid and eliminating the swell of rice, and is capable of realizing a low-cost configuration.

  In the second invention, in particular, the inside of the steam cylinder of the first invention is configured with a heat exchange part in which fins that increase the surface area with a metal having high heat conductivity are arranged. By spraying the air sucked by the blower onto the fins when the screw has risen, there is no temperature rise of the heat exchange part, and the use of the heat capacity of the heat exchange part and the total heat capacity of the air, It can suppress the rise of rice balls, can maintain the heating of the pot by the pot heating means in maintaining boiling of the cooked rice, and can cook delicious sweet rice with sweetness.

  In the third invention, in particular, a metal path is built in the intake path of the first or second invention, and a heat exchanger such as Peltier is arranged in the metal path, and the intake air is taken in by a blower in the lid body. The effect of cooking the sweet and delicious rice by throwing the air into the steam cylinder, suppressing the rise of the rice bean that rises during cooking, maintaining the heating of the pot by the pot heating means while maintaining boiling The same, but in the four seasons in Japan, the temperature of the outside air generally changes from -5 ° C to 35 ° C, and when the outside air is sucked in at 35 ° C, the amount of water in the pot There is a risk that it will be blown when a customer's setting mistake occurs. For this purpose, a metal path is built in the intake path that connects the blower installed in the lid body and the intake port of the lid body, and a heat exchanger such as Peltier is installed in the metal path, thereby enabling outdoor air in summer. Even if the temperature reaches 35 ° C., the blower once sucks the outside air of 35 ° C., and when the intake air passes through the metal path, the temperature of the metal path is lowered to reduce the temperature of the air. By lowering the temperature to a level where it does not occur and putting it into the steam cylinder, it is possible to cook rice with a great amount of heat without being affected by the temperature of the outside air and without being blown down. In addition, when the outside air is -5 ° C, if the low temperature air is put into the pan, the condensation of the pan and the inner lid can be prevented, but the temperature of the pan and the inner lid and even the rice can be lowered. Therefore, when the outside air temperature is low, when the low-temperature air sucked by the blower passes through the metal path, the temperature of the metal path is raised and the air that is put into the pan The temperature of the pan, the inner lid, and even the temperature of the rice can be prevented from decreasing, and the power consumption for heat retention when the outside air is low can be reduced, thereby realizing an energy-saving rice cooker.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a rice cooker according to Embodiment 1 of the present invention, and FIG. 2 is a partially cut-out top view of the rice cooker.

  In FIG. 1, 2, the rice cooker concerning this Embodiment is the substantially bottomed cylindrical rice cooker main body 1 in which the pan accommodating part 1a was formed, the pan 2 accommodated in the pan accommodating part 1a, A lid body 3 that is attached to the rice cooker body 1 so that the opening 1f of the rice cooker body 1 can be opened and closed, and a lid 2 that is detachably attached to the inside of the lid body 3 (the side that covers the opening 2a of the pan 2). A substantially disc-shaped inner lid 4 capable of sealing the opening 2a of the slab, and a pan heating means 5 for heating (induction heating) the pan 2.

  The pot storage portion 1 a of the rice cooker body 1 is formed in a bottomed cylindrical shape corresponding to the shape of the substantially annular upper frame 1 b fitted into the inner periphery of the upper opening of the rice cooker body 1 and the pot 2. The coil base 1c is integrally connected to the upper frame 1b at the upper opening side end.

  An inner bottom heating coil 5a and an outer bottom heating coil 5b constituting the pot heating means 5 are attached to the outer peripheral surface of the coil base 1c. The bottom heating coil 5a is arranged so as to face the periphery of the center of the bottom of the pan 2 via the coil base 1c, and the outside bottom heating coil 5b is a corner of the bottom of the pan 2 via the coil base 1c. It arrange | positions so that a part may be opposed.

An opening is provided in the central portion of the bottom of the coil base 1c. A pan temperature sensor 6, which is an example of a pan temperature detection unit for measuring the temperature of the pan 2, is disposed in the opening portion so as to be able to contact the bottom of the pan 2.

  In the rice cooker main body 1, a control unit 7 for performing rice cooking by driving and controlling each unit and each device is installed. The control unit 7 performs drive control of each unit and each device in accordance with a user instruction performed using an operation unit 8 (described later) provided on the lid body 3.

  A hook 1 d that can be engaged with the hook 9 of the lid body 3 is provided on the upper part of the front wall of the rice cooker body 1 (upper left side in FIG. 1). A spring 1e is provided between the hook 1d and the upper frame 1b. The hook 1d is always urged forward (left side in FIG. 1) by a spring 1e.

  The lid body 3 is provided with an inner lid temperature sensor 10, which is an example of an inner lid temperature detector, a lid heating means 11, and a hinge shaft 12. The inner lid temperature sensor 10 is provided so as to be able to contact the inner lid 4 and is configured to be able to detect the temperature of the inner lid 4.

  The lid heating means 11 is composed of a heating coil arranged in the lid body 3 so as to face the upper opening of the pan 2 through the inner lid 4, and the inner lid 4 is induction-heated under the control of the control unit 7. To do. The hinge shaft 12 is an opening / closing shaft of the lid main body 3, and both ends of the hinge shaft 12 are rotatably supported by the upper frame 1 b of the rice cooker main body 1. The lid body 3 is urged in a direction to rotate away from the upper opening of the rice cooker body 1 by a rotating spring (not shown) such as a torsion coil spring provided in the vicinity of the hinge shaft 12.

  A part of the inner lid 4 is made of a metal such as ferritic stainless steel capable of induction heating. In order to discharge the steam generated in the pot 2 to the outside of the pot 2, the inner lid 4 is provided with a steam port 4a composed of a plurality of holes. A substantially annular pan packing 13 that is in close contact with the pan 2 when the lid main body 3 is in a closed state is attached to the surface of the outer peripheral portion of the inner lid 4 on the pan 2 side. The pot packing 13 is made of an elastic body such as rubber.

  The lid body 3 has a display unit 14 including a liquid crystal display for displaying various information such as a rice cooking menu and a rice cooking time, and instructions for selecting a rice cooking menu, starting rice cooking, canceling, and executing reservations. An operation unit 8 is provided.

  The operation unit 8 includes a plurality of buttons (not shown) such as a rice cooking start button. The user can cook rice by instructing the start of cooking with the operation unit 8 while referring to the display content of the display unit 14. The control unit 7 that has received an instruction to start cooking rice controls (drives) the pot heating unit 5 and the lid heating unit 11 based on the stored rice cooking program and the detected temperatures of the pan temperature sensor 6 and the inner lid temperature sensor 10. (Or stop) and execute the rice cooking process.

  Further, the lid main body 3 is provided with a steam cylinder storage portion 15 for exhausting the water vapor in which the water in the pan 2 is boiled to the outside air. A steam cylinder 16 is disposed in the steam cylinder housing portion 15, and a steam cylinder hole A <b> 17 through which rice balls and steam generated during rice cooking pass is disposed in the steam cylinder 16. In addition, a steam cylinder hole 18 through which only the steam passes is provided in the upper part of the steam cylinder 16 at the upper part of the steam cylinder housing 15. Further, an exhaust hole 19 for releasing water vapor to the outside air is disposed on the upper surface portion of the steam tube storage portion 15.

  Next, a blower 20 is disposed in the vicinity of the steam tube storage portion 15, and an intake port 21 for intake of the blower 20 is disposed on the outer surface of the lid body 3. An air intake path 22 is provided to connect the blower 20 and the air inlet 21. And in order to connect the air blower 20 and the steam pipe | tube storage part 15, the air supply connection pipe | tube A23 is arrange | positioned, and the said air supply connection pipe | tube A23 connects the air blower 20 and the pan 2 via the air supply direction switching valve 24. B25 is also provided.

  On the upper surface portion of the steam cylinder 16, a steam cylinder intake hole 26 through which the air sucked by the blower 20 and sent to the blower connection pipe A 23 is introduced into the steam cylinder 16 is provided. In addition, in order to connect the steam cylinder intake hole 26 and the blower connection pipe A 23, a connection packing 27 is disposed in the vicinity of the steam cylinder intake hole 26 on the upper surface portion of the steam cylinder 16. With such a configuration of the steam cylinder 16, the steam cylinder 16 can be configured to be detachable from the lid body 3.

  Next, the operation of the rice cooker according to the present embodiment will be described with reference to FIGS. 1 and 3. FIG. 3 is a diagram showing a temperature change of the pan in the rice cooking process and a driving state of the heating device (the pan heating means 5 and the lid heating means 11).

  First, when rice and water are set in the pan 2 by the user and the rice cooking menu is selected by the operation unit 8, when the start of rice cooking is instructed, the rice cooking process is started by the control of the control unit 7. .

  Here, the rice cooking step is mainly composed of four steps of a pre-cooking step (also referred to as an immersion step), a temperature raising step (also referred to as a cooking step), a boiling maintenance step, and a steaming step. . During these steps, gelatinization of rice is promoted and rice is cooked.

  In this rice cooking step, the controller 7 controls the heating operation of the pot heating means 5 and the lid heating means 11 according to the detected temperature of the pot temperature sensor 6 and the inner lid temperature sensor 10 and the rice cooking program corresponding to the rice cooking menu. Is done. In this Embodiment, the some rice cooking menu is prepared according to the kind of rice, etc., and the rice cooking program according to the said each rice cooking menu is memorize | stored in the control part 7. FIG.

  When the rice cooking process is started, first, the pre-cooking process is started. The pre-cooking process is a process in which the rice is absorbed by keeping the water at a constant temperature. In this pre-cooking process, the control unit 7 controls the temperature of the pan 2 so that the temperature of the water in the pan 2 does not become higher than the temperature at which gelatinization of rice begins (about 60 ° C.) or higher. Based on the detected temperature of the sensor 10, the pan heating means 5 and the lid heating means 11 are controlled. Thereby, water absorption of rice is promoted.

  When a preset time has elapsed from the start of the pre-cooking process, the process proceeds to the temperature raising process. The temperature raising step is a step in which the pot 2 is heated at once by the pot heating means 5 and the lid heating means 11 to bring the water in the pot 2 into a boiling state (about 100 ° C.). In this temperature raising step, the controller 7 controls the driving of the pot heating means 5 and the lid heating means 11 so that the pot 2 is rapidly ripened to bring the water in the pot 2 into a boiling state.

  When the temperature detected by the pan temperature sensor 6 reaches about 100 ° C. by performing the temperature raising step, the process proceeds to the boiling maintaining step. The boiling maintaining step is a step of gelatinizing rice starch to raise the degree of gelatinization to about 60%. In this boiling maintenance step, the controller 7 controls the pan heating means 5 and the lid heating means 11 so as to maintain the boiling state of the water in the pot 2. More specifically, the control unit 7 performs duty control that repeats driving and stopping of the pot heating unit 5 and the lid heating unit 11 at regular time intervals, and intermittently heats the pot 2.

  In this temperature raising step, water is continuously boiled, so that a large amount of water vapor and a bowl of about 100 ° C. are generated. When the inside of the pan 2 is filled with the generated steam and rice bowl, the excess steam and rice cake passes through the steam port 4 a of the inner lid 4 and flows into the steam cylinder 16. At this time, the blower 20 disposed in the lid body 3 is operated to take in outside air.

The sucked outside air is introduced into the steam cylinder 16 through the air blowing connection pipe A23 and is lower than the temperature of the water vapor and the rice bowl, so that the water and the steam are completely separated and only the water vapor is disposed in the steam cylinder 16. Then, the steam is discharged from the steam cylinder hole 18, sent to the upper part of the steam cylinder housing 15, passes through the exhaust hole 19, and discharges water vapor to the outside air.

  Therefore, the blower 20 disposed in the lid main body 3 suppresses the rise of the bowl that has risen up to the inside of the steam cylinder 16 while maintaining boiling, prevents the blow-out and prevents the blow-out, and the pot heating means 5 Because you can cook rice with a great amount of heat, you can cook delicious sweet rice.

  Furthermore, in the structure of the rice cooker in this Embodiment, since the ventilation | gas_flowing connection pipe B25 is connected with the pan 2, the ventilation direction switching valve 24 is switched to the ventilation | gas_flowing connection pipe B25 side during heat insulation, and it is in the lid | cover main body 3. By operating the arranged blower 20, outside air is introduced into the pot 2. The inside of the hot pot 2 is filled with steam of rice, and if there is a spot below the dew point of the steam at the temperature of the pot 2 and the inner lid 4, dew condensation will occur at that spot, and the water drops The amount of dew that adheres to the pan 2 and the inner lid 4 is reduced by dripping the water into the pan 2 to make it impossible to eat. It has the effect of reducing the swelling phenomenon of rice, and has the aim of keeping the cooked rice warm.

  As described above, the greatest effect of the present invention is that the composition of one blower 20 in the lid body 3 has the effect of cooking sweet rice with sweetness while preventing spilling of cooked rice, and the pot 2 for keeping warm. There are two functions of preventing the dew condensation of the inner lid 4 and eliminating the swell of rice, so that a low-cost configuration can be realized.

(Embodiment 2)
FIG. 4: has shown the longitudinal cross-sectional view of the rice cooker concerning Embodiment 2 of this invention. In addition, about the same component as the rice cooker in the said embodiment, the description is abbreviate | omitted using the same code | symbol.

  The structure of the lid body 3 of the rice cooker in the present embodiment is a heat in which fins (not shown) that increase the surface area with a metal having high thermal conductivity are arranged inside the steam cylinder 16 described in the first embodiment. The exchange unit 28 is used. Between the fins of the heat exchanging portion 28, a hole 29 for sending water vapor to the upper side of the steam tube storage portion 15 is provided.

  As mentioned above, in the rice cooker in this Embodiment, since the heat exchange part 28 which arrange | positioned the fin which increases a surface area with the metal with high heat conductivity was provided in the inside of the steam pipe | tube 16, during rice cooking When the rice bowl rises to the inside of the steam cylinder 16, the air sucked by the blower 20 is sprayed onto the fins.

  As an effect of this, there is no temperature rise of the heat exchanging unit 28, and the increase in the size of the rice cooker can be suppressed by the use of the heat capacity of the heat exchanging unit 28 and the total heat capacity of the air, compared to the configuration of the rice cooker in the first embodiment. It is possible to maintain the heating of the pot 2 by the pot heating means 5 in maintaining boiling of the cooked rice and cook delicious sweet rice with sweetness. About the effect of heat retention, the same effect as the first embodiment can be obtained.

(Embodiment 3)
FIG. 5: is a longitudinal cross-sectional view of the rice cooker concerning Embodiment 3 of this invention, FIG. 6: is a partially notched top view of the rice cooker. In addition, since the basic composition of the rice cooker in this Embodiment is the same as that of the rice cooker in the said embodiment, about the same component, the description is abbreviate | omitted using the same code | symbol.

In the configuration of the lid body 3 of the rice cooker in the present embodiment, a metal path 30 is built in the intake path 22, and a heat exchanger 31 such as Peltier is disposed in the metal path 30.

  By configuring the rice cooker in the present embodiment as described above, the air sucked by the blower 20 in the lid body 3 is introduced into the steam cylinder 16 and the rice cooker rises during rice cooking. Although the effect of suppressing the rise and maintaining the heating of the pot 2 by the pot heating means 5 while maintaining boiling and cooking delicious sweet rice with the sweetness is the same, the temperature of the outside air is generally -5 in the four seasons in Japan. It varies from 0C to 35C.

  Due to the four seasons, when the outside air is sucked at 35 ° C., there is a risk that the amount of water in the pan 2 will be blown down when a customer's setting error occurs. For this purpose, a metal path 30 is built in the intake path 22 connecting the blower 20 disposed in the lid body 3 and the intake port 21 of the lid body 3, and a heat exchanger 31 such as Peltier is disposed in the metal path 30. Thus, even if the outside air temperature in summer reaches 35 ° C., the blower 20 once sucks the outside air at 35 ° C., and when the sucked air passes through the metal path 30, the heat exchanger 31 such as Peltier is used. Thus, the temperature of the metal path 30 is lowered, the temperature of the air is lowered to a temperature at which no blown-off occurs, and it is introduced into the steam cylinder 16 so that the blown-out occurs without being affected by the temperature of the outside air. Without cooking, it becomes possible to cook rice with a great amount of heat.

  In addition, when the outside air is −5 ° C. in the heat insulation, if the low temperature air is introduced into the pan 2, the dew condensation between the pan 2 and the inner lid 4 can be prevented, but the pan 2 and the inner lid 4, and even rice Therefore, when the outside air temperature is low, when the low-temperature air sucked by the blower 20 passes through the metal path 30, the heat exchanger 31 such as Peltier When the temperature of the metal path 30 is raised and the temperature of the air introduced into the pan 2 is raised to prevent the pan 2 and the inner lid 4 and further the temperature of the rice from falling, the outside air is low. Power consumption for heat insulation can be reduced, and an energy-saving rice cooker can be realized.

  In addition, even if it uses a pump, a fan, etc. as the air blower 20 in the said Embodiment 1-3, the same effect can be acquired.

  The rice cooker according to the present invention, which uses a blower, can suppress the spilling of cooked rice, can cook rice deliciously and prevent the rice from spreading during heat insulation, and is applicable to various rice cookers for home use and business use it can.

DESCRIPTION OF SYMBOLS 1 Rice cooker main body 1a Pan accommodating part 2 Pan 3 Lid main body 4 Inner lid 4a Steam port 5 Pan heating means 11 Lid heating means 15 Steam cylinder accommodating part 16 Steam cylinder 20 Blower 21 Intake port 22 Intake route 23 Blower connection pipe A
24 Blower direction switching valve 25 Blower connection pipe B
26 Steam Cylinder Air Intake Hole 27 Connection Packing

Claims (3)

A rice cooker body having a pot storage unit, a pot stored in the pot storage unit, a pan heating means for heating the pan, and a lid body covering an opening of the rice cooker body, the lid body A lid heating means for heating the upper layer portion of the pan; and an inner lid disposed at a lower portion of the lid heating means, wherein the inner lid is provided with several steam ports, and an upper portion of the inner lid. Is provided with a steam cylinder communicating with the upper part of the pan and having a steam cylinder intake hole, and a steam cylinder storage section for storing the steam cylinder, and the steam cylinder storage section includes water vapor generated during rice cooking. An exhaust hole for discharging the air to the outside air is disposed, a blower is disposed in the vicinity of the steam tube housing portion, and an intake port for performing intake of the blower is disposed on the outer surface of the lid body. An intake path for connecting the blower and the intake port, and a blower connection pipe for connecting the blower and the steam tube intake hole If, cooker which is arranged a blower connecting pipe B, the blowing direction switching valve for switching the blower connecting pipe B and the blower connection pipe A for connecting the upper portion of the pot and the air blower. 2. The rice cooker according to claim 1, wherein a heat exchanging portion in which fins that increase a surface area with a metal having high heat conductivity are disposed inside the steam cylinder. The rice cooker according to claim 1 or 2, wherein a metal path is built in the intake path, and a heat exchanger such as Peltier is disposed in the metal path.