JP6838307B2 - rice cooker - Google Patents

Description

The present invention relates to a rice cooker.

A conventional rice cooker is provided with a main body having a lid on the upper part, a pot provided in the main body, and a heating means for heating the pot, and a weight sensor for detecting the weight of the pot is provided. It is known that a water supply tank is provided on the lid, the weight of the pot containing the washed rice is detected by a weight sensor, and the amount of water corresponding to the detected weight is supplied from the water supply tank into the pot. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 09-098884

However, when the user uses rice after washing with water, the weight of the pot containing the rice after washing is "pot", "dried rice before washing", and "by washing rice". It is the total weight with "remaining water" (water absorbed by the rice during washing and water remaining attached to the rice even after the draining operation after washing the rice). Of these, the weight of the pot is almost constant. However, if a measuring cup that is generally used when weighing rice is used, the weight of "dried rice before washing" varies every time the rice is cooked. In addition, if a colander or a bowl, which is generally used for washing rice, is used, the weight of "water remaining after washing rice" also varies every time the rice is cooked.

Therefore, in the conventional rice cooker shown in Patent Document 1, the accurate weight of "dried rice before washing" is determined from the detected weight of the pot containing the washed rice. It is not possible to accurately determine the amount of water suitable for cooking the amount of rice. That is, it is not possible to cook rice with an appropriate amount of water according to the state of the rice after washing, and the cooked condition is not stable every time the rice is cooked, and the rice tends to vary.

Even if the same weight of "dried rice before washing" is used, the optimum amount of water varies depending on the rice variety, the dry state, and the like. The conventional rice cooker shown in Patent Document 1 does not take this point into consideration, and cannot cook rice with an appropriate amount of water depending on the rice variety, the dry state, and the like.

The present invention has been made to solve such a problem, and is a rice cooker capable of cooking rice with an appropriate amount of water according to the state of rice after washing, the type of rice, the dry state, and the like. What you get.

Cooker according to the present invention comprises a pot-shaped container for accommodating an object to be heated containing food and water, and heating means for heating the pot-shaped container, a water supply means for supplying water to the pot-shaped container, wherein The water supply means includes a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means supplies water by the first amount when the temperature of the pot-shaped container is the first temperature, and the temperature of the pot-shaped container. Is not supplied with water when the temperature is lower than the first temperature, and when the temperature of the pot-shaped container is lower than the first temperature and higher than the second temperature, the third temperature is higher than the first temperature. Water is supplied only by the second amount of water, which is less than the amount of water of 1 .
Alternatively, the rice cooker according to the present invention includes a pot-shaped container for accommodating foodstuffs and an object to be heated containing water, a heating means for heating the pot-shaped container, and a water supply means for supplying water into the pot-shaped container. The water supply means is provided with a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means is used before boiling of the water in the pot-shaped container and when the temperature of the pot-shaped container is the first temperature. , The amount of water supplied before boiling is set in advance, and after boiling the water in the pot-shaped container, and when the temperature of the pot-shaped container is the first temperature, the amount of water supplied before boiling is smaller than the amount of water supplied before boiling. Water is supplied by the amount of water supplied after boiling, which is preset to the amount of water, and is not supplied when the temperature of the pot-shaped container is a second temperature lower than the first temperature.
Alternatively, the rice cooker according to the present invention includes a pot-shaped container for accommodating foodstuffs and an object to be heated containing water, a heating means for heating the pot-shaped container, and a water supply means for supplying water into the pot-shaped container. The water supply means is provided with a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means is after the boiling of the water in the pot-shaped container and before a preset reference time elapses after the boiling. In addition, when the temperature of the pot-shaped container is the first temperature, water is supplied by the preset reference time before the water supply amount, and after the reference time has elapsed from the boiling of the water in the pot-shaped container. In addition, when the temperature of the pot-shaped container is the first temperature, water is supplied to a water amount smaller than the water supply amount before the reference time by a preset reference time after the water supply amount, and the temperature of the pot-shaped container becomes higher. Water is not supplied when the second temperature is lower than the first temperature.
Alternatively, the rice cooker according to the present invention includes a pot-shaped container for accommodating foodstuffs and an object to be heated containing water, a heating means for heating the pot-shaped container, and a water supply means for supplying water into the pot-shaped container. The water supply means is provided with a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means is after the boiling of the water in the pot-shaped container and before a preset reference time elapses after the boiling. In addition, when the temperature of the pot-shaped container is the first temperature, water is supplied by the preset reference time before the water supply amount, and after the reference time has elapsed from the boiling of the water in the pot-shaped container. Does not supply water,
Water is not supplied when the temperature of the pot-shaped container is a second temperature lower than the first temperature.
Alternatively, the rice cooker according to the present invention includes a pot-shaped container for accommodating foodstuffs and an object to be heated containing water, a heating means for heating the pot-shaped container, and a water supply means for supplying water into the pot-shaped container. The water supply means is provided with a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means is provided before the elapse of a preset reference time after the start of heating of the heating means and the temperature of the pot-shaped container. When is the first temperature, water is supplied by the amount of water supplied before the preset reference time, and after the reference time has elapsed from the start of heating of the heating means, and the temperature of the pot-shaped container is the first. In the case of the temperature of 1, water is supplied to a water amount smaller than the water supply amount before the reference time by a preset reference time after the water supply amount, and the temperature of the pot-shaped container is lower than the first temperature of the second temperature. Do not supply water in some cases.
Alternatively, the rice cooker according to the present invention includes a pot-shaped container for accommodating foodstuffs and an object to be heated containing water, a heating means for heating the pot-shaped container, and a water supply means for supplying water into the pot-shaped container. The water supply means is provided with a temperature detecting means for detecting the temperature of the pot-shaped container, and the water supply means is provided before the elapse of a preset reference time after the start of heating of the heating means and the temperature of the pot-shaped container. When is the first temperature, water is supplied, and after the reference time has elapsed from the start of heating of the heating means, water is not supplied, and the temperature of the pot-shaped container is lower than the first temperature. Do not supply water at the temperature of.

The rice cooker according to the present invention has an effect that the rice can be cooked with an appropriate amount of water according to the state of the rice after washing, the variety of the rice, the dry state and the like.

It is sectional drawing which shows typically an example of the whole structure of the rice cooker which concerns on Embodiment 1 of this invention. It is a figure which shows the temperature history at the time of cooking rice with the optimum amount of water with respect to the amount of rice and the quality of rice of the rice cooker which concerns on Embodiment 1 of this invention. It is a figure which shows the temperature history when the rice cooker which concerns on Embodiment 1 of this invention cooked rice with a small amount of water with respect to the rice quality. It is a flow chart which shows an example of the operation at the time of rice cooking of the rice cooker which concerns on Embodiment 1 of this invention.

A mode for carrying out the present invention will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be appropriately simplified or omitted. The present invention is not limited to the following embodiments, and can be variously modified without departing from the spirit of the present invention.

Embodiment 1.
1 to 4 relate to the first embodiment of the present invention, FIG. 1 is a schematic cross-sectional view schematically showing an example of the overall configuration of a rice cooker, and FIG. 2 shows the amount and quality of rice in the rice cooker. On the other hand, a diagram showing the temperature history when rice is cooked with the optimum amount of water, FIG. 3 is a diagram showing the temperature history when rice is cooked with a small amount of water relative to the amount of rice and rice quality of the rice cooker, and FIG. It is a flow chart which shows an example of the operation at the time. In FIG. 1, the relationship between the sizes of the constituent members may differ from the actual one.

First, the rice cooker 100 according to the first embodiment of the present invention will be described with reference to FIG. The rice cooker 100 cooks and cooks foodstuffs, which are mainly rice, and objects to be heated containing water.

As shown in FIG. 1, the rice cooker 100 includes a main body 1, a lid 10, and a water tank 20. The appearance of the main body 1 is a bottomed cylinder. The lid 10 is attached to the main body 1 so that the upper opening of the main body 1 can be opened and closed. The water tank 20 is detachably attached to the main body 1.

The main body 1 includes a container cover 2. The container cover 2 is formed in a bottomed tubular shape. A pot-shaped container 5 is detachably housed inside the container cover 2. The pot-shaped container 5 is formed in a bottomed cylindrical shape. The pot-shaped container 5 is made of a material containing a magnetic metal that generates heat by induction heating. A flange portion 5a is formed on the outer periphery of the upper end portion of the pot-shaped container 5. Inside the pot-shaped container 5, an object to be heated to be cooked is placed. The object to be heated includes foodstuffs and water. The ingredients are mainly rice. That is, the pot-shaped container 5 stores the food material and the object to be heated containing water.

A hole 2a is formed in the center of the bottom of the container cover 2. The pot bottom temperature sensor 4 is inserted inside the hole 2a of the container cover 2. The pot bottom temperature sensor 4 detects the temperature of the bottom of the pot-shaped container 5, particularly at the bottom. For example, a thermistor is used for the pot bottom temperature sensor 4. The pot bottom temperature sensor 4 is urged upward by an elastic means such as a spring, and is in contact with the bottom surface of the pot-shaped container 5 housed in the container cover 2. In this way, the pot bottom temperature sensor 4 constitutes a temperature detecting means for detecting the temperature of the pot-shaped container 5.

A heating coil 3 is provided on the bottom of the container cover 2. The heating coil 3 is arranged in an annular shape around the hole 2a. The heating coil 3 induces and heats the pot-shaped container 5. That is, the heating coil 3 constitutes a heating means for heating the pot-shaped container 5. As the heating means, an electric heater such as a sheathed heater may be used instead of the heating coil 3.

A hinge portion 6 is provided on one end side (on the left side when facing FIG. 1) of the upper portion of the main body 1. The hinge portion 6 supports the lid body 10 so that the lid body 10 can be opened and closed with respect to the main body 1.

The lid 10 has an outer lid 10a and an inner lid 10b. The outer lid 10a constitutes an upper portion and a side portion of the lid body 10. An operation display unit 13 is provided on the upper surface of the outer lid 10a. An inner lid 10b is attached to the surface of the outer lid 10a on the main body 1 side via a locking member 11. The inner lid 10b is made of a metal such as stainless steel.

A lid packing 9 is attached to the peripheral edge of the inner lid 10b. The lid packing 9 is a sealing material. When the pot-shaped container 5 is housed in the container cover 2 and the lid 10 is closed, the lid packing 9 comes into close contact with the flange portion 5a of the pot-shaped container 5, and the airtightness inside the pot-shaped container 5 can be ensured. A lid steam port 10c is formed on the inner lid 10b. The lid steam port 10c is an opening for discharging the steam generated in the pot-shaped container 5 to the outside.

An internal temperature sensor 14 is attached to the inside of the outer lid 10a (on the inner lid 10b side). The internal temperature sensor 14 is arranged so as to pass through the lid hole portion 10d formed in the inner lid 10b. The internal temperature sensor 14 is for detecting the temperature inside the pot-shaped container 5. The internal temperature sensor 14 may be composed of, for example, a thermistor.

Further, the inner lid 10b is formed with a lid water supply port 10e. The lid water supply port 10e is an opening to which the lid side path port 12a of the water supply path 12, which will be described later, is joined. The lid water supply port 10e may be formed of a plurality of holes, for example, as shown in FIG.

A cartridge 15 is detachably attached to the outer lid 10a. The cartridge 15 is arranged so as to penetrate from the upper surface of the outer lid 10a to the surface on the main body 1 side. The cartridge 15 is provided with a steam intake port 15a and a steam discharge port 15b. The steam intake 15a is formed on the inner lid 10b side of the cartridge 15. The steam intake 15a is provided with a valve (not shown) that moves up and down according to the vapor pressure generated during rice cooking. The steam intake port 15a is arranged so as to face the lid steam port 10c of the inner lid 10b. The steam discharge port 15b is arranged on the upper surface side of the outer lid 10a of the cartridge 15. The steam discharge port 15b is an opening for discharging steam that has passed through the valve of the steam intake port 15a to the outside.

The water tank 20 is made of, for example, plastic. A magnetic metal plate (not shown) that generates heat by induction heating is installed on the bottom surface of the water tank 20. The water tank 20 is detachably attached to the front surface side of the main body 1. A tank lid 21 is detachably fitted in the upper opening of the water tank 20. A tank vent 21a is formed in the tank lid 21. The tank vent 21a allows the inside and the outside of the water tank 20 to which the tank lid 21 is attached to communicate with each other.

Further, the tank lid 21 is provided with a tank water supply port 21b and a communication pipe 21c. The tank water supply port 21b is an opening formed in the tank lid 21 separately from the tank ventilation hole 21a. The upper end of the communication pipe 21c is connected to the tank water supply port 21b. The communication pipe 21c is arranged so as to extend downward from the tank water supply port 21b to the inside of the water tank 20.

A water tank heating coil 22 and a water tank temperature sensor 23 are provided at a position below the water tank 20 of the main body 1. The water tank heating coil 22 is for inducing heating the magnetic metal plate in the water tank 20 to heat the water stored in the water tank 20. An electric heater such as a sheathed heater may be used instead of the water tank heating coil 22. The water tank temperature sensor 23 is for detecting the water temperature in the water tank 20. The water tank temperature sensor 23 may be composed of, for example, a thermistor. The water tank temperature sensor 23 is urged upward by an elastic means such as a spring, and is configured to be in contact with the bottom surface of the water tank 20.

A water supply path 12 is provided between the outer lid 10a and the inner lid 10b. The water supply path 12 is a passage for supplying the water stored in the water tank 20 into the pot-shaped container 5. The water supply pipe forming the water supply path 12 is made of a heat-resistant resin or the like. The water supply pipe of the water supply path 12 is detachably housed in the outer lid 10a. A lid-side route port 12a is formed at one end of the water supply pipe of the water supply path 12. A tank-side path port 12b is formed at the other end of the water supply pipe of the water supply path 12. Between one end and the other end of the water supply pipe of the water supply path 12, there is a path portion 12d through which the lid side path port 12a and the tank side path port 12b pass.

When the lid 10 is closed, the lid side path port 12a is joined to the lid water supply port 10e of the inner lid 10b, and the tank side path port 12b is joined to the tank water supply port 21b of the water tank 20. Therefore, when the lid 10 is closed, the communication pipe 21c of the water tank 20 is connected to the lid water supply port 10e of the inner lid 10b via the water supply path 12. It is preferable to provide packing on the peripheral edges of the lid-side route port 12a and the tank-side path port 12b.

The rice cooker 100 is provided with a magnet pump 16 composed of a magnet pump motor 16a provided on the main body 1 side and a magnet pump impeller casing 16b provided at the lower end of a communication pipe 21c of the water tank 20. ing. When the magnet pump motor 16a of the magnet pump 16 is driven, the impeller in the magnet pump impeller casing 16b rotates. Then, when the impeller in the magnet pump impeller casing 16b rotates, the water in the water tank 20 is supplied into the pot-shaped container 5 through the communication pipe 21c and the water supply path 12. In this way, the water tank 20, the water supply path 12, and the magnet pump 16 form a water supply means for supplying water into the pot-shaped container 5.

The amount of water supplied by the water supply means is proportional to the duration of rotation of the impeller of the magnet pump 16, that is, the duration of drive of the magnet pump motor 16a. Since the duration of driving the magnet pump motor 16a is equal to the length of the energization time of the magnet pump motor 16a, the amount of water supplied at one time is the length of the energization time of the magnet pump motor 16a (magnet pump 16). It will be proportional.

As described above, the operation display unit 13 is provided on the upper surface of the outer lid 10a. The operation display unit 13 includes an operation unit and a display unit. The operation unit includes, for example, a switch that accepts operations of various instructions (for example, start, cancellation, reservation, etc. of rice cooking) given by the user of the rice cooker 100. The operations that can be performed by this operation unit include at least an input operation of the amount of the food material (rice) contained in the pot-shaped container 5. That is, the operation unit of the operation display unit 13 constitutes an input means capable of inputting the amount of the food material (rice) contained in the pot-shaped container 5.

Further, the display unit of the operation display unit 13 includes, for example, a liquid crystal display that displays various information. The information displayed on the display unit includes, for example, a rice cooking menu, time, amount of rice to be cooked, and the like. The rice-cooking menu indicates, for example, the selection result of standard rice-cooking or fast-cooking rice, whether the finish is firm or soft, and whether the type of rice is white rice-cooked rice or non-washed rice-cooked rice. The display unit is also provided with a function of displaying the current cooking process, the remaining time until the completion of cooking, and the like, and notifying by sound or light.

The main body 1 may be provided with a handle (not shown) for transporting the rice cooker 100. When the handle is provided, it is preferable that the handle is pivotally supported at the center of the upper part of the side surface of the main body 1 and the rotation direction of the handle is substantially the same as the rotation direction of the lid 10. By doing so, when transporting the rice cooker 100, the handle is rotated and lifted so as to be located substantially directly above the shaft fulcrum of the handle, and the user can transport the rice cooker 100 by holding only the handle. ..

The rice cooker 100 is provided with a control device 30. The detection signal of the pot bottom temperature sensor 4, the operation signal output from the operation unit of the operation display unit 13, the detection signal of the internal temperature sensor 14, and the detection signal of the water tank temperature sensor 23 are input to the control device 30. .. Then, the control device 30 controls the high-frequency current that energizes the heating coil 3 and the water tank heating coil 22, respectively, and the energization of the magnet pump 16 to the magnet pump motor 16a based on these input signals. The control device 30 also controls all other operations of the rice cooker 100.

The control device 30 is provided, for example, by being built in the main body 1 or the lid 10 of the rice cooker 100. The control device 30 can be configured by hardware such as a circuit device that realizes the function, or can be configured by an arithmetic unit such as a microcomputer or a CPU and software executed by the arithmetic unit. ..

The control device 30 includes a control unit 31, a boiling detection unit 32, a time measurement unit 33, and a storage unit 34. The control unit 31 includes the heating coil 3 and the water tank heating coil 22 based on the various input signals described above, the detection result of the boiling detection unit 32, the measurement result of the time measurement unit 33, and the information stored in the storage unit 34. By controlling the operation of the magnet pump motor 16a and the display contents of the operation display unit 13, the rice cooker 100 is made to perform the rice cooking operation.

This rice cooking operation is executed by the control unit 31 according to the rice cooking menu selected by operating the operation display unit 13 and the amount of rice to be cooked. That is, the control unit 31 operates and stops the heating coil 3, the magnet pump 16, the water tank heating coil 22, and the like to cook rice according to the selected rice cooking menu and the rice cooking program according to the amount of rice to be cooked. It has become.

The boiling detection unit 32 detects that the water in the pot-shaped container 5 has boiled. The boiling detection unit 32 can detect that the water contained in the object to be heated in the pot-shaped container 5 has boiled, for example, based on the detection results of at least one of the pot bottom temperature sensor 4 and the internal temperature sensor 14. Further, the time measuring unit 33 measures the elapsed time from the start of rice cooking (start of heating) or the start of boiling according to the instruction from the control unit 31.

Here, the rice cooking process in the rice cooking operation will be described. The rice cooking step includes a preheating step, a heating step, a boiling maintenance step, and a steaming step. First, in the preheating step, the pot-shaped container 5 is heated at a preset temperature for a preset time before boiling the water in the pot-shaped container 5. Then, this heating is a step of promoting water absorption of rice to produce taste components such as sugar which is a sweet component and amino acid which is an umami component.

Next, the temperature raising step is a step from the end of the preheating step to boiling the water in the pot-shaped container 5. The boiling maintenance step is a step of accelerating the gelatinization of rice starch by heating the water in the pot-shaped container 5 so as to maintain boiling. The steaming step is a step of sufficiently gelatinizing the starch centered on cooked rice grains to make the distribution of water uniform. The preheating step, the raising temperature step, the boiling maintenance step, and the steaming step are carried out in this order, and when the steaming step is completed, the rice cooking step is completed.

FIG. 2 shows the temperature history when rice is cooked with an optimum amount of water for a certain amount of rice and rice quality. As shown in FIG. 2, in the preheating step, both the temperature of the pot-shaped container 5 and the temperature of the object to be heated are maintained in a state of being lower than the boiling temperature. When the preheating step is completed, the pot-shaped container 5 is heated by the heating coil 3 until the water contained in the object to be heated is boiled in the heating step. When the boiling detection unit 32 detects that the water contained in the object to be heated has boiled, the process proceeds to the boiling step. During boiling of water contained in the object to be heated in the boiling step, both the temperature of the pot-shaped container 5 and the temperature of the object to be heated are in a constant state at the boiling temperature.

Then, when the boiling continues and the water evaporates and the water in the pot-shaped container 5 is not absorbed and the remaining water is about to disappear, the temperature of the object to be heated remains substantially constant at the boiling temperature. The temperature of the pot-shaped container 5 rises above the boiling temperature. Then, after the time t0 (dry-up determination time) shown in FIG. 2 elapses from the start of rice cooking (start of heating), the temperature of the pot-shaped container 5 becomes higher than the boiling temperature T1 or higher for the first time. When the temperature of the pot-shaped container 5 reaches a preset temperature T2 (dry-up temperature) higher than the temperature T1, the process proceeds to the steaming step. That is, when the temperature of the pot-shaped container 5 becomes equal to or higher than the preset dry-up temperature T2 after the elapse of the preset dry-up determination time t0 after the start of heating, the heating coil 3 is subjected to the steaming step. The pot-shaped container 5 is heated so as to migrate. The dry-up temperature T2 is specifically set to, for example, about 110 to 160 ° C. Here, the dry-up temperature T2 is set to, for example, 130 ° C.

Here, consider a case where the amount of water put in the pot-shaped container 5 at the start of heating is less than the optimum amount of water for the amount of rice and the quality of rice. In this case, the amount of water in the pot-shaped container 5 decreases faster with heating, and the temperature of the pot-shaped container 5 reaches the temperature T1 higher than the boiling temperature at an earlier stage.

On the other hand, it is generally said that it is preferable to cook rice in an amount 1.3 to 1.5 times the amount of rice. However, depending on the quality of the rice, there are cases where 1.3 times the amount of water is more preferable and cases where 1.5 times the amount of water is more preferable. For example, if the rice is dry, it is preferable to cook the rice with a large amount of water. That is, even if the amount of rice is the same, the optimum amount of water differs if the quality of rice is different. Then, when heating is started with the same amount of rice and water amount, if the rice quality requires a larger amount of water for optimum rice cooking (the optimum amount of water is larger), the water in the pot-shaped container 5 will be discharged sooner. That is, the temperature of the pot-shaped container 5 reaches the temperature T1 which is higher than the boiling temperature at an earlier stage.

Therefore, the control unit 31 included in the rice cooker 100 according to the first embodiment of the present invention determines that the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 becomes a preset reference temperature T1 or higher. Let the water supply means supply water. That is, the magnet pump 16 is driven to send water from the water tank 20 into the pot-shaped container 5. This water supply is performed especially when the temperature of the pot-shaped container 5 becomes the reference temperature T1 or higher before the elapsed time measured by the time measuring unit 33 after the start of heating exceeds the dry-up determination time t0.

In other words, when there are a first temperature and a second temperature that satisfy the relationship of the following equation (1), and the water supply means is the case where the temperature of the pot-shaped container 5 is the first temperature. Water is not supplied when the temperature of the pot-shaped container 5 is a second temperature lower than the first temperature.

(First temperature) ≧ (Reference temperature T1)> (Second temperature) ・ ・ ・ (1)

The reference temperature T1 is set to a temperature equal to or lower than the dry-up temperature T2. Further, the reference temperature T1 may be lower than the boiling temperature or higher than the boiling temperature. Specifically, for example, in the case where the above-mentioned dry-up temperature T2 is 130 ° C., if the reference temperature T1 is made higher than the boiling temperature, the reference temperature T1 is set to 115 ° C. or the like. When the reference temperature T1 is higher than the boiling temperature, the first temperature is also higher than the boiling temperature of the water in the pot-shaped container 5. Further, if at least the second temperature is lower than the boiling temperature, water supply is not performed.

Next, with reference to FIG. 3, some examples of water supply when the temperature of the pot-shaped container 5 becomes the reference temperature T1 or higher will be described. First, in the example shown in FIG. 3A, when the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 before the boiling detection of the boiling detection unit 32 becomes equal to or higher than the reference temperature T1, the control unit 31 Is to supply water to the water supply means. In this example, the control unit 31 supplies water to the water supply means by a preset amount of pre-boiling water supply.

If the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 after the boiling detection unit 32 detects boiling is equal to or higher than the reference temperature T1, it is not necessary to supply water. Water may be supplied as in the examples shown in b) and (c).

Here, in the example in which water is not supplied after boiling is detected, if the first temperature satisfying the above equation (1) is used, the water supply means is before boiling of the water in the pot-shaped container 5 and in the pot-shaped container 5. It can be said that water is supplied when the temperature of is the first temperature, and water is not supplied after the water in the pot-shaped container 5 has boiled.

In each of the examples shown in FIGS. 3 (b) and 3 (c), when the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 after the boiling detection of the boiling detection unit 32 becomes equal to or higher than the reference temperature T1. , The control unit 31 supplies water to the water supply means. In these examples, the control unit 31 supplies water to the water supply means by a preset amount of water after boiling. Then, the amount of water supplied after boiling is preset to be smaller than the amount of water supplied before boiling.

Therefore, when the first temperature satisfying the above-mentioned equation (1) is used for these examples, the water supply means is the temperature before boiling of the water in the pot-shaped container 5 and the temperature of the pot-shaped container 5 is the first temperature. In the case of, water is supplied by a preset amount of water before boiling, and after boiling of the water in the pot-shaped container 5, and when the temperature of the pot-shaped container 5 is the first temperature, the amount of water supplied before boiling is increased. It can be said that water is supplied by a preset amount of water after boiling to a small amount of water.

Further, among the examples of (b) and (c) of FIG. 3, the one shown in (b) of FIG. 3 shows the heating coil 3 before the preset reference time t1 elapses after the start of heating. When the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 becomes the reference temperature T1 or higher, the control unit 31 supplies water to the water supply means. In this case, the control unit 31 supplies water to the water supply means by a amount of post-boiling water supply that is smaller than the above-mentioned pre-boiling water supply amount, but in the example of FIG. 3B, the post-boiling water supply amount supplied by the water supply means is a reference. The amount of water supplied before the hour is set in advance.

If the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 becomes equal to or higher than the reference temperature T1 after the reference time t1 has elapsed, water supply does not have to be performed, and water is not supplied. ) May be used for water supply.

Here, in the example in which water is not supplied after the lapse of the reference time t1, if the first temperature satisfying the above equation (1) is used, the water supply means is preset after the heating of the heating means (heating coil 3) is started. Water is supplied before the specified reference time t1 elapses and when the temperature of the pot-shaped container 5 is the first temperature, and water is not supplied after the reference time t1 has elapsed from the start of heating of the heating means. , Can be said.

In the example shown in FIG. 3C, the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 is equal to or higher than the reference temperature T1 after the preset reference time t1 has elapsed from the start of heating of the heating coil 3. In the case of, the control unit 31 supplies water to the water supply means. Even in this case, the control unit 31 supplies water to the water supply means by a amount of post-boiling water supply that is smaller than the above-mentioned pre-boiling water supply amount, but in the example of FIG. 3C, the post-boiling water supply amount supplied by the water supply means is a reference. The amount of water supplied after hours is preset. The amount of water supplied after the reference time is less than the amount of water supplied before the reference time.

That is, in the case of water supply according to the example shown in (c) after the lapse of the reference time t1 in the example shown in FIG. 3B, if the first temperature satisfying the above equation (1) is used, the water supply means can be used. , Before the preset reference time t1 elapses after the start of heating of the heating means, and when the temperature of the pot-shaped container 5 is the first temperature, water is supplied by the preset reference time before the water supply amount. , After the reference time t1 has elapsed from the start of heating of the heating means, and when the temperature of the pot-shaped container 5 is the first temperature, the amount of water supplied after the reference time set in advance is smaller than the amount of water supplied before the reference time. It can be said that only the amount of water is supplied.

In any of the above examples, the reference time t1 is set to a time shorter than the dry-up determination time t0 described above. Then, the control unit 31 controls the heating coil 3 so that the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 becomes equal to or higher than the reference temperature T1 after the water is supplied to the water supply means. That is, the temperature of the pot-shaped container 5 becomes equal to or higher than the reference temperature T1 after the dry-up determination time t0 elapses after the water is supplied to the water supply means, and the temperature of the pot-shaped container 5 is higher than the temperature T1. The control unit 31 controls the heating coil 3 so as to be. Then, after the temperature of the pot-shaped container 5 reaches the dry-up temperature T2, the process shifts to the steaming step.

In this case as well, when expressed using the first temperature satisfying the above equation (1), in the heating coil 3 which is the heating means, the temperature of the pot-shaped container 5 is the first after the water supply means supplies water. It means that it is heated so that it becomes above the temperature of. By doing so, when water is supplied at a stage prior to the steaming process, the water added by the water supply is surely dried up, and excess water remains on the bottom of the pot in the pot-shaped container 5. It is possible to improve the cooking condition without any problem.

Further, in the examples of FIGS. 3 (b) and 3 (c), the reference time t1 is the elapsed time from the start of heating of the heating coil 3, but the reference time is the elapsed time after the boiling detection of the boiling detection unit 32. May be.

That is, in the example shown in FIG. 3B, the pot bottom temperature sensor 4 is after the boiling detection unit 32 detects boiling and before the preset reference time t1'elapses after the boiling is detected. When the temperature of the pot-shaped container 5 detected by the above is equal to or higher than the reference temperature T1, the control unit 31 may supply water to the water supply means by the amount of water supplied before the reference time.

In this case, for an example in which water is not supplied after the lapse of the reference time t1', if the first temperature satisfying the above equation (1) is used, the water supply means is after boiling the water in the pot-shaped container 5 and Before the preset reference time t1'elapses after the boiling, and when the temperature of the pot-shaped container 5 is the first temperature, the amount of water supplied before the reference time set in advance is smaller than the amount of water supplied before boiling. It can be said that only the amount of water is supplied, and the water is not supplied after the reference time t1'elapses after the water in the pot-shaped container 5 is boiled.

Similarly, in the example shown in FIG. 3C, the pot bottom temperature sensor 4 detects the boiling after the boiling detection unit 32 detects the boiling and after the reference time t1'elapses after the boiling is detected. When the temperature of the pot-shaped container 5 is equal to or higher than the reference temperature T1, the control unit 31 may supply water to the water supply means by the amount of water supplied after the reference time.

In this case, in the example shown in FIG. 3 (b), when water is supplied according to the example shown in (c) after the lapse of the reference time t1', if the first temperature satisfying the above equation (1) is used, water is supplied. The means is after boiling the water in the pot-shaped container 5, before the preset reference time t1'elapses after the boiling, and when the temperature of the pot-shaped container 5 is the first temperature. Water is supplied to a water volume smaller than the pre-boiling water supply amount by a preset reference time pre-water supply amount, and after the reference time t1'elapses after the water in the pot-shaped container 5 is boiled and the temperature of the pot-shaped container 5 is reached. When is the first temperature, it can be said that water is supplied to a water amount smaller than the water supply amount before the reference time by a preset reference time after the water supply amount.

In the example of supplying water by the water supply means using the reference time t1'after the boiling detection of the boiling detection unit 32, the water supply by the water supply means should not be performed before the boiling detection of the boiling detection unit 32. You may. In this case, since the pre-boiling water supply amount is not set, the pre-boiling water supply amount is set in advance regardless of the pre-boiling water supply amount.

Even if the conditions of the amount of rice, the quality of rice, and the amount of water of the object to be heated contained in the pot-shaped container 5 are the same, if the temperature of the pot-shaped container 5 or the like at the start of rice cooking is different, the pot-shaped container 5 after the start of heating The timing at which the temperature of the rice reaches the reference temperature T1 is different. Therefore, by determining the water supply amount based on the elapsed time after boiling detection instead of the elapsed time after the start of heating in this way, it is possible to additionally supply an appropriate amount of water with higher accuracy.

The specific values of the reference time t1 (or t1') and each water supply amount (water supply amount before boiling, water supply amount after boiling, water supply amount before reference time, water supply amount after reference time) are stored in the storage unit 34 in advance. You may remember it. Then, when the condition for supplying water is satisfied, the control unit 31 reads out the amount of water supplied according to the satisfied condition from the storage unit 34, and supplies water to the water supply means, that is, the energization time of the magnet pump motor 16a. May be decided.

Further, at this time, the control unit 31 may change at least the amount of water supplied before boiling according to the amount of the foodstuff input to the operation display unit 13, that is, the amount of rice. The other amount of water supplied after boiling, the amount of water supplied before the reference time, and the amount of water supplied after the reference time) may be similarly changed according to the amount of rice input to the operation display unit 13.

Since the optimum amount of water depends on the amount of rice to be cooked, even if the temperature of the pot-shaped container 5 reaches the reference temperature T1 at the same time, the larger the amount of rice to be cooked, the larger the amount of additional water to be supplied. However, the amount of water becomes more appropriate. Therefore, by changing the amount of additional water to be supplied according to the amount of rice input by the user, it is possible to supply an appropriate amount of water with higher accuracy.

Further, the amount of water supplied may be changed in three or more stages according to the elapsed time from the start of heating or the detection of boiling. By making it possible to set the water supply amount more finely according to the elapsed time, it is possible to cook rice with a more accurate and appropriate amount of water, and it is possible to improve the cooking condition. In this case, it is preferable to store in advance in the storage unit 34 a water supply amount table that determines the water supply amount based on the amount of rice input to the operation display unit 13 and the elapsed time from the start of heating or the detection of boiling. ..

Further, for example, the display unit of the operation display unit 13 may be provided with a function of notifying that water has been supplied when the water supply means has supplied water. That is, when the water supply means supplies water, the fact that water has been supplied may be displayed on the display unit of the operation display unit 13, for example, the LED may be turned on, or a voice or buzzer sound may be sounded. .. By doing so, it is not necessary to check whether it is necessary to add water to the water tank 20 based on the case of continuously cooking rice by removing the water tank 20 from the main body 1, which is convenient. The sex can be improved.

Next, an example of the operation of the rice cooker 100 configured as described above during rice cooking will be described with reference to the flow chart of FIG.
First, before operating the rice cooker 100, the user of the rice cooker 100 prepares a pot-shaped container 5 containing the washed rice and an arbitrary amount of water. In a conventional rice cooker, it is common to adjust the amount of water to be put into the pot-shaped container 5 according to a water level scale having a thickness of about 1 to 2 mm previously attached to the pot-shaped container 5 according to the amount of rice. .. On the other hand, in the rice cooker 100 according to the first embodiment of the present invention, the amount of water in the pot-shaped container 5 may be smaller than the water level scale according to the amount of rice.

Next, the user stores the pot-shaped container 5 containing the rice to be heated and water in the container cover 2 in the main body 1, and puts the water tank 20 containing a predetermined amount of water in the main body 1. set. Then, the user closes the lid 10, selects the rice cooking menu on the operation display unit 13, sets the amount of rice to be cooked (for example, 3 cups), presses the rice cooking switch (not shown), and cooks rice. An operation instruction is given to the rice cooker 100. The rice cooker 100 starts cooking rice when the rice cooker switch is pressed by the user and an operation instruction is given.

When the rice cooking is started, first, in step S1, the time measuring unit 33 starts measuring the elapsed time. In the following step S2, the rice cooker 100 performs a preheating step. When the preheating step is completed, the process proceeds to the temperature raising step of step S3.

In the temperature raising step of step S3, first, in step S31, the control unit 31 confirms whether or not the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 is lower than the reference temperature T1. If the temperature of the pot-shaped container 5 is lower than the reference temperature T1, that is, the temperature of the pot-shaped container 5 is not equal to or higher than the reference temperature T1, the process proceeds to step S32.

In step S32, the control unit 31 confirms whether or not the boiling of the object to be heated in the pot-shaped container 5 is detected by the boiling detection unit 32. If the boiling detection unit 32 does not detect boiling of the object to be heated in the pot-shaped container 5, the process returns to step S31.

On the other hand, in step S31, if the temperature of the pot-shaped container 5 is not lower than the reference temperature T1, that is, the temperature of the pot-shaped container 5 is equal to or higher than the reference temperature T1, the process proceeds to step S33. In step S33, the control unit 31 energizes the magnet pump motor 16a of the magnet pump 16 for a preset energization time A, and supplies water to the pot-shaped container 5 by the amount of water supplied before boiling. After step S33, the process proceeds to step S32.

The steps S31 to S33 are the temperature raising steps of step S3. Then, when the boiling detection unit 32 detects the boiling of the object to be heated in the pot-shaped container 5 in step S32, the temperature raising step of step S3 is completed, and the process proceeds to the boiling maintenance step of step S4.

In the boiling maintenance step of step S4, first, in step S41, the control unit 31 confirms whether or not the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 is lower than the reference temperature T1. If the temperature of the pot-shaped container 5 is lower than the reference temperature T1, that is, the temperature of the pot-shaped container 5 is not equal to or higher than the reference temperature T1, the process proceeds to step S42.

In step S42, the control unit 31 confirms whether or not the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 is equal to or higher than the dry-up temperature T2. If the temperature of the pot-shaped container 5 is not equal to or higher than the dry-up temperature T2, the process returns to step S41.

On the other hand, in step S41, if the temperature of the pot-shaped container 5 is not lower than the reference temperature T1, that is, the temperature of the pot-shaped container 5 is equal to or higher than the reference temperature T1, the process proceeds to step S43. In step S43, the control unit 31 confirms whether or not the elapsed time measured by the time measuring unit 33 is less than the reference time t1. If the elapsed time is less than the reference time t1, the process proceeds to step S44.

In step S44, the control unit 31 energizes the magnet pump motor 16a of the magnet pump 16 for a preset energization time B, and supplies water to the pot-shaped container 5 by the amount of water supplied before the reference time. The energization time B is shorter than the energization time A in step S33. After step S44, the process proceeds to step S42.

On the other hand, if the elapsed time is not less than the reference time t1 in step S43, the process proceeds to step S45. In step S45, the control unit 31 energizes the magnet pump motor 16a of the magnet pump 16 for a preset energization time C, and supplies water to the pot-shaped container 5 by the amount of water supplied after the reference time. The energization time C is shorter than the energization time B in step S44. After step S45, the process proceeds to step S42.

The steps S41 to S45 are the boiling maintenance steps of step S4. Then, if the temperature of the pot-shaped container 5 detected by the pot bottom temperature sensor 4 becomes the dry-up temperature T2 or more after the elapsed time becomes the dry-up determination time t0 or more in step S42, the boiling maintenance step of step S4. Is completed, and the process proceeds to the steaming step of step S5. Then, when the steaming step of step S5 is completed, the series of rice cooking steps is completed.

The rice cooker 100 configured as described above includes a pot-shaped container 5 for accommodating foodstuffs and an object to be heated containing water, a heating coil 3 which is a heating means for heating the pot-shaped container 5, and a pot-shaped container 5. It is provided with a water supply path 12, a magnet pump 16, a water tank 20, and a pot bottom temperature sensor 4 which is a temperature detecting means for detecting the temperature of the pot-shaped container 5. Then, the water supply means supplies water when the temperature of the pot-shaped container 5 is the first temperature, and does not supply water when the temperature of the pot-shaped container 5 is a second temperature lower than the first temperature.

Therefore, it is possible to cook rice with an appropriate amount of water according to the state of the rice after washing, the variety of the rice, the dry state, and the like. Further, even if the water level is roughly adjusted at the start of rice cooking, it is possible to stabilize the cooked rice with less variation in each cooked rice, and it is possible to obtain a better cooked rice. In addition, since it is not necessary for the user to accurately adjust the water level at the start of rice cooking, usability can be improved.

As described above, the heating coil 3 has a preheating step of preheating the water in the pot-shaped container 5 before boiling, a heating step of boiling the water in the pot-shaped container 5 after the preheating step, and a temperature rise. A boiling maintenance step of maintaining boiling of water in the pot-shaped container 5 after the completion of the process, and a steaming step of maintaining boiling of water after the completion of the boiling maintenance step.
The pot-shaped container 5 is heated so as to perform the above. Then, the water supply means supplies water when the temperature of the pot-shaped container 5 is the first temperature satisfying the equation (1) in one or more of the preheating step, the raising temperature step and the boiling maintenance step.

At this time, the reference temperature T1 to which the water supply means supplies water may be set to a different temperature at least in the preheating step, the raising temperature step, and the boiling maintenance step. In other words, this may be paraphrased by using the first temperature satisfying the above-mentioned equation (1), that is, the first temperature may be at least different in the preheating step, the raising temperature step, and the boiling maintenance step.

As can be seen from FIG. 2, when the amount of water is optimal, the temperature of the pot-shaped container 5 rises to the boiling temperature (about 100 ° C.) in the temperature raising step and the boiling maintenance step, while the pot-shaped container 5 is in the preheating step. The temperature of the container 5 changes at a temperature lower than the boiling temperature (for example, 60 to 80 ° C.). Therefore, the reference temperature T1 and the first temperature satisfying the equation (1) are set to different temperatures at least in the preheating step, the raising temperature step, and the boiling maintenance step. Specifically, for example, the reference temperature T1 in the preheating step is 90 ° C., and the reference temperature T1 in the temperature raising step and the boiling maintenance step is 115 ° C.

It should be noted that the reference temperature T1 at which the water supply means supplies water and the first temperature satisfying the equation (1) are set to one of the preheating step, the raising temperature step and the boiling maintenance step with the other two steps. It may be different. Further, the reference temperature T1 at which the water supply means supplies water and the first temperature satisfying the equation (1) may be different in each of these three steps. By doing so, when water is insufficient in each process, water can be supplied earlier.

Further, the reference temperature T1 for which the water supply means supplies water may be provided in a plurality of stages, and the water supply means may supply a different amount of water for each stage. For example, the reference temperature T1 is set to at least two steps, the lower temperature is T1-1, and the higher temperature is T1-2. Then, when the temperature of the pot-shaped container 5 reaches T1-1, which is the lower temperature, the water supply means supplies water by a preset amount of water supply. Further, when the temperature of the pot-shaped container 5 reaches T1-2, which is higher, the water supply means supplies water by a water supply amount larger than the water supply amount at the time of T1-1.

In other words, in the case of this example, there are a first temperature, a second temperature, and a third temperature that satisfy the relationship of the following equation (2), and the water supply means is the pot-shaped container 5. When the temperature is the first temperature, only the first amount of water is supplied, and when the temperature of the pot-shaped container 5 is lower than the first temperature and higher than the second temperature, it is less than the first amount of water. It means that only the second amount of water is supplied.

(First temperature) ≥ (reference temperature T1-2)> (third temperature) ≥ (reference temperature T1-1)> (second temperature) ... (2)

By doing so, the amount of water supplied can be finely adjusted according to the degree of temperature rise of the pot-shaped container 5, and the cooking condition of each rice cooking is further stabilized to achieve a good cooking condition. It is possible to do.

1 Main body 2 Container cover 2a Hole 3 Heating coil 4 Pot bottom temperature sensor 5 Pot-shaped container 5a Flange 6 Hinge part 9 Lid packing 10 Lid body 10a Outer lid 10b Inner lid 10c Lid Steam port 10d Lid hole part 10e Lid water supply port 11 Locking material 12 Water supply path 12a Lid side path port 12b Tank side path port 12d Path section 13 Operation display unit 14 Internal temperature sensor 15 Cartridge 15a Steam intake 15b Steam discharge port 16 Magnet pump 16a Magnet pump motor 16b Magnet pump impeller casing 20 Water tank 21 Tank lid 21a Tank vent 21b Tank water supply port 21c Communication pipe 22 Water tank heating coil 23 Water tank temperature sensor 30 Control device 31 Control unit 32 Boiling detection unit 33 Hours measurement unit 34 Storage unit 100 Rice cooker

Claims (13)

A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
When the temperature of the pot-shaped container is the first temperature, water is supplied by the first amount of water.
When the temperature of the pot-shaped container is a second temperature lower than the first temperature, water is not supplied.
A rice cooker that supplies water by a second amount of water, which is less than the first amount of water, when the temperature of the pot-shaped container is lower than the first temperature and higher than the second temperature. The heating means
A preheating step of preheating the water in the pot-shaped container before boiling, and
After the preheating step is completed, a temperature raising step of boiling the water in the pot-shaped container and
A boiling maintenance step of maintaining boiling of water in the pot-shaped container after the completion of the temperature raising step, and a boiling maintenance step.
After the boiling maintenance step is completed, the pot-shaped container is heated so as to carry out the steaming step.
The first aspect of claim 1, wherein the water supply means supplies water when the temperature of the pot-shaped container is the first temperature in one or more of the preheating step, the raising temperature step, and the boiling maintenance step. Rice cooker. The heating means
A preheating step of preheating the water in the pot-shaped container before boiling, and
After the preheating step is completed, a temperature raising step of boiling the water in the pot-shaped container and
After the heating step is completed, the pot-shaped container is heated so as to carry out the boiling maintenance step of maintaining the boiling of the water in the pot-shaped container.
The first temperature is a temperature different from the other two steps in one step of the preheating step, the raising temperature step and the boiling maintenance step, or a temperature different from each other in each of the three steps. The rice cooker according to claim 1. A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
Before boiling the water in the pot-shaped container and when the temperature of the pot-shaped container is the first temperature, water is supplied by a preset amount of water before boiling.
After boiling the water in the pot-shaped container, and when the temperature of the pot-shaped container is the first temperature, water is supplied by a preset amount of water after boiling to a water amount smaller than the amount of water supplied before boiling. Yes,
A rice cooker that does not supply water when the temperature of the pot-shaped container is a second temperature lower than the first temperature. The water supply means
After boiling the water in the pot-shaped container, before the preset reference time elapses after the boiling, and when the temperature of the pot-shaped container is the first temperature, the pre-boiling water supply. Water is supplied to a water volume less than the volume by a preset reference time pre-water supply volume.
After the reference time has elapsed from the boiling of the water in the pot-shaped container, and when the temperature of the pot-shaped container is the first temperature, the amount of water is set to be smaller than the water supply amount before the reference time. The rice cooker according to claim 4 , wherein water is supplied by the amount of water supplied after the reference time. The water supply means
After boiling the water in the pot-shaped container, before the preset reference time elapses after the boiling, and when the temperature of the pot-shaped container is the first temperature, the pre-boiling water supply. Water is supplied to a water volume less than the volume by a preset reference time pre-water supply volume.
The rice cooker according to claim 4 , wherein water is not supplied after the reference time has elapsed after boiling the water in the pot-shaped container. A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
A preset reference after boiling the water in the pot-shaped container, before the preset reference time elapses after the boiling, and when the temperature of the pot-shaped container is the first temperature. Water is supplied only by the amount of water supplied before the hour,
When the reference time has elapsed since the water in the pot-shaped container was boiled and the temperature of the pot-shaped container is the first temperature, the amount of water is set to be smaller than the amount of water supplied before the reference time. water supply gastric row only reference time after the water supply amount,
A rice cooker that does not supply water when the temperature of the pot-shaped container is a second temperature lower than the first temperature. A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
A preset reference after boiling the water in the pot-shaped container, before the preset reference time elapses after the boiling, and when the temperature of the pot-shaped container is the first temperature. Water is supplied only by the amount of water supplied before the hour,
No water is supplied after the reference time has elapsed since the water in the pot-shaped container was boiled .
A rice cooker that does not supply water when the temperature of the pot-shaped container is a second temperature lower than the first temperature. A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
Before the preset reference time elapses from the start of heating of the heating means, and when the temperature of the pot-shaped container is the first temperature, water is supplied by the preset reference time before the water supply amount.
After the reference time has elapsed from the start of heating of the heating means, and when the temperature of the pot-shaped container is the first temperature, the reference time set in advance to a water amount smaller than the water supply amount before the reference time. water supply gastric row only rear water supply amount,
A rice cooker that does not supply water when the temperature of the pot-shaped container is a second temperature lower than the first temperature. A pot-shaped container for storing foodstuffs and objects to be heated containing water,
A heating means for heating the pot-shaped container and
A water supply means for supplying water into the pot-shaped container and
A temperature detecting means for detecting the temperature of the pot-shaped container is provided.
The water supply means
Water is supplied before the preset reference time elapses after the start of heating of the heating means and when the temperature of the pot-shaped container is the first temperature.
No water is supplied after the reference time has elapsed from the start of heating of the heating means .
A rice cooker that does not supply water when the temperature of the pot-shaped container is a second temperature lower than the first temperature. The first temperature is higher than the boiling temperature of the water in the pot-shaped container.
The rice cooker according to any one of claims 1 and 7 to 10 , wherein the second temperature is lower than the boiling temperature. Further provided with an input means capable of inputting the amount of the foodstuff contained in the pot-shaped container.
The rice cooker according to any one of claims 1 to 11 , wherein the water supply means changes the water supply amount according to the amount of the foodstuff input to the input means. The rice cooker according to any one of claims 1 to 12 , further comprising a notification means for notifying that water has been supplied when the water supply means has supplied water.

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