JPH08168436A - Rice-gruel cooking utensil - Google Patents

Abstract

PURPOSE: To prevent excessive or insufficient boiling from occurring for boiling delicious rice gruel by setting a target temperature higher than preheating temperatures on two stage, and controlling temperature after the electrification to a rice boiling heater is turned off to return to the preheating temperatures to be kept by the control when the temperature detected by a temperature sensor reaches the target temperature. CONSTITUTION: When an inner pan 5 receiving a required amount of rice or boiled rice and water is put in an outer pan 2 to turn on a start switch 8 after water is put in the outer pan 2, the electrification to a rice boiling heater 3 is started. A rice boiling timer is started by the start of the electrification to start a preheating 1 process. After the elapse of a predetermined time, two stages of preheating are carried out to shift to a preheating 2 process. A target temperature higher than the preheating temperature on 2 stages is set. After the electrification to the rice boiling heater 3 is turned off when a temperature detected by a temperature sensor 4 reaches the target temperature, the temperature is controlled according to the preheating temperatures. Thus, the excessive boiling and insufficient boiling are obviated to boil delicious rice-gruel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porridge cooker of a hot water type.

[0002]

2. Description of the Related Art In a hot water cooked rice porridge cooker in which water is placed between an outer pot and an inner pot, and the inner pot is indirectly heated via hot water by a rice heating heater provided in the outer pot, the inner pot is Since the temperature of itself cannot be directly detected, it has been conventionally cooked without preheating. That is, when the water between the outer pot and the inner pot disappears and the temperature sensor provided in the outer pot detects a predetermined cooking temperature above the boiling point, the power supply to the rice cooking heater is stopped.

[0003]

However, since the conventional porridge cooker does not perform preheating, the rice cooking capacity, room temperature,
Alternatively, the rice cooking time may differ due to power fluctuations. And if you specify the time to cook with timer rice,
Due to such a difference in rice cooking time, in some cases it will be cooked earlier than the set time and the heat retention will become longer, resulting in overcooking, and in other cases, when the cooked time comes, it will still be cooked. There was a case where the power was turned off and cooking was not enough.

The present invention has been made in view of the above problems, and provides a porridge cooker which can be cooked deliciously without overcooking or undercooking by performing preheat control in a porridge cooker of a water boiling type. That is the purpose.

[0005]

To achieve the above object, the present invention provides an outer pot having a rice cooking heater, and an inner pot heated by the rice cooking heater through hot water contained in the outer pot. And a temperature sensor that detects the temperature of the outer pot, and a control unit that controls the energization of the rice cooking heater based on the temperature detected by the temperature sensor, in at least 2 The preheating temperature of the stage and the target temperature higher than these preheating temperatures are set, and when the temperature detected by the temperature sensor reaches the target temperature, the power supply to the rice cooking heater is turned off, and then the temperature control is performed at the preheating temperature. Is to do.

The first stage preheating temperature is preferably lower than 60.degree. The second stage preheating temperature is preferably near the boiling point.

[0007]

[Function] When the temperature detected by the temperature sensor reaches the target temperature higher than the preheating temperature, the rice cooker heater is turned off and controlled at the preheating temperature, whereby the cooked rice temperature is controlled at a temperature close to the preheating temperature. It As a result, differences in rice cooking time due to rice cooking capacity, room temperature, power fluctuations, etc. are reduced.

[0008]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a porridge cooker according to the present invention. An outer pot 2 is housed and fixed inside the exterior body 1. A rice cooking heater 3 and a temperature sensor 4 are attached to the outer peripheral surface of the lower portion of the outer pot 2. The inner pot 5 is housed inside the outer pot 2 in a removable manner. And
The outer pot 2 and the inner pot 5 are covered with a lid 6. On the front of the exterior body 1, a timer setting dial 7,
A start switch 8 and the like are provided.

This porridge cooker is a microcomputer,
It has a control device 9 having a timer and a memory. The control device 9 controls the rice cooking heater 3 in cooperation with the timer based on the temperature detected by the temperature sensor 4.

The rice cooking operation of porridge by the control device 9 will be described below with reference to the flow chart shown in FIG.

After the outer pot 2 is filled with water, the inner pot 5 containing the required amount of rice or rice and water is placed in the outer pot 2 and the start switch 8 is turned on to start the energization of the rice cooking heater 3. It When the timer is set by the timer setting dial 7, energization of the rice cooking heater 3 is started from the start start time calculated from the set time.

When the energization is started, in step 101, the rice cooking heater 3 is energized at a duty ratio of 30/30 (100%) and the rice cooking timer is started. As a result, the outer pot 2
The water contained therein is heated to become hot water, the inner pot 5 is indirectly heated via this hot water, and one preheating step is started. Then, in step 102, it is judged whether or not the temperature T _S detected by the temperature sensor 4 is equal to or higher than the target temperature T ₁ ′ (75 ° C.), and if it is equal to or lower than the target temperature T ₁ ′, step 103
Then, after confirming that the elapsed time t of the rice cooking timer does not exceed t ₁ (25 minutes), the process returns to step 101 to continue the energization. If the elapsed time t of the rice cooking timer has passed t ₁ in step 103, is the capacity extremely large?
Recognizing that the room temperature is extremely low or the voltage is low, the routine proceeds to step 106, where the second preheating step is performed.

When the detected temperature T _S becomes equal to or higher than the target temperature T ₁ ′ in step 102, the energization is once turned off, and then the energization rate is set to 10/30 in step 104, and the detected temperature T _S is the predetermined preheating temperature T _{1 ′.} Adjust the temperature so that it becomes (55 ° C). Then, at step 105, the elapsed time t of the rice cooking timer
If t has not passed t ₁ , the process returns to step 104 to continue temperature adjustment, and if it has passed, the process proceeds to step 106.

In step 106, the duty ratio is 30/30.
At (100%), the rice cooking heater 3 is energized to start the preheating 2 step. Then, in step 107, it is judged whether or not the detected temperature T _S is equal to or higher than the target temperature T ₂ ′ (95 ° C.), and if it is equal to or lower than the target temperature T ₂ ′, the elapsed time t of the rice cooking timer is t in step 108. _After confirming that ₂ (44 minutes) has not elapsed, the process returns to step 106 to continue energization.
In step 108, the elapsed time of the rice cooking timer t is t ₂
If it has passed, it is recognized that the capacity is extremely large, the room temperature is extremely low, or the voltage is low, and the process proceeds to step 111 to proceed to the next cooking process.

When the detected temperature T _S becomes equal to or higher than the target temperature T ₂ ′ in step 107, the energization is once turned off, and then the energization rate is set to 15/30 in step 109 so that the detected temperature T _S is the predetermined preheating temperature T ₂ Adjust the temperature so that it becomes (85 ° C). Then, in step 110, the elapsed time t of the rice cooking timer
If t has not passed t ₂ , the process returns to step 109 to continue temperature adjustment, and if it has passed, the process proceeds to step 111.

In step 111, the duty ratio is 30/30.
At (100%), the rice cooking heater 3 is energized to start the cooking process. Then, in step 112, it is determined whether or not the detected temperature T _S is equal to or higher than the cooked temperature T ₃ (108 ° C.), and if it is equal to or lower than the cooked temperature T ₃ , the elapsed time t of the rice cooking timer is t in step 113. _After confirming that ₃ (85 minutes) has not elapsed, the process returns to step 111 to continue energization. If the elapsed time t of the rice cooking timer has passed t ₃ in step 113, it is recognized that the capacity is extremely large, the room temperature is extremely low, or the voltage is low, and the duty ratio is 0/0 in step 114. Set to 30 and stop energizing.

When the detected temperature T _S reaches the cooked temperature T ₃ or more in step 112, the energization is temporarily turned off and step 1
In step 15, the duty ratio is set to 15/30, the temperature is adjusted so that the detected temperature T _S becomes a predetermined preheating temperature T ₄ (85 ° C.), and steaming is performed. If the elapsed time t of the rice cooking timer has not passed t ₃ in step 116, step 115
Return to and continue temperature control, and if it has passed, cook rice.

FIG. 3 shows temporal changes in the temperature T _S (solid line) and the cooked rice temperature T _A (dashed line) detected by the temperature sensor during the rice cooking operation of the rice porridge described above, and the temporal changes in the power consumption of the rice cooking heater. Show. In the preheating 1 step and the preheating 2 step, heating is performed at 100% conductivity until the detected temperature T _S reaches the target temperatures T ₁ ′ and T ₂ ′ that are higher than the predetermined preheating temperatures T ₁ and T _2. Even when cooking, the cooked rice temperature T _A is the preheating temperature T ₁ , T
_It rises to the vicinity of ₂ . Then, the detected temperature T _S reaches the target temperatures T ₁ ′ and T ₂ ′, the energization is turned off, and the preheating temperature T ₁
When the temperature is adjusted at T ₂ , the cooked rice temperature T _A is maintained near the preheating temperature. Moreover, since the completion time of each process is limited by the rice cooking timer, there is no difference in the cooking time.

[0019]

As is apparent from the above description, according to the present invention, since the cooked rice temperature approaches the preset preheating temperature, proper preheating can be performed, and the cooked rice capacity, room temperature, power fluctuation, etc. There is no difference in rice cooking time, and even if you cook with timer, there is no variation in taste such as overcooking or insufficient cooking,
It has the effect of cooking delicious porridge.

[Brief description of drawings]

FIG. 1 is a block diagram of a porridge cooker according to the present invention.

FIG. 2 is a flowchart of a porridge cooking operation.

FIG. 3 is a graph showing changes with time of temperature detected by a temperature sensor, cooked rice temperature, and electric power.

[Explanation of symbols]

2 ... Outer pot, 3 ... Rice cooking heater, 4 ... Temperature sensor, 5 ... Inner pot, 9 ... Control device.

Claims (3)

[Claims] 1. An outer pan having a rice cooking heater, an inner pan heated by the rice cooking heater via hot water contained in the outer pan, a temperature sensor for detecting the temperature of the outer pan, and the temperature. In a hot water cooking type rice porridge cooker including a control unit that controls energization to the rice cooking heater based on a temperature detected by a sensor, at least two stages of preheating temperatures and target temperatures higher than these preheating temperatures are set. The rice porridge cooker is characterized in that after the temperature is set and the temperature detected by the temperature sensor reaches a target temperature, the rice cooking heater is de-energized and then temperature control is performed at a preheating temperature. 2. The porridge cooker according to claim 1, wherein the preheating temperature in the first stage is lower than 60 ° C. 3. The porridge cooker according to claim 1, wherein the second stage preheating temperature is a temperature near the boiling point.