JPH03202023A - Electric rice cooker - Google Patents

Abstract

PURPOSE:To allow a very week current not to flow and to prevent a warming display lamp from lighting dimly even in the case of a cut-off state on an electric circuit by providing a warming heater provided on an outer pot, and a resistance on the warming display lamp consisting of a neon lamp provided in parallel thereto. CONSTITUTION:The rice cooker is provided with a rice cooking heater 9, a warming heater 14, and a circuit changeover switch 22 provided with the position of power source disconnection. Also, the rice cooker is provided with a rice cooking/warming switch 19 for switching a rice cooking circuit and a warming circuit, a rice cooking display lamp 25 consisting of a neon lamp connected in parallel to the rice cooking heater and the warming heater, respectively and a warming display lamp 26. In such a state, the rice cooking heater and the warming heater are connected in series, and between them, the circuit changeover switch 22 is provided, and also, a resistance R4 is provided in parallel to the warming display lamp 26. According to such a constitution, even if a voltage is applied to one end of the warming display lamp 26 consisting of the neon lamp in a power source disconnection state in the warming circuit, a minute discharge generated by the action of the resistance R4 can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a five-lambda rice cooker that can cook rice and keep it warm, and each status is displayed using a neon lamp.

2. Description of the Related Art Conventionally, the electric circuit of this type of electric rice cooker generally had a configuration as shown in FIG. The configuration will be described below with reference to the drawings.

As shown in the figure, a rice cooking heater 1 and a rice cooking indicator lamp 2
A heat retention heater 3 and a heat retention indicator lamp 4 are arranged in parallel. The electric circuits for cooking rice and keeping warm are switched by a rice cooking and keeping warm switch 5, and a circuit changeover switch 6 in the housing, which has a power cut position, allows the power to be turned off or switched to another cooking circuit.

When cooking rice using the above configuration, first, move the movable contacts aa and ab of the circuit changeover switch 6 to the fixed contacts ec and 6.
a, then operate the rice cooking heat-retaining switch 5, and switch and connect the movable contact piece 5a to the fixed contact 6b, a rice cooking circuit is formed, power is supplied, rice cooking starts, and the rice cooking indicator lamp 2 lights up. do. When keeping the rice warm, the movable contact piece 5a of the cooking rice heat keeping changeover switch 5 is connected to the other fixed contact 6c.
If the connection is switched to , a heat retention circuit is formed, and the heat retention indicator lamp 4 lights up at the same time that the heat retention is started. If it is desired to stop the heat retention, the electric circuit is cut off by switching the movable contacts eta and eb of the circuit changeover switch to the off positions 6θ and sf. , Ra, and Rb are current-limiting resistors connected in series to the rice cooking indicator lamp 2 and the warming indicator lamp 4, respectively.

Problems to be Solved by the Invention In such conventional electric rice cookers, one end of the keep warm indicator lamp 4 remains connected to one side of the power supply even when the circuit selector switch 6 is turned off in the keep warm mode. Even though the electric circuit was cut off, voltage was applied to one side, and a small current flowed between the rice cooker and the rice cooker itself, causing a slight discharge between the electrodes and causing a dim light. This phenomenon was particularly likely to occur when the power supply voltage was as high as 200V.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electric rice cooker equipped with an electric circuit that prevents the warm-up display lamp from dimly lighting up when the power is turned off and being misunderstood as being in the warm-up state.

Means for Solving the Problems In order to achieve the above object, the present invention provides a rice cooking heater, a heat retention heater, a circuit changeover switch having a power-off position, and a rice cooker that switches between a rice cooking circuit and a heat retention circuit. It has a heat retention switch, and a rice cooking indicator lamp and a heat retention indicator lamp each consisting of a neon lamp connected in parallel to the rice cooking heater and the heat retention heater, and the rice cooking heater and the heat retention heater are connected in series. A circuit changeover switch is provided between the two, and a resistor is provided in parallel with the heat retention indicator lamp.

Effect of the Invention The present invention has the above-described configuration, so that even if a voltage is applied to one end of the heat-retaining display lamp made of a neon lamp when the power is turned off in the heat-retaining circuit, a slight discharge is generated due to the action of the resistor arranged in parallel, and the neon light is This prevents the lamp from dimly lighting.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. 1 and FIG. 2.

In the figure, 7 is a cylindrical body, 8 is a bottomed cylindrical outer pot inside the body, and 9 is a screw 10 attached to the bottom of the outer pot 8.
This is a rice cooking heater that is firmly fixed and passes through the bottom of the outer pot 8. Reference numeral 11 denotes an inner pot that can be freely stored in the outer pot 8, and its bottom surface is in contact with the top surface of the rice cooking heater 9. Reference numeral 12 denotes a lid whose one end is pivotally supported on the body 7 so as to be openable and closable, and whose other end is lockable. 13 is the body 7
and an annular upper frame to which the upper edge of the lid body 12 is fixed; 14 is a heat-retaining heater provided at a relatively upper portion of the outer wall of the outer pot 8;
Reference numeral 15 indicates an automatic temperature controller for controlling the heat retention temperature provided on the outer wall of the outer pot 8, 16 indicates an automatic temperature regulator also provided on the outer wall of the outer pot 8, and 17 indicates an automatic temperature controller fixed to the rice cooking heater 9. A regulator 18 is a lower frame provided at the bottom of the body 7;
Reference numeral 19 denotes a rice cooking/warming switch which is operated by operating a switch button 21 provided on a display board 2o fixed to the body 7. The switch button 21 is connected via a lever to a heat-sensitive element for switching between rice cooking and heat retention, which is provided at the center of the bottom of the outer pot 8, and automatically returns when a predetermined temperature is reached at the end of cooking. There is.

22 is a double-pole, double-throw type circuit changeover switch, with rotary knob 2.
3, it can be operated and has a power off position. 24 is the cooking timer for stewing, 25 is the cooking indicator lamp,
26 is a keep-warm indicator lamp, and 27 is a simmer indicator lamp, each of which is a neon lamp and is equipped with resistors R, , R2, and R5 for current control of 100 to 200Ω, and is connected in parallel with the keep-warm indicator lamp 26. A resistor R4 is provided.

The button 28 is a back plate that covers the wiring storage section of the main body of the device.

To explain the operation of the above configuration, when cooking rice, turn the rotary knob 23 to the rice cooking/warming position 29, and switch the circuit selection switch 220, movable contact piece 22 &,
22b is a fixed contact 22c.

22d, and then operate the switch button 21 to connect the movable contact piece 19a of the rice cooking/warming switch 19 to the fixed contact 1.
9b, a rice cooking circuit is formed and power is supplied. At this time, the rice cooking indicator lamp 26 connected in parallel with the rice cooking heater 9 lights up to indicate that rice is being cooked. When the rice cooking is finished and the heat sensitive element for rice cooking/warming switching is activated, the movable contact piece 19 of the rice cooking/warming switch 19 is activated.
A is automatically switched and connected to one fixed contact 19C to form a heat retention circuit. At this time, the rice cooking indicator lamp 25 goes out and the heat retention indicator lamp 26 lights up. After that, the conduction control of the heat retention heater 14 is controlled by the automatic temperature controller 15.
The rice in the inner pot 11 is maintained at about 7o degrees, which is the optimum temperature for keeping it warm.

On the other hand, when cooking by stewing, turn the rotary knob 1 and 2.
3 to set the desired cooking time position 30, the movable contacts 22a, 22k of the circuit changeover switch 22
l to the other fixed contact 22e.

22f, and then operate the switch button 21 to switch and connect the movable contact piece 191L of the rice cooking/warming switch 19 to the fixed contact 191C, a simmering cooking circuit is formed and the broken molds are supplied. At this time, the simmering cooking indicator lamp 27 connected in parallel with the rice cooking heater 9 lights up.
In addition to displaying that cooking is in progress, the cooking timer 24
starts working.

Both automatic temperature regulators 16 and 17 are initially in the on state, and as the rice cooking heater 9 heats up, the automatic temperature regulator 1 fixed to the rice cooking heater 9 is first turned off. Then, the automatic temperature controller 16 provided on the outer wall of the outer pot 8 is turned off. When the heating is finished and the rice is naturally cooled, the automatic temperature controller 17 is first turned on, and the rice cooking heater 9 starts heating again.

At this time, the automatic temperature controller 16 is in an off state, and stewing cooking is performed by repeatedly turning the automatic temperature controller 17 on and off. That is, the role of the automatic temperature controller 16 is to raise the temperature of the food in the inner pot 11 and stop heating the rice cooking heater 9 just before the rice is boiled, and is set not to operate during simmering cooking. .

When the set time has elapsed and the stew cooking is finished, the movable contact piece 22a of the circuit changeover switch 22 is automatically turned off by the operation cam that is linked to the cooking timer 24.

22b is activated to the off position 22g, 22h to turn off the power. At this time, the stew cooking indicator lamp 2γ is turned off, and all the indicator lamps are turned off. At this time, the rice cooking/warming switch 19 does not return automatically, so operate the switch button 21 to switch the movable contact piece 192L to the fixed contact 19C and return it to its original position. Looking at the electric circuit at this time, one end of the heat retention indicator lamp 26 is connected to the circuit changeover switch 22 and is cut off from the power supply terminal E1, but the other end is connected to the power supply terminal E2 via the rice cooking heat retention switch 19. has been done. In other words, although the electric circuit is cut off, since it is connected to the insulated outer pot 8, a slight current flows through the heat retention indicator lamp 26, which is a neon lamp, and a slight discharge occurs, causing it to dimly light up, but it does not keep the heat warm. By connecting a large resistor of about 100 OKΩ in parallel with the indicator lamp 26, even this slight discharge can be removed, and the dim lighting of the warming indicator lamp 26 can be prevented from being misunderstood as being kept warm. I can do it.

The resistor R4 can be placed on the same wiring board as the housing, the rice cooking lamp 25, the warming lamp 26, and the current control resistors R1 and R2 placed in series with them, making it compact and does not take up much space. A product that is easy to assemble can be obtained. Furthermore, since the effect can be obtained with just one resistor, it is inexpensive.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a heat-retaining heater provided on the outer wall of the outer pot and a heat-retaining indicator lamp consisting of a neon lamp arranged in parallel with the heater are arranged in parallel. Since a resistor is installed, even if one end of the heat retention indicator lamp is connected to the power terminal and the other end is cut off in the electrical circuit, a small current will not flow, preventing the heat retention indicator lamp from dimly lighting up. be able to.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of an electric rice cooker showing an embodiment of the present invention, Fig. 2 is a partially broken pressure surface view of the electric rice cooker, and Fig. 3 is an electric circuit diagram of a conventional electric rice cooker. . 8... Outer pot, 9... Rice cooking heater, 11...
- Inner pot, 14... Heater for keeping warm, 22...
... Outlet selection switch, 25 ... Rice cooking indicator lamp, 26 ... Heat retention indicator lamp.

Claims (1)

[Claims] A bottomed cylindrical outer pot with a rice-cooking heater installed on the bottom, an inner pot that can be stored freely within the outer pot, a heat-retaining heater provided on the outer peripheral side wall of the outer pot, and a power-off position. A rice cooking/warming switch for switching between a rice cooking circuit and a warming circuit, and a rice cooking indicator lamp and a warming indicator lamp each comprising a neon lamp connected in parallel to the rice cooking heater and the warming heater. An electric rice cooker in which the rice cooking heater and the warming heater are connected in series, a circuit changeover switch is provided between them, and a resistor is arranged in parallel with a warming indicator lamp.