JPH058909Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of use and summary of the invention) This invention relates to a timer-type rice cooker, in particular a type of rice cooker in which the upper unit consisting of the rice cooker kettle and its warming device, and the lower unit can be separated from the rice cooking mechanism and heating device. When the timer is set, the warming circuit is not brought into a conductive state, thereby preventing poorly cooked rice caused by the rice cooker kettle and the rice contained in it being pre-heated for a long period of time before cooking begins.

(Prior art and its problems) In the conventional heat-retaining rice cooker with upper and lower separation type,
58-410, the lower device 1 is provided with a first power plug 11 for appliances, and the upper device 2 is provided with a second power plug 21 for heat retention. Therefore,
During rice cooking, the electrical devices built into the lower device 1 and heating devices such as the burner 12 are in operation, and when rice cooking is completed by these devices, the first
Electricity is supplied to the heat-retaining circuit of the upper device 2 through the path from the power plug 11 to the second power plug 21, and the cooked rice is kept warm at a predetermined temperature.

In the conventional device described above, when the second power plug 21 is pulled out from the lower device 1, only the upper device can be carried. Furthermore, if the second power plug 21 is a normal power plug, it can be plugged into another outlet, and heat can be maintained using only the upper device.

However, if the above-mentioned conventional rice cooker is used as it is as a timer type rice cooker, rice cooking problems will occur in the case of timer cooking.

This is because the timer device built into the lower device does not operate unless the first power plug 11 is connected to an outlet, and on the other hand, this causes electricity to be supplied from the second power plug 21 to the heat insulation circuit of the upper device 2. This is because the rice cooker pot 22 is kept warm and heated by the heat retention circuit for a long time while the timer is operating. As a result, when the set time on the timer elapses, that is, when rice cooking starts, the rice in the rice cooker is half-cooked, and when the rice is heated further from this state, it becomes sticky and sticky. It will become.

(Technical Problem) The present invention connects the electrical circuit of the lower device 1 and the heat-insulating circuit of the upper device 2 so that they can be connected to and separated from each other using the second power plug 21 for keeping warm, and the electric circuit of the lower device 1 is connected to the power source of the heat-retaining circuit of the upper device 2 so that they can be connected and separated. In this device, which is equipped with a timer device 3 for setting the start time and in which the appliance power is supplied to this lower device through the first power plug 11, when cooking rice using the timer device (hereinafter referred to as timer cooking), the heat retention device In order to prevent poor rice cooking caused by the rice cooking pot being kept warm for a long time, the objective is to prevent electricity from being input to the warming circuit while the timer is operating.

(Means) The technical means of the present invention taken to solve the above-mentioned technical problem is ``The heat-retaining circuit of the upper device 2 is a heat-retaining circuit that performs a heat-retaining operation when the power is turned on,
The normally closed output contact 31 of the timer device 3 was inserted into the electricity supply circuit to the connected part on the lower device 1 side to which the second power plug 21 is connected.

(effect) The above technical means works as follows.

In the case of timer rice cooking, the warming operation is almost always executed after rice cooking is completed, so in most cases, the second power plug 21 is connected to the lower device 1 in the timer-type warming rice cooker that is the subject of the present invention. Timer cooking is performed while connected to the connected part on the side.

In this case, when an operation for timer rice cooking is performed, the timer device 3 becomes operational. In this operating state, the normally closed output contact 31 is open, and after the set time has elapsed, the normally closed output contact 31 is closed.

Therefore, while the timer device 3 is operating, electricity is not supplied to the second power plug 21 side, and the heat retention circuit is in a non-conductive state until the set time has elapsed.

Next, when the set time has elapsed, the rice cooking operation starts and at the same time, the heat retention circuit also becomes conductive.
Once the rice is cooked, it will automatically switch to the keep warm mode.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

In the case of timer rice cooking, connect the second power plug 2 in advance.
Even if the rice cooking operation is executed while the timer device 3 remains connected to the connected part on the lower device 1 side, the heat retaining circuit connected to the second power plug 21 is in a non-conductive state while the timer device 3 is operating. In this way, it is possible to prevent the inconvenience of performing heat-retaining heating for a long time before starting rice cooking as in the conventional method, and also to prevent rice cooking failures caused by this.

(Example) Hereinafter, an example of the present invention will be described based on FIG. 1.

In the embodiment shown in FIG. 1, the second power plug 21 of the upper device 2 is connected to the outlet 13 of the lower device 1, and this outlet and the rice cooking device 4 are both connected to the normally closed output contact of the timer device 3. 31
The configuration is connected to the .

In this embodiment, the first power plug 11 is connected to a household outlet, and the manual rice cooking switch 41 is turned on.
When the rice cooker 4 is closed, the circuit of the rice cooker 4 consisting of a rice cooking control device and a heating device and the outlet 13 becomes conductive, and the rice cooker is used as a normal rice cooker. By the action of the thermostat 25, the rice cooker 22 is heated to a predetermined temperature.

Next, when the timer switch 42 is closed, the timer device 3 becomes operational, its normally closed output contact 31 is opened, and the circuits of the rice cooker 4 and the outlet 13 are rendered non-conductive.

Thereafter, when the set time has elapsed, the normally closed output contact 31 of the timer device 3 returns to close and the rice cooker 4
And the heat insulation circuit 23 connected to the outlet 13 becomes conductive.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, and Fig. 2 is an explanatory diagram of a conventional example.
... Upper device, 21 ... Second power plug, 3 ...
Timer device, 31...normally closed output switch.

Claims (1)

[Scope of utility model registration request] The electric circuit of the lower device 1 and the heat-retaining circuit of the upper device 2 are connected to the power supply so that they can be freely connected and separated by a second power supply plug 21 for keeping warm, and the lower device 1 is equipped with a timer device 3 for setting the rice cooking start time. In the device in which power is applied to the lower device through the first plug, the heat-retaining circuit of the upper device 2 is a heat-retaining circuit that performs a heat-retaining operation when the power is turned on, and the normally closed output contact 31 of the timer device 3 is connected to the first plug. 2. A timer rice cooker inserted into an electricity supply circuit to a connected part on the lower device 1 side to which a power plug 21 is connected.