JPS6243458Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric rice cooker with a timer, such as an electric jar rice cooker, in which a timer is attached to the rice cooker.In particular, when setting the desired rice cooking start time, the rice cooking circuit is set by the timer set lamp. This will be confirmed by

In an electric rice cooker with a timer that automatically starts cooking rice after the desired time has been reached, after setting the timer to the desired rice cooking start time, the rice cooking thermostat is switched and connected to the rice cooking heater side to complete the setting. However, as mentioned above, since two operations are required, it is easy to forget one operation.For example, if you forget to set the timer, the rice will start cooking immediately, and if you forget to set the rice cooking thermostat, the rice will start cooking after the desired time has been reached. The problem was that it kept warm and cooked half-cooked rice.

Also, recently, after rice cooking is completed, a timer is activated to start cooking after a certain period of time has elapsed, but if such a rice cooker is equipped with a timer that starts cooking after the above-mentioned desired time has been reached, This has the disadvantage that the circuit becomes considerably complicated, and a switch is required to prevent the timer set lamp from being erroneously lit, making the wiring complicated.

As mentioned above, the present invention is equipped with a timer set lamp that lights up when the desired rice cooking start time is set, the main circuit is turned off by the timer switch, the rice cooking circuit is formed by the rice cooking thermostat, and the lamp switch of the steaming indicator lamp is turned off. A timer set lamp circuit is constructed using the OFF state of the lamp switch circuit. The drawings will be explained below. _H1 is a heater that heats a pot (not shown), TH is energized to be in close contact with the pot, senses a predetermined temperature of the pot when rice cooking is completed, and connects a movable contact THa in series to one end of the heater _H1. The rice cooking thermostat _H2 , which is switched and connected from the first contact THb on the rice cooking circuit side to the second contact THc on the steaming circuit side using the auxiliary heater (described later), was set so that the temperature of the pot was maintained at approximately 70 degrees. A steaming and warming heater consisting of a first auxiliary heater Ha and a second auxiliary heater Hb connected in series to the thermal reed switch TR, and this parallel circuit connects the movable contact THa and the first contact THb of the rice cooking thermostat TH.
connected between. T is a timer device that measures time by energizing, and is a timer switch that connects the movable contact TSa to one timer contact TSb by setting the desired time, and turns on the circuit even if the movable contact TSa is connected to the other timer contact TSC after the desired time has been reached.
TS, movable contact SLa, and two switching contacts SLb, SLc
After the rice cooking starts, the movable contact SLa is switched from the first switching contact SLb connected to the first contact THb of the rice cooking thermostat TH to the second switching contact SLc connected to the second contact THc of the rice cooking thermostat TH. A changeover switch SL is operated, and an additional cooking switch RS is turned on after a certain period of time has passed after rice cooking is completed to energize the heater and perform additional cooking.
The operation of each switch is performed by a timer motor TM that turns on the switch corresponding to each stroke for a predetermined time based on a preset time. The additional cooking switch RS is heater _H1
and the additional cooking selection switch SRS.
In other words, the additional cooking switch RS and the additional cooking selection switch
The series circuit of SRS is connected between the movable contact THa and the first contact THb of the rice cooking thermostat TH.
The other end of the heater _H1 is connected to the other timer contact TSc of the timer switch TS. The timer motor TM is the movable contact SLa of the changeover switch SL.
and is connected to the movable contact TSa of the timer switch TS. PS is a lamp switch that is linked to the rice cooking thermostat TH, which switches from the first contact THb to the second contact of the rice cooking thermostat TH when rice cooking is completed.
Along with the switching connection to THc, the movable contact PSa connected to the movable contact SLa of the changeover switch SL is switched from one fixed contact PSb to the other fixed contact PSc and turned ON.
shall be. PL ₁ is a timer set lamp connected between one timer contact TSb of the timer switch TS and one fixed contact PSb of the lamp switch PS, and is lit only when the desired time is being counted. of the circuit
OFF, i.e. movable contact TSa and one timer contact
TSb ON and rice cooking thermostat TH movable contact
The movable contacts of the changeover switch SL and lamp switch PS, in which the movable contact SLa and the first switching contact SLb are always connected in the ON and initial state of THa and the first contact THb.
Lights up when PSa and one fixed contact PSb are turned on.
PL ₂ is a cooking indicator lamp connected in parallel to the heater H ₁ , PL ₃ is a steaming indicator lamp connected between the other timer contact TSc of the timer switch TS and the other fixed contact PSc of the lamp switch PS, PL ₄
is between the second contact THc of the rice cooking thermostat TH and the other fixed contact PSc of the lamp switch PS, that is, the heat retention indicator lamp is placed in parallel with the heat retention heater _H2 , SW is the power switch, F is the temperature fuse, and V is an AC power source.

Next, start cooking rice after the desired time has been reached based on the operation shown in Figures 1 and 2. If you want to perform additional cooking after the rice has been cooked, turn on the power switch SW and additional cooking selection switch SRS, and turn on the rice cooking thermos. Set the thermostat TH, switch the movable contact THa to the first contact THb on the rice cooking circuit side, and switch the lamp switch PS in conjunction with the rice cooking thermostat TH.
Switch and connect the movable contact PSa to one fixed contact PSb. Then, when the timer device T is operated to set the desired time, the movable contact TSa of the timer switch TS is switched to one of the timer contacts TSb, and the timer set lamp PL ₁ is connected to the movable contact TSa of the timer switch TS and one of the timer contacts TSb. timer contacts
TSb and one fixed contact PSb of lamp switch PS
, the movable contact PSa, and the movable contact of the changeover switch SL
SLa and first switching contact SLb, rice cooking thermostat
It is turned on via the first contact THb of TH, the movable contact THa, the power switch SW, and the temperature fuse F. At this time, the heater _H1 is cut off by turning off the movable contact TSa of the timer switch TS and the other timer contact TSc, and the timer motor TM is turned off by the movable contact SLa of the changeover switch SL, the first changeover contact SLb, and the first changeover contact of the rice cooking thermostat TH. Single contact THb and movable contact
Start timing operation via THa, power switch SW, and temperature fuse F. Eventually, when the timer device T reaches the desired time, the timer switch
The movable contact TSa of the TS is switched and connected from one timer contact TSb to the other timer contact TSc, turning off the timer set lamp PL ₁ and energizing the heater H ₁ via the rice cooking thermostat TH and timer switch TS to heat the pot. The rice cooking status is indicated on the rice cooking indicator lamp PL ₂ . At this time, the timer motor TM continues to operate, and when approximately 7 minutes have passed after the start of rice cooking, the movable contact SLa of the changeover switch SL is switched from the first changeover contact SLb to the second changeover contact SLc, and the timer motor TM is switched on. After the electricity is turned off and the rice cooking is completed, the timer device T is prepared to operate for a predetermined period of time to turn on the additional cooking switch RS. When the temperature of the pot rises rapidly and cooking is completed, the rice cooking thermostat TH senses the predetermined temperature of the pot and changes the movable contact THa from the first contact THb on the rice cooking circuit side to the second contact THc on the steaming circuit side. Switch the connection and cut off the power to the heater H ₁ , and switch the timer motor TM to the movable contact THa and second contact THc of the rice cooking thermostat TH, and the changeover switch SL.
The steaming time is measured through the second switching contact SLc and the movable contact SLa. On the other hand, the additional cooking switch RS, which was in the ON state approximately 7 minutes after the start of rice cooking, is turned OFF almost at the same time as the rice cooking is completed. Eventually, after a certain period of time has passed in which the temperature of the pot has dropped due to the power outage of heater H ₁ , the additional cooking switch RS is turned on and heater H ₁ is turned on again within the steaming time.
SW, additional cooking selection switch SRS, additional cooking switch
RS, other timer contact of timer switch TS
Electricity is applied through TSc and the movable contact TSa, and the pot is heated for about 1~
Cook for 2 minutes. Then, approximately 20 minutes after the completion of rice cooking, the movable contact SLa of the changeover switch SL switches from the second changeover contact SLc to the first changeover contact SLb, stopping the operation of the timer device T and entering the warming process. On the other hand, after the rice is cooked, turn on the rice cooking thermostat.
A movable contact PSa is connected to TH and the thermostat.
The steam indicator lamp that was lit by the lamp switch PS connected to the other fixed contact PSc.
PL ₃ is turned off by the connection between the movable contact SLa of the changeover switch SL and the first changeover contact SLb. In the heat retention process, the heat retention heater H ₂ and the heat retention indicator lamp PL ₄ are connected in parallel via the rice cooking thermostat TM, the lamp switch PS, and the changeover switch SL, and the heat retention indicator lamp PL ₄ lights up and the thermal reed switch TR is switched on. Keep the temperature of the pot at about 70 degrees.

As mentioned above, the present invention includes a heater that heats a pot,
The rice cooking thermostat detects the predetermined temperature of the pot when rice cooking is complete and switches from the rice cooking circuit to the steaming circuit, and the main circuit is activated by setting the desired rice cooking start time.
The timer switch is turned OFF and then turned ON after the desired rice cooking start time is reached, and the time measurement operation is started in conjunction with the switching operation of the rice cooking thermostat after rice cooking is completed, and after a certain period of time has elapsed, the additional cooking switch is turned ON to energize the heater. a timer device that performs additional cooking; a lamp switch that is linked to the thermostat and turns ON to light a steaming indicator lamp when the steaming circuit is switched; and a main circuit that is controlled by the timer switch by setting the desired rice cooking start time of the timer device. The timer set lamp consists of the setting of the desired rice cooking start time by the timer device and the setting of the desired rice cooking start time by the timer device and the setting of the rice cooking thermostat. It will not turn on unless both of the settings on the rice cooking circuit side are performed, and the disadvantages of forgetting to operate one of them can be prevented. Further, since the timer set lamp is provided between the timer switch of the timer device and the lamp switch linked to the rice cooking thermostat, there is no need to provide a separate switch for the timer set lamp. In addition, the timer set lamp is connected using the timer switch of the timer device that also performs additional cooking operation and the lamp switch of the steaming indicator lamp that is linked to the rice cooking thermostat, so if it lights up at the same time as the steaming indicator lamp, it will not start and the timer will not turn on. The influence of malfunctions on other circuits due to the setting of the desired wearing time is eliminated.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of an electric rice cooker with a timer according to the present invention, and FIG. 2 is a time chart showing the operation of each part. H ₁ ...Heater, TH...Rice cooking thermostat, _H2 ...Steaming, warming heater, T...Timer device, TS...Timer switch, RS...Additional cooking switch, PS...Lamp switch, PL ₁ ... …
Timer set lamp, PL ₃ ...Steaming indicator lamp.

Claims (1)

[Scope of utility model registration request] A heater that heats the pot, a rice cooking thermostat that detects the predetermined temperature of the pot when rice cooking is completed and switches from the rice cooking circuit to the steaming circuit, and turns off the main circuit depending on the desired rice cooking start time and starts the desired rice cooking. A timer switch is turned on when the time reaches the specified time, and a timing operation is started with the switching operation of the rice cooking thermostat after rice cooking is completed, and after a certain period of time has elapsed, an additional cooking switch is turned on to energize the heater to start additional cooking. The timer device is linked to the rice cooking thermostat and turns on when the steaming circuit is switched on.
A lamp switch that turns on the steaming indicator lamp, and a lamp switch that turns off the main circuit by setting the desired rice cooking start time on the timer device, turns off the rice cooking circuit side with the rice cooking thermostat, and lights up when the lamp switch turns OFF. An electric rice cooker with a timer and a timer set lamp.