KR910004523Y1 - Cooking-vessels - Google Patents

Abstract

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Description

Rice cooker with timer

1 is a conceptual diagram of the present invention.

2 is an explanatory diagram of an embodiment of the present invention.

3 is an explanatory diagram of a conventional example.

* Explanation of symbols for main parts of the drawings

4: switching switch 31: display device

33: Reserved time memory

The present invention relates to a rice cooker, especially a rice cooker having a timer for starting a cooking operation at a desired time by an assembled timer, wherein the display unit displaying the set time of the timer is displayed as necessary to display the temperature in the rice cooker. It is intended to simplify the inspection of the instrument.

As this kind of rice cooker, for example, as shown in FIG.

In the illustration, a so-called three-dimensional rice cooker used for business purposes is an indicator for displaying the time set by the cooking switch 2, the timer operation switch 3, and the timer operation switch 3 on the operation unit 1 on the front of the appliance ( 31) is excreted.

This is stored in the reserved time storage device (not shown) when the desired time to be cooked by the timer operation switch 3 is stored, and the contents of the memory are displayed on the display device 3, and then the start switch 43 is turned on. The operation starts after the timer set time has elapsed.

In the case of a commercial rice cooker with a large amount of rice, there is a case that the instrument is repaired and inspected in order to maintain the safety of the instrument.

By the way, the said conventional thing had a problem that repair and inspection of a rice cooker were complicated.

This is because, in the case of the above conventional ones, a special inspection device for measuring the internal temperature of the rice cooker is required when carrying out a repair inspection of the apparatus.

In other words, when the rice cooker is repaired, the control operation of the mechanism that makes the gas burner light on fire or extinguishes the gas cooker when the internal temperature of the rice cooker reaches a certain temperature is checked centrally.

As a result, the relationship between the internal temperature of the cooker and the calorific value of the gas burner is confirmed.

In the conventional work, the inspection work requires a change in the state of the gas burner to be made smaller and extinguishes, and a thermal element installed on the outer bottom of the rice cooker when this state change occurs. I must regulate the temperature in the pot by measuring the output of a tester.

That is, in the case of the conventional one, a special inspection device such as a tester for measuring the temperature in the pot at the time of repair inspection, and a special measurement work using the same, and the maintenance work of the rice cooker is complicated.

According to the present invention, a timer for cooking reservation, a reservation time storage device for storing the time set in the timer, and an indicator for displaying the contents of the reservation time storage device to start cooking operation after the set time has elapsed ( In the rice-cooker with a timer ", the technical problem is that the temperature in the pot is displayed on the indicator 31 for a timer in accordance with necessity in order to easily perform a maintenance inspection work.

When describing the technical means of the present invention for solving the above problems while quoting the conceptual diagram shown in FIG. 1, the technical means of the present invention, "The thermal storage cabinet attached to the outer bottom of the rice cooker in the electric circuit to the indicator 31; An alternately switched switch 4 is inserted into the output circuit and the output circuit of the reserved time storage device.

The technical means has the following functions.

Normally, the changeover switch 4 is set on the reserved time storage device to bring the reserved time storage device and the indicator 31 into conduction, and the mechanism is operated in this state.

When the weak time is set as in the conventional method described above, the stored contents of the reserved time storage device are applied to the display 31 through the changeover switch 4 and displayed on the display 31.

Subsequently, when performing a repair inspection of the mechanism, the switching switch 4 is switched to the thermal element side, and the combustion operation of the mechanism is tested in this state.

Then, the output of the thermosensitive element indicating the internal temperature of the pot is applied to the indicator 31 through the switching switch 4 switched to the thermosensitive element side, and this indicator 31 confirms the displayed temperature display and the flame change of the gas burner. Check the instrument function and perform repairs.

In this way, according to the technical means of the present invention, by switching the switching switch 4, the temperature in the pot can be displayed on the display 31 as necessary.

The present invention has the following unique effects.

If necessary, since the internal temperature of the pot may be displayed on the indicator 31 for timer display, this operation is easy if a repair inspection is performed even without a special inspection device for inspecting the signal of the thermosensitive element for detecting the internal temperature of the pot.

Next, an embodiment of the present invention described above will be described with reference to the drawings.

As shown in FIG. 2, a heat sensing element 51 composed of a dummyster is attached to the gray bottom wall of the rice cooker 5, and the output of the heat sensing element 51 is the voltage / pulse conversion circuit 61 and the first-first. It is applied to a digital A / D converter 6 of 3 decimal counters 62 to 64.

The outputs of the first to third decimal counters 62 to 64 are provided through the first first gate 67 of the three state buffers 66 and 66. The third and second BCD seven segment decoders 55, 54, and 53 are separately applied, and each of the first to third decimal counters 62 to 64 is a row circuit 26. Is connected.

Further, each of the 7 segment LEDs 57 and 57 is separately connected to each of the BCD 7 segment decoders 52 to 55, and these 7 segment LEDs 57 and 57 and the respective BCD 7 segment decoders 52 are respectively connected. ), The indicator 31 is constituted by 55.

The first gate 67 is supplied with a Q output of a JK first flip-flop (hereinafter abbreviated as first JKFF) whose output is inverted each time the changeover switch 4 is operated. JKFF (41) The output is applied to the control input terminal of the second gate 34 provided between the indicator 31 and the reserved time storage device 33 described later.

The reserved time memory device 33 is composed of a binary counter 35, a fourth decimal counter 36, a sixth counter 37, and a fifth decimal counter 38, and the tenth binary counter. Reference numerals 36, binary counters 35, fifth decimal counters 38, and sixth binary counters 37 are connected by row circuits 26 and 26, respectively.

The fifth decimal counter 38 and the fourth decimal counter 36 constituting the reservation time storage device 33 are first and second timer switches 30 and 32 for setting the hour and minute. The output of the oscillator 39 is applied, and in this embodiment, the timer operation switch 3 is constituted by these first and second timer switches 30 and 32.

The first timer switch 30 is operated when the position of the "hours" is set and the second timer switch 32 is set in units of minutes.

The output of the second oscillator 39 via the first and second timer switches 30 and 32 is also applied to the timer 21, and the output of the second timer switch 32 for the minute set is a timer ( 21) and is applied to the UP input terminal 23 of the UP / DOWN counter 22 made of the 60-degree counter.

The output of the second oscillator 28 having a frequency of 1/60 Hz is applied to the DOWN input terminal 42 of the UP / DOWN counter 22 via the second AND circuit 17.

The output of the second JK flip-flop 44 is applied to the other input terminal of the second AND circuit 17, and the second JK flip-flop 44 is connected to the second OR circuit 45 via the second OR circuit 45. The output of the start switch 43 is applied.

On the other hand, the output of the first timer switch 30 for setting the "hour" unit in the timer operation switch 3 together with the output of the row raising circuit 29 of the UP / DOWN counter 22 described above. 1 is applied to the UP input terminal 27 of the binary counter 25 through the OR circuit 26, and the DOWN input terminal 14 of the binary counter 25 has the above UP / DOWN counter ( The output of the hang borrow circuit 15 in 22 is applied.

Lastly, the second AND circuit 16 which outputs the "H" signal when the above-described binary counter 25 and the UP / DOWN counter 22 together output the "O" signal is the start switch described above. And an output of the second AND circuit 16 is applied to an RS flip-flop (hereinafter abbreviated as RSFF) 47 and is connected to the 2 OR circuit 45 together with an output of the RSFF 47. The excitation coil 73 for the solenoid valve 71 for opening and closing the gas circuit to the gas burner 7 is turned ON and OFF by this.

In the initial state when the power is connected to the mechanism, the first JKFF 41 The output is in the "H" state, and the second gate 34 connecting the reserved time storage device 33 and the indicator 31 is in the open state by the application of the "H" signal.

In this state, when the first timer switch 30 is set to set the reservation time, the number of pulses oscillated by the second oscillator 39 while the first timer switch 30 is kept pressed is changed to the fourth decimal counter 36. ), When the binary counter 35 and the 24 binary counter 25 count and finish the operation of the first timer switch 30, the " hour " is applied to the fourth decimal counter 36 and the binary counter 35. The unit set time of is stored.

This storage time is displayed on the seven segment LEDs 57 and 57 via the first and second seven segment decoders 52 and 53.

Subsequently, when the second timer switch 32, which sets the "minute" unit of the reservation time, is pressed, the "minute" set as in the above time setting is set by the hex counter 37 and the fifth decimal counter 38. It is displayed on the seventh segment LEDs 57 and 57 through the third and fourth seventh segment decoders 54 and 55.

In addition, by the operation of the first timer switch 30 described above, the 24-digit counter 25 assembled in the timer control switch 3 counts down, and the set time is stored in the 24-digit counter 25, and the other time is set. When the timer switch 32 is operated, the unit of " minute " is stored in the UP / DOWN counter 22 in the same manner as the storage operation of the set time.

Then, when the start switch 43 is turned on in the time set state, the second JK flip-flop 44 starts to output the "H" signal, and at this point, the oscillation pulse of the second oscillator 28 is changed to the second AND circuit 17. Is applied to the UP / DOWN counter 22, and whenever there is this authorization signal, the UP / DOWN counter 22 and the binary counter 25 count and operate the UP / DOWN counter 22, 24. When the memory value of the gin counter 25 becomes "O" together, the second AND circuit 16 outputs a signal, and the RSFF 47 outputs a "H" signal, and then the excitation coil 73 for the solenoid valve 71. ) Is kept energized and the gas burner 7 starts to burn.

In other words, cooking is started.

Subsequently, when the internal temperature of the gas cooker 5 for checking the oil of the appliance is indicated by the indicator 31 in the above-mentioned cooking apparatus, the switching switch 4 may be re-inserted.

When the selector switch 4 is turned on, the first JKFF 41 The output is converted to " L " so that the second gate 34 is closed, whereby the circuit connecting the reserved time storage device 33 and the indicator 31 is cut off.

In addition, the first switch inserted into the circuit connecting the A / D converter 6 and the timer operation switch 3 is converted to " H " Gate 67 is opened.

The output of the thermosensitive element 51 converted to the digital quantity by the A / D converter 6 is then the seven segment LED 57, 57 of the indicator 31 via the first gate 67 in the open state. It is displayed as.

When the reserved setting time is displayed on the display 31, the switching switch 4 may be turned on again to invert the output of the first JKFF 41, and the output of the first JKFF 41 is reversed again. In this case, the Q output of the first JKFF 41 is returned to L, and the Q output is returned to the same state as in the initial cooking operation, and accordingly, the display 31 sets the reservation cooking time.

In the above embodiment, when the cooking operation starts, the cooking operation proceeds while a computer or the like (not shown) manages the output of the thermosensitive element 51 additionally installed on the outer bottom surface of the rice cooker 5 inside the appliance to boil the rice. will be.

Claims (1)

A cooking reservation timer for starting cooking operation after the set time has elapsed, a reservation time storage device for storing the time set in the timer, and an indicator 31 for displaying the contents of the reservation time storage device; In a rice cooker with a timer, a switching switch (4) is alternatively connected to an output circuit of a thermosensitive element and an output circuit of a reserved time memory device, which are additionally installed on the outer bottom surface of the rice cooker, in the electric circuit to the indicator 31. Rice cooker with one timer.