JPH0744882Y2 - Gas stove - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application field and outline of the invention] The invention of the present application relates to a gas stove capable of switching between cooked cooking in which a sticking prevention function is activated and fried food operation in which a fire prevention function is activated by operating a selector switch. When the timepiece is incorporated into the gas stove for cooking while controlling the time, or when the temperature adjusting device is incorporated for cooking while keeping the food at a constant temperature, these condition setting operations can be performed easily. It allows you to do it.

[0002]

2. Description of the Related Art Recently, a gas stove has become popular in which the temperature of a pot to be heated is monitored and, when it reaches an abnormal temperature, the gas burner can be kept in a fire extinguished state to ensure safety. As such a stove, for example, the one shown in FIG. 3 is known, and an operation changeover switch (11) and an ignition / fire extinguishing switch (12) are provided in the operation portion of the appliance, and the former operation changeover switch. By (11),
Low temperature temperature memory (13) and high temperature temperature memory (14)
The gates (17) and (18) respectively corresponding to the above are selectively opened. As a result, the temperature sensor (15) for detecting the temperature (usually 130 ° C. and 240 ° C.) stored in one of the temperature memories (13) and (14) and the temperature inside the pan (2). Is compared by the upper limit temperature comparator (26), and the comparison result is applied to the gas supply valve (23) via the AND circuit (21) to open and close it. Also, the ignition / fire extinguishing switch (12) described above.
Is also applied to the AND circuit (21).
In the following, the temperature stored in the low temperature side temperature memory (13) is referred to as a sticking prevention temperature, and the temperature stored in the high temperature side temperature memory (14) is referred to as a fire prevention temperature.

In this case, when the cooked food is cooked, the operation changeover switch (11) is operated to operate the low temperature temperature memory (1).
The gate (18) corresponding to 3) is opened, and in this state, the ignition / extinguishing switch (12) is pushed to perform the ignition operation. Then, the comparison signal of the upper limit temperature comparator (26) for comparing the burning temperature stored in the low temperature side temperature memory (13) with the detection temperature of the temperature sensor (15) is the operation signal of the ignition / fire extinguishing switch (12). AND circuit (2
1) and the AND circuit (21) outputs a valve opening signal. That is, the gas supply valve (23) is opened. In addition, an ignition device (not shown) operates in conjunction with the operation of the ignition / extinguishing switch (12), whereby the gas burner (25) enters a combustion state.

The pot (2) begins to burn due to forgetting to turn off the stove, which causes the temperature sensor (1
When the detected temperature of 5) reaches the non-sticking temperature (130 ° C.) stored in the low temperature side memory (13), a fire extinguishing request signal is output from the upper limit temperature comparator (26) and the gas supply valve (2
3) is closed, which keeps the gas burner (25) extinguished. That is, the cooking operation can be performed without the risk of burning. Further, in the above-mentioned one, the operation changeover switch (11) is operated to operate the high temperature side temperature memory (1
When the gate (17) corresponding to 4) is opened, fried food can be cooked. If the inside of the pan (2) exceeds 240 ° C as a fire prevention temperature during cooking of the fried food, the upper limit temperature comparator ( A fire extinguishing request signal is issued from 26) and the gas burner (25) is maintained in a fire extinguishing state. As described above, in the above-mentioned conventional one, boiling cooking with a non-stick function or fried food with a fire prevention function can be selected by switching the operation changeover switch (11). Appropriate and safe cooking can be done.

However, when a timer boiled and cooked, which has been recently demanded, that is, when a timer device is incorporated in a device for performing a boiled cooking operation while controlling the time, there is a problem that the preparation operation for the timer boil is complicated. That is,
In the case of cooking with a timer, in addition to the timer setting operation, an operation of switching the operation changeover switch (11) to the cooking side is required, and the operation becomes complicated only by the operation of switching the operation changeover switch (11). Of.

<Regarding the Invention of Claim 1> The invention of Claim 1 is made in view of the above-mentioned points. The temperature sensor (15) for detecting the temperature of the pot (2) and the non-sticking temperature are provided. A low temperature side memory (13) for storing and a high temperature side memory (14) for storing a fire prevention temperature higher than this, and one of the low temperature side memory (13) or the high temperature side temperature memory (14) are selected. The operation changeover switch (11), the storage temperature of the one temperature memory (13) (14) selected by the operation changeover switch (11), and the temperature sensor (15)
In the case of incorporating a timer cooking function into the stove in a gas stove equipped with an upper limit temperature comparator (26) which outputs a fire extinguishing request signal of the gas burner (25) when the latter detected temperature is high. Also, it is an object of the present invention to make it possible to easily carry out a preparatory operation for the timer boiling.

[0007]

[Technical Means] The technical means of the invention according to claim 1 for solving the above-mentioned problems is to set a timer switch (32) to be turned on for cooking while controlling time and a cooking time. Time setting means (31), a timepiece device (4) that outputs a timeup signal when the time set by the time setting means (31) has elapsed, and a timeup signal of the timepiece device (4) or an upper limit temperature comparison Gas burner (25) when any of the fire extinguishing request signals of the fire vessel (26) occurs
A determination circuit (50) for extinguishing the fire and a priority circuit (60) for prioritizing the ON signal of the timer switch (32) over the switching signal of the operation switching switch (11) are provided, and by the output of the priority circuit (60) Low temperature memory (13)
Is connected to the upper limit temperature comparator (26). "

[0008]

The above technical means operates as follows. When the timer switch (32) is turned on, the ON signal is applied to the priority circuit (60) and the priority circuit (6).
By the output of 0), the low temperature side memory (13) is connected to the upper limit temperature comparator (26). That is, the non-sticking temperature stored in the low temperature side memory (13) and the pot internal temperature detected by the temperature sensor (15) are compared by the upper limit temperature comparator (26). Thereby, the burning in the pan (2) is monitored, and when the inside of the pan (2) is heated to the burning prevention temperature stored in the low temperature side memory (13), the upper limit is set in the same manner as the conventional one. A fire extinguishing request signal is output from the temperature comparator (26). On the other hand, when the timer switch (32) is operated, the time setting means (3
The timepiece device (4) monitors the arrival of the heating time set in 1), and the timepiece device (4) outputs a time-up signal to the platform where the heating time has elapsed.

According to the above technical means, the extinguishing request signal of the upper limit temperature comparator (26) or the time of the timepiece device (4) is output when the inside of the pot (2) exceeds the non-sticking temperature. When any one of the up signals is generated, the gas burner (25) is extinguished by the signal of the determination circuit (50) indicating this state, so that it is possible to prevent charring of the boiled cooking and also to boil the cooked cooking. Can be done while managing the time. In addition, do not operate the timer switch (32).
When the operation changeover switch (11) is operated in the FF state), the same signal as that of the operation changeover switch (11) is output from the priority circuit (60). (13) or high temperature temperature memory (1
The temperature stored in 4) is selectively compared with the temperature signal of the temperature sensor (15) that detects the temperature inside the pan, and normal cooking and fried cooking without operating the clock device (4) can be performed.

[0010]

The device of claim 1 has the following unique effects. When the timer switch (32) is operated, the non-sticking temperature (usually about 130 ° C) is compared with the temperature in the pan (2) detected by the temperature sensor (15). The timer switch (32)
In addition to the above operation, the operation for switching the operation changeover switch (11) to the low temperature side memory (13) is not necessary, and the operation for the timer cooking is simplified by the operation for the operation changeover switch (11). .

<Regarding the invention of claim 2> The invention of claim 2 is the method of claim 1 in which the timer boiled cooking is being performed.
It is an object of the present invention to enable fried food cooking while maintaining the effectiveness of the timer function, thereby realizing various heating operations.

[0012]

According to the technical means of the invention of claim 2 for solving the above-mentioned problems, "in the invention of claim 1, a timer operation signal holding means (34) for holding an operation signal of a timer switch (32), A fire prevention signal generation circuit (6) is provided which outputs a fire prevention signal when the operation changeover switch (11) is operated while the holding means (34) holds the operation signal of the timer switch (32). When a fire prevention signal is output from the fire prevention signal generation circuit (6), a high temperature side temperature memory (14) for storing the fire prevention temperature
Is connected to the upper limit temperature comparator (26) side. ”

[0013]

[Operation / Effect] The above technical means has the following operation / effect. Similar to the invention of claim 1, the timer switch (3
When the timer cooking operation is started by operating 2), the temperature inside the pan (2) detected by the temperature sensor (15) and the non-sticking temperature stored in the low temperature side temperature memory (13) are the upper limit temperature comparator ( 26), and the heating operation proceeds in this state. The heating operation continues until the timepiece device (4) times out. On the other hand, the timer switch (3
When 2) is operated, the operation signal is held by the timer operation signal holding means (34), and the operation signal of the timer switch (32) held by the timer operation signal holding means (34) is operated. Changeover switch (1
It is monitored by the fire prevention signal generation circuit (6) together with the output of 1). When the operation changeover switch (11) is operated during the timer boiling operation, a fire is generated by the operation signal and the output of the timer operation signal holding means (34) (operation signal of the timer switch (32)). The prevention signal generation circuit (6) outputs a fire prevention signal. Then, the high temperature side memory (14) is connected to the upper limit temperature comparator (26) by the fire prevention signal.

That is, the temperature inside the pan (2) detected by the temperature sensor (15) is the fire prevention temperature stored in the high temperature side temperature memory (14) (the nonsticking temperature stored in the low temperature side temperature memory (13)). Fried food can be cooked by performing a normal heating operation until the temperature rises to a higher temperature.
Then, during the combustion operation, the timepiece device (4) is maintained in the operating state by the operation signal of the timer switch (32) which is turned on at the beginning of the operation of the instrument, and therefore the timepiece device (4) is set. The fried food can be cooked until the lapsed time passes, and the fried food can be cooked under time management.

<< Regarding the Invention of Claim 3 >> The invention of Claim 3 is, like the invention of Claim 1, intended to improve the operability of the stove. In the above-described conventional stove, when the temperature adjusting device for cooking the fried food while keeping the pan (2) at a constant temperature is incorporated in the appliance, there is a problem that the preparation operation for the fried food becomes complicated. That is, when the fried food is cooked under temperature control, the operation changeover switch (1
It is necessary to perform the operation of switching 1) to the fried food cooking side, and the operation becomes complicated as much as the operation switching switch (11) needs to be switched.

According to the third aspect of the present invention, the temperature sensor (15) for detecting the temperature of the pot (2), the low temperature side memory (13) for storing the non-sticking temperature and the fire prevention temperature higher than this are stored. The high temperature side temperature memory (14) for storing the low temperature side temperature memory (13) or the high temperature side temperature memory (1
4) The operation changeover switch (11) for selecting one, the storage temperature of the one temperature memory (13) (14) selected by the operation changeover switch (11) and the detected temperature of the temperature sensor (15) In the gas stove equipped with an upper limit temperature ratio shark (26) that outputs a fire extinguishing request signal of the gas burner (25) when the detected temperature of the latter is high, while maintaining a constant temperature in the pan (2) Even when a temperature adjusting function for heating this is incorporated into an appliance, it is an object to make it possible to easily perform a preparatory operation for cooking fried foods while using the temperature adjusting function.

[0017]

[Means for solving the problems] The technical means of the invention of claim 3 for solving the above-mentioned problem is, "A temperature control switch (51) to be turned on when cooking under temperature control and a temperature setting for setting a heating temperature". The temperature signal output from the temperature setting device (52) and the signal indicating the temperature in the pan (2) detected by the temperature sensor (15) are compared with each other and the heating suppression signal is output when the latter is large. A temperature control comparator (28) and a gas amount controller (54) for restricting the gas supply amount to the gas burner (25) by a heating suppression signal of the temperature control comparator (28) are provided, and a temperature sensor is provided. Gas supply when a fire extinguishing request signal is output from an upper limit temperature comparator (26) that compares the temperature inside the pan (2) detected by (15) with the fire prevention temperature stored in the high temperature side temperature memory (14). Close the valve (23) to put out the gas burner (25) While lifting, further, it was "it to the high-temperature side temperature memory (14) leads to the upper limit temperature comparator (26) when the temperature control switch (51) is operated.

[0018]

[Operation / Effect] The above technical means operates as follows.
When the temperature control switch (51) is operated, the high temperature side temperature memory (14) is connected to the upper limit temperature comparator (26) and the fire prevention temperature and temperature sensor stored in the high temperature side temperature memory (14). The temperature inside the pan detected by (15) is compared by the upper limit temperature comparator (26). And the pot (2)
When the internal temperature reaches the fire prevention temperature stored in the high temperature side temperature memory (14), a fire extinguishing request signal is output from the upper limit temperature comparator (26) as in the conventional case, and the fire extinguishing is performed. The request signal causes the gas supply valve (23) to close and the gas burner (25) to remain extinguished.

On the other hand, when the temperature control switch (51) is operated, the heating temperature set in the temperature setter (52) and the temperature detected by the temperature sensor (15) (temperature in the pan (2)).
Are compared by the temperature control comparator (28), and when the temperature detected by the latter temperature sensor (15) becomes high, a heating suppression signal is output from the temperature control comparator (28). The gas amount controller (54) operates to suppress the heat generation amount of the gas burner (25). Also, the pot (2)
When the temperature inside becomes lower than the heating temperature set in the temperature setter (52), the gas amount controller (54) returns to the initial state again to raise the temperature in the pan (2), To keep the temperature constant.

In this manner, when the temperature control switch (51) is operated, the fire prevention temperature stored in the high temperature side temperature memory (14) is compared with the temperature in the pan (2) detected by the temperature sensor (15). Therefore, it is not necessary to operate the operation changeover switch (11) other than the temperature control switch (51), and the operation can be simplified as much as the operation of the operation changeover switch (11) is unnecessary.

[0021]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, a power switch (71), an ignition / fire extinguishing switch (72), and an operation changeover switch (11) for switching the heating operation between cooking and fried food are provided on the operation unit on the front of the stove body (7). ) Is provided. Further, a temperature control switch (51) that is operated when cooking fried food under temperature control is arranged near the operation changeover switch (11), and below the temperature control switch (51). Is provided with a temperature increase button (56) for adjusting the set temperature to the high temperature side and a temperature decrease button (57) for adjusting the set temperature to the low temperature side. Further, a timer switch (32) and a time setting button (30) for setting a timer time are provided near the temperature control switch (51), and a display section (58) showing the timer setting time and the heating temperature. ) Is provided.

On the upper surface of the stove body (7),
Gas burner (25) (25) surrounded by 0) (10)
And a temperature sensor (15) (15) projecting in the center of this
Are provided, and the above-mentioned components are wired as shown in FIG. The output of the operation changeover switch (11) is the first T
Flip-flop (hereinafter referred to as the first TFF) (61)
Via the priority circuit (6
0) and the tenth R circuit (62)
Is applied to one input terminal of the first AND circuit (63). The output of the first AND circuit (63) corresponds to the low temperature side memory (13) that stores the non-sticking temperature (130 ° C. in this embodiment) of the pan (2) when cooking and cooking. The output of the first AND circuit (63) is applied to the first inverting circuit (66) while being applied to the first gate (64). The output of the first inverting circuit (66) is the second gate (65) corresponding to the high temperature side memory (14) that stores the fire prevention temperature (240 ° C. in this embodiment) when cooking fried food.
Is being applied to.

The outputs of the temperature memories (13) and (14) via the first and second gates (64) and (65) are the pot (2).
It is applied to the upper limit temperature comparator (26) together with the temperature sensor (15) for detecting the internal temperature, and the output of the upper limit temperature comparator (26) is applied to one input part of the second AND circuit (67). Further, the gas supply valve (23) inserted in the gas circuit to the gas burner (25) is opened and closed by the output of the 2AND circuit (67).

On the other hand, the output of the operation changeover switch (11) is output together with the output of a fourth T flip-flop (hereinafter abbreviated as fourth TFF) (35) which holds the output of a timer switch (32) described later, and a third AND circuit. (68) and the output of the third AND circuit (68) is the first SR
Flip-flop (hereinafter abbreviated as first SRFF)
It is applied to the set input terminal of (69). And
In this embodiment, the fourth TFF (35) corresponds to the timer operation signal holding means (34) described at the top of the above-mentioned technical means. The output of the first SRFF (69) is applied to one input terminal of the above-mentioned first AND circuit (63) via the fourth AND circuit (73). And
In this embodiment, the third AND circuit (68), the first SRFF (69) and the fourth AND circuit (73) described above correspond to the fire prevention signal generation circuit (6) according to the technical means of claim 2. is doing.

Next, the output of the ignition / fire extinguishing switch (72) is applied to a second T flip-flop (hereinafter abbreviated as second TFF) (74) and the second TFF is also applied.
The Q output of (74) is applied to the 2AND circuit (67) for opening and closing the gas supply valve (23) described above. It is applied to the reset input terminal of the first SRFF (69) which constitutes the update (6). As a result, when the ignition / extinguishing switch (72) is operated to extinguish the fire, the first differentiating circuit (7
5) is checked.

The output of the timer switch (32) corresponds to the ignition / extinguishing switch (72) described above. The output of the AND circuit (77) is applied to the load input terminal of the first UP / DOWN counter (78) forming the timepiece device (4). Further, the time setting means (3) is connected to the UP input terminal (81) of the first UP / DOWN counter (78).
The time setting button (30) constituting 1) is connected, and the other DOWN input terminal (82) has a sixth
The output of the AND circuit (84) is applied, and the sixth AND circuit (84) holds the operation signal of the ignition / fire extinguishing switch (72) and the signal of the second TFF (74) and the timer switch (32). The fourth TFF (35) for holding the operation signal of and the respective outputs of the oscillation circuit (83) are applied. Further, the output of the initial time memory (85) for storing the initial set time of "20 minutes" is applied to the data input terminal (80) of the first UP / DOWN counter (78), and the first UP / DOWN counter (78) is also applied. The output of the / DOWN counter (78) is applied to the seventh AND circuit (86) which outputs an "H" signal as a fire extinguishing request signal when the output becomes "0". The output of the first UP / DOWN counter (78) is displayed on the display unit (58), and the output of the display unit (58) and the first UP / DOWN counter (78).
A third gate (8) is provided between the output of the N counter (78).
7) is interposed. Further, in this embodiment, the oscillation circuit (83), the sixth AND circuit (84), the first UP
/ DOWN counter (78) and seventh AND circuit (8
6) and the like correspond to the timepiece device (4) described in the technical means of claim 1.

Further, the output of the timer switch (32) is applied to the fourth TFF (35) corresponding to the timer operation signal holding means (34) described in the technical means of the first claim, and The Q output of the fourth TFF (35) is applied to the tenth R circuit (62) together with the output of the first TFF (61) holding the operation signal of the operation changeover switch (11) described above. The reset terminal of the fourth TFF (35) is connected to the operation signal of the ignition / fire extinguishing switch (72). Path (89) is connected to the clock input terminal of the third TFF (76). The Q output of the third TFF (76) and the output of the timepiece device (4) described above are connected to the 2R circuit (91) via the 20R circuit (91) to open and close the gas supply valve (23).
It is applied to the D circuit (67). Then, in this embodiment, the second AND circuit (67) corresponds to the determination circuit (50) of claim 1. Also, the Q of the third TFF (76)
The output is the ninth AND with the output of the temperature setting comparator (52) and the temperature control comparator (28) for comparing the temperature in the pan (2).
It is applied to the 30th R circuit (93) through the circuit (92). Then, the bypass valve (59) for opening and closing the bypass circuit (46) formed in the gas circuit to the gas burner (25) is opened and closed by the output of the 30th R circuit (93). The bypass circuit (4
Orifice (4) inserted in the circuit bypassed by 6)
5) and the bypass valve (59) correspond to the gas quantity controller (54) in the technical means of claim 3.

The temperature setting device (52) described above is the second UP.
/ DOWN counter (79) (configurable to set the temperature in the range of 130 ° C to 210 ° C) and the second UP /
It is composed of a temperature increase button (56) and a temperature decrease button (57) for operating the set value of the DOWN counter (79), and the output of the second UP / DOWN counter (79) is transmitted to the display section (58). The fourth gate (88) is inserted between them. The fourth gate (88) is interposed between the third TFF (76) holding the operation signal of the temperature control switch (51) and the display section (58) displaying the set time, and the third gate (87) is interposed.
The third TFF (87) is selectively opened and closed to display either the set time of the timepiece device (4) or the set temperature of the temperature setter (52) on the display unit (58). -ing

The voltage on the T input terminal (47) side of the third TFF (76) is grounded via the transistor (48). The base of the transistor (48) is ignited and extinguished. It is applied to the 30th R circuit (93) for opening and closing the bypass valve (59). Next, the actual use of the stove body (7) of the embodiment of the present invention will be described.
First, the timer boiled cooking using the timer heating function and the non-sticking function will be described. When the power switch (71) shown in FIG. 1 is turned on, power is supplied to each part.

Since the temperature control switch (51) is not turned on in this state, the temperature control switch (51) is not turned on. When the timer switch (32) is turned on while the power is being applied to the fifth AND circuit (77),
The AND circuit (77) outputs an "H" signal, which causes
The first UP / DOWN counter (78) that constitutes the timepiece device (4) has the value "2" set in the initial time memory (85).
The default time of "0 minutes" is read. To change this time, press the time setting button (30) and
The set value of the P / DOWN counter (78) may be changed.

The first UP / DOWN counter (78)
When the value of the initial time memory (85) is read in, the heating time is output from the first UP / DOWN counter (78) and is transmitted to the third gate (87). Then, as described above, the third TFF (76) (because of this, the third gate (87) is opened and the first UP / D is
The heating time output by the OWN counter (78) is displayed on the display unit (58). Also, timer switch (32)
Signal (H) of the fourth TFF (35) holding the operation signal of
Is in the state 1A) through the 10R circuit (62).
While being applied to the ND circuit (63), the first AND circuit (63) has a third TFF (76) (temperature control switch (5
Corresponding to 1)) In this state, the fire prevention signal generation circuit (6) also outputs the "H" signal, so that the first AND circuit (63)
All the two inputs are in the “H” state and the first AND circuit (6
3) also outputs the "H" signal. Then, "130
The first gate (64) corresponding to the low temperature side memory (13) for storing “° C.” is opened, and the non-sticking temperature is applied to one input terminal of the upper limit temperature comparator (26). As a result, it is monitored whether or not the temperature in the pan (2) detected by the temperature sensor (15) rises above the non-sticking temperature. And still the gas burner (25)
In this state, the temperature sensor (1
Since the temperature in the pan (2) detected by 5) is lower than the above-mentioned non-sticking temperature, the "H" signal is output from the upper limit temperature comparator (26) which compares these temperatures. This completes the setting operation of the timer boiled rice. Thus, according to the above, the timer switch (32)
The timer boiling operation is completed simply by operating the, and the operation changeover switch (11) other than the timer switch (32)
There is an advantage that a separate operation for setting the low temperature side temperature memory (13) to be connected to the upper limit temperature comparator (26) by operating is unnecessary. And this advantage corresponds to the effect of the invention of claim 1.

Next, when the ignition / fire extinguishing switch (72) is operated, the Q signal of the second TFF (74) holding the operation signal of the ignition / fire extinguishing switch (72) becomes the "H" state. Then, the “H” signal and the “H” signal of the timepiece device (4) that has already been output are applied to the 2AND circuit (67), and further, the 2AND circuit (67) further has the above-described upper limit. The "H" signal of the temperature comparator (26) is applied,
As a result, the gas supply valve (23) is opened and gas is supplied to the gas burner (25). In addition, the ignition
When the fire extinguishing switch (72) is turned on, an igniter (not shown) operates, whereby the gas burner (25) enters a combustion state.

Next, when the inside of the pan (2) reaches "130 ° C." as the non-sticking temperature, the output of the low temperature side memory (13) which outputs a signal indicating the non-sticking temperature and the inside of the pan (2). The "L" signal is output from the upper limit temperature comparator (26) that compares the output of the temperature sensor (15) that detects the temperature, whereby the 2AND circuit (67) outputs the "L" signal and the gas supply valve. (23) is kept closed. That is, the operation of preventing burning can be realized. Further, while the cooking operation is proceeding properly, the first UP / DOWN counter (78) performs the countdown operation by the periodic signal of the sixth AND circuit (84) which outputs a signal synchronized with the output of the oscillation circuit (83). Continue, 1st UP /
When the time set in the DOWN counter (78) elapses, the output of the first UP / DOWN counter (78) becomes "0", and the "L" signal is output from the seventh AND circuit (86). Then, the "L" signal is also output from the 20th R circuit (91), and the upper limit temperature comparator (2
The 2AND circuit (67) is "L" regardless of the signal of 6).
A signal is issued and the gas supply valve (23) is closed.
This completes the timer boiled cooking.

Further, during the timer cooking operation, the third AN forming the fire prevention signal generating circuit (6) is formed.
The Q of the fourth TFF (35) for holding the operation signal of the timer switch (32) is provided at one input of the D circuit (68).
Since the signal (H signal) is applied, if the operation changeover switch (11) is turned on in this state, the third AN
The D circuit (68) outputs the "H" signal and the first SRFF (6
9) also outputs the "H" signal. Then, the output of the fourth AND circuit (73) changes to the "L" state, and the first AND circuit (63) outputs the "L" signal. This allows
The second gate (65) corresponding to the high temperature side temperature memory (14) storing “240 ° C.” as the fire prevention temperature is opened, and the fire prevention temperature and the temperature detected by the temperature sensor (15) are the upper limit temperature comparator ( It becomes the state compared in 26). That is, the fried food can be cooked by heating the pot (2) at a temperature lower than the fire prevention temperature while the timer function is working effectively.

Next, the case of fried food cooking while adjusting the temperature in the pan (2) to a desired temperature will be described. Turn on the power switch (not shown) and press the temperature increase button (5
6) and the temperature decrease button (57) are operated to set the fried food cooking temperature to the second UP / DOWN counter (79), the cooking temperature set to the second UP / DOWN counter (79) (130 ° C. in this embodiment). The temperature control comparator (2) can be set in the range of 210 ℃.
8) is compared with the output of the temperature sensor (15) which detects the temperature inside the pan (2). In this state, the fourth TFF (35) corresponding to the timer switch (32), ignition / extinction, and the "H" signal are applied to the eighth AND circuit (89). Therefore, if the temperature control switch (51) is turned on in this state, the corresponding 8th AN
The D circuit (89) outputs the "H" signal and the third TFF (7
The Q signal of 6) is also in the "H" state. Then, the signal is applied to the gas supply valve (23) via the 20th R circuit (91) and the 2AND circuit (67) to generate the gas supply valve (23).
Is kept open. Also, the third TFF (76)
Is applied to the ninth AND circuit (92) together with the "H" signal as the combustion request signal output from the temperature control comparator (28), and the "H" signal of the ninth AND circuit (92) is applied to the 30R circuit. A bypass valve (59) is applied via (93) to keep it open. Is applied to the first AND circuit (63), and the first AND circuit (63)
In the L state, the first gate (64) corresponding to the low temperature side memory (13) is closed, and the second gate (65) corresponding to the high temperature side memory (14) for storing the fire protection temperature is stored.
Is open. As a result, the high temperature temperature memory (14)
The fire prevention temperature (240 ° C.) stored in is compared with the output of the temperature sensor (15) (temperature inside the pan (2)), whereby the temperature inside the pan (2) falls within the range below the fire prevention temperature. It is possible to cook fried foods that are heated at.

[0036] This is applied to bring it into an open state, whereby the cooking temperature set in the second UP / DOWN counter (79) of the temperature setting device (52) is displayed on the display unit (58). After that, when the ignition / fire extinguishing switch (72) is operated, the Q output of the second TFF (74) and the upper limit temperature comparator (26) corresponding thereto output the “H” signal and further the temperature control switch ( Since the Q output of the third TFF (76) corresponding to 51) also outputs the "H" signal, the 2AND circuit (67) which receives these signals outputs the "H" signal, which causes the gas supply. The valve (23) is open. When the ignition / fire extinguishing switch (72) is operated, the ignition device (not shown) operates to start burning the gas burner (25) as in the above-described timer boiling operation.

Then, when fried food cooking starts and the temperature in the pan (2) rises to the temperature set in the second UP / DOWN counter (79) of the temperature setting device (52), these are compared for temperature control comparison. The device (28) outputs the "L" signal, and the output of the ninth AND circuit (92) also changes to the "L" state path (9
The input sides of 3) are both in the “L” state and the bypass valve (5
9) Close the valve. As a result, the amount of gas supplied to the gas burner (25) is throttled by the orifice (45) to be in a low heat state, and the temperature in the pot (2) gradually decreases. When the temperature inside the pan (2) detected by the temperature sensor (15) falls below the cooking temperature set in the second UP / DOWN counter (79) of the temperature setter (52), the temperature control comparator (28). "H" signal is output again from the bypass valve (59)
Back to the open state, which allows the gas burner (2
5) is heated again on high heat. In this way, the temperature inside the pan (2) is maintained at the set temperature of the temperature setting device (52).

In the above embodiment, the temperature control switch (5
1) is operated and the output of the first AND circuit (63) which receives the signal from the fried food under temperature control is always maintained in the "L" state, and the operation changeover switch (11) is operated during the fried food cooking. However, the output of the first AND circuit (63) does not change. That is, the sticking prevention temperature stored in the low temperature side memory (13) and the detection temperature of the temperature sensor (15) are compared with each other, and the cooking operation is not changed. The reason is that when cooking fried foods while controlling the temperature, the temperature inside the pan (2) is usually kept at 130 ° C or higher as the non-sticking temperature, so this low temperature side temperature This is because when the temperature signal of the memory (13) is compared with the temperature in the pan (2), the former is always smaller and the gas burner (25) is extinguished.

Further, in the above-mentioned embodiment, since the Q signal of the fourth TFF (35) corresponding to the timer switch (32) is in the "L" state at the time when the power is turned on, the fourth AND circuit for receiving the signal. The output of the circuit (73) is held in the "H" state, and the two inputs of the first AND circuit (63) which receives the signal of the temperature control switch (51) are in the "H" state. Therefore, the first AN
The D circuit (63) outputs the "H" or "L" signal depending only on the output of the first TFF (61) holding the operation signal of the operation changeover switch (11), whereby the operation changeover switch (11) is generated. ), The low temperature memory (1
3) or the output of the hot side temperature memory (14) is compared with the output of the temperature sensor (15) (temperature in the pan (2)). That is, similar to the conventional one, it is possible to perform a normal cooking operation in which only the charring prevention function is activated without the timer function, or a normal fried food cooking in which only the fire prevention function is activated without the temperature adjustment function.

[Brief description of drawings]

FIG. 1 is an overall front view of a stove according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional example.

[Explanation of sign]

 (2) ... Pot (11) ... Operation changeover switch (13) ... Low temperature temperature memory (15) ... Temperature sensor (25) ... Gas burner (26) ... Upper limit temperature comparison Instrument (31) ・ ・ ・ Time setting switch (32) ・ ・ ・ Timer switch

Claims (3)

[Scope of utility model registration request] 1. A temperature sensor (15) for detecting the temperature of a pan (2), a low temperature side temperature memory (13) for storing a non-sticking temperature and a high temperature side temperature memory (for storing a fire prevention temperature higher than this). 14), an operation changeover switch (11) for selecting one of the low temperature side temperature memory (13) and the high temperature side temperature memory (14), and the one temperature memory (the one selected by the operation changeover switch (11) ( 13)
The upper limit temperature comparator (26) which compares the stored temperature of (14) and the temperature detected by the temperature sensor (15) and outputs a fire extinguishing request signal of the gas burner (25) when the latter detected temperature is high.
In a gas stove equipped with, a timer switch (32) that is turned on when heating and cooking while managing time,
Time setting means (31) for setting the time of heating and cooking, a timepiece device (4) for issuing a time-up signal when the time set by the time setting means (31) has elapsed, and the time of the timepiece device (4) Up signal or upper temperature comparator (2
A determination circuit (50) for extinguishing the gas burner (25) when any of the fire extinguishing request signals of 6) is generated, and an ON signal of the timer switch (32) from the switching signal of the operation switching switch (11). Priority circuit (6
0) is provided, and the low temperature side temperature memory (13) is connected to the upper limit temperature comparator (26) by the output of the priority circuit (60). 2. The invention according to claim 1, wherein the timer operation signal holding means (34) holds the operation signal of the timer switch (32), and the holding means (34) holds the operation signal of the timer switch (32). A fire prevention signal generation circuit (6) that outputs a fire prevention signal is provided when the operation changeover switch (11) is operated while the fire prevention signal generation circuit (6) outputs the fire prevention signal. In case of fire, high temperature temperature memory (14) for storing fire protection temperature
Is a gas stove connected to the upper temperature comparator (26) side. 3. A temperature sensor (15) for detecting the temperature of the pot (2), a low temperature side temperature memory (13) for storing a nonstick property temperature and a high temperature side temperature memory (for storing a fire protection temperature higher than the temperature). 14), an operation changeover switch (11) for selecting one of the low temperature side temperature memory (13) and the high temperature side temperature memory (14), and the one temperature memory (the one selected by the operation changeover switch (11) ( 13)
The upper limit temperature comparator (26) which compares the stored temperature of (14) and the temperature detected by the temperature sensor (15) and outputs a fire extinguishing request signal of the gas burner (25) when the latter detected temperature is high.
In a gas stove equipped with, a temperature control switch (51) to be turned on when heating and cooking under temperature control, a temperature setting device (52) for setting a heating temperature, and the temperature setting device (5).
The temperature control comparator (28) which compares the temperature signal output by (2) with the signal indicating the temperature inside the pan (2) detected by the temperature sensor (15) and outputs a heating suppression signal when the latter temperature signal is large. ), And a gas amount control valve (54) for restricting the gas supply amount to the gas burner (25) by a heating suppression signal of the temperature control comparator (28), and the temperature sensor (1
When a fire extinguishing request signal is output from the upper limit temperature comparator (26) that compares the temperature inside the pan (2) detected by 5) with the fire prevention temperature stored in the high temperature side temperature memory (14), the gas supply valve (23) is closed to keep the gas burner (25) in a fire extinguishing state, and further, when the temperature control switch (51) is operated, the high temperature side temperature memory (14) is connected to the upper limit temperature comparator (26). A gas stove.