JPH09285397A - Automatic cooker for fried food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase safety by providing a heater temperature (temp.) sensor other than a first and second temp. sensors, using the detection signal of their upper and lower limit temp. for the temp. control, and thereby preventing an excessive rise in oil temp. or a heater temp., oil inflammation due to lowering of an oil level, and occurrence of a fire. SOLUTION: The automatic cooker for fried food is provided with a tank 9 in which oil is stored, a heater 14, a sensor 13a, a 13b for detecting oil temp., and a controller 16A for controlling energization of the heater 14. The cooker is further, provided with a heater temp. sensor 13c other than the oil temp. sensor 13a, 13b, for which a lower limit temp. is set lower than the ON-temp. of the heater 14 and for which a higher limit temp. is set higher than the OFF- temp. of the heater 14, while the heater sensor 13c is provided with a higher limit temp. of the heater that is higher than the above higher limit of the oil sensor. The heater 14 is controlled based on the upper and lower limit temp. detection signals that are outputted if the detection temp. of each sensor 13a-13c is in excess of the corresponding upper or lower limit temp. Various abnormal detection signals are also obtained concerning the oil, on the basis of the upper and lower limit temp. detection signals and the heater energization signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cooking machine for frying foodstuffs in heated oil to produce frying products. More specifically, it mixes powder and other ingredients with a liquid and forms them into a certain shape with a piston. By extruding and frying in oil,
The present invention relates to a frying product automatic cooking machine that automatically manufactures frying products.

[0002]

2. Description of the Related Art FIG. 4 shows a prior art of an automatic frying product cooking machine for producing french fries and the like. Hereinafter, the manufacturing and selling operation of the fried food according to this conventional technique will be described together with the configuration. In the figure, 1 is a raw material box, and the powder 3 and water 5 sent from the raw material box 1 by a spiral 2 are agitated by a stirring rod 7 in a cylinder 6. The water 5 is warmed to a constant temperature by the water tank 4.

The agitated food in the cylinder 6 is pushed out by the piston 8 into the oil tank 9 through the opening of the punch plate 18, and is fried by the oil 17 therein for a certain period of time. The fried food is a rotatable fly mesh 1
Pusher 1 scooped by 0 and moving horizontally
1 pushes it into the front cup 12.

A temperature detecting sensor 13 and a heater 14 are arranged in the oil tank 9. The detection signal of the temperature detecting sensor 13 is read into the temperature controller 15 and the signal is read by the control unit 1.
6, the oil temperature is controlled within a predetermined range, and the oil temperature is controlled by sending to the heater 14 an energization signal that combines various conditions such as "do not energize when abnormal". In addition, 19 is a cutter plate for cutting the food material extruded below the punch plate 18 into a certain length, and the cutter plate 19 is movable in the horizontal direction.

FIG. 5 shows a detailed structure of the inside of the oil tank 9. Conventionally, as the temperature detection sensor 13, an upper temperature detection sensor 13a arranged at an upper part of the oil tank 9 and a lower temperature detection sensor 13b arranged at a lower part thereof.
And two are attached. Upper temperature detection sensor 1
3a is at the upper limit position of the specified amount of oil 17, and the lower temperature detection sensor 13b is arranged slightly above the heater 14 so as not to be directly affected by the heat generated by the heater 14.

FIG. 6 shows the configuration of an oil temperature control system in the prior art. In this figure, 15a is an upper temperature controller connected to the upper temperature detection sensor 13a,
5b is a lower temperature controller connected to the lower temperature detection sensor 13b, 20 is a heater energizing relay connected to the controller 16 and the heater 14, a1 is an upper upper limit temperature detection signal, and b1
Is an upper lower limit temperature detection signal, a2 is a lower upper limit temperature detection signal, b2 is a lower lower limit temperature detection signal, c is a control signal, d is a heater energization signal, e is an oil temperature excessive rise detection signal, and f is an oil temperature decrease detection signal. , G are oil level drop detection signals, and h is a heater abnormality detection signal.

FIG. 7 shows an oil temperature control method, an oil temperature drop detection control method, and an oil temperature excessive rise detection control method by the above oil temperature control system, FIG. 8 shows an oil level drop detection control method, and a heater abnormality detection control method. Each is shown in FIG.

In FIG. 6, temperature detecting sensors 13a, 1
The signal of 3b is read by the respective temperature controllers 15a and 15b. In the lower temperature controller 15b, the lower limit temperature Tb is set to a temperature lower than the ON point Ton of the heater 14 and the upper limit temperature Ta is set to a temperature higher than the OFF point Toff of the heater 14, as shown in FIG. When the temperature detected by the temperature detection sensor 13b exceeds the temperatures Ta and Tb, the lower upper limit temperature detection signal a2 and the lower lower limit temperature detection signal b are detected.
2 is output respectively. Also, the lower temperature controller 15b
Outputs a control signal c to energize the heater 14 between the ON point Ton and the OFF point Toff.

An upper limit temperature and a lower limit temperature of the oil 17 are set in the upper temperature controller 15a, and when the respective temperatures are exceeded, an upper upper limit temperature detection signal a1 and an upper lower limit temperature detection signal b1 are output. The control unit 16 controls the signals a1 and b
The heater energization signal d and various signals e, f, g and h for abnormality detection are output by taking in 1, a2, b2 and c and combining them.

Now, the upper and lower temperature detection sensors 13a, 13
When the upper limit temperature detection signal a1 or a2 is output from either b, the oil temperature excess temperature detection signal e is output as shown in FIG. 7, and when the lower limit temperature detection signal b1 or b2 is output, the oil temperature The drop detection signal f is output. Further, as shown in FIG. 8, when the upper lower limit temperature detection signal b1 of the upper temperature detection sensor 13a is output at the fall of the heater energization signal d, the oil level decrease detection signal g is output, and
As shown in FIG. 9, when the energization signal d of the heater 14 is continuously ON, the upper and lower temperature detection sensors 13
If the lower limit temperature detection signals b1 and b2 of a and 13b remain output for a certain period of time T, the heater abnormality detection signal h is output because the heater 14 may not generate heat.

Here, in FIGS. 8 and 9, the temperature detected by the lower temperature detection sensor 13b exceeds the temperature detected by the upper temperature detection sensor 13a. Because it is in a close position.
When the oil temperature overheat detection signal e in FIG. 7, the oil level drop detection signal g in FIG. 8 and the heater abnormality detection signal h in FIG. 9 are generated, it is dangerous to continue energizing,
It is decided to immediately stop the energization of the heater 14.

[0012]

In the above prior art, when the amount of oil is smaller than the position of the lower temperature detecting sensor 13b, the temperature of the lower temperature detecting sensor 13b is almost permanent even if the heater 14 is energized. Since it does not rise to the OFF point Toff, the heater 14 is continuously energized. At this time, since the upper lower limit temperature signal b1 is generally ON, when the lower lower limit temperature signal b2 is ON, as shown in FIG.
When a certain time T elapses as shown in FIG. 5, the heater abnormality detection signal h is output and the power supply to the heater 14 is stopped.

However, depending on the length of time until it is determined that the heater is abnormal, the oil 17 may become extremely hot and may ignite. Further, when the amount of oil is smaller than the position of the heater 14, the so-called “cooking state” occurs, and the heater 14 itself becomes considerably hot, and the oil 17 may ignite, which is extremely dangerous. Further, the heater abnormality (heater abnormality detection signal h) is based on the idea that the heater 14 itself does not generate heat and the oil temperature does not rise, and as described above, the heater 14 has no abnormality,
In a system that detects a heater abnormality even when the amount of oil is simply low, there is a problem that the true cause of the abnormality cannot be known.

Therefore, the present invention is intended to provide an automatic frying commodity cooker capable of eliminating the danger of fire and accurately determining the cause of the abnormality.

[0015]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to an oil tank containing oil for heating, a heater for heating the oil, and a temperature for detecting the temperature of the oil. A detection sensor and a control unit that controls energization to the heater based on the temperature detected by the temperature detection sensor,
In a frying commodity automatic cooking machine that heats foodstuffs with oil to manufacture, as the temperature detection sensor, a first temperature detection sensor arranged above the oil in the oil tank and a second temperature detection sensor arranged below the oil in the oil tank. A temperature detection sensor, and a heater temperature detection sensor for detecting the temperature of the heater. The first and second temperature detection sensors turn off the lower limit temperature lower than the temperature at which the heater is turned on and the heater are turned off. An upper limit temperature higher than the temperature is set, and a heater upper limit temperature higher than the upper limit temperature is set for the heater temperature detection sensor, and the detected temperature of each temperature detection sensor exceeds the corresponding upper and lower limit temperature. The energization to the heater is controlled based on the upper limit temperature detection signal and the lower limit temperature detection signal output at this time. As a result, in addition to the oil temperature control by the first and second temperature detection sensors, the energization of the heater can be controlled based on the temperature detected by the heater itself by the heater temperature detection sensor.

According to a second aspect of the present invention, in the fried commodity automatic cooking machine according to the first aspect, the second temperature detection sensor is located below the heater temperature detection sensor so as not to be affected by heat generated by the heater. It is arranged at a position apart from the heater. As a result, the first temperature detecting sensor, the heater temperature detecting sensor, the second
Since the temperature detection sensors are arranged in this order, temperature control, energization stop, etc. can be performed according to the position of the oil surface.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the fried commodity automatic cooking machine described above, an abnormality detection signal relating to oil is obtained based on the upper limit temperature detection signal, the lower limit temperature detection signal and the energization signal to the heater.
That is, various abnormality detection signals can be obtained by combining the upper and lower limit temperature detection signals corresponding to the position of each temperature detection sensor and the energization signal to the heater.

As the abnormality detection signal, as described in claim 4, an oil temperature decrease detection signal based on the lower limit temperature detection signal, an oil temperature excess temperature detection signal based on the upper limit temperature detection signal, a lower limit temperature detection signal and heater energization. An oil level drop detection signal and a heater abnormality detection signal based on the signal are included, and an accident such as a fire can be prevented from occurring based on these abnormality detection signals. At the same time, it is possible to accurately determine the oil level drop detection signal and the heater abnormality detection signal.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of the oil temperature control system in this embodiment, and the same components as those in FIG. 6 are designated by the same reference numerals. In the present embodiment, in addition to the upper temperature detection sensor 13a as the first temperature detection sensor and the lower temperature detection sensor 13b as the second temperature detection sensor, the heater 14 is attached to the upper end portion thereof in order to directly detect the temperature. The heater temperature detection sensor 13c is provided. Here, the lower temperature detection sensor 13b is located below the heater temperature detection sensor 13c, and the heater 1
It is attached at a position slightly apart from the heater 14 so as not to be directly affected by the heat generation of No. 4.

A temperature controller 15c is connected to the heater temperature detection sensor 13c, and a heater upper limit temperature detection signal a3 and a heater lower limit temperature detection signal b3 output from the controller 15c are input to the controller 16A. Here, the upper limit temperature and the lower limit temperature of the heater are set in the temperature controller 15c, and when the temperature detected by the heater temperature detection sensor 13c exceeds these, the heater upper limit temperature detection signal a3,
The heater lower limit temperature detection signal b3 is output. Note that FIG. 2 shows the temperature detection sensors 13a and 13
It shows the mounting positions of b and 13c.

FIG. 3 is for explaining the oil level drop detection control method and the heater abnormality detection control method in this embodiment, and the operation will be described below with reference to FIG. Now, when the upper limit temperature detection signal a1, a2 or a3 of any one of the upper and lower temperature detection sensors 13a and 13b or the heater temperature detection sensor 13c is output, although not shown in the drawing, the oil temperature excessive temperature detection is detected. Signal e
When the lower limit temperature detection signal b1, b2 or b3 is output, the oil temperature decrease detection signal f is output.

Further, when the heater energization signal d in FIG. 3 falls and the lower limit temperature detection signal b1 of the upper temperature detection sensor 13a is output, and when the heater 14 is continuously energized, the upper and lower temperature detection is performed. The lower limit temperature detection signals b1 and b2 of the sensors 13a and 13b are still output for a certain period of time T1, and the heater temperature detection sensor 1
When the lower limit temperature detection signal b3 of 3c is not output, the oil level decrease detection signal g is output. In FIG. 3, the oil level drop detection signal g is output at time ta under the latter condition. In this case, since the lower limit temperature detection signal b3 of the heater temperature detection sensor 13c is not output, it can be known that the heater 14 is energized, and it can be estimated that there is no heater abnormality.

Further, the energization signal d of the heater 14 is continuously ON, and the lower limit temperature detection signal b of the upper and lower temperature detection sensors 13a and 13b and the heater temperature detection sensor 13c.
If 1, b2 and b3 are still output for the fixed time T2 in FIG. 3, the heater abnormality detection signal h is output.
In FIG. 3, the heater abnormality detection signal h is output at time tb. In this case, since the lower limit temperature detection signal b3 of the heater temperature detection sensor 13c is ON for a certain period of time even though the energization signal d is continuously ON, the oil level decrease described above in detecting the heater abnormality. It can be distinguished from the time of detection. As in the prior art, when the oil temperature overheat detection signal e, the oil level drop detection signal g, and the heater abnormality detection signal h are generated, the power supply to the heater 14 is immediately stopped.

As described above, in this embodiment, the oil 17
An upper temperature detection sensor 13a for detecting the temperature of the upper part of
A lower temperature detection sensor 13b for detecting the temperature of the oil 17 is attached at a position below the heater 14 and is not directly affected by the heat generated by the heater 14, and the heater temperature detection sensor 13c is attached to the upper end of the heater 14. It is attached in contact with the part. And each temperature controller 15a, 1
Upper limit temperature detection signals a1, a output from 5b, 15c
2, a3, lower limit temperature detection signals b1, b2, b3 and heater energization signal d are combined to detect various abnormality detection signals related to temperature control (oil temperature excessive rise detection signal e, oil temperature decrease detection signal f, oil level decrease detection signal). g, heater abnormality detection signal h)
Is obtained.

Therefore, for example, when there is an oil amount such that the heater 14 is submerged in the oil tank 9, the ON / OFF control of the heater 14 is normally performed by the lower temperature detection sensor 13b. The temperature of the heater 14 does not rise abnormally. In addition, the oil level is below the heater temperature detection sensor 13c and the lower temperature detection sensor 13c
If it is above b, the same as above, or the upper limit temperature detection signal a3 of the heater temperature detection sensor 13c is output, and the energization of the heater 14 is stopped. Further, when the oil level is below the lower temperature detection sensor 13b, the upper limit temperature detection signal a of the heater temperature detection sensor 13c is detected.
3 is output and the power supply to the heater 14 is stopped.

Therefore, in any case, an appropriate temperature control of the oil temperature can be realized, and there is no fear of a fire due to the ignition of oil. In addition, in the above embodiment, the case where the present invention is applied to an automatic cooking machine for french fries has been described, but the present invention is also applicable to an automatic cooking machine for other types of fried products that does not have a stirring / molding process or the like. Is.

[0027]

As described above, according to the present invention, a heater temperature detection sensor is provided in addition to the first and second temperature detection sensors, and the upper and lower limit temperature detection signals are used for temperature control, so that the oil temperature can be controlled. It is possible to realize a highly safe frying product automatic cooking machine by preventing the ignition of oil and the occurrence of fire due to the excessive rise of the heater temperature, the decrease of the oil level, and the like. Further, it is possible to clearly discriminate the decrease in the oil level and the heater abnormality, and it is possible to promptly deal with the cause of the abnormality.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an oil temperature control system according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of the inside of the oil tank according to the embodiment of the present invention.

FIG. 3 is a diagram showing a time chart of an oil level decrease detection control method and a heater abnormality detection control method according to the embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a conventional technique.

FIG. 5 is a detailed configuration diagram of the inside of an oil tank according to the related art.

FIG. 6 is a configuration diagram of a conventional oil temperature control system.

FIG. 7 is a diagram showing a time chart of an oil temperature control method, an oil temperature decrease detection control method, and an oil temperature excessive rise detection control method of the related art.

FIG. 8 is a diagram showing a time chart of a conventional oil level drop detection control method.

FIG. 9 is a diagram showing a time chart of a heater abnormality detection control method of a conventional technique.

[Explanation of symbols]

 1 Raw material box 2 Spiral 3 Powder 4 Water tank 5 Water 6 Cylinder 7 Stirring rod 8 Piston 9 Oil tank 10 Fly mesh 11 Pusher 12 Cups 13a, 13b, 13c Temperature detection sensor 14 Heater 15a, 15b, 15c Temperature controller 16A Control part 17 Oil 18 Punch plate 19 Cutter plate

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takeshi Kasai 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd.

Claims (4)

[Claims] 1. An oil tank containing oil for heating, a heater for heating the oil, a temperature detection sensor for detecting the temperature of the oil, and energization of the heater based on the temperature detected by the temperature detection sensor. In a frying product automatic cooking machine, which is provided with a control unit for controlling and heats foodstuffs with oil, the first temperature detection sensor arranged above the oil in the oil tank and the oil A second temperature detection sensor arranged at a lower portion, and a heater temperature detection sensor for detecting the temperature of the heater, and a temperature higher than the temperature at which the heater is turned on for each of the first and second temperature detection sensors. A lower lower limit temperature and an upper limit temperature higher than the temperature at which the heater is turned off are set, and a heater upper limit temperature higher than the upper limit temperature is set for the heater temperature detection sensor. An automatic frying product cooking machine, wherein energization to a heater is controlled based on an upper limit temperature detection signal and a lower limit temperature detection signal which are output when a detected temperature of a sensor exceeds a corresponding upper and lower limit temperature. 2. The automatic frying product automatic cooking machine according to claim 1, wherein the second temperature detecting sensor is arranged below the heater temperature detecting sensor and apart from the heater. Cooking machine. 3. The automatic frying product cooking machine according to claim 1, wherein an abnormality detection signal related to oil is obtained based on the upper limit temperature detection signal, the lower limit temperature detection signal, and an energization signal to the heater. Automatic cooking machine for fried products. 4. The fried food automatic cooking machine according to claim 3, wherein the abnormality detection signal includes an oil temperature decrease detection signal, an oil temperature excessive increase detection signal, an oil level decrease detection signal, and a heater abnormality detection signal. A unique automatic fry product cooker.