JPH0260323B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fryer for heating food products in oil.

Conventional fryers of this type allow the food to be easily placed in the oil and perform the frying operation even when the oil temperature is not well below the optimum temperature for the frying operation, thus preventing the food from becoming undesirable. The condition will be finished.

The present invention has been made in view of the above, and its feature is that if the oil temperature is not within the desired temperature range, the frying operation is prohibited by preventing food from entering the oil. That's true.

A fryer according to an embodiment of the present invention will be described below, in which microwave heating is also used in order to shorten the frying time.

That is, in general, the dielectric loss of food is sufficiently larger than that of oil, so when microwaves are supplied to a place where food and oil are present, most of the microwaves are absorbed by the food, and therefore the microwave heating described above is In a fryer that uses both, the food is heated with oil from the outside and heated with microwaves from the inside, so the frying time of the food is considerably shortened.

In Figures 1 and 2, 1 is an oil tank, 2 is a door, 3 is a heater provided at the bottom of the oil tank 1 to heat the oil 4 placed in the oil tank 1, and 5 is an oil tank with a built-in thermistor. Oil temperature detector that detects temperature, 6
is a magnetron that oscillates microwaves, 7,7,
. . . is food, 8 is a mounting body on which the food is placed, that is, a basket, 9a and 9b are a pair of rotation rods connected to each other and rotatably supported by a support shaft 10, Suspension shafts 11a and 11b of the car 8 are hung on one end of the rod. 12 is a drive motor; 13 is a drive rod 14a, 14b which is directly connected to the drive shaft of the motor and whose free end is connected to the other end of the rotating rod 9b;
are first and second regulating portions that respectively regulate the rotation of the drive rod. When the motor 12 is energized, the drive rod 13 rotates counterclockwise due to the rotational force of the motor 12 until it comes into contact with the second regulating portion 14b, and the rotation rods 9a and 9b rotate clockwise. The basket 8 rotates to the position indicated by the two-dot chain line in FIG. 2, and the basket 8 rises to the position (first position) where the food items 7, 7, . . . are exposed to the outside of the oil. On the other hand, when the motor 12 is de-energized, the rotational force of the motor 12 is lost, and the car 8 descends under its own weight. Such a descent occurs when the drive rod 13 rotates clockwise and the first regulating portion 1
4a and the rotating rods 9a, 9b stop when they reach the position indicated by the solid line. In this case, the basket 8 is at a position (second position) where the food items 7, 7, . . . enter the oil. 15 is the rotating rod 9 when the car 8 is lowered.
This is a car switch that is turned on at the other end of b.

FIG. 3 shows the circuit of the fryer, where 15' is a commercial power supply, 16 is a high voltage supply circuit that supplies high voltage to the magnetron 6, and 17, 18, 19 are first,
When the second and third relay switches are turned on, the high voltage supply circuit 16, heater 3, and motor 12 are energized. 20 is a microcomputer (hereinafter referred to as μCOM) that controls the fryer; 21, 2;
2 and 23 are the first, second, and third signals from the μCOM, respectively.
The first, which is turned on by switch signals R ₁ , R ₂ , R ₃ ,
2nd and 3rd switching circuits, 24, 25, 26
are the first, second, and third relay switches 1 when the first, second, and third switching circuits are turned on, respectively.
7, 18, and 19 are energized to turn on;
The second and third relay coils 27 are provided on the front of the fryer, and there are four date-shaped display sections 28 and an appropriate temperature display section 29 for displaying remaining frying time, oil temperature, etc.
30 is an AD (Analog-Digital) converter that converts the output signal of the oil temperature detector 5 into a digital signal, and 31 is an operating section provided on the front surface of the fryer.

FIG. 4 shows details of the operating section, 32a to 32
d are the first to fourth keys for specifying the first to fourth fly configurations, and 33a to 33d are the first to fourth keys, respectively.
1st to 4th LEDs provided corresponding to the 4th key
(light emitting diodes), 34a to 34d are similarly provided corresponding to the first to fourth keys 32a to 32d, respectively, for presetting the frying time and microwave time of the first to fourth frying modes. 1st to 4th
In each setting section, 35 is a first switch group that sets the 1 minute digit of the fly time using a 4-bit signal, and 36 is a first switch group that sets the 10 second digit of the fly time using a 4-bit signal. 2 switch groups, 37 is a third switch group that sets the 1 minute digit of the microwave time using a 4-bit signal, and 38 is a 4th switch group that sets the 10 second digit of the microwave time using a 4-bit signal. be. Each of the switch groups 35 to 38 is composed of four switch groups 39, 39, . . . and sets the above-mentioned 4-bit signal by turning on and off the switches. Therefore, by appropriately turning on and off the switches 39, 39, . is set in advance. 40 is an oil temperature setting section for setting the oil temperature in advance. The setting section consists of two switch groups 41 and 42, and the switch groups 41 and 42 are for setting the tens digit and the ones digit, respectively. In addition, each of the above switch groups 35 to 38 and 41,
42 is usually covered with a removable lid (not shown) so that a cook or the like cannot unnecessarily touch it. 43 is a start key as a means for starting frying, and 14 is a switching knob that can be switched between "off" and "frying".

Next, the operation of the fly will be explained based on the program flowchart of the μCOM 20 shown in FIG.

Normally, the knob 44 of the operating section 31 is in the "off" position, in which case the program cycles through steps S1, S2, and S2'. μCOM20 at S1 step
A signal corresponding to the switching position of the knob 44 is written into the position register PST, and in step S2, it is determined whether the knob 44 is in the "off" position based on the contents of the position register PST. In step S2', all registers and flies in μCOM 20 are cleared, and the first to third switch signals R1 to
R3 output is stopped.

Therefore, when performing a frying operation, the knob 44 is first switched to the "fly" position. Then, the program exits the cycle of steps S1, S2, and S2' and proceeds to steps S3 to S7.

In step S3, the current operating states of the first to fourth keys 32a to 32d for specifying the first to fourth fly configurations are detected, and the first to fourth setting sections 34
The fry time and microwave time preset in the setting section corresponding to the operated key among a to 34d are written to the fly register FRY and microwave register MCR of μCOM 20, respectively. on the other hand,
If neither key is operated, the fry time and microwave time set by the first setting section 34a are written into the fly register FRY and the microwave register MCR. Therefore, by setting the frequently used frying mode as the first frying mode and setting its frying time and microwave time in the first setting section 34a, it is not necessary to operate the first key 32a each time in such a frying mode. However, since the frying time and microwave time are written as described above, the operation becomes easier. In this case, since none of the first to fourth keys 32a to 32d are operated, the frying time and microwave time of the first setting section 34a are written in the frying register FRY and the microwave register MCR. It will be done. and,
The frying time and microwave time are specifically 4 minutes and 2 minutes, respectively.

In step S4, the oil temperature (123° C.) set by the oil temperature setting section 40 is written into the oil temperature register BS. In step S5, only the LED corresponding to the setting section in which the time written in step S3 is set starts to light up. in this case,
The first LED 33a starts lighting, thereby informing that the time of the first setting section 34a, that is, the time of the first fry mode is written in the fly register FRY and the microwave register MCR. In step S6, the third switch signal R3 is output, and the motor 12 is driven, so that the car 8 comes out of the oil and rises to the first position. At this time, the car switch 15 is turned off. In step S7, the oil temperature detected by the oil temperature detector 5 is written into the detection register DET and displayed on the display section 28 of the display 27.

The program then advances to step S8. In this step, the detected oil temperature in the detection register DET changes from "Oil temperature set in oil temperature register BS 123°C - Predetermined temperature 7°C" to "Oil temperature set in oil temperature register BS 123°C".
It is determined whether or not the temperature is within a desired temperature range up to 7° C.+predetermined temperature. In this case, assuming that the detected oil temperature is sufficiently low, the program reaches step S9 and the appropriate temperature flag GD is cleared. In the following step S10, it is determined whether the detected temperature is equal to or higher than the set oil temperature, but in this case, of course, it is lower than the set oil temperature, so the program proceeds to step S11. In this step, a second switch signal R2 is output,
Therefore, the heater 3 starts heating the oil. next
In step S12, it is determined whether or not the appropriate temperature flag GD is 1, but in this case it is O, so the program returns to step S1 and cycles through steps S1 to S12 (hereinafter, this cycle will be referred to as the first loop). ).

As a result, the oil heats up and the detected oil temperature reaches 123℃.
-7℃" to 123℃+7℃",
The program exits the first loop at step S8 and proceeds to steps S13 and S14. In step S13, the appropriate temperature flag GD is set to 1, and in step S14, the appropriate temperature display section 29 on the display 27 starts to light up. However, if the detected oil temperature is still lower than the set oil temperature, the program continues from S10 to
The process goes through the S11 step and then reaches the S12 step. Here,
Since the appropriate temperature flag GD is set to 1, the program then proceeds to step S15. In this step, it is determined whether or not the start key 43 is currently being operated, but since it is not currently being operated, the program then returns to step S1, and steps S1 to S8.
Steps S13, S14, S10 to S12, and S15 are cycled (hereinafter, such cycle will be referred to as the second loop).

When the detected oil temperature becomes equal to or higher than the set oil temperature, the program exits the second loop at step S10 and proceeds to step S16. In this step, the output of the second switch signal R2 is stopped, and therefore heating of the oil by the heater 3 is stopped. and,
The program goes through steps S12 and S15, returns to step S1, and then steps S1 to S8, S13 to S14, S10, S16, S12,
Cycle through step S15 (hereinafter, repeat this cycle in the third step)
(referred to as a loop).

Then, depending on whether the detected oil temperature is equal to or higher than the set oil temperature, the program enters the third loop or the second loop. Of course, during this time, the detected oil temperature is within the desired temperature range of "123°C - 7°C" to "123°C + 7°C".

The cook confirms this state by lighting the appropriate temperature display section 29. If the cook wishes to perform the frying operation in the first frying mode, the cook only needs to operate the start key 43. Note that, for example, if it is desired to perform a fly operation in the third fly mode, the third key 32c may be operated before operating the start key 43.

Therefore, when the start key 43 is operated to execute the fly operation in the first fly mode, the program exits the second or third loop at step S15 and reaches steps S17 and S18. In step S17, the microwave flag M is set to 1, and in step S18, the output of the third switch signal R3 is stopped and the car 8 begins to descend under its own weight. The program continues until the basket 8 has descended to the second position and the basket switch 15 is turned on.
The process remains at step S19 until the items 7, . In this step, the fly time is started to decrease by 4 minutes and the microwave time is decreased by 1/2 second in the fly register FRY and the microwave register MCR.

In the following step S21, the microwave flag M becomes 1.
In this case, it is 1, so the next step is S22. In this step, the first switch signal R1 is output to start microwave heating. Next, in step S23, the detected oil temperature is written into the detection register DET, and the remaining frying time is displayed on the display section 28. Next S24
The route from step S25 to step S25 or from step S24 to step S26 is the same as the route from step S10 to step S11 or from step S10 to step S16.

Next, in step S27, it is determined whether or not the remaining fly time is 0 in the fly register FRY, but since it is not 0 now, the program advances to step S28. In this step, the microwave resistor
The MCR determines whether the remaining microwave time is 0 or not, but since this time is not 0 at the moment, the program returns to step S21 and repeats steps S21 to S24, S25 (or S26), S27, and S28. (hereinafter, such circulation will be referred to as the fourth loop).

When the remaining microwave time becomes 0, the program exits the fourth loop at step S28 and proceeds to step S29. In this step, the microwave flag M is cleared and time reduction in the microwave register MCR is stopped. The program then returns to step S21, but since the microwave flag M is 0 in this case, the program then proceeds to step S30. In this step, the output of the first switch signal R1 is stopped, and therefore the microwave heating is stopped. The program then runs S23, S24, S25 (or
S26), S27 to S29 steps, return to S21 step, and then S21, S30, S23, S24, S25 (or
S26), steps S27 to S29 are cycled (hereinafter, such cycle will be referred to as the fifth loop).

Then, when the remaining fly time becomes 0, the program exits the above fifth loop at step S27.
Proceed to step S31. In this step, the time reduction in the fry register FRY is stopped, the third switch signal R3 is outputted, the basket 8 is raised to the first position, and the food items 7, 7 are lifted out of the oil.
Therefore, the frying operation in the first frying mode is completed. Furthermore, in step S31, the first switch signal
If R1 is being output, the output of this signal is stopped, and a buzzer (not shown) sounds,
Such termination is notified. In response to this notification, the cook opens the door 2 and takes out the food items 7, 7, . . . .

Thereafter, the program returns to step S1 and enters the second or third loop. Then, when the knob 44 is switched to the "off" position, steps S1, S2, and S2' are cycled through.

As you can see from the above explanation, the detected oil temperature is “123℃−
If the temperature is not within the desired temperature range from ``7℃'' to ``123℃+7℃,'' the program enters the first loop and immediately returns from step S12 to step S1.
Since step S15 is not passed, even if the start key 43 is operated, such operation will not be detected and will be invalidated.Therefore, the car 8 will remain out of the oil due to the driving force of the motor 12, and the operation as described above will occur. The frying operation due to the food items 7, 7, . . . entering the oil is not performed, that is, the frying operation is prohibited.

As is clear from the above description, according to the present invention, there is provided an oil tank, a food to be placed in the oil in the oil tank, a mounting body on which the food is placed, and a first stage through which the food comes out of the oil. a lifting means for raising the above-mentioned body to a second position and lowering the above-mentioned placing body to a second position where the food is immersed in oil, a heater for heating the oil, an oil temperature detector for detecting the oil temperature, a frying start means, and the above-mentioned oil temperature detector. The elevating means controls the driving of the heater so that the oil temperature detected by the oil temperature falls within a desired temperature range, and lowers the mounting body to the second position in conjunction with the operation of the frying start means. , and then when the frying ends, the above-mentioned mounting body is set to the above-mentioned first
a control unit for controlling the lifting means to raise the temperature to the desired temperature range, and the control unit operates the frying start means when the oil temperature detected by the oil temperature detector is not within the desired temperature range. Since there is an invalidation processing step for invalidating the oil, it is possible to prevent the food from entering the oil at an undesired temperature, thereby significantly preventing the food from being finished in an undesirable state.

[Brief explanation of drawings]

The drawings show a flyer according to an embodiment of the present invention, FIG. 1 is a front sectional view, FIG. 2 is a side sectional view, and FIG. 3 is a circuit diagram.
FIG. 4 is a front view of the main part, and FIG. 5 is a program flowchart of the microcomputer. 1... Oil tank, 3... Heater, 5... Oil temperature detector, 7, 7,... Food, 8... Basket, 12... Drive motor, 20... Microcomputer.

Claims (1)

[Claims] 1. An oil tank, food to be placed in oil in the oil tank, a mounting body on which the food is placed, raising the mounting body to a first position where the food is out of the oil, and raising the mounting body so that the food is not in the oil. A lifting means for lowering the oil to the second position, a heater for heating the oil, an oil temperature detector for detecting the oil temperature, a frying start means, and an oil temperature detected by the oil temperature detector that is within a desired temperature range. At the same time, when the frying start means is operated, the lifting means is controlled to lower the placing body to the second position, and then when the frying ends, the placing body is lowered. The first above
a control unit for controlling the lifting means to raise the temperature to the desired temperature range, and the control unit operates the frying start means when the oil temperature detected by the oil temperature detector is not within the desired temperature range. A flyer characterized by having an invalidation processing step for invalidation processing.