JPH0356043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an oil temperature adjusting device in a deep-fried food cooker for cooking fried foods such as french fries.

(Prior art and its problems) Conventionally, in a deep-fried food cooker used for commercial purposes in fast food restaurants and the like for frying french fries, chicken nuggets, etc., a lower part of the oil tank is used to store oil for frying french fries, etc. A heating means such as a burner or a heater is installed to heat the oil in the oil tank, and this heating means is connected to a thermostat that detects the temperature of the oil by immersing a sensing part in the oil in the oil tank. , the thermostat is set at a constant temperature in order to maintain the oil at an appropriate temperature for frying the food to be cooked, such as french fries, and when the temperature of the oil drops below the set temperature, the heating The heating means is set to turn on to heat the oil in the oil tank, and when the temperature rises to a certain level, the heating means is turned off. For example, a circuit as shown in Fig. 3 is installed as such an oil temperature regulating device.
Thermostat contact THb1 is connected,
When the power switch SW is turned on, the temperature sensing part SR of the thermostat TH, which is immersed in the oil in the oil tank, senses the temperature of the oil, and if the temperature falls below the set temperature, the thermostat contact THb1 is turned on. It is configured to heat the heater R by causing the heater R to heat up. Furthermore, when the oil temperature reaches the set temperature, the thermostat contact THb1 is turned off, heating is stopped, and the oil temperature is maintained within a certain temperature range.

The temperature distribution of oil temperature during frying operations in a frying food cooker equipped with such an oil temperature adjustment device is shown in Figures 4A and 4B. When adding food to be cooked, for example, if the food to be cooked is potato chips, the optimum temperature for frying the potato chips is approximately 180°C.
The thermostat TH is set to the set temperature of ℃, and the oil temperature is maintained at approximately 180℃. In this state, when about 500 g of potato chips, which had been cut into strips and frozen at -15°C or lower, were placed in a basket and placed in the oil tank, the temperature of the oil in the oil tank dropped rapidly as the potato chips were added. The thermostat HT operates at the middle point A (approximately 160°C to 170°C), the thermostat contact THb1 is turned on, and the heater R is heated. The oil temperature gradually rises as a result of heating by heater R and reaches point D, but the staff at the fast food restaurant who cooks potato chips is instructed in advance about the optimal cooking time for potato chips, and the optimal cooking time is, for example, 2 minutes 30 minutes. It is set to seconds,
The clerk turns on a separately installed timer when inserting potato chips, and after 2 minutes and 30 seconds the timer is set and a buzzer sounds to instruct potato chips to be removed. The clerk takes out potato chips from the tank. At take-out point D, where this buzzer sounds, the heater is still heating, and after the potato chips are taken out from the tank, the oil temperature rises above the set temperature of 180°C, and the thermostat TH senses this and starts the thermostat. This turns off contact THb1.

On the other hand, as shown in Figure 4 B, when potato chips are added twice in a row, the temperature curve is similar to that in Figure 4 A at the first time shown in B, but when the potato chips are added the second time, Sometimes, the oil temperature is high because the heater is in the heating state, and since the heater is continuously heating, the oil temperature does not drop that much, and as shown in C, the potato chips are cooked at a higher temperature than the first time. is fried.

In this way, when cooking while waiting for a customer and when cooking twice in a row, even if the same amount of potato chips is cooked in the same cooking time, the degree of frying will vary due to the difference in oil temperature. As a result, there was a problem that the quality of the potato chips after cooking was not uniform. In other words, when frying food, during cooking, especially when the oil temperature is low at the beginning, the oil penetrates into the food, and the oil is cooled by the food, causing the food to become soaked in oil. There was a problem that the quality of the finished product deteriorated.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and it is an object of the present invention to provide an oil temperature regulating device for a frying food cooker that does not cause variations in the quality of fried food products. Its purpose and gist is that it is equipped with an oil tank containing oil for frying food, a heating means for heating the oil in the oil tank, and a thermostat that controls the heating means to maintain the oil at an appropriate temperature. In the deep-fried food cooker, a timer is provided to turn on the heating means when the food to be cooked is put into the oil tank, and the setting time of the timer is set such that the temperature of the thermostat is adjusted according to the drop in oil temperature caused by the food to be cooked. The reason is that the time is set to be slightly longer than the time it takes to activate and turn on the heating means.

(Function) When the food to be cooked is put into the oil in the oil tank set at an appropriate temperature, the installed timer is activated and the heating means is turned on. starts heating the oil,
The drop in oil temperature due to the addition of food to be cooked is reduced,
The oil temperature at the early stage of frying can be maintained at a higher temperature than before. Furthermore, the timer that turns on this heating means is set to a slightly longer time than the time required for the thermostat to activate and turn on the heating means due to a drop in oil temperature, so the thermostat senses the drop in oil temperature. The oil temperature can be effectively raised through the heating means before the thermostat is activated, that is, from when the food to be cooked is put in until the thermostat is activated, and the rise in oil temperature can be measured at an early stage. It is something.

The timer setting time is set in relation to the thermostat operating time.
The set time of the timer is determined based on empirical measurements, depending on the temperature of the food to be cooked when it is put into the oil tank.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 shows the oil temperature adjustment device for a deep-fried food cooker.
is the fuse, SW is the power switch to supply electricity to the equipment, PLW is the power switch SW is ON
R is a heater installed at the bottom of the oil tank containing frying oil, and TH is a thermostat that maintains the oil in the oil tank at an appropriate temperature. The thermistor resistor SR, which is the temperature-sensing part of this thermostat TH, is immersed in oil in an oil tank. The thermostat TH has a structure that expands and presses the diaphragm. The thermostat TH and the heater R are connected through a thermostat contact THb1, and when the thermostat TH is operated, the thermostat contact THb1 is turned on and the heater R is energized.

In the figure, reference numeral S and SW is a start switch, which is composed of a button switch, etc., and two timers T ₁ and T ₂ are connected in parallel to the start switch S and SW. One timer _T1 is a timer for the buzzer, and in this example, it is set to 2 minutes and 30 seconds, which is the cooking time for potato chips, and when the start switch S/SW is turned on, the timer _T1 for the buzzer is activated. Start operation, 2 minutes
The structure is such that the buzzer timer contact T ₁ a connected to the buzzer timer T ₁ is turned on after 30 seconds. Timer contact T ₁ a for this buzzer is ON
When the buzzer BZ connected to this
This sounds to notify the store clerk of the pick-up time.

Further, one timer _T2 is a timer for the heater, and is a timer contact for the heater connected in parallel with the thermostat contact THb1.
Connected to T ₂ a, start switch S/SW
When the heater timer T ₂ is turned ON, the heater timer T ₂ is activated, and the heater timer contact T ₂ a is turned ON at the same time as the heater timer T 2 is activated.

In other words, the start switch S/SW is pressed and turned on by the staff at the same time that the staff who wants to cook potato chips puts a predetermined amount of potato chips in a basket and puts them into the oil tank of the cooker. When SW is pressed, the timers T ₁ and T ₂ start operating at the same time. still,
In this example, the operating time of the heater timer _T2 is set to about 35 seconds. That is, when the start switch S/SW is pressed by the clerk, the heater timer _T2 starts operating.
The heater timer contact T ₂ a is turned on and the heater R is energized and heated. Therefore, the heater R is heated for 35 seconds by the heater timer _T2 at the same time as the potato chips are added. This 35
The time in seconds is the thermostat contact
THb1 is activated by thermostat TH and turns ON.
This is a slightly longer time than the actual time. In other words, the thermostat TH starts operating due to the sudden drop in oil temperature when potato chips are added.
Since it takes about 30 seconds for this detection, the thermostat contact THb1 is turned on about 30 seconds after the potato chips are inserted to heat the heater.

Note that HL in the figure is a high limit heater, which is constructed of a bimetal or the like installed on the wall of the oil tank, and automatically turns off the heater R when the oil temperature rises more than necessary.

In a deep-fried food cooker equipped with such an oil temperature adjusting device as shown in FIG. 1, the temperature curves are as shown in FIG. 2 (a) and (b). In other words, when cooking from the customer's waiting state as shown in Figure 2 A, the oil temperature is maintained at the set temperature of approximately 180°C via the thermostat TH until the potato chips are added, and at the same time as the potato chips are added, the staff When the start switch S/SW is pressed and turned ON, the heater timer contact is activated via the heater timer _T2 .
T ₂ a is turned on and heating of heater R is started.
Assuming that point H is the time when potato chips are put in, the oil temperature in the oil tank drops rapidly from point H as potato chips, which are frozen foods, are put in, and when it reaches point I, thermostat TH is activated and thermostat contact THb is turned on.
Turn on 1. As a result, the heater R is energized, but since the heater timer contact T ₂ a is already in the ON state, the heater R is already energized and continues heating. After that, when the point J is reached, the heater timer _T2 is activated and the heater timer contact _T2a is turned off. Even in this state, the heater R continues heating because the thermostat contact THb1 is turned on. On the other hand, the buzzer timer _T1 has started operating due to the start switch S/SW being pressed by the clerk.
When 2 minutes and 30 seconds, which is the proper cooking time for potato chips, has elapsed, the buzzer timer contact T ₁ a is turned on and the buzzer BZ issues a removal alarm. As a result, the potato chips are taken out from the oil tank by the clerk at point K. After the oil is taken out, the oil temperature rises, and at point L, the thermostat contact THb1 is turned off via the thermostat TH, and the heater R stops heating. On the other hand, FIG. 2B shows a case where cooking is performed twice consecutively. In Fig. 2B, when the potato chips are added for the first time, the temperature curve becomes similar to that shown in Fig. 2A, and when the potato chips are added for the second time, the thermostat contact THb1 is is turned off and heating of the heater is stopped, the oil temperature is maintained at a fairly high temperature. From this state, even if potato chips are added, the oil temperature does not drop that much, and furthermore, from point U to W. When the temperature reaches the point, the heater timer contact T ₂ a is turned ON, so the heater R is heated again, and the heater timer contact T ₂ a is turned on again.
Since the thermostat contact THb1 is turned on at point V before the heater R is turned off, the heating state of the heater R continues and the oil temperature is increased. In the frying machine equipped with the oil temperature control device of this example, the amount of heating for potato chips shown in Fig. 2 becomes almost constant, variations in frying of potato chips are reduced under all conditions, and potato chips of almost constant quality can be fried even when operated by a store clerk with little experience.

In this example, heater R is used as the heating means.
However, similar oil temperature adjustment can be performed in a frying device having a gas heating device using a burner instead of the heater R.

(Effects of the Invention) The present invention includes an oil tank containing oil for frying food, a heating means for heating the oil in the oil tank, and a thermostat that controls the heating means to maintain the oil at an appropriate temperature. In the deep-fried food cooker, a timer is provided to turn on the heating means when the food to be cooked is put into the oil tank, and the timer is set to:
By setting the time to be slightly longer than the time when the thermostat is activated and the heating means is turned on due to the drop in oil temperature due to the dropping of the food to be cooked, the oil is turned on by the heating means at the same time as the food to be cooked is put into the oil tank. Because it is heated, the temperature of the oil is prevented from dropping when the food is put in, and the food can be fried under appropriate temperature conditions, resulting in uniform quality of the product with no variation in frying quality, etc. This has the effect that it is possible to achieve the following.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an oil temperature adjustment device showing an embodiment of the present invention, and FIGS. Temperature distribution diagrams, Figures 3 and 4 show conventional examples, Figure 3 is a circuit diagram of a conventional oil temperature adjustment device, and Figure 4 shows a conventional example.
Figures A and B are oil temperature transition distribution diagrams in a conventional oil temperature adjustment device. TH...Thermostat, R...Heater,
THb1...Thermostat contact, T ₁ ...Buzzer timer, T ₁ a...Buzzer timer contact, T ₂
...Timer for heater, T ₂ a...Timer contact for heater, S/SW...Start switch,
HL...High limit, BZ...Buzzer, SW...
Power switch.

Claims (1)

[Claims] 1. A frying device equipped with an oil tank containing oil for frying food, a heating means for heating the oil in the oil tank, and a thermostat for controlling the heating means to maintain the oil at an appropriate temperature. A timer is provided to turn on the heating means when the food to be cooked is put into the oil tank, and the set time of the timer is set such that when the oil temperature drops due to the food to be cooked, the thermostat is activated and the heating means is turned on. An oil temperature adjustment device for a deep-fried food cooker, characterized in that the oil temperature adjustment device is set to a slightly longer time than the cooking time.