JPH0455628A - Electrical heating and cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric cooking device using a heat source such as a halogen lamp.

BACKGROUND OF THE INVENTION Conventionally, as shown in FIG. 5, this type of electric cooking appliance consists of a main body L with an open upper part, a top glass 2 provided in the opening of the main body 1, and a horizontal cross section of most of the parts. has a circular shape with a part 3 cut inside, the vertical section has a bottom and a bordered outer periphery, a dish-shaped heater insulating material 4, and a heater that houses this heater insulating material 4. It consists of a case 5, a heater 6 installed inside a heater insulating material 4, a heater unit 7 which is housed inside the appliance body 1 and whose upper part is installed in contact with the top glass 2, this heater unit, and a horizontal section of the door. A temperature sensor 8 located in the cut-out part 3 inside the shape and having a detection part in contact with the back surface of the top glass 2, and a control circuit that controls power to the heater unit based on the temperature detected by the temperature sensor 8. It was composed of 9. In the above configuration, when performing temperature slowing operation such as cooking tempura, the cooking container 1 is placed on the top glass 2.
0, the temperature sensor 8 is located in the part 3 where a part of the circular shape is cut into the inside, so it is located under the bottom surface of the cooking container 10 through the top glass 2. Therefore, the temperature sensor 8 was detecting the temperature of the cooking container 10 through the top glass 2, that is, the temperature of the tempura oil or the like. Then, the control circuit 9 receives this detected value and controls the power to the heater unit 7 to adjust the temperature.

Problems to be Solved by the Invention However, in the above configuration, the temperature sensor 8 is located in the part 3 where a part of the shape of the heater unit 7 is cut into the inside, so it is surrounded by the atmosphere of that part. , was not affected by the heat generated by the heater 6. However, by detecting the temperature on the back surface of the top glass 2,
The temperature of the cooking container 10 could be faithfully detected as being lower by the temperature drop due to the thermal resistance of the top glass 2.

However, since there is a large time delay due to the heat resistance of the top glass 2, oil temperature fluctuations are too large during tempura cooking, resulting in a problem that tempura cannot be cooked properly. For example, in Figure 6, 200g of potatoes are added to 1100g of oil.
is turned on at time t1, the detected temperature 11 of the temperature sensor falls to the ON set temperature, the heater 6 is reenergized, and the oil temperature 12 decreases by about 39 degrees until the temperature starts to rise again. C1 time required approximately 120 seconds. As described above, there was a problem in that oil temperature fluctuations were too large and tempura could not be cooked properly.

In addition, as shown in FIG. 7, when the amount of oil is low during heating, the detected temperature 11 of the temperature sensor is set to OFF because there is a large time delay due to the thermal resistance of the top glass 2. There was also a safety issue in that the oil temperature 12 reached the ignition temperature before reaching the temperature and ignited.

The present invention solves the problem that, in the method in which a temperature sensor detects the temperature on the back side of the top glass, there is a large time delay due to the thermal resistance of the top glass, so when cooking tempura, oil temperature fluctuations are too large and tempura cannot be cooked properly. The purpose of this invention is to solve the safety problem that when the amount of oil is small, the oil ignites before the temperature detected by the temperature sensor 8 reaches the off set temperature.

Means for Solving the Problems and In order to achieve the above object, the electric heating cooker of the present invention includes a heater at the bottom of a thermally conductive member on which a cooking container is placed, and a connection between the cooking container and the heater. a temperature sensor for detecting temperature, and a sensor insulation tube that makes the temperature detected by the temperature sensor higher by a predetermined temperature than the temperature of the cooking container, which is provided around the temperature sensor and isolated from the heater. It is.

Function The electric heating cooker of the present invention has the above-mentioned configuration, so that the heat transmitted to the temperature sensor brought into contact with the lower part of the heat conductive member is transmitted through the sensor heat insulating cylinder in addition to the heat transmitted from the cooking container through the heat conductive member. Since the heat transmitted from the heater is added to the cooking container, the temperature detected by the temperature sensor becomes higher than the temperature inside the cooking container.

Additionally, when the heater changes from on to off, no heat is transferred from the heater to the temperature sensor through the sensor insulation tube, so the rate of decrease in temperature detected by the temperature sensor is approximately the same as the rate of decrease in temperature of the cooking container. It will be similar.

Also, if the capacity of the food to be cooked in the cooking container is small,
The rate of increase in temperature detected by the temperature sensor is almost the same as the rate of increase in temperature of the cooking container because the heat transferred to the temperature sensor is added to the heat transferred from the heater through the heat conduction member from the cooking container. Become.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1V to 4. In addition! The same parts as those in 51ffi are given the same numbers and will be explained.

In FIGS. 1 and 2, 7 is a heater unit,
A heater insulating material 4 having an open top and side and bottom surfaces and a dish-shaped vertical cross section, a heater case 5 that houses the heater insulating material 4, and a heater such as a halogen bulb installed inside the heater insulating material 4. 6. A hole 13 provided in the center of the bottom of the heater insulating material 4 through the heater case 5; a cylindrical hole provided vertically around this hole at the same height as the side surface of the heater insulating material 4; It is composed of a sensor heat insulating cylinder 14.

Reference numeral 8 denotes a temperature sensor, and the detection surface of the temperature sensor 8 is placed inside the sensor insulation tube 14 of the heater unit 7 in contact with the back surface of the top glass 2, which is a heat conductive member.

It is provided. The sensor heat insulating cylinder 14 is installed on the top glass 2 of the cooking container 1 corresponding to the sensor insulation cylinder 14.
The thickness A of the sensor insulation tube 14 is determined so that the temperature detected by the temperature sensor 8 is higher than the oil temperature within 0 by the set temperature range due to the heat of the heater 6. A control circuit 9 receives the temperature detected by the temperature sensor 8 and controls power to the heater unit 7 to adjust the temperature.

Next, the operation of the configuration of this embodiment will be explained. Temperature detection by the temperature sensor 8 includes the temperature of the cooking container 1o detected via the top glass 2, as well as the temperature detected by the sensor insulation tube j4.
Since the heat from the heater 6 is applied through the cooking container 10, the temperature becomes higher than the oil temperature in the cooking container 10. Therefore, when cooking tempura by adding ingredients when the heater 6 is off, since no heat is applied from the heater 6, the rate of decrease in the temperature detected by the temperature sensor 8 is lower than the rate of decrease when only the oil temperature is detected. It becomes larger and becomes almost the same value as the temperature drop rate of the oil. Therefore, the temperature sensor 8 can quickly reach the ON set temperature.

Therefore, since the time delay due to the heat resistance of the top glass 2 is large, oil temperature fluctuations are too large during tempura cooking, and the problem of not being able to cook tempura properly can be solved.

For example, in the third time, if 200 g of potatoes are added to 1100 g of oil at time t1, the detected temperature 11 of the temperature sensor will drop to the ON setting temperature, the heater 6 will be re-energized, and the oil temperature 12 will rise again. It takes about 60 seconds for one hour to reach a temperature of about 27°C before it starts to rise, which is much shorter than before.

Furthermore, even when the amount of oil is small during heating, the temperature detected by the temperature sensor 8 is determined by the temperature detected by the sensor heat insulating tube 14 in addition to the value detected by the temperature of the cooking container 10 via the top glass 2, as shown in FIG. Since the heat from the heater 6 is added through the heater 6, the rate of increase in the temperature 11 detected by the temperature sensor is almost the same as the rate of increase in the oil temperature 12, and the time delay due to the thermal resistance of the top glass 2, which is the conventional technology, is large. , temperature sensor detection temperature 1
The problem that the oil temperature 12 reaches the ignition temperature before the oil temperature 12 reaches the off set temperature can be solved.

Effects of the Invention As described above, the present invention provides a temperature sensor at the lower part of the heat conduction member and a sensor insulation cylinder that insulates the temperature sensor, and the temperature detected by the temperature sensor is higher than the temperature of the cooking container installed on the heat conduction member. By determining the thickness of the cylindrical portion of the sensor heat insulation cylinder so that the temperature is higher by a predetermined temperature range, the temperature detected by the temperature sensor becomes higher than the temperature of the cooking container. Therefore, when the heater is switched from on to off, heat from the heater is no longer applied, so the rate of decrease in the temperature detected by the temperature sensor becomes approximately the same as the rate of decrease in temperature of the cooking container. This speeds up the response of the temperature sensor, and also allows the temperature sensor to reach the on-set temperature faster.
This has the effect of reducing temperature fluctuations within the cooking container. Furthermore, when the capacity of the food to be cooked is small, the heat transmitted to the temperature sensor is not only the heat transmitted from the cooking container via the heat conductive member, but also the heat transmitted from the heater through the sensor insulation cylinder. The rate of increase in the detected temperature is almost the same as the rate of increase in temperature inside the cooking container, resulting in faster response.

Therefore, the risk that the temperature of the cooking container becomes higher than the off set temperature before the detected temperature of the temperature sensor reaches the off set temperature is eliminated, and safety is ensured.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an electric heating cooker according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the main part of the cooker, and Fig. 3 is the temperature when cooking tempura with the cooker. Figure 4 is a temperature characteristic diagram when heating a small amount of oil using the same cooker.
Figure 5 is a partially cutaway perspective view of a conventional electric heating cooker, Part 6 is a temperature characteristic diagram when cooking tempura with the same cooker, and Figure 7 is a temperature characteristic diagram when heating a small amount of oil with the same cooker. It is. 2...Top glass (thermal conductive member), 6...
...Heater, 8...Temperature sensor, 10...
...Cooking container, 14...Sensor insulation cylinder. Agent's name: Patent attorney Shigetaka Awano 1 person N'<Hemiki 1 hour 2-) - Rough 0 Crow 6- Heag δ-: L, 7! 〱ump/　　　　　　　　　　　〉〉〉〉〉〉〉〉〉〉〉〉

Claims (1)

[Claims] a heat conductive member on which a cooking container is placed; a heater provided below the heat conductive member to heat the cooking container; and a heater provided below the heat conductive member to detect the temperatures of the cooking container and the heater. an electric heating cooking device, comprising: a temperature sensor; and a sensor insulation tube that is provided around the temperature sensor and isolated from the heater and makes the temperature detected by the temperature sensor a predetermined temperature higher than the temperature of the cooking container.