JPS5986824A - Cooking temperature sensing device - Google Patents

Abstract

PURPOSE:To sense always a correct cooking material even if a calory of heating source such as fire in a cooking burner is varied by a method wherein operating means composed of thermal conducting plate arranged on a supporting container of a temperature sensor and a reversible shape memory alloy operated in such a way the thermal conducting plate is operated to reduce a contact area with the supporting container as temperature is increased. CONSTITUTION:As temperature of atmosphere around a supporting container 2 is increased, working part 6 composed of reversible shape memory alloy shows deformation in shape and a movable connecting rod 7 accepting the deformation force causes the thermal conducting plate 5 to be rotated around a rotary supporting shaft 2a. As a result, a contact area between the thermal conducting plate 5 and the supporting container 2, i.e. a thermal conducting area is reduced and a calory to be transmitted from the bottom of pan to the temperature sensor 1 is reduced. If a deformation of the working part 6 is set in such a way as a reduction amount of thermal transmittance and a calory received in the temperature sensor 1 become equal to each other, the temperature sensor 1 can always detect a correct adjusting temperature even if the atmosphere temperature is varied.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a structure that detects temperature by mechanically contacting an object whose temperature is to be detected, for example, when cooking in a pot, detects the temperature of the contents through the bottom of the pot. The present invention relates to a cooking temperature detection structure for detecting cooking temperature.

Conventional structure and its problems Conventionally, from the viewpoint of optimizing the finished state of cooking contents in hotpot cooking and improving the economic efficiency of heat sources, temperature sensors (e.g. thermistors, thermocouples) have been used to measure the temperature of cooking contents.
The amount of heat generated by a heat source has been controlled by detecting the electrical characteristics.

FIG. 1 is a cross-sectional view showing a cooking temperature detection structure using a gas staple as an example using city gas or propane gas as a heat source.
The temperature sensor 1 is configured to be in mechanical contact with the bottom of the supporting container 2 or the pot 3, and detects the temperature of the temperature sensor 1 or the bottom of the pot 3 to determine the temperature of the cooking contents. The purpose is to control the calorific value (firepower) of the food, optimize the finished state of the cooking contents, and improve the economic efficiency of the heat source.

For this purpose, it is necessary for the temperature sensor 1 to accurately and reproducibly detect the temperature of the cooking contents, and for this purpose, it is necessary to prevent the temperature from being affected by heat other than the bottom of the pot 3, or to keep it constant at all times. I hope so.

However, the temperature sensor 1 is affected by the heat caused by the surrounding air being heated by the radiant heat from the flame of the stove burner 4 and the atmospheric temperature near the temperature sensor 1 rising, and also by the strength of the heating power of the stove burner 4. Since the ambient temperature is different, the thermal influence on the temperature sensor 1 is also different. Naturally, the stronger the firepower is, the greater the thermal influence on the temperature sensor 1 is. That is, in the conventional configuration, the stronger the firepower, the larger the temperature difference between the temperature detected by the temperature sensor 1 and the temperature of the cooking contents, and the temperature sensor 1 has the disadvantage that it cannot always accurately detect the temperature of the cooking contents. Was. Unfortunately, in a configuration where the cooking temperature detection device is located near the heat source as shown in FIG. 1, the thermal influence is unavoidable.

OBJECTS OF THE INVENTION The present invention solves such conventional drawbacks by providing a cooking temperature detection structure that can always accurately detect the temperature of cooking contents even if the heat generated by a heat source such as the heating power of a stove burner varies. is intended to provide.

Structure of the Invention To achieve this object, the present invention provides a support container for a temperature sensor, a heat exchanger plate provided on the support container, and a contact area between the heat exchanger plate and the support container that increases as the temperature increases. Actuation means are provided which are comprised of a reversible shape memory alloy which actuates to decrease.

With this configuration, when the ambient temperature near the temperature sensor rises, the reversible shape memory alloy that deforms due to temperature changes deforms, and the heat transfer plate that transfers heat from the pot operates to support the temperature sensor. By reducing the contact area with the container, that is, the heat transfer area, and reducing the amount of heat transferred from the pot to the temperature sensor by the amount of heat received from the temperature sensor due to the increase in ambient temperature, the negative effects of the atmosphere/11.4 degrees can be reduced. The temperature of the contents being cooked can be detected at any time without being affected.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In FIGS. 2 and 3, the same members as in FIG. 1 are designated by the same numbers.

FIG. 2 shows the cooking temperature detection structure of the present invention, in which FIG. 2A is a front view taken along line CC7 in FIG. 2B, and FIG. 2B is a plan view.

Note that FIG. 2 shows a state where the amount of heat generated by the heat source is small, that is, the ambient temperature is low.

In the figure, reference numeral 6 denotes a heat transfer plate made of a material with good thermal conductivity that transfers heat from the bottom of the pot. The supporting container 2 is inserted between the shafts 2' and 2' and is positioned as shown in FIG. 2 when the heating value of the heat source is the minimum, such as a stove burner.

Reference numeral 6 denotes an actuating part made of an oJ inverse shape memory alloy which has been subjected to memory treatment so that its shape changes with temperature changes. They are connected by a movable side connecting piece 7. On the other hand, one side of the operating part 6 is connected and fixed to a fixed part 2b provided on the outer periphery of the support container 2 by a fixed side connecting rod 8 which is also made of a material with low thermal conductivity.

FIG. 3 is a plan view showing the operating state of the heat transfer plates when the heat source generates a large amount of heat, that is, when the ambient temperature near the support container 2 is high.

When the ambient temperature near the support container 2 increases, such as when the heat source has a large calorific value, the actuating part 6 made of a reversible shape memory alloy that has been subjected to memory treatment to change its shape due to temperature changes changes its shape. The movable connecting rod 7 or the heat exchanger plate 5, which receives the force due to the deformation, is rotated about the rotating support shaft 2a as shown in FIG. 3. As a result, the contact area between the heat exchanger plate 5 and the support container 2, that is, the heat transfer area becomes smaller, and the amount of heat transferred from the bottom of the pot to the temperature sensor 1 decreases. If the amount of deformation of the actuating section 6 is set so that the amount of decrease in the amount of heat transfer is equal to the amount of heat received by the temperature sensor 1 due to the ambient temperature, the temperature sensor 1 will be able to move to the ambient temperature! I'i'
Since it is possible to always accurately detect the temperature of the pot bottom rAI', that is, the temperature of the cooking contents, even if the temperature is different, unlike the conventional configuration, the temperature of the pot bottom detected by the temperature sensor 1 differs depending on the ambient temperature. The problem will be resolved.

Furthermore, in the present invention, since the operating part 6 is made of a reversible shape memory alloy, it acts to return to its original shape when the ambient temperature drops, and the heat exchanger plate 5 is also returned to its original position by the moving side connecting rod 7. Since it returns to normal, there is no problem with temperature detection even if the ambient temperature fluctuates.

In the embodiment, the activation and return of the heat exchanger plate 6 is performed by the movable side connecting rod 7 inserted into the heat exchanger plate 5, and there is no need to stick to this configuration, for example, the heat exchanger plate is connected to the movable side. It may be activated by pushing the side surface of the heat exchanger plate 5 with the rod 7, and the return to the original position may be performed by providing a spring on the rotating support shaft 2a.

Furthermore, when the pot 1 is bent, in order to keep the heat transfer area between the pot bottom and the heat transfer plate constant, two heat transfer plates 5 are stacked, and the upper heat transfer plate is fixed to the support container 2. A configuration in which the lower heat exchanger plate is activated may also be used.

Effects of the Invention As described above, the cooking temperature detection structure of the present invention provides the following effects.

(1) As the ambient temperature near the temperature sensor support container rises, the actuating part made of a reversible shape-memory alloy that changes its shape operates the heat transfer plate connected to it, and the heat transfer plate and the supporting capacity are transferred. The heat mj product is reduced, and the amount of heat transferred from the bottom of the pot to the hot pot is reduced by the amount of heat received by the temperature sensor due to the ambient temperature.As a result, the temperature sensor is The temperature at the bottom of the pot, that is, the temperature of the contents being cooked, can always be detected accurately.

(2) The operating part is made of a reversible shape memory alloy. Even if the shape of one end changes, it will return to its original shape once the ambient temperature drops, and the heat exchanger plate will also return to its original position. Even if the ambient temperature fluctuates, there is no problem with temperature detection by the temperature sensor.

(3) The heat exchanger plate does not require any power source to operate; it simply utilizes the shape change of a reversible shape memory alloy, so it can be constructed with small parts, and the cooking temperature detection device The reliability of the device is high because it is compact and the configuration can be simplified.

In addition, the cooking temperature detection structure of the present invention is applicable to gas staples as well as
It can also be applied to cookers whose heat source is electricity, oil, etc.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a conventional cooking temperature detection structure using a gas staple as a heat source such as city gas, and FIG. 2 shows an embodiment of the cooking temperature detection structure according to the present invention. , FIG. 2A is a sectional view taken along the line CC' of FIG. 2B, FIG. 2B is a plan view, and FIG. 3 is a plan view showing an embodiment of the present invention. 2...Support container, 5...Heat exchange plate, 6...
・Operating part.

Claims (1)

[Claims] The temperature sensor includes a support container, a heat exchanger plate provided on the support container, and a reversible shape memory alloy that operates so that the contact area of the heat exchanger plate with the support container decreases as the temperature increases. A cooking temperature detection device comprising: