JP2006084066A - Temperature detecting device for gas cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature detecting device capable of accurately detecting a temperature of a cooking utensil put on a gas cooking stove. <P>SOLUTION: This temperature detecting device 7 has a temperature sensing body (sensor) 9 in an inner cylinder 8, an upper end opening is closed by a heat collection cap 10, the temperature sensing body 9 is kept into contact with a rear face of the heat collection cap 10, and a spring 11 is mounted between a bottom face of the inner cylinder 8 and a rear face of the heat collection cap 10 in a compressed state to energize the heat collection gap 10 upward. Further an outer cylinder 13 is mounted outside of the inner cylinder 8. The outer cylinder 13 has the cup-shape, and is provided with an opening for dropping dust on its bottom part, and a heat insulating layer 15 is formed on an outer face of the outer cylinder 13, so that its inner area is not directly affected by the flame of a gas burner. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a temperature detection device for a gas stove that detects a temperature by contacting a bottom surface of a cooking utensil such as a pan or a frying pan.

  Recently, the temperature of cooking utensils such as pans and frying pans that are put on the gas stove is measured by contacting the temperature sensor protruding upward from the center of the gas stove, and the gas stove that controls the gas supply according to the measured temperature It is commercially available.

  In the gas stove provided with the above-described temperature sensor, the measurement temperature tends to be higher than the bottom surface temperature of the actual cooking utensil because the flame of the gas fluctuates and contacts the temperature sensor. In particular, in the case of an internal flame type burner in which the flame is directed inward, the draft is not easily generated, and the detection temperature may rapidly increase when the flame directly touches the heat collecting cap covering the sensor or the sensor. Even if the flame is not directly touched, the radiant heat of the flame is strong and the temperature sensor is overheated, and the detected temperature may be affected and become high. Therefore, proposals have been made to prevent the sensor from overheating due to the flame of the gas burner.

  The sensor overheating prevention means can be broadly classified into a method for preventing the sensor from being overheated by cooling air or air flow, and a method for preventing overheating due to the flame of the gas burner by means of a heat insulation structure. 3 is known.

  In Patent Document 1, a heat collecting cap is put on the inner cylinder, the thermistor housed in the inner cylinder is adhered to the back surface of the heat collecting cap, and an outer cylinder is arranged outside the inner cylinder. A structure is disclosed in which a substantially sealed space is formed between the space and the space to block the action of hot air on the inner cylinder due to disturbance or combustion conditions.

  Patent Document 2 shows a structure in which a thermostat is housed in a sensor cover in a state of being biased upward via a spring, and in particular, heat insulation between the support plate supporting the upper end of the spring and the lower surface of the thermostat ( A structure in which a packing having a low thermal conductivity is interposed has been proposed.

In Patent Document 3, the upper end opening of a holder (inner cylinder) is closed with a contact heat collecting part (heat collecting cap), a thermistor is attached to the lower surface (back surface) of the contact heat collecting part, and the holder (inner cylinder) ), A structure in which a heat shield cylindrical portion is arranged at an interval is disclosed.
Japanese Patent Laid-Open No. 11-201461 JP 2000-249341 A JP 2001-272039 A

  In the structure disclosed in Patent Document 2 described above, heat from the burner flame directly acts on the sensor cover housing the thermostat, so even if a heat insulating packing is interposed between the support plate and the thermostat lower surface. However, the influence of the flame on the thermostat (sensor) cannot be avoided.

  In the structures disclosed in Patent Documents 1 and 3, since the outer cylinder is provided, the influence on the sensor is reduced as compared with Patent Document 2, but the heat from the burner flame still acts directly on the outer cylinder. Therefore, the sensor tends to detect a temperature higher than the bottom surface temperature of an actual pan or the like.

  In order to solve the above problems, a temperature detection device for a gas stove according to the present invention includes an inner cylinder that houses a temperature detection element such as a thermostat, and an outer cylinder that is disposed outside the inner cylinder with a gap between the inner cylinder and the inner cylinder. A heat insulating layer is provided on at least one of the outer surface, the outer surface of the outer tube, and the inner surface of the outer tube.

  By providing the heat insulating layer on the outer surface of the outer cylinder, it is possible to suppress overheating in a wide range including the inner cylinder, and to increase the accuracy of the detected temperature.

  In addition, when a heat insulating layer is provided on the inner side surface of the outer cylinder or the outer side surface of the inner cylinder, it is possible to suppress overheating in a range including the inner cylinder as described above, and the heat insulating layer directly contacts the flame. Since it is not exposed, durability of a heat insulation layer improves. In addition, when providing a heat insulation layer in both the outer surface and inner surface of an outer cylinder, since a heat insulation layer can be formed without a mask simultaneously by both surfaces by a dipping method, it becomes advantageous in terms of manufacturing cost.

  As the heat insulation layer, a heat ray reflective layer made of tin oxide, ITO (indium tin oxide) or the like is formed by vapor deposition, sputtering, or a sol-gel wet process, or an inorganic lightweight aggregate such as shirasu balloon or pearlite is used. Like the heat insulating material couple | bonded with the inorganic type binder, it comprises with a heat insulating material which has fire resistance and heat resistance.

  The temperature detection device for a gas stove according to another invention of the present application includes an inner cylinder that houses the temperature detection element, and an outer cylinder that is disposed with a gap outside the inner cylinder, and the inside of the inner cylinder and the inner cylinder At least one of the gaps between the outer cylinder and the outer cylinder was filled with a heat insulating material.

  By filling the inside of the inner cylinder with a heat insulating material, the temperature detection element is surrounded by the heat insulating material, there is no external heat disturbance, and it is in direct contact with the cooking utensil, so an accurate temperature is detected. be able to.

As the heat insulating material having fire resistance and heat resistance, an inorganic lightweight aggregate such as shirasu balloon or pearlite bonded with an inorganic binder, or a heat ray reflective layer on the surface of the heat insulating material for suppressing radiant heat. Can be mentioned.

  According to the temperature detection device for a gas stove according to the present invention, since the heat radiation of the gas burner is shut off and sufficient heat insulation measures are taken even if the flame sways and contacts the outer cylinder, an accurate temperature can be measured. it can.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a view showing a gas stove to which a temperature detection device according to the present invention is applied, FIG. 2 (a) is a sectional view of the temperature detection device, and (b) is a view of the temperature detection device from below.

  The gas stove is provided with five virtues 2 on the top surface of the top plate 1 and a casing 3 attached to the lower side of the top plate 1. A soup pan 4 is provided in the casing 3, and an internal flame burner 5 is disposed outside the soup pan 4.

  Further, a temperature detection device 7 extends upward through an opening 6 formed in the soup pan 4. The temperature detection device 7 houses a temperature sensing element (sensor) 9 such as a thermistor or a thermostat in an inner cylinder 8, the upper end opening is closed with a heat collecting cap 10, and 9 is brought into contact with the back surface of the heat collecting cap 10. Further, the spring 11 is further compressed between the bottom surface of the inner cylinder 8 and the back surface of the heat collecting cap 10 to urge the heat collecting cap 10 upward.

  The heat collecting cap 10 is urged upward by a spring 11 but is not detached from the inner cylinder 8 by a stopper (not shown), and the upper surface of the heat collecting cap 10 is not applied with any external force. Since it is set to be slightly higher than the upper surface of the virtues 2, the upper surface of the heat collecting cap 10 is surely in contact with the bottom surface of the cooking utensil 12 in a state where the cooking utensil 12 such as a pan is put on the stove. Moreover, since the temperature sensing body 9 is in contact with the back surface of the heat collecting cap 10, the temperature of the bottom surface of the cooking utensil 12 can be measured directly.

  An outer cylinder 13 is arranged outside the inner cylinder 8. The outer cylinder 13 has a cup shape. Then, an opening 14 is formed on the bottom surface of the outer cylinder 13 to prevent dust and the like from being accumulated, and a heat insulating layer 15 is formed on the outer surface of the outer cylinder 13, so that the flame of the gas burner directly affects the inner region. I try not to reach it.

  As a method of forming the heat insulating layer 15, a method of forming a heat ray reflective coating film such as tin oxide or ITO by sputtering, a sol-gel process, or the like, a paint in which an inorganic lightweight aggregate such as shirasu balloon or pearlite is kneaded in an inorganic binder The method of apply | coating or spraying is mentioned. When the heat insulating layer 15 is composed of an inorganic lightweight aggregate and an inorganic binder, no harmful gas is generated even when exposed to high temperatures.

  3 to 8 are cross-sectional views of a temperature detection device according to another embodiment. In another embodiment shown in FIG. 3, a heat insulating layer 15 is formed on the inner surface of the outer cylinder 13. When the heat insulating layer 15 is formed at this position, the flame of the burner does not act directly, so that the durability of the heat insulating layer 15 is improved.

  In the embodiment shown in FIG. 4, the heat insulating layer 15 is formed on the outer side surface and the inner side surface of the outer cylinder 13. If it is formed on both sides, the heat insulation effect is further enhanced. In particular, when a heat insulation layer is formed by dipping, it is not necessary to use a mask, and thus the production becomes easy.

  In the embodiment shown in FIG. 5, a heat insulating layer 15 is formed on the outer surface of the inner cylinder 8. With such a configuration, it is possible to increase the durability of the heat insulating layer and reduce the construction area as compared with the case where it is formed on the surface of the outer cylinder.

  In the embodiment shown in FIG. 6, instead of forming the heat insulating layer on the side surface of the inner cylinder 8 or the outer cylinder 13, a part or all of the space S formed between the inner cylinder 8 and the outer cylinder 13 is insulated. 16 is used for filling. In this case, it is sufficient to form the heat insulating material 16 in a predetermined shape in advance, and the manufacture is easy. Further, it can be applied later to an existing temperature detection device.

  In the embodiment shown in FIG. 7, a heat insulating layer 15 as a heat ray reflective coating film is formed on the surface of the heat insulating material 16. By setting it as such a structure, two functions, heat insulation and heat ray reflection, can be achieved by one member.

  In the embodiment shown in FIG. 8, the heat insulating material 16 is filled in the inner cylinder 8. Thus, by putting the heat insulating material 16 in the inner cylinder 8, the heat from the outside that affects the temperature sensing body 9 is blocked, while the temperature sensing body 9 is in contact with the back surface of the cap 10, so that an accurate temperature is obtained. Can be measured.

In these embodiments, a metal inner cylinder and an outer cylinder are shown, but a heat insulating layer can also be used as an outer cylinder.
It is also possible to combine the embodiments shown in the above figures, and a cap similar to Patent Document 1 may be provided between the cap 10 and the outer cylinder so as to provide a closed space between the inner cylinder and the outer cylinder. The structure of the temperature detection device is not limited to the illustrated structure as long as the structure includes an inner cylinder and an outer cylinder, or a structure that also serves as an outer cylinder by a heat insulating layer.

  The temperature detection device for a gas stove according to the present invention is effectively used for controlling cooking temperature, preventing emptying, and the like.

The figure which shows the gas stove which applied the temperature detection apparatus which concerns on this invention (A) is sectional drawing of the same temperature detection apparatus, (b) is the figure which looked at the same temperature detection apparatus from the bottom Sectional drawing of the temperature detection apparatus which concerns on another Example Sectional drawing of the temperature detection apparatus which concerns on another Example Sectional drawing of the temperature detection apparatus which concerns on another Example Sectional drawing of the temperature detection apparatus which concerns on another Example Sectional drawing of the temperature detection apparatus which concerns on another Example Sectional drawing of the temperature detection apparatus which concerns on another Example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Top plate, 2 ... Gotoku, 3 ... Casing, 4 ... Juice saucer, 5 ... Burner, 6 ... Opening, 7 ... Temperature detection apparatus, 8 ... Inner cylinder, 9 ... Temperature sensing body (sensor), 10 ... Heat collection 11 for a spring, 12 for a cooking utensil, 13 for an outer cylinder, 14 for an opening, 15 for a heat insulating layer, 16 for a heat insulating material.

Claims (6)

In the temperature detection device for a gas stove that detects the temperature of the cooking utensil by contacting the bottom surface of the cooking utensil heated by the gas stove, the temperature detection device for the gas stove includes an inner cylinder that houses a temperature detection element, and an outer side of the inner cylinder. And a heat insulating layer is provided on at least one side surface of the outer surface of the inner tube, the outer surface of the outer tube, and the inner surface of the outer tube. A temperature detection device for gas stoves. The temperature detection device for a gas stove according to claim 1, wherein the heat insulating layer is a heat ray reflective layer made of tin oxide, ITO or the like. The temperature detection device for a gas stove according to claim 1, wherein the heat insulating layer is made of a fireproof and heat resistant heat insulating material. In the temperature detection device for a gas stove that detects the temperature of the cooking utensil by contacting the bottom surface of the cooking utensil heated by the gas stove, the temperature detection device for the gas stove includes an inner cylinder that houses a temperature detection element, and an outer side of the inner cylinder. And a gas stove temperature characterized in that at least one of the inner cylinder and the gap between the inner cylinder and the outer cylinder is filled with a heat insulating material. Detection device. 5. The temperature detecting device for a gas stove according to claim 4, wherein the heat insulating material is formed of a fireproof and heat resistant heat insulating material. 6. The temperature detection device for a gas stove according to claim 5, wherein a heat ray reflective layer is provided on a surface of the heat insulating material.