JP6017498B2 - Temperature detection device - Google Patents

Description

  The present invention relates to a temperature detection device that is pressed against the bottom of a cooking vessel placed on the virtues of a gas stove and detects the temperature of the cooking vessel.

  2. Description of the Related Art A temperature detection device is widely known that protrudes from the center of an annular shaped stove burner and detects the temperature of a cooking container that is cooked by the stove burner. The temperature detection device is attached to the support pipe standing at the center opening of the stove burner, a substantially cylindrical holder fitted to the support pipe so as to be movable in the vertical direction, and closing the upper surface of the holder. A heat collecting plate, a temperature sensor attached to the lower surface of the heat collecting plate, and a coil spring for urging the holder upward.

  This temperature detection device is attached in such a manner that the upper surface of the heat collecting plate protrudes above the surface on which the cooking container is placed on the virtues of the stove burner. For this reason, when the cooking container is placed on Gotoku, the heat collecting plate and the holder are pushed down by the bottom of the cooking container, and the heat collecting plate is pressed against the bottom of the cooking container by the coil spring that biases the holder; Become. As a result, the temperature of the cooking container can be detected by the temperature sensor attached to the heat collecting plate. And if the temperature of the cooking container during cooking can be detected, for example, by detecting that the temperature of the cooking container has risen too much and automatically reducing the heating power of the cooker burner, Generation etc. can be avoided. Alternatively, it is possible to cook while maintaining the set temperature by detecting that the temperature of the cooking container has dropped below the set temperature and automatically increasing the heating power of the stove burner.

  Also, if the holder is beaten by the flame of a stove burner during cooking, the holder becomes hot due to the radiant heat from the flame, and the heat of the holder is transmitted to the heat collecting plate, so the correct temperature of the cooking container can be detected. It becomes difficult. Therefore, the holder is covered with a cylindrical holder cover to prevent the holder from being burned by a flame, and a gap is provided between the holder cover and the heat collecting plate to prevent the heat from being transferred to the heat collecting plate. It has been proposed that the holder cover be attached in a state of being damaged (Patent Document 1).

JP 2008-170038 A

  However, in the proposed temperature detection device, if an abnormality that does not decrease the heating power for some reason occurs despite the fact that the heating power is automatically reduced, the occurrence of the abnormality is immediately detected. There was a problem that could not. This is due to the following reason. First, most of the heat transmitted to the heat collecting plate of the temperature detection device is heat transmitted from the bottom of the cooking container. Therefore, the temperature detection device cannot detect a temperature change unless the temperature of the cooking container changes. And since a cooking container has a large heat capacity, even if the heating power of a stove burner is made small, the temperature of a cooking container does not fall immediately. For this reason, it is possible to detect the occurrence of an abnormality only when it is understood that the temperature of the cooking container does not drop easily even though the firepower is reduced. As a result, until the occurrence of the abnormality is known, cooking is continued with a large heating power, and the cooked product is burnt.

  Similarly, even if the heating power cannot be increased automatically for some reason, the occurrence of an abnormality is detected only when it is detected that the temperature of the cooking container does not rise easily. There is a problem that it cannot be detected.

  The present invention has been made in response to the above-described problems of the prior art, and provides a temperature detection device that can quickly detect that an abnormality has occurred in the function of adjusting the heating power of a stove burner. With the goal.

In order to solve the above-described problems, the temperature detection device of the present invention employs the following configuration. That is,
In the temperature detection device for detecting the temperature of the cooking container placed on the Gotoku, provided at the central opening of the annular shaped stove burner,
A support pipe erected in the opening of the stove burner;
A metal holder that is formed in a substantially cylindrical shape and is coaxially fitted into the support pipe, and is movable in the vertical direction;
A heat collecting plate that forms an abutting portion that abuts on the cooking container by being attached to the upper end of the holder;
A temperature sensor attached to the lower surface of the heat collecting plate;
A coil spring for urging the holder upward;
A metal holder cover that is formed in a substantially cylindrical shape larger in diameter than the holder and is provided outside the holder, and shields the holder from radiant heat of the stove burner,
Between the upper end of the holder cover and the contact portion, there are provided a plurality of heat transfer portions that transmit heat of the holder cover to the heat collecting plate ,
The heat transfer portion is characterized in that a portion in contact with the holder cover or the contact portion is formed flat .

In such a temperature detection device of the present invention, a metal holder is fitted in a support pipe erected in the center of the stove burner so as to be movable in the vertical direction, and a heat collecting plate is attached to the upper end of the holder. Thus, the contact portion is formed and urged upward by a coil spring. For this reason, when the cooking container is heated by the stove burner, the heat collecting plate comes into contact with the bottom of the cooking container, so that the temperature of the cooking container can be detected using a temperature sensor attached to the heat collecting plate. It becomes possible. Further, a metal holder cover formed in a cylindrical shape larger in diameter than the holder is attached to the outside of the holder, so that the holder is not burned by radiant heat from the flame of the stove burner. A plurality of heat transfer portions are formed between the upper end of the holder cover and the contact portion to transmit the heat of the holder cover to the heat collecting plate, and the heat transfer portion contacts the holder cover or the contact portion. The part to be formed is formed flat.

In this way, when the heating power of the stove burner is changed, the amount of radiant heat received by the holder cover changes, so the amount of heat transferred from the holder cover to the heat collecting plate changes, and as a result, the temperature detected by the temperature sensor changes. In this way, if the heating power of the stove burner is changed, the result can be detected as a temperature change in a short time, so if the heating power is not changed for some reason, the occurrence of an abnormality is detected immediately. It becomes possible to do. In addition, the heat transfer part has a flat part that comes into contact with the holder cover or the contact part, so that a contact area for transferring heat from the holder cover to the heat collecting plate can be secured, and heat is transferred. It is easy. As a result, the temperature change detected by the temperature sensor increases when the heating power of the stove burner is changed, so that it is possible to reliably detect an abnormality that does not change the heating power.

  Moreover, in the temperature detection apparatus of this invention mentioned above, it is good also as forming a several heat-transfer part at mutually equal intervals with respect to the circumferential direction of a heat collecting plate.

  In this way, the size of the flame of the stove burner varies from place to place, and as a result, even if the temperature of the holder cover becomes uneven in the circumferential direction, the heat collecting plate will be universal from the entire circumference of the holder cover. Since heat flows in without any influence, it is possible to correctly detect that the heating power of the stove burner has been changed without being affected by the temperature deviation in the circumferential direction.

  Moreover, in the temperature detection apparatus of this invention mentioned above, you may form a heat-transfer part by protrudingly providing a convex part from the upper end of a holder cover.

  In this way, it is possible to easily form a plurality of heat transfer parts without increasing the number of parts.

  Or in the temperature detection apparatus of this invention mentioned above, you may form a heat-transfer part by protrudingly providing a convex part from the lower surface of a contact part.

  Even in this case, a plurality of heat transfer portions can be easily formed without increasing the number of components.

It is sectional drawing which shows the structure of the gas stove 1 carrying the temperature detection apparatus 100 of a present Example. 2 is a cross-sectional view showing an internal structure of a thermal head 110. FIG. FIG. 6 is a cross-sectional view showing another aspect of the thermal head 110. It is explanatory drawing which shows a mode that the holder cover 115 of a present Example is attached to the holder 111. FIG. It is explanatory drawing about the path | route through which heat is transmitted to the heat collecting plate. It is explanatory drawing about the reason which can detect rapidly that abnormality generate | occur | produced in the adjustment function of the heating power of a stove burner. It is explanatory drawing which shows a mode that the holder cover 115 of a 1st modification is attached to the holder 111. FIG. It is explanatory drawing which shows a mode that the holder cover 115 of a 2nd modification is attached to the holder 111. FIG.

  FIG. 1 is a cross-sectional view showing the structure of a gas stove 1 equipped with a temperature detection device 100 of the present embodiment. The gas stove 1 is provided by covering the top surface of the stove body (not shown) and having the burner opening 4 formed thereon, and facing the burner opening 4 to burn the fuel gas and cooking. A stove burner 10 for heating the container, Gotoku 3 in which a cooking container such as a pan is placed, and a temperature detecting device 100 for detecting the presence or absence of the cooking container placed on Gotoku 3 are provided.

  The stove burner 10 includes a burner body 11 formed in an annular shape, a mixing tube 12 extending from the burner body 11, and an annular burner head 13 placed on the upper surface of the burner body 11. ing. The burner head 13 is made of die-cast aluminum or the like, and a plurality of grooves (flame grooves) are formed on the lower surface side of the outer peripheral portion. When the burner head 13 is placed on the burner body 11, a plurality of flame openings 13 a are formed between the plurality of flame opening grooves formed in the burner head 13 and the upper surface of the burner body 11.

  An injection nozzle 23 attached to the tip of the fuel gas supply passage 20 is provided at the opening end of the mixing tube 12 extending from the burner body 11. When fuel gas is injected from the injection nozzle 23 into the mixing pipe 12, a mixed gas of fuel gas and air is generated inside the mixing pipe 12 and supplied to the burner body 11. The fuel gas supply passage 20 is connected to a fuel gas main plug via a flow rate adjusting valve 22 and an open / close electromagnetic valve 21. For this reason, when the solenoid valve 21 and the flow rate adjusting valve 22 are opened, the fuel gas is ejected from the injection nozzle 23, the mixed gas is generated in the mixing pipe 12, and the mixed gas flows out from the flame port 13a. The combustion of the stove burner 10 can be started by igniting the mixed gas with a spark plug (not shown). The operation of the solenoid valve 21, the flow rate adjustment valve 22, and a spark plug (not shown) is controlled by the control unit 50.

  An opening 10 a is formed at the center of the stove burner 10, and a support pipe 120 is erected inside the opening 10 a, and a substantially cylindrical thermal head 110 is supported at the upper end of the support pipe 120. The pipe 120 is slidably attached. The temperature detecting device 100 of this embodiment is formed by the thermal head 110 and the support pipe 120. As will be described in detail later, the thermal head 110 has a built-in temperature sensor and a coil spring, and the coil spring urges the thermal head 110 upward. The upper end of the thermal head 110 protrudes from the upper surface of Gotoku 3 (the surface on which the cooking container is placed). When the cooking container is placed on Gotoku 3, the thermal head 110 is pushed down at the bottom of the cooking container, and the upper end of the thermal head 110 is pressed by a coil spring and comes into contact with the bottom of the cooking container. For this reason, it becomes possible to detect the temperature of the bottom part of a cooking container with the temperature sensor incorporated in the thermal head 110. FIG.

  Further, a lead wire is drawn out from the temperature sensor of the thermal head 110 and connected to the control unit 50 through the inside of the support pipe 120. For this reason, the control unit 50 can detect the temperature of the cooking container even during cooking, and when the temperature of the cooking container is excessively increased, the flow rate adjustment valve 22 is throttled to reduce the flow rate of the fuel gas. Thus, the heating power of the stove burner 10 can be reduced. Conversely, when the temperature of the cooking container is lower than the set target temperature, the heating power of the stove burner 10 can be increased by opening the flow rate adjusting valve 22 and increasing the flow rate of the fuel gas. . Further, when it is determined that some abnormality such as a failure has occurred, the combustion of the stove burner 10 can be stopped by closing the solenoid valve 21 and stopping the supply of fuel gas.

  FIG. 2 is an explanatory diagram showing the internal structure of the temperature detecting device 100 by taking a cross section of the thermal head 110. The thermal head 110 includes a substantially cylindrical holder 111 made of sheet metal, a metal heat collecting plate 112 attached so as to close the upper end of the holder 111, and a temperature attached to the lower surface of the heat collecting plate 112. The sensor 113 includes a metal holder cover 115 that is formed in a substantially cylindrical shape larger in diameter than the holder 111 and provided outside the holder 111, and a coil spring 114 that biases the holder 111 upward. . A flange portion 111a is formed at the upper end of the holder 111, and the heat collecting plate 112 is bent so as to wrap the flange portion 111a from above, and is fixed by crimping. Therefore, the flange portion 111a of the holder 111 and the heat collecting plate 112 form an abutting portion 116 that abuts the bottom surface of the cooking container.

  The upper end of the support pipe 120 to which the thermal head 110 is attached is expanded in a flange shape. The support pipe 120 is movable in the axial direction of the holder 111 by inserting a portion enlarged in a flange shape into the holder 111. Further, since the lower end side of the holder 111 is reduced in diameter, even if the holder 111 moves while the portion of the upper end of the support pipe 120 whose diameter is increased in a flange shape is inserted into the holder 111, the holder 111 moves away from the support pipe 120. It will not come off. Further, the coil spring 114 is accommodated in the holder 111 in a slightly compressed state, and therefore, the thermal head 110 is always urged upward. In addition, two lead wires 130 are drawn out from the temperature sensor 113 and are connected to the control unit 50 (see FIG. 1) through the inside of the support pipe 120.

  In the thermal head 110 of the present embodiment, the heat collecting plate 112 is attached by bending the flange portion 111a formed at the upper end of the holder 111 so that the heat collecting plate 112 wraps and crimping. It is supposed to be. However, the method of attaching the heat collecting plate 112 to the upper end of the holder 111 is not limited to such a method. For example, as shown in FIG. 3A, the flange portion 111a and the heat collection plate 112 are brazed (or with the heat collection plate 112 placed on the flange portion 111a provided at the upper end of the holder 111 (or The heat collecting plate 112 may be attached by welding). Also in this case, the contact portion 116 is formed by the flange portion 111a of the holder 111 and the heat collecting plate 112, but a member that forms the lower surface side of the contact portion 116 (therefore, a member that faces the upper end of the holder cover 115). ) Becomes the flange portion 111a.

  Alternatively, as shown in FIG. 3 (b), the heat collecting plate 112 is positioned after providing the convex portion 112 b (or the concave portion) on the heat collecting plate 112 without providing the flange portion 111 a at the upper end of the holder 111. May be attached to the upper end of the holder 111 by brazing (or welding) or the like. In this case, the heat collecting plate 112 forms the contact portion 116, and therefore, the heat collecting plate 112 faces the upper surface of the holder cover 115.

  FIG. 4 is an enlarged view showing a detailed shape of the upper end portion of the thermal head 110 of this embodiment. FIG. 4A shows the external shape of the upper end portion, and FIG. 4B shows how the holder cover 115 is assembled to the holder 111. As shown in FIG. 4, a plurality of heat transfer portions 115 a protrude from the upper end of the holder cover 115 of this embodiment at equal intervals. The holder cover 115 is assembled in a state where the contact portion 115b of the heat transfer portion 115a is in contact with the lower surface side of the contact portion 116. For this reason, when the holder cover 115 is burned by the flame of the stove burner 10, a part of the heat of the holder cover 115 is transmitted to the heat collecting plate 112 through the heat transfer section 115a. In addition, although the three heat transfer parts 115a are provided in the holder cover 115 of a present Example, the number of the heat transfer parts 115a can also be made into two, or four or more.

  FIG. 5 is an explanatory diagram showing a state in which heat is transmitted to the heat collecting plate 112 of the temperature detection device 100 during cooking of the cooking container. As described above, when the cooking container is placed on Gotoku 3 (see FIG. 1), the cooking container pushes down the abutting portion 116 of the temperature detecting device 100, so that the bottom of the cooking container and the heat collecting plate 112 are in close contact with each other. To do. For this reason, when the cooking container is heated by the flame of the stove burner 10, heat flows into the heat collecting plate 112 from the bottom of the cooking container. The white arrow shown in the drawing represents the flow of heat flowing into the heat collecting plate 112 through the bottom of the cooking container.

  Further, as described above, in the temperature detection device 100 of the present embodiment, the heat transfer part 115 a is provided at the upper end of the holder cover 115, and the heat transfer part 115 a is in contact with the lower surface side of the contact part 116. . For this reason, when the holder cover 115 becomes hot due to the radiant heat from the flame of the stove burner 10, heat also flows from the heat transfer portion 115 a at the upper end of the holder cover 115 into the heat collecting plate 112. The arrow indicated by a broken line in the drawing represents a state in which the radiant heat of the flame of the stove burner 10 flows into the heat collecting plate 112 from the heat transfer portion 115a of the holder cover 115. Since the temperature detecting device 100 according to the present embodiment is provided with a path through which heat flows from the holder cover 115 to the heat collecting plate 112 as described above, an abnormality occurs in the function of automatically adjusting the heating power of the stove burner 10. Even in such a case, it is possible to detect this quickly.

  FIG. 6 illustrates the reason why the temperature detection apparatus 100 according to the present embodiment can quickly detect the occurrence of an abnormality even when an abnormality occurs in the function of automatically adjusting the heating power of the stove burner 10. FIG. FIG. 6A illustrates a temperature change detected by the temperature detection device 100 of the present embodiment. Further, FIG. 6B shows a temperature change detected when the heat transfer unit 115a of the holder cover 115 is not provided in the temperature detection device 100 of the present embodiment for reference.

  For convenience of explanation, first, the case where the heat transfer portion 115a of the holder cover 115 is not provided will be described with reference to FIG. For example, when stewed cooking is performed, the temperature of the cooking container gradually rises when heating is started and stabilizes at a certain temperature. However, if the heating is continued as it is, a decrease in the amount of broth in the cooking container is caused. Then the temperature of the cooking container begins to rise again. When the temperature of the cooking container reaches a preset threshold temperature Tth, the control unit 50 controls the flow rate adjusting valve 22 to reduce the flow rate of the fuel gas, thereby automatically heating the cooker 10. Make it smaller. A time ta in FIG. 6 represents the timing when the control unit 50 reduces the thermal power. Usually, since the cooking container has a large heat capacity and the temperature is rising, the temperature of the cooking container rises for a while after the heating power is reduced at the time ta, but eventually begins to decline. For this reason, the temperature detected by the temperature detection device 100 changes slowly as shown by the solid line in FIG.

  Here, it is assumed that the thermal power does not actually decrease even when the control unit 50 performs control to reduce the thermal power of the stove burner 10 due to, for example, a failure of the flow rate adjustment valve 22. In this case, since the heating power remains large, the temperature of the cooking container rises as it is. However, as described above, even when the control by the control unit 50 is performed normally, it is not uncommon for the temperature of the cooking container to rise for a while after the heating power becomes small, so the temperature rise continues. Just because it is not possible to immediately determine that it is abnormal. Then, after a certain amount of time has passed since the control for reducing the thermal power at time ta, it is possible to detect the occurrence of an abnormality only when the temperature continues to rise.

  When the occurrence of abnormality is detected, the control unit 50 closes the electromagnetic valve 21 and stops the combustion in the stove burner 10, and accordingly, the temperature of the cooking container also decreases. However, since the heating with a large heating power is continued until then, the temperature of the cooking container has greatly increased as shown by the broken line in FIG. Has occurred.

  On the other hand, FIG. 6A shows a temperature change detected by the temperature detection device 100 of the present embodiment. Immediately after the heating in the stove burner 10 is started, even when the temperature detection device 100 of the present embodiment is used, the temperature gradually rises and once stabilized at a certain temperature, if the heating is continued as it is again The temperature begins to rise. When the temperature reaches the threshold temperature Tth, the control unit 50 controls the flow rate adjustment valve 22 to reduce the flow rate of the fuel gas, thereby reducing the heating power of the stove burner 10.

  Here, as described above, in the temperature detection device 100 of the present embodiment, the plurality of heat transfer portions 115a protruding from the upper end of the holder cover 115 are in contact with the lower surface side of the contact portion 116 (see FIG. 4). ) When the holder cover 115 is heated by radiant heat from the flame of the stove burner 10, a part of the heat of the holder cover 115 flows from the heat transfer section 115a into the heat collecting plate 112 (see FIG. 5). For this reason, when the control unit 50 reduces the heating power of the stove burner 10, the radiant heat of the flame received by the holder cover 115 decreases, so the heat flowing into the heat collecting plate 112 from the heat transfer unit 115a also decreases, and the temperature detection device The temperature detected at 100 begins to drop in a short time. As a result, as indicated by a solid line in FIG. 6A, when the control unit 50 reduces the heating power of the stove burner 10 at time ta, the effect appears in the detected temperature of the temperature detecting device 100 in a short time.

  Of course, the amount of heat flowing into the heat collecting plate 112 from the heat transfer portion 115a of the holder cover 115 is smaller than the amount of heat flowing in from the bottom of the cooking vessel, so the temperature drop that occurs when the heating power of the stove burner 10 is reduced is not much. Not big. However, as shown by the broken line in FIG. 6A, if the temperature drop cannot be detected even when the control unit 50 performs control to reduce the thermal power, the thermal power is not actually reduced. It can be determined that some abnormality has occurred. In this case, since only a short time has elapsed since the control for reducing the thermal power is performed, if the solenoid valve 21 is closed and combustion in the stove burner 10 is stopped, scorching in the cooking container is avoided. It becomes possible to do.

  Although the case where the control unit 50 reduces the thermal power has been described above, the same applies to the case where the thermal power of the stove burner 10 is increased. That is, when the heat transfer part 115a is not projected from the holder cover 115 of the temperature detection device 100, and heat does not flow into the heat collecting plate 112 from the holder cover 115 via the heat transfer part 115a, If the temperature of the cooking container does not rise, heat does not flow into the heat collecting plate 112, and no temperature rise is detected. For this reason, even when the control unit 50 performs control to increase the thermal power, even if the thermal power does not actually increase, the occurrence of the abnormality can be detected if a certain amount of time has not elapsed. Can not.

  On the other hand, in the temperature detection device 100 of the present embodiment, the heat transfer portion 115a protruding from the upper end of the holder cover 115 is in contact with the lower surface side of the abutting portion 116, and the heat collecting plate is removed from the holder cover 115. Heat flows into 112. For this reason, when the control unit 50 increases the heating power of the stove burner 10, the holder cover 115 is heated by the radiant heat of the flame of the stove burner 10, and part of the heat flows into the heat collecting plate 112 through the heat transfer unit 115a. Therefore, the temperature detected by the temperature detection device 100 increases in a short time. In other words, if the temperature rise is not detected even when the control unit 50 performs control to increase the thermal power, it is determined that the thermal power is not actually increased and some abnormality has occurred. Is possible.

  As described above, in the temperature detection device 100 of the present embodiment, the upper end of the holder cover 115 and the contact portion 116 are in contact with each other via the heat transfer portion 115a. The effect of adjusting the heating power is immediately reflected in the detected temperature. For this reason, even if an abnormality in which the heating power cannot be adjusted for some reason, it is possible to quickly detect the occurrence of the abnormality.

  Further, as shown in FIG. 4B, when the holder cover 115 is attached, the upper end of the holder cover 115 and the lower surface side of the contact portion 116 are brought into contact with each other via the heat transfer portion 115a. A gap between the upper end of the holder cover 115 and the lower surface side of the contact portion 116 can be managed. For this reason, it is also possible to reduce the manufacturing variation of the temperature detection device 100.

  Furthermore, in the temperature detection apparatus 100 of the present embodiment, a plurality of (three in the example shown in FIG. 4) heat transfer portions 115a are provided at equal intervals in the circumferential direction. For this reason, even when the holder cover 115 is not heated uniformly because the size of the flame formed in the circumferential direction by the stove burner 10 is uneven, the heat collecting plate is in a state where the unevenness is averaged. Heat can be transferred to 112. As a result, it is possible to accurately detect that the heating power of the stove burner 10 has been adjusted.

  In addition, if the contact portion 115b of the heat transfer portion 115a of the holder cover 115 is formed in a flat shape, a contact area between the heat transfer portion 115a of the holder cover 115 and the lower surface side of the contact portion 116 is secured. can do. For this reason, not only can the holder cover 115 be stabilized when the holder cover 115 is assembled, but also the amount of heat flowing from the holder cover 115 to the heat collecting plate 112 via the heat transfer section 115a can be increased. As a result, since the temperature change detected by the temperature detection device 100 increases with the change in the heating power of the stove burner 10, it is possible to easily detect that an abnormality has occurred in the heating power adjustment function.

  Moreover, in the temperature detection apparatus 100 of the present embodiment described above, it has been described that the three heat transfer portions 115a protrude from the upper end of the holder cover 115, but an annular shape is formed outside the heat transfer portions 115a. An outer wall may be provided. FIG. 7 is an explanatory view showing, in an enlarged manner, the upper end portion of the thermal head 110 of the first modified example in which an annular outer peripheral wall 115c is provided outside the heat transfer section 115a. FIG. 7A shows the external shape of the upper end portion, and FIG. 7B shows how the holder cover 115 is assembled to the holder 111. Even in the holder cover 115 of such a modified example, since the heat transfer part 115a is assembled in a state of being in contact with the lower surface side of the contact part 116, the influence of adjusting the heating power of the stove burner 10 is immediately reflected in the detected temperature. . For this reason, even if an abnormality in which the heating power cannot be adjusted for some reason, it is possible to quickly detect the occurrence of the abnormality.

  In the temperature detection device 100 of the present embodiment or the first modification described above, the heat transfer portion 115a is projected from the upper end of the holder cover 115. However, the heat transfer portion 115a protrudes from the lower surface of the contact portion 116. You may project the heat | fever part 115a. Further, even when the heat transfer portion 115a is protruded from the lower surface of the contact portion 116, the contact portion 115b where the heat transfer portion 115a contacts the upper surface of the holder cover 115 may be flat.

  FIG. 8 is an explanatory view showing, in an enlarged manner, the upper end portion of the thermal head 110 of the second modified example in which three heat transfer portions 115 a are projected from the lower surface of the contact portion 116 toward the holder cover 115. FIG. 8A shows the appearance of the upper end portion, and FIG. 8B shows how the holder cover 115 is assembled to the holder 111. In the illustrated example, the heat collecting plate 112 is formed so that the heat collecting plate 112 wraps around the flange portion 111 a (see FIG. 2) of the holder 111. It protrudes from the heat collecting plate 112 that forms the lower surface side. On the other hand, as shown in FIG. 3A, when the member forming the lower surface side of the contact portion 116 is the flange portion 111a of the holder 111, the heat transfer portion 115a protrudes from the flange portion 111a. You may make it.

  Even the holder cover 115 of such a modified example is assembled while being in contact with the holder cover 115 protruding from the abutting portion 116, so that the effect of adjusting the heating power of the stove burner 10 is immediately reflected in the detected temperature. . For this reason, even if an abnormality in which the heating power cannot be adjusted for some reason, it is possible to quickly detect the occurrence of the abnormality.

  The temperature detection device 100 according to the present embodiment and various modifications has been described above, but the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof. is there.

1 ... gas stove, 2 ... top plate, 3 ... virtues,
10 ... Stove burner, 10a ... Opening, 11 ... Burner body,
12 ... Mixing tube, 13 ... Burner head, 20 ... Fuel gas supply passage,
21 ... Solenoid valve, 22 ... Flow control valve, 23 ... Injection nozzle,
50: Control unit, 100: Temperature detection device, 110: Thermal head,
111 ... Holder, 112 ... Heat collecting plate, 113 ... Temperature sensor,
114 ... Coil spring, 115 ... Holder cover, 115a ... Heat transfer part,
115b ... contact portion, 115c ... outer peripheral wall, 116 ... contact portion,
120 ... support pipe, 130 ... lead wire.

Claims (4)

In the temperature detection device for detecting the temperature of the cooking container placed on the Gotoku, provided at the central opening of the annular shaped stove burner,
A support pipe erected in the opening of the stove burner;
A metal holder that is formed in a substantially cylindrical shape and is coaxially fitted into the support pipe, and is movable in the vertical direction;
A heat collecting plate that forms an abutting portion that abuts on the cooking container by being attached to the upper end of the holder;
A temperature sensor attached to the lower surface of the heat collecting plate;
A coil spring for urging the holder upward;
A metal holder cover that is formed in a substantially cylindrical shape larger in diameter than the holder and is provided outside the holder, and shields the holder from radiant heat of the stove burner,
Between the upper end of the holder cover and the contact portion, there are provided a plurality of heat transfer portions that transmit heat of the holder cover to the heat collecting plate ,
The temperature detecting device is characterized in that the heat transfer portion is formed flat at a portion in contact with the holder cover or the contact portion . The temperature detection device according to claim 1,
The plurality of heat transfer units are formed at equal intervals with respect to the circumferential direction of the heat collecting plate. In the temperature detection device according to claim 1 or 2,
The temperature detecting device, wherein the heat transfer part is a convex part protruding from an upper end of the holder cover . In the temperature detection device according to any one of claims 1 to 3,
The temperature detection device, wherein the heat transfer part is a convex part protruding from a lower surface of the contact part .

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