JP2016102634A - Temperature detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detection device capable of simultaneously satisfying various requests for a thermal head.SOLUTION: A thermal head fixed to an upper end of a holder and abutted against a cooking container by a coil spring when the cooking container is placed on a trivet is formed as follows. At first, a temperature sensor is stored together with filling material in a metallic cup having a bottom part with at least one of copper or aluminum being applied as a main component. Under a state in which the cup having a bottom part is pressed with a cup pressing plate, it is caulked at an outer peripheral part of an iron alloy heat collection plate. With this arrangement, since the heat collection plate is made of iron alloy, it is possible to assure durability against the bottom part of the cooking container and further it is assembled through caulking, its mass production can be carried out. Further, the temperature sensor is stored in the metallic cup having a bottom part with at least one of the copper or aluminum being applied as a main component to cause a disturbance of characteristic not to occur and it is also possible to assure a sufficient temperature responding characteristic.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a temperature detection device that comes into contact with the bottom of a cooking vessel placed on the virtues of a gas stove and detects the temperature of the cooking vessel.

  There is widely known a temperature detection device that projects from the center of a stove burner and detects the temperature of a cooking container that is cooked by the stove burner. This temperature detection device includes a thermal head with a built-in temperature sensor, a holder attached to the upper end of the thermal head, a support pipe attached in such a manner that the holder can move in the vertical direction, and between the holder and the support pipe. And a coil spring that biases the holder upward. In the state where the cooking container is not placed on the virtues, the temperature detection device is in a state where the thermal head protrudes from the surface on which the cooking container is placed. For this reason, when the cooking container is placed on Gotoku, the temperature detecting device is pushed down at the bottom of the cooking container, and the thermal head comes into contact with the bottom of the cooking container. As a result, the temperature of the cooking container can be detected by the temperature sensor built in the thermal head.

  Here, it is desired that the thermal head can quickly transmit the temperature of the cooking container in contact with the built-in temperature sensor (that is, the temperature responsiveness is good). It is also important that there is little variation in characteristics due to individual differences. Further, since the thermal head rubs against the bottom of the cooking container during cooking, it is also necessary to have sufficient durability against wear and scraping by the bottom of the cooking container. Of course, it is also strongly required that it can be manufactured at low cost by mass production.

  Conventionally, the thermal head that is required to be used in various ways is combined with a metal-made thermal head made by machining or the like (Patent Document 1) and a pressed stainless steel sheet metal part. A thermal head (Patent Document 2) has been used.

JP 2000-283856 A JP 2008-170038 A

  However, any of the thermal heads that have been used conventionally has a problem that various requirements for the thermal head cannot be satisfied at a sufficient level at the same time. For example, a thermal head combined with stainless steel sheet metal parts can be manufactured in large quantities and at low cost by pressing, and since the thermal head can be formed of stainless steel, wear due to the bottom of the cooking vessel. Sufficient durability can be ensured against cutting and scraping. However, since stainless steel has poor thermal conductivity, the temperature response cannot be sufficiently satisfied, and in addition, due to the variation in manufacturing of sheet metal parts, gaps are generated between the sheet metal parts, and characteristics due to individual differences. There is a drawback that variations tend to occur.

  On the other hand, a thermal head with an integrated structure, such as by machining, can be made of a metal with good thermal conductivity (such as brass) to ensure sufficient temperature responsiveness. Variations in characteristics due to differences are less likely to occur. However, a metal having good thermal conductivity is liable to be worn and scraped by the bottom of the cooking vessel, and further, it has a drawback that it is difficult to manufacture at a low cost by mass production. As described above, the conventional thermal head cannot satisfy the demands for durability and mass production when trying to satisfy the demands for temperature responsiveness and variation, and conversely, it satisfies the demands for durability and mass production. As a result, there has been a problem that the demand for temperature responsiveness and variation cannot be satisfied.

  The present invention has been made in response to the above-mentioned problems of the prior art, and is applied to a thermal head with respect to temperature responsiveness, variation in characteristics due to individual differences, durability against wear and abrasion, and ease of mass production. It is an object of the present invention to provide a temperature detection device capable of satisfying all requests simultaneously at a sufficient level.

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 that is provided in the stove burner and detects the temperature of the cooking container placed on Gotoku,
A support pipe attached upward from the stove burner;
A holder attached to the support pipe in a manner movable in the vertical direction;
A thermal head attached to the upper end of the holder;
A coil spring for urging the holder upward,
The thermal head is
A bottomed cup made of metal mainly composed of at least one of copper or aluminum having a convex portion formed on the outer periphery of the bottom;
A temperature sensor housed together with a filler in the bottomed cup;
A cup pressing plate which is formed in a circular shape having an opening in the center, and holds the convex portion of the bottomed cup at the opening;
And a heat collecting plate made of an iron alloy that has an outer diameter larger than that of the cup pressing portion and that is crimped to the cup pressing portion by bending an outer peripheral portion thereof.

  In such a temperature detection device of the present invention, when the cooking container is placed on the virtues, the thermal head comes into contact with the cooking container while being biased by the coil spring. In this thermal head, a temperature sensor is housed together with a filler in a metal bottomed cup mainly composed of at least one of copper and aluminum, and the bottomed cup is pressed by a cup pressing plate. It is formed by crimping at the outer periphery of the alloy heat collecting plate.

  In this way, the heat collecting plate that rubs against the bottom of the cooking vessel can be made of an iron alloy, so that sufficient durability can be secured against wear and scraping due to the bottom of the cooking vessel, and caulking by press Can be assembled at low cost by mass production. Although the detailed mechanism will be described later, the temperature sensor is housed in the bottomed cup, and further, the bottomed cup is formed of a metal material mainly composed of at least one of copper and aluminum. There is no variation in characteristics due to individual differences, and sufficient temperature responsiveness can be secured. As a result, it is possible to realize a temperature detection device that can satisfy various requirements for the thermal head at a sufficient level simultaneously.

  Moreover, in the temperature detection apparatus of this invention mentioned above, it is good also as forming a circular flange part in the upper end of a holder, and crimping | stopping the flange part to a heat collecting board with a cup pressing plate.

  If it carries out like this, when attaching a heat collecting board to the upper end of a holder, a cup pressing board and a bottomed cup can be attached simultaneously. In addition, since the caulking can be stopped over the entire circumference of the flange portion of the holder, there is no possibility that oil smoke or simmered juice enters the inside of the temperature detecting device from the caulking stopped portion and deteriorates the characteristics. .

  Moreover, in the temperature detection apparatus of the present invention described above, the holder and the cup pressing plate may be formed of an iron alloy material in the same manner as the heat collecting plate.

  In this way, when the holder and the cup pressing plate are swaged with the heat collecting plate, the holder and the cup pressing plate will not be stretched (so-called “sagging” will not occur). can do. As a result, oil smoke or boiled juice does not enter the inside of the temperature detection device from the location where the crimping is stopped, and it is possible to prevent the characteristics from deteriorating even when used for a long time.

  Further, in the temperature detection device of the present invention described above, the portion where the cup pressing plate presses the convex portion of the bottomed cup is formed in a concave shape, and the side facing the heat collecting plate of the bottomed cup and the cup pressing plate is: It is good also as a state which made the bottomed cup protrude from the cup pressing plate to the heat collecting plate side.

  If it carries out like this, a clearance gap will be made between a cup pressing plate and a heat collecting board by the part which the bottomed cup protruded from the cup pressing plate. Then, when the heat collecting plate is swaged in that state, the heat collecting plate is swaged in a state in which the gap formed between the cup and the cup pressing plate is narrowed. For this reason, since the heat collecting plate is pressed against the bottomed cup by the elasticity of the heat collecting plate, the heat collecting plate and the bottomed cup can be reliably brought into contact with each other. As a result, it is possible to prevent variations in characteristics due to the occurrence of a gap between the heat collecting plate and the bottomed cup.

It is sectional drawing which shows the structure of the gas stove 1 carrying the temperature detection apparatus 100 of a present Example. It is sectional drawing which shows the internal structure of the temperature detection apparatus 100 of a present Example. It is explanatory drawing which illustrated the method of assembling the temperature sensor 114 in the bottomed cup 113 of a present Example. It is explanatory drawing about the case where a bubble is confine | sealed in the bottomed cup 113. FIG. It is explanatory drawing which shows a mode that the thermal head 110 of a present Example is assembled | attached to the holder 120. FIG. It is explanatory drawing which shows a mode that a thermal head is assembled | attached with the conventional temperature detection apparatus 100. FIG. It is explanatory drawing which shows the reason for the characteristic variation easily arising in the conventional thermal head due to the dropping of the heat collecting plate 111. It is explanatory drawing which shows the reason the variation in a characteristic is not eliminated even if the sensor accommodating part 213 is press-fit in the heat collecting plate 111 with the conventional thermal head. It is explanatory drawing which shows the reason for the characteristic variation resulting from the caulking stop of the heat collecting plate 111 in the conventional thermal head. It is explanatory drawing which shows the reason that the variation in the characteristic resulting from the crimping stop of the heat collecting plate 111 does not arise in the temperature detection apparatus 100 of a present Example. It is explanatory drawing which shows the evaluation result about the temperature responsiveness of the temperature detection apparatus 100 of a present Example. It is explanatory drawing about the reason for which favorable temperature responsiveness is acquired with the temperature detection apparatus 100 of a present Example.

  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, a temperature detection device 100 for detecting the temperature of the cooking container in contact with the bottom of the cooking container placed on Gotoku 3 and the like ing.

  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-casting such as aluminum or forging, 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. A burner cap 14 made of sheet metal is attached to the upper part of the burner body 11.

  When fuel gas is injected into the mixing pipe 12 from the upstream opening end 12a of the mixing pipe 12 extending from the burner body 11, a mixed gas of fuel gas and air is generated inside the mixing pipe 12, The gas is supplied to the burner body 11 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 the spark plug 15. An air supply passage 10a is formed in the center of the stove burner 10, and a temperature detection device 100 is provided inside the air supply passage 10a.

  The temperature detection device 100 includes a support pipe 130 erected in the air supply passage 10a, a holder 120 attached to the support pipe 130 so as to be movable in the vertical direction, and a thermal head attached to the upper end of the holder 120. 110. As will be described in detail later, a temperature sensor is built in the thermal head 110, and a coil spring is built in the holder 120. As a result of the coil spring urging the holder 120 upward, the upper end of the thermal head 110 protrudes from the upper surface (the surface on which the cooking container is placed) of the thermal head 110 when the cooking container is not placed on the Gotoku 3. It is in a state. 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 surface of the thermal head 110 is pushed up by the 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.

  FIG. 2 is a cross-sectional view showing the internal structure of the temperature detecting device 100 of the present embodiment. The holder 120 constituting the temperature detecting device 100 is formed in a substantially cylindrical shape by a stainless steel plate. A thermal head 110, which will be described later, is attached to the upper end of the holder 120, and the lower end side of the holder 120 is reduced in diameter over a predetermined length and attached to the support pipe 130 in a movable state. A boiled soup cover 123 is attached to the reduced diameter portion of the lower end side of the holder 120.

  The thermal head 110 includes a stainless steel heat collecting plate 111 that is in contact with the bottom of the cooking container, a temperature sensor 114 from which a lead wire 114a is drawn, a cylindrical bottomed cup 113 that houses the temperature sensor 114, and a bottom. A filler 115 filled in a gap between the cup 113 and the temperature sensor 114 and a cup pressing plate 112 for pressing a convex portion 113a formed on the outer periphery of the bottom of the bottomed cup 113 are provided. The cup pressing plate 112 is made of stainless steel like the heat collecting plate 111, but the bottomed cup 113 is made of a metal material mainly composed of copper or aluminum. Here, the metal material containing copper or aluminum as a main component refers to a metal material containing copper or aluminum in a ratio of 1/3 or more. Therefore, pure copper or pure aluminum also corresponds to a metal material mainly composed of copper or aluminum. Moreover, about both copper and aluminum, the metal material whose content rate is 1/3 or more may be sufficient. The filler 115 is filled in the gap between the bottomed cup 113 and the temperature sensor 114 to promote heat transfer from the bottomed cup 113 to the temperature sensor 114, and the temperature sensor 114 falls off the bottomed cup 113. It has a function to prevent this. The thermal head 110 is attached to the holder 120 by crimping the outer peripheral portion of the heat collecting plate 111 to the flange portion 120a formed at the upper end of the holder 120 together with the outer peripheral portion of the cup pressing plate 112. .

  A spring receiver 122 that supports the coil spring 121 is provided at a lower position inside the holder 120. The spring receiver 122 is attached to the upper end of the support pipe 130, but is movable in the vertical direction with respect to the holder 120. A coil spring 121 is housed between the thermal head 110 inside the holder 120 and the spring receiver 122 in a slightly compressed state. Therefore, the holder 120 is always urged upward by the coil spring 121.

  FIG. 3 is an explanatory view illustrating a method of assembling the temperature sensor 114 in the bottomed cup 113. As one method of assembling the temperature sensor 114 in the bottomed cup 113, the following method can be adopted. First, as shown in FIG. 3A, the temperature sensor 114 is inserted into the cylindrical body 113b of the bottomed cup 113 from the opening. Then, as shown in FIG. 3B, the liquid filler 115 before solidification is placed between the bottomed cup 113 and the temperature sensor 114 with the opening of the bottomed cup 113 facing upward. Pour a predetermined amount into. As the filler 115, a ceramic heat-resistant adhesive can be preferably used. If left in that state for a while, the liquid filler 115 solidifies, and the temperature sensor 114 is assembled (see FIG. 3C).

  When assembling the temperature sensor 114 in such a manner, the amount of the filler 115 flowing into the gap between the bottomed cup 113 and the temperature sensor 114 is just filled with the bottomed cup 113, and the liquid level of the filler 115 is It is good to set to the predetermined amount which becomes a concave shape (refer FIG.3 (c)). By doing so, it is possible to avoid enclosing air bubbles in the gap between the bottomed cup 113 and the temperature sensor 114 for the following reason. In other words, it is assumed that bubbles are trapped in a gap between the bottomed cup 113 and the temperature sensor 114 when the filler 115 is poured. Since the volume of the filling material 115 to be poured is set to the above-mentioned predetermined amount, the surface of the filling material 115 rises from the bottomed cup 113 as shown in FIG. It overflows from 113. For this reason, it can be easily recognized that air bubbles are contained in the stage where the filler 115 is poured into the bottomed cup 113. Of course, in some cases, the process of pouring the filler 115 may be automated, so that it may not be noticed that bubbles have been trapped at the stage of pouring the filler 115. However, even in this case, if air bubbles are confined, as shown in FIG. 4B, the surface of the filler 115 is solidified in a state of rising from the bottomed cup 113, so that the air bubbles are confined. Can be easily recognized. For this reason, it is possible to avoid assembling the thermal head 110 using the bottomed cup 113 in which bubbles are sealed in the gap between the bottomed cup 113 and the temperature sensor 114. After the temperature sensor 114 is attached to the bottomed cup 113 in this manner, the thermal head 110 is then assembled by attaching the bottomed cup 113 to the heat collecting plate 111.

  FIG. 5 is an exploded view showing how the thermal head 110 of this embodiment is assembled by attaching the bottomed cup 113 together with the holder 120 to the heat collecting plate 111. FIG. 5A shows an exploded view in which the thermal head 110 of this embodiment is assembled to the holder 120. In addition, in order to avoid that a figure becomes complicated, illustration is abbreviate | omitted about the coil spring 121. FIG.

  As shown in the figure, the heat collecting plate 111 before being assembled to the holder 120 is a disk-shaped part formed by pressing a stainless steel sheet with a shallow squeezing, and the outer periphery of the disk is caulked over the entire circumference. A processed portion 111a is formed. In the figure, the crimping portion 111 a is displayed as being erected substantially at a right angle to the heat collecting plate 111. However, the crimping process part 111a should just be formed in the outer periphery of the heat collecting plate 111, for example, may be erected diagonally upward from the heat collecting plate 111, and also the heat collecting plate 111 It may be formed on the same plane. In the present embodiment, the crimped portion 111a corresponds to the “outer peripheral portion” in the present invention.

  The bottomed cup 113 is placed almost at the center of the heat collecting plate 111, and the cup pressing plate 112 is placed so as to press the convex portion 113a of the bottomed cup 113 from above. As shown in FIG. 5A, the cup pressing plate 112 is a disc-shaped stainless steel part having an opening 112a in the center, and the size of the opening 112a is that of the body 113b of the bottomed cup 113. Although it is larger than the outer diameter, it is smaller than the convex 113a. Therefore, the bottomed cup 113 is opened at the opening 112a of the cup pressing plate 112 by covering the cup pressing plate 112 over the bottomed cup 113 so that the body 113b of the bottomed cup 113 is passed through the opening 112a. The convex portion 113a can be pressed down. In FIG. 5 (a), the opening 112a of the cup pressing plate 112 is shown as being circular, but the shape of the opening 112a can hold down the convex 113a of the bottomed cup 113. If it is, it does not have to be circular.

  Further, the outer diameter of the cup pressing plate 112 is formed to be smaller than the inner diameter of the crimped portion 111 a of the heat collecting plate 111. Further, the side of the cup pressing plate 112 that contacts the bottomed cup 113 is formed in a concave shape so that the convex portion 113a of the bottomed cup 113 can be accommodated. For this reason, the cup pressing plate 112 is placed in the heat collecting plate 111 by covering the cup pressing plate 112 over the bottomed cup 113.

  And the holder 120 is mounted so that the outer peripheral part of the cup pressing plate 112 may be pressed by the flange part 120a from above. The outer diameter of the flange portion 120 a of the holder 120 is formed to be approximately the same as the outer diameter of the cup pressing plate 112. For this reason, when the holder 120 is placed on the cup pressing plate 112, the flange portion 120 a of the holder 120 is also accommodated in the heat collecting plate 111. After that, as shown in FIG. 5B, the flange 120a of the holder 120 is crimped to the heat collecting plate 111 so that the crimped portion 111a of the heat collecting plate 111 is bent inward. At this time, the cup pressing plate 112 is also crimped to the heat collecting plate 111 together with the flange portion 120 a of the holder 120, and the thermal head 110 is assembled to the holder 120.

  Since the temperature detecting device 100 of the present embodiment can assemble the thermal head 110 to the holder 120 in this way, it is possible to greatly suppress variation in characteristics due to individual differences compared to the conventional temperature detecting device. It is. As a preparation for explaining this point, a method for assembling the thermal head to the holder 120 with a conventional temperature detection device will be explained.

  FIG. 6 is an explanatory view showing a method of assembling the thermal head to the holder 120 with a conventional temperature detection device. When the thermal head is assembled to the holder 120 with the conventional temperature detection device, as shown in FIG. 6A, first, a stainless steel sensor having a large flange portion 213a and a cylindrical body portion 213b. The storage unit 213 is placed on the heat collecting plate 111. Since the outer diameter of the flange portion 213a is formed smaller than the inner diameter of the crimping portion 111a of the heat collecting plate 111, when the sensor housing portion 213 is placed on the heat collecting plate 111, the sensor housing portion 213 is heated. The state is within the plate 111. Subsequently, the temperature sensor 114 is inserted into the body portion 213b of the cylindrical sensor storage portion 213.

  Thereafter, as shown in FIG. 6B, the filler 115 is poured into the gap between the body portion 213b of the sensor housing portion 213 and the temperature sensor 114 and left until the filler 115 is solidified (FIG. 6C). )reference). Then, after placing the holder 120 so that the flange portion 213a of the sensor storage portion 213 is pressed from above by the flange portion 120a of the holder 120, as shown in FIG. 6D, the caulking processing portion 111a of the heat collecting plate 111 is performed. The flange portion 120a of the holder 120 is crimped to the heat collecting plate 111 so as to be bent inward. At this time, the flange portion 213 a of the sensor storage portion 213 is also crimped to the heat collecting plate 111.

  As described above, the conventional temperature detection device in which the thermal head is assembled to the holder 120 has a large variation in characteristics due to individual differences for the following reason. FIG. 7 shows one of the reasons why variations in the characteristics of the thermal head are likely to occur in the conventional temperature detection device. That is, in the conventional temperature detection device, after the filler 115 poured into the body portion 213b is solidified (see FIG. 6C), the sensor storage portion 213 is caulked to the heat collecting plate 111 together with the holder 120 (see FIG. 6). 6 (d)), the heat collecting plate 111 is adhered to the sensor storage portion 213 by the adhesive force of the filler 115. As shown in FIG. 7A, the heat collecting plate 111 is bonded only to the body portion 213 b of the sensor storage portion 213. For this reason, when an external force is applied to the heat collecting plate 111, the heat collecting plate 111 comes off as shown in FIG. 7B. At this time, a part of the solidified filler 115 is peeled off, and when the sensor storage part 213 is caulked to the heat collecting plate 111 together with the holder 120, the part where the filler 115 is peeled off becomes a cavity. There is. If a cavity is formed in this way, the heat from the heat collecting plate 111 is not transferred to the temperature sensor 114 at that portion, so that the temperature responsiveness is lowered.

  Alternatively, as shown in FIG. 7B, when the heat collecting plate 111 is detached, a part of the solidified filler 115 may adhere to the heat collecting plate 111. If the heat collecting plate 111 can be returned so that the filler 115 attached to the heat collecting plate 111 just fits into the recess made in the filler 115 on the sensor housing portion 213 side when the holder 120 is caulked. Good, but it's actually difficult to do that. For this reason, when the heat collecting plate 111 is fastened to the holder 120 together with the sensor storage unit 213, a part of the filler 115 attached to the heat collection plate 111 is crushed by the flange portion 213 a of the sensor storage unit 213. As a result, a slight gap is formed between the heat collecting plate 111 and the flange portion 213a, and this portion becomes a heat insulating layer, so that the heat from the heat collecting plate 111 is not easily transmitted to the temperature sensor 114 and the temperature is increased. Responsiveness will decrease.

  Of course, actually, the filler 115 oozes out from the body portion 213b of the sensor storage portion 213, and as shown in FIG. 7C, the area of the bonding portion of the filler 115 becomes large. The heat collecting plate 111 may not easily come off from the sensor storage unit 213. However, the fact that the filler 115 oozes out is nothing but that the flange portion 213 a of the sensor storage portion 213 is lifted from the heat collecting plate 111. When the filler 115 oozes out from the body 213b into the gap and a layer of the filler 115 is formed, the heat from the heat collector 111 is higher than the temperature when the heat collector 111 is in direct contact with the flange 213a. It becomes difficult to be transmitted to the sensor 114. Furthermore, since the degree to which the flange portion 213a of the sensor storage portion 213 is lifted from the heat collecting plate 111 is not constant, the size and thickness of the layer of the filler 115 formed in the gap also vary, resulting in characteristics. This causes a variation.

  In addition, in actuality, the filler 115 oozes out even if there is a difference in degree. Therefore, when the filler 115 is poured into the body portion 213b of the sensor storage portion 213, the filler 115 is discharged. Considering the oozing out, you have to pour a lot. For this reason, when the filler 115 is likely to overflow, it cannot be determined whether the cause is that the amount of the exudation to the outside is small or the bubbles are trapped.

  In order to avoid the above problems, the flange portion 213a of the sensor housing portion 213 may be press-fitted into the inner peripheral surface of the crimping portion 111a of the heat collecting plate 111 as shown in FIG. Conceivable. By doing so, the heat collecting plate 111 does not fall off from the sensor storage portion 213, so that the above-described problem does not seem to occur. However, since the R portion (see FIG. 8A) can always be formed where the caulking processing portion 111a rises from the outer peripheral portion of the heat collecting plate 111, the R portion becomes an obstacle even if the sensor housing portion 213 is press-fitted. As a result, a gap is formed between the flange portion 213a and the heat collecting plate 111 as shown in FIG. The size of the gap greatly varies depending on the manufacturing variation of the sensor storage unit 213 and the heat collecting plate 111. For this reason, even if the sensor storage portion 213 is press-fitted into the heat collecting plate 111, it is impossible to avoid the occurrence of variation in characteristics.

  Further, even when the heat collecting plate 111 does not fall off from the sensor storage unit 213, when the sensor storage unit 213 is caulked to the heat collecting plate 111 together with the holder 120, the heat collection plate 111 is peeled off from the filler 115, A gap may be formed between the filler 115 (and the temperature sensor 114). That is, when caulking the heat collecting plate 111, as shown by the hatched arrows in FIG. 9A, the force to bend the caulking portion 111a of the heat collecting plate 111 is applied to the heat collecting plate. Then, the heat collecting plate 111 is peeled off from the filler 115 as indicated by a solid arrow in the drawing. As a result, as shown in FIG. 9B, the heat collecting plate 111 is peeled off from the filler 115, and a gap may be formed between the heat collecting plate 111 and the filler 115 (and the temperature sensor 114). When this occurs, the heat from the heat collecting plate 111 is not easily transmitted to the temperature sensor 114, and the characteristics of the temperature detection device are greatly deteriorated.

  On the other hand, in the temperature detection device 100 of the present embodiment, since the filler 115 is poured into the bottomed cup 113, there is a variation in characteristics due to the solidified filler 115 peeling off or partly peeling off. It does not occur. Moreover, in the temperature detection apparatus 100 of the present embodiment, as described above with reference to FIG. 4, when bubbles are confined together with the temperature sensor 114, this can be easily recognized. For this reason, there is no variation in characteristics due to the trapping of bubbles.

  Furthermore, as shown in FIG. 10A, the temperature detection device 100 of the present embodiment has the bottomed cup 113 slightly protruding from the cup pressing plate 112, and the heat collecting plate 111 is moved to the holder 120 and the cup pressing plate. In the stage before crimping to the plate 112, a gap G is formed between the heat collecting plate 111 and the cup pressing plate 112. For this reason, when the caulking portion 111a of the heat collecting plate 111 is caulked, as shown in FIG. 10 (b), the caulking portion 111a is tilted obliquely onto the flange portion 120a of the holder 120, The outer periphery of the heat collecting plate 111 is slightly pulled up by the crimping portion 111a. Then, in that state, caulking is stopped. As a result, as shown in FIG. 10C, the heat collecting plate 111 is caulked and stopped in a state where it is bent slightly convex toward the outside. The heat plate 111 and the bottomed cup 113 can be reliably adhered. For this reason, in the temperature detection apparatus 100 of the present embodiment, there is no gap between the heat collecting plate 111 and the bottomed cup 113 due to manufacturing variations, and variations in characteristics due to individual differences do not occur.

  Further, the caulking processing portion 111a of the heat collecting plate 111 holds the entire circumference of the holder 120 in a state where the cup pressing plate 112 is sandwiched therebetween. In addition, the cup pressing plate 112 is made of stainless steel like the heat collecting plate 111 and the holder 120. For this reason, even if it crimps and stops in the state pinched | interposed between the crimping process part 111a and the holder 120 of the heat collecting plate 111, the cup press plate 112 is not stretched (what is called settling). As a result, caulking can be firmly and airtightly stopped, so that even if the temperature detecting device 100 is used for a long period of time, oil smoke or boiled juice enters from the caulking portion and causes deterioration of characteristics. Nor. As described above, in the temperature detection device 100 according to the present embodiment, various causes that have caused variations in characteristics in the conventional temperature detection device are eliminated, so that variations in characteristics due to individual differences are significantly suppressed. Is possible.

  Next, the temperature responsiveness of the temperature detection apparatus 100 of the present embodiment will be described. As described above, in the temperature detection device 100 of the present embodiment, the heat collecting plate 111 that is in contact with the bottom of the cooking container is made of stainless steel, and this is the same as the conventional temperature detection device. For this reason, regarding temperature responsiveness, there is a concern that the temperature detection device 100 of the present embodiment is equivalent to the conventional temperature detection device. In addition, the temperature detection device 100 of the present embodiment has a structure in which a metal plate that forms a bottomed cup 113 is added between the heat collecting plate 111 and the temperature sensor 114 with respect to the conventional temperature detection device. It has become. Therefore, the temperature detection device 100 of the present embodiment may further have a lower temperature response than the conventional temperature detection device. Therefore, the temperature responsiveness of the temperature detecting device 100 of this embodiment is compared with the temperature responsiveness of the conventional temperature detecting device by measuring the temperature change when pressed against an aluminum plate at a constant temperature (144 ° C.). did.

  FIG. 11 is an explanatory diagram showing the results of actually measuring the temperature responsiveness of the temperature detection device 100 of the present embodiment and the conventional temperature detection device. FIG. 11A shows the measurement result. The temperature change indicated by the solid line in the figure represents the measurement result of the temperature detection apparatus 100 of the present embodiment, and the temperature change indicated by the broken line in the figure represents the measurement result of the conventional temperature detection apparatus. . For reference, temperature responsiveness was also measured for a temperature detecting device including an integrated thermal head 310 formed by cutting out brass. In the figure, the measurement result of the temperature detection device of the reference example by cutting out brass is indicated by a one-dot chain line. Brass is known as a metal material having excellent temperature response. For convenience of understanding, FIGS. 11B to 11D are cross-sectional views of the thermal head for each of the present embodiment, the conventional example, and the temperature detecting device cited as a reference.

  As shown in the actual measurement result of FIG. 11A, the temperature detection device 100 of the present embodiment shown by the solid line has a greatly improved temperature responsiveness compared to the conventional temperature detection device shown by the broken line. . Furthermore, the temperature responsiveness of the one-dot chain line given as a reference shows excellent temperature responsiveness almost inferior. Although the heat collecting plate 111 is made of stainless steel, it is considered that the temperature detection device 100 of this embodiment exhibits such excellent temperature response for the following reason.

  FIG. 12 is an explanatory diagram showing the reason why the temperature detection device 100 of this embodiment exhibits excellent temperature responsiveness. FIG. 12 conceptually shows how heat is transmitted to the temperature sensor 114 in each case of the temperature detection device 100 of the present embodiment and the conventional temperature detection device. First, the case of a conventional temperature detection device will be described with reference to FIG. As described above, in the conventional temperature detection device, the heat collecting plate 111 and the sensor storage portion 213 are both made of stainless steel. Since stainless steel has low thermal conductivity, it takes time for the heat to be transferred to the body 213b of the sensor housing 213 even when the heat collecting plate 111 is heated. For this reason, even if the heat collecting plate 111 comes into contact with the bottom of the cooking container, the heat of the cooking container is not easily transmitted to the body 213b of the sensor storage unit 213, and until the body 213b reaches a high temperature. Heat is transmitted to the temperature sensor 114 only from the heat collecting plate 111 side. The broken-line arrows shown in FIG. 12B conceptually show how heat is transmitted to the temperature sensor 114 exclusively from the heat collecting plate 111 side.

  On the other hand, in the temperature detection device 100 of the present embodiment, the bottomed cup 113 is formed of a metal material mainly composed of copper or aluminum. Since the metal material mainly composed of copper or aluminum has high thermal conductivity, when the heat collecting plate 111 comes into contact with the bottom of the cooking container, the heat of the cooking container is immediately transmitted to the entire bottomed cup 113, and the bottomed The body 113b of the cup 113 is also hot. For this reason, since heat is transmitted to the temperature sensor 114 not only from the heat collecting plate 111 side but also from the body 113b side of the bottomed cup 113, the heat of the cooking container can be quickly transmitted to the temperature sensor 114. it can. The broken-line arrows shown in FIG. 12A conceptually show how heat is transmitted to the temperature sensor 114 not only from the heat collecting plate 111 side but also from the body 113b side of the bottomed cup 113. ing. As described above, in the temperature detection device 100 according to the present embodiment, the bottomed cup 113 formed of a metal material having good thermal conductivity is interposed between the heat collecting plate 111 and the temperature sensor 114, thereby collecting from the cooking container. The heat that has flowed into the hot plate 111 is quickly guided to the side of the temperature sensor 114, and the temperature sensor 114 is also heated from the side. As a result, the temperature responsiveness can be greatly improved.

  In addition, the temperature detection device 100 of the present embodiment can be formed by crimping the cup pressing plate 112 together with the holder 120 with the heat collecting plate 111 in a state where the bottomed cup 113 is pressed with the cup pressing plate 112. it can. For this reason, it can be easily manufactured as in the conventional temperature detection device. In addition, the heat collecting plate 111 that abuts the cooking container can be formed of stainless steel as in the case of the conventional temperature detection device, so that sufficient durability against wear and scraping due to the bottom of the cooking container is ensured. can do. For the reasons as described above, the temperature detection apparatus 100 of the present embodiment is free from variations due to individual differences, has excellent temperature responsiveness, is easy to manufacture, and has a thermal head 110 with excellent durability. 100.

  The temperature detection device 100 of the present embodiment 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.

1 ... Gas stove, 2 ... Top plate, 3 ... Gotoku, 4 ... Opening for burner,
10 ... a stove burner, 10a ... an air supply passage, 11 ... a burner body,
12 ... Mixing tube, 13 ... Burner head, 100 ... Temperature detector,
110 ... thermal head, 111 ... heat collecting plate, 111a ... caulking part,
112 ... Cup pressing plate, 112a ... Opening, 113 ... Bottomed cup,
113a ... convex part, 113b ... trunk | drum, 114 ... temperature sensor,
114a ... Lead wire, 115 ... Filler, 120 ... Holder,
120a ... Flange part 121 ... Coil spring 122 ... Spring receiver
123 ... Boiled soup cover, 130 ... Support pipe, 213 ... Sensor housing,
213a ... flange part, 213b ... trunk part, 310 ... thermal head.

Claims (4)

In the temperature detection device that is provided in the stove burner and detects the temperature of the cooking container placed on Gotoku,
A support pipe attached upward from the stove burner;
A holder attached to the support pipe in a manner movable in the vertical direction;
A thermal head attached to the upper end of the holder;
A coil spring for urging the holder upward,
The thermal head is
A bottomed cup made of metal mainly composed of at least one of copper or aluminum having a convex portion formed on the outer periphery of the bottom;
A temperature sensor housed together with a filler in the bottomed cup;
A cup pressing plate which is formed in a circular shape having an opening in the center, and holds the convex portion of the bottomed cup at the opening;
A temperature detection device comprising: a heat collecting plate made of an iron alloy having an outer diameter larger than that of the cup pressing portion and crimping the outer periphery of the cup pressing portion to crimp the cup pressing portion. The temperature detection device according to claim 1,
The holder has a circular flange at the upper end,
The temperature detecting device, wherein the flange portion of the holder is crimped to the heat collecting plate together with the cup pressing plate. In the temperature detection device according to claim 1 or 2,
The temperature detection device, wherein the holder and the cup pressing plate are made of an iron alloy material. In the temperature detection device according to any one of claims 1 to 3,
The portion where the cup pressing plate presses the convex portion of the bottomed cup is formed in a concave shape,
The temperature of the bottomed cup and the side of the cup pressing plate facing the heat collecting plate is such that the bottomed cup protrudes to the heat collecting plate side of the cup pressing plate. Detection device.

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