JP2006234370A - Temperature detector for stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature detector for a stove made compact while enhancing the detection precision of a heated temperature and durability. <P>SOLUTION: The temperature detector for the stove is constituted such that: a cylindrical support body 2 that supports an abutting body 1 abutting on the bottom of a heated body place on a placing part at an upper end is arranged in a ring-shaped heating means that heats the heated body placed on the placing part so as to be liftable and returnable to an upper side so that the bottom of the heated body placed on the placing part is pressed down accompanied by the abutment of the abutting body 1 to the bottom; and a temperature detecting means 4 that detects the temperature of the abutting body 1 is arranged in the temperature detector. An overhung part 2a that is overhung in the radial direction is formed at the upper end of the cylindrical support body 2, the abutting body 1 is formed into a board shape, and the board-shaped abutting body 1 is supported on the overhung part 2a of the cylindrical support body 2 in a state that a plate-shaped insulating member 7 is interposed between the abutting body and the overhung pat 2a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention provides an upper end portion of an abutting body that abuts against the bottom of the object to be heated placed on the placement part inside the annular heating means for heating the object to be heated placed on the placement part. The cylindrical support that is supported on the upper and lower portions is movable up and down and urged to return upward so that the bottom of the object to be heated placed on the placement portion is pushed down as it comes into contact with the contact body. Arranged in the state,
The present invention relates to a temperature detecting device for a stove provided with temperature detecting means for detecting the temperature of the contact body.

Such a stove temperature detection device (hereinafter sometimes simply referred to as a temperature detection device) is a stove provided with an annular heating means such as a gas burner, and is placed on a mounting portion such as a virtues as a heating means. It is used to detect the temperature of the bottom of an object to be heated such as a pan heated (hereinafter sometimes simply referred to as the temperature to be heated).
The temperature detecting device includes a cylindrical support body that supports the contact body at the upper end so that the contact body can be brought into contact with the bottom of the object to be heated placed on the placement section. The bottom of the object to be heated placed on the placement part is disposed so as to be able to be raised and lowered inside the heating means in a state of being returned and biased upward so as to be pushed down as it comes into contact with the contact body. The temperature of the contact body is detected as a heated temperature by the temperature detecting means.

  In such a temperature detection device, conventionally, as shown in FIG. 12, the contact body 1 is fitted into the upper end portion of the cylindrical support body 2 so that the outer periphery of the cylindrical support body 2 is surrounded. A large-diameter heat insulating cylinder 41 was attached (for example, see Patent Document 1).

That is, as described above, the contact body 1 is provided in the upper end portion of the cylindrical support body 2 so as to be fitted inside, and the contact body 1 and the cylindrical support body 2 are in contact with each other. Heat conduction is performed well between the contact body 1 and the cylindrical support body 2.
And the cylindrical support body 2 arrange | positioned inside the cyclic | annular heating means (illustration omitted) is easy to receive to the influence of the heat from a heating means, and in that way, the cylindrical support body 2 is the heat from a heating means. When the temperature rises due to the influence of the contact body 1, the contact body 1 having good heat conduction from the cylindrical support body 2 is easily heated by the heat conduction from the tubular support body 2, and the contact body 1 and the heated body are heated. Since the temperature difference from an object (not shown) is likely to increase, the detection accuracy is deteriorated when the temperature detection means 4 detects the temperature to be heated of the object to be heated. Therefore, as described above, the heat insulating cylinder 41 is provided on the cylindrical support body 2 to suppress the temperature rise of the cylindrical support body 2 due to the heat from the heating means, thereby suppressing the detection accuracy of the heated temperature from being lowered. I am trying to do it.

JP 2000-283468 A

  Therefore, conventionally, since the large-diameter heat insulating cylinder is attached to the cylindrical support so as to surround the outer peripheral portion thereof, there is a problem that the temperature detecting device is enlarged.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a temperature detection device for a stove that can be made compact while improving detection accuracy and durability of a temperature to be heated. is there.

The temperature detection device for a stove according to the present invention is in contact with the bottom of the object to be heated placed on the placement part, inside the annular heating means for heating the object to be heated placed on the placement part. The cylindrical support that supports the abutting body to be supported on the upper end can freely move up and down so that the bottom of the object to be heated placed on the placing section is pushed down as it abuts on the abutting body. And it is disposed in a state where it is biased back upward,
A temperature detecting means for detecting the temperature of the contact body is provided,
The first characteristic configuration is provided with an overhanging portion protruding in the radial direction at the upper end of the cylindrical support,
The contact body is configured in a disk shape,
The disc-shaped contact body is supported on the projecting portion of the cylindrical support body with a plate-like heat insulating member interposed between the projecting portion and the projecting portion.

That is, the abutting body is configured in a disk shape, and the disk-shaped abutting body is supported in a state where a plate-like heat insulating member is interposed between the protruding portion of the cylindrical support body and the protruding portion. And since the heat insulation from the cylindrical support body to the contact body is suppressed by the heat insulating member, the temperature fluctuation of the contact body due to the heat conduction from the cylindrical support body is suppressed.
And since the heat conduction from the cylindrical support body to the contact body is suppressed in this way, the temperature fluctuation of the contact body due to the heat conduction from the cylindrical support body is suppressed. Even if the temperature rises due to the heat from the heating means, the temperature variation of the contact body due to heat conduction from the cylindrical support is suppressed, and it is possible to improve the detection accuracy of the temperature to be heated. Become.
And since it is the structure which heat-insulates between a cylindrical support body and a contact body, it is not necessary to suppress the temperature rise of a cylindrical support body by the heat | fever from a heating means. In order to suppress this, it is not necessary to provide the above-mentioned conventional heat-insulating cylinder on the cylindrical support, so that it is possible to suppress an increase in diameter of the cylindrical support.

In addition, the plate-like contact body is placed on the placing portion by supporting the plate-like contact body on the projecting portion of the cylindrical support body with a plate-like heat insulating member interposed therebetween. Since the load applied to the plate-like heat insulating member when the bottom of the heated object hits the contact body can be received in a wide range of the plate surface of the heat insulating member, the heat insulating member It is possible to reduce the applied load per unit area.
Therefore, it is possible to suppress the heat insulating member from being cracked or locally thinned, and it is possible to maintain the ability of the heat insulating member to suppress heat conduction from the cylindrical support body to the contact body. Therefore, it becomes possible to suppress that the detection accuracy of the to-be-heated temperature falls with the passage of time due to the decrease in the heat conduction suppressing ability of the heat insulating member, and it becomes possible to improve the durability.
In short, it has become possible to provide a temperature detection device for a stove that can be made compact while improving the detection accuracy and durability of the temperature to be heated.

In addition to the first feature configuration, the second feature configuration is
The projecting portion is provided at the upper end of the cylindrical support body in a state of projecting radially inward, and a contact body insertion hole for inserting the contact body is formed at the projecting portion. And
The abutting body has a disk-shaped portion having a larger diameter than the abutting body insertion hole, and a rod-shaped insertion extending downward from the center or substantially the center of the lower surface of the disk-shaped portion and having a smaller diameter than the abutting body insertion hole. And comprising
In the state in which the contact body has the annular heat insulating member interposed between the disk-shaped portion and the projecting portion of the cylindrical support body, the rod-shaped insertion portion is in contact with the cylindrical support body. Provided in a non-contact state in the body insertion hole,
A retaining member for retaining the contact body is provided at a protruding portion from the contact body insertion hole in the rod-shaped insertion portion in a state in which heat conduction with the projecting portion is suppressed. It is characterized by.

That is, the cylindrical support body in a state where the rod-shaped insertion portion is inserted into the contact body insertion hole of the cylindrical support body from the upper side in a non-contact state with the rod-shaped insertion section inserted into the rod-shaped insertion section. It is supported at the upper end of the.
Subsequently, when a retaining member is provided at a protruding portion from the contact body insertion hole in the rod-shaped insertion portion, the contact body is supported by the upper end portion of the cylindrical support body in a state of being retained by the retaining member. .
That is, by providing the retaining member as described above, the contact body is supported by the upper end portion of the cylindrical support body in a state of being retained by the retaining member, and without using an adhesive, This makes it possible to assemble the abutment body to the cylindrical support body in a state that sufficiently prevents relative movement with the cylindrical support body.

  Then, the rod-shaped insertion portion of the contact body is inserted in a non-contact state into the contact body insertion hole of the cylindrical support body, and the retaining member is projected to the protruding portion from the contact body insertion hole in the rod-shaped insertion portion. Therefore, it is possible to suppress the heat conduction between the contact body and the cylindrical support.

That is, the contact body needs to be assembled to the cylindrical support body in a state where heat conduction with the cylindrical support body is suppressed and relative movement with respect to the cylindrical support body is prevented. With this configuration, the contact body can be assembled to the cylindrical support body in a state in which relative movement with the cylindrical support body is sufficiently prevented, so that heat from the cylindrical support body to the contact body can be obtained. The ability to suppress conduction can be maintained for a longer period of time, and it is possible to further suppress the decrease in detection accuracy of the temperature to be heated over time, thereby further improving durability. Become.
Further, as described above, the contact body can be assembled to the cylindrical support body by a simple operation of simply providing the retaining member on the rod-shaped insertion portion of the contact body without using an adhesive. Therefore, it is possible to reduce the manufacturing cost of the temperature detection device and to reduce the cost of the temperature detection device.
In short, it has become possible to further improve the durability of the temperature detecting device for the stove, and to reduce the cost of the temperature detecting device for the stove.

The third feature configuration is in addition to the second feature configuration,
A state in which the retaining member has an annular heat insulating intermediate member interposed between it and the projecting portion, is prevented from moving away from the disk-shaped portion, and is in a non-contact state with the cylindrical support. Thus, the rod-shaped insertion portion of the contact body is fitted on a protruding portion from the contact body insertion hole.

That is, a contact body in which an annular heat insulating member is inserted into the rod-shaped insertion portion is supported on the upper end portion of the cylindrical support body in a state where the rod-shaped insertion portion is inserted into the contact body insertion hole of the tubular support body from above. Subsequently, an annular intermediate member is externally fitted to the protruding portion from the contact body insertion hole in the rod-shaped insertion portion, and a retaining member is further externally fitted, and the retaining member is attached to the contact body. It pushes in the direction approaching the disk-shaped part of an abutting body so that it may be in the state which pinches | interposes a heat insulation member, an overhang | projection part, and an intermediate member with a disk-shaped part.
Then, the retaining member is prevented from moving in a direction away from the disk-shaped portion of the contact body in the state of being fitted around the rod-shaped insertion portion of the contact body. It becomes possible to hold the heat insulating member, the overhanging portion, and the intermediate member with the disc-shaped portion, and hold the rod-shaped insertion portion of the contact body, and the contact body is prevented from moving relative to the cylindrical support body. In this state, it is assembled to the cylindrical support.
Further, by attaching an annular heat insulating intermediate member between the projecting portion and the projecting portion, and by fitting the retaining member to the rod-shaped insertion portion of the contact body in a non-contact state with the cylindrical support body, The retaining member is provided on the protruding part from the abutment body insertion hole in the rod-shaped insertion part in a state where heat conduction between the projecting part and the protruding part is suppressed, so the retaining member is made of metal with high thermal conductivity, etc. Even if it is made, it is possible to make into a heat insulation state between a contact body and a cylindrical support body.

  In other words, the contact body is assembled to the cylindrical support body as described above by a simple operation of simply pushing the retaining member on the rod-shaped insertion portion of the contact body in the direction approaching the disk-shaped portion. Therefore, the manufacturing cost of the temperature detection device can be further reduced.

  Therefore, it has become possible to further reduce the cost of the temperature detecting device for the stove.

In addition to the third feature configuration, the fourth feature configuration is
The heat insulating member and the intermediate member are manufactured in the same shape with the same material.

  That is, since the heat insulating member and the intermediate member are manufactured in the same shape with the same material, the heat insulating member and the intermediate member can be used as a common part.

And by making a heat insulation member and an intermediate member into a common part, the parts cost of these heat insulation members and an intermediate member can be reduced, and since simplification of an assembly operation can be aimed at, manufacturing cost can be reduced. Further reduction is possible.
Accordingly, it has become possible to further reduce the cost of the temperature detecting device for the stove.

In addition to the third or fourth feature configuration, the fifth feature configuration includes:
The heat insulating member and the intermediate member are made of a fluororesin.

That is, the abutting body is supported by the tubular support body in a heat-insulated state and prevented from relative movement with the tubular support body by the fluororesin heat insulating member and the intermediate member.
That is, by using a fluororesin as the heat insulating member and the intermediate member, the fluororesin has sufficient heat resistance with respect to the temperature of the heated object heated by the heating means, and is resistant to impact. Since it is strong, it is possible to prevent damage to the heat insulating member and the intermediate member due to an impact when the bottom of the object to be heated comes into contact with the contact body during use, and durability can be improved.
In addition, since fluororesin is superior in heat insulating properties compared to heat insulating materials such as ceramics, heat conduction from the cylindrical support to the contact body can be achieved by using fluororesins as the heat insulating member and intermediate member. Is further suppressed, and the detection accuracy of the temperature to be heated can be further improved.
Therefore, it becomes possible to further improve the detection accuracy and durability of the temperature to be heated of the temperature detection device for the stove.

In addition to any of the first to fifth feature configurations described above, the sixth feature configuration is
The cylindrical support body is provided with a cylindrical main body portion and the protruding portion at the upper end to support the contact body, and is mounted in a fitted state on the upper end side of the main body portion. It is characterized by comprising a support portion.

  In other words, the cylindrical support body is provided with a cylindrical main body portion and the protruding portion at the upper end to support the contact body, and is mounted in a fitted state on the upper end side of the main body portion. Since the main body part and the contact body support part are separated from each other, the contact body is first assembled to the contact body support part in a state of being insulated by the heat insulating member, The temperature detection device can be manufactured by the procedure of mounting the contact body support portion assembled with the contact body to the main body portion in a fitted state.

In other words, the length of the contact body support portion can be shortened by configuring the cylindrical support body with the main body portion and the contact body support portion which are separate from each other as described above.
Then, by assembling the contact body with the contact body support portion having a short length, the assembly work can be facilitated.
In other words, the work of fixing the contact body, the heat insulating member, etc. to the cylindrical support may need to be performed through the cylinder of the cylindrical support. In such a case, the cylindrical support Since the main body and the contact body support portion are configured separately from each other, the length of the contact body support portion can be shortened. Thus, it is possible to easily perform the operation of fixing the contact body, the heat insulating member, and the like to the cylindrical support through the inside of the cylinder.
Accordingly, it is possible to further reduce the manufacturing cost of the temperature detection device, and thus it is possible to further reduce the cost of the temperature detection device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the temperature detection device includes a cylindrical cylindrical support 2 that supports an upper end of a contact body 1 that makes contact with the bottom of an object to be heated, and the cylindrical support 2. A cylindrical guide tube 3 that is supported so as to be movable up and down, a thermistor 4 as temperature detecting means for detecting the temperature of the contact body 1, a coil spring 5 that returns and urges the cylindrical support body 2 upward, and this temperature detection device Is provided with a holder 6 attached to a burner B1 (see FIG. 4) as an annular heating means.

  And in this invention, as shown in FIG. 1 thru | or 3, in the upper end of the said cylindrical support body 2, the overhang | projection part 2a projected over the radial direction is provided over the perimeter of the circumferential direction of the cylindrical support body 2, The contact body 1 is formed in a disk shape, and the disk-shaped contact body 1 is disposed on the projecting portion 2a of the cylindrical support 2 with a plate-like heat insulating member 7 interposed between the projecting portion 2a and the projecting portion 2a. It is supported in the state of letting it.

In this embodiment, the projecting portion 2a is provided at the upper end of the cylindrical support body 2 so as to project radially inward, and the contact body 1 is inserted at the projecting portion 2a. The contact body insertion hole 2b is formed.
Furthermore, the cylindrical support body 2 is provided with a cylindrical main body 2A and a protruding part 2a at the upper end to support the abutting body 1 and mounted in a fitted state on the upper end side of the main body 2A. And an abutting body support portion 2B.

  The contact body 1 extends downward from the center of the lower surface of the disk-shaped portion 1A having a larger diameter than the contact body insertion hole 2b and the disk-shaped portion 1A, and more than the contact body insertion hole 2b. The abutting body 1 is configured in a disk shape with a cylindrical insertion portion. The cylindrical insertion portion 1B is a small-diameter rod-shaped insertion portion.

And the cylindrical insertion part 1B is made into a cylindrical support body in the state which interposed the said heat insulating member 7 between the contact body 1 between the disk-shaped part 1A and the overhang | projection part 2a of the cylindrical support body 2. 2 is inserted into the contact body insertion hole 2b in a non-contact state, and a retaining member 8 for retaining the contact body 1 is provided at a protruding portion from the contact body insertion hole 2b in the cylindrical insertion portion 1B. It is provided in a state in which heat conduction with the overhanging portion 2a is suppressed.
Further, an annular heat insulating intermediate member 9 is interposed between the retaining member 8 and the projecting portion 2a, and the movement in the direction away from the disc-shaped portion 1A is prevented, and the cylindrical support body 2 is not contacted. In such a state, it is assumed that the cylindrical insertion portion 1B of the contact body 1 is externally fitted to a protruding portion from the contact body insertion hole 2b.

  Further, the annular intermediate member 9 is formed into a shape that can be fitted between the outer peripheral surface of the cylindrical insertion portion 1 </ b> B of the contact body 1 and the inner peripheral surface of the cylindrical support member 2. Thus, the contact body 1 is configured to be prevented from moving in the radial direction with respect to the cylindrical support body 2.

Hereinafter, description is added about each part which comprises a temperature detection apparatus.
As shown in FIGS. 1 to 3, the contact body 1 is made of a metal excellent in heat conduction and has a shape including the disk-shaped portion 1 </ b> A and the cylindrical insertion portion 1 </ b> B. Incidentally, in this embodiment, the contact body 1 is formed by brass plating with a ratio of copper to zinc of 7: 3 and then plated with chromium.

The main body portion 2A constituting the cylindrical support body 2 is formed in a two-stage cylindrical shape having a large diameter portion on the upper side, and the outer diameter of the large diameter portion is substantially the same as the disk-shaped portion 1A of the contact body 1. The same diameter is formed.
The abutting body support portion 2B constituting the cylindrical support body 2 is formed in a cylindrical shape having the protruding portion 2a at the upper end and the flange portion 2c at the lower end.
The outer diameter of the large-diameter portion of the main body portion 2A and the inner diameter of the contact body support portion 2B can be made substantially the same diameter, and the contact body support portion 2B can be externally fitted to the upper end portion of the large diameter portion of the main body portion 2A. It is configured as follows.
The main body 2A and the contact body support 2B are both made of stainless steel (SUS304).

  As shown in FIGS. 1 and 2, the guide cylinder 3 is formed in a cylindrical shape whose outer diameter is smaller than the inner diameter of the small diameter portion of the main body 2A, and the coil spring 5 is received at the upper end and the cylindrical shape is formed. A hook-shaped portion 3a that can be received by the two-step inner peripheral surface of the main body portion 2A of the support 2 is provided, and a single protrusion 3b that extends over the entire outer periphery is provided on the lower end side. The guide tube 3 is also made of stainless steel (SUS304).

That is, the outer diameter of the upper flange portion 3a of the guide tube 3 is larger than the inner diameter of the small diameter portion of the two-step inner peripheral surface of the main body 2A of the cylindrical support 2, and the inner diameter of the large diameter portion. It is formed to be smaller than that.
Then, the cylindrical support 2 positioned outside the upper end of the guide cylinder 3 has a stepped portion on the inner peripheral surface of the main body 2A of the cylindrical support 2 that is a bowl-shaped portion of the guide cylinder 3. The guide cylinder 3 is configured to be guided so as to be movable up and down in a state where the upward movement is prevented by contacting the 3a.

  The holder 6 is formed in a shape having flat plate portions 6a and 6b at both ends in the circumferential direction of a semicircular plate portion 6c bent in a semicircular shape, and both the flat plate portions 6a and 6b and the semicircle are formed. An elongated hole 6d is provided in which the protrusion 3b of the guide tube 3 can be fitted in a state extending over the plate-like plate 6c. Furthermore, a locking piece 6e that is locked in a locking hole 33a formed in the sensor mounting portion 33 (see FIG. 5) of the temperature detection device is provided at the tip of one flat plate portion 6a, and the other flat plate portion 6b. Is provided with a bolt insertion hole 6f for inserting the bolt of the screw type fastening means 10.

As shown in FIGS. 1 to 3, the annular retaining member 8 has a plurality of (six in this embodiment) protrusions 8a distributed on the inner periphery thereof at equal intervals in the circumferential direction. The retaining member 8 is formed of a material having elasticity, such as stainless steel for springs, in a shape provided in an inclined shape facing the same side in the thickness direction.
The outer diameter of the annular retaining member 8 is set to be smaller than the inner diameter of the main body 2A of the cylindrical support 2, and the diameter of the circle along the tips of the plurality of protrusions 8a It is set to be slightly smaller than the outer diameter of the cylindrical insertion portion 1B of the body 1.

The inner diameter of the annular intermediate member 9 is the same as the outer diameter of the cylindrical insertion portion 1B of the contact body 1, and the outer diameter is the same as the inner diameter of the contact body support portion 2B of the cylindrical support body 2. The annular intermediate member 9 can be fitted between the outer peripheral surface of the cylindrical insertion portion 1B of the contact body 1 and the inner peripheral surface of the contact body support portion 2B of the cylindrical support body 2. It is configured as follows.
The intermediate member 9 is made of the same material as the heat insulating member 7 and has the same shape as the heat insulating member 7.
Incidentally, in this embodiment, the heat insulation member 7 and the intermediate member 9 are made of polytetrafluoroethylene (PTFE) resin.

Next, a method for fabricating the temperature detection device by assembling the above-described members will be described.
First, by filling the thermistor 4 with the heat resistant resin 11 in a state where the thermistor 4 is housed in the cylindrical insertion portion 1B of the contact body 1, the temperature of the thermistor 4 can be detected by the contact body 1. Provide. In the figure, reference numeral 12 denotes a lead wire of the thermistor 4, and the lead wire 12 is covered with a heat-resistant coating material.

Subsequently, the abutment body 1 in which the heat insulating member 7 is externally fitted to the cylindrical insertion portion 1B, and the cylindrical insertion portion 1B from the upper side to the abutment body insertion hole 2b of the abutment body support portion 2B. In the state of being inserted into the contact state, the contact body support portion 2B is supported.
Subsequently, the intermediate member 9 is externally fitted to a protruding portion from the contact body insertion hole 2b in the cylindrical insertion portion 1B, and the protrusion 8a of the retaining member 8 is opposite to the disc-shaped portion 1A side. Fit externally in a posture facing to the side.

As described above, when the retaining member 8 is externally fitted to the protruding portion from the contact body insertion hole 2b in the cylindrical insertion portion 1B, the plurality of protrusions 8a abut against the outer peripheral surface of the cylindrical insertion portion 1B due to its elasticity. The retaining member 8 fitted on the cylindrical insertion portion 1B of the contact body 1 is allowed to move in a direction approaching the disc-like portion 1A, but is moved in a direction away from the disc-like portion 1A. Be blocked.
Then, the retaining member 8 externally fitted to the cylindrical insertion portion 1B of the contact body 1 is moved in a direction approaching the disc-shaped portion 1A of the contact body 1, and the retaining member 8 and the contact body 1 are moved. When the heat insulating member 7, the overhanging portion 2a, and the intermediate member 9 are sandwiched by the disk-shaped portion 1A, the heat transfer between the contact body 1 and the contact body support portion 2B is the heat insulating member 7 and the intermediate member 9 And is attached to the contact body support portion 2B in a state where relative movement with respect to the contact body support portion 2B is prevented.

Subsequently, the main body 2A of the cylindrical support 2 is positioned at the upper end of the guide tube 3, and the coil spring 5 is placed on the flange 3a at the upper end of the guide tube 3 inside the main body 2A. Arrange in the state.
Then, the contact body support portion 2B assembled with the contact body 1 as described above is externally fitted to the upper end side of the main body portion 2A located at the upper end portion of the guide tube 3, and in this state, the contact body By caulking the support portion 2B and the main body portion 2A, the contact body support portion 2B and the main body portion 2A are assembled together.
Thus, in a state where the abutment support 2B is assembled to the main body 2A provided at the upper end of the guide tube 3, the coil spring 5 is located between the hook-shaped portion 3a of the guide tube 3 and the retaining member 8. Is held in a contracted state.
That is, the cylindrical support 2 that supports the contact body 1 at the upper end is supported by the guide cylinder 3 so as to be movable up and down while being urged upward by the coil spring 5.

  As described above, the retaining member 8 and the disc-shaped portion 1A of the contact body 1 are sandwiched between the heat insulating member 7, the overhanging portion 2a, and the intermediate member 9 so that the cylindrical insertion portion of the contact body 1 is inserted. By fitting externally to 1B, the relative movement of the contact body 1 with respect to the cylindrical support body 2 is prevented, and the outer peripheral surface of the rod-shaped insertion portion 1B of the contact body 1 and the contact body support of the cylindrical support body 2 are supported. The relative movement of the contact body 1 in the radial direction with respect to the cylindrical support body 2 is prevented by the intermediate member 9 fitted between the inner peripheral surface of the portion 2B. The contact body 1 can be assembled to the cylindrical support body 2 in a state in which relative movement between the contact body 1 and the cylindrical support body 2 is more reliably prevented.

  The cylindrical insertion portion 1B of the contact body 1 is not in contact with the contact body insertion hole 2b, and the retaining member 8 is externally fitted to the cylindrical insertion portion 1B of the contact body 1 as described above. In this state, the retaining member 8 is in a non-contact state with both the main body 2A and the contact body support portion 2B of the cylindrical support body 2, so that the contact body 1 is in contact with the tubular support body 2 with heat. The conduction is supported by the upper end of the cylindrical support 2 in a state where conduction is suppressed by the heat insulating member 7 and the intermediate member 9 and relative movement with respect to the cylindrical support 2 is prevented.

That is, the thermal conductivity of the polytetrafluoroethylene resin is extremely smaller than that of the brass forming the contact body 1 and the stainless steel forming the cylindrical support body 2. By using ethylene resin, heat conduction between the contact body 1 and the cylindrical support body 2 is sufficiently suppressed, and the space between the contact body 1 and the cylindrical support body 2 is insulative. Can do.
Incidentally, the thermal conductivity of the polytetrafluoroethylene resin forming the heat insulating member 7 and the intermediate member 9 is about 0.35 (W / m · K). On the other hand, the thermal conductivity of brass forming the contact body 1 and the thermal conductivity of stainless steel (SUS304) forming the cylindrical support body 2 are about 117 (W / m · K) and about 20 (W / M, respectively). m · K).

Next, a gas stove using the temperature detection device S configured as described above will be described.
As shown in FIG. 4, the gas stove includes three burners B1, B2, and B3 as an annular heating means and a grill portion (not shown), and is configured as a built-in type.
As the three burners B1, B2 and B3, a standard burner B1, a high thermal burner B2 having a larger combustion amount than the standard burner B1, and a small burner B3 having a smaller combustion amount than the standard burner B1 are provided. Yes, the temperature detection device S is provided for the standard burner B1.

The upper surface of the gas stove is covered with a glass top plate 21, and a grill exhaust port 22 for exhausting combustion exhaust gas from the grill portion is formed behind the upper surface.
On the top plate 21, the virtues 23 as a placing portion for placing a heated object such as a pan are detachably placed and supported so as to correspond to the standard burner B 1, the high thermal burner B 2 and the small burner B 3. It is comprised so that it may do.

The three burners B1, B2, and B3 are configured in the same manner. However, in this embodiment, since the temperature detection device S is provided for the standard burner B1, hereinafter, the standard burner B1 is targeted. The configuration will be described.
As shown in FIGS. 5 and 6, the standard burner B <b> 1 is configured as an external flame type having an annular burner body 25 in which a plurality of flame openings 24 are provided at intervals on the outer peripheral portion. In addition to the burner main body 25, the external flame type standard burner B1 includes an annular cap cover 26 that is detachably mounted and supported on the upper portion of the burner main body 25, and gas fuel and air on the burner main body 25. A mixed pipe 27 for supplying the mixed gas, a gas nozzle 28 for supplying gaseous fuel to the gas fuel receiving port 27a of the mixed pipe 27, a spark plug 29, and the like are provided. In this embodiment, since the temperature detection device S is not provided for the large thermal power burner B2 and the small burner B3, the cap covers 26 of the large thermal power burner B2 and the small burner B3 are formed in a disc shape. However, when the temperature detection device S is provided for each of the large burner B2 and the small burner B3, the cap cover 26 is formed in an annular shape as in the case of the standard burner B1.

As shown in FIG. 5, the burner body 25 is placed and supported on an upper portion of the burner base 30 so as to cover the annular burner base 30 having an annular recess opened on the upper surface and the recess of the burner base 30. An annular burner cap 31 is provided.
Then, by placing and supporting the burner cap 31 on the burner base 30, the concave portion of the burner base 30 is closed by the burner cap 31 to form an annular mixed gas distribution chamber 32. The plurality of flame openings 24 are formed along the outer peripheral portion in a communicating state.
The burner base 30 and the mixing tube 27 are integrally formed by die casting using aluminum as a material.

  The standard burner B1 configured as described above is disposed on the lower side of the top plate 21 with the burner body 25 protruding upward from the opening formed in the top plate 21.

  As shown in FIG. 5, the temperature detection device S is in a standing posture where the contact body 1 protrudes upward from the upper end of the virtues 23 in a state where the object to be heated is not placed on the virtues 23. Thus, the holder 6 is used to support the standard burner B1 so as to be positioned substantially in the center of the opening in the center of the annular burner body 25.

That is, the sensor attachment portion 33 for attaching the temperature detection device S is attached to the standard burner B1.
Then, the holder 6 is guided in a state where the projection 3b of the guide tube 3 of the temperature detecting device S is fitted into the long hole 6d and the locking piece 6e is locked to the locking hole 33a of the sensor mounting portion 33. The temperature is detected by covering the tube 3 and inserting the bolt of the screw-type fastening means 10 into the bolt insertion hole 6f of the holder 6 and the bolt insertion hole 33b of the sensor mounting portion 33 and screwing the nut onto the bolt. The device S is supported on the standard burner B1 as described above.

  As shown in FIG. 7, when the heated object N such as a pan is placed on the virtues 23, the cylindrical support body 2 is in the state where the contact body 1 is in contact with the bottom of the heated object N. The contact body 1 is pushed down against the urging force of the coil spring 5, and the contact body 1 is brought into contact with the bottom of the object to be heated by the urging force of the coil spring 5. And the temperature of the contact body 1 which contact | abutted to the bottom part of the to-be-heated material in that way is detected by the said thermistor 4 as a to-be-heated temperature.

Hereinafter, in the temperature detection device, as described above, the contact body 1 is supported on the cylindrical support body 2 in a heat-insulated state in which heat conduction with the cylindrical support body 2 is suppressed. The result of verifying that the detection accuracy can be improved will be described.
In this verification test, the temperature of the object to be heated in the pan is measured with another temperature measuring instrument as the actual heating temperature in a state where the pot as the object to be heated containing the object to be heated is heated by the standard burner B1. At the same time, the temperature of the contact body 1 is detected by the thermistor 4, the temperature of the contact body 1 detected by the thermistor 4 (corresponding to the heated temperature) and the actual heating temperature measured by the temperature measuring instrument. The heating temperature detection accuracy was evaluated.
And the detection accuracy of the to-be-heated temperature was evaluated using water and oil as a heating target.

FIGS. 8 and 9 show changes over time in the temperature of the contact body 1 and the actual heating temperature after the standard burner B1 is ignited. FIG. 8 shows the case where the heating object is water, and FIG. This is the case with oil.
8 and 9, it can be seen that there is almost no difference between the temperature of the contact body 1 and the actual heating temperature regardless of whether the object to be heated is water or oil.

  Even if the temperature of the cylindrical support 2 is increased by the influence of the heat from the standard burner B1, the cylindrical shape of the contact body 1 is set in a heat insulating state with respect to the cylindrical support 2 by the above verification test. Since heat conduction from the support body 2 to the contact body 1 is suppressed, the temperature rise of the contact body 1 due to heat conduction from the cylindrical support body 2 is suppressed, and the temperature of the contact body 1 and the actual heating temperature are suppressed. Therefore, it was verified that the detection accuracy of the heated temperature could be improved.

[Another embodiment]
Next, another embodiment will be described.
(A) The shape of the disc-shaped contact body 1 is limited to the shape exemplified in the above-described embodiment, that is, the disc shape with the cylindrical insertion portion provided with the disc-shaped portion 1A and the cylindrical insertion portion 1B. Is not to be done.
Further, the projecting direction of the projecting portion 2a provided at the upper end of the cylindrical support 2 is not limited to the radially inward side of the cylindrical support 2 exemplified in the above embodiment.
The contact body support structure for supporting the contact body 1 and the heat insulating member 7 in a state in which relative movement is prevented with respect to the cylindrical support body 2 is a structure using the retaining member 8 as in the above embodiment. It is not limited to.

  FIG. 10 shows an example of another embodiment of the shape of the disk-shaped contact body 1 and the contact body support structure. In this example, the disk-shaped contact body 1 is the same as that of the above embodiment. Such a cylindrical insertion portion 1B is not provided. Further, the contact body 1 and the heat insulating member 7 are fixed to the projecting portion 2a of the cylindrical support body 2 using a heat-resistant adhesive (not shown).

FIG. 11 shows an example of another embodiment of the overhang direction of the overhang portion 2a and the contact body support structure. In this example, the overhang portion 2a is formed on the upper end of the cylindrical support body 2 on the outside in the radial direction. It is provided in a state of projecting to the side. Further, the contact body 1 and the heat insulating member 7 are fixed to the projecting portion 2a of the cylindrical support body 2 using a heat-resistant adhesive (not shown).
Furthermore, a rising portion 2 d that rises upward is provided on the outer peripheral portion of the overhang portion 2 a of the cylindrical support 2. Then, the annular heat insulating member 7 is configured in a shape that can be fitted between the outer peripheral surface of the cylindrical insertion portion 1B of the contact body 1 and the inner peripheral surface of the rising portion 2d of the cylindrical support 2, The heat insulating member 7 is configured to prevent the contact body 1 from moving in the radial direction with respect to the cylindrical support body 2.

  Further, the abutment body 1 is adhered to the projecting portion 2a of the cylindrical support 2 using an adhesive having heat insulation and heat resistance so that the adhesive layer functions as the heat insulation member 7. May be. Incidentally, the thickness of the adhesive layer is set to a thickness that can insulate the contact body 1 and the cylindrical support body 2 as desired.

(B) In providing the projecting portion 2a at the upper end of the cylindrical support 2, in the above-described embodiment, the case where it is provided over the entire circumference in the circumferential direction of the cylindrical support 2 is illustrated, but the cylindrical support 2 is not necessarily provided. It is not necessary to provide the entire circumference in the circumferential direction. However, in order to reduce the load per unit area applied to the plate-like heat insulating member 7, it is preferable to provide the protruding portion 2 a in a wide range in the circumferential direction of the cylindrical support 2. Further, in order to reduce the load per unit area applied to the plate-like heat insulating member 7, the amount of overhang in the radial direction of the cylindrical support 2 at the overhang portion 2a is set to the contact body 1 with the overhang portion 2a. It is preferable to make it as large as possible under the condition that it does not contact the cylindrical insertion portion 1B.

(C) In the above embodiment, the case where the cylindrical support 2 is configured by separately providing the main body portion 2A and the contact body support portion 2B is illustrated. You may comprise as.

(D) The specific configuration of the retaining member 8 is not limited to the configuration exemplified in the above embodiment. For example, a retaining ring having elasticity that can be locked to a stepped locking portion such as a concave groove formed in the cylindrical insertion portion 1B of the contact body 1 or a threaded engagement with the cylindrical insertion portion 1B of the contact body 1 Can be used.
Further, the retaining ring 8 and the nut as the retaining member 8 are made of a resin having heat insulation and heat resistance, so that the retaining member 8 is formed in a cylindrical shape without providing the intermediate member 9 provided in the above embodiment. Since it is possible to provide the protruding portion from the contact body insertion hole 2b in the shape insertion portion 1B in a state in which heat conduction with the projecting portion 2a is suppressed, the intermediate member 9 can be omitted. Become.

(E) When the heat insulating member 7 and the intermediate member 9 are made of a fluororesin, as the fluororesin, in addition to the polytetrafluoroethylene (PTFE) resin exemplified in the above embodiment, polytrichlorofluoroethylene (PCTFE) ), Fluorinated ethylene propylene copolymer (FEP), and the like.
Further, as the heat insulating material for forming the heat insulating member 7 and the intermediate member 9, in addition to the fluororesin exemplified in the above embodiment, the material having the thermal conductivity forming the contact body 1 and the cylindrical support 2 are formed. Various heat insulating materials such as ceramics and glass wool can be used under conditions lower than the material.

(F) As the temperature detecting means for detecting the temperature of the contact body 1, for example, a thermocouple can be used in addition to the thermistor 2 exemplified in the above embodiment.

(G) When the temperature detection device for a stove according to the present invention is used in a gas stove, the gas stove includes an inner flame type annular burner other than the one provided with the outer flame type annular burner B1 as in the above embodiment. It may be equipped with a burner. By the way, this internal flame type burner includes an annular burner body in which a plurality of flame openings are provided at intervals on the inner peripheral portion.
And when providing the temperature detection apparatus for stoves of this invention with respect to an internal flame type burner, in the state which surrounds the cylindrical cover body around the guide cylinder 3 and the cylindrical support body 2 of a temperature detection apparatus, It is preferable that the annular burner main body is provided so as to be positioned at the center opening of the annular burner main body so as to prevent the flame from directly hitting the guide cylinder 3 or the cylindrical support body 2 at the cover.

  Further, the temperature detection device for a stove of the present invention can be used in various stoves such as an electric stove other than the gas stove exemplified in the above embodiment. When used in an electric stove, the temperature detection device is provided in a standing posture in the opening at the center of the annular electric heater as the annular heating means.

Vertical section of temperature detecting device for stove according to an embodiment 1 is an exploded perspective view of a temperature detecting device for a stove according to an embodiment. The longitudinal cross-sectional view of the principal part of the temperature detection apparatus for stoves concerning embodiment The top view of the gas stove provided with the temperature detection apparatus for stoves concerning embodiment The longitudinal cross-sectional view of the burner provided with the temperature detection apparatus for stoves concerning embodiment The top view of the burner provided with the temperature detection apparatus for stoves concerning embodiment The longitudinal cross-sectional view of the burner provided with the temperature detection apparatus for stoves concerning embodiment The figure which shows the verification result when the heating object is water The figure which shows the verification result when the heating object is oil Longitudinal sectional view of a main part of a temperature detecting device for a stove according to another embodiment Longitudinal sectional view of a main part of a temperature detecting device for a stove according to another embodiment Longitudinal sectional view of the main part of a conventional temperature detection device for a stove

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contact body 1A Disc-shaped part 1B Rod-shaped insertion part 2 Cylindrical support body 2A Main body part 2B Contact body support part 2a Overhang | projection part 2b Contact body insertion hole 4 Temperature detection means 7 Heat insulation member 8 Retaining member 9 Intermediate member 23 Place B1 heating means

Claims (6)

A cylinder that supports, on the upper end, an abutting body that abuts against the bottom of the object to be heated placed on the placement part inside the annular heating means for heating the object to be heated placed on the placement part. In a state where the shape support body can be raised and lowered and is urged to return upward so that the bottom portion of the object to be heated placed on the placement section is pushed down as it comes into contact with the contact body. Arranged,
A temperature detecting device for a stove provided with a temperature detecting means for detecting the temperature of the contact body,
At the upper end of the cylindrical support, a projecting portion that projects in the radial direction is provided,
The contact body is configured in a disk shape,
A temperature detecting device for a stove, in which the disk-shaped contact body is supported on the projecting portion of the cylindrical support body with a plate-like heat insulating member interposed between the plate-shaped contact body and the projecting portion. The projecting portion is provided at the upper end of the cylindrical support body in a state of projecting radially inward, and a contact body insertion hole for inserting the contact body is formed at the projecting portion. And
The abutting body has a disk-shaped portion having a larger diameter than the abutting body insertion hole, and a rod-shaped insertion extending downward from the center or substantially the center of the lower surface of the disk-shaped portion and having a smaller diameter than the abutting body insertion hole. And comprising
In the state in which the contact body has the annular heat insulating member interposed between the disk-shaped portion and the projecting portion of the cylindrical support body, the rod-shaped insertion portion is in contact with the cylindrical support body. Provided in a non-contact state in the body insertion hole,
A retaining member for retaining the abutting body is provided at a protruding portion from the abutting body insertion hole in the rod-shaped insertion portion in a state in which heat conduction with the projecting portion is suppressed. Item 10. A temperature detecting device for a stove according to item 1.   A state in which the retaining member has an annular heat insulating intermediate member interposed between it and the projecting portion, is prevented from moving away from the disk-shaped portion, and is in a non-contact state with the cylindrical support. The temperature detecting device for a stove according to claim 2, wherein the temperature detecting device is externally fitted to a protruding portion from the contact body insertion hole in the rod-shaped insertion portion of the contact body.   The temperature detecting device for a stove according to claim 3, wherein the heat insulating member and the intermediate member are made of the same material and have the same shape.   The temperature detecting device for a stove according to claim 3 or 4, wherein the heat insulating member and the intermediate member are made of a fluororesin.   The cylindrical support body is provided with a cylindrical main body portion and the protruding portion at the upper end to support the contact body, and is mounted in a fitted state on the upper end side of the main body portion. The temperature detection device for a stove according to any one of claims 1 to 5, comprising a support portion.

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