JP2011163759A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooker accurately detecting the temperature of a heating object regardless of the difference of material quality of the heating object by accurately detecting infrared rays to be detected by an infrared intensity detecting means with a reduced risk of degrading the durability of the infrared intensity detecting means. <P>SOLUTION: A heated body 15 for temperature detection abutting on the heating object N is provided, and the infrared intensity detecting means 13 is provided to detect the intensity of infrared rays radiated from the heated body 15 for temperature detection. An arithmetic means is configured to compute the temperature of the heating object N from the intensity of infrared rays detected by the infrared intensity detecting means 13, and a support member 16 supporting the heated body 15 for temperature detection and the infrared intensity detecting means 13 includes a cylindrical part 18. The infrared intensity detecting means 13 is provided bridging inside the cylindrical part 18, and a ventilating type cooling means 26 is provided for ventilating the inside of the cylindrical part 18 with cooling air. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is based on heating means for heating an object to be heated, infrared intensity detecting means for detecting infrared intensity for detecting the temperature of the object to be heated, and infrared intensity detected by the infrared intensity detecting means. The present invention relates to a heating cooker provided with a calculation means for calculating the temperature of the object to be heated.

Conventionally, a cooking device configured to heat an object to be heated by a heating means including a gas combustion type burner has been configured as follows.
That is, the infrared intensity detecting means is configured to detect the infrared intensity for infrared rays emitted from an object to be heated and having two different wavelength ranges, and the computing means detects 2 As a configuration for calculating the temperature of the object to be heated based on the infrared intensity in one wavelength range and the correlation between the temperature and the ratio of the infrared intensity in the two wavelength ranges previously obtained and stored through experiments. There is one that can detect the temperature of an object to be heated regardless of the difference in the material of the object (for example, see Patent Document 1).

As another conventional example, an object to be heated is placed on the upper side of a translucent heat-resistant member made of quartz glass, sapphire, etc., and electromagnetic induction heating is provided on the lower side of the translucent heat-resistant member. In a cooking device configured to heat an object to be heated by means, there has been configured as follows.
That is, the temperature at which the top surface of the translucent heat-resistant member for placing and supporting the object to be heated is coated with black paint or provided with a black plate-like member so as to contact the bottom of the object to be heated. A heating part for detection is configured, and the infrared intensity detecting means is disposed in contact with the translucent heat-resistant member at a position facing the heating part for temperature detection across the translucent heat-resistant member, and the temperature It is configured to detect infrared rays radiated from the lower surface of the detection heating part through the translucent heat-resistant member, and detects the temperature of the object to be heated based on the infrared intensity detected by the infrared intensity detection means. There was what was constituted (for example, refer to patent documents 2).

JP 2002-340339 A JP 2003-121261 A

  In the configuration described in Patent Document 1, if the object to be heated has the same characteristics as the characteristics stored in advance, the correlation between the ratio of the infrared intensity in the two wavelength ranges and the temperature is to be heated. Although it is possible to properly detect the temperature of an object, the relationship between the ratio of the infrared intensity in the two wavelength regions and the temperature in the heated object to be measured is preset and stored. If they are different, there is a disadvantage that the temperature of the object to be heated cannot be accurately detected.

  In the configuration described in Patent Document 2, since the infrared intensity detecting means detects the intensity of infrared rays emitted from the temperature detection heating unit, measurement error due to the difference in the material of the object to be heated. However, in the configuration described in Patent Document 2, the temperature detection heating unit applies black paint or black on the upper surface of the translucent heat-resistant member for placing and supporting the object to be heated. Therefore, if the bottom of the object to be heated is slightly depressed or warped, there is a large difference between the temperature of the object to be heated and the temperature of the temperature detection heating part. Since the temperature of the object to be heated is higher, the temperature of the object to be heated cannot be accurately detected. In addition, since the infrared radiation emitted from the temperature detection heating section is detected by the infrared intensity detecting means after passing through the light-transmissive heat-resistant member constituting the top plate, it is emitted from the object to be heated. Since infrared intensity is attenuated when infrared rays pass through the translucent heat-resistant member, there is a disadvantage that the S / N (signal-to-noise) ratio is lowered and the detection accuracy of the infrared intensity is lowered accordingly. In addition, heat from an object to be heated is easily transmitted to the infrared intensity detecting means through the translucent heat-resistant member, and there is a disadvantage that the infrared intensity detecting means is in a high temperature state and durability is low.

  The object of the present invention is to detect the infrared rays to be detected with high accuracy by the infrared intensity detection means in a state where there is little possibility of lowering the durability of the infrared intensity detection means, regardless of the material of the object to be heated. It is in the point which provides the heating cooker which becomes possible [detecting the temperature of a to-be-heated object accurately].

A heating cooker according to the present invention is detected by a heating means for heating an object to be heated, an infrared intensity detecting means for detecting an infrared intensity for detecting the temperature of the object to be heated, and the infrared intensity detecting means. And a calculation means for calculating the temperature of the object to be heated based on the infrared intensity, the first characteristic configuration is:
There is provided a heated body for temperature detection that is heated in contact with the heated object,
The infrared intensity detection means is provided so as to detect the intensity of infrared rays emitted from the temperature sensing object and introduced through the infrared passage space;
From the information indicating the infrared intensity detected by the infrared intensity detecting means, and the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target body, the calculating means It is configured to calculate the temperature of the object to be heated,
A support member is provided for supporting the temperature detection target body and the infrared intensity detection means in a state in which the temperature detection target body and the infrared intensity detection unit are integrally movable in the approaching / separating direction with respect to the target object.
The temperature detection target is formed in a plate shape, the upper surface is in contact with the bottom of the object to be heated, and is provided so as to emit infrared rays from the lower surface.
The infrared intensity detecting means is provided so as to detect infrared rays emitted from the lower surface of the temperature sensing object;
The support member is
It is provided with a tubular portion formed in a cylindrical shape with the infrared passage space provided therein, and is configured to include the heated body for temperature detection in a state of covering an upper opening of the tubular portion,
In addition, the infrared intensity detection means is bridged inside the cylindrical portion, and infrared rays radiated from the lower surface of the temperature detection target are introduced into the infrared intensity detection means through the infrared passage space. , Configured to shield infrared rays radiated from other than the object to be heated for temperature detection and prevent the infrared rays from being incident on the infrared intensity detecting means,
Ventilation type cooling means is provided for passing cooling air for cooling the infrared intensity detecting means and the inner surface of the support member through the inside of the cylindrical portion.

  According to the first characteristic configuration, the temperature detection target object is heated by contact with the object to be heated, and the intensity of infrared rays emitted from the temperature detection target object and introduced through the infrared passage space is increased. The infrared intensity detection means will detect, but at that time, the heated object for temperature detection is in contact with the object to be heated and heated to the same temperature as or substantially the same as the temperature of the object to be heated. . Then, the computing means is heated from the information indicating the infrared intensity detected by the infrared intensity detecting means and the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target. The temperature of the object is calculated.

  As information indicating the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target object, for example, the temperature of the temperature detection target object and the infrared intensity detection means are previously determined by experiment. This can be dealt with by measuring the relationship with the detected infrared intensity and storing the measurement results as map data. Further, as information indicating the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target, the emissivity of the temperature detection target can be used.

  The relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target is not related to the difference in the material of the object to be heated. Therefore, the temperature of the object to be heated can be obtained accurately.

  Further, with such a configuration, the temperature detection heating body is always contacted and heated even if the bottom of the object to be heated is slightly recessed or warped, so that the bottom of the object to be heated is heated. Regardless of the shape, the temperature can be obtained accurately.

  Since the infrared intensity detection means detects the intensity of infrared rays emitted from the temperature detection target body and introduced through the infrared passage space, the infrared radiation emitted from the temperature detection target object is attenuated. Without being received by the infrared intensity detecting means, the infrared intensity can be detected with high accuracy. In addition, since there is a space between the infrared intensity detection means and the temperature detection heated body, it is difficult for heat to be transferred from the temperature detection heated body to the infrared intensity detection means, and the infrared intensity detection means is in a high temperature state. There is little risk and there is little risk of reducing durability.

Therefore, in a state where there is little risk of lowering the durability of the infrared intensity detection means, the infrared intensity detection means accurately detects the infrared rays to be detected, and regardless of the material of the heated object, It came to be able to provide the cooking device which can detect temperature accurately.
In addition, since the temperature detection object is formed in a plate shape and the upper surface is in contact with the bottom of the object to be heated and radiates infrared rays from the lower surface, the heat heated by the object to be heated is the lower surface. The temperature of the lower surface is the same as or close to the temperature of the object to be heated. As a result, the temperature of the object to be heated can be accurately obtained based on the infrared intensity detected by the infrared intensity detecting means.
Further, the support member includes a cylindrical portion formed in a cylindrical shape, and includes a heated body for temperature detection in a state of covering an upper opening of the cylindrical portion, and is located inside the cylindrical portion. An infrared intensity detection means is provided. Then, infrared rays radiated from the lower surface of the temperature detection target are introduced into the infrared intensity detecting means through the infrared passage space and appropriately detected, and the infrared rays radiated from other than the temperature detection target are shielded. Thus, it is prevented from entering the infrared intensity detecting means.
That is, a support member for integrally supporting the temperature detection target and the infrared intensity detection means is configured in a cylindrical shape, and the temperature detection target and the infrared intensity detection means are arranged at appropriate positions. By appropriately detecting the intensity of the infrared rays emitted from the lower surface of the temperature detection target object while shielding the infrared rays emitted from other objects than the temperature detection target object and reducing detection errors Is possible.
In addition, since the infrared intensity detecting means is cooled by the cooling air being ventilated by the ventilation type cooling means, the infrared intensity detecting means is suppressed from being cooled and the temperature rises, thereby improving the durability. It is possible to reduce measurement errors due to temperature fluctuations. In addition, since the inner surface of the support member is cooled by the cooling air, the infrared radiation emitted from the lower surface of the temperature detection target object is avoided by avoiding an increase in infrared radiation due to the temperature rise of the inner surface of the support member. It is possible to appropriately detect the intensity of.

  According to a second characteristic configuration of the present invention, in addition to the first characteristic configuration, an urging means for elastically urging the support member in a direction approaching the object to be heated is provided.

  According to the second characteristic configuration, the temperature detection target object and the infrared intensity detection unit are supported by the support member so as to be integrally movable, and the biasing unit approaches the object to be heated. Is elastically biased. Therefore, the temperature detection heated body is pressed against the object to be heated while the separation distance between the temperature detection heated body and the infrared intensity detection means is always maintained constant. The heated body for temperature detection is appropriately brought into contact with the heated object and is heated by the heat of the heated object.

  In addition, since the heated object for temperature detection should just be heated with the heat | fever of a to-be-heated material, it is not necessary to press with a strong force, and the urging | biasing force of an urging means can be completed with a small force, and it is lightweight. Even the object to be heated can be used in a state where there is no disadvantage such as the object to be heated is lifted by the urging force of the urging means.

  In addition to the first characteristic configuration, the third characteristic configuration of the present invention is a plate-like configuration in which the temperature detection target is made of a material having high thermal conductivity that contacts the bottom of the target object. The main body portion and an infrared radiation portion formed by applying a high emissivity material on the lower surface side of the main body portion are provided.

According to the 3rd characteristic structure, since the plate-shaped main-body part comprised with a material with high heat conductivity contacts a to-be-heated material, it becomes what becomes easy to transmit the heat of a to-be-heated material. And since the infrared radiation part on the lower surface side of the main body is made of a material with a high emissivity, it can radiate a lot of infrared rays by the heat transmitted to the main body, and the temperature of the object to be heated is as accurate as possible. It becomes possible to detect.
In addition, since the infrared radiation portion is formed by applying a high emissivity material to the lower surface side of the main body, for example, a hard plate made of a high emissivity material is attached to the main body. Compared to the case of bonding, it is easier to create, and the cost can be reduced.

  According to a fourth characteristic configuration of the present invention, in addition to the first characteristic configuration, the inner surface of the support member is configured to have a low emissivity.

  According to the fourth characteristic configuration, since the inner surface of the support member is configured to have a low emissivity, there is little infrared radiation from the inner surface of the support member, so measurement error due to infrared radiation radiated from the support member itself Thus, it is possible to appropriately detect the intensity of the infrared ray emitted from the lower surface of the temperature detection object by the infrared intensity detection means.

According to a fifth characteristic configuration of the present invention, in addition to the first characteristic configuration, the cylindrical portion is positioned outside in a state in which a space is formed between the inner cylindrical member positioned inside and the inner cylindrical member. The infrared intensity detecting means configured to hold the temperature detection target body in a state of covering an upper opening of the outer cylinder member and located inside the inner cylinder member. Configured with
The ventilating cooling means ventilates upward through the inside of the inner cylinder member, and is used for ventilation between the upper end portion of the inner cylinder member and the temperature detection target to be heated. The cooling air is passed in a state of passing through the open portion and further venting downward through the space formed between the inner cylinder member and the outer cylinder member and discharging to the outside. It is in the point.

  According to the fifth characteristic configuration, the cylindrical portion includes an inner cylinder member and an outer cylinder member, holds the heated body for temperature detection in a state of covering the upper opening of the outer cylinder member, and the inner cylinder member Infrared intensity detection means is provided in a state of being located inside. Then, the cooling means ventilates upward through the inside of the inner cylinder member, and passes through an opening portion for ventilation formed between the upper end portion of the inner cylinder member and the temperature detection target to be heated. Further, the cooling air is ventilated in a state where the air is vented downward through the space formed between the inner cylinder member and the outer cylinder member and discharged to the outside.

  That is, the infrared intensity detecting means is cooled when the cooling air passes through the inside of the inner cylinder member, and the cooling air is ventilated through the space formed between the inner cylinder member and the outer cylinder member. Even if the cylindrical member is heated by the heat from the heating means, it is possible to effectively prevent the heat from being transmitted to the inside of the inner cylindrical member, and the infrared intensity detecting means can suppress the temperature rise.

  According to a sixth feature configuration of the present invention, in addition to any of the first feature configuration to the fifth feature configuration, the infrared intensity detection means is in a range of 1.5 μm to 1.8 μm, 2.0 μm to It is configured to detect the intensity of infrared rays in a wavelength range within a range of 2.4 μm or less, within a range of 3.1 μm or more and 4.2 μm or less, or within a range of 8.0 μm or more and 12.0 μm or less. There is in point.

According to the sixth feature, when the infrared rays pass through the air, the temperature is appropriately detected in a state in which the infrared rays are absorbed by the carbon dioxide (CO ₂ ) and moisture (H ₂ O) contained in the air and are less likely to be attenuated. It is possible to detect the infrared intensity emitted from the object to be heated.

In the air, carbon dioxide and moisture exist in a gaseous state. And when it is radiated | emitted from the to-be-heated body for temperature detection, and is introduce | transduced into an infrared intensity detection means through the space for infrared rays passage, infrared rays will be absorbed by the carbon dioxide and water | moisture content which exist in the air.
In addition, as shown in FIG. 5, within the range of 1.5 μm to 1.8 μm, within the range of 2.0 μm to 2.4 μm, within the range of 3.1 μm to 4.2 μm. Or, infrared rays are absorbed by carbon dioxide or moisture within a wavelength range excluding the range of 8.0 μm or more and 12.0 μm or less. Therefore, if the infrared intensity is detected at a wavelength within the wavelength range as described above, it will cause noise when detecting the infrared intensity emitted from the temperature detection target.

  Therefore, when the infrared intensity is detected by the infrared intensity detection means, infrared rays in a wavelength range in which the infrared rays are not absorbed or hardly absorbed by the carbon dioxide and moisture as described above are detected. In this way, accurate infrared intensity can be detected.

  As an infrared intensity detection means for detecting the infrared intensity of infrared rays in the above-mentioned wavelength range, Ge (germanium) or InGaAs (inGaAs (when the wavelength of infrared rays to be detected is in the range of 0.8 μm to 2.6 μm) When an infrared sensor using indium gallium arsenide) is used as an infrared cell, if the wavelength of infrared rays to be detected is in the range of 1.5 μm to 5.0 μm, PbS (lead sulfide) or PbSe (lead selenide) is used. An infrared sensor used as an infrared cell can be used. Moreover, when the wavelength of the infrared rays to be detected is in the range of 9 μm to 11.5 μm, an infrared sensor using HgCdTe (mercury cadmium telluride) as an infrared cell can be used. In addition, a thermopile or a power raising element that is a thermal infrared cell can be used in all wavelength regions.

Schematic configuration diagram of the stove Longitudinal side view of support member Transverse plan view of support member The figure which shows the relationship between the temperature of the to-be-heated body for temperature detection, and the output of an infrared detection part Spectral distribution chart showing wavelength absorption Schematic configuration diagram of another embodiment

Hereinafter, an embodiment in the case of applying a cooking device according to the present invention to a gas combustion type stove will be described based on the drawings.
As shown in FIG. 1, the stove places a flat top plate 1 having a circular heating opening 1a and a heated object N such as a pot for cooking an object to be heated, spaced above the opening 1a. A possible virtues 2, a burner 3 as a heating means for heating an object N to be heated placed on the virtues 2, a combustion control unit 4 for controlling the operation of the burner 3, and the like are provided.

  The burner 3 is a Bunsen combustion type internal flame type burner. The gas nozzle 6 ejects the fuel gas G supplied through the fuel supply passage 5, the fuel gas G is ejected from the gas nozzle 6, and the fuel gas G The mixing tube 7 to which the combustion air A is supplied by the suction action accompanying the ejection of the gas and the plurality of flame ports 8 that eject the air-fuel mixture to the inner peripheral portion are provided, and the air-fuel mixture is supplied from the mixing tube 7. An annular casing member 9 and the like are provided, and the burner 3 is provided below the opening 1a.

  In the burner 3, the mixture of the fuel gas G and the air A supplied from the mixing pipe 7 into the annular casing member 9 is ejected from the flame port 8 toward the center of the annular casing member 9 in a substantially horizontal direction. The mixture of the jetted fuel gas G and air A burns, and a flame F is formed upward through the opening 1a.

  The fuel supply path 5 is provided with a fuel supply intermittent valve 10 for intermittently supplying the fuel gas G to the gas nozzle 6 and a fuel supply amount adjusting valve 11 for adjusting the supply amount of the fuel gas G to the gas nozzle 6. In the lower part of the annular casing member 9 of the burner 3, a juice receiving tray 12 is provided for receiving boiled food that has fallen through the opening 1a.

  Furthermore, this stove was radiated from a temperature detection heated body 15 that is located on the lower side of the top plate 1 and located in the center of the juice receiving tray 12 and that is heated in contact with the heated object N. An infrared intensity detection unit 13 is provided as an infrared intensity detection unit that detects the intensity of infrared rays. The calculation unit calculates the temperature of the object to be heated N based on the infrared intensity detected by the infrared intensity detection unit 13. A calculation unit 14 is provided.

  A temperature detecting body 15 to be heated in contact with the object N to be heated is provided, and the infrared intensity detector 13 is radiated from the temperature detecting body 15 and introduced through the infrared passage space. The infrared intensity detected by the infrared intensity detector 13 and the infrared intensity detected by the infrared intensity detector 13 and the heated object for temperature detection are provided. 15 is configured to calculate the temperature of the object N to be heated from information indicating the relationship with the temperature at 15.

  Further, a support member 16 that supports the temperature detection target body 15 and the infrared intensity detection unit 13 in a state in which the temperature detection target body 15 and the infrared intensity detection unit 13 are integrally movable in a vertical direction as an approaching / separating direction with respect to the target object N, and A coil spring 17 is provided as an urging means that urges the object to be heated N in an approaching direction.

  And the said support member 16 is provided with the cylindrical part 18 formed in the cylinder shape in the state which has the said infrared passage space inside, and the to-be-heated body for temperature detection in the state which covers the upper opening of the cylindrical part 18 15 and is provided with an infrared intensity detection unit 13 in a state of being located inside the cylindrical part 18, and infrared intensity emitted from the lower surface of the temperature detection target body 15 through the infrared passage space. The infrared ray is introduced into the detection unit 13 and shielded from the infrared rays radiated from other than the temperature detection target object 15 and is prevented from entering the infrared intensity detection unit 13.

  In other words, as shown in FIG. 2, the cylindrical portion 18 has an inner cylindrical member 19 positioned on the inner side and an outer cylinder positioned on the outer side in a state of forming a space between the inner cylindrical member 19. The member 20 is configured so as to hold the temperature detection target body 15 in a state of covering the upper opening of the outer cylinder member 20, and the infrared intensity detection unit 13 is located inside the inner cylinder member 19. It is prepared for.

  The support member 16 has a large-diameter cylindrical portion 18 configured in a double cylindrical structure composed of an inner cylindrical member 19 and an outer cylindrical member 20 provided concentrically with the axial core facing in the vertical direction; A small-diameter slide shaft portion 21 connected to the lower side of the cylindrical portion 18 of the double cylinder structure is integrally connected. The relay plate 22 positioned at the lower end of the cylindrical portion 18 has a function as a connecting member that connects the inner cylindrical member 19, the outer cylindrical member 20, and the slide shaft portion 21 to each other.

  The temperature detection heated body 15 is formed in a plate shape, and is attached and held in a fixed state at the upper end portion of the outer cylinder member 20 so as to close the upper opening of the outer cylinder member 20, and the upper surface is heated. It is provided so as to be in contact with the bottom of the object N and to emit infrared rays from the lower surface. Further, the upper end portion of the inner cylinder member 19 and the infrared intensity detection unit 13 are separated from each other so that heat from the heated object N is not directly transmitted to the inner cylinder member 19.

  The infrared intensity detection unit 13 is provided in a state of being positioned on the inner side of the inner cylinder member 19 in the cylindrical part 18 and in an intermediate part in the vertical direction and being fixed to the inner cylinder member 19 via the bracket 23. It has been. The infrared intensity detection unit 13 is positioned below the temperature detection target body 15 and detects infrared radiation radiated from the lower surface of the temperature detection target object 15.

  A coil spring 17 is provided as a biasing means that elastically biases the support member 16 upward as a direction in which the support member 16 approaches the object to be heated N. In other words, the slide shaft portion 21 is fitted into the boss portion 24 on the fixed portion side so as to be slidable in the vertical direction, and the entire support member 16 is supported so as to be slidable in the vertical direction. It has a configuration. The coil spring 17 is externally fitted to the slide shaft portion 21 and is interposed between the upper end portion of the boss portion 24 on the fixed portion side and the relay plate 22.

  That is, the support member 16 is configured to be moved upward and biased by the coil spring 17, and the contact restriction portion 25 provided at the lower end portion of the slide shaft portion 21 contacts the lower end portion of the boss portion 24. The position is restricted at the set position, and further upward movement is restricted. In this set position, in a state where the heated object N is not placed on the virtues 2, the upper end portion of the support member 16 is positioned slightly above the position of the bottom of the heated object N placed on the virtues 2. Thus, when the object N to be heated is placed on the virtues 2, the temperature detection object 15 is reliably brought into contact with the bottom of the object N and pressed by the urging force. Yes.

  The temperature detection target body 15 includes a plate-like main body portion 15a made of a material having high thermal conductivity contacting the bottom portion of the target object N, and a high emissivity on the lower surface side of the main body portion 15a. And an infrared radiation portion 15b formed by applying the above material. Specifically, as shown in FIG. 2, the plate-like main body 15a is made of a material having high thermal conductivity, for example, stainless steel, and a high emissivity material is formed on the lower surface side of the stainless steel main body 15a. The infrared radiation portion 15b is formed by applying a black paint. That is, the infrared radiation portion 15b is configured to have a high emissivity as close as possible to a black body.

  The inner surfaces of the inner cylinder member 19 and the outer cylinder member 20 are configured to have a low emissivity. That is, the inner cylinder member 19 and the outer cylinder member 20 are made of, for example, a metal material such as stainless steel, iron, or aluminum, but the inner surface thereof is subjected to surface processing so as to become a glossy surface. With this configuration, the radiation intensity of infrared rays is made as low as possible with a low radiation rate.

  A blower fan 26 is provided as an example of ventilation-type cooling means for allowing cooling air to cool the inner surfaces of the infrared intensity detection unit 13 and the support member 16 through the inside of the cylindrical part 18. That is, as shown in FIG. 2, the slide shaft portion 21 is formed in a cylindrical shape, and the internal space S1 of the slide shaft portion 21 is used as an air passage, and the internal space S1 of the slide shaft portion 21 is an inner cylinder. The member 19 communicates with the internal space S2. A blower fan 26 that supplies cooling air to the internal space S1 of the slide shaft portion 21 via the supply pipe 27 is provided, and the cooling air generated by the blower fan 26 passes through the supply pipe 27 and the slide shaft portion 21. It is comprised so that it may be supplied to internal space S1. And in the area | region corresponding to the space between the inner cylinder member 19 and the outer cylinder member 20 in the board | plate member 22 for a relay, as shown in FIG. 3, the discharge part 28 in which many small diameter holes were formed uniformly is formed. Has been.

  Accordingly, the cooling air generated by the blower fan 26 is passed upward through the internal space S <b> 2 of the inner cylinder member 19, and is formed between the upper end portion of the inner cylinder member 19 and the infrared intensity detection unit 13. Passing through the ventilation opening S3, it flows into the space S4 between the inner cylinder member 19 and the outer cylinder member 20, and passes downward through the space S4 between the inner cylinder member 19 and the outer cylinder member 20. The air is ventilated toward the outside and discharged from the discharge unit 28 to the outside. The discharge portion 28 is formed with a large number of small-diameter holes so that the cooling air can flow substantially uniformly without being biased to a specific location. The cooling air cools the infrared intensity detector 13 and the inner surface of the support member 16.

  Of the internal space S2 of the inner cylinder member 19, the space from the heated body 15 for temperature detection to the infrared intensity detection unit 13 corresponds to the infrared passage space.

Next, the configuration of the infrared intensity detection unit 13 will be described.
The infrared intensity detection unit 13 includes a bandpass filter 29 that selectively transmits only infrared rays in a predetermined wavelength range, and an infrared detection element 30 that detects infrared rays that have passed through the bandpass filter 29. Yes. In addition to the infrared detection element 30, various electric circuits for signal processing are also provided, but the description thereof is omitted here.

The wavelength range selectively transmitted by the bandpass filter 29 is set as a wavelength range in which infrared rays are not absorbed or hardly absorbed by carbon dioxide (CO ₂ ) or moisture (H ₂ O) present in the air. Yes.

  In addition, as shown in FIG. 5, within the range of 1.5 μm to 1.8 μm, within the range of 2.0 μm to 2.4 μm, within the range of 3.1 μm to 4.2 μm. Or, infrared rays are absorbed by carbon dioxide or moisture within a wavelength range excluding the range of 8.0 μm or more and 12.0 μm or less. That is, each wavelength range described above corresponds to a wavelength range in which infrared rays are not absorbed or hardly absorbed by carbon dioxide and moisture present in the air.

  Therefore, the wavelength range selectively transmitted by the bandpass filter 29 is in the range of 1.5 μm to 1.8 μm, in the range of 2.0 μm to 2.4 μm, 3.1 μm to 4.2 μm. Any wavelength range within the following range or within a range of 8.0 μm or more and 12.0 μm or less is set.

Next, the infrared detection element 30 will be described.
As the infrared detecting element 30, when the wavelength of the infrared ray to be detected is in the range of 0.8 μm to 2.6 μm, Ge (germanium) or InGaAs (indium gallium arsenide) is used as the infrared cell, When the target infrared wavelength is in the range of 1.5 μm to 5.0 μm, PbS (lead sulfide) or PbSe (lead selenide) is used as the infrared cell, and the infrared wavelength of the detection target Is in the range of 9 μm to 11.5 μm, it is relatively expensive, but one using HgCdTe (mercury cadmium tellurium) as an infrared cell can be used. In addition, a thermopile or a power raising element that is a thermal infrared cell can be used in all wavelength regions.

  In addition, the infrared detection element 30 configured by using PbS (lead sulfide) or PbSe (lead selenide) as an infrared cell operates infrared rays in the range of 1.5 μm to 5.0 μm at room temperature (300 K). Detection is possible at temperature, and the sensitivity to infrared rays in the range of 3.1 μm or more and 4.2 μm or less is relatively high and the detection output is large. Therefore, when setting the wavelength range to be set within the range of 3.1 μm or more and 4.2 μm or less, the infrared detection element 30 is configured using PbS (lead sulfide) or PbSe (lead selenide) as an infrared cell. It is preferable to do this.

Next, a process for obtaining the temperature of the object N to be heated by the calculation unit 14 will be described.
The calculation unit 14 is information indicating the infrared intensity detected by the infrared intensity detection unit 13 and the relationship between the infrared intensity detected by the infrared intensity detection unit 13 and the temperature in the temperature detection target 15. From this, the temperature of the object to be heated is calculated.

  In this stove, the detection object whose infrared intensity is detected by the infrared intensity detection unit 13 is the temperature detection object 15 and is always the same object. Therefore, by the experiment, the temperature detection target object 15 is heated by the object N to be heated, and the temperature of the temperature detection target object 15 is varied. For example, as shown in FIG. 4, the infrared intensity is detected, and the relationship between the detected infrared intensity and the temperature of the temperature detection object 15 is obtained as map data and stored in a storage means (not shown). is there.

  And when detecting the temperature of the to-be-heated object N by which the to-be-heated object N is mounted in Gotoku 2 and heated by the burner 3, it is radiated | emitted from the to-be-heated object 15 for temperature detection heated by the to-be-heated object N. The infrared intensity detecting unit 13 detects the intensity of infrared rays to be detected, and the calculating unit 14 determines the temperature detection target object 15 from the infrared intensity detected by the infrared intensity detecting unit 13 and the map data. The temperature of the object to be heated N is obtained from the temperature of the object 15 for temperature detection.

  The temperature determined by the calculation unit 14 is output to the combustion control unit 4, and the combustion control unit 4 performs the fuel supply intermittent valve 10, the fuel supply based on the temperature calculated by the calculation unit 14. By controlling the quantity control valve 11 and the like, it is configured to perform automatic temperature control of the object N to be heated, emergency stop control when the object N is overheated, and the like.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the embodiment described above, the calculation unit 14 serving as the calculation unit determines the relationship between the infrared intensity detected by the infrared intensity detection unit and the temperature of the temperature detection target body 15 by experiments in advance. The relationship between the infrared intensity detected by the infrared intensity detection unit 13 when the detection object 15 is heated and the temperature of the temperature detection object 15 is stored as map data. Instead of such a configuration, the following configuration may be used.

  That is, as the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target 15, the information and the infrared are used using the information on the emissivity of the temperature detection target 15. It is good also as a structure which calculates | requires the temperature of a to-be-heated object from the detection information of an intensity | strength detection means.

  In other words, the infrared intensity radiated from the temperature detection target 15 is the same as the value obtained by multiplying the infrared intensity radiated from the black body at the same temperature by the emissivity of the temperature detection target 15. . In addition, the relationship between the intensity of infrared rays emitted from the black body and the temperature has a uniform relationship given by Planck's law. Accordingly, when the infrared intensity radiated from the temperature detection object 15 is detected, the temperature of the object to be heated can be obtained from the detected infrared intensity.

  Therefore, the calculation means uses the information on the emissivity of the temperature detection target object as the relationship between the infrared intensity detected by the infrared intensity detection means and the temperature of the temperature detection target object. It can be set as the structure which calculates | requires the temperature of a to-be-heated object from information and the detection information of an infrared intensity detection means.

(2) In the above-described embodiment, the heating unit is configured by an internal flame type burner that injects and burns the air-fuel mixture inward from the annular casing member, but instead of such a configuration, As shown in FIG. 6, you may comprise as a stove provided with the Bunsen combustion type burner 3 which spouts air-fuel mixture upwards outward. In this configuration, a through-hole 31 penetrating in the vertical direction is formed in the central portion of the burner 3, and the temperature detecting heated body 15 is provided in the upper portion through the through-hole 31 as in the above embodiment. It becomes the structure provided in the state which inserts the support member 16 which equips the inside with the infrared intensity detection part 13. FIG.

(3) In the above embodiment, the coil spring is used as the biasing means for elastically biasing the support member toward the object to be heated. However, the coil spring is not limited to the coil spring, and a rubber spring or other elastic material such as rubber is used. It can be implemented in various forms such as a configuration using a restoring force. Further, without providing such an urging means, the support member may be provided in a fixed position so that the virtues can be elastically lowered by the weight of the object to be heated.

(4) In the above-described embodiment, the temperature detection target heating member is supported by the support member so as to be movable in the approaching / separating direction with respect to the target heating object. The object to be heated is placed on and supported by the top plate, and a part of the top plate is configured by the temperature detection target object, so that the target object contacts the upper surface of the temperature detection target object. And it is good also as a structure which detects the infrared rays radiated | emitted through the space for infrared passage from the lower surface of the said to-be-heated body for temperature detection by an infrared detection means.

(5) In the said embodiment, the said to-be-heated body for temperature detection comprises the plate-shaped main-body part comprised with the material with high heat conductivity which contacts the bottom part of the said to-be-heated material, and the lower surface of the main-body part. An example of a structure including an infrared radiation portion formed by applying a high emissivity material on the side is illustrated, but instead of such a configuration, a hard plate made of a high emissivity material May be integrated by sticking or adhering to the main body portion to constitute the temperature detection target.

(6) In the above embodiment, a gas combustion burner is used as the heating means. However, the heating means is not limited to the burner. For example, a heating lamp using a halogen lamp that emits red heat or an electric resistance wire is used. You may comprise by an electric heating part, such as what uses the built-in sheathed heater, or the thing using the magnetic field generation coil which performs electromagnetic induction heating.

DESCRIPTION OF SYMBOLS 3 Heating means 13 Infrared intensity detection means 14 Calculation means 15 Heated object for temperature detection 16 Support member 17 Energizing means 18 Cylindrical part 19 Inner cylinder member 20 Outer cylinder member 26 Cooling means

Claims (6)

A heating means for heating the object to be heated, an infrared intensity detection means for detecting an infrared intensity for detecting the temperature of the object to be heated, and the object to be heated based on the infrared intensity detected by the infrared intensity detection means A cooking device comprising a computing means for computing the temperature of
There is provided a heated body for temperature detection that is heated in contact with the heated object,
The infrared intensity detection means is provided so as to detect the intensity of infrared rays emitted from the temperature sensing object and introduced through the infrared passage space;
From the information indicating the infrared intensity detected by the infrared intensity detecting means, and the relationship between the infrared intensity detected by the infrared intensity detecting means and the temperature in the temperature detection target body, the calculating means It is configured to calculate the temperature of the object to be heated,
A support member is provided for supporting the temperature detection target body and the infrared intensity detection means in a state in which the temperature detection target body and the infrared intensity detection unit are integrally movable in the approaching / separating direction with respect to the target object.
The temperature detection target is formed in a plate shape, the upper surface is in contact with the bottom of the object to be heated, and is provided so as to emit infrared rays from the lower surface.
The infrared intensity detecting means is provided so as to detect infrared rays emitted from the lower surface of the temperature sensing object;
The support member is
It is provided with a tubular portion formed in a cylindrical shape with the infrared passage space provided therein, and is configured to include the heated body for temperature detection in a state of covering an upper opening of the tubular portion,
In addition, the infrared intensity detection means is bridged inside the cylindrical portion, and infrared rays radiated from the lower surface of the temperature detection target are introduced into the infrared intensity detection means through the infrared passage space. , Configured to shield infrared rays radiated from other than the object to be heated for temperature detection and prevent the infrared rays from being incident on the infrared intensity detecting means,
A heating cooker provided with ventilation type cooling means for passing cooling air for cooling the infrared intensity detection means and the inner surface of the support member through the inside of the cylindrical portion.   The cooking device according to claim 1, further comprising an urging unit that elastically urges the support member in a direction approaching the object to be heated. The temperature detection object to be heated is
Infrared radiation formed by applying a plate-shaped main body portion made of a material having high thermal conductivity in contact with the bottom of the object to be heated and applying a high emissivity material to the lower surface side of the main body portion. The cooking device according to claim 1, further comprising a portion.   The cooking device according to claim 1, wherein an inner surface of the support member is configured to have a low emissivity. The cylindrical portion includes an inner cylindrical member positioned on the inner side, and an outer cylindrical member positioned on the outer side in a state in which a space is formed between the inner cylindrical member and the outer cylindrical member. The temperature detection target is held in a state of covering the upper opening, and is configured to include the infrared intensity detection means in a state of being located inside the inner cylinder member,
The ventilating cooling means ventilates upward through the inside of the inner cylinder member, and is used for ventilation between the upper end portion of the inner cylinder member and the temperature detection target to be heated. The cooling air is passed in a state of passing through the open portion and further venting downward through the space formed between the inner cylinder member and the outer cylinder member and discharging to the outside. The cooking device according to claim 1.   7. the infrared intensity detecting means is in the range of 1.5 μm or more and 1.8 μm or less, in the range of 2.0 μm or more and 2.4 μm or less, in the range of 3.1 μm or more and 4.2 μm or less, or The cooking device according to any one of claims 1 to 5, wherein the cooking device is configured to detect the intensity of infrared rays in a wavelength range within a range of 0 µm or more and 12.0 µm or less.

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