JP2012189281A - Combustion type heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion type heating device that can satisfactorily detect the temperature of an object to be heated whether the heating amount is large or small.SOLUTION: The combustion type heating device 100 includes: a heating means 3 for heating the object N to be heated; a temperature detection means 30 for detecting the temperature at the specified part of the object N to be heated; and a temperature estimation means 60 for estimating the temperature of the object N to be heated on the basis of the temperature at the specified part of the object N to be heated detected by the temperature detection means 30, wherein a small fire heating part where the object N to be heated is heated in such a small fire heating state that the heating amount is small is different from a large fire heating part where the object N to be heated is heated in such a large fire heating state that the heating amount is large. The combustion type heating device 100 further includes a first temperature detection means 30A for detecting the temperature at the small fire heating part and a second temperature detection means 30B for detecting the temperature at the large fire heating part. The temperature estimation means 60 estimates the temperature of the object N to be heated on the basis of the temperature detection value Tof the first temperature detection means and the temperature detection value Tof the second temperature detection means.

Description

  The present invention comprises a heating means for heating an object to be heated, and a temperature detecting means for detecting the temperature of a specific part of the object to be heated, and the temperature of the specific part of the object to be heated detected by the temperature detecting means. Based on this, the apparatus is provided with temperature estimating means for estimating the temperature of the object to be heated, and a small fire heating part where the object to be heated is heated in a small fire heating state with a small heating amount, and a large fire heating with a large heating amount The present invention relates to a combustion-type heating device that is different from a large fire heating site where the object to be heated is heated in a state.

  2. Description of the Related Art Conventionally, gas cookers that are a type of combustion heating device have been provided with a safety function in order to prevent a tempura fire or the like. In such a gas cooker, for example, the temperature of the pan bottom is detected by a contact temperature sensor or a non-contact temperature sensor, and when the detected temperature reaches a predetermined temperature, it is determined that the cooker is in an overheated state. In addition, a safety function is realized by forcibly closing a solenoid valve provided in a gas supply path to the burner to automatically extinguish the fire (for example, see Patent Documents 1 and 2).

JP 2006-220395 A JP 2009-92266 A

However, in the configuration in which temperature detection is performed at a specific part as in the conventional gas cooker, temperature detection may not be performed satisfactorily depending on the cooking mode. For example, in the case of a configuration in which the temperature sensor is in contact with the pan bottom central portion to detect the temperature of the object to be heated, the temperature at the pan bottom central portion is lower than the pan bottom outer peripheral portion where the combustion flame actually hits. The temperature of the heated object cannot be accurately detected, and cannot be detected at a site where the temperature is highest.
In particular, in a combustion-type heating apparatus such as a gas cooker, the amount of mixed gas supplied to the flame varies depending on the heating amount, and therefore, the portion of the pan bottom where the combustion flame strikes best varies depending on the heating amount. For example, in the case of a gas cooker that employs a burner with a large number of flame holes arranged in an annular shape, if the amount of heating is small, the combustion flame hits the center of the pan bottom, but if the amount of heating is large, the pan bottom The combustion flame hits the outer peripheral side part and the pan peripheral wall part. As described above, in particular, in a combustion heating apparatus such as a gas cooker, the temperature of the object to be heated may not be detected well depending on the amount of heating in the configuration in which the detection is performed at a specific part such as the center part of the pan bottom.

  The present invention has been made in view of the above circumstances, and its purpose is to detect the temperature of an object to be heated satisfactorily regardless of whether the heating amount is small or the heating amount is large. It is in providing a combustion type heating device.

  In order to achieve this object, a combustion heating apparatus according to the present invention comprises a heating means for heating an object to be heated, a temperature detecting means for detecting the temperature of a specific part of the object to be heated, and the temperature detecting means. Temperature estimation means for estimating the temperature of the object to be heated based on the detected temperature of the specific part of the object to be heated, and a small fire in which the object to be heated is heated in a small fire heating state with a small heating amount A combustion-type heating device in which a heating portion and a large-fire heating portion where the object to be heated is heated in a large-heat heating state in which a heating amount is large is different, and the first characteristic configuration thereof is the small-fire as the temperature detection means. 1st temperature detection means which detects the temperature of a heating part, and 2nd temperature detection means which detects the temperature of the said large fire heating part, The said temperature estimation means is the temperature detection value of the said 1st temperature detection means, and the said Temperature detection of the second temperature detection means Based on, it is the in that for estimating the temperature of the heated object.

  According to this characteristic configuration, the temperature of the object to be heated is the first temperature detecting means for detecting the temperature of the small fire heating part where the object to be heated is heated in the small fire heating state where the heating amount is small, and the heating amount is It is estimated by effectively utilizing both of the temperature detection values measured by each of the second detection means for detecting the temperature of the large fire heating part where the object to be heated is heated in a large large fire heating state. Therefore, it is possible to provide a combustion type heating apparatus that can detect the temperature of the object to be heated well in both cases where the heating amount is small and the heating amount is large.

  In addition to the first characteristic configuration, the second characteristic configuration of the combustion heating apparatus according to the present invention is a heating state adjusting unit that adjusts a heating amount of the object to be heated, and the heating that is adjusted by the heating state adjusting unit. Storage means for storing relationship information capable of estimating the temperature of the object to be heated based on the amount and the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means, The temperature estimating means is to estimate the temperature of the object to be heated using the relationship information.

According to this characteristic configuration, the relationship information that takes into account the amount of heating of the object to be heated adjusted by the heating state adjustment unit is used together with the temperature detection value of the first temperature detection unit and the temperature detection value of the second temperature detection unit. Thus, the temperature of the object to be heated can be estimated appropriately.
In the combustion type heating device, the amount of the mixed gas supplied to the flame varies depending on the heating amount, and therefore, the portion where the combustion flame best hits varies depending on the heating amount. For example, in the case of a gas cooker that employs a burner with a large number of flame holes arranged in an annular shape, if the amount of heating is small, the combustion flame will hit the bottom center side part of the cooking utensil, but if the amount of heating is large A combustion flame hits the outer peripheral side part and peripheral wall part of the bottom part of the cooking utensil. Therefore, in such a gas cooker, when the heating amount is close to a small fire heating state, the temperature of the first temperature detecting means for detecting the temperature of the bottom center side portion of the cooking utensil that is the small fire heating portion. When the detected value is close to the large fire heating state where the heating amount is large, the temperature detection value of the second temperature detecting means for detecting the temperature of the bottom outer peripheral portion and the peripheral wall portion of the cooking utensil that is the large fire heating portion is heated. Thus, the temperature is closer to the temperature of the part where the temperature is the highest, and should be referred to with a specific gravity in estimating the temperature of the object to be heated.
As described above, the temperature detection value to be referred to varies depending on the heating amount, and thus, based on the heating amount, how the temperature of the object to be heated is determined from the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means. By defining and using whether the temperature is estimated as the relationship information, the temperature of the object to be heated can be estimated appropriately.

  In addition to the first feature configuration, the third feature configuration of the combustion-type heating device according to the present invention includes a temperature detection value of the first temperature detection unit and a temperature detection value of the second temperature detection unit. On the other hand, the temperature detection value on the higher temperature side is estimated as the temperature of the object to be heated.

  According to this characteristic configuration, of the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means, the temperature detection value on the high temperature side indicating the possibility that the heated object is excessively hot. Is estimated as the temperature of the object to be heated. By performing safety control based on the estimated temperature of the object to be heated, overheating of the object to be heated can be satisfactorily prevented. Thereby, a combustion type heating device with high safety can be provided.

  In addition to any of the first to third feature configurations, the fourth feature configuration of the combustion heating apparatus according to the present invention is the temperature detection value of the first temperature detection means and the temperature of the second temperature detection means. On the condition that the detected value is within a predetermined temperature range, the temperature estimating means is configured to perform the heating based on the temperature detected value of the first temperature detecting means and the temperature detected value of the second temperature detecting means. The point is to estimate the temperature of the object.

  According to this characteristic configuration, since the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means are within a predetermined temperature range, the first temperature detection means and the second temperature Only when it is considered that both of the detection means and the detection means are operating normally, the temperature of the object to be heated can be estimated. Thereby, the erroneous estimation by the temperature estimation means can be prevented, and the temperature of the object to be heated can be estimated only in a highly reliable range.

  The fifth characteristic configuration of the combustion heating apparatus according to the present invention is the temperature detection value of the first temperature detection means and the temperature of the second temperature detection means in addition to any of the first characteristic configuration to the fourth characteristic configuration. If one or both of the detected values remain in the predetermined low temperature range even after a predetermined time has elapsed since the start of heating, it is determined that the temperature detecting means that detected the detected temperature value is abnormal. In the point.

According to this characteristic configuration, when it is considered that an abnormality has occurred in one or both of the first temperature detection means and the second temperature detection means, the abnormality of the temperature detection means can be accurately determined. it can.
That is, when heated by a combustion heating apparatus, the temperature of the object to be heated usually rises to a predetermined temperature or higher after a predetermined time has elapsed. Therefore, if the temperature detection value of the temperature detection means stays within a predetermined low temperature range (for example, near normal temperature) even after a predetermined time has elapsed since the start of heating, is the temperature detection means short-circuited or disconnected? Alternatively, it is considered that the temperature is not normally detected due to circumstances such that the object to be heated is not in contact with the temperature detecting means. Therefore, according to this characteristic configuration, when an abnormality has occurred in any one of the first temperature detection unit and the second temperature detection unit, the abnormality can be accurately detected.

  The sixth feature configuration of the combustion heating apparatus according to the present invention is that, in addition to any of the first feature configuration to the fifth feature configuration, the temperature detection means is a non-contact temperature sensor or a contact temperature sensor. It is in.

  According to this characteristic configuration, the temperature detecting means is, for example, a non-contact type temperature sensor including an infrared intensity detecting element that detects infrared intensity through a light transmission window located below the object to be heated, or the object to be heated. Can be configured as a contact-type temperature sensor made of a thermocouple provided in Gotoku.

Schematic which shows the installation state of the stove which concerns on 1st Embodiment Schematic configuration diagram of a stove according to the first embodiment Longitudinal cross section of infrared intensity detector Figure showing the infrared radiation intensity spectrum distribution emitted from the flame The figure which shows the relationship between the temperature of a to-be-heated material, and the output of an infrared intensity detection part The figure which shows the relationship between the temperature of to-be-heated material and the output ratio of an infrared intensity detection part Flow chart showing processing for estimating temperature of object to be heated or determining abnormality of temperature detecting means when heating object to be heated The graph which shows the temperature detection value of the temperature detection means with normal operation, and the temperature detection value of the temperature detection means with abnormal operation Schematic configuration diagram of a stove according to the second embodiment Schematic configuration diagram of a stove according to another embodiment

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[Configuration of stove according to the present invention]
FIG. 1 shows a schematic view of a built-in stove 100A configured as a combustion heating apparatus according to the present invention. The stove 100A includes three stove burners 101 and a grill 102, and is provided in an installation unit 104 opened in a counter 103 of the system kitchen.

  As shown in FIG. 2, each of the burner parts 101 has a flat top plate 1 made of a material having heat resistance, and five virtues 2 on which an object to be heated N such as a pot for cooking an object to be heated can be placed. , A gas combustion burner 3 as a heating means for heating the article N to be heated placed on the virtues 2, and a combustion control unit 4 as a control means for controlling the operation of the burner 3, based on human operation And an operation section 5 as a heating state adjusting means for adjusting the amount of heating of the article N to be heated by instructing the combustion control section 4 an ignition command, a fire extinguishing command, a heating power adjustment command, and the like. Configured.

  The burner 3 is a Bunsen combustion type burner, and a gas nozzle 7 for ejecting a fuel gas G supplied through a fuel supply path 6, the fuel gas G is ejected from the gas nozzle 7, and the fuel gas G is ejected. A mixing pipe 8 to which combustion air A is supplied by the accompanying suction action, and a burner main body 10 provided with a plurality of flame ports 9 for jetting the air-fuel mixture supplied from the mixing pipe 8 radially outward. The burner body 10 is exposed upward through an opening 11 formed in the top plate 1. And it is comprised so that the to-be-heated material N may be heated by combusting the air-fuel | gaseous mixture injected from the flame opening 9, and forming the flame F. The fuel supply path 6 is provided with a fuel supply intermittent valve 12 for intermittently supplying the fuel gas G to the gas nozzle 7 and a fuel supply amount adjusting valve 13 for adjusting the supply amount of the fuel gas G to the gas nozzle 7. It is done. Although not shown, an ignition igniter and a thermocouple for confirming the ignition state of the burner 3 are provided in the vicinity of the flame opening 9 of the burner 3.

  The combustion control unit 4 executes an ignition process for igniting the burner 3 when an ignition command is commanded by the operation unit 5. That is, the fuel supply intermittent valve 12 is opened, the gas supply amount in the fuel supply amount adjustment valve 13 is adjusted to the ignition supply amount, the igniter is operated to ignite the burner 3, and the thermocouple is ignited When the condition is confirmed, the igniter stops operating. Further, when a heating power adjustment command is commanded by the operation unit 5 after the burner 3 is ignited, the combustion control unit 4 changes and adjusts the gas supply amount in the fuel supply amount adjustment valve 13 based on the heating power adjustment command. And the combustion control part 4 will perform the fire extinguishing process of the burner 3, if the fire extinguishing command is commanded by the operation part 5. That is, the fuel supply intermittent valve 12 and the fuel supply amount adjustment valve 13 are closed to stop the supply of the fuel gas G, and the combustion of the burner 3 is stopped.

And in this stove 100A, the infrared intensity detection part 40 which detects the intensity | strength of the infrared rays emitted from the to-be-heated material N located in the downward side of the top plate 1, and the infrared rays detected by the infrared intensity detection part 40 And a temperature detecting unit 50 that detects the temperature of the object N to be heated based on the intensity of the light. The infrared intensity detection unit 40 and the temperature detection unit 50 are small fire heating in which the object to be heated N is heated in a small fire heating state with a small heating amount at two locations on each of the three stove burner units 101 of the stove 100A. First temperature detection means 30A (40A, 50A) for detecting the temperature of the part, and second temperature detection means 30B for detecting the temperature of the large fire heating part where the heated object N is heated in the large fire heating state with a large heating amount ( 40B, 50B). And the said infrared intensity detection part 40 (40A, 40B) is comprised so that the infrared intensity about two mutually different wavelength ranges in the infrared rays radiated | emitted from the to-be-heated material N may be detected, and the said temperature detection part 50 ( 50A, 50B) is a relationship between the infrared intensity for each of the two wavelength ranges detected by the infrared intensity detector 40 (40A, 40B), specifically, the ratio of the infrared intensity for each of the two wavelength ranges. Based on this, the temperature detection values T _A and T _B of the object N to be heated in the small fire heating part and the large fire heating part are detected. Further, the infrared intensity detection unit 40 is configured to detect infrared intensity in a wavelength range set within a range where there is no radiation from the flame of the burner 3 in the infrared wavelength range or the radiation intensity is weak. .

  As shown in FIG. 1 and FIG. 2, in each of the three stove burner portions 101, light is emitted in the vertical direction at a position near the outer peripheral side of the burner body 10 on the top plate 1 and a position slightly away from the position. Two light transmission windows 14 (14A, 14B) made of a light transmissive member are formed in a state where the light is transmitted. The light transmission window 14 is made of a light transmissive material different from the material constituting the top plate 1. The two light transmission windows 14A and 14B each have a small fire heating portion where the object to be heated is heated in a small fire heating state with a small heating amount, and the heating object is heated in a large fire heating state with a large heating amount. In the large fire heating part, it is formed at a position that allows infrared rays radiated from the object N to be heated, and the infrared intensity detectors 40A and 40B are respectively below the light transmission windows 14A and 14B, And it is provided in the side part of the said burner main body 10, and it is comprised so that the intensity | strength of the infrared rays radiated | emitted from the to-be-heated material N and having passed through the light transmission windows 14A and 14B may be detected. That is, the infrared intensity detectors 40A and 40B are radiated from the bottoms of the small fire heating part and the large fire heating part of the heated object N placed and supported by Gotoku 2, respectively, and passed through the light transmission windows 14A and 14B. It is configured to receive the intensity.

[Detection of temperature of object to be heated by temperature detection means]
The infrared intensity detection unit 40 (40A, 40B) and the temperature detection unit 50 (50A, 50B) are configured to be provided separately for each of the three combo burner units 101. Since what is provided for each 101 has the same configuration, in the following description, one of the three provided separately will be described as a representative.

First, the configuration of the infrared intensity detector 40 (40A, 40B) will be described.
As shown in FIG. 3, the infrared intensity detection unit 40 includes two bandpass filters 41a and 41b having different wavelength ranges of infrared rays to pass through, and infrared rays that have passed through the two bandpass filters 41a and 41b. Two infrared detection elements 42a and 42b that are separately detected are configured to detect infrared intensities in two different wavelength ranges in the infrared rays radiated from the object N to be heated. . Incidentally, the bandpass filters 41a and 41b are configured to selectively transmit only infrared rays in a predetermined wavelength range.

  In other words, the two infrared detection elements 42a and 42b are provided side by side in a packaging 43 having a light incident opening 44 so that infrared light incident through the opening 44 can be detected. One band pass filter 41a is provided in a portion where the infrared ray is incident on one infrared detection element 42a in the opening 44, and the other portion is provided in a portion where the infrared ray is incident on the other infrared detection element 42b in the opening 44. A band pass filter 41b is provided. In the packaging 43, a drive unit 45 for driving the two infrared detection elements 42a and 42b is provided. Further, a cover member 46 capable of transmitting infrared rays is provided so as to cover the entire surface of the two band-pass filters 41a and 41b, and the two band-pass filters 41a and 41b are provided by the cover member 46. Is configured to protect.

Next, how to set the two wavelength ranges will be described.
FIG. 4 shows the infrared radiation intensity spectrum distribution emitted from the flame formed by the actual burner 3. As is clear from this figure, the infrared wavelength range is 1.5 μm or more and 1.8 μm or less, 2.0 μm or more and 2.4 μm or less, 3.1 μm or more and 4.2 μm or less. In the range of 8.0 μm or more and 12.0 μm or less, there is no radiation from the flame or the radiation intensity is weak.
Therefore, the two wavelength ranges are within a range of 1.5 μm to 1.8 μm, within a range of 2.0 μm to 2.4 μm, within a range of 3.1 μm to 4.2 μm, and 8 By setting within the range of 0.0 μm or more and 12.0 μm or less, the two wavelength ranges are set within a range where there is no radiation from the flame of the burner 3 in the infrared wavelength range or the radiation intensity is weak. However, in this embodiment, for example, the two wavelength ranges are set to different wavelength ranges within a range of 3.1 μm to 4.2 μm.

Next, the infrared detection elements 42a and 42b will be described.
Infrared detectors 42a and 42b configured using PbS (lead sulfide) or PbSe (lead selenide) as an infrared cell emit infrared rays in the range of 1.5 μm to 5.0 μm at an operating temperature of normal temperature (300K). Further, the sensitivity to infrared rays within the range of 3.1 μm or more and 4.2 μm or less is relatively high and the detection output is large.
Therefore, as described above, when the two wavelength ranges are set within the range of 3.1 μm or more and 4.2 μm or less, the infrared detection elements 42a and 42b are made of PbS (lead sulfide) or PbSe (lead selenide). Is preferably used as an infrared cell. Further, as the infrared detecting elements 42a and 42b, a power raising element, a thermopile or the like can be used in addition to the above materials.

Next, a process for obtaining the temperature detection values T _A and T _B of the heated object N at the positions of the temperature detection units 50A and 50B by the temperature detection unit 50 (50A and 50B) will be described. In the following description, the two wavelength regions are denoted by λ1 and λ2. Incidentally, the wavelength region λ2 is longer than the wavelength region λ1.
FIG. 5 shows the relationship between the temperature of the object N to be heated obtained in advance by experiments and the output values (corresponding to the infrared intensity) for the two wavelength regions λ1 and λ2 in the infrared intensity detector 40. The relationship shown in FIG. 5 is obtained by using an object to be heated having an emissivity (emissivity) of 0.92.

  FIG. 6 shows an output ratio (the ratio between the temperature of the object to be heated N and the output value corresponding to the wavelength region λ1 and the output value corresponding to the wavelength region λ2 in the infrared intensity detector 40 (40A, 40B)). The relationship between the temperature and the infrared intensity ratio shown in FIG. 6 is as follows. It is what I asked for.

  That is, for each of a plurality of heated objects having different emissivities, the output ratio is obtained for each of the plurality of temperatures by changing the temperature of the heated object to a plurality of temperatures. Then, based on the data obtained for a plurality of objects to be heated with different emissivities ε, an approximate expression of the relationship between the temperature and the output ratio is obtained, and the obtained approximate expression is related to the relationship between the temperature and the infrared intensity ratio. It is as. Therefore, the relationship between the temperature-to-infrared intensity ratios of the heated objects N having various emissivities ε can be made into a common temperature-to-infrared intensity ratio relationship. The relationship between the temperature and infrared intensity ratio as shown in FIG. 6 obtained in this way is stored in the storage unit (not shown) of the temperature detection unit 50.

The temperature detection unit 50 (50A, 50B) outputs an output ratio between the output value corresponding to the wavelength region λ1 and the output value corresponding to the wavelength region λ2 in the infrared intensity detection unit 40 (40A, 40B). And the temperature detection values T _A and T _B of the object N to be heated at the positions of the temperature detection units 50A and 50B are obtained from the stored relationship between the temperature and infrared intensity ratio. By taking such a ratio of the output values, the temperature detection values T _A and T _B of the heated object N at the positions of the temperature detecting units 50A and 50B are not dependent on the emissivity of the heated object N. It can be detected accurately. Then, the temperature detection values T _A and T _B of the object to be heated N at the positions of the temperature detection units 50A and 50B obtained by the temperature detection units 50A and 50B are output to the combustion control unit 4 to be described later. It is used for estimation of the temperature T of the object N ([FIG. 7] S4).

Incidentally, in the case where the wavelength range is set in the range of 1.5 μm or more and 1.8 μm or less, as the translucent member constituting the light transmission window 14, for example, ordinary glass, crystal Glass fluoride, quartz, sapphire, CaF ₂ (calcium fluoride), MgF ₂ (magnesium fluoride), ZnSe (zinc selenide), Si (silicon), Y ₂ O ₃ (yttrium oxide), or the like can be used. In addition, when the wavelength range is set in the range of 2.0 μm to 2.4 μm, various materials exemplified in the range of 1.5 μm to 1.8 μm can be used. Apart from that, Ge (germanium) can also be used.

When the wavelength range is set in the range of 3.1 μm or more and 4.2 μm or less, crystallized glass, quartz, sapphire, CaF ₂ , MgF ₂ , ZnSe, Si, Y ₂ O _3, etc. Can be used. When the wavelength range is set within a range of 8.0 μm to 12 μm, CaF ₂ , MgF ₂ , ZnSe, Si, Ge, Y ₂ O ₃ , polyethylene resin, or the like can be used.

[Estimation of temperature of object to be heated and judgment of abnormality of temperature detection means]
After a predetermined time t has elapsed from the start of heating, the combustion control unit 4 performs temperature detection with the first temperature detection means 30A and the second temperature detection means 30B, and the first temperature detection means 30A and the second temperature detection means 30B. Determine if is working properly.
When the first temperature detecting means 30A and the second temperature detecting means 30B is determined to be operating together properly, the detected temperature value T _A of the first temperature detecting means 30A and the second temperature detecting means 30B detects , T _B is used to estimate the temperature T of the object N to be heated.
On the other hand, when it is determined that one or both of the first temperature detection means 30A and the second temperature detection means 30B are not operating normally, the user is notified.

This will be described with reference to the flowchart of FIG. When a predetermined time t has elapsed from the start of heating (S1), the combustion control unit 4 uses the first temperature detection means 30A to set the temperature of the small fire heating part and the second temperature detection means 30B to set the temperature of the large fire heating part, respectively. The temperature detection values T _A and T _B are detected (S2). Then, it is determined whether or not the detected temperature detection values T _A and T _B are included in a predetermined temperature range θ (for example, a range of 80 ° C. to 250 ° C.) (S3).
When the temperature detection values T _A and T _B are both included in the predetermined temperature range θ (S3: Yes), it is determined that both the first temperature detection means 30A and the second temperature detection means 30B are operating normally. Then, based on the temperature detection values T _A and T _B , the temperature T of the object to be heated N is estimated by the temperature estimation means 60 (S4).
On the other hand, it not included on either one or both are given temperature range θ detected temperature value T _A and T _B (S3: No), moreover, the low temperature the temperature detection value T _A and T _B is given When the temperature is in the side temperature range θ _L (for example, a range of 0 ° C. to 50 ° C.), it is determined that the operation of the temperature detecting means 30 that detects the detected temperature value is abnormal (S5).

  The determination (S3) of abnormality of the temperature detection means based on the comparison between the temperature detection value and a predetermined temperature range will be described using the graph of FIG. The temperature detection means 30 includes a first temperature detection means 30A for detecting the temperature of the small fire heating part and a second temperature detection means 30B for detecting the temperature of the large fire heating part, but the abnormality determination method is the same. Therefore, in the following, a method for determining abnormality of the first temperature detection unit 30A will be described.

Graph of Figure 8, time course of the detected temperature value T _A of the first temperature detecting means 30A are operating normally (the graph a, b, c) and the temperature of the working abnormal first temperature detecting means 30A shows change with time of the detected value T _a (the graph d). In this example, “operation is abnormal” in (graph d) is that dirt is attached to the light transmission window 14A, and infrared rays radiated from the bottom of the small fire heating portion of the article N to be heated are infrared rays. This is because the intensity detector 40A is not normally receiving light.

Description will be made in order from the graph a. Graph a, when heating the cooking vessel containing an object to be heated N near room temperature such as water, is the change over time of the temperature detection value T _A of the first temperature detecting means 30A which is normally operated is detected . As described above, the first temperature detecting means 30A is detects a temperature detection value T _A of the small fire heating portion of the heated object N, the heated object N near room in the cooking vessel has entered, the detected temperature value T _a of the first temperature detecting means 30A when the burner 3 is ignited (time "0") is substantially equal to room temperature. Then, the detected temperature value T _A of the first temperature detecting means 30A has reached elevated already at a predetermined temperature range θ after elapse from the start of heating of the predetermined time t with the heated object N is heated .

Next, the graph b will be described. Graph b, when heating the object to be heated N cold such as frozen food, a change with time of the temperature detection value T _A of the first temperature detecting means 30A which is normally operated is detected. When the frozen object N is heated, heating is started immediately after the frozen object N is charged. Moreover, since the frozen to-be-heated object N is almost solid, air enters between the to-be-heated object N and a cooking container, and the heat transfer from the to-be-heated object N to a cooking container is inhibited. Therefore, when the burner 3 is ignited (time “0”), the temperature of the heated object N has not been transferred to the bottom of the cooking container. Therefore, the temperature detection value T _A of the first temperature detection means 30A at the time of ignition is approximated to the temperature of the cooking container before the object to be heated N is charged, and is close to room temperature. Temperature detection value T _A of the first temperature detecting means 30A, the time elapses, the temperature of the frozen article to be heated N together with the heat is transferred to the cooking vessel, once lowered. But then, due to the heating by the burner 3, the temperature detection value T _A of the first temperature detecting means 30A rises, after a predetermined time t from the start of heating, already reaches a predetermined temperature range theta.

Subsequently, the graph c will be described. Graph c, when a previously given further an object to be heated N which is heated in the temperature range θ heating, over time the change in the detected temperature value T _A of the first temperature detecting means 30A which is normally operated is detected is there. Since the heated object N is being heated in advance within a predetermined temperature range theta, temperature detection value T _A of the first temperature detecting means 30A when the burner 3 in this case has been ignited (time "0"), the It is within a predetermined temperature range θ. Temperature detection value T _A of the first temperature detecting means 30A may over time, but increases with the heated object N is heated, the heated object N is heated in advance in the predetermined temperature range θ Therefore, the rising speed is slow, elapses after the start of heating of the predetermined time t is also the temperature detection value T _a remains within a predetermined temperature range theta.

Next, the graph d will be described. In the graph d, since the dirt is attached to the light transmission window 14A, the first temperature detection is performed in a state where the infrared ray radiated from the bottom of the small fire heating part of the object N is not normally received by the infrared intensity detection unit 40A. It means 30A is a temporal change of the detected temperature value T _a to be detected. In such a state, even if the article to be heated N is heated by the burner 3, the first temperature detection means 30A continues to detect a substantially constant temperature. This is because, since the dirt on the light transmission window 14A is attached, the first temperature detecting means 30A is an infrared for detecting the temperature detection value T _A, had not been appropriately received by the infrared intensity detecting unit 40A It is. In such a case, the temperature detection value T _A is also passed since the start of heating the predetermined time t does not reach a predetermined temperature range theta.

  As described above, when the first temperature detection unit 30A is operating normally, the temperature detection value reaches the predetermined temperature range θ around the predetermined time t from the start of heating (graph). a, b, c). On the other hand, when the operation is abnormal, the temperature detection value may not reach the predetermined temperature range θ even when the predetermined time t has elapsed from the start of heating (graph d). Therefore, the temperature detection value after a predetermined time t has elapsed from the start of heating can be used to determine whether the temperature detection means 30A is operating normally. The determination of the abnormality of the temperature detection means (S3) based on the comparison between the temperature detection value and the predetermined temperature range is based on such background.

  Note that the “predetermined time t from the start of heating” and “predetermined temperature range θ” vary depending on the region of use, the intended use, etc. It can be set as appropriate. For example, in this embodiment, it is set in the range of 80 ° C. to 250 ° C. for 5 minutes.

Next, the estimation (S4) of the temperature T of the article N to be heated will be described.
As shown in FIG. 7, the estimation of the temperature T of the object to be heated N (S4) is performed by determining whether the temperature detecting means 30 is abnormal (S3) based on a comparison between the temperature detection values T _A and T _B and a predetermined temperature range θ. ) Is performed when it is determined that both the first temperature detection means 30A and the second temperature detection means 30B are operating normally (S3: Yes).
Temperature estimating means 60, a heating amount adjusted by the operation unit 5, on the basis of the detected temperature value T _B of the detected temperature value T _A and the second temperature detection means 30B of the first temperature detecting means 30A, the object to be heated N Storage means 65 that stores relationship information p that can estimate the temperature T of the object. The temperature estimation means 60 estimates the temperature T of the object N to be heated using the relationship information p.

The relationship information p is a coefficient in the range of 0 ≦ p ≦ 1, for example. In association with the heating amount adjusted by the operation unit 5, p is set closer to 0 as the heating amount is smaller, and p is closer to 1 as the heating amount is larger. Temperature estimating means 60, by using the set relationship information p thus, on the basis of the detected temperature value T _B of the detected temperature value T _A and the second temperature detection means 30B of the first temperature detecting means 30A, the The temperature T of the heated object N is estimated by the following equation.
T = (1−p) × T _A + p × T _B

According to the above equation, the relationship information p is a coefficient that is closer to 0 as the heating amount is smaller, and closer to 1 as the heating amount is larger. Therefore, the smaller the heating amount, the smaller the heating by the first temperature detection means 30A. The specific gravity is put on the temperature detection value T _A of the part, and the temperature T of the article N to be heated is estimated by putting the specific gravity on the temperature detection value T _B of the large fire heating part by the second temperature detection means 30B as the heating amount increases. .
According to the lightness of the specific gravity of the temperature detection values T _A and T _B based on such heating amount, the estimated value of the temperature T of the object to be heated N based on the above equation appropriately reflects the heating amount and the properties of the heated part. Will be. That is, in the stove 100A, the amount of the fuel gas G supplied to the flame F varies depending on the amount of heating in the stove 100A. Therefore, when the amount of heating is small, the flame F is best applied to the central portion of the bottom of the article N However, when the heating amount is large, the heating amount and the property of the heating portion that best hits the outer peripheral side portion and the peripheral wall portion of the bottom of the heated object N are appropriately reflected. Can be estimated well.

Note that the setting of the relationship information p described above and T = (1−p) × T _A + p × T _B shown as an estimation formula for the temperature T of the object N to be heated are merely examples, and can be appropriately modified. . For example, the relationship information p may be a value determined in relation to not only the heating amount but also the heating amount and the time from the start of heating. Moreover, it is good also as a structure which estimates the temperature T of the to-be-heated material N, without using the relationship information p. For example, the temperature T, the average and the detected temperature value T _A and T _B, may be estimated as a high detection value or low detection value of the temperature of the temperature detection value T _A and the detected temperature value T _B.

Next, determination of abnormality of the temperature detection means (S5) will be described.
As shown in FIG. 7, the abnormality determination of the temperature detection means (S5), the result of abnormality determination of the temperature detection means based on the comparison between the detected temperature value and a predetermined temperature range (S3), the detected temperature value T _A And T _B , or both of them are not included in the predetermined temperature range θ (S3: No).
If the burner 3 is operating normally, the predetermined time t has elapsed from the start of heating, both the temperature detection value T _B of the detected temperature value T _A and the second temperature detection means 30B of the first temperature detecting means 30A is By heating with the flame F, it should have risen within a predetermined temperature range θ. Therefore, if one or both of the temperature detection values T _A and T _B have not reached the temperature range θ even after a predetermined time t has elapsed since the start of heating, the temperature detection means 30A and 30B are informed. Some abnormality may have occurred. In particular, when the temperature detection values T _A and T _B remain in the predetermined low temperature side temperature range θ _L , the temperature detection means 30A and 30B that detect the temperature detection values T _A and T _B are short-circuited or disconnected. There is a possibility that the temperature cannot be normally detected due to a failure or a situation in which the object to be heated is not in contact with the temperature detecting means 30A, 30B. By performing abnormality determination based on such a temperature range θ, it is possible to appropriately determine abnormality of the temperature detection means 30 (30A, 30B) (S5).

Note that the “low temperature side temperature range θ _L ” in this case takes into consideration the case where the temperature T of the article to be heated N is not detected by the temperature detection means 30 and the temperature detection means 30 simply detects the room temperature. In this embodiment, for example, the temperature is set in a range of 0 ° C. to 50 ° C. including room temperature. This “low temperature side temperature range θ _L ” is also different from the room temperature, as well as the room temperature, the optimum value differs depending on the type of object to be heated, cooking container, heating amount, etc. It may be configured so that it can be set as appropriate.

  When the stove 100A determines that the temperature detecting means 30 is abnormal as described above, the stove 100A turns on the abnormality notification lamp 18 provided on the front operation panel 105 to notify the user of the occurrence of the abnormality. An abnormality notification lamp 18 is provided for each of the three combustor units 101. As shown in FIG. 1, the abnormality notification lamp 18 is provided, for example, in the vicinity of the operation unit 5 for each of the three stove burner units 101 in the front operation panel 105 in the stove 100A. When the abnormality notification lamp 18 is turned on, the user can easily recognize that the temperature detecting means 30 of the corresponding combustor unit 101 is determined to be abnormal.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In the second embodiment, since the configuration other than the temperature detection unit 30 is the same as that of the first embodiment, only the configuration of the temperature detection unit 30 will be described, and the description of the other will be omitted.

  FIG. 9 is a schematic configuration diagram of a stove 100B according to the second embodiment. The stove 100B is the same as the stove 100A according to the first embodiment except that the temperature detection means 30 configured as a non-contact temperature sensor by the infrared intensity detection unit 40 (40A, 40B) and the temperature detection unit 50 (50A, 50B) The thermocouples 40a and 40b are arranged as two contact-type temperature sensors at two locations of the small fire heating part and the large fire heating part.

In the stove 100B according to the second embodiment, the thermocouples 40a and 40b are brought into contact with the bottom of the heated object N placed on the Gotoku 2, and the small fire heating part and the large fire heating part of the heated object N The temperatures T _a and T _b at the bottom of the are detected. Then, the temperatures T _a and T _b of the bottom portion of the small fire heating part and the large fire heating part of the heated object N obtained by the thermocouples 40a and 40b are output to the combustion control unit 4, and the stove according to the first embodiment. Similar to 100A, it is used for estimation of the temperature T of the object N to be heated, determination of the operating state of the temperature detection means 30 (30a, 30b), and the like.

[Another embodiment]
Hereinafter, another embodiment of the present invention will be described.

(1) In the above embodiment, the light transmission window 14 is exemplified as one window made of one light transmissive member, but instead of such a structure, for example, as shown in FIG. Two window portions 14a respectively formed of different types of translucent members, corresponding to the light transmission portions for the infrared detection elements in the two wavelength ranges λ1 and λ2 in the embodiment, respectively. The light transmission window 14 may be configured by 14b. In this configuration, the directivity when receiving infrared rays with respect to each of the infrared detection elements 42a and 42b is provided, and the infrared rays incident through the corresponding window portion of the two window portions 14a and 14b are identified. It is good to be able to detect properly. Further, as shown in FIG. 10, the infrared incident direction with respect to each infrared detecting element 42a, 42b may be set to an oblique direction instead of the vertical direction as in the first embodiment.

(2) In the above embodiment, a light transmission window made of a translucent material different from the material constituting the top plate is formed on a part of the top plate, but instead of such a configuration, The top plate is configured using a translucent material that transmits infrared rays, for example, crystallized glass, and the outer peripheral edge of the top plate is surrounded by a rectangular reinforcing frame. And it is good also as a structure which forms the said light transmission window by the whole flat plate surface formation location enclosed by the frame for the reinforcement.

(3) In the above embodiment, the infrared intensity detection means includes two infrared detection elements 42a and 42b that individually detect the infrared rays that have passed through the two bandpass filters 41a and 41b. Although it was configured to detect the infrared intensity for each of the two different wavelength ranges in the emitted infrared, instead of such a configuration, two band-pass filters are alternately provided for one infrared detection element. The position may be switched so as to act, and the infrared intensity in different wavelength ranges may be detected using the detection value of the infrared detection element in each of the switched states.

(4) In the above embodiment, the temperature detection means 30 determines the temperature T based on the ratio of the infrared intensity for each of the two wavelength ranges as the temperature T of the object to be heated N. Instead of the configuration, the following configuration may be used.
For example, by using a plurality of objects to be heated N having different emissivities in advance, the temperatures T of the objects to be heated N are changed to a plurality of temperatures, and for each of the plurality of temperatures, the infrared intensity for each of the plurality of wavelength ranges. Infrared intensity for each of the plurality of wavelength ranges obtained in this way is stored as map data in a state corresponding to each of the plurality of temperatures. Then, from the map data, an infrared intensity relationship that matches or is similar to the infrared intensity relationship for each of the plurality of wavelength regions detected by the infrared intensity detection means is determined, and the determined infrared intensity relationship A corresponding temperature is obtained, and the obtained temperature is set as the temperature T of the article N to be heated.
Incidentally, in this case, the plurality of wavelength ranges may be two wavelength ranges as in the above embodiment, or may be three or more wavelength ranges.

(5) In the above embodiment, the temperature estimation means 60, the heating amount was adjusted by heating conditioning means and the detected temperature value T _B of the detected temperature value T _A and the second temperature detection means 30B of the first temperature detecting means 30A based on, but illustrates the configuration of estimating the temperature T of the heated object N by using the relation information p, temperature estimation unit 60, the detected temperature value T _a and the second temperature detection of the first temperature detecting means 30A while the temperature detection value T _B means 30B, it may constitute a temperature detection value of the temperature is high side to estimate the temperature T of the heated object N.
If the safety control is performed based on the temperature T of the object N thus estimated, the safety control can be performed based on the temperature detection value on the high temperature side with a higher degree of danger. Safer and safer safety control can be realized.

(6) In the above embodiment, the configuration in which the operating state of the temperature detecting unit 30 is determined based on the temperature detection value is exemplified. However, for example, in the first embodiment, the light transmission window 14 is dirty. It is good also as a structure which is equipped with the stain | pollution | contamination state detection means which detects whether it is, and determines that the action | operation of the temperature detection means 30 is abnormal when the light transmission window 14 is detected as a dirt state.

(7) In the above embodiment, when the temperature detection unit 30 is determined to be abnormal, the abnormality notification lamp 18 notifies the user of the abnormality determination. However, the notification to the user is merely an example. . Instead of notifying the user or in addition to notifying the user, for example, based on the temperature T of the article N to be heated estimated by the temperature estimating means 60, the fuel supply intermittent valve 12, the fuel supply As a configuration for controlling the operation of the heating means, such as automatic control of the temperature T of the heated object N or emergency stop control when the heated object N is overheated by controlling the amount adjusting valve 13 or the like. Also good.

(8) In the above embodiment, the configuration in which the abnormality notification lamp 18 notifies the user of the abnormality determination is illustrated, but the abnormality notification lamp 18 is only an example. For example, you may comprise with the buzzer and speaker which alert | report abnormality by an audio | voice.

3 Burner (heating means)
5 Operation part (heating state adjustment means)
30 Temperature detection means 30A First temperature detection means 30B Second temperature detection means 40, 40A, 40B Infrared intensity detection unit (temperature detection means)
40a, 40b Thermocouple (temperature detection means)
50, 50A, 50B Temperature detection unit (temperature detection means)
60 Temperature estimation means 65 Storage means 100 Combustion heating apparatus 100A, 100B Stove (combustion heating apparatus)
N heated object

Claims (6)

Heating means for heating an object to be heated;
Temperature detecting means for detecting the temperature of a specific part of the object to be heated;
Temperature estimation means for estimating the temperature of the heated object based on the temperature of the specific part of the heated object detected by the temperature detecting means,
A combustion-type heating device in which a small fire heating part where the object to be heated is heated in a small fire heating state with a small heating amount and a large fire heating part where the object to be heated is heated in a large fire heating state with a large heating amount There,
As the temperature detection means, first temperature detection means for detecting the temperature of the small fire heating part,
Second temperature detecting means for detecting the temperature of the large fire heating part,
A combustion heating apparatus in which the temperature estimation means estimates the temperature of the object to be heated based on a temperature detection value of the first temperature detection means and a temperature detection value of the second temperature detection means. A heating state adjusting means for adjusting a heating amount of the object to be heated;
A relationship in which the temperature of the object to be heated can be estimated based on the heating amount adjusted by the heating state adjusting unit, the temperature detection value of the first temperature detection unit, and the temperature detection value of the second temperature detection unit. Storage means for storing information,
The combustion type heating apparatus according to claim 1, wherein the temperature estimation unit estimates the temperature of the object to be heated using the relationship information.   The temperature estimation unit estimates a temperature detection value on a higher temperature side as a temperature of the object to be heated, one of a temperature detection value of the first temperature detection unit and a temperature detection value of the second temperature detection unit. Item 2. A combustion heating apparatus according to Item 1.   On the condition that the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means are within a predetermined temperature range, the temperature estimation means detects the temperature of the first temperature detection means. The combustion heating apparatus according to any one of claims 1 to 3, wherein a temperature of the object to be heated is estimated based on a value and a temperature detection value of the second temperature detection means.   When one or both of the temperature detection value of the first temperature detection means and the temperature detection value of the second temperature detection means remain in a predetermined low temperature range even after a predetermined time has elapsed since the start of heating. Furthermore, the combustion-type heating apparatus as described in any one of Claims 1-4 which judges that the temperature detection means which detected the said temperature detection value is abnormal.   The combustion type heating device according to any one of claims 1 to 5, wherein the temperature detection means is a non-contact temperature sensor or a contact temperature sensor.

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