CN112303678B - Infrared temperature measuring device and gas stove using the same - Google Patents
Infrared temperature measuring device and gas stove using the same Download PDFInfo
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- CN112303678B CN112303678B CN201910709856.9A CN201910709856A CN112303678B CN 112303678 B CN112303678 B CN 112303678B CN 201910709856 A CN201910709856 A CN 201910709856A CN 112303678 B CN112303678 B CN 112303678B
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000003373 anti-fouling effect Effects 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 27
- 238000002310 reflectometry Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000010411 cooking Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Radiation Pyrometers (AREA)
Abstract
本发明涉及一种红外测温装置及使用有该红外测温装置的燃气灶，其中红外测温装置，包括用于测量温度的红外测温传感器，其特征在于：还包括壳体，所述红外测温传感器安装在壳体内，壳体表面开有透射孔，透射孔内设有能透射红外光的防污片，壳体内设有与透射孔连通的检测通道，红外测温传感器设置在检测通道内；检测通道笔直且与水平面之间具有夹角α，18°＜α＜23°；检测通道内还设有位于红外测温传感器前方的用于提高红外测温传感器测量距离的准直镜。与现有技术相比，本发明不需要在燃烧器内环开孔，能够减少大部分的火焰辐射干扰，保障红外测温传感器能够在火焰干扰条件下仍具有稳定的测量结果和较为准确的测试精度。
The present invention relates to an infrared temperature measuring device and a gas stove using the infrared temperature measuring device, wherein the infrared temperature measuring device includes an infrared temperature measuring sensor for measuring temperature, and is characterized in that: it also includes a shell, the infrared temperature measuring sensor is installed in the shell, a transmission hole is opened on the surface of the shell, an anti-fouling sheet capable of transmitting infrared light is arranged in the transmission hole, a detection channel connected to the transmission hole is arranged in the shell, and the infrared temperature measuring sensor is arranged in the detection channel; the detection channel is straight and has an angle α with the horizontal plane, 18°＜α＜23°; a collimator is also arranged in the detection channel, which is located in front of the infrared temperature measuring sensor and is used to increase the measuring distance of the infrared temperature measuring sensor. Compared with the prior art, the present invention does not need to open a hole in the inner ring of the burner, can reduce most of the flame radiation interference, and ensure that the infrared temperature measuring sensor can still have a stable measurement result and a relatively accurate test accuracy under the condition of flame interference.
Description
Technical Field
The invention relates to an infrared temperature measuring device and a gas stove using the same.
Background
With the improvement of the living standard of people, the household gas cooker is gradually popularized in China. Excessive combustion of household gas cookers can damage heated cookware and food, and can cause fire, which is a serious hazard for jeopardizing kitchen safety.
Along with the higher and higher requirements of users on cooking experience, intelligent control and cooking safety, how to accurately measure the temperature of food in the cooker, further realize preventing food from being burned dry, realize intelligent reminding function of intelligent menu is an important research direction at present.
The existing temperature measurement modes of food in the cooker of the gas cooker mainly comprise bottom NTC temperature measurement, infrared temperature measurement of the bottom of the cooker, temperature measurement in a probe mode and the like.
The structure of the burner needs to be changed, the inner ring is required to be perforated, the temperature of the bottom of the pan is easy to be uneven, the temperature measurement precision is also influenced by the interference of high-temperature smoke and flame of the inner ring, the adaptability of the pan is poor, such as a concave pan at the bottom, the temperature measurement precision is influenced by a ceramic pan, the infrared temperature measurement of the bottom of the pan still needs to be contacted with the bottom of the pan, the structure of the burner also needs to be changed, the inner ring of the burner is required to be perforated, the lens is easy to be influenced by greasy dirt, the inaccurate temperature measurement result is easy to be caused by long-term practicality, and the temperature measurement precision is also easy to be influenced by the high-temperature smoke and flame of the bottom of the pan.
Disclosure of Invention
The invention aims to provide an infrared temperature measuring device with low cost and no need of changing the structure of a burner aiming at the prior art.
The invention further aims to solve the technical problem of providing a gas stove using the infrared temperature measuring device.
The invention solves the above-mentioned technical problems by adopting a technical scheme that the infrared temperature measuring device comprises an infrared temperature measuring sensor for measuring temperature and is characterized by further comprising a shell, wherein the infrared temperature measuring sensor is arranged in the shell, a transmission hole is formed in the surface of the shell, an anti-fouling sheet capable of transmitting infrared light is arranged in the transmission hole, a detection channel communicated with the transmission hole is arranged in the shell, the infrared temperature measuring sensor is arranged in the detection channel, the detection channel is straight and has an included angle alpha between 18 degrees < alpha <23 degrees with the horizontal plane, and a collimating mirror which is positioned in front of the infrared temperature measuring sensor and used for improving the measuring distance of the infrared temperature measuring sensor is also arranged in the detection channel.
As an improvement, the inner wall of the detection channel is provided with a black coating.
And further improving, a gap of 10-15 mm is formed between the infrared temperature measurement sensor and the collimating mirror.
Still be equipped with the pan emissivity measurement module in the casing again, this pan emissivity measurement module is including the infrared LED transmitting tube and the infrared LED receiving tube that pair set up to and the reflectance calculation module who is connected with infrared LED transmitting tube and infrared LED receiving tube electricity.
The infrared LED lamp is characterized in that a first mounting hole for mounting the infrared LED emitting tube and a second mounting hole for mounting the infrared LED receiving tube are formed in the shell, the first mounting hole and the second mounting hole are formed in the same side of the transmitting hole, antifouling glass is arranged on the outer surfaces of the first mounting hole and the second mounting hole, the arrangement direction of the first mounting hole meets the condition that a measuring point of the infrared LED emitting tube falls on the outer wall of a measured object, and the arrangement direction of the second mounting hole meets the condition that the infrared LED receiving tube can receive infrared light emitted by the infrared LED emitting tube and reflected back by the measured object.
The infrared LED emitting tube is positioned at the focus of the paraboloid on the inner wall of the first reflecting cup; and a second reflecting cup with a parabolic inner wall is arranged in the second mounting hole, and the infrared LED receiving tube is positioned at the focus of the parabolic inner wall of the second reflecting cup.
And an included angle alpha is formed between the lens of the infrared LED transmitting tube and the lens mounting direction of the infrared LED receiving tube and the horizontal plane, and the included angle alpha is 18 degrees < alpha <23 degrees.
Still improve, still include the temperature calculation module that is connected with infrared temperature measurement sensor and reflectivity calculation module in the casing, temperature calculation module is according to the radiant energy P (T) that infrared temperature measurement sensor received and reflectivity calculation module calculated the reaction rate beta of the pot body, calculates the emissivity epsilon=1-beta of the pot body, then according to P (T) =epsilon sigma T 4, calculates the real-time absolute temperature of the bottom of the pot body of being surveyed, wherein T is the absolute temperature of the outer wall of the pot body of being surveyed, and sigma is stell-Boltzmann constant.
And the shell is cuboid or square, and the periphery of the top of the shell is provided with an anti-fouling eave.
The technical scheme includes that the gas stove using the infrared temperature measuring device with the structure comprises a left burner and a right burner, and is characterized in that the infrared temperature measuring device is integrally arranged at the rear of the center line of the left burner and the center line of the right burner and is 250-300 mm away from the left burner or the right burner, and a transmission hole is aligned to the left burner direction or the right burner direction.
Compared with the prior art, the infrared temperature measuring sensor has the advantages that holes are not needed to be formed in the inner ring of the burner, the structure, the smoke efficiency and other performances of the burner are not affected, most of flame radiation interference can be reduced, and the infrared temperature measuring sensor can still have stable measuring results and accurate measuring precision under the flame interference condition.
Drawings
FIG. 1 is a schematic perspective view of an infrared temperature measurement device according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Fig. 3 is a sectional view taken along the direction B-B in fig. 1.
Fig. 4 is a schematic view of a gas stove according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The infrared temperature measuring device shown in fig. 1, 2 and 3 comprises a shell 2 which is approximately square, an anti-fouling eave 26 is arranged around the top of the shell 2, an infrared temperature measuring sensor 1 for measuring temperature is arranged in the shell 2, a transmission hole 21 is formed in one side face of the shell, an anti-fouling sheet 3 capable of transmitting infrared light is arranged in the transmission hole 21, a detection channel 22 communicated with the transmission hole 21 is arranged in the shell 2, the infrared temperature measuring sensor 1 is arranged in the detection channel 22, an included angle alpha is formed between the detection channel 22 and a horizontal plane, the included angle alpha is 18 degrees < alpha <23 degrees, and a collimating mirror 4 which is positioned in front of the infrared temperature measuring sensor 1 and used for improving the measuring distance of the infrared temperature measuring sensor 1 is also arranged in the detection channel 22.
In this embodiment, the collimating lens 4 is a fresnel lens made of high-density polyethylene with higher transmittance in the 5-10um wave band (the wave band can better avoid the highest flame radiation) and lower cost, and the collimating lens 4 has the function of enabling the infrared temperature sensor 1 to have long-distance measurement capability and reducing most of flame radiation interference, so that the infrared temperature sensor 1 can still have stable measurement results and more accurate test precision under the flame interference condition.
The infrared temperature measurement sensor 1 adopts a B-type sensor, a gap of 12mm is formed between the infrared temperature measurement sensor 1 and the collimating mirror 4, the angle of view can be well reduced, and in addition, the inner wall of the detection channel 22 is provided with a black coating 221, so that the reflected radiation interference of the detection channel 22 can be prevented, and the temperature measurement precision of the infrared temperature measurement sensor 1 is affected.
In addition, a boiler emissivity measuring module is further arranged in the shell 2, the boiler emissivity measuring module comprises an infrared LED transmitting tube 5 and an infrared LED receiving tube 6 which are arranged in a matched mode, and a reflectivity calculating module 7 electrically connected with the infrared LED transmitting tube 5 and the infrared LED receiving tube 6, and the calculating principle and the calculating method of the reflectivity calculating module 7 are conventional technologies. The shell 2 is provided with a first mounting hole 23 for mounting the infrared LED emitting tube 5 and a second mounting hole 24 for mounting the infrared LED receiving tube 6, the first mounting hole 34 and the second mounting hole 24 are arranged on the same side of the transmission hole 21, antifouling glass 25 is arranged on the outer surfaces of the first mounting hole 34 and the second mounting hole 24, the arrangement direction of the first mounting hole meets the condition that a measuring point of the infrared LED emitting tube 5 falls on the outer wall of a measured object, and the arrangement direction of the second mounting hole meets the condition that the infrared LED receiving tube 6 can receive infrared light emitted by the infrared LED emitting tube 5 and reflected back through the outer wall of the measured object. The first mounting hole is internally provided with a first reflecting cup 9 with a parabolic inner wall, the infrared LED emitting tube 5 is positioned at the focus of the parabolic inner wall of the first reflecting cup 9, the second mounting hole is internally provided with a second reflecting cup 8 with a parabolic inner wall, and the infrared LED receiving tube 6 is positioned at the focus of the parabolic inner wall of the second reflecting cup 8. An included angle alpha, 18 degrees < alpha <23 degrees is formed between the lens of the infrared LED transmitting tube 5 and the lens mounting direction of the infrared LED receiving tube 6 and the horizontal plane.
In the actual testing process, as the radiation direction characteristic of the surface of the main metal pot (such as a black pot) is diffuse reflection, if the power of the selected infrared LED emitting tube is smaller, the emitted light is more dispersed, and the two conditions (the received radiation energy is too little) of the black pot with high emissivity and the non-pot on the cooking bench are difficult to distinguish. According to the invention, the infrared LED emitting tube 5 and the infrared LED receiving tube 6 are respectively arranged at the parabolic focuses of the first reflecting cup and the second reflecting cup, so that the collimation of emission and the receiving area of the receiver can be enhanced, the problem of insufficient radiation energy is effectively solved, and the emissivity of the cooker is well measured.
In addition, the shell also comprises a temperature calculation module connected with the infrared temperature measurement sensor and the reflectivity calculation module 7, wherein the temperature calculation module calculates the emissivity epsilon=1-beta of the pot body according to the radiant energy P (T) received by the infrared temperature measurement sensor and the reaction rate beta of the pot body calculated by the reflectivity calculation module 7, and then calculates the real-time absolute temperature of the bottom of the pot body to be measured according to P (T) =epsilon sigma T 4, wherein T is the absolute temperature of the outer wall of the pot body to be measured, and sigma is the Stefan-Boltzmann constant.
Compared with the existing infrared temperature measurement mode, the infrared temperature measurement device provided by the invention is not limited by the installation position, does not need to be provided with holes at the inner ring position of the burner, does not need to avoid the fire holes of the burner to avoid the interference of flame radiation, and has no influence on the initial burner structure.
As shown in fig. 4, the infrared temperature measuring device provided by the invention is directly arranged on the gas stove 1, and in the aspect of selecting the setting position and angle of the infrared temperature measuring device, measures are needed to prevent the liquid in the pot from splashing, blocking or polluting and damaging the sensor. Particularly, when the infrared temperature measuring device is arranged close to the cooker, substances in the cooker are prevented from blocking the observation port of the sensor. The use temperature range of the B-type sensor selected by the invention is-40 ℃ to 85 ℃. When the gas cooker is used, the continuous radiation of the gas flame and the cooker can lead the ambient temperature of the sensor to exceed the temperature range. If the infrared temperature measuring device is installed at a position with a relatively close distance, damage may be caused by the fact that the temperature around the infrared temperature measuring sensor 1 exceeds the specified use temperature, and in addition, the closer the distance is, the larger the angle of measurement inclination of the infrared temperature measuring sensor 1 is, and the more easily the sensor observation hole is polluted by liquid overflowed from the pot. The infrared temperature measuring device is integrally arranged at the rear of the center line of the left burner and the right burner and is 250-300 mm away from the left burner or the right burner, the transmission hole 21 is aligned to the left burner direction or the right burner direction, thus the measuring point of the infrared temperature measuring sensor 1 can fall on the pan wall above the bottom of the pan above the burner, and the reflectivity of the pan can be measured by the pan emissivity measuring module.
Claims (8)
1. The infrared temperature measuring device comprises an infrared temperature measuring sensor (1) for measuring temperature and is characterized by further comprising a shell (2), wherein the infrared temperature measuring sensor (1) is installed in the shell (2), a transmission hole (21) is formed in the surface of the shell (2), an anti-fouling sheet (3) capable of transmitting infrared light is arranged in the transmission hole (21), a detection channel (22) communicated with the transmission hole (21) is arranged in the shell (2), the infrared temperature measuring sensor (1) is arranged in the detection channel (22), an included angle alpha is formed between the detection channel (22) and a horizontal plane, 18 degrees < alpha <23 degrees is formed between the detection channel (22) and straight, a collimating mirror (4) which is positioned in front of the infrared temperature measuring sensor (1) and used for improving the measuring distance of the infrared temperature measuring sensor (1) is further arranged in the detection channel (22), a black coating (221) is arranged on the inner wall of the detection channel (22), and a gap of 10 m-15 mm is formed between the infrared temperature measuring sensor (1) and the collimating mirror (4).
2. The infrared temperature measurement device as set forth in claim 1, wherein a pot emissivity measurement module is further disposed in the housing, the pot emissivity measurement module comprises an infrared LED emitting tube (5) and an infrared LED receiving tube (6) which are arranged in a matched manner, and a reflectivity calculation module (7) electrically connected with the infrared LED emitting tube (5) and the infrared LED receiving tube (6).
3. The infrared temperature measuring device according to claim 2, wherein the shell (2) is provided with a first mounting hole (23) for mounting the infrared LED emitting tube (5) and a second mounting hole (24) for mounting the infrared LED receiving tube (6), the first mounting hole (34) and the second mounting hole (24) are arranged on the same side of the transmission hole (21), the outer surfaces of the first mounting hole (34) and the second mounting hole (24) are provided with anti-fouling glass (25), the arrangement direction of the first mounting hole meets the condition that a measuring point of the infrared LED emitting tube (5) falls on the outer wall of a measured object, and the arrangement direction of the second mounting hole meets the condition that the infrared LED receiving tube (6) can receive infrared light emitted by the infrared LED emitting tube (5) and reflected by the outer wall of the measured object.
4. The infrared temperature measurement device according to claim 3, wherein the first mounting hole is internally provided with a first reflecting cup (9) with a parabolic inner wall, the infrared LED emitting tube (5) is positioned at the focus of the parabolic inner wall of the first reflecting cup (9), the second mounting hole is internally provided with a second reflecting cup (8) with a parabolic inner wall, and the infrared LED receiving tube (6) is positioned at the focus of the parabolic inner wall of the second reflecting cup (8).
5. The infrared temperature measuring device as set forth in claim 4, wherein an included angle alpha, 18 degrees < alpha <23 degrees is formed between the lens of the infrared LED emitting tube (5) and the lens mounting direction of the infrared LED receiving tube (6) and the horizontal plane.
6. The infrared temperature measurement device as set forth in claim 5, wherein the housing further comprises a temperature calculation module connected with the infrared temperature measurement sensor and the reflectivity calculation module (7), wherein the temperature calculation module calculates the emissivity epsilon=1-beta of the pot body according to the radiant energy P (T) received by the infrared temperature measurement sensor and the reaction rate beta of the pot body calculated by the reflectivity calculation module (7), and then calculates the real-time absolute temperature of the bottom of the pot body to be measured according to P (T) =epsilon sigma T 4, wherein T is the absolute temperature of the outer wall of the pot body to be measured, and sigma is the Stefan-Boltzmann constant.
7. The infrared temperature measurement device as set forth in any one of claims 1 to 6, wherein the housing (2) is rectangular or square, and an anti-fouling eave (26) is provided around the top of the housing.
8. A gas stove using the infrared temperature measuring device according to any one of claims 1-6, comprising a left burner and a right burner, characterized in that the infrared temperature measuring device is integrally arranged at the rear of the center line of the left burner and the right burner and at 250-300 mm away from the left burner or the right burner, and the transmission hole (21) is aligned to the left burner direction or the right burner direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709856.9A CN112303678B (en) | 2019-08-02 | 2019-08-02 | Infrared temperature measuring device and gas stove using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709856.9A CN112303678B (en) | 2019-08-02 | 2019-08-02 | Infrared temperature measuring device and gas stove using the same |
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| Publication Number | Publication Date |
|---|---|
| CN112303678A CN112303678A (en) | 2021-02-02 |
| CN112303678B true CN112303678B (en) | 2025-02-07 |
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| CN201910709856.9A Active CN112303678B (en) | 2019-08-02 | 2019-08-02 | Infrared temperature measuring device and gas stove using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211119519U (en) * | 2019-08-02 | 2020-07-28 | 宁波方太厨具有限公司 | Infrared temperature measuring device and gas stove using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2773879B1 (en) * | 1998-01-20 | 2001-01-26 | Auxitrol Sa | TEMPERATURE MEASUREMENT SENSOR |
| CN107560753B (en) * | 2017-09-28 | 2024-01-09 | 清华大学 | Vehicle wheel axle single-point temperature measuring device and method based on visible light and infrared multispectral |
| CN107911592A (en) * | 2017-12-14 | 2018-04-13 | 合肥金星机电科技发展有限公司 | Kiln flame temperature monitoring camera |
| CN208186430U (en) * | 2018-04-03 | 2018-12-04 | 青岛海尔智能技术研发有限公司 | A kind of gas-cooker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211119519U (en) * | 2019-08-02 | 2020-07-28 | 宁波方太厨具有限公司 | Infrared temperature measuring device and gas stove using same |
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