Lampblack purification equipment with infrared temperature measurement function

Abstract

The embodiment of the invention discloses oil fume purification equipment with an infrared temperature measurement function. The oil fume purification equipment comprises an exhaust fume collecting hood and an infrared temperature sensor, the exhaust fume collecting hood is positioned above the stove; the infrared temperature sensor is located on the side face, facing the stove, of the exhaust fume collecting hood, is arranged close to the corresponding installation wall face and is used for detecting the temperature near the corresponding furnace end area. The infrared temperature sensor is arranged towards the furnace end, and a view field detection area of the infrared temperature sensor is aligned with a furnace end area; wherein the view field detection area is located within the range of the furnace end area. According to the oil smoke purification equipment, a reasonable view field detection area of the infrared temperature sensor can be designed according to an actual application scene and an installation scene of a user, so that the whole view field detection area is located in a corresponding detected cookware or furnace end area, radiation energy of irrelevant backgrounds is excluded, and the detection accuracy is improved. The temperature measurement reading of the infrared temperature sensor is ensured not to be interfered, the temperature measurement accuracy of the infrared temperature sensor is improved, and finally the automatic control effect of the oil smoke purification equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of smart home technology, and in particular to an oil fume purification device with infrared temperature measurement function. Background Technology

[0002] With the improvement of living standards, range hoods, as a common kitchen appliance for purifying the kitchen environment, quickly extract and discharge the exhaust gas generated at the stove and the oil fumes produced during cooking, thereby reducing indoor oil fume pollution and achieving the purpose of purifying kitchen air and improving the user's cooking comfort.

[0003] Currently, range hoods equipped with infrared temperature measurement can monitor the temperature of the center of the pot on the stove burner using an infrared temperature sensor, and automatically control the range hood based on the temperature changes caused by the user's cooking. Therefore, the accuracy of temperature measurement is one of the important factors affecting the automatic control of the range hood.

[0004] However, these range hoods with infrared temperature measurement functions do not consider actual application scenarios, resulting in an excessively large field of view for the infrared temperature sensor. This causes the cookware being measured to not fill the entire field of view, allowing irrelevant background radiation energy (such as the heat radiation energy of the flame around the cookware, the radiation energy of the cooktop panel, etc.) to enter the infrared temperature sensor. In other words, the flame or cooktop surface appears in the field of view of the infrared temperature sensor, which interferes with the temperature reading of the infrared temperature sensor, causing temperature measurement errors and thus affecting the automatic control of the range hood. Summary of the Invention

[0005] This invention provides an oil fume purification device with infrared temperature measurement function. It can design a reasonable field of view detection area of ​​the infrared temperature sensor according to the user's actual application scenario and installation scenario, so that the entire field of view detection area is located within the corresponding pot or stove area being measured, excluding irrelevant background radiation energy, ensuring that the temperature reading of the infrared temperature sensor is not disturbed, improving the temperature measurement accuracy of the infrared temperature sensor, and ultimately improving the automatic control effect of the oil fume purification device.

[0006] This invention provides an oil fume purification device with infrared temperature measurement function, including a fume hood and an infrared temperature sensor; the fume hood is located above the stove; the infrared temperature sensor is located on the side of the fume hood facing the stove and is close to the corresponding mounting wall, used to detect the temperature near the corresponding burner area;

[0007] The infrared temperature sensor is positioned facing the burner head, and the field of view of the infrared temperature sensor is aligned with the burner head area; wherein, the field of view is located within the range of the burner head area;

[0008] The field of view angle corresponding to the detection area of ​​the infrared temperature sensor is determined based on the following parameters:

[0009] The distance 'a' between the center point of the burner and the wall where the fume purification equipment is installed;

[0010] The diameter f of the burner head area; and,

[0011] When the fume purification equipment is located at the corresponding reference installation position: the reference distance c between the infrared temperature sensor and the cooktop surface;

[0012] The infrared temperature sensor has a reference offset z relative to the center of the corresponding furnace head along a first direction;

[0013] The first direction is parallel to the line connecting the centers of the two burners.

[0014] This invention provides an oil fume purification device with infrared temperature measurement function. The infrared temperature sensor in this device is located on one side of the fume hood close to the corresponding installation wall. Based on the user's actual application scenario and installation environment, and considering the center point of the burner, the position of the infrared temperature sensor, and the diameter of the burner area, a reasonable field of view detection area for the infrared temperature sensor is designed. This ensures that the field of view detection area of ​​the infrared temperature sensor is aligned with the burner area and does not deviate from the burner area. In other words, the entire field of view detection area of ​​the infrared temperature sensor is located within the corresponding pot or burner area being measured. The flame or cooktop surface will not appear within the field of view detection area of ​​the infrared temperature sensor, excluding irrelevant background radiation energy (such as the thermal radiation energy of the flame around the pot, the radiation energy of the cooktop panel, etc.). This ensures that the temperature reading of the infrared temperature sensor is not interfered with, effectively improving the accuracy of the infrared temperature sensor, thereby enhancing the automatic control effect of the oil fume purification device, meeting the user's cooking needs, and ensuring a good cooking experience and user comfort.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an oil fume purification device and a stove with infrared temperature measurement function provided in an embodiment of the present invention;

[0018] Figure 2a and Figure 2b This is a simplified schematic diagram showing the positional relationship of the field of view detection areas of two oil fume purification devices with infrared temperature measurement function provided in the embodiments of the present invention;

[0019] Figure 3 This is a schematic diagram showing the position of the field of view detection area of ​​an infrared temperature sensor and the burner area of ​​a stove, according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the field of view detection area and field of view angle of an infrared temperature sensor provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of another oil fume purification device and stove with infrared temperature measurement function provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of another type of oil fume purification device and stove with infrared temperature measurement function provided in the embodiments of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Regarding the installation of the fume purification equipment in this embodiment of the invention, it should be noted that the fume purification equipment can be installed on a wall (e.g., a kitchen wall). The fume purification equipment is generally used in conjunction with a stove. The offset of the infrared temperature sensor's field of view detection area relative to the burner area on the stove—that is, the position of the burner area covered by the infrared temperature sensor's field of view detection area—has certain installation requirements. If, after installation, the infrared temperature sensor's field of view, in addition to the corresponding pot or burner area, also measures the temperature of the flame or stovetop surface, then, in simpler terms, the infrared temperature sensor's field of view detection area will at least partially detect the temperature of the external area of ​​the cooking pot (such as the flame or stovetop temperature). This results in the detected temperature not accurately reflecting the actual internal temperature of the pot, thus reducing the accuracy of the fume purification equipment's temperature detection function and impairing its automatic control effect.

[0026] Based on the above-mentioned technical problems, embodiments of the present invention provide an oil fume purification device with infrared temperature measurement function. The oil fume purification device includes a fume collection hood and an infrared temperature sensor. The fume collection hood is located above the stove. The infrared temperature sensor is located on the side of the fume collection hood facing the stove and is close to the corresponding mounting wall surface, used to detect the temperature near the corresponding burner area. The infrared temperature sensor is oriented towards the burner, and its field of view is aligned with the burner area. The field of view is located within the range of the burner area. The field of view angle corresponding to the infrared temperature sensor's field of view is determined based on the following parameters: the distance *a* between the center point of the burner and the wall surface where the oil fume purification device is installed; the diameter *f* of the burner area; and, when the oil fume purification device is located at a corresponding reference installation position: the reference distance *c* between the infrared temperature sensor and the stove surface; and the reference offset *z* of the infrared temperature sensor along a first direction relative to the center of the corresponding burner. The first direction is parallel to the line connecting the centers of the two burners. After installation, if the area of ​​the pot or burner on the stove being tested is within the detection field of the infrared temperature sensor in the fume purification equipment, then the temperature detection function of the fume purification equipment is normal and the automatic control effect of the fume purification equipment is good.

[0027] For example, Figure 1 This is a structural schematic diagram of an oil fume purification device and stove with infrared temperature measurement function provided in an embodiment of the present invention, as shown below. Figure 1As shown, the fume purification device includes a fume hood 10 and an infrared temperature sensor 20. The fume hood 10 collects oily fumes from the environment to purify it, and the infrared temperature sensor 20 detects the temperature of a corresponding area. During installation, the fume hood 10 is placed above the cooktop 30, and the infrared temperature sensor 20 is placed on the fume hood 10 at a first boundary position. This first boundary position is the junction between the side of the fume hood 10 facing the cooktop 30 and the side facing the wall where it is installed. For example, the infrared temperature sensor 20 can be understood as being close to the corresponding wall surface of the fume purification device, with the distance between the infrared temperature sensor 20 and the corresponding wall surface being zero. Furthermore, the infrared temperature sensor 20 needs to be positioned on the side of the fume hood 10 facing the burner 31 of the cooktop 30, and the infrared temperature sensor 20 should be oriented towards the burner 31 of the cooktop 30. It is essential to ensure that the field of view detection area of ​​the infrared temperature sensor 20 is aligned with the burner 31 area of ​​the cooktop 30, and that the field of view detection area of ​​the infrared temperature sensor 20 is within the range of the burner 31 area of ​​the cooktop 30. For example, the center line 21 of the field of view detection area of ​​the infrared temperature sensor 20 can pass through the center point of the burner 31 area of ​​the cooktop 30; in this case, the field of view detection area of ​​the infrared temperature sensor 20 is still within the corresponding burner 31 area of ​​the cooktop 30. Alternatively, the center line 21 of the field of view detection area of ​​the infrared temperature sensor 20 may not pass through the center point of the burner 31 area of ​​the cooktop 30; in this case, the field of view detection area of ​​the infrared temperature sensor 20 is still within the corresponding burner 31 area of ​​the cooktop 30. It should also be noted that the infrared temperature sensor 20 and the burner head 31 can have a one-to-one correspondence; that is, one infrared temperature sensor 20 can correspond to one burner head 31 below the fume purification device. In this way, the infrared temperature sensor 20 can detect the temperature near the corresponding burner head 31 area (this area typically corresponds to the area inside the cooking pot 40), and the temperature detection accuracy of the infrared temperature sensor 20 is relatively high. Therefore, it can accurately detect the temperature inside the cooking pot 40, determine the cooking stage based on the corresponding temperature, and control the fume purification device to operate at the appropriate level and mode.

[0028] Based on this, an oil fume purification device with infrared temperature measurement function can be installed on a mounting wall. For example, this mounting wall can be a kitchen wall. At the determined installation location, the oil fume purification device with infrared temperature measurement function is installed, and the orientation of the infrared temperature sensor 20's field of view detection area relative to the burner head 31 of the stove 30 is adjusted. After installation, the infrared temperature sensor 20 is positioned on the side of the fume hood 10 facing the stove 30, close to the corresponding mounting wall. The infrared temperature sensor 20 should be positioned facing the burner head 31 of the stove 30 so that the field of view detection area of ​​the infrared temperature sensor 20 is aligned with the burner head 31 area of ​​the stove 30. The field of view detection area of ​​the infrared temperature sensor 20 is within the range of the burner head 31 area of ​​the stove 30, further ensuring the accuracy of temperature detection by the infrared temperature sensor 20.

[0029] In a more easily understood way, Figure 2a and Figure 2b This is a simplified schematic diagram showing the positional relationship of the field-of-view detection areas of two types of oil fume purification devices with infrared temperature measurement functions provided in this embodiment of the invention, as shown below. Figure 2a and Figure 2b As shown, the field of view of the infrared temperature sensor 20 is aligned with the corresponding burner head 31 area, and the field of view of the infrared temperature sensor 20 is located within the range of the corresponding burner head 31 area. In one specific embodiment, while ensuring that the field of view of the infrared temperature sensor 20 is located within the corresponding burner head 31 area of ​​the stove 30, Figure 2a The field-of-view center line 21 of the infrared temperature sensor 20 shown may not pass through the center point of the burner head 31 area of ​​the stove 30. That is, the center point P of the infrared temperature sensor 20 may not be aligned with the center point O of the burner head 31, but the entire field-of-view detection area of ​​the infrared temperature sensor 20 is still within the corresponding burner head 31 area of ​​the stove 30. The infrared temperature sensor 20 can detect the temperature near the corresponding burner head 31 area, thus ensuring the accuracy of temperature measurement by the infrared temperature sensor 20. Furthermore, in another specific embodiment, Figure 2b The field-of-view center line 21 of the infrared temperature sensor 20 shown can pass through the center point of the burner head 31 area of ​​the stove 30. That is, at this time, the center point P of the infrared temperature sensor 20's field of view is aligned with the center point O of the burner head 31, and the entire field-of-view detection area of ​​the infrared temperature sensor 20 is still within the corresponding burner head 31 area of ​​the stove 30. The infrared temperature sensor 20 can detect the temperature near the corresponding burner head 31 area, thus ensuring the accuracy of the infrared temperature sensor 20's temperature measurement. It should also be noted that... Figure 2bThe infrared temperature sensor 20 shown can directly measure the temperature at the center of the burner head area 31, further improving the accuracy of the infrared temperature sensor 20 and ensuring that the temperature readings of the infrared temperature sensor are not interfered with. This, in turn, improves the automatic control effect of the fume purification equipment, facilitating subsequent control of the fume purification equipment to operate at appropriate levels and modes. Furthermore, it should be noted that... Figure 2a and Figure 2b In comparison, the only difference between the same infrared temperature sensor 20 and the stove 30 is the position of the field of view detection area; the infrared temperature sensor 20 has no positional shift in either the horizontal or vertical directions.

[0030] In one specific embodiment, the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20 is determined based on the following parameters: the distance a between the center point of the burner 31 and the wall where the fume purification device is installed; the diameter f of the burner 31 area; and, when the fume purification device is located at the corresponding reference installation position: the reference distance c between the infrared temperature sensor 20 and the countertop of the cooktop 30; and the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner 31; wherein, the first direction X is a direction parallel to the line connecting the centers of the two burners 31.

[0031] First, it needs to be clarified that the fume purification equipment has a reference installation position on the corresponding wall surface. This reference installation position includes a reference installation height and a reference horizontal position. The reference installation height is based on the height of the infrared temperature sensor 20 relative to the cooktop 30. At the reference installation height, the infrared temperature sensor 20 and the cooktop 30 have a preset distance in the height direction. At the reference horizontal position, the central axis of the fume purification equipment extending along the second direction Y is the first central axis, and the central axis of the cooktop 30 extending along the second direction Y is the second central axis. The first and second central axes are parallel and located on the same vertical plane, which is perpendicular to the plane where the cooktop 30 is located. The second direction Y is a horizontal direction perpendicular to the first direction X.

[0032] Wherein, distance 'a' can be understood as the distance between the center point of the burner head 31 and the mounting wall in the second direction Y; reference distance 'c' can be understood as the distance between the infrared temperature sensor 20 corresponding to the fume purification device when it is in the reference installation position and the countertop of the cooktop 30 in the third direction Z; and reference offset 'z' can be understood as the distance between the infrared temperature sensor 20 corresponding to the fume purification device when it is in the reference installation position and the center of the corresponding burner head 31 in the first direction X. Furthermore, exemplarily, the reference installation position of the fume purification device can be determined according to the user's actual application scenario and installation scenario. When the fume purification device is in the reference installation position, the field of view detection area of ​​the infrared temperature sensor 20 is aligned with the burner head 31 area of ​​the cooktop 30, and the field of view detection area of ​​the infrared temperature sensor 20 is within the range of the burner head 31 area of ​​the cooktop 30.

[0033] Specifically, Figure 2a and Figure 2b It can be clearly seen that the shape of the field of view detection area of ​​the infrared temperature sensor 20 is similar to that of a searchlight, which can be understood as conical. It is understandable that, in order to achieve higher temperature measurement accuracy, the infrared temperature sensor 20 can measure the temperature of the center point of the burner head 31 and the surrounding area. Therefore, the position of the center point of the burner head 31 (e.g., the distance 'a' between the center point of the burner head 31 and the wall where the fume purification equipment is installed), and the relative positional relationship between the infrared temperature sensor 20 and the center point of the burner head 31 (e.g., the reference offset 'z' of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner head 31), determine the specific value of the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20.

[0034] It should also be noted that the field of view of the infrared temperature sensor 20 does not change with the actual installation height of the fume purification equipment, but the size and position of the detection area of ​​the infrared temperature sensor 20 will change with the actual installation height of the fume purification equipment. Therefore, during the installation of the fume purification equipment, the range of the detection area of ​​the infrared temperature sensor 20 at the corresponding burner 31 is not fixed. At this time, in order to achieve higher temperature measurement accuracy of the infrared temperature sensor 20, the entire detection area of ​​the infrared temperature sensor 20 needs to be located within the area of ​​the corresponding burner 31 area. That is, the range of the detection area of ​​the infrared temperature sensor 20 needs to be less than or equal to the area of ​​the burner 31 area. Therefore, the position of the infrared temperature sensor 20 (e.g., the reference distance c between the infrared temperature sensor 20 and the countertop of the stove 30) and the position of the burner 31 area (e.g., the diameter f of the burner 31 area) also determine the specific value of the field of view of the infrared temperature sensor 20. Therefore, the specific value of the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20 can be determined based on the distance a between the center point of the burner 31 and the wall where the fume purification equipment is installed, the reference distance c between the infrared temperature sensor 20 and the countertop of the stove 30, the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner 31, and the diameter f of the area of ​​the burner 31.

[0035] In the technical solution of this invention embodiment, the infrared temperature sensor in the fume purification device is set on one side of the fume hood close to the corresponding installation wall. Based on the user's actual application scenario and installation scenario, and considering the position of the burner's center point, the position of the infrared temperature sensor, and the diameter of the burner area, a reasonable field of view detection area for the infrared temperature sensor can be designed. This ensures that the field of view detection area of ​​the infrared temperature sensor is aligned with the burner area and does not deviate from the burner area. In other words, the entire field of view detection area of ​​the infrared temperature sensor is located within the corresponding pot or burner area being measured. The flame or cooktop surface will not appear within the field of view detection area of ​​the infrared temperature sensor, excluding irrelevant background radiation energy (such as the heat radiation energy of the flame around the pot, the radiation energy of the cooktop panel, etc.). This ensures that the temperature reading of the infrared temperature sensor is not interfered with, effectively improving the temperature measurement accuracy of the infrared temperature sensor, thereby improving the automatic control effect of the fume purification device, meeting the user's cooking needs, and ensuring a good cooking experience and user comfort.

[0036] Optionally, Figure 3 This is a schematic diagram showing the position of the field of view detection area of ​​an infrared temperature sensor and the burner area of ​​a stove, as provided in an embodiment of the present invention. Figure 3As shown, the burner head 31 region is a circular region with the center point of the burner head 31 as the center, and the diameter f of the burner head 31 region satisfies: 24cm≤f≤30cm.

[0037] Specifically, Figure 3 It can also be understood as Figure 2b As shown in the top view, the center point of the field of view of the infrared temperature sensor 20 can be P, and the center point of the burner head 31 can be O. In this case, point P is aligned with point O, or it can be understood that point P coincides with point O. Commonly used cookware 40 in households includes frying pans, steamers, and skillets. These are generally circular in diameter. For example, the diameter of a frying pan is 30cm, the diameter of a steamer is 26cm, and the diameter of a skillet is 24cm; that is, the diameter of the frying pan > the diameter of the steamer > the diameter of the skillet. The cookware 40 is placed on the burner head 31. The shape of the burner head 31 area can be designed with reference to the shapes of commonly used cookware 40. For example, the burner head 31 area can be a circular area centered at the center point O of the burner head 31. Furthermore, the cookware 40 will be placed on the burner 31 accordingly, and the diameter f of the burner 31 area can also be determined according to the diameter of the cookware 40 that the user frequently uses. For example, when the position of the cookware 40 on the burner 31 meets the temperature detection requirements of the corresponding infrared temperature sensor 20, it means that the burner 31 area can also meet the temperature detection requirements of the corresponding infrared temperature sensor 20.

[0038] Optionally, continue to refer to Figure 3 The radius of the field of view detection area of ​​the infrared temperature sensor 20 is k≤f / 2.

[0039] Specifically, to achieve higher temperature measurement accuracy for the infrared temperature sensor 20, the entire field of view of the infrared temperature sensor 20 needs to be located within the area of ​​the corresponding burner head 31, which means the entire field of view of the infrared temperature sensor 20 needs to be located within the area of ​​the cookware 40 on the corresponding burner head 31. Therefore, the range of the field of view of the infrared temperature sensor 20 needs to be less than or equal to the area of ​​the cookware 40. Thus, the diameter of the field of view of the infrared temperature sensor 20 should be less than or equal to the diameter f of the burner head 31, that is, the radius of the field of view of the infrared temperature sensor 20 should be less than or equal to the radius of the burner head 31, resulting in k ≤ f / 2.

[0040] Furthermore, to ensure that the entire field of view of the infrared temperature sensor 20 is within the area of ​​the cookware 40 on the corresponding burner 31, a frying pan with the smallest diameter can be prioritized. If the designed field of view of the infrared temperature sensor 20 is less than or equal to the area of ​​the frying pan, then the field of view of the infrared temperature sensor 20 is definitely smaller than the area of ​​a steamer or a wok. For example, a commonly used frying pan has a diameter of 24cm (i.e., a radius of 12cm), so the radius k of the field of view of the infrared temperature sensor 20 can be designed to be ≤12cm.

[0041] The above description of this embodiment only discusses the correspondence between the infrared temperature sensor 20 and the corresponding burner head 31, but does not specify the number of infrared temperature sensors 20. Optionally, please refer to... Figure 1 The stove 30 is equipped with two burners 31, and the smoke hood 10 is equipped with two infrared temperature sensors 20. The two infrared temperature sensors 20 are respectively facing the two burners 31. The two infrared temperature sensors 20 are far apart from each other and are located on both sides of the two burners 31 in a first direction X. The first direction X is parallel to the line connecting the centers of the two burners 31.

[0042] Specifically, Figure 1 The fume purification device shown is a top-mounted range hood. The two infrared temperature sensors 20 in this fume purification device can be understood as a separate topology. The two infrared temperature sensors 20 are spaced apart in the first direction X, and are located on opposite sides of the two burners 31. That is, the left infrared temperature sensor 20 is located directly above the corresponding burner 31 on the left and near the left inner side, with its field of view aligned with the area of ​​the burner 31 on the left. The left infrared temperature sensor 20 can measure the temperature of the area of ​​the burner 31 on the left. The right infrared temperature sensor 20 is located directly above the corresponding burner 31 on the right and near the right inner side, with its field of view aligned with the area of ​​the burner 31 on the right. The right infrared temperature sensor 20 can measure the temperature of the area of ​​the burner 31 on the right.

[0043] Optionally, Figure 4 This is a schematic diagram of the field of view detection area and field of view angle of an infrared temperature sensor provided in an embodiment of the present invention, as shown below. Figure 1 and Figure 4 As shown, the field of view is 2α, the distance between the infrared temperature sensor 20 and the center point of the furnace head 31 is d, and the radius of the field of view detection area is k, where 2α=2×arctan(k / d).

[0044] Specifically, the radius of the field of view detection area of ​​the infrared temperature sensor 20 is k. Taking line segment MN as one of the diameters of the field of view detection area of ​​the infrared temperature sensor 20 as an example, the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20 is 2α, and half of the field of view angle is α. The distance between the infrared temperature sensor 20 and the center point of the corresponding burner head 31 is d, which can also be understood as the length of the line connecting the center of the infrared temperature sensor 20 and the center of the corresponding burner head 31. When the fume purification equipment is located in the reference installation position, tanα = k / d can be obtained, that is, α = arctan(k / d), 2α = 2 × arctan(k / d).

[0045] Continue to refer Figure 1 The center point of the burner head 31 can be point O. The distance 'a' between the center point of the burner head 31 and the wall where the fume purification equipment is installed can be the length of line segment OD. That is, draw a perpendicular line from point O to the wall where the fume purification equipment is installed. The intersection of this perpendicular line and the wall where the fume purification equipment is installed is point D. In other words, line segment OD is perpendicular to the wall where the fume purification equipment is installed.

[0046] The infrared temperature sensor 20 can be point A, and its vertical projection point on the cooktop 30 can be point B. The reference distance c between the infrared temperature sensor 20 and the cooktop 30 can be a line segment, specifically line segment AB. Furthermore, the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of its corresponding burner head 31 can be line segment BD; that is, line segment BD is parallel to the first direction X and parallel to the direction of the line connecting the centers of the two burners 31 on the cooktop 30.

[0047] Infrared temperature sensor 20 can be represented as point A, and the center point of burner head 31 can be represented as point O. The distance d between infrared temperature sensor 20 and the corresponding center point of burner head 31 can be represented as line segment AO. This allows us to obtain... Furthermore, based on the distance d between the infrared temperature sensor 20 and the center point of the corresponding burner head 31, and the radius k of the field of view detection area of ​​the infrared temperature sensor 20, the field of view angle 2α corresponding to the field of view detection area of ​​the infrared temperature sensor 20 can be determined, that is,

[0048] Based on this, considering that the radius k≤f / 2 of the field of view detection area of ​​the infrared temperature sensor 20, the field of view angle 2α corresponding to the field of view detection area of ​​the infrared temperature sensor 20 can be determined according to the distance a between the center point of the burner 31 and the wall where the fume purification equipment is installed, the reference distance c between the infrared temperature sensor 20 and the countertop of the stove 30, the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner 31, and the diameter f of the burner 31 area.

[0049] Based on this, continue to refer to Figure 1 This fume purification device is a top-mounted range hood. If a user frequently uses woks, steamers, and frying pans, the radius k of the infrared temperature sensor 20's field of view can be calculated based on the frying pan's diameter of 24cm. In this case, both the wok and steamer can ensure that the infrared temperature sensor 20's field of view is within their respective areas during use. For example, a = 275mm = 27.5cm, c = 760mm = 76cm, z = 210mm = 21cm, and k = 12cm. Therefore, when k ≤ 12cm, 2α ≤ 16.4°. Optionally, to ensure that the field of view of the infrared temperature sensor 20 is within its own area during use, the field of view angle 2α can be selected to satisfy: 2α < 16.4°. This reduces the impact of the presence of edge critical regions on the temperature measurement accuracy of the infrared temperature sensor 20.

[0050] Furthermore, if a user uses a frying pan less frequently and a wok and steamer more often, the frying pan can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the steamer (26cm). In this scenario, the wok ensures that the field of view detection area of ​​the infrared temperature sensor 20 remains within its own area during use. Similarly, if a user uses a frying pan and steamer less frequently and a wok more often, the frying pan and steamer can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the wok (30cm). Examples of these scenarios will not be provided in detail here.

[0051] Optionally, Figure 5 This is a schematic diagram of another oil fume purification device and stove with infrared temperature measurement function provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the stove 30 is equipped with two burners 31, and the smoke hood 10 is equipped with two infrared temperature sensors 20. The two infrared temperature sensors 20 are respectively facing the two burners 31. The two infrared temperature sensors 20 are arranged adjacent to each other and are located in the middle of the two burners 31 in the first direction X. The first direction X is parallel to the line connecting the centers of the two burners 31.

[0052] Specifically, Figure 5 The fume purification device shown is a top-mounted range hood. The distribution of the two infrared temperature sensors 20 in this fume purification device can be understood as a centralized topology structure. That is, the infrared temperature sensor 20 on the left and the infrared temperature sensor 20 on the right are placed together, both located directly above and slightly inside the center of the cooktop 30. The field of view of the infrared temperature sensor 20 on the left is aligned with the burner 31 area on the left, and the infrared temperature sensor 20 on the right is aligned with the burner 31 area on the right, and the infrared temperature sensor 20 on the right is aligned with the burner 31 area on the right, and the infrared temperature sensor 20 on the right is aligned with the burner 31 area on the right.

[0053] Optionally, continue to refer to Figure 5 The reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner head 31 is determined by the center distance e of the two burner heads 31.

[0054] Specifically, the two infrared temperature sensors 20 are arranged close to each other and are located in the middle of the two burners 31 in the first direction X. That is, the reference offset z of each infrared temperature sensor 20 relative to the center of the corresponding burner 31 along the first direction X can be approximately considered to be equal to half of the center distance e of the two burners 31, that is, z = e / 2.

[0055] Optionally, continue to refer to Figure 4 and Figure 5 The field of view is 2α, the distance between the infrared temperature sensor 20 and the center point of the furnace head 31 is d, the radius of the field of view detection area is k, and the distance between the centers of the two furnace heads 31 is e, where 2α=2×arctan(k / d).

[0056] Specifically, the radius of the field of view detection area of ​​the infrared temperature sensor 20 is k. Taking line segment MN as one of the diameters of the field of view detection area of ​​the infrared temperature sensor 20 as an example, the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20 is 2α, and half of the field of view angle is α. The distance between the infrared temperature sensor 20 and the center point of the corresponding burner head 31 is d, which can also be understood as the length of the line connecting the center of the infrared temperature sensor 20 and the center of the corresponding burner head 31. When the fume purification equipment is located in the reference installation position, tanα = k / d can be obtained, that is, α = arctan(k / d), 2α = 2 × arctan(k / d).

[0057] Continue to refer Figure 5The infrared temperature sensor 20 can be point A, the vertical projection point of the infrared temperature sensor 20 on the surface of the stove 30 can be point B, and the reference distance c between the infrared temperature sensor 20 and the surface of the stove 30 can be line segment AB.

[0058] Infrared temperature sensor 20 can be point A. The vertical projection point of infrared temperature sensor 20 onto the countertop of stove 30 can be point B. A perpendicular line is drawn from point B to the wall where the fume purification device is installed. The intersection of this perpendicular line and the wall where the fume purification device is installed is point D, meaning line segment BD is perpendicular to the wall where the fume purification device is installed. Since infrared temperature sensor 20 is located at the first boundary of fume hood 10, points B and D overlap. The center point of burner head 31 can be point O. A perpendicular line is drawn from point O to the extension of line segment BD, with point C being the intersection point. Line segment OC is perpendicular to line segment BD (or, line segment OC is perpendicular to line segments BC and CD). The distance 'a' between the center point of burner head 31 and the wall where the fume purification device is installed can be line segment CD (or line segment BC). The distance e between the centers of the two burners 31 can be twice the distance OC between the two burners 31. The distance OC between the two burners 31 is also the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner 31. The distance OC between the two burners 31 is equal to half the distance e between the centers of the two burners 31.

[0059] Infrared temperature sensor 20 can be represented as point A, and the center point of burner head 31 can be represented as point O. The distance d between infrared temperature sensor 20 and the corresponding center point of burner head 31 can be represented as line segment AO. This allows us to obtain... Furthermore, we can obtain

[0060] Based on this, considering that the radius k≤f / 2 of the field of view detection area of ​​the infrared temperature sensor 20, the field of view angle 2α corresponding to the field of view detection area of ​​the infrared temperature sensor 20 can be determined according to the distance a between the center point of the burner 31 and the wall where the fume purification equipment is installed, the reference distance c between the infrared temperature sensor 20 and the countertop of the stove 30, the distance e between the centers of the two burners 31, and the diameter f of the burner 31 area.

[0061] Based on this, continue to refer to Figure 5 This fume purification device is a top-mounted range hood. If a user frequently uses woks, steamers, and frying pans, the radius k of the infrared temperature sensor 20's field of view can be calculated based on the frying pan's diameter of 24cm. In this case, both the wok and steamer can ensure that the infrared temperature sensor 20's field of view is within their respective areas during use. For example, a = 275mm = 27.5cm, c = 760mm = 76cm, e = 460mm = 46cm, and k = 12cm. Therefore, when k ≤ 12cm, 2α ≤ 16.3°. Optionally, to ensure that the field of view of the infrared temperature sensor 20 is within its own area during use, the field of view angle 2α can be selected to satisfy: 2α < 16.3°. This reduces the impact of the presence of edge critical regions on the temperature measurement accuracy of the infrared temperature sensor 20.

[0062] Furthermore, if a user uses a frying pan less frequently and a wok and steamer more often, the frying pan can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the steamer (26cm). In this scenario, the wok ensures that the field of view detection area of ​​the infrared temperature sensor 20 remains within its own area during use. Similarly, if a user uses a frying pan and steamer less frequently and a wok more often, the frying pan and steamer can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the wok (30cm). Examples of these scenarios will not be provided in detail here.

[0063] Optionally, Figure 6 This is a structural schematic diagram of another oil fume purification device and stove with infrared temperature measurement function provided in the embodiments of the present invention, as shown below. Figure 6 As shown, the stove 30 is equipped with two burners 31, and the fume hood 10 is equipped with two infrared temperature sensors 20. The two infrared temperature sensors 20 are respectively facing the two burners 31. The line connecting the projection of each infrared temperature sensor 20 on the plane of the stove 30 and the center of the corresponding burner 31 is the first line, and the first line is perpendicular to the wall on which the fume purification equipment is installed.

[0064] Specifically, Figure 6 The fume purification device shown is a top-mounted range hood. The distribution of the two infrared temperature sensors 20 in this fume purification device can be understood as a separate topology. The two infrared temperature sensors 20 are spaced apart in the first direction X, and the distance between the two infrared temperature sensors 20 in the first direction X is equal to the distance between the centers of the two burners 31 in the first direction X. That is, the infrared temperature sensor 20 on the left is located directly above and near the inner side of the corresponding burner 31 on the left, and the field of view of the infrared temperature sensor 20 is aligned with the area of ​​the burner 31 on the left. The infrared temperature sensor 20 on the right is located directly above and near the inner side of the corresponding burner 31 on the right, and the field of view of the infrared temperature sensor 20 is aligned with the area of ​​the burner 31 on the right. The infrared temperature sensor 20 on the right is located directly above and near the inner side of the corresponding burner 31 on the right. The infrared temperature sensor 20 on the right is located with the field of view of the infrared temperature sensor 20 aligned with the area of ​​the burner 31 on the right. The infrared temperature sensor 20 on the right is located with the temperature of the burner 31 on the right.

[0065] Optionally, continue to refer to Figure 4 and Figure 6 The field of view is 2α, the distance between the infrared temperature sensor 20 and the center point of the furnace head 31 is d, and the radius of the field of view detection area is k, where 2α=2×arctan(k / d).

[0066] Specifically, the radius of the field of view detection area of ​​the infrared temperature sensor 20 is k. Taking line segment MN as one of the diameters of the field of view detection area of ​​the infrared temperature sensor 20 as an example, the field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor 20 is 2α, and half of the field of view angle is α. The distance between the infrared temperature sensor 20 and the center point of the corresponding burner head 31 is d, which can also be understood as the length of the line connecting the center of the infrared temperature sensor 20 and the center of the corresponding burner head 31. When the fume purification equipment is located in the reference installation position, tanα = k / d can be obtained, that is, α = arctan(k / d), 2α = 2 × arctan(k / d).

[0067] Continue to refer Figure 6 The center point of the burner head 31 can be point O. The distance 'a' between the center point of the burner head 31 and the wall where the fume purification equipment is installed can be the length of line segment OD. That is, draw a perpendicular line from point O to the wall where the fume purification equipment is installed. The intersection of this perpendicular line and the wall where the fume purification equipment is installed is point D. In other words, line segment OD is perpendicular to the wall where the fume purification equipment is installed.

[0068] The infrared temperature sensor 20 can be point A, and its vertical projection point on the cooktop 30 can be point B. The reference distance c between the infrared temperature sensor 20 and the cooktop 30 can be a line segment, specifically line segment AB. Since the vertical projection point of the infrared temperature sensor 20 on the cooktop 30 lies on the first connecting line (i.e., point O and point B are on the first connecting line), line segment OB is perpendicular to the wall where the fume purification equipment is installed. In other words, points B, O, and D are collinear, and line segment BD is also perpendicular to the wall where the fume purification equipment is installed. However, since the infrared temperature sensor 20 is positioned against the wall, and points B and D overlap, the reference offset z of the infrared temperature sensor 20 along the first direction X relative to the center of the corresponding burner head 31 is 0.

[0069] Infrared temperature sensor 20 can be represented as point A, and the center point of burner head 31 can be represented as point O. The distance d between infrared temperature sensor 20 and the corresponding center point of burner head 31 can be represented as line segment AO. This allows us to obtain... Furthermore, we can obtain

[0070] Based on this, considering that the radius k≤f / 2 of the field of view detection area of ​​the infrared temperature sensor 20, the field of view angle 2α corresponding to the field of view detection area of ​​the infrared temperature sensor 20 can be determined according to the distance a between the center point of the burner 31 and the wall where the fume purification equipment is installed, the reference distance c between the infrared temperature sensor 20 and the table surface of the stove 30, and the diameter f of the burner 31 area.

[0071] Based on this, continue to refer to Figure 6 This fume purification device is a top-mounted range hood. If a user frequently uses woks, steamers, and frying pans, the radius k of the infrared temperature sensor 20's field of view can be calculated based on the frying pan's diameter of 24cm. In this case, both the wok and steamer can ensure that the infrared temperature sensor 20's field of view is within their respective areas during use. For example, a = 275mm = 27.5cm, c = 760mm = 76cm, and k = 12cm. Therefore, when k ≤ 12cm, 2α ≤ 16.9°. Optionally, to ensure that the field of view of the infrared temperature sensor 20 is within its own area during use, the field of view angle 2α can be selected to satisfy: 2α < 16.9°. This reduces the impact of the presence of critical edge regions on the temperature measurement accuracy of the infrared temperature sensor 20.

[0072] Furthermore, if a user uses a frying pan less frequently and a wok and steamer more often, the frying pan can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the steamer (26cm). In this scenario, the wok ensures that the field of view detection area of ​​the infrared temperature sensor 20 remains within its own area during use. Similarly, if a user uses a frying pan and steamer less frequently and a wok more often, the frying pan and steamer can be discarded. In this case, the radius k of the field of view detection area of ​​the infrared temperature sensor 20 can be calculated based on the diameter of the wok (30cm). Examples of these scenarios will not be provided in detail here.

[0073] Optionally, continue to refer to Figure 1 , Figure 5 and Figure 6 The infrared temperature sensor 20 is a thermopile type infrared temperature sensor.

[0074] Specifically, a thermopile-type infrared temperature sensor can receive the infrared radiation energy emitted by an object, convert it into a voltage signal, and then the internal MCU processes and calibrates the signal through algorithms to finally convert the voltage signal into the object's temperature value. The thermopile-type infrared temperature sensor consists of a heat-absorbing region (hot end), a silicon substrate (cold end), a thin film, and an outer package. The working principle of the thermopile-type infrared temperature sensor is similar to that of a conventional thermocouple, based on the Seebeck effect (thermal potential effect). Multiple thermocouple junctions are deposited on the silicon substrate, and these junctions are connected in series to form a thermal sensing channel. A very thin film, formed by etching, provides thermal isolation between the hot and cold ends. The infrared absorption region is combined with the hot end to raise its temperature, thus creating a thermoelectric potential, which ultimately outputs a voltage signal.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An oil fume purification device with infrared temperature measurement function, characterized in that, It includes a smoke hood and an infrared temperature sensor; the smoke hood is located above the cooktop; the infrared temperature sensor is located on the side of the smoke hood facing the cooktop and is close to the corresponding mounting wall surface, used to detect the temperature near the corresponding burner area; The infrared temperature sensor is positioned facing the burner head, and the field of view of the infrared temperature sensor is aligned with the burner head area; wherein, the field of view is located within the range of the burner head area; The field of view angle corresponding to the field of view detection area of ​​the infrared temperature sensor is determined based on the following parameters: The distance 'a' between the center point of the burner head and the wall on which the fume purification equipment is installed; The diameter f of the furnace head area; and, When the fume purification equipment is located at the corresponding reference installation position: the reference distance c between the infrared temperature sensor and the countertop of the stove; The infrared temperature sensor is offset by a reference amount z relative to the center of the corresponding furnace head along a first direction; The first direction is parallel to the line connecting the centers of the two burners.

2. The oil fume purification equipment according to claim 1, characterized in that, The infrared temperature sensor is configured to align its field of view center point with the center point of the furnace head.

3. The oil fume purification equipment according to claim 1, characterized in that, The radius of the field of view detection area is k≤f / 2.

4. The oil fume purification equipment according to claim 1, characterized in that, The stove is equipped with two burners, and the smoke hood is equipped with two infrared temperature sensors, with the two infrared temperature sensors facing the two burners respectively. The two infrared temperature sensors are located far apart from each other and are positioned on opposite sides of the two furnace heads in the first direction.

5. The oil fume purification equipment according to claim 4, characterized in that, The field of view is 2α, the distance between the infrared temperature sensor and the center point of the furnace head is d, and the radius of the field of view detection area is k, where 2α = 2 × arctan(k / d).

6. The oil fume purification equipment according to claim 5, characterized in that, The range of the field of view 2α satisfies: 2α < 16.4°.

7. The oil fume purification equipment according to claim 1, characterized in that, The stove is equipped with two burners, and the smoke hood is equipped with two infrared temperature sensors, with the two infrared temperature sensors facing the two burners respectively. The two infrared temperature sensors are arranged close together and are both located in the middle of the two furnace heads in the first direction.

8. The oil fume purification equipment according to claim 7, characterized in that, The field of view is 2α, the distance between the infrared temperature sensor and the center point of the furnace head is d, the radius of the field of view detection area is k, and the distance between the centers of the two furnace heads is e, where 2α = 2 × arctan(k / d).

9. The oil fume purification equipment according to claim 8, characterized in that, The range of the field of view 2α satisfies: 2α < 16.3°.

10. The oil fume purification equipment according to claim 4, characterized in that, The first line is formed by connecting the projection of the infrared temperature sensor onto the plane of the stove and the center of the burner head. This first line is perpendicular to the wall on which the fume purification device is installed.

11. The oil fume purification equipment according to claim 10, characterized in that, The field of view is 2α, the distance between the infrared temperature sensor and the center point of the furnace head is d, and the radius of the field of view detection area is k, where 2α = 2 × arctan(k / d).

12. The oil fume purification equipment according to claim 11, characterized in that, The range of the field of view 2α satisfies: 2α < 16.9°.

13. The oil fume purification equipment according to claim 1, characterized in that, The fume purification equipment is a top-mounted range hood.

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