Oil smoke particle measurement standard system

Abstract

The utility model relates to the technical field of smoke measurement, and particularly discloses an oil smoke particle measurement standard system which comprises a measurement container, an oil smoke generator, a laser, a photoelectric detector and an aerodynamic particle size spectrometer. Wherein at least part of the measuring container is made of a transparent material, and a particle mixing cavity is formed in the measuring container; the oil fume generator is used for generating oil fume and can convey the oil fume into the particle uniform mixing cavity; the laser is used for emitting laser, the laser is arranged on one side of the particle mixing cavity, and the laser emitted by the laser can penetrate through the particle mixing cavity from the transparent material of the measuring container; the photoelectric detector is arranged on the other side of the particle mixing cavity, is opposite to the laser and is used for detecting the laser penetrating through the particle mixing cavity; the aerodynamic particle size spectrometer is used for measuring particle information in the particle mixing cavity. According to the utility model, the particle removal efficiency of the range hood can be effectively judged through the calibrated laser and the photoelectric detector.

Description

Technical Field

[0001] This utility model relates to the field of smoke measurement technology, and in particular to a standard system for measuring oil fume particles. Background Technology

[0002] In recent years, more and more people have paid attention to indoor air pollution. Harmful physical and chemical substances in the air can endanger human health when they enter the body. Studies have shown that sulfur dioxide, carbon monoxide, and suspended particulate matter produced by the combustion of various fuels and the heating of cooking oil are significant sources of indoor air pollution. Range hoods are commonly used devices to address indoor cooking fume particulate pollution, and with the improvement of living standards, the efficiency required for range hoods to remove particles is increasing.

[0003] Currently, the main methods for evaluating the efficiency of range hoods in removing oil fume particles include sampling, light scattering, and light transmission. However, due to the different testing instruments, the results vary, making it impossible to obtain a quantitative standard and thus impossible to effectively determine the efficiency of range hoods in removing oil fume particles.

[0004] Therefore, it is urgent to study a standard system for measuring oil fume particles in order to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a standard system for measuring oil fume particles, so as to solve the problem that the oil fume particle removal efficiency of existing range hoods cannot be effectively determined.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The standard system for measuring oil fume particles includes:

[0008] A measuring container, at least partially made of transparent material, and having a particle mixing chamber inside;

[0009] A fume generator is used to produce oil fumes and can deliver the oil fumes to a particle mixing chamber.

[0010] A laser is used to emit laser light. The laser is located on one side of the particle mixing cavity and can emit laser light through the transparent material of the measuring container into the particle mixing cavity.

[0011] A photodetector is located on the other side of the particle mixing cavity and is positioned opposite the laser. The photodetector is used to detect the laser light passing through the particle mixing cavity.

[0012] Aerodynamic particle size analyzer is used to measure particle information within a particle mixing chamber.

[0013] As an optional technical solution for a standard system for measuring oil fume particles, the standard system for measuring oil fume particles also includes an adjustment component. The adjustment component has two mounting parts, and the distance between the two mounting parts and the measuring container is adjustable. A laser and a photodetector are correspondingly mounted on the two mounting parts.

[0014] As an optional technical solution for a standard system for measuring oil fume particles, the adjustment component includes an adjustment seat and a first mounting member forming one of the mounting portions. The first mounting member is slidably fitted onto the adjustment seat along the horizontal direction of the particle mixing chamber, and a laser is mounted on the first mounting member.

[0015] As an optional technical solution for a standard system for measuring oil fume particles, the adjusting seat is provided with a sliding channel that runs through both ends of its horizontal direction. The first mounting component is rod-shaped and located within the sliding channel, and can slide relative to the adjusting seat in the horizontal direction.

[0016] As an optional technical solution for a standard system for measuring oil fume particles, the adjustment component also includes a locking element. The locking element is located on the adjustment seat and can be connected to the first mounting element to lock the first mounting element relative to the adjustment seat. It can also be separated from the first mounting element to unlock the first mounting element and the adjustment seat.

[0017] As an optional technical solution for a standard system for measuring oil fume particles, the adjusting seat is provided with a locking screw hole, which is connected to the sliding channel and the two extend perpendicularly. The locking element is a locking screw, which is threaded into the locking screw hole and located at the end of the sliding channel, and can abut against the first mounting part to lock the first mounting part relative to the adjusting seat.

[0018] As an optional technical solution for a standard system for measuring oil fume particles, the adjustment assembly further includes a second mounting component forming another mounting section. The second mounting component is slidably fitted onto the adjustment seat along the horizontal direction of the particle mixing chamber, and a photodetector is mounted on the second mounting component; and / or,

[0019] The two mounting parts remain in a straight line during the distance adjustment process.

[0020] As an optional technical solution for a standard system for measuring oil fume particles, the standard system for measuring oil fume particles also includes a blower, which is located in the measuring container and is used to blow air into the particle mixing chamber.

[0021] As an optional technical solution for a standard system for measuring oil fume particles, the blowing component is a silent fan.

[0022] As an optional technical solution for a standard system for measuring oil fume particles, the measuring container includes a front sidewall, a rear sidewall, a left sidewall, a right sidewall, an upper sidewall, and a lower sidewall forming a hexahedral structure. The front and rear sidewalls are opposite each other, the left and right sidewalls are opposite each other, and the upper and lower sidewalls are opposite each other; wherein,

[0023] At least the front sidewall, rear sidewall, upper sidewall, and lower sidewall are provided with air blowing components; and / or,

[0024] At least the front sidewall, rear sidewall, upper sidewall, and lower sidewall are provided with smoke inlet channels, and each smoke inlet channel is connected to the smoke outlet of the fume generator.

[0025] The beneficial effects of this utility model are as follows:

[0026] This invention provides a standard system for measuring oil fume particles. The system includes an oil fume generator, a laser, and an aerodynamic particle size analyzer. Oil fume is introduced into a particle mixing chamber via the oil fume generator. A photodetector measures the laser emitted by the laser and passing through the mixing chamber to obtain a set of parameters. The aerodynamic particle size analyzer then directly measures the particle information within the mixing chamber. Based on this particle information, the parameters obtained by the photodetector are calibrated. Therefore, in subsequent measurements, particle information in the oil fume can be obtained solely from the data measured by the laser and photodetector. Because of the calibration by the aerodynamic particle size analyzer, subsequent measurements using the laser and photodetector provide a quantitative and reliable result for measuring oil fume particles. This allows for effective determination of the oil fume particle removal efficiency of a range hood using the laser and photodetector. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the oil fume particle measurement standard system in this embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the measuring container and adjusting assembly in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the adjustment component in an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the blower component in an embodiment of this utility model.

[0031] In the picture:

[0032] 100. Measuring container; 110. Support frame; 120. Smoke inlet channel; 130. Mounting hole; 101. Front side wall; 102. Left side wall; 103. Right side wall; 104. Top side wall; 105. Bottom side wall;

[0033] 200. Fume generator;

[0034] 300. Laser;

[0035] 400. Photodetector;

[0036] 500. Aerodynamic particle size analyzer;

[0037] 600. Adjustment component; 610. Adjustment seat; 611. Sliding channel; 620. First mounting component; 630. Second mounting component;

[0038] 700. Air blower; 710. Connecting rod. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] like Figures 1 to 4 As shown, this embodiment provides a standard system for measuring oil fume particles. The system includes a measuring container 100, an oil fume generator 200, a laser 300, a photodetector 400, and an aerodynamic particle size analyzer 500. The measuring container 100 is at least partially made of transparent material and has an internal particle mixing chamber. The oil fume generator 200 generates oil fumes and delivers them to the particle mixing chamber. The laser 300 is located on one side of the particle mixing chamber and emits laser light, which passes through the transparent material of the measuring container 100 into the particle mixing chamber. The photodetector 400 is located on the other side of the particle mixing chamber, opposite to the laser 300, and detects the laser light passing through the particle mixing chamber. The aerodynamic particle size analyzer 500 measures particle information within the particle mixing chamber.

[0044] It should be noted that the sample acquisition head of the aerodynamic particle size spectrometer 500 is located inside the particle mixing chamber and is used to collect oil fume samples. The measurement principle is well known to those skilled in the art, so it will not be described again here.

[0045] In use, the fume generator 200 first supplies fumes into the particle mixing chamber. The photodetector 400 measures the laser emitted by the laser 300 that passes through the particle mixing chamber, thus obtaining a set of parameters. Then, the aerodynamic particle size analyzer 500 directly measures the particle information in the particle mixing chamber. Based on the particle information, the parameters obtained by the photodetector 400 are calibrated. Thus, in subsequent measurements, the particle information in the fumes can be obtained solely from the data measured by the laser 300 and the photodetector 400. This allows for an effective determination of the particle removal efficiency of the range hood using the laser 300 and the photodetector 400.

[0046] When determining the particle removal efficiency of a range hood, a calibrated laser 300 and photodetector 400 are directly installed at the air inlet and exhaust outlet of the range hood to measure two sets of data, thereby calculating the particle removal efficiency of the range hood, that is, the effect of the range hood on removing particulate matter from cooking fumes. Alternatively, based on the cooking fume particle measurement standard system in this embodiment, the fume generator 200 and aerodynamic particle size analyzer 500 can be removed, and cooking fumes before filtration and after filtration by the range hood can be sequentially introduced into the particle mixing chamber. This allows the laser 300 and photodetector 400 to measure two sets of data, and the particle removal efficiency of the range hood for cooking fumes can then be calculated.

[0047] Considering that different models of lasers 300 have different emission angles, in order to adapt to different models of lasers 300, in this embodiment, the oil fume particle measurement standard system also includes an adjustment component 600. The adjustment component 600 has two mounting parts, and the distance between the two mounting parts and the measuring container 100 is adjustable. The laser 300 and the photodetector 400 are correspondingly mounted on the two mounting parts.

[0048] For example, the adjustment assembly 600 includes an adjustment seat 610 and a first mounting member 620 forming one of the mounting portions. The first mounting member 620 is slidably fitted to the adjustment seat 610 along the horizontal direction of the particle mixing cavity, and the laser 300 is mounted on the first mounting member 620. The sliding fit installation method ensures that when the position of the first mounting member 620 relative to the adjustment seat 610 changes, its relative angle does not change. This adjusts the position of the laser 300 relative to the particle mixing cavity, allowing lasers with different divergence angles emitted by different types of lasers 300 to pass smoothly through the particle mixing cavity.

[0049] Combination Figure 2 and Figure 3 As shown, in some embodiments, the adjusting base 610 is provided with a sliding channel 611 extending horizontally through both ends of its face. The first mounting member 620 is rod-shaped and located within the sliding channel 611, and can slide relative to the adjusting base 610 in the horizontal direction. Specifically, the extending direction of the sliding channel 611 is the length direction of the particle mixing cavity. The setting of the sliding channel 611 restricts the movement of the first mounting member 620 relative to the adjusting base 610, ensuring the reliability of the adjustment process. Furthermore, the way the first mounting member 620 is slidably disposed within the sliding channel 611 allows for numerous relative positional relationships between the first mounting member 620 and the adjusting base 610, to accommodate various types of lasers 300.

[0050] To ensure the reliability of test results during the testing process, in some embodiments, the adjustment component 600 further includes a locking element. The locking element is located on the adjustment seat 610 and can connect to the first mounting member 620 to lock the first mounting member 620 relative to the adjustment seat 610. It can also be separated from the first mounting member 620 to unlock the first mounting member 620 from the adjustment seat 610. Locking the first mounting member 620 and the adjustment seat 610 stabilizes the position of the laser 300, thereby ensuring the stability of the light source during the testing process and ensuring the reliability and accuracy of the test results.

[0051] For example, the adjusting seat 610 is provided with a locking screw hole, which communicates with the sliding channel 611, and the two extend perpendicularly. The locking element is a locking screw, which is threaded into the locking screw hole and located at the end of the sliding channel 611, abutting against the first mounting member 620 to lock the first mounting member 620 relative to the adjusting seat 610. The locking screw allows for convenient and quick locking and unlocking of the first mounting member 620 relative to the adjusting seat 610 by screwing, improving operational efficiency. In other embodiments, the adjusting seat 610 is threaded on its outer periphery, and a threaded locking nut is fitted onto the adjusting seat 610. The adjusting seat 610 has a gap penetrating the sliding channel 611 at the opening of the sliding channel 611, and the outer diameter of the adjusting seat 610 gradually increases in the direction toward the opening of the sliding channel 611. During the process of screwing the locking nut, the inner diameter of the sliding channel 611 can be adjusted, thereby allowing the adjusting seat 610 to tighten or release the first mounting member 620.

[0052] To accommodate different types of lasers 300, the position of the photodetector 400 relative to the particle mixing cavity also needs to be adjusted accordingly. Therefore, the adjustment assembly 600 also includes a second mounting member 630 forming another mounting portion. The second mounting member 630 is slidably fitted onto the adjustment seat 610 along the horizontal direction of the particle mixing cavity, and the photodetector 400 is mounted on the second mounting member 630. The fitting method between the second mounting member 630 and the adjustment seat 610 can be set with reference to the fitting method between the first mounting member 620 and the adjustment seat 610, and will not be described again here.

[0053] Considering that the position of the light-emitting part of the laser 300 with different signals remains unchanged, in order to reduce the difficulty of adjustment, in some embodiments, the two mounting parts are kept on the same straight line during the distance adjustment process.

[0054] In this embodiment, the adjusting seat 610 is fixed to the measuring container 100. This can be achieved through welding, screwing, or snap-fitting. The dimensions of the particle mixing chamber are 70cm × 70cm × 130cm. That is, the length of the particle mixing chamber is 70cm, the width is 70cm, and the height is 130cm. The measuring container 100 is made of transparent acrylic material to make the entire measuring container 100 transparent. The length and width directions are perpendicular to each other and are both horizontal, while the height direction is vertical.

[0055] Combination Figure 2 As shown, the oil fume particle measurement standard system also includes a support frame 110 located at the bottom of the measuring container 100. The support frame 110 is used to support the measuring container 100, preventing the measuring container 100 from contacting the ground, thereby reducing the influence of the ground temperature on the temperature inside the particle mixing chamber and helping to ensure the reliability of the test results.

[0056] To ensure that the oil fumes are evenly dispersed after entering the particle mixing chamber, in some embodiments, the oil fume particle measurement standard system further includes a blower 700. The blower 700 is disposed in the measuring container 100 and is used to blow air into the particle mixing chamber. The air blown out by the blower 700 mixes the oil fume particles in the particle mixing chamber, thereby helping to improve the accuracy of the measurement.

[0057] To reduce the impact of vibration on the laser 300, the blower 700 is a silent fan to reduce the vibration generated during the blowing process, thereby ensuring the stability of the working environment of the laser 300, ensuring the stability of laser emission, and improving the accuracy of testing.

[0058] To improve the installation efficiency of the silent fan and the connection effect between it and the measuring container 100, a mounting hole 130 is provided in the measuring container 100 for installing the silent fan. Combined with... Figure 4 As shown, a silent fan is connected to a connecting rod 710, which passes through the mounting hole 130 and is fixed to the measuring container 100. The silent fan is located inside the particle mixing chamber, and the connecting rod 710 is a screw, with a portion of the screw extending out of the measuring container 100 and screwed into a nut.

[0059] The measuring container 100 includes a front sidewall 101, a rear sidewall, a left sidewall 102, a right sidewall 103, an upper sidewall 104, and a lower sidewall 105 forming a hexahedral structure. The front sidewall 101 and the rear sidewall are opposite each other, the left sidewall 102 and the right sidewall 103 are opposite each other, and the upper sidewall 104 and the lower sidewall 105 are opposite each other. At least the front sidewall 101, the rear sidewall, the upper sidewall 104, and the lower sidewall 105 are provided with air blowing elements 700. Each of the front sidewall 101, the rear sidewall, the upper sidewall 104, and the lower sidewall 105 is provided with a plurality of air blowing elements 700. For example, a total of 24 air blowing elements 700 are provided, with 8 on each of the front sidewall 101 and the rear sidewall, and 4 on each of the upper sidewall 104 and the lower sidewall 105.

[0060] The measuring container 100 is provided with a smoke inlet channel 120 communicating with the particle mixing chamber, and the smoke outlet of the fume generator 200 is connected to the smoke inlet channel 120. The fume generator 200 and the measuring container 100 can be connected by a pipe, with one end of the pipe connected to the smoke outlet and the other end connected to the smoke inlet channel 120. Regarding the arrangement of the smoke inlet channel 120, at least the front sidewall 101, rear sidewall, upper sidewall 104, and lower sidewall 105 are provided with smoke inlet channels 120. For example, a total of 10 smoke inlet channels 120 are provided, with 4 each on the front sidewall 101 and rear sidewall, and 1 each on the upper sidewall 104 and lower sidewall 105. In other embodiments, the fume generator 200 may also be disposed inside the particle mixing chamber.

[0061] In this embodiment, the first mounting component 620 slides with the left side wall 102 as the reference surface, and its adjustment range is 0-35cm. The second mounting component 630 slides with the right side wall 103 as the reference surface, and its adjustment range is 0-35cm.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A standard system for measuring oil fume particles, characterized in that, include: A measuring container (100), at least a portion of which is made of transparent material and has a particle mixing chamber inside; Oil fume generator (200), the oil fume generator (200) is used to generate oil fumes and can transport the oil fumes to the particle mixing chamber; A laser (300) is used to emit laser light. The laser (300) is located on one side of the particle mixing cavity and can emit laser light through the transparent material of the measuring container (100) into the particle mixing cavity. A photodetector (400) is disposed on the other side of the particle mixing cavity and is disposed opposite to the laser (300). The photodetector (400) is used to detect the laser passing through the particle mixing cavity. Aerodynamic particle size analyzer (500) is used to measure particle information in a particle mixing chamber.

2. The oil fume particle measurement standard system according to claim 1, characterized in that, The oil fume particle measurement standard system also includes an adjustment component (600), which has two mounting parts. The distance between the two mounting parts and the measuring container (100) is adjustable. The laser (300) and the photodetector (400) are correspondingly mounted on the two mounting parts.

3. The oil fume particle measurement standard system according to claim 2, characterized in that, The adjustment assembly (600) includes an adjustment seat (610) and a first mounting member (620) forming one of the mounting portions. The first mounting member (620) is slidably fitted to the adjustment seat (610) along the horizontal direction of the particle mixing chamber. The laser (300) is mounted on the first mounting member (620).

4. The oil fume particle measurement standard system according to claim 3, characterized in that, The adjusting seat (610) is provided with a sliding channel (611) extending through both ends of its horizontal direction. The first mounting member (620) is rod-shaped and located in the sliding channel (611), and can slide relative to the adjusting seat (610) in the horizontal direction.

5. The oil fume particle measurement standard system according to claim 4, characterized in that, The adjustment assembly (600) further includes a locking member disposed on the adjustment seat (610) and capable of connecting to the first mounting member (620) to lock the first mounting member (620) relative to the adjustment seat (610), and capable of separating from the first mounting member (620) to unlock the first mounting member (620) from the adjustment seat (610).

6. The oil fume particle measurement standard system according to claim 5, characterized in that, The adjusting seat (610) is provided with a locking screw hole, which is connected to the sliding channel (611) and the two extend perpendicularly. The locking member is a locking screw, which is threaded into the locking screw hole and located at the end of the sliding channel (611) and can abut against the first mounting member (620) so that the first mounting member (620) is locked relative to the adjusting seat (610).

7. The oil fume particle measurement standard system according to claim 3, characterized in that, The adjustment assembly (600) further includes a second mounting member (630) forming another mounting portion, the second mounting member (630) being slidably fitted onto the adjustment seat (610) along the horizontal direction of the particle mixing chamber, and the photodetector (400) being mounted on the second mounting member (630); and / or, The two mounting parts remain in a straight line during the distance adjustment process.

8. The oil fume particle measurement standard system according to any one of claims 1-7, characterized in that, The oil fume particle measurement standard system also includes a blower (700), which is disposed in the measurement container (100) and is used to blow air into the particle mixing chamber.

9. The oil fume particle measurement standard system according to claim 8, characterized in that, The blower (700) is a silent fan.

10. The oil fume particle measurement standard system according to claim 8, characterized in that, The measuring container (100) includes a front sidewall (101), a rear sidewall, a left sidewall (102), a right sidewall (103), an upper sidewall (104), and a lower sidewall (105) forming a hexahedral structure. The front sidewall (101) and the rear sidewall are opposite each other, the left sidewall (102) and the right sidewall (103) are opposite each other, and the upper sidewall (104) and the lower sidewall (105) are opposite each other. At least the front sidewall (101), rear sidewall, upper sidewall (104), and lower sidewall (105) are provided with the blower (700); and / or, At least the front sidewall (101), rear sidewall, upper sidewall (104) and lower sidewall (105) are provided with smoke inlet channels (120), and each smoke inlet channel (120) is connected to the smoke outlet of the fume generator (200).

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