Grease detection equipment

Abstract

The invention provides grease detection equipment, and relates to the technical field of grease quality detection. Comprising a shell assembly, an environment adjusting assembly, a Raman detection assembly and an automatic sample injection assembly, a containing cavity is formed in the machine shell assembly; the environment adjusting assembly, the Raman detection assembly and the automatic sample injection assembly are all arranged in the containing cavity, the environment adjusting assembly is used for adjusting the temperature and humidity in the containing cavity, the Raman detection assembly is used for collecting spectral data of a sample, and the automatic sample injection assembly is used for moving the sample to a collecting path of the Raman detection assembly; all functional modules are integrated into small integrated equipment through reasonable layout, a stable detection environment is provided, automatic detection of batch samples is supported, and the device has the advantages of being low in cost, convenient and easy to use and capable of rapidly completing high-throughput automatic screening of grease quality.

Description

Technical Field

[0001] This application relates to the field of oil quality testing technology, and more specifically, to an oil testing device. Background Technology

[0002] As a crucial raw material in food processing, the quality and safety of oils directly impact consumer health. During the production, storage, and transportation of oils, it is essential to regularly monitor key indicators such as acid value and peroxide value. While traditional chemical detection methods, such as titration and gas chromatography, are accurate and reliable, they have significant limitations: these methods require complex sample pretreatment processes, utilize large amounts of organic solvents and chemical reagents, are not only cumbersome and time-consuming but also generate harmful waste; furthermore, traditional methods demand highly skilled operators, and the testing equipment is bulky and expensive, making rapid screening at production sites and storage facilities difficult.

[0003] Raman spectroscopy has shown promising application prospects in the field of oil and fat detection due to its advantages such as speed, non-destructive nature, and no need for sample pretreatment. However, existing Raman detection equipment still faces many challenges in practical applications: First, changes in ambient temperature and humidity significantly affect the stability and reproducibility of Raman spectral signals, and existing equipment generally lacks a precise environmental control system; second, most equipment only supports single-sample detection, requiring frequent opening and closing of the equipment to change samples during batch detection, which not only reduces detection efficiency but also disrupts the stability of the internal detection environment due to interference from external air; third, for samples such as oils and fats that are prone to solidification at low temperatures, existing equipment lacks effective temperature control measures, which may lead to changes in sample state and affect the detection results.

[0004] Furthermore, existing testing equipment often disperses its functional modules, resulting in a bulky overall size that is inconvenient for on-site use. During testing, operators need to manually adjust multiple parameters, increasing operational complexity and increasing the risk of human error. These problems severely restrict the widespread application of Raman spectroscopy in the rapid detection of oil and fat quality.

[0005] There is currently no effective technical solution to the above problems. Summary of the Invention

[0006] The purpose of this application is to provide an oil and fat testing device that has the advantages of low cost, ease of use, and high-throughput automatic screening of oil and fat quality.

[0007] In a first aspect, this application provides an oil and fat detection device, comprising: a housing assembly, an environmental conditioning assembly, a Raman detection assembly, and an automatic sample injection assembly; The housing assembly has an internal receiving cavity; The environmental conditioning component, Raman detection component, and automatic sample introduction component are all housed in the containment cavity. The environmental conditioning component is used to regulate the temperature and humidity in the containment cavity, the Raman detection component is used to acquire spectral data of the sample, and the automatic sample introduction component is used to move the sample to the acquisition path of the Raman detection component.

[0008] This invention integrates environmental conditioning components, Raman detection components, and automatic sample introduction components into a compact, all-in-one device through a rational layout. Compared to the equipment required for traditional detection methods, this invention is lower in cost, easier to use, and can quickly complete high-throughput automatic screening of oil quality.

[0009] Optionally, the containment cavity includes a first inner cavity and a second inner cavity. An environmental conditioning component is disposed in the first inner cavity, and a Raman detection component and an automatic sample introduction component are disposed in the second inner cavity. The first inner cavity and the second inner cavity are connected by a pair of circulating fans. The pair of circulating fans are used to drive the air in the containment cavity to circulate between the first inner cavity and the second inner cavity to regulate the temperature and humidity in the second inner cavity.

[0010] Optionally, the environmental control components include: a cooler, a dehumidifier, and a heater; The cooler and dehumidifier are located on the side of the first inner cavity. A drain is provided below the cooler and dehumidifier respectively. The drain is used to collect the condensate produced by the cooler and dehumidifier and discharge the condensate out of the housing assembly. The radiator of the cooler is located on the outside of the housing assembly. The heater is located on the lower side of the first inner cavity.

[0011] Through the above technical solutions, this application effectively solves the problems in the prior art where improper handling of condensate during the cooling and dehumidification process of environmental control components leads to uncontrolled humidity or damage inside the equipment, as well as the problem of difficulty in accurately maintaining the liquid state of oil samples, which affects the test results.

[0012] Optionally, the automated sample delivery assembly includes: a cuvette sample holder and a drive unit; The cuvette sample holder is positioned above the drive unit. The cuvette sample holder has multiple sample slots. The drive unit is used to rotate the cuvette sample holder so that one of them is aligned with the Raman detection component.

[0013] Optionally, the Raman detection assembly includes: a spectrometer probe, a Raman spectrometer, and a support frame; The spectrometer probe is positioned above the support frame, facing the cuvette sample holder. The Raman spectrometer is electrically connected to the spectrometer probe and is placed below the drive unit.

[0014] Optionally, a pair of circulating fans includes an inlet fan and an outlet fan arranged from top to bottom. The inlet fan is used to drive air from the first inner cavity into the second inner cavity, and the outlet fan is used to drive air from the second inner cavity into the first inner cavity.

[0015] Through the directional division of labor and synergistic effect of the inlet and outlet fans, air achieves efficient and stable circulation between the first and second inner cavities, thereby solving the problems of low airflow efficiency and uneven temperature and humidity distribution in traditional solutions, and significantly improving the stability and consistency of the detection environment in the entire containment cavity, especially in the second inner cavity.

[0016] Optionally, a U-shaped bracket is provided above the cuvette sample holder: The U-shaped frame surrounds the cuvette sample holder and the spectrometer probe. The U-shaped frame is located between the first inner cavity and the second inner cavity. The U-shaped frame is provided with a U-shaped inner cavity, an air inlet and multiple air outlets. The air inlet is used to install an air inlet fan to connect to the first inner cavity. The air inlet connects to the U-shaped inner cavity. Multiple air outlets connect to the U-shaped inner cavity, and some of the air outlets face the cuvette sample holder, while the other air outlets face downwards to connect to the second inner cavity.

[0017] Optionally, the housing assembly includes an outer shell that encloses the receiving cavity, a partition is provided on the spectrometer probe, the partition and the U-shaped frame enclose the cuvette sample holder to form a detection cavity, the outer shell is provided with a lid, the lid is located directly above the detection cavity, and the partition is used to prevent air from flowing from the detection cavity into the second inner cavity during the process of sample loading and unloading when the lid is opened.

[0018] Optionally, the housing is provided with thermal insulation material.

[0019] Optionally, a power supply assembly is also provided between the receiving cavity and the outer shell, and the power supply assembly is connected to the environmental conditioning assembly, the Raman detection assembly and the automatic sample introduction assembly.

[0020] As can be seen from the above, the oil and fat testing equipment provided in this application includes: a housing assembly, an environmental conditioning assembly, a Raman detection assembly, and an automatic sample introduction assembly; the housing assembly has an internal receiving cavity; the environmental conditioning assembly, the Raman detection assembly, and the automatic sample introduction assembly are all located in the receiving cavity. The environmental conditioning assembly is used to regulate the temperature and humidity in the receiving cavity, the Raman detection assembly is used to acquire spectral data of the sample, and the automatic sample introduction assembly is used to move the sample to the acquisition path of the Raman detection assembly. By rationally arranging the functional modules, a small integrated device is formed, providing a stable detection environment and supporting the automatic detection of batch samples. It has the advantages of low cost, ease of use, and high-throughput automatic screening of oil and fat quality.

[0021] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall oil testing equipment provided in the embodiments of this application.

[0023] Figure 2 This is a schematic diagram of the internal structure of the oil detection device provided in the embodiments of this application.

[0024] Figure 3 This is a schematic diagram showing the positions of the U-shaped frame, cuvette sample holder, and spectrometer probe provided in the embodiments of this application.

[0025] Figure 4 This is a schematic diagram of the U-shaped frame provided in an embodiment of this application.

[0026] Labeling Explanation: 100, Outer shell; 101, First inner cavity; 102, Second inner cavity; 104, Cooler; 105, Dehumidifier; 106, Heater; 107, Cuvette sample holder; 108, Radiator; 109, Sample slot; 200, Spectrometer probe; 201, Raman spectrometer; 203, Inlet fan; 204, Outlet fan; 205, U-shaped frame; 206, Air inlet; 207, Air outlet; 209, Partition; 210, Detection chamber; 211, Cover; 212, Power supply assembly; 213, Cooling fan. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Firstly, referring to Figure 1-4 This application provides an oil and fat testing device, including: a housing assembly, an environmental conditioning assembly, a Raman detection assembly, and an automatic sample injection assembly; The housing assembly has an internal receiving cavity; The environmental conditioning component, Raman detection component, and automatic sample introduction component are all housed in the containment cavity. The environmental conditioning component is used to regulate the temperature and humidity in the containment cavity, the Raman detection component is used to acquire spectral data of the sample, and the automatic sample introduction component is used to move the sample to the acquisition path of the Raman detection component.

[0030] For ease of understanding, the following explains some key terms in this embodiment: Housing assembly: This assembly provides the external structure and internal housing space for the grease testing equipment. Its internal housing cavity is used to house other functional modules and serves to protect internal components and isolate them from the external environment.

[0031] Environmental control component: This component is responsible for precisely controlling the temperature and humidity within the containment chamber to ensure a stable detection environment, thereby guaranteeing the accuracy and repeatability of spectral data acquisition and maintaining the oil sample in a suitable liquid state.

[0032] Raman detection component: This component is used to acquire Raman spectral data of samples, and to evaluate the quality of oils by analyzing the spectral characteristics of the samples, achieving rapid and non-destructive detection.

[0033] Automatic sample introduction component: This component is used to automatically move the sample to be tested onto the spectral acquisition path of the Raman detection component, reducing manual intervention and improving detection efficiency and automation.

[0034] This application proposes a fat and oil detection device aimed at solving the problems of environmental fluctuations affecting detection accuracy, low automation leading to operational interference, and difficulty in maintaining the liquid state of samples in existing fat and oil detection devices, thereby achieving rapid, high-throughput automatic detection. The device includes a housing assembly, an environmental conditioning assembly, a Raman detection assembly, and an automatic sample introduction assembly.

[0035] The housing assembly has an internal cavity. This cavity provides a relatively enclosed space for housing and protecting other functional components. For example, the cavity can be constructed from sheet metal or high-strength plastic through welding, bolting, or integral molding. Its structural design ensures the airtightness of the internal space to reduce the influence of the external environment on the internal temperature and humidity.

[0036] The environmental control assembly, Raman detection assembly, and automatic sample introduction assembly are all housed within the aforementioned containment chamber. This integrated layout makes the entire device compact, easy to carry, and deploy. The environmental control assembly regulates the temperature and humidity within the containment chamber. For example, the environmental control assembly may include one or more heating elements, cooling elements, a humidity sensor, and an actuator. The heating element may be a resistance wire heater 106, the cooling element may be a thermoelectric cooler or a small compressor cooling unit, and humidity regulation may be achieved through desiccant, condensation dehumidification, or a humidifier. Through the coordinated operation of these components, the temperature and humidity within the containment chamber can be precisely controlled, providing a stable environment for Raman detection.

[0037] Raman detection components are used to acquire spectral data from samples. For example, a Raman detection component may include a laser source, a spectrometer, and a detector. The laser source emits a laser of a specific wavelength to illuminate the sample; the Raman signal scattered by the sample is transmitted through an optical system to the spectrometer for dispersion, and finally received by the detector and converted into an electrical signal, forming spectral data. This component enables rapid and non-destructive detection of oil and fat samples.

[0038] An autosampler is used to move samples onto the acquisition path of a Raman detection component. For example, an autosampler may include a sample stage and a drive mechanism. The sample stage can be designed to accommodate multiple sample containers, and the drive mechanism can be a stepper motor or a servo motor. By precisely controlling the movement of the motor, the samples on the sample stage are moved one by one to the laser focus of the Raman detection component, achieving automated, high-throughput sample detection.

[0039] Through a well-designed layout, this application integrates communication, temperature and humidity control, and automatic detection modules into a small, all-in-one device. Compared to the equipment required for traditional detection methods, this application is lower in cost, easier to use, and can quickly achieve high-throughput automatic screening of oil quality.

[0040] In some embodiments, the containment cavity includes a first inner cavity 101 and a second inner cavity 102. An environmental conditioning component is disposed in the first inner cavity 101, and a Raman detection component and an automatic sample introduction component are disposed in the second inner cavity 102. The first inner cavity 101 and the second inner cavity 102 are connected by a pair of circulating fans. The pair of circulating fans are used to drive the air in the containment cavity to circulate between the first inner cavity 101 and the second inner cavity 102 to regulate the temperature and humidity in the second inner cavity 102.

[0041] Specifically, such as Figure 2As shown, the receiving cavity is divided into a first inner cavity 101 and a second inner cavity 102. This division can be achieved by setting a physical partition 209 or forming functional zones. For example, a partition 209 can be used to divide the receiving cavity into two independent sub-chambers, or the airflow can be guided by the internal structural design to form two relatively independent areas. An environmental control component is located in the first inner cavity 101, which is responsible for regulating the temperature and humidity of the air. The environmental control component may include a cooler 104, a heater 106, a dehumidifier 105, etc., and its function is to process the air in the first inner cavity 101 according to preset parameters. The Raman detection component and the automatic sample introduction component are located in the second inner cavity 102, which is the core area for actual sample detection and processing. The Raman detection component is used to acquire spectral data of the sample, and the automatic sample introduction component is responsible for accurately moving the sample to the acquisition path of the Raman detection component. The first inner cavity 101 and the second inner cavity 102 are connected by a pair of circulating fans, which can be two independent fans or two fan units integrated in the same structure. For example, a small fan can be installed on the partition 209 between the first inner cavity 101 and the second inner cavity 102 to drive air circulation within the cavity. The function of this circulating fan is to drive the air within the cavity to form a closed circulation path between the first inner cavity 101 and the second inner cavity 102, thereby delivering the air regulated by the first inner cavity 101 to the second inner cavity 102, and drawing air back from the second inner cavity 102 to the first inner cavity 101 for further regulation. In this way, precise regulation and maintenance of temperature and humidity within the second inner cavity 102 can be achieved.

[0042] The solution proposed in this application effectively solves the problem of fluctuations in the detection environment and improves the accuracy of temperature and humidity control by dividing the containment cavity into a first inner cavity 101 and a second inner cavity 102 and combining it with a circulating fan to achieve air circulation. Specifically, the design of the containment cavity, including the first inner cavity 101 and the second inner cavity 102, isolates the environmental conditioning area and the detection area, reduces the direct intrusion of external interference into the second inner cavity 102, and ensures the independent and stable detection environment. The environmental conditioning component is located in the first inner cavity 101, which centrally controls the temperature and humidity, avoiding direct disturbance to the detection operation of the second inner cavity 102 during the adjustment process, and maintaining the constancy of the detection area. The Raman detection component and the automatic sample introduction component are located in the second inner cavity 102, which concentrates the sample detection and movement functions in an independent space, reducing the impact of environmental fluctuations on the detection process. The first inner cavity 101 and the second inner cavity 102 are connected by a pair of circulating fans, establishing an air circulation channel so that the regulated air can be effectively transferred. A pair of circulating fans drive air to circulate between the chambers, promoting uniform temperature and humidity distribution and rapid recovery. Ultimately, this regulates the temperature and humidity within the second inner chamber 102, ensuring environmental consistency in the detection area and supporting stable acquisition of Raman spectroscopy data. This structural layout allows the environmental conditioning process to be relatively independent of the detection process, reducing mutual interference, while forced circulation ensures the uniformity and stability of the detection area environment.

[0043] In some embodiments, the environmental control components include: a cooler 104, a dehumidifier 105, and a heater 106; The cooler 104 and the dehumidifier 105 are located on the side of the first inner cavity 101. A drain is provided below the cooler 104 and the dehumidifier 105 respectively. The drain is used to collect the condensate generated by the cooler 104 and the dehumidifier 105 and discharge the condensate out of the housing assembly. The radiator 108 of the cooler 104 is located on the outside of the housing assembly. The heater 106 is located on the lower side of the first inner cavity 101.

[0044] Specifically, the cooler 104 is used to lower the temperature inside the containment cavity, and can take the form of a semiconductor cooling chip, a small compression refrigerator, or an adsorption refrigeration device. The dehumidifier 105 is used to lower the humidity inside the containment cavity, and can be achieved through condensation dehumidification, adsorption dehumidification, or membrane separation dehumidification. The heater 106 is used to raise the temperature inside the containment cavity, and can take the form of a resistance wire heater, a PTC ceramic heater, or an infrared heater. These components together constitute the environmental control system, which can perform bidirectional and precise control of the temperature and humidity inside the containment cavity. The cooler 104 and the dehumidifier 105 are located on the side of the first inner cavity 101 to optimize the spatial layout, concentrating the main components that generate condensate in a specific area of ​​the first inner cavity 101, facilitating the collection and discharge of condensate, and providing convenience for air circulation within the first inner cavity 101. Drains are installed below the refrigerator 104 and dehumidifier 105 to collect condensate generated during refrigeration and dehumidification. These drains can include a collection tray with guide channels, a water storage box with a certain volume, or a funnel-shaped structure directly connected to an external drain pipe. The drains not only collect condensate but also drain it from the housing assembly. This can be achieved through gravity drainage, forced drainage with a small water pump, or by periodically replacing absorbent materials, effectively maintaining a dry environment inside the equipment. The radiator 108 of the refrigerator 104 is located on the outside of the housing assembly, effectively preventing heat generated during operation from flowing back into the cavity and affecting the efficiency and accuracy of temperature control. The radiator 108 can be an air-cooled heat sink, a liquid-cooled heat dissipation module, or a heat pipe. The heater 106 is located below the first inner cavity 101. It utilizes the principle of rising hot air to promote natural convection or assisted forced convection within the cavity, achieving a more uniform temperature distribution and helping to ensure stable heating of the entire cavity.

[0045] The rational configuration of the cooler 104, dehumidifier 105, and heater 106 enables precise and bidirectional control of temperature and humidity within the containment cavity. The drainers located below the cooler 104 and dehumidifier 105 effectively collect and drain condensate, fundamentally eliminating the potential hazards caused by condensate buildup and ensuring a dry and stable internal environment. This guarantees the effectiveness of humidity control and the long-term reliability of the equipment. The radiator 108 of the cooler 104 is located on the outside of the housing assembly, preventing heat accumulation and maintaining cooling efficiency. The heater 106, located on the lower side of the first inner cavity 101, combined with a pair of circulating fans, promotes uniform air convection within the containment cavity, ensuring that the grease sample in the second inner cavity 102 remains at a suitable liquid temperature throughout the detection process. This effectively prevents grease solidification from interfering with Raman spectroscopy results, significantly improving detection accuracy and consistency. This solution provides a stable and controllable ideal working environment for the Raman detection components, greatly improving the reliability of the grease detection equipment and the accuracy of the detection results.

[0046] In some embodiments, the automated sample delivery assembly includes: a cuvette sample holder 107 and a drive device; The cuvette sample holder 107 is positioned above the drive device. The cuvette sample holder 107 is provided with multiple sample slots 109. The drive device is used to drive the cuvette sample holder 107 to rotate so that one of them is aligned with the Raman detection component.

[0047] An automatic sample feeding assembly is a mechanism used to automatically deliver samples to the detection area for continuous or batch testing. It can be implemented using a rotating platform to carry the samples. A cuvette sample holder 107 is a structure used to hold and fix cuvettes (containing samples). This sample holder can be designed as a flat plate with multiple holes or a disc with multiple grooves, and its material can be corrosion-resistant and easy to clean, such as stainless steel, polytetrafluoroethylene, or specific engineering plastics. A drive unit is a mechanism used to provide power and control the movement of the cuvette sample holder 107. This drive unit can include stepper motors, servo motors, DC motors, etc., in conjunction with reducers, gear transmission mechanisms, or belt transmission mechanisms to achieve precise rotation or linear movement. Its control can be achieved through a microcontroller or dedicated drive circuitry. Multiple sample slots 109 are structural units on the cuvette sample holder 107 used to accommodate individual cuvettes. These sample slots 109 can be designed as circular holes, square slots, or U-shaped slots, and their size and shape match the cuvettes used. The cuvette can be securely held in place by a flexible clamping structure, such as a spring, rubber pad, or flexible clip. Multiple sample slots 109 are spaced apart circumferentially along the cuvette sample holder 107, meaning that these sample slots 109 are distributed uniformly or non-uniformly along the circumference of the cuvette sample holder 107. For example, the sample slots 109 can be arranged at equal angular intervals, with 8 or 12 sample slots evenly distributed on a circular sample holder; alternatively, they can be densely distributed in some areas and sparsely distributed in others, depending on specific detection requirements.

[0048] This application's solution optimizes the structure of the automated sample loading assembly to address efficiency issues in batch sample detection and reduce interference from the external environment on detection stability. Specifically, the automated sample loading assembly includes a cuvette sample holder 107 and a drive unit, with the cuvette sample holder 107 positioned above the drive unit. This direct layout ensures a stable connection between the sample holder and the drive unit, reducing vibration or offset during rotation and guaranteeing accurate sample positioning. The cuvette sample holder 107 has multiple sample slots 109 spaced circumferentially, allowing multiple samples to be loaded simultaneously and arranged in an orderly manner. When detection is required, the drive unit precisely rotates the cuvette sample holder 107, aligning one of the sample slots 109 to be tested accurately with the acquisition path of the Raman detection assembly. This automated rotation control eliminates the need for frequent manual intervention, significantly reducing the number of times the equipment is opened and closed, thereby maximizing the maintenance of the established stable temperature and humidity environment within the chamber. In this way, this solution enables continuous and rapid batch sample detection, improving detection efficiency and the reliability of high-throughput screening. This automatic detection turntable has a compact structure. A cylindrical cuvette holder with a sample slot 109 is mounted on an integrated drive and control motor. The slot has an elastic sheet that can radially press the cuvettes inserted into it, while not affecting the upward pulling of the cuvettes, facilitating quick and easy sample replacement. The motor movement is controlled by a software program to rotate the oil sample to be directly in front of the spectrometer probe 200, enabling rapid and automatic detection of batch samples.

[0049] In some embodiments, the Raman detection assembly includes: a spectrometer probe 200, a Raman spectrometer 201, and a support frame; The spectrometer probe 200 is positioned above the support frame and is directly opposite the cuvette sample holder 107. The Raman spectrometer 201 is electrically connected to the spectrometer probe 200 and is placed below the drive unit.

[0050] Specifically, the spectrometer probe 200 is positioned above the support frame, aiming to provide a stable mounting platform for the probe using the frame's stability. The probe 200 is directly opposite the cuvette sample holder 107, meaning the probe's detection optical axis is precisely aligned with the center of the sample on the cuvette sample holder 107. This is crucial for ensuring the accuracy of Raman spectroscopy acquisition. The Raman spectrometer 201 is electrically connected to the probe 200, meaning that signal and / or control information are transmitted between them via cable or photoelectric conversion interface. This ensures that the optical signals collected by the probe 200 can be received and processed by the Raman spectrometer 201 in real time. The Raman spectrometer 201 is placed below the drive unit, a space optimization strategy. Placing the relatively large Raman spectrometer 201 in the available space below the drive unit effectively utilizes the internal vertical space, making the overall structure more compact.

[0051] With the above structural layout, when the automatic sample feeding component drives the cuvette sample holder 107 to move the sample to be tested to the preset detection position, the spectrometer probe 200 can accurately align with the sample to acquire spectral data. The Raman scattering signal collected by the spectrometer probe 200 is transmitted in real time via electrical connection to the Raman spectrometer 201 located below for analysis and processing. This not only ensures the accuracy of spectral acquisition and the stability of signal transmission, but also, through optimized component placement, makes efficient use of the internal space of the equipment, thereby significantly improving the overall efficiency and reliability of the oil and fat testing equipment.

[0052] In some embodiments, a pair of circulating fans includes an inlet fan 203 and an outlet fan 204 arranged from top to bottom. The inlet fan 203 is used to drive air from the first inner cavity 101 into the second inner cavity 102, and the outlet fan 204 is used to drive air from the second inner cavity 102 into the first inner cavity 101.

[0053] A pair of circulating fans refers to two independent fan units whose primary function is to generate airflow to promote the flow and mixing of gases within a specific space. These fans can take various forms, such as axial fans, centrifugal fans, or crossflow fans, and the choice typically depends on the required airflow, air pressure, and installation space limitations. For example, two DC brushless axial fans can be used, which have advantages such as small size, low noise, and long lifespan, or two centrifugal fans can be used, which are more suitable when higher air pressure is required to overcome duct resistance.

[0054] The function of the intake fan 203 is to actively push air, which has been processed by the environmental conditioning components and has a specific temperature and humidity, from the first inner cavity 101 to the second inner cavity 102. This ensures that the conditioned air can effectively enter the sample detection area, providing a stable environment for Raman detection. The intake fan 203 can be a fan with a high airflow rate to ensure a sufficient air exchange rate. For example, it can be an axial flow fan installed at the outlet of the first inner cavity 101, or a centrifugal fan that directs airflow to the second inner cavity 102 through a deflector.

[0055] The function of the exhaust fan 204 is to draw air from the second inner cavity 102 back to the first inner cavity 101, forming a closed loop. This not only prevents air from stagnating in the second inner cavity 102, helping to maintain the uniformity of temperature and humidity in the second inner cavity 102, but also allows the air to be processed again by the environmental conditioning components, thereby achieving continuous temperature and humidity control. The exhaust fan 204 can be an airflow fan matched with the intake fan 203, for example, an axial fan installed at the return port of the second inner cavity 102, or a centrifugal fan that draws air into the first inner cavity 101.

[0056] Through the directional division of labor and synergistic action of the inlet fan 203 and the outlet fan 204, air achieves efficient and stable circulation between the first inner cavity 101 and the second inner cavity 102. This solves the problems of low airflow efficiency and uneven temperature and humidity distribution in traditional solutions, significantly improving the stability and consistency of the detection environment throughout the entire containment cavity, especially in the second inner cavity 102. This optimized air circulation mechanism, combined with the structural design of dividing the containment cavity into the first inner cavity 101 and the second inner cavity 102, allows the environmental conditioning components to process the air more centrally and efficiently, and precisely deliver the conditioned air to the detection area through directional circulation, thereby improving the overall performance and reliability of the grease detection equipment.

[0057] In some embodiments, a U-shaped frame 205 is provided above the cuvette sample holder 107: The U-shaped frame 205 surrounds the cuvette sample holder 107 and the spectrometer probe 200. The U-shaped frame 205 is located between the first inner cavity 101 and the second inner cavity 102. The U-shaped frame 205 is provided with a U-shaped inner cavity, an air inlet 206 and multiple air outlets 207. The air inlet 206 is used to install an air intake fan 203 to connect to the first inner cavity 101. The air inlet 206 connects to the U-shaped inner cavity. Multiple air outlets 207 connect to the U-shaped inner cavity, and some of the air outlets 207 face the cuvette sample holder 107, while the other part of the air outlets 207 face downwards to connect to the second inner cavity 102.

[0058] Specifically, this solution, based on the aforementioned oil testing equipment, such as... Figure 4As shown, a semi-isolated transition space is formed by placing a U-shaped frame 205 above the cuvette sample holder 107 and the spectrometer probe 200, and positioning it within the second inner cavity 102 and close to the first inner cavity 101. The U-shaped frame 205 has a U-shaped inner cavity as an airflow channel, and includes an air inlet 206 and multiple air outlets 207. Air regulated by the environmental control components in the first inner cavity 101 is introduced into the U-shaped inner cavity via the inlet fan 203 of a pair of circulating fans and the air inlet 206 of the U-shaped frame 205. Within the U-shaped inner cavity, the airflow is split; a portion of the regulated air is blown directly onto the cuvette sample holder 107 and the sample through the air outlets 207 facing the cuvette sample holder 107, maintaining stable temperature and humidity for the sample during detection, for example, preventing oil samples from solidifying due to temperature drops, thereby ensuring the accuracy of spectral detection. Another portion of the regulated air enters the remaining space of the second inner cavity 102 through the downward-facing air outlet 207 to maintain the temperature and humidity balance of the entire second inner cavity 102. Subsequently, the air in the second inner cavity 102 is sent back to the first inner cavity 101 through the outlet fan 204 of a pair of circulating fans, completing the entire circulation regulation process. Through the design of the U-shaped frame 205, when the equipment cover 211 is opened for sample replacement, the outside air mainly exchanges directly with the semi-isolated transition space formed by the U-shaped frame 205, and the impact on the temperature and humidity of most of the space in the second inner cavity 102 is significantly reduced. This mechanism of local isolation and directional airflow regulation allows the equipment to return to the set stable working environment conditions more quickly after the cover 211 is closed again, thereby ensuring high-throughput and comparable detection of batch samples under a consistent environment. Furthermore, since the interference with the overall environment of the second inner cavity 102 is minimized, the device can return to the preset working environment conditions more quickly after the sample is replaced and the cover 211 is closed again, which significantly shortens the waiting time and improves the detection efficiency and high-throughput screening capability.

[0059] In some embodiments, the housing assembly includes an outer shell 100 that encloses the receiving cavity, a partition 209 is provided on the spectrometer probe 200, the partition 209 and the U-shaped frame 205 enclose the cuvette sample holder 107 to form a detection cavity 210, the outer shell 100 is provided with a cover 211, the cover 211 is located directly above the detection cavity 210, and the partition 209 is used to prevent air from flowing from the detection cavity 210 into the second inner cavity 102 during the process of opening the cover 211 to take samples.

[0060] like Figure 1 and Figure 3As shown, the partition 209, together with the U-shaped frame 205, defines the boundary of the detection chamber 210 and acts as an airflow barrier under certain operating conditions. The detection chamber 210 is a partially enclosed space formed by the partition 209 and the U-shaped frame 205 enclosing the cuvette sample holder 107. This chamber is designed to provide a controlled local environment for the sample to be tested. The internal dimensions and shape of the detection chamber 210 are designed to accommodate the cuvette sample holder 107 and ensure that the sample is in a stable environmental condition during the detection process. The design of this chamber minimizes its internal air volume to facilitate rapid adjustment and stabilization of environmental parameters. The lid 211 is an openable component on the housing 100 that provides access to the detection chamber 210. The lid 211 can be hinged, sliding, or detachable, and typically uses a seal (e.g., a silicone gasket or rubber ring) when closed to provide a certain sealing effect. The cover 211 is positioned directly above the detection chamber 210. This layout optimizes operational convenience, allowing operators to directly access and remove samples from the detection chamber 210 from above. This design helps reduce potential interference to other areas of the equipment when changing samples. The core function of the partition 209 is to effectively prevent air (which may have already come into contact with outside air) inside the detection chamber 210 from flowing directly into the second inner cavity 102 when the cover 211 is opened for sample access. This is achieved through the physical blocking effect of the partition 209. For example, the partition 209 can be designed to fit tightly with the edge of the U-shaped frame 205 or form a stepped structure, thereby creating a relatively independent transition space between the detection chamber 210 and the second inner cavity 102 when the cover 211 is open, minimizing the impact of outside air on the temperature and humidity stability of the second inner cavity 102.

[0061] The oil and fat detection device of this application has a housing assembly with an internal cavity divided into a first inner cavity 101 and a second inner cavity 102. An environmental control assembly is located in the first inner cavity 101 and is responsible for regulating the temperature and humidity within the housing. A Raman detection assembly and an automatic sample loading assembly are located in the second inner cavity 102 and are used for spectral data acquisition and sample movement. A pair of circulating fans, including an inlet fan 203 and an outlet fan 204 arranged from top to bottom, drive the air in the housing to circulate between the first inner cavity 101 and the second inner cavity 102, thereby achieving precise regulation of the temperature and humidity in the second inner cavity 102. Based on this, the automatic sample loading assembly includes a cuvette sample holder 107 and a drive device. The cuvette sample holder 107 is provided with multiple sample slots 109, and the drive device is used to drive the cuvette sample holder 107 to rotate so that one of them is aligned with the spectrometer probe 200 of the Raman detection assembly. To further optimize the airflow path and detection environment, a U-shaped frame 205 is installed above the cuvette sample holder 107 and the spectrometer probe 200. This U-shaped frame 205 surrounds the cuvette sample holder 107 and the spectrometer probe 200 and is located between the first inner cavity 101 and the second inner cavity 102. Its internal structure includes a U-shaped inner cavity, an air inlet 206, and multiple air outlets 207 to guide the regulated airflow to other areas of the cuvette sample holder 107 and the second inner cavity 102. However, in the above solution, when samples need to be replaced, the operator usually needs to open the external cover 211 of the equipment, which may cause external air to directly enter the second inner cavity 102, thereby disrupting the established stable temperature and humidity environment and affecting the accuracy and consistency of the detection results. To address this, this application provides a partition 209 on the spectrometer probe 200, which, together with the U-shaped frame 205, encloses the cuvette sample holder 107 to form a detection cavity 210. Furthermore, the cover 211 on the outer casing 100 is located directly above the detection chamber 210. When the operator opens the cover 211 to handle sample loading and unloading, the partition 209 effectively prevents airflow from the detection chamber 210 into the second inner chamber 102. Specifically, the partition 209, in conjunction with the U-shaped frame 205, forms a semi-isolated transition space between the detection chamber 210 and the second inner chamber 102 when the cover 211 is open. This means that external air is only directly connected to this transition space and does not directly flow into the rest of the second inner chamber 102. In this way, the temperature and humidity environment of the second inner chamber 102 is kept as stable as possible, avoiding drastic fluctuations caused by frequent opening and closing. Once the cover 211 is closed again, due to the relatively small volume of the detection chamber 210, the internal environment can be restored to the set working conditions more quickly by the circulated and regulated air, thereby significantly shortening the time required for the equipment to stabilize and ensuring the efficiency and data consistency of continuous batch testing. This design cleverly solves the technical challenge of convenient sample replacement while maintaining a stable internal environment.

[0062] In some embodiments, the housing 100 is provided with heat-insulating material.

[0063] Thermal insulation materials are substances that effectively impede heat transfer. Their main function is to reduce heat conduction, convection, and radiation, thereby maintaining a stable internal or external temperature. In grease testing equipment, thermal insulation materials can be used to reduce the impact of external ambient temperature on the internal cavity, ensuring stable internal temperature and humidity. One approach is to use porous materials such as polyurethane foam, polystyrene foam, or glass wool, which contain a large amount of stagnant air, effectively reducing the thermal conductivity coefficient. Another approach is to use vacuum insulation panels, which eliminate internal air convection and conduction through vacuuming, providing extremely high insulation performance. Additionally, reflective insulation materials, such as aluminum foil or aluminized film, can be used to reduce heat transfer by reflecting thermal radiation.

[0064] In some embodiments, a power supply assembly 212 is also provided between the receiving cavity and the outer shell 100, and the power supply assembly 212 is connected to the environmental conditioning assembly, the Raman detection assembly and the automatic sample introduction assembly.

[0065] The power supply component 212 refers to the device that provides the necessary electrical energy to the various functional modules within the equipment. This power supply component 212 may include, but is not limited to, AC-DC conversion modules, DC-DC conversion modules, battery packs, and power management units. For example, it can be a power module integrating transformation, rectification, filtering, and voltage regulation functions, or a component composed of multiple independent power supply units to meet different voltage and current requirements. The power supply component 212 is positioned between the housing cavity and the outer casing 100. This arrangement utilizes non-core working space within the equipment, preventing the power supply component 212 from occupying the effective detection area within the housing cavity. This space can be a gap between the outer casing 100 and the housing cavity wall, a pre-reserved gap at the bottom or top, or a specially designed compartment within the housing assembly. The power supply component 212 connects to the environmental conditioning component, Raman detection component, and automatic sample introduction component to ensure that each functional component receives a stable and reliable power supply to perform its functions normally. Connection methods can include wire connections, ribbon cable connections, and PCB board integration connections. For example, the output of the power supply component 212 is electrically connected to the power input interfaces of the environmental conditioning component, the Raman detection component, and the autosampler component via a power supply harness.

[0066] The proposed solution integrates the power supply component 212 within the space between the housing cavity and the outer casing 100, electrically connecting it to the environmental conditioning component, Raman detection component, and autosampler component, thus forming a highly integrated oil and fat detection device. This structural layout cleverly utilizes the non-core working space within the device, avoiding the power supply component 212 occupying valuable detection area within the housing cavity, thereby maintaining the device's compact design. Simultaneously, the built-in power supply component 212 directly provides stable and reliable power to the environmental conditioning component, Raman detection component, and autosampler component, ensuring the accuracy of environmental conditioning, the stability of spectral data acquisition, and the smoothness of sample movement. This integrated power solution significantly reduces reliance on multiple external independent power adapters, simplifies external wiring, and improves the overall integration and portability of the device. Furthermore, the integrated design of the power supply component 212 eliminates the need for additional complex power cables during deployment and use, greatly simplifying the operation process and supporting rapid deployment and continuous use, effectively solving the problems of non-compact devices that hinder rapid deployment and use.

[0067] In some embodiments, the housing 100 is further provided with a cooling fan 213, which is located outside the power supply assembly 212 and is used to dissipate the heat generated by the power supply assembly 212.

[0068] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A grease testing device, characterized in that, include: Housing components, environmental control components, Raman detection components, and automated sample introduction components; The housing assembly has an internal receiving cavity; The environmental conditioning component, Raman detection component, and automatic sample introduction component are all housed in the containment cavity. The environmental conditioning component is used to regulate the temperature and humidity in the containment cavity, the Raman detection component is used to acquire spectral data of the sample, and the automatic sample introduction component is used to move the sample to the acquisition path of the Raman detection component.

2. The oil and fat testing equipment according to claim 1, characterized in that, The containment cavity includes a first inner cavity (101) and a second inner cavity (102). An environmental conditioning component is disposed in the first inner cavity (101), and a Raman detection component and an automatic sample introduction component are disposed in the second inner cavity (102). The first inner cavity (101) and the second inner cavity (102) are connected by a pair of circulating fans. The pair of circulating fans are used to drive the air in the containment cavity to circulate between the first inner cavity (101) and the second inner cavity (102) to regulate the temperature and humidity in the second inner cavity (102).

3. The oil and fat testing equipment according to claim 2, characterized in that, The environmental control components include: a cooler (104), a dehumidifier (105), and a heater (106). The cooler (104) and dehumidifier (105) are located on the side of the first inner cavity (101). A drain is provided below the cooler (104) and dehumidifier (105) respectively. The drain is used to collect the condensate generated by the cooler (104) and dehumidifier (105) and discharge the condensate into the housing assembly. The radiator (108) of the cooler (104) is located on the outside of the housing assembly. The heater (106) is located on the lower side of the first inner cavity (101).

4. The oil and fat testing equipment according to claim 1, characterized in that, The automated sample loading assembly includes: a cuvette sample holder (107) and a drive mechanism; The cuvette sample holder (107) is positioned above the driving device. The cuvette sample holder (107) is provided with multiple sample slots (109). The multiple sample slots (109) are arranged at circumferential intervals along the cuvette sample holder (107). The driving device is used to drive the cuvette sample holder (107) to rotate so that one of them is aligned with the Raman detection component.

5. The oil and fat testing equipment according to claim 4, characterized in that, The Raman detection assembly includes: a spectrometer probe (200), a Raman spectrometer (201), and a support frame; The spectrometer probe (200) is positioned above the support frame and is directly opposite the cuvette sample holder (107). The Raman spectrometer (201) is electrically connected to the spectrometer probe (200) and is placed below the drive unit.

6. The oil and fat testing equipment according to claim 5, characterized in that, A pair of circulating fans includes an inlet fan (203) and an outlet fan (204) arranged from top to bottom. The inlet fan (203) is used to drive air from the first inner cavity (101) into the second inner cavity (102), and the outlet fan (204) is used to drive air from the second inner cavity (102) into the first inner cavity (101).

7. The oil and fat testing equipment according to claim 6, characterized in that, A U-shaped frame (205) is provided above the cuvette sample holder (107): The U-shaped frame (205) surrounds the cuvette sample holder (107) and the spectrometer probe (200). The U-shaped frame (205) is located between the first inner cavity (101) and the second inner cavity (102). The U-shaped frame (205) is provided with a U-shaped inner cavity, an air inlet (206) and multiple air outlets (207). The air inlet (206) is used to install an air intake fan (203) to connect to the first inner cavity (101). The air inlet (206) connects to the U-shaped inner cavity. Multiple air outlets (207) connect to the U-shaped inner cavity, and some of the air outlets (207) face the cuvette sample holder (107), while the other part of the air outlets (207) face downwards to connect to the second inner cavity (102).

8. The oil and fat testing equipment according to claim 7, characterized in that, The housing assembly includes an outer shell (100) that encloses the receiving cavity. A partition (209) is provided on the spectrometer probe (200). The partition (209) and the U-shaped frame (205) enclose the cuvette sample holder (107) to form a detection cavity (210). The outer shell (100) is provided with a cover (211), which is located directly above the detection cavity (210). The partition (209) is used to prevent the air in the detection cavity (210) from flowing into the second inner cavity (102) during the process of opening the cover (211) to take or put in samples.

9. The oil and fat testing equipment according to claim 8, characterized in that, The outer casing (100) is provided with heat insulation material.

10. The oil and fat testing equipment according to claim 1, characterized in that, A power supply assembly (212) is also provided between the containment cavity and the outer shell (100), and the power supply assembly (212) is connected to the environmental conditioning assembly, the Raman detection assembly and the autosampler assembly.

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