An evaporative light scattering detector

Abstract

The utility model discloses a kind of evaporative light scattering detectors, a kind of evaporative light scattering detectors, including detection machine case, detection machine case is equipped with atomizing chamber, heating evaporation chamber, detection chamber in sequence;Atomizing chamber is equipped with atomizing device, the atomizing device includes the atomizer in the side wall of detection machine case, the head of atomizer is equipped with liquid inlet, the hexagonal gas pipe joint on the surface of atomizer, glass tube below atomizer;Heating evaporation chamber is equipped with heating evaporation device, and heating evaporation device includes spiral heating pipe in heating evaporation chamber, heat preservation component in heating evaporation chamber;Detection chamber is equipped with light path detection device.

Description

Technical Field

[0001] This invention belongs to the field of detector technology, and more specifically, relates to an evaporative light scattering detector. Background Technology

[0002] Evaporative light scattering (ELS) is a versatile detector capable of detecting any sample with lower volatility than the mobile phase, regardless of the presence of chromophores. ELS offers higher sensitivity than differential refractive index (DRI) detectors, is insensitive to temperature changes, and provides a stable baseline, making it suitable for coupling with gradient elution liquid chromatography. ELS is widely used for the detection of carbohydrates, lipids, fatty acids and amino acids, pharmaceuticals, and polymers. The unique detection principle of ELS involves atomizing the column eluent to form an aerosol, then evaporating the solvent in a heated drift tube. Finally, the remaining non-volatile solute particles are detected in a light scattering detection cell.

[0003] The Chinese patent database has published an invention patent with publication number CN207866768U entitled "An Evaporation Light Scattering Detection Device". However, the overall layout of the evaporation light scattering detector disclosed in this patent is not reasonable enough, and the problem of stable temperature control has not been solved. In particular, the temperature of the gas introduced into it cannot be stably controlled, which can easily affect the detection results and accuracy. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides an evaporative light scattering detector to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an evaporative light scattering detector, comprising a detection housing, wherein an atomization chamber, a heating evaporation chamber, and a detection chamber are sequentially arranged within the detection housing; the atomization chamber contains an atomizing device, which includes an atomizer located on the side wall of the detection housing, a liquid inlet at the head of the atomizer, a hexagonal gas pipe connector on the surface of the atomizer, a glass tube below the atomizer, and a heating shell on the surface of the atomizer; the heating evaporation chamber contains a heating evaporation device, which includes a spiral heating tube and a heat insulation component located within the heating evaporation chamber; the detection chamber contains an optical path detection device, which includes an optical chamber within the detection chamber, a laser above the optical chamber, an optical well below the optical chamber, and a photoelectric detector at the front end of the optical chamber; the heating evaporation chamber also contains a temperature control component, which includes a temperature sensor and a humidity sensor located within the heating evaporation chamber, and a gas flow controller at the inlet of the heating evaporation chamber.

[0006] Preferably, a power supply assembly is also provided above the heating evaporation chamber, and a control circuit board is provided above the power supply assembly.

[0007] Preferably, the surface of the testing chassis is also provided with a preparation diversion valve.

[0008] Preferably, the heat insulation component includes heat insulation cotton disposed in the heating evaporation chamber and sealing strips located at the inlet and outlet of the evaporation chamber at both ends.

[0009] Preferably, the end of the optical chamber is provided with an exhaust gas outlet leading to the outside of the detection chassis.

[0010] Preferably, the testing chassis has a fixedly connected heat dissipation mounting bracket on the side near the testing chamber, and the heat dissipation mounting bracket is equipped with a heat dissipation fan facing the testing chamber, power supply components and control circuit board.

[0011] Preferably, a touch screen is provided above the atomization chamber, which is electrically connected to the power supply component, the control circuit board, and the temperature control component. The touch screen is fixedly installed on the surface of the testing chassis by sheet metal parts and the touch screen panel is tilted.

[0012] Preferably, the atomizer is a centrifugal pressure nozzle.

[0013] This invention provides an evaporative light scattering detector, which has the following advantages:

[0014] 1. The detector has a compact overall appearance, does not take up much space, has a reasonable internal layout, and is easy to use. The improved atomizer nozzle has enhanced the precision and stability of atomization. The heating shell on the surface of the atomizer can improve the atomization efficiency. The temperature control component in the heating evaporation chamber can flexibly and effectively control the air intake flow according to the specific internal temperature and humidity conditions. The internal heat insulation component reduces internal heat loss and improves the heating evaporation effect, providing reliable support for the subsequent detection accuracy.

[0015] 2. The device is equipped with a flow divider valve, which can control and adjust the flow rate of the liquid to be detected according to the specific detection scenario, thus meeting the usage requirements.

[0016] 3. The device is equipped with a heat dissipation component, which improves the heat dissipation of the internal electronic components through a cooling fan, ensuring the stability of the equipment operation and extending its service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 4This is a schematic diagram of the internal structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the internal structure of this utility model.

[0022] In the diagram, 1. Detection chassis; 2. Atomization chamber; 3. Heating and evaporation chamber; 4. Detection chamber; 5. Atomizer; 6. Liquid inlet; 7. Hexagonal gas pipe connector; 8. Glass tube; 9. Spiral heating tube; 10. Insulation component; 11. Thermal insulation cotton; 12. Sealing strip; 13. Power supply component; 14. Control circuit board; 15. Heat dissipation mounting bracket; 16. Heat dissipation fan; 17. Optical chamber; 18. Laser; 19. Touch screen; 20. Preparation diversion valve; 21. Gas flow controller; 22. Temperature sensor; 23. Humidity sensor; 24. Heating shell; 25. Optical well; 26. Photodetector; 27. Exhaust gas outlet. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figures 1 to 5This utility model provides a technical solution: an evaporative light scattering detector, including a detection housing 1, and an atomization chamber 2, a heating evaporation chamber 3, and a detection chamber 4 arranged sequentially inside the detection housing 1. The atomization chamber 2 is equipped with an atomizing device, which includes an atomizer 5 located on the side wall of the detection housing 1. The atomizer 5 has a liquid inlet 6 at its head, a hexagonal air pipe connector 7 on its surface, and a glass tube 8 below the atomizer 5. The atomizer 5 uses a centrifugal pressure nozzle, and a heating shell 24 is provided on its surface.

[0027] A heating and evaporation device is installed inside the heating and evaporation chamber 3. The heating and evaporation device includes a spiral heating tube 9 and a heat insulation component 10 located inside the heating and evaporation chamber 3. A temperature control component is also installed inside the heating and evaporation chamber 3. The temperature control component includes a temperature sensor 22 and a humidity sensor 23 located inside the heating and evaporation chamber 3, and a gas flow controller 21 located at the inlet of the heating and evaporation chamber 3. The heat insulation component 10 includes heat insulation cotton 11 installed inside the heating and evaporation chamber 3 and sealing strips 12 located at the inlet and outlet of the evaporation chamber at both ends. A power supply component 13 is also installed above the heating and evaporation chamber 3, and a control circuit board 14 is installed above the power supply component 13. A heat dissipation mounting bracket 15 is fixedly connected to the side of the detection chamber 4 inside the detection housing 1. A heat dissipation fan 16 is installed on the heat dissipation mounting bracket 15 facing the detection chamber 4, the power supply component 13, and the control circuit board 14.

[0028] The detection chamber 4 is equipped with an optical path detection device, which includes an optical chamber 17 located in the detection chamber 4, a laser 18 located above the optical chamber 17, an optical well 25 located below the optical chamber 17, a photodetector 26 located at the front end of the optical chamber 17, and an exhaust gas outlet 27 located at the end of the optical chamber 17 leading to the outside of the detection housing 1.

[0029] Above the atomization chamber 2 is a touch screen 19 that is electrically connected to the power supply assembly 13, the control circuit board 14, and the temperature control assembly. The touch screen 19 is installed at an angle on the surface of the detection chassis 1 for easy operation and use by the user.

[0030] The specific usage and function of this embodiment: The detection liquid enters through the inlet 6 and is atomized into mist droplets by the atomizer 5. The centrifugal pressure nozzle ensures that the resulting droplets are uniform and fine, improving uniformity and reducing waste, thus guaranteeing the atomization effect. Furthermore, the heating shell on the surface of the atomizer further heats the gas, improving atomization stability. The liquid then enters the heating evaporation chamber 3 through the glass tube 8, where it is heated by the internal spiral heating tube 9, causing the mist droplets to evaporate and form the dry particle progress detection chamber 4. The dry particles are then irradiated by the laser 18, generating scattered light. The photodetector 26 detects and processes the received signal into an electrical signal, which is then transmitted to the intelligent PC. The remaining light signals are absorbed by the lower optical well, providing data for the operator. The temperature control component located inside the heating evaporation chamber 3 can promptly monitor the internal temperature and humidity. Operators can then flexibly adjust the droplet inflow rate according to actual needs. Internal heat insulation components reduce internal heat loss, ensuring heating and evaporation efficiency and providing reliable support for subsequent detection accuracy.

[0031] The detector is also equipped with a flow divider valve 20, which can control and adjust the flow rate of the detected liquid according to the specific detection scenario, thus meeting the usage requirements.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An evaporative light scattering detector, comprising a detection housing (1), characterized in that: The detection chamber (1) is provided with an atomizing chamber (2), a heating and evaporating chamber (3), and a detection chamber (4) in sequence. The atomizing chamber (2) is provided with an atomizing device, which includes an atomizer (5) located on the side wall of the detection chamber (1), an inlet (6) at the head of the atomizer (5), a hexagonal air pipe connector (7) on the surface of the atomizer (5), a glass tube (8) below the atomizer (5), and a heating shell (24) on the surface of the atomizer (5). The heating and evaporating chamber (3) is provided with a heating and evaporating device, which includes a spiral heating tube (9) located in the heating and evaporating chamber (3). A heat preservation component (10) is provided in the heating evaporation chamber (3); an optical path detection device is provided in the detection chamber (4), the optical path detection device includes an optical chamber (17) located in the detection chamber (4), a laser (18) located above the optical chamber (17), an optical well (25) located below the optical chamber (17), and a photoelectric detector (26) located at the front end of the optical chamber (17); a temperature control component is also provided in the heating evaporation chamber (3), the temperature control component includes a temperature sensor (22) and a humidity sensor (23) located in the heating evaporation chamber (3), and a gas flow controller (21) located at the inlet of the heating evaporation chamber (3).

2. The evaporative light scattering detector according to claim 1, characterized in that: A power supply assembly (13) is also provided above the heating evaporation chamber (3), and a control circuit board (14) is provided above the power supply assembly (13).

3. The evaporative light scattering detector according to claim 1, characterized in that: The surface of the testing chassis (1) is also connected to a preparation diversion valve (20).

4. The evaporative light scattering detector according to claim 1, characterized in that: The heat insulation component (10) includes heat insulation cotton (11) installed in the heating evaporation chamber (3) and sealing strips (12) located at the inlet and outlet of the evaporation chamber at both ends.

5. The evaporative light scattering detector according to claim 1, characterized in that: The end of the optical chamber (17) is provided with an exhaust gas outlet (27) leading to the outside of the detection housing (1).

6. The evaporative light scattering detector according to claim 2, characterized in that: The testing chassis (1) has a fixed heat dissipation mounting bracket (15) on the side near the testing chamber (4), and the heat dissipation mounting bracket (15) is provided with a heat dissipation fan (16) facing the testing chamber (4), the power supply assembly (13) and the control circuit board (14).

7. The evaporative light scattering detector according to claim 2, characterized in that: Above the atomizing chamber (2) is a touch screen (19) electrically connected to the power supply assembly (13), control circuit board (14) and temperature control assembly. The touch screen (19) is fixedly installed on the surface of the detection chassis (1) by sheet metal parts and the panel of the touch screen (19) is tilted.

8. The evaporative light scattering detector according to claim 2, characterized in that: The atomizer (5) is a centrifugal pressure nozzle.

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