Single-light-path ozone detection cavity

Abstract

The utility model provides a single-light-path ozone detection cavity, which belongs to the technical field of ozone detection cavities and is sequentially provided with a pre-amplification plate, a pre-amplification plate fixing part, a filter chamber, a transition chamber and a lamp chamber from front to back, and a quartz lens and a sealing ring are arranged on one side, close to the pre-amplification plate fixing part, of the filter chamber. An air inlet is formed in the top of the filter chamber, an electromagnetic valve is arranged on the side wall of the filter chamber, an exchange pipe, a detection pipe and a zero marking pipe are arranged between the filter chamber and the transition chamber, the sealing rings are arranged at the contact positions of the detection pipe and the zero marking pipe with the filter chamber and the transition chamber, and an air outlet is formed in the side wall of the transition chamber. A quartz lens and a sealing ring are arranged on one side, close to the lamp chamber, of the transition chamber, the transition chamber is fixedly connected with the lamp chamber through a fixing plate, an ultraviolet lamp is arranged at the top of the lamp chamber, and a heating resistor and a temperature sensor are arranged on the side wall of the lamp chamber.

Description

Technical Field

[0001] The utility model belongs to the technical field of ozone detection cavities, and in particular relates to a single-light-path ozone detection cavity. Background Art

[0002] Ozone (O3), an allotrope of oxygen, plays a vital role in environmental monitoring, water treatment, chemical production, healthcare and other fields due to its strong oxidizing properties and unique chemical properties. In particular, the ozone detection cavity has become one of the key technologies to achieve this goal in terms of accurate measurement of ozone concentration. The detection cavity is a container for holding and measuring gas samples. The ozone concentration is determined by analyzing the absorption of light of a specific wavelength by the gas in the cavity. Traditional detection cavity design, especially in the application of dual-optical path structure, can provide a certain degree of measurement accuracy, but it has some inherent limitations and challenges.

[0003] Traditional ozone concentration monitors, particularly those using a dual-optical path architecture, are based on the ultraviolet absorption method. This method utilizes ozone's high absorption rate of specific wavelengths of ultraviolet light to measure concentration. However, the dual-optical path architecture determines ozone concentration by comparing changes in light intensity between the sample and reference optical paths. This design aims to reduce the influence of external environmental factors on measurement results. However, this architecture also presents several significant issues: Difficulty in ensuring optical path consistency: Because two independent optical signal acquisition paths are used, even under optimal conditions, it is difficult to ensure perfect alignment of the two optical signals. These factors, including slight variations in light source intensity, optical path length, and individual differences in optical components, can all lead to deviations in measurement results. Sensor performance variations: The dual-optical path architecture requires two independent optical signal sensors, and subtle differences in performance, such as sensitivity, response speed, and linearity, can exist between different sensors. These variations can further exacerbate measurement errors. Zero drift: In a dual-optical path architecture, changes in either optical signal path, whether due to fluctuations in light source intensity or changes in sensor performance, can cause the instrument's zero value to drift, affecting measurement accuracy and stability. System complexity and cost: The dual-optical path design increases the complexity of the system, requiring not only more optical components and sensors but also more precise calibration and maintenance, which undoubtedly increases the cost and operational difficulty of the equipment. Utility Model Content

[0004] In view of this, the present invention provides a single-light-path ozone detection cavity, which solves the disadvantage of the traditional dual-light-path structure that it cannot ensure the consistency of the two light signals due to the use of two light signals for collection.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a single-optical path ozone detection cavity, wherein a preamplifier plate, a preamplifier plate fixing part, a filter chamber, a transition chamber, and a lamp chamber are sequentially arranged from front to back, a quartz lens and a sealing ring are arranged on the side of the filter chamber close to the preamplifier plate fixing part, and there are multiple quartz lenses and sealing rings. An air inlet is arranged on the top of the filter chamber, and a solenoid valve is arranged on the side wall of the filter chamber. An exchange tube, a detection tube, and a zeroing tube are arranged between the filter chamber and the transition chamber, and the sealing ring is arranged at the contact position between the detection tube, the zeroing tube, the filter chamber, and the transition chamber, and an air outlet is arranged on the side wall of the transition chamber. The quartz lens and the sealing ring are arranged on the side of the transition chamber close to the lamp chamber, and the transition chamber is fixedly connected to the lamp chamber through a fixing plate. An ultraviolet lamp is arranged on the top of the lamp chamber, and a heating resistor and a temperature sensor are arranged on the side wall of the lamp chamber.

[0007] By adopting a single-channel architecture, this core shift means the entire system shares a single UV photoelectric sensor. This strategic adjustment fundamentally avoids the systematic errors caused by the difference in signals from two independent optical paths in the previous dual-channel architecture, significantly enhancing measurement consistency and reliability.

[0008] To further enhance system accuracy and ensure light source stability, a temperature control mechanism is incorporated into the lamp chamber assembly. Specifically, the addition of a heating resistor, supplemented by a high-precision temperature sensor, creates a closed-loop temperature control system. The ingenuity of this design lies in its ability to monitor and automatically adjust the lamp chamber temperature to a preset ideal state in real time. This effectively prevents UV light intensity instability caused by temperature fluctuations, thereby avoiding the resulting system errors and ensuring stable light source output and accurate measurement results.

[0009] In summary, by adopting a single-channel architecture and strengthening the temperature control of the lamp chamber, not only the system structure is simplified and potential sources of error are reduced, but the working efficiency of the UV photoelectric sensor is also significantly improved, laying a solid foundation for the accurate detection of ozone concentration.

[0010] On the basis of the above technical solution, the single-light-path ozone detection cavity of the present invention can also be improved as follows:

[0011] The quartz lens includes a No. 1 lens and a No. 2 lens. The No. 1 lens is located inside the transition chamber, and the No. 2 lens is located inside the filter chamber.

[0012] Furthermore, the sealing ring includes a No. 1 sealing ring, a No. 2 sealing ring, a No. 3 sealing ring, a No. 4 sealing ring, a No. 5 sealing ring, and a No. 6 sealing ring. The No. 1 sealing ring is located inside the transition chamber, the No. 2 sealing ring is located inside the filter chamber, the No. 3 sealing ring and the No. 4 sealing ring are respectively located on both sides of the detection tube, and the No. 5 sealing ring and the No. 6 sealing ring are respectively located on both sides of the zeroing tube.

[0013] Furthermore, the detection tube is located on the side wall of the filter chamber and the transition chamber, the zeroing tube is located on the side wall of the filter chamber and the transition chamber, and the detection tube is located above the zeroing tube.

[0014] Furthermore, one side of the exchange tube is fixedly connected to the air inlet, and the other side is connected to the top position of the transition chamber, and the exchange tube is located above the detection tube.

[0015] Furthermore, the heating resistor is located at the top of the rear side of the side wall of the lamp chamber.

[0016] Furthermore, the temperature sensor is located at the bottom left side of the lamp chamber side wall.

[0017] Furthermore, the solenoid valve is located on the left side of the side wall of the filter chamber.

[0018] The beneficial effect of adopting the above-mentioned improvement scheme is that the switching of the detection tube and the zeroing tube through the high-frequency electromagnetic valve can ensure the stability of the instrument zero point.

[0019] Furthermore, the air outlet is located on the left side of the side wall of the transition chamber.

[0020] Furthermore, the No. 1 sealing ring is arranged on the outside of the No. 1 lens, and the inner diameter of the No. 1 sealing ring is equal to the diameter of the No. 1 lens. The No. 2 sealing ring is located on the outside of the No. 2 lens, and the inner diameter of the No. 2 sealing ring is equal to the diameter of the No. 2 lens. The inner diameters of the No. 3 sealing ring and the No. 4 sealing ring are equal to the outer diameter of the detection tube, and the inner diameters of the No. 5 sealing ring and the No. 6 sealing ring are equal to the outer diameter of the zeroing tube.

[0021] Compared with the prior art, the single-light-path ozone detection cavity provided by the present invention has the following beneficial effects:

[0022] Enhanced zero point stability: Through the dynamic zero point calibration mechanism, the utility model can continuously update the zero point value, effectively avoiding the problem of zero point drift in the traditional dual optical path structure, and ensuring the long-term stability and reliability of the measurement results;

[0023] Eliminate systematic errors: The single optical path structure eliminates the systematic errors caused by the inconsistency of the two optical signals in the dual optical path design, thus improving the accuracy of measurement.

[0024] Simplified system structure: Compared with the dual-optical path structure, the single-optical path design reduces the number of required optical components and sensors, reduces system complexity and cost, and is also easier to maintain and calibrate;

[0025] Improved response speed and accuracy: The fast switching mechanism of the high-frequency solenoid valve, combined with precise temperature control, enables the utility model to complete a complete zero point calibration and concentration measurement process within 0.15 seconds, greatly improving the response speed and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 This is a diagram of the components of a single-light-path ozone detection cavity;

[0028] Figure 2 This is an assembly diagram of a single-light-path ozone detection cavity;

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 10. Preamplifier board; 11. Preamplifier board fixings; 21. Lens No. 1; 22. Lens No. 2; 31. Sealing ring No. 1; 32. Sealing ring No. 2; 33. Sealing ring No. 3; 34. Sealing ring No. 4; 35. Sealing ring No. 5; 36. Sealing ring No. 6; 40. Filter chamber; 41. Air inlet; 42. Solenoid valve; 43. Exchange tube; 44. Detection tube; 45. Zeroing tube; 46. Transition chamber; 47. Air outlet; 48. Fixing plate; 50. Lamp chamber; 51. UV lamp; 52. Heating resistor; 53. Temperature sensor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0032] like Figure 1 、 Figure 2As shown, it is a first embodiment of a single-path ozone detection chamber provided by the utility model. In this embodiment, a preamplifier board 10, a preamplifier board fixing part 11, a filter chamber 40, a transition chamber 46, and a lamp chamber 50 are sequentially arranged from front to back. A quartz lens and a sealing ring are arranged on the side of the filter chamber 40 close to the preamplifier board fixing part 11. There are multiple quartz lenses and sealing rings. An air inlet 41 is arranged on the top of the filter chamber 40, and a solenoid valve 42 is arranged on the side wall of the filter chamber 40. The filter chamber 40 and the An exchange tube 43, a detection tube 44, and a zeroing tube 45 are arranged between the transition chamber 46. Sealing rings are provided at the contact positions of the detection tube 44, the zeroing tube 45 with the filter chamber 40 and the transition chamber 46. An air outlet 47 is provided on the side wall of the transition chamber 46. A quartz lens and a sealing ring are provided on the side of the transition chamber 46 close to the lamp chamber 50. The transition chamber 46 is fixedly connected to the lamp chamber 50 through a fixing plate 48. An ultraviolet lamp 51 is provided on the top of the lamp chamber 50, and a heating resistor 52 and a temperature sensor 53 are provided on the side wall of the lamp chamber 50.

[0033] UV lamp:

[0034] For the UV absorption method to detect ozone concentration, a UV light source with a specific wavelength is required. Typically, these UV lamps emit strong UV rays around 254nm because ozone has a high absorption coefficient in this band.

[0035] Reference Model:

[0036] Heraeus Noblelight's HNS series (e.g. HNS100-100);

[0037] Ushio's UV series (such as Ushio UV 254nm bulb);

[0038] Fusions UV's Fusion UV series (e.g. Fusion UV H series).

[0039] The solenoid valve is used to control the gas flow direction and realize rapid switching between the detection tube and the zeroing tube.

[0040] Reference Model:

[0041] SMC Corporation's VQ3100 series (suitable for high-speed switching and high reliability);

[0042] Festo's MPY series miniature solenoid valves (suitable for compact spaces and high-speed switching);

[0043] Parker Hannifin's NV Series solenoid valves (available in a variety of interface and voltage options).

[0044] In the above technical solution, the quartz lens includes a No. 1 lens 21 and a No. 2 lens 22 . The No. 1 lens 21 is located inside the transition chamber 46 , and the No. 2 lens 22 is located inside the filter chamber 40 .

[0045] Furthermore, in the above technical solution, the sealing ring includes sealing ring No. 1 31, sealing ring No. 2 32, sealing ring No. 33, sealing ring No. 4 34, sealing ring No. 5 35, and sealing ring No. 6 36. Sealing ring No. 1 31 is located inside the transition chamber 46, sealing ring No. 2 32 is located inside the filter chamber 40, sealing ring No. 33 and sealing ring No. 4 34 are respectively located on both sides of the detection tube 44, and sealing ring No. 5 35 and sealing ring No. 6 36 are respectively located on both sides of the zeroing tube 45.

[0046] Furthermore, in the above technical solution, the detection tube 44 is located on the side walls of the filter chamber 40 and the transition chamber 46 , the zeroing tube 45 is located on the side walls of the filter chamber 40 and the transition chamber 46 , and the detection tube 44 is located above the zeroing tube 45 .

[0047] Furthermore, in the above technical solution, one side of the exchange tube 43 is fixedly connected to the air inlet 41 , and the other side is connected to the top position of the transition chamber 46 , and the exchange tube 43 is located above the detection tube 44 .

[0048] Furthermore, in the above technical solution, the heating resistor 52 is located at the top of the rear side of the side wall of the lamp chamber 50 .

[0049] The heating resistor is used to maintain a constant temperature in the lamp chamber to prevent temperature fluctuations from affecting the performance of the UV lamp.

[0050] Reference Model:

[0051] Watlow Heating tape (e.g. Flexten 201 series);

[0052] Omega Engineering's CL-SS series of stainless steel heaters;

[0053] Miniature Ceramic Heaters from CCI Thermal Technologies (e.g. Mini-Ceramic 25W).

[0054] Furthermore, in the above technical solution, the temperature sensor 53 is located at the bottom left side of the side wall of the lamp chamber 50 .

[0055] The temperature sensor is used to monitor and control the temperature of the lamp chamber to ensure the stability of the light source and extend its service life.

[0056] Reference Model:

[0057] Texas Instruments' TMP117 (a high-precision digital temperature sensor);

[0058] Analog Devices' ADT7410 (an integrated temperature sensor with digital output);

[0059] Maxim Integrated's MAX6675 (K-type thermocouple interface for higher temperature range).

[0060] Furthermore, in the above technical solution, the solenoid valve 42 is located on the left side of the side wall of the filter chamber 40 .

[0061] Furthermore, in the above technical solution, the air outlet 47 is located on the left side of the side wall of the transition chamber 46 .

[0062] Furthermore, in the above technical solution, the No. 1 sealing ring 31 is arranged on the outside of the No. 1 lens 21, and the inner diameter of the No. 1 sealing ring 31 is equal to the diameter of the No. 1 lens 21; the No. 2 sealing ring 32 is located on the outside of the No. 2 lens 22, and the inner diameter of the No. 2 sealing ring 32 is equal to the diameter of the No. 2 lens 22; the inner diameters of the No. 3 sealing ring 33 and the No. 4 sealing ring 34 are equal to the outer diameter of the detection tube 44; the inner diameters of the No. 5 sealing ring 35 and the No. 6 sealing ring 36 are equal to the outer diameter of the zeroing tube 45.

[0063] Specifically, the principle of the present utility model is:

[0064] This utility model proposes a single-light-path ozone detection chamber. The core of this design is to simplify the traditional dual-light-path structure into a single light path, while introducing a dynamic zero-point calibration mechanism to improve measurement accuracy and stability. Specifically, the detection chamber is divided into three key components: the detection tube, the zeroing tube, and the exchange tube. The order and method of gas flow through these components are carefully designed to achieve efficient and accurate concentration measurement.

[0065] Detection tube: mainly used for actual measurement of ozone concentration. The gas sample is irradiated with ultraviolet light here, and the ozone concentration is calculated based on the degree of ultraviolet absorption;

[0066] Zeroing tube: specially used for collecting and analyzing zero-point gas, that is, gas containing no or very low concentration of ozone, as a benchmark for concentration measurement;

[0067] Exchange tube: responsible for the rapid switching of the gas path, controlling the gas flow direction through a high-frequency solenoid valve to ensure that zero point calibration and actual measurement are performed alternately during the detection process;

[0068] In addition, in order to further improve the measurement accuracy, the utility model also integrates a heating resistor and a temperature sensor in the lamp chamber to maintain the constant temperature of the lamp chamber, reduce the changes in ultraviolet light intensity caused by temperature fluctuations, and thus reduce system errors.

Claims

1. A single optical path ozone detection cavity, characterized in that: From front to back, a preamplifier plate (10), a preamplifier plate fixing member (11), a filter chamber (40), a transition chamber (46), and a lamp chamber (50) are sequentially arranged. A quartz lens and a sealing ring are arranged on one side of the filter chamber (40) close to the preamplifier plate fixing member (11). There are multiple quartz lenses and sealing rings. An air inlet (41) is arranged on the top of the filter chamber (40). A solenoid valve (42) is arranged on the side wall of the filter chamber (40). An exchange tube (43), a detection tube (44), and a zeroing tube are arranged between the filter chamber (40) and the transition chamber (46). (45), the sealing ring is provided at the contact position between the detection tube (44), the zeroing tube (45) and the filter chamber (40) and the transition chamber (46), the side wall of the transition chamber (46) is provided with an air outlet (47), the quartz lens and the sealing ring are provided on the side of the transition chamber (46) close to the lamp chamber (50), the transition chamber (46) is fixedly connected to the lamp chamber (50) through a fixing plate (48), an ultraviolet lamp (51) is provided on the top of the lamp chamber (50), and a heating resistor (52) and a temperature sensor (53) are provided on the side wall of the lamp chamber (50).

2. A single-light-path ozone detection cavity according to claim 1, characterized in that: The quartz lens comprises a first lens (21) and a second lens (22), wherein the first lens (21) is located inside the transition chamber (46), and the second lens (22) is located inside the filter chamber (40).

3. The single-light-path ozone detection cavity according to claim 2, characterized in that: The sealing rings include a No. 1 sealing ring (31), a No. 2 sealing ring (32), a No. 3 sealing ring (33), a No. 4 sealing ring (34), a No. 5 sealing ring (35), and a No. 6 sealing ring (36). The No. 1 sealing ring (31) is located inside the transition chamber (46), the No. 2 sealing ring (32) is located inside the filter chamber (40), the No. 3 sealing ring (33) and the No. 4 sealing ring (34) are respectively located on both sides of the detection tube (44), and the No. 5 sealing ring (35) and the No. 6 sealing ring (36) are respectively located on both sides of the zeroing tube (45).

4. The single-light-path ozone detection cavity according to claim 3, characterized in that: The detection tube (44) is located on the side walls of the filter chamber (40) and the transition chamber (46), the zeroing tube (45) is located on the side walls of the filter chamber (40) and the transition chamber (46), and the detection tube (44) is located above the zeroing tube (45).

5. The single-light-path ozone detection cavity according to claim 4, characterized in that: One side of the exchange tube (43) is fixedly connected to the air inlet (41), and the other side is connected to the top position of the transition chamber (46). The exchange tube (43) is located above the detection tube (44).

6. The single-light-path ozone detection cavity according to claim 5, characterized in that: The heating resistor (52) is located at the top of the rear side of the side wall of the lamp chamber (50).

7. The single-light-path ozone detection cavity according to claim 6, characterized in that: The temperature sensor (53) is located at the left bottom of the side wall of the lamp chamber (50).

8. The single-light-path ozone detection cavity according to claim 7, characterized in that: The solenoid valve (42) is located on the left side of the side wall of the filter chamber (40).

9. The single-light-path ozone detection cavity according to claim 8, characterized in that: The air outlet (47) is located on the left side of the side wall of the transition chamber (46).

10. The single-light-path ozone detection cavity according to claim 9, characterized in that: The No. 1 sealing ring (31) is arranged on the outside of the No. 1 lens (21), and the inner diameter of the No. 1 sealing ring (31) is equal to the diameter of the No. 1 lens (21). The No. 2 sealing ring (32) is located on the outside of the No. 2 lens (22), and the inner diameter of the No. 2 sealing ring (32) is equal to the diameter of the No. 2 lens (22). The inner diameters of the No. 3 sealing ring (33) and the No. 4 sealing ring (34) are equal to the outer diameter of the detection tube (44). The inner diameters of the No. 5 sealing ring (35) and the No. 6 sealing ring (36) are equal to the outer diameter of the zeroing tube (45).

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