PMT detection device
Through the heat dissipation system combining high thermal conductivity copper plate and refrigeration sheet, the problem of low heat dissipation efficiency of photomultiplier tubes in high temperature environments is solved, and stable operation and data accuracy are achieved in harsh environments.
Patent Information
- Application Number
- CN202421750436.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the prior art, the photomultiplier tube has low heat dissipation efficiency in harsh or high temperature environments and cannot effectively cool down, resulting in inaccurate data of the photomultiplier tube.
A heat dissipation system with a combination of high-thermal conductivity copper plates and refrigeration sheets is adopted, combined with a heat sink, heat is stored through high-thermal conductivity copper plates, and a stable temperature of the PMT detector is maintained at about 7°C with an external insulation sleeve for temperature insulation.
It realizes effective cooling of the photomultiplier tube in a high temperature environment, ensures its stable working temperature at around 7℃, and ensures data accuracy.
Smart Images
Figure CN223308076U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ambient air detection, and in particular relates to a PMT detection device. Background Art
[0002] The photomultiplier tube is a precision instrument that requires an ambient temperature of around 7°C to make the data more accurate. Since the cooling requirements cannot be met in harsh or high-temperature detection environments, these factors need to be addressed. The original technology used a heat sink to control the temperature of the PMT detector inside the photomultiplier tube. The heat dissipation efficiency of a single heat sink is low, and the efficiency of heat conduction is also poor. Therefore, cooling cannot be guaranteed and it is easy to cause optical interference to the internal photomultiplier tube. In order to solve the problem of heat dissipation and cooling, the utility model not only uses a heat sink but also adds a high thermal conductivity copper plate to improve the heat dissipation efficiency, and also has an outstanding effect in terms of heat insulation.
[0003] In view of this, the present utility model is proposed. Utility Model Content
[0004] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:
[0005] A PMT detection device includes a high-temperature reaction chamber, an outer envelope, and a PMT detector arranged in the outer envelope. The high-temperature reaction chamber is fixedly arranged on the top wall of the outer envelope, and a first through hole is opened on the outer envelope to connect the outer envelope with the high-temperature reaction chamber; an inner sleeve for fixing the PMT detector is also provided in the outer envelope, and a first cooling fin is fixedly provided at the end of the inner sleeve, a high-thermal conductivity copper plate is fixedly provided on one side wall of the first cooling fin, a second cooling fin is fixedly provided on the other side wall of the high-thermal conductivity copper plate, and a heat sink is fixedly provided on the outer wall of the second cooling fin.
[0006] As a preferred embodiment of the present invention, the high thermal conductivity copper plate is fixed to the wall of one end of the outer sealing tube, the inner sleeve is fixed in the cavity of the outer sealing tube through the first cooling plate, and a second through hole is opened on the top of the inner sleeve, and the second through hole corresponds to the first through hole in the upper and lower positions.
[0007] As a preferred embodiment of the present invention, a heat insulating sleeve is further fixedly provided on the outer wall of the high thermal conductivity copper plate.
[0008] As a preferred embodiment of the present invention, a sealing cover is detachably mounted on one end wall of the outer sealing cylinder by screws, and the sealing cover and the high thermal conductivity copper plate seal the outer sealing cylinder.
[0009] Compared with the prior art, the present invention has the following beneficial effects:
[0010] The inner sleeve temperature must be maintained at around 7°C. This requires the first cooling plate to transfer heat to the high-conductivity copper plate, which is then transferred to the final heat sink via the second cooling plate. The high-conductivity copper plate acts as a central heat conductor and heat storage device, while the outer insulation sleeve provides insulation from high-temperature environments. This ensures the inner sleeve maintains a stable temperature of around 7°C, ensuring stable operation of the PMT detector.
[0011] This utility model can be used in the optical chamber of SO2 and NO2 analyzers. Through a filter device sealed within the entire chamber, decay radiation is directed onto the photosensitive element of a photomultiplier tube. The photomultiplier tube converts this light energy into an electronic signal proportional to the light energy in the sample airflow being analyzed. Constant low-temperature control ensures a consistently low temperature within the chamber, ensuring the proper operation of the photomultiplier tube and enabling use in harsh (high-temperature) environments.
[0012] The specific implementation of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In the attached figure:
[0014] Figure 1 It is a schematic diagram of the utility model.
[0015] In the figure: 10, outer envelope; 11, PMT detector; 12, cover; 13, high-temperature reaction chamber; 14, inner sleeve; 15, first cooling fin; 16, second cooling fin; 17, heat sink; 18, insulation sleeve; 19, high thermal conductivity copper plate. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.
[0017] A PMT detection device, such as Figure 1 As shown, it includes a high-temperature reaction chamber 13, an outer envelope 10 and a PMT detector arranged in the outer envelope 10, wherein the high-temperature reaction chamber 13 is fixed on the top wall of the outer envelope 10, and the outer envelope 10 is provided with a first through hole that connects the outer envelope 10 with the high-temperature reaction chamber 13; an inner sleeve 14 for fixing the PMT detector 11 is also provided in the outer envelope 10, and a first cooling fin 15 is fixed on the end of the inner sleeve 14, a high thermal conductivity copper plate 19 is fixed on one side wall of the first cooling fin 15, a second cooling fin 16 is fixed on the other side wall of the high thermal conductivity copper plate 19, and a heat sink 17 is fixed on the outer wall of the second cooling fin 16.
[0018] like Figure 1 As shown, the high thermal conductivity copper plate 19 is fixed to the wall of one end of the outer envelope 10. The inner sleeve 14 is fixed within the cavity of the outer envelope 10 via a first cooling fin 15. A second through-hole is defined at the top of the inner sleeve 14, corresponding in position to the first through-hole. A thermal insulation sleeve 18 is also fixed to the outer wall of the high thermal conductivity copper plate 19. A cover 12 is removably mounted on one end of the outer envelope 10 via screws. The cover 12 and the high thermal conductivity copper plate 19 seal the outer envelope 10.
[0019] The high-temperature reaction chamber 13 is a gas sampling chamber. It must be kept heated at a high temperature to reduce the liquefaction and adhesion of the sample gas. Because the high-temperature reaction chamber 13 is fixed to the outer envelope 10, most of the heat is conducted to the outer envelope 10. The outer envelope 10 houses an inner sleeve 14, which houses a PMT detector 11. The inner sleeve 14, a high-thermal-conductivity copper plate 19, and a heat sink 17 are tightly secured together by a first cooling fin 15 and a second cooling fin 16. The high-thermal-conductivity copper plate 19 is encapsulated by an insulating sleeve 18. A cover 12 seals the chamber to ensure a sealed interior.
[0020] During operation, the temperature of the inner sleeve 14 must be maintained at approximately 7°C. This requires the first cooling fin 15 to conduct heat to the high-thermal-conductivity copper plate 19, which is then transferred to the final heat sink 17 via the second cooling fin 16. The high-thermal-conductivity copper plate 19 serves as a central heat conductor and heat storage device, while the outer insulation sleeve 18 provides insulation in high-temperature environments. This ensures that the inner sleeve 14 can easily maintain a temperature of approximately 7°C, enabling the PMT detector 11 to operate stably.
[0021] This utility model can be used in the optical chamber of SO2 and NO2 analyzers. Through a filter device sealed within the entire chamber, decay radiation is directed onto the photosensitive element of a photomultiplier tube. The photomultiplier tube converts this light energy into an electronic signal proportional to the light energy in the sample airflow being analyzed. Constant low-temperature control ensures a consistently low temperature within the chamber, ensuring the proper operation of the photomultiplier tube and enabling use in harsh (high-temperature) environments.
[0022] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.
Claims
1. A PMT detection device, comprising a high-temperature reaction chamber (13), an outer envelope (10), and a PMT detector disposed in the outer envelope (10), characterized in that: The high-temperature reaction chamber (13) is fixed on the top wall of the outer envelope (10), and a first through hole is opened on the outer envelope (10) to connect the outer envelope (10) with the high-temperature reaction chamber (13); an inner sleeve (14) is also provided in the outer envelope (10) for fixing the PMT detector (11), and a first cooling fin (15) is fixed at the end of the inner sleeve (14), a high-thermal-conductivity copper plate (19) is fixed on one side wall of the first cooling fin (15), a second cooling fin (16) is fixed on the other side wall of the high-thermal-conductivity copper plate (19), and a heat sink (17) is fixed on the outer wall of the second cooling fin (16).
2. The PMT detection device according to claim 1, wherein The high thermal conductivity copper plate (19) is fixed together with the wall surface of one end of the outer sealing tube (10), and the inner sleeve (14) is fixed in the cavity of the outer sealing tube (10) through the first cooling plate (15). A second through hole is opened on the top of the inner sleeve (14), and the second through hole corresponds to the first through hole in the upper and lower positions.
3. The PMT detection device according to claim 2, characterized in that A heat insulating sleeve (18) is also fixedly provided on the outer wall of the high heat conductive copper plate (19).
4. The PMT detection device according to claim 3, characterized in that A sealing cover (12) is detachably mounted on one end wall of the outer sealing cylinder (10) by means of screws, and the sealing cover (12) and the high thermal conductivity copper plate (19) seal the outer sealing cylinder (10).