Detector heat dissipation device and detector assembly thereof

Abstract

The utility model relates to the technical field of medical imaging equipment, in particular to a detector heat dissipation device and a detector assembly thereof. The detector heat dissipation device comprises a shell and a heat exchange plate, the shell is provided with a cavity, the heat exchange plate is installed in the cavity, a plurality of heat dissipation pieces are arranged on the heat exchange plate, gaps are formed between the adjacent heat dissipation pieces, an inlet and an outlet are formed in the two sides of the shell in the width direction, the cavity is divided into a plurality of sub-spaces, and the sub-spaces are communicated with the inlet and the outlet. And the inlet and the outlet are respectively communicated with the plurality of subspaces. The detector has the advantages that the inlet and the outlet are formed in the width direction of the shell, heat of the heat exchange plate installed in the shell is taken away through flowing of the heat dissipation medium between the inlet and the outlet, the flowing path of the heat dissipation medium is shortened, the temperature gradient on the heat exchange plate is reduced, and the heat dissipation efficiency and the working capacity of the detector are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical imaging equipment, in particular to a detector heat dissipation device and a detector component thereof. Background Art

[0002] Positron emission tomography (PET) systems are playing an increasingly important role in the field of medical imaging. Detectors, as the core components of PET systems, include crystals, photoelectric converters, functional chips and other components. The operation of the above components is closely related to the temperature of the detector. Low temperature environment can increase the light yield of the crystal, reduce the dark current of the photoelectric converter, improve the working efficiency of the photoelectric converter, and reduce the working noise of the functional chip.

[0003] Therefore, the cooling of the detector is extremely important. The existing detector heat dissipation devices have low cooling efficiency and often result in a cooling gradient, which leads to poor cooling effect of components in some detectors. Utility Model Content

[0004] Based on this, the utility model provides a detector heat dissipation device to solve the above technical problems.

[0005] A detector heat dissipation device, the detector heat dissipation device comprising: a shell, which is configured with a cavity; a heat exchange plate, which is installed in the cavity, and a plurality of heat dissipation elements are arranged on the heat exchange plate, and there are gaps between adjacent heat dissipation elements; wherein an inlet and an outlet are opened on both sides of the shell in the width direction, the cavity is separated into a plurality of sub-spaces, and the inlet and the outlet are respectively connected to the plurality of sub-spaces.

[0006] In this way, the cavity of the shell structure provides installation space for the heat exchange plate, and the shell is provided with an inlet and an outlet, so that the heat dissipation medium can enter the cavity from the inlet, exchange heat with the heat exchange plate, and then flow out of the cavity from the outlet, and take away the heat on the heat exchange plate, thereby achieving cooling of the heat exchange plate. A plurality of heat sinks are arranged on the heat exchange plate, and the heat sinks can share the heat on the heat exchange plate and increase the contact area between the heat exchange plate and the heat dissipation medium, thereby improving the heat transfer efficiency per unit time and improving the heat exchange effect. The inlet and outlet are opened in the width direction of the shell, that is, the flow path of the heat dissipation medium is very short, which not only effectively reduces the resistance of the heat sink to the flow of the heat dissipation medium, but also reduces the temperature gradient on the heat exchange plate.

[0007] In one embodiment, a plurality of heat sink arrays are staggered to form a heat sink unit, a plurality of groups of heat sink units are arranged on the heat exchange plate, and a wind shield is arranged between at least two adjacent groups of heat sink units.

[0008] In one embodiment, a plurality of groups of heat dissipation units are arranged at intervals along the length direction of the heat exchange plate, a plurality of through grooves are provided on the heat exchange plate, and the heat dissipation units are provided on both sides of each through groove along the length direction of the heat exchange plate.

[0009] In one embodiment, the heat sink is configured as a cylindrical structure, a prismatic structure or a plate-shaped structure.

[0010] In one embodiment, the shell includes multiple side plates and a top plate, the top plate cover is arranged on the top of the multiple side plates, the heat exchange plate is connected to the side plates, and the heat sink extends toward the top plate, and the heat sink is spaced apart from the top plate at one end close to the top plate.

[0011] In one embodiment, the shell further includes a cover, and the cover is disposed on a side of the heat exchange plate away from the top plate, and the inlet and the outlet are both opened on the top plate.

[0012] In one embodiment, one of the top plate and the side plate is provided with a mounting protrusion, and the other is provided with a mounting groove, and the mounting protrusion is embedded in the mounting groove.

[0013] In one embodiment, the heat exchange plate includes a circuit board and a heat conducting plate, the circuit board is connected to the heat conducting plate, and the heat sink is connected to a side of the heat conducting plate facing away from the circuit board.

[0014] The utility model also provides a detector assembly suitable for a PET system, comprising: a plurality of groups of detectors, arranged side by side along a set direction, each group of detectors comprising a crystal and an electronic device connected to the crystal, the detector being used to receive gamma rays to generate a detection signal; a cavity, extending along the arrangement direction of the plurality of groups of detectors and being partitioned into a plurality of subspaces, and a plurality of heat sinks being arranged in each subspace; a heat exchange plate, extending along the arrangement direction of the plurality of groups of detectors, the heat exchange plate being thermally connected to the cavity, the heat exchange plate having two opposite sides, one side facing away from the cavity and being used to fix the plurality of groups of detectors, and the other side facing the cavity and fixing the plurality of heat sinks.

[0015] In one embodiment, a through groove is formed on the heat exchange plate, and the heat sink is disposed on both sides of the through groove.

[0016] Compared with the prior art, the utility model opens an inlet and an outlet in the width direction of the shell, and removes the heat of the heat exchange plate installed in the shell by the flow of the heat dissipation medium between the inlet and the outlet, shortens the flow path of the heat dissipation medium, reduces the temperature gradient on the heat exchange plate, improves the heat dissipation efficiency and the working capacity of the detector. It also optimizes the structure and layout of the heat dissipation element on the heat exchange plate, and further improves the heat exchange speed between the heat dissipation element and the heat dissipation medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of one embodiment of the detector heat dissipation device provided by the utility model;

[0018] Figure 2 A schematic diagram of the structure of one embodiment of the detector heat dissipation device provided by the utility model;

[0019] Figure 3 A top cross-sectional view of one embodiment of the detector heat dissipation device provided by the utility model;

[0020] Figure 4 A partial structural schematic diagram of one embodiment of the detector heat dissipation device provided by the utility model;

[0021] Figure 5 A three-dimensional diagram of a windshield of one embodiment of the detector heat dissipation device provided by the utility model;

[0022] Figure 6 A top view of one embodiment of the detector heat dissipation device provided by the utility model;

[0023] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0024] The symbols in the figure mean the following:

[0025] 100. Detector heat dissipation device; 10. Shell; 11. Cavity; 12. Side panel; 121. Assembly groove; 13. Top panel; 131. Assembly protrusion; 14. Cover; 15. Inlet; 16. Outlet; 20. Heat exchange plate; 21. Through slot; 22. Wind shield; 23. Circuit board; 24. Heat conduction plate; 30. Heat dissipation unit; 31. Heat sink. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0031] The utility model provides a detector heat dissipation device 100, in which a heat exchange plate 20 that needs to dissipate heat is installed in a shell 10, and a crystal, a photoelectric converter and a functional chip are combined in the heat exchange plate 20. The detector heat dissipation device 100 can dissipate heat from the heat exchange plate 20 to cool the above-mentioned components.

[0032] See also Figure 1-Figure 3 The detector heat dissipation device 100 includes a shell 10 and a heat exchange plate 20. The shell 10 is configured with a cavity 11. The heat exchange plate 20 is installed in the cavity 11. A plurality of heat sinks 31 are arranged on the heat exchange plate 20. There is a gap between adjacent heat sinks 31. An inlet 15 and an outlet 16 are provided on both sides of the width direction of the shell 10. The cavity 11 is divided into a plurality of sub-spaces. The inlet 15 and the outlet 16 are connected to the plurality of sub-spaces respectively. In this way, the cavity 11 configured by the shell 10 provides an installation space for the heat exchange plate 20. The shell 10 is configured with an inlet 15 and an outlet 16. Therefore, the heat dissipation medium can enter the cavity 11 from the inlet 15, perform heat exchange with the heat exchange plate 20, and then flow out of the cavity 11 from the outlet 16, and take away the heat on the heat exchange plate 20, thereby realizing cooling of the heat exchange plate 20. A plurality of heat sinks 31 are provided on the heat exchange plate 20, and the heat sinks 31 can distribute the heat on the heat exchange plate 20 and increase the contact area between the heat exchange plate 20 and the heat dissipation medium, thereby improving the heat transfer efficiency per unit time and the heat exchange effect. The inlet 15 and the outlet 16 are opened in the width direction of the shell 10, that is, the flow path of the heat dissipation medium is very short, which not only effectively reduces the resistance caused by the heat sink 31 to the flow of the heat dissipation medium, but also reduces the temperature gradient on the heat exchange plate 20. In addition, the cavity 11 is divided into a plurality of sub-spaces, which can more effectively perform heat exchange on the heat exchange plate 20 and the heat sink 31 in each sub-space, thereby improving the heat dissipation efficiency.

[0033] The heat exchange plate 20 is installed in the cavity 11, which means that the heat exchange plate 20 is connected and combined with the housing 10 to install, fix and cool the crystal and the electronic board. The heat exchange plate 20, the crystal and the electronic board are assembled into a unit and located in the cavity 11, so that the detector heat dissipation device 100 can be expanded axially. The crystal is installed in the cover 14, which is not shown in the figure.

[0034] It should be explained that, since the temperature of the heat dissipation medium is relatively low when it just enters the cavity 11 from the inlet 15, the heat exchange efficiency of the heat dissipation medium, the heat dissipation element 31 and the heat exchange plate 20 is relatively high at this time, and the temperature of the heat exchange plate 20 is low. As the heat dissipation medium and the heat exchange plate 20 exchange heat, the temperature of the heat dissipation medium gradually increases. Therefore, the temperature difference between the side of the heat exchange plate 20 close to the outlet 16 of the shell 10 and the heat dissipation medium becomes smaller, and the heat exchange efficiency decreases. Therefore, the heat exchange plate 20 will have a temperature gradient phenomenon. In this embodiment, since the inlet 15 and the outlet 16 are opened in the width direction of the shell 10, the flow path is short, and the temperature rise of the heat dissipation medium is not obvious, so the temperature gradient phenomenon on the heat exchange plate 20 can be reduced.

[0035] In this embodiment, the heat dissipation medium may be air or cooling liquid, that is, the detector heat dissipation device 100 may be configured to be air-cooled or liquid-cooled.

[0036] For further information, see Figure 4 , multiple heat sinks 31 are arranged in an array in a staggered manner to form a heat dissipation unit 30, and multiple groups of heat dissipation units 30 are arranged on the heat exchange plate 20. In this way, multiple heat sinks 31 are arranged in an array in a staggered manner, so there are gaps between adjacent heat sinks 31, and the gaps can allow the heat dissipation medium to flow through, thereby improving the heat exchange efficiency between the heat sinks 31. And because the heat sinks 31 are staggered, the heat dissipation medium can form turbulence between the heat sinks 31, thereby improving the heat exchange efficiency. There are multiple groups of heat dissipation units 30, and each group is arranged at a corresponding heating position of the heat exchange plate 20, so that cooling can be achieved for a specific position on the heat exchange plate 20.

[0037] Multiple groups of heat dissipation units 30 are arranged at intervals along the length direction of the heat exchange plate 20. The heat exchange plate 20 is provided with multiple through slots 21. Along the length direction of the heat exchange plate 20, heat dissipation units 30 are arranged on both sides of each through slot 21. In this way, the through slots 21 are used to connect the heat exchange plate 20 with other electronic components of the detector.

[0038] In this embodiment, the through groove 21 is configured to be rectangular and extends along the width direction of the heat exchange plate 20. The rectangular through groove 21 is convenient for processing and is also easier to form an assembly connection with other components.

[0039] Preferably, see Figure 5 , a windshield 22 is provided between at least two adjacent heat dissipation units 30. The windshield 22 can fill the gaps between the heat dissipation units 30, so that the heat dissipation medium flows through the gaps between the heat dissipation elements 31. Since the heat dissipation elements 31 are arranged in an array, there are more gaps between the heat dissipation elements 31, so the contact and heat exchange between the heat dissipation medium and the heat dissipation elements 31 are more sufficient.

[0040] It should be explained that, in this embodiment, the wind shield 22 divides the cavity 11 into a plurality of sub-spaces. In other embodiments, the sub-spaces may also be formed by other structures capable of dividing the cavity 11, and are not limited to the wind shield 22 described above.

[0041] In this embodiment, through slots 21 or wind shields 22 are provided between adjacent groups of heat dissipation units 30 .

[0042] Specifically, the wind shield 22 is configured as a rectangular block, and its shape is adapted to the gap between adjacent heat dissipation units 30, so that the wind shield 22 can effectively prevent the heat dissipation medium from passing through the gap between adjacent heat dissipation units 30, and force the heat dissipation medium to pass through the gap between the heat dissipation elements 31 to improve the heat exchange efficiency with the heat dissipation elements 31.

[0043] In other embodiments, the wind shield 22 may also be configured as an inclined plate structure or a curved surface structure, etc., to guide the heat dissipation medium toward the heat dissipation unit 30 (that is, the gap between adjacent heat dissipation elements 31 ).

[0044] In this embodiment, the heat sink 31 is configured as a cylindrical structure, a prism structure or a plate structure. The heat sink 31 only needs to be able to achieve heat exchange with the heat dissipation medium, and is not limited to the shape. For example, the heat sink 31 can be configured as a quadrangular prism, a hexagonal prism or an octagonal prism according to work requirements.

[0045] The shell 10 includes a plurality of side plates 12 and a top plate 13. The top plate 13 is covered on the top of the plurality of side plates 12. The heat exchange plate 20 is connected to the side plates 12, and the heat sink 31 extends toward the top plate 13. One end of the heat sink 31 close to the top plate 13 is spaced apart from the top plate 13. In this way, the shell 10 is formed by assembling the side plates 12 and the top plate 13. The top plate 13 and the side plates 12 are processed separately and then assembled together, which reduces the process difficulty. There is no need to directly process the shell 10 as a whole, and it is also convenient for the installation of other components in the cavity 11. One end of the heat sink 31 close to the top plate 13 is spaced apart from the top plate 13, which facilitates the installation of the heat sink 31 and avoids interference between the heat sink 31 and the top plate 13.

[0046] The housing 10 further includes a cover 14, which covers the side of the heat exchange plate 20 away from the top plate 13 to protect the side of the heat exchange plate 20 facing away from the top plate 13 and forms an installation space with the heat exchange plate 20, which can carry the electronic components of the detector.

[0047] The inlet 15 and the outlet 16 are both opened on the top plate 13 , so the heat dissipation medium flows in from the top plate 13 and finally flows out from the top plate 13 , which can form a U-shaped flow path in the cavity 11 and improve the heat dissipation efficiency.

[0048] In other embodiments, the inlet 15 and the outlet 16 may also be opened on the side plate 12 , or one may be opened on the top plate 13 and the other may be opened on the side plate 12 .

[0049] The heat exchange plate 20 includes a circuit board 23 and a heat conducting plate 24, the circuit board 23 is connected to the heat conducting plate 24, and the heat sink 31 is connected to the side of the heat conducting plate 24 facing away from the circuit board 23. The heat conducting plate 24 is made of a material with a high thermal conductivity, such as aluminum carbide, silicon nitride or copper, so that the heat on the circuit board 23 can be quickly transferred to the heat sink 31, effectively reducing the temperature of the heat sink 31.

[0050] The circuit board 23 and the heat conducting plate 24 are fixedly connected by screws, and the heat sink 31 is also fixedly connected to the heat conducting plate 24 . In other embodiments, the heat sink 31 may be bonded or welded to the heat conducting plate 24 .

[0051] See also Figure 6-Figure 7 One of the top plate 13 and the side plate 12 is provided with an assembly protrusion 131, and the other is provided with an assembly groove 121. The assembly protrusion 131 is embedded in the assembly groove 121 to improve the connection strength and sealing between the top plate 13 and the side plate 12 to prevent leakage of the heat dissipation medium in the cavity 11.

[0052] Preferably, both sides of the top plate 13 in the width direction are provided with assembly protrusions 131, and both sides of the side plates 12 in the width direction of the top plate 13 are provided with assembly grooves 121, so as to achieve a stable connection between the side plates 12 and the top plate 13. Alternatively, both sides of the top plate 13 in the width direction are provided with assembly grooves 121, and the side plates 12 are provided with assembly protrusions 131 protruding toward the side of the top plate 13, and the sealing connection between the side plates 12 and the top plate 13 is achieved by the clamping of the assembly protrusions 131 and the assembly grooves 121.

[0053] Of course, in other embodiments, the top plate 13 and the side plate 12 may also be connected together by bonding or welding, etc., and are not limited to the plug-in fit between the above-mentioned assembly protrusions 131 and the assembly grooves 121.

[0054] The utility model also provides a scanning device, comprising the detector heat sink 100, a detector and an active heat sink as described above. The active heat sink is located outside the detector heat sink 100 and can send a cooling medium toward the detector heat sink, and the cooling medium can contact the detector heat sink 100. The active heat sink can be a fan, and the fan can blow air toward the detector heat sink 100 to accelerate the air flow in the cavity 11. The detector is connected to the detector heat sink 100. In other embodiments, the active heat sink can also be a liquid cooling heat sink, and the surface temperature of the detector heat sink 100 is taken away by the coolant.

[0055] The utility model also provides a detector assembly suitable for a PET system, comprising a plurality of groups of detectors arranged side by side along a set direction, each group of detectors comprising a crystal and an electronic device connected to the crystal, the detectors being installed in a cover 14 (not shown in the figure), the detectors being used to receive gamma rays to generate a detection signal, the cavity 11 extending along the arrangement direction of the plurality of groups of detectors and being spaced into a plurality of subspaces, and a plurality of heat sinks 31 being arranged in each subspace, the heat exchange plate 20 extending along the arrangement direction of the plurality of groups of detectors, the heat exchange plate being thermally connected to the cavity 11, the heat exchange plate 20 having two opposite sides, one side facing away from the cavity 11 and being used to fix the plurality of groups of detectors, and the other side facing the cavity 11 and fixing the plurality of heat sinks 31.

[0056] The heat exchange plate 20 is provided with a through slot 21, and heat sinks 31 are provided on both sides of the through slot 21. The through slot can facilitate the installation of the heat exchange plate 20.

[0057] Compared with the prior art, the utility model opens an inlet 15 and an outlet 16 in the width direction of the housing 10, and takes away the heat of the heat exchange plate 20 installed in the housing 10 by the flow of the heat dissipation medium between the inlet 15 and the outlet 16, shortens the flow path of the heat dissipation medium, reduces the temperature gradient on the heat exchange plate 20, improves the heat dissipation efficiency and the working capacity of the detector. The structure and layout of the heat dissipation element 31 on the heat exchange plate 20 are also optimized, further improving the heat exchange speed between the heat dissipation element 31 and the heat dissipation medium.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A detector heat dissipation device, suitable for a PET system, characterized in that: The detector heat dissipation device comprises: A housing (10) is provided with a cavity (11); A heat exchange plate (20) is installed in the cavity (11), and a plurality of heat dissipating elements (31) are arranged on the heat exchange plate (20), with gaps between adjacent heat dissipating elements (31); An inlet (15) and an outlet (16) are provided on both sides of the shell (10) in the width direction, the cavity (11) is divided into a plurality of sub-spaces, and the inlet (15) and the outlet (16) are respectively connected to the plurality of sub-spaces.

2. The detector heat dissipation device according to claim 1, characterized in that: A plurality of the heat dissipating elements (31) are arranged in an array in a staggered manner to form a heat dissipating unit (30); a plurality of groups of the heat dissipating units (30) are arranged on the heat exchange plate (20); and a wind shield (22) is arranged between at least two adjacent groups of the heat dissipating units (30).

3. The detector heat dissipation device according to claim 2, characterized in that: A plurality of groups of heat dissipation units (30) are arranged at intervals along the length direction of the heat exchange plate (20); a plurality of through grooves (21) are provided on the heat exchange plate (20); and a heat dissipation unit (30) is provided on both sides of each through groove (21) along the length direction of the heat exchange plate (20).

4. The detector heat dissipation device according to claim 1, characterized in that: The heat sink (31) is configured as a cylindrical structure, a prism structure or a plate structure.

5. The detector heat dissipation device according to claim 1, characterized in that: The shell (10) comprises a plurality of side plates (12) and a top plate (13); the top plate (13) is covered on the top of the plurality of side plates (12); the heat exchange plate (20) is connected to the side plates (12); and the heat sink (31) extends toward the top plate (13); and one end of the heat sink (31) close to the top plate (13) is spaced apart from the top plate (13).

6. The detector heat dissipation device according to claim 5, characterized in that: The shell (10) further comprises a cover shell (14), wherein the cover shell (14) is arranged to cover the side of the heat exchange plate (20) away from the top plate (13), and the inlet (15) and the outlet (16) are both provided on the top plate (13).

7. The detector heat dissipation device according to claim 5, characterized in that: One of the top plate (13) and the side plate (12) is provided with a mounting protrusion (131), and the other is provided with a mounting groove (121), wherein the mounting protrusion (131) is embedded in the mounting groove (121).

8. The detector heat dissipation device according to claim 1, characterized in that: The heat exchange plate (20) comprises a circuit board (23) and a heat conducting plate (24), the circuit board (23) being connected to the heat conducting plate (24), and the heat sink (31) being connected to a side of the heat conducting plate (24) facing away from the circuit board (23).

9. A detector assembly, suitable for a PET system, characterized in that ,include: A plurality of groups of detectors are arranged side by side along a set direction, each group of detectors comprises a crystal and an electronic device connected to the crystal, and the detectors are used to receive gamma rays to generate detection signals; A cavity (11) extending along the arrangement direction of the plurality of detector groups and divided into a plurality of subspaces, wherein each subspace is provided with a plurality of heat sinks (31); A heat exchange plate (20) extends along the arrangement direction of the multiple groups of detectors. The heat exchange plate (20) is thermally connected to the cavity (11). The heat exchange plate (20) has two opposite sides, one side faces away from the cavity (11) and is used to fix the multiple groups of detectors, and the other side faces the cavity (11) and fixes the multiple heat sinks (31).

10. The detector assembly according to claim 9, characterized in that The heat exchange plate (20) is provided with a through slot (21), and the heat sink (31) is arranged on both sides of the through slot (21).

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