Detector and scanning apparatus

Abstract

The present disclosure relates to the technical field of medical scanning devices, and discloses a detector and a scanning device. The detector comprises: a shell defining a first cavity and a second cavity in communication, and provided with an air inlet communicating with the first cavity and an air outlet communicating with the second cavity; a fan arranged in the first cavity and opposite to the air inlet; and a detection module arranged in the second cavity and opposite to the air outlet. The fan is of a shell-free structure, and the first cavity can guide the airflow generated by the fan to the second cavity. The heat dissipation scheme of the detector has the advantages of compact structure and low noise, and meanwhile has sufficient air volume output capacity, and can meet the performance requirements of the detector on high-power heat dissipation.

Description

Technical Field

[0001] This disclosure relates to the field of medical scanning equipment technology, such as a detector and scanning device. Background Technology

[0002] As one of the core components of a scanning device, the detector's heat dissipation performance directly affects the stability of its operation and the quality of the image. Poor heat dissipation will cause the detector module to operate in a high-temperature environment for extended periods, which will not only shorten its lifespan but may also damage it, affecting the normal operation of the equipment.

[0003] As scanning equipment continues to develop towards high-end features, the number of detection modules mounted on the detector continues to increase, and the overall heat generation rises significantly. This places higher demands on the temperature control capability and heat dissipation uniformity of the heat dissipation system. Traditional heat dissipation solutions are no longer able to meet the heat dissipation needs of new high-scanning equipment.

[0004] To address the aforementioned issues, the following three main methods are commonly used in related technologies to improve heat dissipation efficiency: first, multiple fans are installed on the detector housing; second, multiple fans are configured on the detector and multiple dedicated air duct structures are designed to guide the airflow direction; and third, a single fan is configured on the detector and multiple dedicated air duct structures are designed to guide the airflow direction.

[0005] In the first approach, most detectors use small axial fans for heat dissipation. To overcome the air resistance caused by the dense arrangement of the detector modules, the fans typically need to operate at high speeds (5000 RPM or even tens of thousands of RPM), and multiple fans work simultaneously, resulting in a significant increase in overall noise. This high-noise environment not only affects the health of operators but also contradicts the positioning of high-end products, thereby impacting brand image and market competitiveness.

[0006] In the second scheme, the long and complex air duct between the fan and the detection module increases wind resistance, causing airflow reduction and affecting heat dissipation. Furthermore, the tortuous air path and non-compact structure limit its application in high-power detectors with limited space.

[0007] In the third option, setting up a single fan simplifies the fan layout, but due to the limited fan size, it cannot provide sufficient airflow. Especially when facing high-power detection modules, the heat dissipation capacity is obviously insufficient, making it difficult to meet the heat dissipation requirements of high-end scanning equipment.

[0008] In summary, the heat dissipation solutions for detectors provided by the relevant technologies have certain shortcomings in terms of noise control, structural compactness, airflow supply, and temperature uniformity. There is an urgent need to propose a new heat dissipation structure design to better adapt to the development trend of high-end scanning equipment.

[0009] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0010] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0011] This disclosure provides a detector and a scanning device. The detector's heat dissipation scheme has the advantages of compact structure and low noise, while also having sufficient airflow output capability.

[0012] According to a first aspect of this disclosure, a detector is provided, comprising:

[0013] The outer casing defines a first chamber and a second chamber that are connected, and is provided with an air inlet connected to the first chamber and an air outlet connected to the second chamber.

[0014] The fan is installed in the first chamber and is opposite to the air inlet;

[0015] The detection module is located in the second chamber and is opposite to the air outlet;

[0016] The fan has a shell-less structure, and the first chamber can guide the airflow generated by the fan to the second chamber.

[0017] In some embodiments, the first chamber and the second chamber form an L-shaped air duct.

[0018] In some embodiments, the housing includes a first housing and a second housing that both extend along the length direction of the housing, and the first housing and the second housing are connected to each other;

[0019] The first housing defines a first chamber and an air inlet, and the second housing defines a second chamber and an air outlet. The air inlet and air outlet are located at the two ends of the extension direction of the corresponding part of the second chamber in the L-shaped air guide channel.

[0020] In some embodiments, the length direction of both the first housing and the second housing extends along a predetermined arc, and the dimension of the first housing in the radial direction along the predetermined arc is greater than the dimension of the second housing in the radial direction along the predetermined arc.

[0021] In some embodiments, the air inlet and the second chamber are staggered in the radial direction along a predetermined arc.

[0022] In some embodiments, there are multiple air inlets and multiple fans, which are spaced apart along the length of the housing, with each fan corresponding to one air inlet.

[0023] There are multiple detection modules, which are arranged in the second chamber along the length of the outer shell.

[0024] In some embodiments, the housing further includes a plurality of partitions spaced apart along the length of the housing, the plurality of partitions dividing the first chamber into a plurality of independent sub-chambers, each sub-chamber being provided with at least one fan.

[0025] In some embodiments, the area of ​​the chamber opening connecting each sub-chamber to the second chamber is inversely proportional to the heat dissipation of the detection module corresponding to that sub-chamber.

[0026] In some embodiments, the number of fans in each sub-cavity is the same, the number of detection modules corresponding to the end sub-cavities is greater than the number of detection modules corresponding to the middle sub-cavities, or the number of detection modules corresponding to the sub-cavities increases or decreases sequentially along the length of the outer casing.

[0027] According to a second aspect of this disclosure, a scanning device is provided, including a device body and a detector provided according to a first aspect of this disclosure;

[0028] The main body of the equipment is equipped with a cold air chamber and a hot air chamber. The air inlet of the detector is connected to the cold air chamber, and the air outlet of the detector is connected to the hot air chamber.

[0029] According to a second aspect of the present disclosure, a scanning device is provided, characterized in that it includes a device body and a detector provided according to a first aspect of the present disclosure;

[0030] The main body of the equipment is equipped with a cold air chamber and a hot air chamber. The air inlet of the detector is connected to the cold air chamber, and the air outlet of the detector is connected to the hot air chamber.

[0031] The detector provided in this disclosure can achieve the following technical effects:

[0032] The detector provided in this embodiment has a first chamber and a second chamber that are interconnected inside the outer casing. The first chamber houses a fan, and the second chamber houses a detection module. Since the outer wall of the first chamber can form the volute structure of the fan, the fan can be designed without a casing. This structure significantly reduces the space occupied by the fan, facilitating a compact design of the overall detector structure. Furthermore, larger fans can be arranged within the same space. Even with a smaller number of fans, the airflow provided by larger fans can meet the high-power heat dissipation requirements; alternatively, the fans can operate at lower speeds while still providing sufficient airflow for high-power heat dissipation. Both reducing the number of fans and lowering their speed contribute to effectively reducing system operating noise. Therefore, this detector's heat dissipation solution has the advantages of compact structure and low noise, while possessing sufficient airflow output capacity to meet the high-power heat dissipation performance requirements of high-end detectors.

[0033] The above general description and the description below are exemplary and illustrative only and are not intended to limit this disclosure. Attached Figure Description

[0034] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0035] Figure 1 This is a schematic diagram of a detector provided in an embodiment of the present disclosure from an axial side view.

[0036] Figure 2 This is a schematic diagram of a detector provided in an embodiment of this disclosure from another axial side view.

[0037] Figure 3 This is a top view of a detector provided in an embodiment of this disclosure;

[0038] Figure 4 This is a detector provided in an embodiment of the present disclosure. Figure 3 Sectional view at point A in the middle;

[0039] Figure 5 This is a schematic diagram of a fan provided in an embodiment of this disclosure;

[0040] Figure 6 This is a schematic diagram of the airflow direction of a detector at point A according to an embodiment of this disclosure;

[0041] Figure 7 This is a schematic diagram of a detector after one sidewall has been removed, according to an embodiment of this disclosure;

[0042] Figure 8 This is a schematic diagram of another detector provided in this disclosure after removing one sidewall;

[0043] Figure 9 This is a schematic diagram of another detector provided in this disclosure after removing one sidewall;

[0044] Figure 10 This is a schematic diagram of another detector provided in this disclosure after removing one sidewall;

[0045] Figure 11 This is a schematic diagram of a scanning device provided in an embodiment of this disclosure.

[0046] Explanation of icon numbers:

[0047] 100 detectors;

[0048] 1. Outer shell; 11. First shell; 12. Second shell; 13. Partition plate;

[0049] 101 First chamber, 1011 Sub-chamber, 1012 Chamber opening;

[0050] 102 Second chamber, 103 Air inlet, 104 Air outlet;

[0051] 2 fans, 3 detection modules;

[0052] 200 Equipment body, 201 Cold air chamber, 202 Hot air chamber. Detailed Implementation

[0053] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0054] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0055] Unless otherwise stated, the term "multiple" means two or more.

[0056] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0057] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0058] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0059] This disclosure provides a detector 100, combined with... Figures 1 to 5 As shown, the detector 100 includes a housing 1, a fan 2, and a detection module 3. The fan 2 is a housing-less structure, which refers to a fan design without a traditional metal or plastic housing, where its core components (mainly the motor and impeller) are directly exposed to the airflow or are only mounted on a bracket. Optionally, the fan 2 can be a centrifugal fan or an axial fan.

[0060] The detection module 3 is a physical component that converts optical signals into electrical signals and is the core functional component in the detection process. For example, in a computed tomography (CT) scanner, the detector includes a physical component for receiving X-rays passing through the object under test and converting them into electrical signals. The detector can be a photon counting detector or a scintillator detector. In a positron emission tomography (PET) scanner, the detector includes a physical component for receiving gamma rays passing through the object under test and converting them into electrical signals.

[0061] The outer casing 1 defines a first chamber 101 and a second chamber 102 that communicate with each other, and is provided with an air inlet 103 communicating with the first chamber 101 and an air outlet 104 communicating with the second chamber 102. A fan 2 is disposed within the first chamber 101, and the outer wall of the first chamber 101 forms the casing of the fan 2. The fan 2 is opposite to the air inlet 103, and the first chamber 101 can guide the airflow generated by the fan 2 to the second chamber 102. A detection module 3 is disposed within the second chamber 102, and the detection module 3 is opposite to the air outlet 104.

[0062] When the detector 100 is installed on the main body 200 of the scanning equipment, the air inlet 103 of the detector 100 is connected to the cold air chamber 201, and the air outlet 104 of the detector 100 is connected to the hot air chamber 202. Figure 4 and Figure 6 As shown, Figure 6The arrows indicate the direction of airflow. When the fan 2 is working, it can draw in cold air from the cold air chamber through the air inlet 103 to form an airflow, which then enters the first chamber 101. The first chamber 101 guides the airflow generated by the fan 2 to the second chamber 102 to cool the detection module 3. The cold air exchanges heat with the detection module 3 to dissipate heat from the detection module 3. The heated air is then discharged to the hot air chamber through the air outlet 104.

[0063] The detector 100 provided in this embodiment has a first chamber 101 and a second chamber 102 that are interconnected inside the outer casing 1. The first chamber 101 is used to accommodate a fan 2, and the second chamber 102 is used to accommodate a detection module 33. Since the outer wall of the first chamber 101 can form the shell structure of the fan 2, the fan 2 can be designed without a shell. This structure significantly reduces the space occupied by the fan 2, which is beneficial to achieving a compact design of the overall structure of the detector 100. In addition, under the same space conditions, a larger fan 2 can be arranged. When using a larger fan 2, even if a smaller number of fans 2 are used, the air volume provided can meet the high-power heat dissipation requirements; or the fan 2 can operate at a lower speed, and the air volume provided can also meet the high-power heat dissipation requirements. Whether reducing the number of fans 2 or reducing the speed of the fans 2, it helps to effectively reduce the operating noise of the system. It can be seen that the heat dissipation scheme of the detector 100 has the advantages of compact structure and low noise, while having sufficient air volume output capacity, which can meet the performance requirements of high-end detectors 100 for high-power heat dissipation.

[0064] In some embodiments, the fan 2 is a shell-less centrifugal fan, and the first chamber 101 and the second chamber 102 form an L-shaped air guide channel. By setting the L-shaped air guide channel, the cold air can enter the first chamber 101 from the air inlet 103 and then turn 90° at the connection between the first chamber 101 and the second chamber 102, so that the air direction changes from flowing along the height direction parallel to the first housing 11 to flowing along the height direction parallel to the second housing 12. This turning helps to distribute the cold air evenly to each detection module 3, ensuring that each detection module 3 can receive sufficient heat dissipation.

[0065] In some embodiments, the outer casing 1 includes a first housing 11 and a second housing 12, both extending along the length of the outer casing 1, and the first housing 11 and the second housing 12 are connected to each other. The first housing 11 defines a first chamber 101 and an air inlet 103, and the second housing 12 defines a second chamber 102 and an air outlet 104. Designing the outer casing 1 as a structure composed of the first housing 11 and the second housing 12 facilitates the functional division of the internal space of the detector 100, and the connection structure between the first housing 11 and the second housing 12 ensures unobstructed airflow between the first chamber 101 and the second chamber 102.

[0066] The height direction of the first housing 11 is perpendicular to the height direction of the second housing 12, thereby forming an L-shaped air guide channel between the first chamber 101 and the second chamber 102, with the air inlet 103 and air outlet 104 located at opposite ends of the extension direction of the corresponding portion of the second chamber 102 within the L-shaped air guide channel. Figure 4 As shown, direction M represents the height direction of the first housing 11. Direction N represents the height direction of the second housing 12, which is also the extension direction of the corresponding part of the second chamber 102 in the L-shaped air guide channel. Moreover, setting the height direction of the first housing 11 to be perpendicular to the height direction of the second housing 12 helps to realize the three-dimensional layout of the internal functional areas of the detector 100 within a limited space, thereby improving the overall space utilization.

[0067] In some embodiments, both the first housing 11 and the second housing 12 extend along a predetermined arc in their longitudinal direction, and the radial dimension of the first housing 11 along the predetermined arc is larger than the radial dimension of the second housing 12 along the predetermined arc. For example, the first housing 11 is a fan-shaped housing structure, and the second housing 12 is an arc-shaped housing structure that matches the first housing 11. The radial extension direction of the predetermined arc is... Figure 4 The direction M shown is consistent. Taking a computed tomography (CT) scanner as an example, when the detector 100 is installed on the main body 200 of the scanner, the center of the predetermined arc roughly coincides with the focal point of the X-ray tube of the scanner.

[0068] In some embodiments, the air inlet 103 and the second chamber 102 are staggered in the radial direction along a predetermined arc. This staggered design is adapted to the operating characteristics of the centrifugal fan, ensuring that the cold air more fully covers the entire space of the second chamber 102, thereby improving the cooling effect on the detection module 3.

[0069] In some embodiments, there are multiple air inlets 103 and multiple fans 2, all spaced apart along the length of the outer casing 1, with each fan 2 corresponding to one air inlet 103. There are also multiple detection modules 3, arranged along the length of the outer casing 1 within the second chamber 102. Distributing the fans 2 in the first chamber 101 spaced apart along the length of the outer casing 11 allows for zoned airflow and heat dissipation for the detection modules 3 in corresponding positions within the second chamber 102. Each fan 2 is only responsible for heat dissipation within its corresponding area, facilitating precise control of the overall heat dissipation area of ​​the detector 100 and significantly improving the uniformity of heat dissipation temperature among the detection modules 3.

[0070] In some embodiments, each fan 2 corresponds one-to-one with each air inlet 103, and each fan 2 is aligned with its corresponding air inlet 103. The one-to-one air inlet 103 and fan 2 structural design can improve the efficiency of cold air intake, and can also realize zoned air supply in multiple areas inside the detector 100, thereby enhancing the uniformity of heat dissipation temperature among the detector modules 33.

[0071] Figures 7 to 9 A schematic diagram of the detector 100 after removing the sidewall where the air inlet 103 is located. In some embodiments, with... Figure 7 For example, the first chamber 101 is a single, integral chamber where all the fans 2 are located in the same space. In some embodiments, combined with Figure 8 and Figure 9 As shown, the first chamber 101 includes a plurality of independent sub-chambers 1011, which are spaced apart along the length of the outer casing 1. Specifically, the outer casing 1 includes a plurality of partitions 13 spaced apart along its length, dividing the first chamber 101 into a plurality of independent sub-chambers 1011. Each sub-chamber 1011 is provided with an air inlet 103 and a chamber opening 1012 communicating with the second chamber 102. At least one fan 2 is provided in each sub-chamber 1011. Figure 8 For example, the outer casing 1 includes two partitions 13 spaced apart along its length. These two partitions 13 divide the first chamber 101 into three independent sub-chambers 1011. Two of these sub-chambers are each equipped with one fan 2, and the third sub-chamber 1011 is equipped with two fans 2. Figure 9 For example, the outer shell 1 includes three partitions 13 spaced apart along the length of the outer shell 1. The three partitions 13 divide the first chamber into four independent sub-chambers 1011, and each sub-chamber 1011 is equipped with a fan 2.

[0072] By arranging the fans 2 in their respective sub-chambers 1011, independent air supply and heat dissipation can be provided to the detection modules 3 in different areas of the detector 100. This allows for flexible adjustment based on the differences in heat generation in each area, significantly improving the uniformity of heat dissipation temperature across the detection modules 3 of the detector 100. Simultaneously, the partitions between the sub-chambers 1011 effectively prevent airflow interference, improve the air delivery efficiency of the fans 2, and enhance the operational reliability of the system.

[0073] In some embodiments, the area of ​​the chamber opening 1012 connecting each sub-chamber 1011 to the second chamber 102 is inversely proportional to the heat dissipation of the detection module 3 corresponding to that sub-chamber 1011. Specifically, the area of ​​the chamber opening 1012 corresponding to the region of the detection module 3 with higher heat generation is smaller, while the area of ​​the chamber opening 1012 corresponding to the region of the detection module 3 with lower heat generation is larger. By setting the area of ​​the chamber opening 1012 inversely proportional to the heat generation, the region of the detection module 3 with higher heat generation can obtain a higher local wind speed and stronger heat dissipation capacity, while the region of the detection module 3 with lower heat generation can obtain a moderate wind speed and heat dissipation capacity, thereby effectively balancing the temperature distribution of the detection modules 3 in each region and improving the uniformity of the heat dissipation temperature of each detection module 3.

[0074] In this embodiment, the width of the chamber opening 1012 of each sub-chamber 1011 is equal. The area of ​​the chamber opening 1012 of the sub-chamber 1011 is adjusted by differentiating the length of the chamber opening 1012. Here, the width direction of the chamber opening 1012 of the sub-chamber 1011 is parallel to the height direction of the second housing 12, and the length direction of the chamber opening 1012 of the sub-chamber 1011 is the extension direction of the predetermined arc.

[0075] In some embodiments, the number of fans 2 provided in each sub-chamber 1011 is the same, and the number of detection modules 3 corresponding to the end sub-chambers 1011 is greater than the number of detection modules 3 corresponding to the middle sub-chambers 1011. For example... Figure 9 As shown, the detector includes four sub-chambers 1011, with lengths a, b, c, and d respectively. The values ​​b = c ≤ a = d can be set, meaning the number of detector modules 3 corresponding to the end sub-chambers 1011 is the same, the number of detector modules 3 corresponding to the middle sub-chambers 1011 is the same, and the number of detector modules 3 corresponding to the end sub-chambers 1011 is greater than the number of detector modules 3 corresponding to the middle sub-chambers 1011. When the scanning equipment is a computed tomography (CT) scanner, the detector modules 3 are typically arranged along the rotation direction of the scanning equipment and operate as the scanning equipment rotates. In some cases, since the detector modules 3 in the middle region are the main working area for receiving X-rays, they generate more heat and require stronger cooling capabilities. With the same number of fans 2 installed in each sub-chamber 1011, by reducing the number of detector modules corresponding to the middle sub-chambers, the flow velocity of the cooling airflow to the detector modules in the middle region is increased, thereby achieving focused cooling of the high-heat-load area.

[0076] In some embodiments, the number of fans 2 provided in each sub-chamber 1011 is the same, and the number of detection modules 3 corresponding to the sub-chambers 1011 increases or decreases sequentially along the length of the outer casing. For example... Figure 10 As shown, the detector includes four sub-chambers 1011, with lengths a, b, c, and d respectively. The lengths can be set from a < b < c < d, meaning the number of detector modules 3 corresponding to the four sub-chambers 1011 increases sequentially from left to right. The arrangement direction of the four sub-chambers with lengths a, b, c, and d corresponds to the rotation direction of the scanning device. When the scanning device is a computed tomography (CT) scanner, the detector modules 3 are typically arranged along the rotation direction of the scanning device and operate as the scanning device rotates. In some cases, the air inlet of the cold air cavity of the scanning device is located on one side of the cold air cavity. When the scanning device rotates, the sub-chambers further forward in the rotation direction will come into contact with the cooler air earlier. The number of detector modules corresponding to multiple sub-chambers decreases sequentially in the rotation direction to ensure temperature consistency of the detector modules by adjusting the number of detector modules corresponding to each sub-chamber.

[0077] This disclosure provides a scanning device, combined with Figure 11 As shown, the scanning device includes a main body 200 and a detector 100. Figure 11 To clearly illustrate the layout of detector 100, a partial magnification of the area where detector 100 is located has been provided. The main body 200 of the device is equipped with a cold air chamber 201 and a hot air chamber 202. The air inlet 103 of detector 100 is connected to the cold air chamber 201, and the air outlet 104 of detector 100 is connected to the hot air chamber 202. When the fan 2 is operating, it draws in cold air from the cold air chamber 201 through the air inlet 103 into the first chamber 101, and guides the cold air from the first chamber 101 to the second chamber 102 to blow on the detection module 3. The cold air exchanges heat with the detection module 3 to dissipate heat, and the heated air is then discharged through the air outlet 104 into the hot air chamber 202.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A detector, characterized in that, include: The outer casing defines a first chamber and a second chamber that are connected, and is provided with an air inlet connected to the first chamber and an air outlet connected to the second chamber. The fan is installed in the first chamber and is opposite to the air inlet; The detection module is located in the second chamber and is opposite to the air outlet; The fan has a shell-less structure, and the first chamber can guide the airflow generated by the fan to the second chamber.

2. The detector according to claim 1, characterized in that, The fan is a shell-less centrifugal fan, and the first chamber and the second chamber form an L-shaped air guide channel.

3. The detector according to claim 2, characterized in that, The outer casing includes a first shell and a second shell, both extending along the length of the outer casing, and the first shell and the second shell are connected to each other; The first housing defines a first chamber and an air inlet, and the second housing defines a second chamber and an air outlet. The air inlet and air outlet are located at the two ends of the extension direction of the corresponding part of the second chamber in the L-shaped air guide channel.

4. The detector according to claim 3, characterized in that, Both the first housing and the second housing extend along a predetermined arc in their longitudinal direction, and the dimension of the first housing in the radial direction along the predetermined arc is greater than the dimension of the second housing in the radial direction along the predetermined arc.

5. The detector according to claim 4, characterized in that, The air inlet and the second chamber are staggered along the radial direction of a predetermined arc.

6. The detector according to any one of claims 1 to 5, characterized in that, There are multiple air inlets and fans, all spaced apart along the length of the outer casing, with each fan corresponding to one air inlet. There are multiple detection modules, which are arranged in the second chamber along the length of the outer shell.

7. The detector according to claim 6, characterized in that, The outer casing also includes a plurality of partitions spaced apart along the length of the outer casing, which divide the first chamber into a plurality of independent sub-chambers, each of which is provided with at least one fan.

8. The detector according to claim 7, characterized in that, The area of ​​the chamber opening connecting each sub-chamber to the second chamber is inversely proportional to the heat dissipation of the detection module corresponding to that sub-chamber.

9. The detector according to claim 7, characterized in that, The number of fans in each sub-chamber is the same. The number of detection modules in the end sub-chambers is greater than the number of detection modules in the middle sub-chambers. Alternatively, the number of detection modules in the sub-chambers increases or decreases sequentially along the length of the outer shell.

10. A scanning device, characterized in that, Includes the main body of the device and the detector as described in any one of claims 1 to 9; The main body of the equipment is equipped with a cold air chamber and a hot air chamber. The air inlet of the detector is connected to the cold air chamber, and the air outlet of the detector is connected to the hot air chamber.

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