Liquid-cooled CT detector, temperature control method and CT device

Abstract

The application discloses a liquid-cooled CT detector, a temperature control method and a CT device. The liquid-cooled CT detector comprises a detector module and a refrigerator module. The detector module comprises a detection plate and a detection plate mounting bracket. The lower surface of the detection plate is connected to the upper surface of the detection plate mounting bracket through heat-conducting glue. The detection plate is provided with a second temperature sensor. The detection plate mounting bracket comprises a base plate and a plurality of water inlets and outlets. The base plate is a plate structure and internally provided with a flow channel, both ends of the flow channel penetrating through the lower surface of the base plate and being connected to the water inlets and outlets. The fluid circulation loop of the refrigerator module is connected to the water inlets and outlets. The CT detector temperature control scheme adopting liquid as the cooling medium can ensure that the detector works in the set ideal temperature range and ensures the temperature consistency between the detectors, thereby providing reliable guarantee for the CT image quality.

Description

Technical Field

[0001] This invention relates to a liquid-cooled CT detector, a temperature control method for the liquid-cooled CT detector, and a CT device including the liquid-cooled CT detector, belonging to the field of medical device technology. Background Technology

[0002] The performance of a CT detector plays a crucial role in the quality of CT images. To achieve good image quality, the CT detector needs to operate under ideal conditions. For example, it should be kept within a specific temperature range, and the temperature should be as constant and uniform as possible. This ensures stable performance of the CT detector, maintains consistency across all detectors, and ultimately guarantees the image quality of the CT equipment. Since the CT detector operates inside the CT scanner housing, it is affected by the internal temperature of the entire system; therefore, temperature control of the CT detector is of paramount importance.

[0003] Chinese invention patent ZL 201310741388.6 discloses a device and method for precise temperature control of a CT detector using a closed-loop system. The device includes a sealed cavity, a CT detector, a temperature sensor, a controller, a heating device, and a heat source. The sealed cavity acts as a temperature regulator. The CT detector and temperature sensor are placed within the sealed cavity. The heating device heats the sealed cavity. Based on the temperature sensor's readings, the controller adjusts the heating device to perform closed-loop control of the heating amount in the sealed cavity, thereby maintaining a constant temperature for the CT detector.

[0004] Conventional CT detectors typically use fans to blow air into the detector cavity, indirectly cooling the detector plate. During CT operation, the detector's own structure, the overall internal structure of the CT scanner, and the ambient temperature result in slow temperature control of the CT detector, and significant temperature differences between different CT detectors. This leads to inconsistent data output from each detector, greatly affecting image quality. Furthermore, using fans for detector cooling necessitates the installation of air inlets and outlets on the external side of the detector assembly. In static CT or other multi-source CT scans, this inevitably allows scattered radiation to enter through the fan vents, further impacting system image quality. Summary of the Invention

[0005] The primary technical problem to be solved by this invention is to provide a liquid-cooled CT detector.

[0006] Another technical problem to be solved by the present invention is to provide a temperature control method for the above-mentioned liquid-cooled CT detector.

[0007] Another technical problem to be solved by the present invention is to provide a CT device including the above-mentioned liquid-cooled CT detector.

[0008] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: According to a first aspect of the present invention, a liquid-cooled CT detector is provided, including a detector module and a cooler module; The detector module includes a detection board and a detection board mounting bracket; the lower surface of the detection board is connected to the upper surface of the detection board mounting bracket through thermally conductive adhesive; the detection board is equipped with a second temperature sensor. The detection plate mounting bracket includes a base plate and multiple inlet and outlet ports; the base plate is a plate structure with internal flow channels; the flow channels are designed as curved deep hole structures wrapped inside the base plate; both ends of the flow channels penetrate the lower surface of the base plate and are connected to the inlet and outlet ports. The fluid circulation loop of the refrigeration module is connected to the inlet and outlet water ports.

[0009] Preferably, the refrigeration module includes a cooler, a temperature controller, and a circulation pump; The cooler includes a thermoelectric cooler, a heat sink, a temperature control container, and a fan; the temperature control container is a hollow liquid container structure, with its lower end connected to the cold end of the thermoelectric cooler via the thermally conductive adhesive, and the hot end of the thermoelectric cooler connected to the heat sink via the thermally conductive adhesive; the fan provides airflow to cool the heat sink; a first temperature sensor is provided at the lower end of the temperature control container; The output end of the temperature control container is connected to the input end of the circulation pump; the temperature controller is connected to the semiconductor cooling chip, the first temperature sensor, the second temperature sensor, and the host computer.

[0010] Preferably, the input end of the temperature control container is connected to the inlet and outlet of the detection plate mounting bracket via a hose and a quick-release connector; the output end of the circulation pump is connected to another inlet and outlet of the detection plate mounting bracket via the hose and the quick-release connector.

[0011] Preferably, the detector module comprises multiple modules; The flow channels of the multiple detector modules are connected in series through the hose and the quick-release connector, and in series with the cooler and the circulation pump to form a fluid circulation loop structure.

[0012] Preferably, the liquid-cooled CT detector also includes a common transfer tube; The common transfer pipe includes an upward main pipe and a downward main pipe; both the upward main pipe and the downward main pipe are hollow pipe structures, closed at both ends, and their longitudinal direction is arranged horizontally; The lower end of the upward main pipe is connected to the output end of the circulation pump, and its upper end is connected to the inlet and outlet of each detector module through the hose and the quick-release connector; the lower end of the downward main pipe is connected to the input end of the cooler, and its upper end is connected to another inlet and outlet of each detector module through the hose and the quick-release connector. The flow channels of the multiple detector modules are connected in parallel through the hose, the quick-release connector and the common adapter, and are also connected in parallel with the cooler and the circulation pump to form a fluid circulation loop structure.

[0013] Preferably, the upper surface structure of the base plate is conformally shaped to the detection plate and has a connection structure adapted to the detection plate; the detection plate and the detection plate mounting bracket are fixed by the connection structure; a connector is provided on the lower surface of the base plate to connect the ribbon cable of the detection plate.

[0014] Preferably, the flow channels are arranged in an S-shape or M-shape inside the base plate.

[0015] According to a second aspect of the present invention, a temperature control method for the above-described liquid-cooled CT detector is provided, comprising the following steps: Step S1: Obtain the set value △Tdb of the temperature difference between the detection plate and the temperature control container through experiments, and enter it into the temperature controller; Step S2: The host computer sends the target temperature Ttgd of the second temperature sensor to the temperature controller, and the temperature controller calculates the target temperature Ttgb of the first temperature sensor; where Ttgb = Ttgd - ΔTdb; Step S3: The temperature controller uses Ttgb as the target temperature, collects the real-time temperature Tbox of the first temperature sensor as the feedback value, and outputs Pout to control the cooling power PWM value of the semiconductor refrigeration chip. The temperature of the temperature-controlled container is controlled in a closed loop, thereby controlling the temperature of the detection board. The value of Pout is updated according to the PeriodPout time period.

[0016] Preferably, step S3 further includes the following sub-steps: Sub-step S31: The temperature controller collects the real-time temperature Tbox of the first temperature sensor in real time, calculates the difference △Tbox between the target temperature Ttgb of the first temperature sensor and the real-time temperature Tbox in real time, and calculates the difference △Tdt between the target temperature Ttgd of the second temperature sensor and the real-time temperature Tdt in real time. Sub-step S32: Determine ΔTbox according to the Period Arrive time period; when all ΔTbox values ​​are less than the set threshold within a Period Arrive time period, it is considered that the temperature Tbox has reached the target temperature Ttgb, Pout remains unchanged, and return to sub-step S31; otherwise, adjust the value of Pout according to the value and sign of ΔTbox, and proceed to the next sub-step. Sub-step S33: Determine ΔTdt according to the Period Arrive time period: When all ΔTdt values ​​are less than the set threshold within a Period Arrive time period, it is considered that the real-time temperature Tdt has reached the target temperature Ttgd, and Ttgb remains unchanged, returning to sub-step S31; otherwise, correct the value of ΔTdb according to ΔTdt, calculate Ttgb according to the new ΔTdb, control the cooling power PWM value of the semiconductor refrigeration chip according to Ttgb, and return to sub-step S31.

[0017] According to a third aspect of the present invention, a CT device is provided, including the liquid-cooled CT detector described above.

[0018] Compared with existing technologies, this invention provides a liquid-cooled CT detector temperature control system design. This design effectively overcomes the interference of internal temperature fluctuations and other structural external factors within the CT scanner, ensuring that the detector operates continuously and stably within a preset ideal temperature range, thereby maintaining its optimal performance and making its operation more reliable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a liquid-cooled CT detector in the first embodiment of the present invention; Figure 2 for Figure 1 System schematic diagram of a liquid-cooled CT detector; Figure 3 for Figure 1 A schematic diagram of the detector module; Figure 4 for Figure 3 Schematic diagram of the mounting bracket for the detection plate; Figure 5 for Figure 2 Schematic diagram of the intermediate refrigeration unit; Figure 6 for Figure 5 Operating principle diagram of the intermediate refrigeration unit; Figure 7 This is a schematic diagram of the structure of a liquid-cooled CT detector in the second embodiment of the present invention; Figure 8 This is a schematic diagram of a structure including a common transfer pipe in the third embodiment of the present invention. Detailed Implementation

[0020] The technical content of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] The technical concept of this invention is to use a CT detector temperature control scheme with liquid as the cooling medium, so that the detector operates in a set ideal temperature environment and ensures the temperature consistency between each detector, thereby providing a reliable guarantee for the quality of CT images.

[0022] First Embodiment like Figure 1 As shown, an embodiment of the present invention provides a liquid-cooled CT detector including a detector module 100 and a cooler module 200.

[0023] like Figure 2 As shown, the detector module 100 includes a detection board 1, a detection board mounting bracket 2, and thermally conductive adhesive 3, and the cooling module 200 includes a cooler 4, a temperature controller 5, a circulating pump 6, a hose 7, and a quick-release connector 8.

[0024] like Figure 3 As shown, the detection plate 1 is an X-ray photosensitive and receiving component, and is equipped with a second temperature sensor 15. In the figure, the Z-axis is the feed direction of the scanning bed, the Y-axis is the vertical direction, and the X-axis is the horizontal direction perpendicular to the Z-axis. The second temperature sensor 15 can detect the temperature of the detection plate 1.

[0025] like Figure 4 As shown, the detection plate mounting bracket 2 includes a base plate 21, multiple inlet and outlet ports 22, and connectors 23. The base plate 21 is a plate structure, with its upper surface conforming to the shape of the detection plate 1. For example, it has a planar structure that adheres to the thermally conductive adhesive 3, and recessed grooves to accommodate electrical components and cables. The base plate 21 has connection structures adapted to the detection plate 1, such as locating pin holes and fastener connection holes. The connectors 23 are located on the lower surface of the base plate 21 and are used to connect the cables 16 of the detection plate 1.

[0026] The base plate 21 is provided with flow channels 24, which are curved deep hole structures wrapped inside the base plate 21, such as arranged in an S-shape or M-shape inside the base plate 21. The two ends of the flow channels 24 penetrate through the lower surface of the base plate 21 and are connected to the inlet and outlet ports 22.

[0027] The lower surface of the detection plate 1 is connected to the upper surface of the detection plate mounting bracket 2 via thermally conductive adhesive 3. The detection plate 1 and the detection plate mounting bracket 2 are fixed by the aforementioned connection structure. The vertical projection of the flow channel 24 is covered by the thermally conductive adhesive 3. The heat from the detection plate 1 is transferred to the detection plate mounting bracket 2 via the thermally conductive adhesive 3, and the coolant flowing in the flow channel 24 carries the heat away from the CT equipment. The ribbon cable 16 connects to the connector 23, forming a modular integrated structure.

[0028] like Figure 5 and Figure 6 As shown, the cooler 4 includes thermally conductive adhesive 3, a thermoelectric cooler 9, a heat sink 10, a temperature-controlled container 11, a fan 12, and a first temperature sensor 14. The temperature-controlled container 11 is a hollow liquid container structure. Its lower end is connected to the cold end of the thermoelectric cooler 9 via the thermally conductive adhesive 3, and the hot end of the thermoelectric cooler 9 is connected to the heat sink 10 via the thermally conductive adhesive 3. The heat sink 10 is connected to the fan 12. The heat of the coolant in the temperature-controlled container 11 is transferred to the heat sink 10 through the thermally conductive adhesive 3 and the thermoelectric cooler 9, and the fan 12 provides airflow to cool the heat sink 10. The cold end of the thermoelectric cooler 9 cools the temperature-controlled container 11, while the hot end dissipates heat through the heat sink 10 and the fan 12.

[0029] The input end of the temperature-controlled container 11 is connected to the inlet / outlet 22 of the detection plate mounting bracket 2 via a hose 7 and a quick-release connector 8, and its output end is connected to the input end of the circulation pump 6. The output end of the circulation pump 6 is connected to another inlet / outlet 22 of the detection plate mounting bracket 2 via a hose 7 and a quick-release connector 8. Thus, the cooler 4 (temperature-controlled container 11), the circulation pump 6, and the detection plate mounting bracket 2 (flow channel 24) form a temperature-controlled fluid circulation loop.

[0030] The disconnector 8 is a pipe fitting device with bidirectional self-locking, which can disconnect the pipeline at any time without leakage, so that the detector detection board 2 can be maintained or replaced as needed.

[0031] The first temperature sensor 14 is located at the lower end of the temperature control container 11. It is used to measure the temperature of the coolant after it is cooled by the semiconductor refrigeration chip 9, and is connected to the temperature controller 5 to provide it with a temperature signal.

[0032] Temperature controller 5 connects to thermoelectric cooler 9, first temperature sensor 14, second temperature sensor 15, and host computer. The temperature controller 5 is an electrical unit designed according to the temperature control requirements of the CT equipment and detectors. It can receive commands from the host computer, receive the temperature of the detector detection board and the liquid temperature in the loop, and regulate the thermoelectric cooler 9 of the cooler 4. The target temperature of the detector detection board 1 is sent to the temperature controller 5 by the host computer via communication commands. The temperature controller 5 collects the temperature feedback values ​​from the first temperature sensor 14 (cold end temperature of the temperature control container 11) and the second temperature sensor 15 (temperature of the detector detection board 1) in real time, and realizes closed-loop control of the temperature of the detector detection board 1 through internal programs.

[0033] The temperature control function provided in this embodiment of the invention is implemented by a temperature controller 5. The temperature controller 5 controls the cold end temperature of the thermoelectric cooler 9 through its running program. The cold end of the thermoelectric cooler 9 is connected to the temperature control container 11 through thermally conductive adhesive 3 for effective heat conduction. The temperature control container 11 is a hollow container with good heat conduction. The coolant (water or refrigerant) inside is circulated within the temperature control container 11 and the detection plate mounting bracket 2 under the drive of the circulation pump 6 to achieve thermal equilibrium. The detection plate mounting bracket 2 is effectively connected to the detector detection plate 1 through the thermally conductive adhesive 3. The temperature controller 5 achieves temperature control of the detector detection plate 1 through the above heat conduction link. Medical CT equipment usually operates at room temperature. Under such conditions, the temperature controller 5 only needs to control the cooling of the detector detection plate 1, and the heating process relies on the heat generated by the detector detection plate 1 itself.

[0034] Second Embodiment like Figure 7 As shown, unlike the above embodiments, this embodiment includes multiple detector modules 100. The flow channels 24 of the multiple detector modules 100 are connected in series via hoses 7 and quick-release connectors 8, and are also connected in series with the cooler 4 and the circulating pump 6 to form a fluid circulation loop. The temperature controller 5 is connected to each temperature sensor 15, so that one cooler module 200 provides temperature control function for the multiple detector modules 100.

[0035] Third Embodiment like Figure 8As shown, unlike the above embodiment, this embodiment also includes a common transfer pipe 13. The common transfer pipe 13 includes an upward main pipe 131 and a downward main pipe 132. Both the upward main pipe 131 and the downward main pipe 132 are hollow pipe structures, closed at both ends, and arranged horizontally along their longitudinal direction. The lower end of the upward main pipe 131 is connected to the output end of the circulation pump 6, and its upper end is connected to the upward inlet / outlet 22 of each detection plate mounting bracket 2 via a hose 7 and a quick-release connector 8. The lower end of the downward main pipe 132 is connected to the input end of the cooler 4, and its upper end is connected to the downward inlet / outlet 22 of each detection plate mounting bracket 2 via a hose 7 and a quick-release connector 8. This allows the flow channels 24 of multiple detector modules 100 to be connected in parallel via the hose 7, quick-release connector 8, and common transfer pipe 13, and in parallel with the cooler 4 and circulation pump 6, forming a fluid circulation loop. One cooler module 200 provides temperature control functionality for multiple detector modules 100.

[0036] This parallel configuration allows for maintenance of any single detector module 100 without affecting the fluid flow inside the mounting bracket 2 of the other modules. Furthermore, the parallel configuration enables more effective control of temperature consistency among the individual detector plates 1.

[0037] Fourth embodiment Unlike the embodiments described above, the circulating pump 6 provided in this embodiment is a direct expansion compressor, and the coolant is the refrigerant. The refrigerant undergoes a phase change and absorbs heat during evaporation within the flow channel 24 to improve cooling capacity. For example, the high-temperature, high-pressure refrigerant output by the circulating pump 6 is cooled into a liquid refrigerant by the refrigerator 4. The liquid refrigerant then absorbs heat and evaporates into a gaseous state within the detection plate mounting bracket 2. The gaseous refrigerant is then input into the circulating pump 6 for compression, completing one refrigerant cycle.

[0038] Refrigeration through gas-liquid phase change has a higher cooling capacity than refrigeration through liquid heat conduction.

[0039] Fifth embodiment The fifth embodiment of the present invention provides a temperature control method applicable to the above-mentioned liquid-cooled CT detector, comprising at least the following steps: Step S1: Obtain the set value △Tdb of the temperature difference between the detector detection board 1 and the temperature control container 11 through experiments, and enter it into the temperature controller 5.

[0040] Step S2: The host computer sends the target temperature Ttgd of the second temperature sensor 15 to the temperature controller 5. The temperature controller 5 calculates the target temperature Ttgb of the first temperature sensor 14; where Ttgb = Ttgd - ΔTdb.

[0041] Step S3: The temperature controller 5 uses Ttgb as the target temperature, collects the real-time temperature Tbox of the first temperature sensor 14 as the feedback value, and outputs Pout to control the cooling power PWM (pulse width modulation) value of the semiconductor refrigeration chip 9 to perform closed-loop control of the temperature of the temperature control container 11, thereby controlling the temperature of the probe board 1; the value of Pout is updated according to the Period Pout time period.

[0042] Step S3 further includes the following sub-steps: Sub-step S31: Temperature controller 5 acquires the real-time temperature Tbox of the first temperature sensor 14 in real time, calculates the difference △Tbox between the target temperature Ttgb of the first temperature sensor 14 and the real-time temperature Tbox in real time, and calculates the difference △Tdt between the target temperature Ttgd of the second temperature sensor 15 and the real-time temperature Tdt in real time.

[0043] Sub-step S32: Determine ΔTbox according to the Period Arrive time period; when all ΔTbox values ​​are less than the set threshold within a Period Arrive time period, it is considered that the temperature Tbox has reached the target temperature Ttgb, Pout remains unchanged, and return to sub-step S31; otherwise, adjust the value of Pout according to the value and sign of ΔTbox, and proceed to the next sub-step.

[0044] Sub-step S33: Determine ΔTdt according to the Period Arrive time period: When all ΔTdt values ​​are less than the set threshold within a Period Arrive time period, it is considered that the real-time temperature Tdt has reached the target temperature Ttgd, and Ttgb remains unchanged, returning to sub-step S31; otherwise, correct the value of ΔTdb according to ΔTdt, calculate the new Ttgb according to the new ΔTdb, control the cooling power PWM (pulse width modulation) value of the semiconductor refrigeration chip 9 according to the new Ttgb, and return to sub-step S31.

[0045] The temperature control reaches equilibrium when both ΔTbox and ΔTdt are less than their respective thresholds. If the ambient temperature changes or the detector board itself causes a temperature imbalance, ΔTdt will exceed the threshold, and the program will automatically control the temperature according to the above process.

[0046] Temperature control input parameters: The target temperature Ttgd of the detector detection board is sent by the host computer via communication commands. The initial value of the temperature difference between the detector detection board and the temperature control container, △Tdb, is obtained through experiments, written into the program, and calculated and corrected after entering the control process. Parameters fed back from within the system: The detector detects the real-time temperature Tdt of the board, which is collected and updated in real time by the program and used as a control input. The temperature of the temperature-controlled container (Tbox) is collected and updated in real time by the program and used as a control input. Process variables: The target temperature Ttgb of the temperature-controlled container is calculated based on Ttgd and ΔTdb, and is equal to Ttgd - ΔTdb. The difference between the target temperature and the current temperature on the detector plate, ΔTdt, is calculated based on Ttgd and Tdt, and is equal to Ttgd - Tdt. The difference between the target temperature and the current temperature of the temperature-controlled container, ΔTbox, is calculated based on Ttgb and Tbox, and is equal to Ttgb - Tbox. constant: Pout outputs the update time period PeriodPout, a time constant that controls a fixed value in the program. Determine the time period for reaching the target temperature (Period Arrive), a time constant, a setpoint in the control program; Output: The temperature control PWM output value Pout controls the cooling power PWM (Pulse Width Modulation) value of the thermoelectric cooler. Sixth Embodiment The sixth embodiment of the present invention provides a CT device, which includes the liquid-cooled CT detector provided in the above embodiments and uses the temperature control method provided in the above embodiments.

[0047] In summary, the liquid-cooled CT detector, temperature control method, and CT equipment provided by this invention utilize liquid as the detector's cooling medium to ensure the detector operates within a set ideal temperature environment and to guarantee temperature consistency among all detectors, thus providing reliable assurance for image quality. This invention offers more direct and effective temperature control for the detector, reducing the impact of external factors and significantly minimizing temperature fluctuations. The system employs a modular design, effectively reducing material costs and facilitating subsequent maintenance. Furthermore, the system exhibits high robustness, greatly reducing the probability of failure.

[0048] It should be noted that the above embodiments are merely illustrative examples. The technical solutions of each embodiment can be combined, and all are within the protection scope of this invention.

[0049] The order of steps in this invention can be changed according to actual needs. The order between steps can be changed, and serial processing can be changed to parallel processing. It is not limited to the order of steps listed in the embodiments.

[0050] The terms “upper,” “lower,” “horizontal,” “vertical,” “top,” “bottom,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] The liquid-cooled CT detector, temperature control method, and CT equipment provided by this invention have been described in detail above. Any obvious modifications made by those skilled in the art without departing from the essence of this invention will constitute an infringement of the patent rights of this invention and will incur corresponding legal liability.

Claims

1. A liquid-cooled CT detector, characterized in that... Includes detector module and cooler module; The detector module includes a detection board and a detection board mounting bracket; the lower surface of the detection board is connected to the upper surface of the detection board mounting bracket through thermally conductive adhesive; the detection board is equipped with a second temperature sensor. The detection plate mounting bracket includes a base plate and multiple inlet and outlet ports; the base plate is a plate structure with internal flow channels; the flow channels are designed as curved deep hole structures wrapped inside the base plate; both ends of the flow channels penetrate the lower surface of the base plate and are connected to the inlet and outlet ports. The fluid circulation loop of the refrigeration module is connected to the inlet and outlet water ports.

2. The liquid-cooled CT detector as described in claim 1, characterized in that... The refrigeration module includes a cooler, a temperature controller, and a circulation pump; The cooler includes a thermoelectric cooler, a heat sink, a temperature control container, and a fan; the temperature control container is a hollow liquid container structure, with its lower end connected to the cold end of the thermoelectric cooler via the thermally conductive adhesive, and the hot end of the thermoelectric cooler connected to the heat sink via the thermally conductive adhesive; the fan provides airflow to cool the heat sink; a first temperature sensor is provided at the lower end of the temperature control container; The output end of the temperature control container is connected to the input end of the circulation pump; the temperature controller is connected to the semiconductor cooling chip, the first temperature sensor, the second temperature sensor, and the host computer.

3. The liquid-cooled CT detector as described in claim 2, characterized in that: The input end of the temperature control container is connected to the inlet and outlet of the detection plate mounting bracket via a hose and a quick-release connector; the output end of the circulation pump is connected to another inlet and outlet of the detection plate mounting bracket via the hose and the quick-release connector.

4. The liquid-cooled CT detector as described in claim 3, characterized in that... The detector module comprises multiple modules; The flow channels of the multiple detector modules are connected in series through the hose and the quick-release connector, and in series with the cooler and the circulation pump to form a fluid circulation loop structure.

5. The liquid-cooled CT detector as described in claim 4, characterized in that... This also includes public takeover; The common transfer pipe includes an upward main pipe and a downward main pipe; both the upward main pipe and the downward main pipe are hollow pipe structures, closed at both ends, and their longitudinal direction is arranged horizontally; The lower end of the upward main pipe is connected to the output end of the circulation pump, and its upper end is connected to the inlet and outlet of each detector module through the hose and the quick-release connector; the lower end of the downward main pipe is connected to the input end of the cooler, and its upper end is connected to another inlet and outlet of each detector module through the hose and the quick-release connector. The flow channels of the multiple detector modules are connected in parallel through the hose, the quick-release connector and the common adapter, and are also connected in parallel with the cooler and the circulation pump to form a fluid circulation loop structure.

6. The liquid-cooled CT detector as described in claim 1, characterized in that: The upper surface structure of the base plate is conformally shaped to the detection plate and has a connection structure adapted to the detection plate; the detection plate and the detection plate mounting bracket are fixed by the connection structure; a connector is provided on the lower surface of the base plate to connect the ribbon cable of the detection plate.

7. The liquid-cooled CT detector as described in claim 1, characterized in that: The flow channels are arranged in an S-shape or M-shape inside the base plate.

8. A temperature control method, implemented based on the liquid-cooled CT detector according to any one of claims 1 to 7, comprising the following steps: Step S1: Obtain the set value △Tdb of the temperature difference between the detection plate and the temperature control container through experiments, and enter it into the temperature controller; Step S2: The host computer sends the target temperature Ttgd of the second temperature sensor to the temperature controller, and the temperature controller calculates the target temperature Ttgb of the first temperature sensor; where Ttgb = Ttgd - ΔTdb; Step S3: The temperature controller uses Ttgb as the target temperature, collects the real-time temperature Tbox of the first temperature sensor as the feedback value, and outputs Pout to control the cooling power PWM value of the semiconductor refrigeration chip. The temperature of the temperature-controlled container is controlled in a closed loop, thereby controlling the temperature of the detection board. The value of Pout is updated according to the PeriodPout time period.

9. The temperature control method as described in claim 8, characterized in that... Step S3 further includes the following sub-steps: Sub-step S31: The temperature controller collects the real-time temperature Tbox of the first temperature sensor in real time, calculates the difference △Tbox between the target temperature Ttgb of the first temperature sensor and the real-time temperature Tbox in real time, and calculates the difference △Tdt between the target temperature Ttgd of the second temperature sensor and the real-time temperature Tdt in real time. Sub-step S32: Determine ΔTbox according to the Period Arrive time period; when all ΔTbox values ​​are less than the set threshold within a Period Arrive time period, it is considered that the temperature Tbox has reached the target temperature Ttgb, Pout remains unchanged, and return to sub-step S31; otherwise, adjust the value of Pout according to the value and sign of ΔTbox, and proceed to the next sub-step. Sub-step S33: Determine ΔTdt according to the Period Arrive time period: When all ΔTdt values ​​are less than the set threshold within a Period Arrive time period, it is considered that the real-time temperature Tdt has reached the target temperature Ttgd, and Ttgb remains unchanged, returning to sub-step S31; otherwise, correct the value of ΔTdb according to ΔTdt, calculate Ttgb according to ΔTdb, control the cooling power PWM value of the semiconductor refrigeration chip according to Ttgb, and return to sub-step S31.

10. A CT scanner, characterized in that... This includes the liquid-cooled CT detector as described in any one of claims 1 to 7.

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