WO2021098711A1

WO2021098711A1 - Heat dissipation apparatus for ct detector, and ct equipment

Info

Publication number: WO2021098711A1
Application number: PCT/CN2020/129681
Authority: WO
Inventors: 周志阳; 邹一梅
Original assignee: 德瑞科(天津)机械制造有限公司
Priority date: 2019-11-22
Filing date: 2020-11-18
Publication date: 2021-05-27
Also published as: CN112826517A

Abstract

A heat dissipation apparatus for a computed tomography (CT) detector, comprising a housing (11), and a support (1), a rotating disc (12) and a closed detector box (2) provided in the housing (11). The rotating disc (12) is rotatably connected to the support (1). The apparatus further comprises: an internal heat dissipation structure comprising an air flow source provided within the detector box (2), the air flow source promoting the air flow in the detector box (2) to transfer heat generated by a detector module (22) to the inner wall of the detector box (2); and an external heat dissipation structure comprising an annular air flow channel (13) provided in the support (1), the detector box (2) being located in the air flow channel (13), and the housing (11) being provided with an air inlet (8) and an air outlet (7) in communication with the air flow channel (13). Also disclosed is CT equipment having the heat dissipation apparatus.

Description

Heat sink for CT detector and CT equipment

This application claims the priority of the Chinese patent application whose application date is November 22, 2019 and the application number is 201911156424.6. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the technical field of computed tomography (Computed Tomography, CT) detectors, for example, to a heat sink and CT equipment for CT detectors.

Background technique

CT imaging requires an X-ray generating device (abbreviated as a ray source) and an X-ray receiving device (detector module). The ray source and the detector box with the detector module installed inside are both installed on the turntable, so as to surround a certain part of the human body together. Scan the sections one by one. The detector module and its related electrical components generate a lot of heat during the working process. The accumulation of heat in the detector box will easily cause the temperature in the box to be too high, which will affect the detector’s conversion efficiency to X-rays and even affect the work of related electrical components.

At present, in order to prevent light, moisture, dust, X-ray leakage, etc., the detector box is mostly a completely sealed structure, and the external cooling system reduces the temperature of the outer wall of the detector box to indirectly dissipate heat, but the heat dissipation efficiency is low. In addition, in order to speed up the heat dissipation of the detector box, the external heat dissipation system needs to use a larger power fan or air conditioner, which not only increases the cost, but also generates a lot of noise from the high power fan or air conditioner.

For CT detectors used in occasions with a better external environment, an unclosed detector box can be used and the air outside the box can be directly cooled. However, even if the air inlet and outlet are equipped with filters, the outside air will still bring in fine dust and moisture, which will increase the failure rate of the detector.

Summary of the invention

The present application provides a heat dissipation device for CT detectors, which can improve the heat dissipation efficiency in the detector box when a closed detector box is used.

The present application provides a CT device, which can improve the heat dissipation efficiency of the detector box.

An embodiment provides a heat dissipation device for a CT detector, which includes a housing and a bracket arranged in the housing, a turntable, and a closed detector box, the turntable is rotatably connected to the bracket, and further includes:

An internal heat dissipation structure, the internal heat dissipation structure includes an airflow source arranged inside the detector box, the airflow source can promote the air flow in the detector box to transfer the heat generated by the detector module to the detector The inner wall of the container;

An external heat dissipation structure, the external heat dissipation structure includes an annular air flow channel arranged in the bracket, the detector box is located in the air flow channel, and the housing is provided with an air inlet communicating with the air flow channel Mouth and vent.

An embodiment provides a CT device, including the above-mentioned heat dissipation device for a CT detector.

Description of the drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of a heat dissipation device for a CT detector provided by a specific embodiment of the present application after one side of the housing is removed;

2 is a schematic diagram of the three-dimensional structure of the heat dissipation device for CT detectors provided in the specific embodiment of the present application after removing one side of the casing and the barrel;

Fig. 3 is a schematic diagram of a three-dimensional structure of a detector box of a heat sink for a CT detector provided by a specific embodiment of the present application with one cover plate removed.

FIG. 4 is a schematic diagram of an enlarged structure at A in FIG. 3;

5 is a schematic diagram of the front structure of the heat dissipation device for CT detectors provided in the specific embodiment of the present application after removing one side of the casing and the barrel, and a schematic diagram of the air flow direction when the turntable rotates;

6 is a schematic diagram of a three-dimensional structure of a wind collecting hood for a heat sink of a CT detector according to a specific embodiment of the present application;

FIG. 7 is a schematic diagram of the front structure of the heat dissipation device for a CT detector provided by the specific embodiment of the application after removing one side of the casing and the cylinder, and a schematic diagram of the air flow direction when the turntable stops rotating;

Fig. 8 is a graph showing the temperature variation curves of the temperature of the detector module, the airflow temperature in the detector box, and the temperature of the detector box body measured at different stages by using a thermocouple in the present application.

In the picture:

1. Bracket, 2. Detector box, 21, internal fan, 22, detector module, 23, heat sink, 3. wind gathering plate, 4. mounting plate, 5. cylinder, 6, radiation source, 7, output Air outlet, 71, external air outlet fan, 8, air inlet, 9, external air inlet fan, 10, wind gathering hood, 101, wind gathering hood outlet, 11, shell, 12, turntable; 13, air flow channel;

A, the temperature of the detector module, B, the airflow temperature in the detector box, and C, the temperature of the detector box.

Detailed ways

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation The structure and operation cannot therefore be understood as a limitation of this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

Unless otherwise clearly specified and limited, the terms "installation", "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or a detachable connection. It can be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between two components or an interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

Unless otherwise clearly specified and defined, the first feature “on” or “under” the second feature may include the first feature and the second feature in direct contact, or the first feature and the second feature are not in direct contact But through the contact of other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than that of the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

This embodiment provides a CT device. As shown in Figs. 1 to 2, the CT device includes a heat sink for CT detectors. The heat dissipating device for CT detectors includes a housing 11 and a support 1 arranged in the housing 11, a turntable 12, a closed detector box 2, an internal heat dissipation structure and an external heat dissipation structure, and the turntable 12 is rotatably connected to the support 1. The bracket 1 is provided inside the housing 11.

The internal heat dissipation structure includes an airflow source arranged inside the detector box 2, and the airflow source can promote the air flow in the detector box 2 to transfer the heat generated by the detector module 22 to the inner wall of the detector box 2.

The external heat dissipation structure includes an annular airflow channel 13 (refer to FIG. 5) arranged in the bracket 1, the detector box 2 is located in the airflow channel 13, and the housing 11 is provided with an air inlet 8 and an air outlet communicating with the airflow channel 13 7.

In this embodiment, by providing an airflow source in the detector box 2, the airflow source promotes the air flow in the detector box 2 so that the heat generated by the detector module 22 is transferred to the detector box through the inner wall of the detector box 2. The heat is taken away from the outside of 2 through the airflow channel 13, and the combination of the internal heat dissipation structure and the external heat dissipation structure can improve heat dissipation efficiency and ensure that heat does not accumulate on the detector module 22; in addition, the detector box 2 is closed The structure can prevent dust, moisture, light and X-ray leakage.

In order to increase the rapid transfer of heat inside the detector box 2 to the outside of the detector box 2, optionally, the material of the detector box 2 is aluminum alloy, and aluminum alloy has a higher heat conductivity efficiency.

As shown in FIG. 3 and FIG. 4, the airflow source is a plurality of internal fans 21, the plurality of internal fans 21 are arranged in the detector box 2, and the direction of the wind is set toward the detector module 22. A heat dissipation plate 23 is installed on the supporting sheet metal of the detector module 22, and the internal fan 21 is located on the side of the heat dissipation plate 23. Since the internal fan 21 is arranged in the enclosed detector box 2, the noise is low.

In order to promote the exchange of the hot air flow inside the bracket 1 and the cold air flow outside and improve the heat dissipation efficiency, optionally, an air outlet 7 is provided on both sides of the upper part of the housing 11; an air inlet 7 is provided on both sides of the lower part of the housing 11 respectively.口8. In order for the gas to reach the air outlet 7 and the air inlet 8 on the housing 11, correspondingly, the part of the bracket 1 corresponding to the air inlet 8 and the air outlet 7 on the housing 11 is also provided with an air inlet 8 and an air outlet. Port 7.

Optionally, the housing 11 includes a cylinder 5 at its center, and the cylinder 5 passes through the center of the turntable 12. The detector box 2 is connected to the turntable 12 and is located between the cylinder 5 and the inner wall of the bracket 1. The cylinder 5 The outer wall, the turntable 12 and the side wall of the housing 11 and the inner wall of the bracket 1 together form an air flow channel 13, wherein the turntable 12 is located at the first end of the cylinder 5, and the housing 11 is located at the second end of the cylinder 5. The detector box 2 is a semi-arc structure arranged along the periphery of the turntable 12. A mounting plate 4 is provided on the side of the turntable 12 opposite to the detector box 2. The ray source 6 is mounted on the mounting plate 4, and both ends of the mounting plate 4 Butt with the two ends of the detector box 2. Illustratively, the two ends of the cylinder 5 penetrate through two opposite sides of the housing 11. The cross-sections of the two ends of the detector box 2 are gradually reduced toward the ends thereof to facilitate the circulation of gas. When the turntable 12 rotates, the rotating airflow generated by the turntable 12 can be used to dissipate heat from the detector box 2, as shown in FIG. 5, where the arrow direction in the figure is the gas flow direction.

In order to speed up the gas circulation when the turntable 12 stops rotating, and make the heat dissipation effect better, when the turntable 12 stops rotating, the air inlet 8 on the lower side of the housing 11 corresponds to the middle position of the detector box 2, and the second position of the detector box 2 One end corresponds to the air inlet 8 on the other side of the lower part of the housing 11, and the second end of the detector box 2 corresponds to the air outlet 7 on the upper side of the housing 11.

Exemplarily, the external heat dissipation structure further includes a wind gathering structure, which is arranged to gather the airflow entering the bracket 1 from the air inlet 8 and blow it toward the airflow channel 13. Through the arrangement of the wind gathering structure, the heat of the detector box 2 can be quickly taken away and transferred through the airflow channel 13.

As shown in Figure 1, Figure 2 and Figure 6, the wind collecting structure includes a wind collecting plate 3 and a wind collecting hood 10. The wind collecting plate 3 is installed in the bracket 1 and located at the air inlet 8; the wind collecting hood 10 is installed at On the wind collecting plate 3, the outlet 101 of the wind collecting hood is rectangular. The outlet 101 of the wind collecting hood is rectangular, so that the airflow can be blown toward the airflow channel 13 in a slender shape, and the heat dissipation area of the detector box 2 can be increased. Optionally, an external air inlet fan 9 is provided at the inlet of the wind collecting hood 10, and an external air outlet fan 71 is provided at the air outlet 7 (refer to FIG. 5). As shown in FIG. 7, the arrow direction in the figure is the gas flow direction. When the turntable 12 stops rotating, the external intake fan 9 and the external exhaust fan 71 can be used to form an external heat dissipation airflow.

As shown in Figure 8, stage 1 is the temperature curve when both the internal heat dissipation structure and the external heat dissipation structure reach the basic thermal steady state during the working phase; stage 2 is the process of gradual reduction of the external heat dissipation air volume; stage 3 is the system again after the external heat dissipation is completely stopped The basic thermal steady-state process; stage 4 is the thermal steady-state process when both internal and external heat dissipation stop working.

Through the comparison of the change curves of the detector module temperature A, the airflow temperature B in the detector box, and the detector box temperature C, it can be seen that:

The comparison of stage 1 and stage 4 shows that when the internal heat dissipation structure in the present application works, compared with the case where there is no heat dissipation inside and outside, the airflow temperature B in the overall detector box is significantly lower, indicating that there is no heat dissipation in the application and the detector box 2. Compared with the structure, it is not easy to accumulate heat in the working gap stage.

Comparison of the three curves of stage 3 and stage 4: the temperature of the detector module A has risen significantly, while the airflow temperature B in the detector box and the temperature of the detector box body C have no obvious rise, indicating that the internal heat dissipation structure can quickly bring heat to the detector box 2 on the inner wall. The internal circulation stops, the detector module 22 cannot transfer heat quickly in stage 4, and a large amount of heat accumulates. This shows that the internal heat dissipation structure in the present application has the function of quickly transferring the heat of the detector module 22.

The above figure compares stage 1 with stage 2 and stage 3: After the external heat dissipation stops, the airflow temperature B in the detector box rises overall, that is, the external heat dissipation structure has the function of quickly transferring the heat from the outer wall of the detector box 2.

The beneficial effects of this application:

This application simultaneously dissipates the detector box 2 through an internal heat dissipation structure and an external heat dissipation structure. The internal heat dissipation structure includes an airflow source, which is arranged inside the detector box 2, which can promote the gas flow in the detector box 2 and improve the heat dissipation efficiency. , To ensure that heat will not accumulate on the detector module 22; the external heat dissipation structure includes an annular airflow channel 13, the detector box 2 is located inside the airflow channel 13, and the airflow in the airflow channel 13 can increase the heat transfer of the detector box 2 , Improve the heat dissipation efficiency; in addition, the detector box 2 is a closed structure, which can prevent dust, moisture, light and X-ray leakage.

Claims

A heat dissipation device for a computed tomography CT detector, comprising a housing (11), a bracket (1), a turntable (12) and a closed detector box (2) arranged in the housing (11) , The turntable (12) is rotatably connected to the bracket (1), and further includes:

An internal heat dissipation structure, the internal heat dissipation structure includes an airflow source arranged inside the detector box (2), the airflow source can promote the air flow in the detector box (2) to transfer the detector module (22) ) The heat generated is transferred to the inner wall of the detector box (2);

An external heat dissipation structure, the external heat dissipation structure includes an annular air flow channel (13) arranged in the bracket (1), the detector box (2) is located in the air flow channel (13), and the housing (11) is provided with an air inlet (8) and an air outlet (7) communicating with the air flow channel (13).
The heat dissipation device for a computed tomography CT detector according to claim 1, wherein the two sides of the upper part of the housing (11) are respectively provided with one of the air outlets (7); the housing (11) The two sides of the lower part are respectively provided with one of the air inlets (8).
The heat dissipation device for a computed tomography CT detector according to claim 2, wherein the housing (11) comprises a cylinder (5) located in the center of the housing (11), and the cylinder (5) Passing through the center of the turntable (12), the detector box (2) is connected to the turntable (12) and is located between the cylinder (5) and the inner wall of the bracket (1) In between, the outer wall of the cylinder (5), the turntable (12), the side wall of the housing (11) and the inner wall of the bracket (1) jointly form the air flow channel (13).
The heat dissipation device for a computed tomography CT detector according to claim 3, wherein when the turntable (12) stops rotating, the air inlet (8) on one side of the lower part of the housing (11) ) Corresponds to the middle position of the detector box (2), and the first end of the detector box (2) corresponds to the air inlet (8) on the other side of the lower part of the housing (11) Where, the second end of the detector box (2) corresponds to the air outlet (7) on one side of the upper part of the housing (11).
The heat dissipation device for a computed tomography CT detector according to claim 1, wherein the external heat dissipation structure further comprises a wind gathering structure (3, 10), and the wind gathering structure (3, 10) is configured to be The airflow from the air inlet (8) into the bracket (1) is gathered and blown toward the airflow channel (13).
The heat dissipation device for a computed tomography CT detector according to claim 5, wherein the wind gathering structure (3, 10) comprises:

The wind collecting plate (3), the wind collecting plate (3) is installed in the bracket (1) and located at the air inlet (8);

A wind gathering hood (10), the wind gathering hood (10) is installed on the wind gathering plate (3), and the wind gathering hood outlet (101) of the wind gathering hood is rectangular.
The heat dissipation device for a computed tomography CT detector according to any one of claims 1 to 6, wherein an external air intake fan (9) is provided at the air inlet (8), and the air outlet ( 7) An external air outlet fan (71) is provided.
The heat dissipation device for a computed tomography CT detector according to any one of claims 1 to 6, wherein the material of the detector box (2) is aluminum alloy.
The heat dissipation device for a computed tomography CT detector according to any one of claims 1-6, wherein the airflow source is a plurality of internal fans (21), and the plurality of internal fans (21) are arranged at Inside the detector box (2), and the wind direction is set toward the detector module (22).
A computer tomography CT device, comprising the heat dissipation device for a computer tomography CT detector according to any one of claims 1-9.