CT machine cooling system and CT machine cooling system air volume adjustment method

Abstract

The present invention provides a CT machine cooling system and a method for adjusting the air volume of the CT machine cooling system, and relates to the field of CT machines. The CT machine cooling system includes a CT machine, including a CT machine body and a frame; also includes a cold air duct for connecting the CT machine and the cold air machine; a control system, including a processor and a temperature sensor; the processor includes a signal transmitting processor installed in a machine room and a signal receiving processor installed in a control unit of the cold air machine body; the temperature sensor includes a rack temperature sensor installed at the frame and a machine room temperature sensor installed in the machine room; the rack temperature sensor and the machine room temperature sensor are both electrically connected to the signal transmitting processor, and the signal transmitting processor is electrically connected to the signal receiving processor. The present invention realizes the adjustment of the air volume of the cold air machine through the control system.

Description

Technical Field

[0001] The present invention relates to the technical field of CT machines, and in particular to a cooling system of a CT machine and an air volume regulating method of the cooling system of the CT machine. Background Art

[0002] The CT machine mainly includes a rack, a bed, an operating console, and a CT tube and detector assembly installed in the rack. The CT tube is the X-ray source of the CT and is a high-value consumable. The core of the CT tube is mainly composed of a filament, a rotating target disk, and a vacuum chamber. The filament is heated to produce thermal electrons, which bombard the heavy metal target disk under the action of a high-voltage DC electric field to produce X-rays. When the CT tube is exposed, 99% of the electrical energy is converted into heat energy and 1% of the electrical energy is converted into ray energy. The heat is absorbed by the insulating oil between the tube core and the tube shell, circulated through the oil circuit, and heat is exchanged between the heat exchanger and the air inside the rack where the CT tube is located, and the heat is discharged by the air heat exchange system in the rack. The main cause of CT tube damage is overheating. Reducing the air temperature in the scanning rack can significantly improve the heat dissipation efficiency of the tube and extend the service life of the tube. In the prior art, the air heat exchange in the rack is mainly air cooling. The rack is provided with an air inlet and an air outlet. The heat of the CT tube is heat exchanged with the air in the rack. The rack heat exhaust fan discharges the heat to the machine room, and then the air conditioner in the machine room exchanges the heat to the outside. The CT air cooler is an additional refrigeration device for CT, which is used to improve the original heat dissipation efficiency of CT. The air cooler is provided with a cold air outlet, generates cold air, and delivers it to the rack through a pipe. The air cooler is attached to the original CT to further improve the heat dissipation efficiency of the original CT. The air cooler is provided with a cold air outlet, and delivers the cold air to the rack air inlet through a pipe.

[0003] However, the CT air cooler in the prior art mainly has the following defects:

[0004] 1. As an additional device of the CT machine, the CT air cooler has no communication interface with the CT machine and cannot directly obtain the rack temperature and status data from the CT machine: If the CT air cooler outputs too much cold air, the rack temperature will be too low, which will affect the accuracy of the CT detector or cause other damage; if the CT machine is turned off and the CT air cooler continues to output cold air, it will cause serious imbalance in the temperature inside the rack, and the hot air in the rack may generate condensed water vapor when it meets the cold, which may damage the circuit board;

[0005] 2. If temperature sensors and other sampling components are installed inside the frame, the original structure of the CT machine will be changed or destroyed.

[0006] In view of the above problems, it is particularly important to provide a CT machine cooling device that can determine the temperature state and shutdown state of the rack without destroying or changing the original structure of the CT machine.

[0007] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0008] The object of the present invention is to provide a CT machine cooling system and a CT machine cooling system air volume adjustment method to further improve the heat dissipation efficiency of the CT machine without changing the original structure of the CT machine.

[0009] The first object of the present invention is to provide a CT machine cooling system;

[0010] The second object of the present invention is to provide a method for adjusting the air volume of a CT machine cooling system.

[0011] The present invention provides a CT machine cooling system, comprising:

[0012] A CT machine, comprising a CT body and a rack, wherein the CT body is located inside the rack, and the rack is provided with a cold air inlet and a rack hot air outlet;

[0013] An air cooler, used to cool the CT machine, comprises an air cooler body and a casing, wherein the air cooler body is located inside the casing, and the casing is provided with an air inlet, a hot air outlet of the air cooler, and a cold air outlet;

[0014] A cold air duct, used to connect the CT machine and the cold air blower;

[0015] A control system, comprising a processor and a temperature sensor; the processor comprises a signal transmitting processor installed in a machine room and a signal receiving processor installed in a control unit of a cooling air machine body; the temperature sensor comprises a rack temperature sensor installed at a rack and a machine room temperature sensor installed in a machine room; the rack temperature sensor and the machine room temperature sensor are both electrically connected to the signal transmitting processor, and the signal transmitting processor is electrically connected to the signal receiving processor;

[0016] The room temperature sensor and the rack temperature sensor respectively transmit the detected temperature values ​​to the signal receiving processor through the signal transmitting processor, and compare and analyze the room temperature and the rack temperature through the control unit;

[0017] When the rack temperature is higher than the room temperature, the control unit controls the air cooler to increase the output cold air volume; when the rack temperature is lower than or close to the room temperature, the control unit controls the air cooler to reduce the output cold air volume or stop outputting cold air volume.

[0018] As a further technical solution, there is one rack temperature sensor, which is installed at the rack hot air outlet in the middle of the top of the rack, and a heat exhaust fan is also provided at the rack hot air outlet.

[0019] As a further technical solution, there are two rack temperature sensors, which are respectively installed at the rack hot air outlets on both sides of the top of the rack, and a heat exhaust fan is also provided at the rack hot air outlet.

[0020] As a further technical solution, the cold air outlet of the air cooler is connected to one end of a cold air pipe, and the other end of the cold air pipe is arranged adjacent to the cold air inlet of the rack.

[0021] As a further technical solution, a cold air terminal outlet is provided in the other end of the cold air duct, a guide impeller is provided in the cold air terminal outlet, and an adjustable shutter is provided at the outlet for projecting cold air into the cold air inlet area of ​​the rack.

[0022] As a further technical solution, the CT machine body includes a turntable, on which a tube, a tube heat exchanger and a detector are mounted, and the turntable can rotate around the center of the scanning hole;

[0023] As a further technical solution, the housing of the signal transmission processor is fixed to the top of the machine room and the signal transmission processor is installed above the rack;

[0024] The computer room temperature sensor is installed on the housing, and the rack temperature sensor and the computer room temperature sensor are both fixed by a wiring duct connected to the housing.

[0025] As a further technical solution, the cold air machine body includes a compressor, a condenser, a throttling device and an evaporator, and the compressor, condenser, throttling device and evaporator are connected in sequence through pipelines to form a closed loop.

[0026] As a further technical solution, the rack temperature sensor is electrically connected to the signal transmission processor via a wired manner, or electrically connected via a wireless transmission manner;

[0027] The equipment room temperature sensor is electrically connected to the signal transmission processor via a wired manner, or via a wireless transmission manner.

[0028] The present invention provides a method for adjusting the air volume of a CT machine cooling system, comprising the following steps:

[0029] S001: Turn on the CT machine;

[0030] S002: The computer room temperature sensor and the rack temperature sensor detect the temperature of the computer room and the rack respectively;

[0031] S003: The room temperature sensor and the rack temperature sensor transmit the room temperature and the rack temperature to the signal transmission processor respectively;

[0032] S004: The signal transmitting processor transmits the room temperature and the rack temperature to the signal receiving processor;

[0033] S005: The control unit compares and analyzes the temperature of the computer room and the temperature of the rack;

[0034] S006: The control unit controls the air cooler to increase the output cold air volume, or to reduce the output cold air volume, or to stop the output cold air volume.

[0035] Relative to the prior art, the effects of the present invention are as follows:

[0036] A CT machine cooling system provided by the present invention comprises: a CT machine, comprising a CT machine body and a rack, wherein the CT machine body is located inside the rack, and the rack is provided with a cold air inlet and a rack hot air outlet; an air cooler, used to cool the CT machine, comprising an air cooler body and a casing, wherein the air cooler body is located inside the casing, and the casing is provided with an air inlet, an air cooler hot air outlet, and a cold air outlet; an air cooler pipe, used to connect the CT machine and the air cooler; a control system, comprising a processor and a temperature sensor; the processor comprises a signal transmission processing unit installed in a machine room; The temperature sensor comprises a rack temperature sensor installed at the rack and a room temperature sensor installed in the machine room; the rack temperature sensor and the room temperature sensor are both electrically connected to the signal transmitting processor, and the signal transmitting processor is electrically connected to the signal receiving processor; the room temperature sensor and the rack temperature sensor respectively transmit the detected temperature values ​​to the signal receiving processor through the signal transmitting processor, and compare and analyze the room temperature and the rack temperature through the control unit;

[0037] During operation, when the rack temperature is higher than the room temperature, the control unit controls the air cooler to increase the output cold air volume; when the rack temperature is lower than or close to the room temperature, the control unit controls the air cooler to reduce the output cold air volume or stop outputting cold air volume;

[0038] The CT machine cooling system provided by the present invention detects the temperature of the rack and the machine room respectively through the rack temperature sensor and the machine room temperature sensor, transmits the temperature values ​​at the two places to the signal receiving processor through the signal transmitting processor, and compares them through the control unit. If there is a difference, the control unit controls the air cooler to adjust the air volume. If they tend to be the same, it is determined that the CT machine is turned off, and the control unit controls the air cooler to reduce the air volume or stop outputting cold air. The control system can realize the temperature monitoring and shutdown status judgment of the CT machine, and adjust the air volume of the air cooler at any time, so that the temperature inside the CT machine will not be too low due to the continuous delivery of cold air by the air cooler. Moreover, the CT machine and the air cooler are set separately, and the air cooler will not change the original structure of the CT machine body and the rack.

[0039] The present invention provides a method for adjusting the air volume of a CT machine cooling system, comprising the following steps: S001: turning on the CT machine; the machine room temperature sensor and the rack temperature sensor respectively detect the temperature of the machine room and the rack; the machine room temperature sensor and the rack temperature sensor respectively transmit the machine room temperature and the rack temperature to the signal transmitting processor; the signal transmitting processor transmits the machine room temperature and the rack temperature to the signal receiving processor; the control unit compares and analyzes the machine room temperature and the rack temperature; the control unit controls the air cooler to increase the output cold air volume, or reduce the output cold air volume, or stop outputting the cold air volume.

[0040] The air volume adjustment method of the CT machine cooling system provided by the present invention has the same technical effects and advantages as the above-mentioned CT machine cooling system, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure of the CT machine cooling system provided by the present invention;

[0043] Figure 2 Based on Figure 1 A magnified structure of A;

[0044] Figure 3 Based on Figure 1 A magnified view of the structure of B;

[0045] Figure 4 Based on Figure 1 A magnified view of the structure of C.

[0046] Icons: 100-CT machine; 110-CT body; 111-turntable; 1111-bulb tube; 1112-bulb tube heat exchanger; 1113-detector; 112-bearing; 120-rack; 121-cold air inlet; 122-rack hot air outlet; 123-rack temperature sensor; 124-heat exhaust fan; 200-cooling fan; 210-cooling fan body; 211-control unit; 2111-signal receiving processor; 212-compressor; 220-casing; 221-cooling fan hot air outlet; 222-cold air outlet; 300-machine room; 310-signal transmitting processor; 311-casing; 312-wiring duct; 320-machine room temperature sensor; 400-cooling duct; 410-cooling terminal outlet; 411-guide impeller; 412-adjustable shutters. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0051] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0052] Embodiment 1

[0053] like Figure 1-4 As shown, a CT machine cooling system provided in this embodiment includes: a CT machine 100, including a CT machine body 110 and a rack 120, the CT machine body 110 is located inside the rack 120, and the rack 120 is provided with a cold air inlet 121 and a rack hot air outlet 122; an air cooler 200, used to cool the CT machine 100, including an air cooler body 210 and a casing 220, the air cooler body 210 is located inside the casing 220, and the casing 220 is provided with an air inlet, an air cooler hot air outlet 221 and a cold air outlet 222; a cold air duct 400, used to connect the CT machine 100 and the air cooler 200; a control system, including a processor and a temperature sensor; the processor includes a signal transmitting processor 310 installed in a machine room 300 and a signal receiving processor 2111 installed in a control unit 211 of the air cooler body 210; the temperature sensor includes a signal receiving processor 2111 installed in the machine room 300; and a signal receiving processor 2111 installed in a control unit 211 of the air cooler body 210. The rack temperature sensor 123 at the rack 120 and the machine room temperature sensor 320 installed in the machine room 300; the rack temperature sensor 123 and the machine room temperature sensor 320 are both electrically connected to the signal transmission processor 310, and the signal transmission processor 310 is electrically connected to the signal receiving processor 2111; the machine room temperature sensor 320 and the rack temperature sensor 123 respectively transmit the detected temperature values ​​to the signal receiving processor 2111 through the signal transmission processor 310, and compare and analyze the temperature of the machine room 300 and the temperature of the rack 120 through the control unit 211; when working, when the temperature of the rack 120 is higher than the temperature of the machine room 300, the control unit 211 controls the air cooler 200 to increase the output cold air volume; when the temperature of the rack 120 is lower than or close to the temperature of the machine room 300, the control unit 211 controls the air cooler 200 to reduce the output cold air volume or stop outputting the cold air volume.

[0054] The effective effects of this embodiment are:

[0055] The CT machine cooling system provided in this embodiment detects the temperatures of the rack 120 and the machine room 300 respectively through the rack temperature sensor 123 and the machine room temperature sensor 320, transmits the temperature values ​​at the two places to the signal receiving processor 2111 through the signal transmission processor 310, and compares them through the control unit 211. If there is a difference, the control unit 211 controls the air cooler 200 to adjust the air volume. If they tend to be the same, it is determined that the CT machine 100 is shut down, and the control unit 211 controls the air cooler 200 to reduce the air volume or stop outputting cold air. The control system can monitor the temperature of the CT machine 100 and determine the shutdown status, and adjust the air volume of the air cooler 200 at any time, so that the temperature inside the CT machine 100 will not be too low due to the continuous delivery of cold air by the air cooler 200. In addition, the CT machine 100 and the air cooler 200 are set separately, and the air cooler 200 will not change the original structure of the CT machine 100 body and the rack 120.

[0056] In an optional solution of this embodiment, the signal receiving processor 2111 is a wireless receiving processor.

[0057] In an optional solution of this embodiment, there is one rack temperature sensor 123 , which is installed at the rack hot air outlet 122 in the middle of the top of the rack 120 , and a heat exhaust fan 124 is also provided at the rack hot air outlet 122 .

[0058] In an optional solution of this embodiment, there are two rack temperature sensors 123 , which are respectively installed at the rack hot air outlets 122 on both sides of the top of the rack 120 , and a heat exhaust fan 124 is also provided at the rack hot air outlets 122 . Correspondingly, the rack 120 has two rack hot air outlets 122, and two air flows are formed between the two rack hot air outlets 122 and the cold air inlet 121. Due to the different densities of the components fixed on the turntable 111 and the different degrees of wind blocking, when the turntable 111 is stationary, the resistance of the two air flows is different, and the wind speeds of the two rack hot air outlets 122 are also different. The temperatures of the two rack hot air outlets 122 deviate, especially when the bulb heat exchanger 1112 stops near a rack hot air outlet 122, the deviation of the air outlet temperatures on both sides is particularly obvious. Therefore, it is a better control method for the control unit 211 to use the average value of the received values ​​of the rack temperature sensors 123 on both sides as the control parameter of the ambient temperature of the rack 120.

[0059] It should be noted that a plurality of temperature sensors may be provided in the air outlet area of ​​the rack hot air outlet 122 to measure the temperatures at multiple points, and the average value of the temperatures at the multiple points may be regarded as the ambient temperature of the rack 120 .

[0060] Specifically, when the CT machine 100 is turned off, the heat exhaust fan 124 stops working. If the cold air blower 200 continues to input cold air to the rack 120, it may cause the local area in the rack 120 to be overcooled. The local hot air will generate condensed water vapor when it encounters cold air, which will damage the circuit board and generate unnecessary consumption. After the CT machine 100 is turned off, the heat exhaust fan 124 stops working, and the temperature of the rack hot air outlet 122 of the rack 120 will be consistent with the ambient temperature of the machine room 300. The control unit 211 can judge that the CT machine 100 has been turned off and stop outputting cold air.

[0061] In an optional solution of this embodiment, the cold air outlet 222 of the air cooler 200 is connected to one end of the cold air duct 400 , and the other end of the cold air duct 400 is arranged adjacent to the cold air inlet 121 of the rack 120 .

[0062] In an optional solution of this embodiment, a cold air terminal outlet 410 is provided in the other end of the cold air duct 400, a guide impeller 411 is provided in the cold air terminal outlet 410, and an adjustable shutter 412 is provided at the outlet for projecting cold air into the cold air inlet 121 area of ​​the rack 120.

[0063] In an optional solution of this embodiment, the CT body 110 includes a turntable 111 on which a tube 1111, a tube heat exchanger 1112 and a detector 1113 are mounted, and the turntable 111 can rotate around the center of the scanning hole; the turntable 111 is installed in the scanning hole through a bearing 112.

[0064] Preferably, the temperature of the detector 1113 is usually not lower than 22 degrees Celsius. Therefore, the ambient temperature inside the rack 120 is preferably kept constant at 23-25 ​​degrees.

[0065] Specifically, when the CT is turned on, the heat exhaust fan 124 in the rack 120 keeps running. After the CT is turned on, there are two modes, namely, scanning mode and standby mode. In the scanning mode, the turntable 111 rotates, the airflow in the rack 120 is stirred, and the air temperature inside the rack 120 is balanced; in the standby mode, the turntable 111 will gradually slow down to a standstill, and the airflow between the rack hot air outlet 122 and the cold air inlet 121 will choose a path with less obstruction and lower airflow resistance. The air temperature inside the rack 120 is in an unbalanced state, and the regional temperature of the rack hot air outlet 122 is also in an unbalanced state.

[0066] In an optional solution of this embodiment, the housing 311 of the signal transmission processor 310 is fixed to the top of the computer room 300 and the signal transmission processor 310 is installed above the rack 120; the computer room temperature sensor 320 is installed on the housing 311, and the rack temperature sensor 123 and the computer room temperature sensor 320 are both fixed by a wiring duct 312 connected to the housing 311.

[0067] In an optional solution of this embodiment, the cold air machine body 210 includes a compressor 212, a condenser, a throttling device and an evaporator. The compressor 212, the condenser, the throttling device and the evaporator are connected in sequence through pipelines to form a closed loop.

[0068] In an optional solution of this embodiment, the rack temperature sensor 123 is electrically connected to the signal transmission processor 310 by wired means, or by wireless transmission means; the computer room temperature sensor 320 is electrically connected to the signal transmission processor 310 by wired means, or by wireless transmission means.

[0069] Preferably, the temperature sensor adopts wireless transmission, as the wired wiring is too long and the wire resistance may cause sampling errors.

[0070] Embodiment 2

[0071] The present embodiment provides a method for adjusting the air volume of a CT machine cooling system, comprising the following steps:

[0072] S001: Turn on the CT machine 100;

[0073] S002: The room temperature sensor 320 and the rack temperature sensor 123 detect the temperatures of the room 300 and the rack 120 respectively;

[0074] S003: The room temperature sensor 320 and the rack temperature sensor 123 transmit the room temperature 300 and the rack temperature 120 to the signal transmission processor 310 respectively;

[0075] S004: The signal transmission processor 310 transmits the temperature of the equipment room 300 and the temperature of the rack 120 to the signal reception processor 2111;

[0076] S005: The control unit 211 compares and analyzes the temperature of the equipment room 300 and the temperature of the rack 120;

[0077] S006: The control unit 211 controls the air cooler 200 to increase the output cold air volume, or to reduce the output cold air volume, or to stop outputting the cold air volume.

[0078] The air volume adjustment method of the CT machine cooling system provided in this embodiment has the same technical effects and advantages as the above-mentioned CT machine cooling system, which will not be repeated here.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A CT machine cooling system, installed in a machine room, characterized in that: include: A CT machine, comprising a CT body and a rack, wherein the CT body is located inside the rack, and the rack is provided with a cold air inlet and a rack hot air outlet; An air cooler, used to cool the CT machine, comprises an air cooler body and a casing, wherein the air cooler body is located inside the casing, and the casing is provided with an air inlet, a hot air outlet of the air cooler, and a cold air outlet; A cold air duct, used to connect the CT machine and the cold air blower; A control system, comprising a processor and a temperature sensor; the processor comprises a signal transmitting processor installed in a machine room and a signal receiving processor installed in a control unit of a cooling air machine body; the temperature sensor comprises a rack temperature sensor installed at a rack and a machine room temperature sensor installed in a machine room; the rack temperature sensor and the machine room temperature sensor are both electrically connected to the signal transmitting processor, and the signal transmitting processor is electrically connected to the signal receiving processor; The housing of the signal transmission processor is fixed to the top of the machine room and the signal transmission processor is installed above the rack; The room temperature sensor is mounted on the housing, and the rack temperature sensor and the room temperature sensor are both fixed via a wiring duct connected to the housing; The rack temperature sensor is installed at the rack hot air outlet on the top of the rack; The room temperature sensor and the rack temperature sensor respectively transmit the detected temperature values ​​to the signal receiving processor through the signal transmitting processor, and compare and analyze the room temperature and the rack temperature through the control unit; When the rack temperature is higher than the room temperature, the control unit controls the air cooler to increase the output cold air volume; when the rack temperature is lower than or close to the room temperature, the control unit controls the air cooler to reduce the output cold air volume or stop outputting cold air volume.

2. The CT machine cooling system according to claim 1, characterized in that: There is one rack temperature sensor, which is installed at the rack hot air outlet in the middle of the top of the rack. A heat exhaust fan is also provided at the rack hot air outlet.

3. The CT machine cooling system according to claim 1, characterized in that: There are two rack temperature sensors, which are respectively installed at the rack hot air outlets on both sides of the top of the rack. A heat exhaust fan is also provided at the rack hot air outlet.

4. The CT machine cooling system according to claim 1, characterized in that: The cold air outlet of the air cooler is connected to one end of the cold air pipeline, and the other end of the cold air pipeline is adjacent to the cold air inlet of the rack.

5. The CT machine cooling system according to claim 4, characterized in that: A cold air terminal outlet is arranged in the other end of the cold air duct, a guide impeller is arranged in the cold air terminal outlet, and an adjustable shutter is arranged at the outlet for projecting cold air into the cold air inlet area of ​​the rack.

6. The CT machine cooling system according to claim 1, characterized in that: The CT machine body comprises a turntable, on which a tube, a tube heat exchanger and a detector are mounted, and the turntable can rotate around the center of a scanning hole.

7. The CT machine cooling system according to claim 1, characterized in that: The cold air machine body comprises a compressor, a condenser, a throttling device and an evaporator, and the compressor, condenser, throttling device and evaporator are connected in sequence through pipelines to form a closed loop.

8. The CT machine cooling system according to claim 1, characterized in that: The rack temperature sensor is electrically connected to the signal transmission processor via a wired manner, or via a wireless transmission manner; The equipment room temperature sensor is electrically connected to the signal transmission processor via a wired manner, or via a wireless transmission manner.

9. A method for adjusting the air volume of a CT machine cooling system using the CT machine cooling system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S001: Turn on the CT machine; S002: The computer room temperature sensor and the rack temperature sensor detect the temperature of the computer room and the rack respectively; S003: The room temperature sensor and the rack temperature sensor transmit the room temperature and the rack temperature to the signal transmission processor respectively; S004: The signal transmitting processor transmits the room temperature and the rack temperature to the signal receiving processor; S005: The control unit compares and analyzes the temperature of the computer room and the temperature of the rack; S006: the control unit controls the air cooler to increase the output cold air volume, or to reduce the output cold air volume, or to stop outputting the cold air volume; When the rack temperature is higher than the room temperature, the control unit controls the air cooler to increase the output cold air volume; when the rack temperature is lower than or close to the room temperature, the control unit controls the air cooler to reduce the output cold air volume or stop outputting cold air volume.

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