Magnetic resonance system and cooling system for magnetic resonance system

Abstract

The utility model provides a magnetic resonance system and a cooling system used for the magnetic resonance system. The cooling system comprises a first fluid loop and a second fluid loop. The first fluid circuit is coupled to a thermal load of the magnetic resonance system. And the second fluid loop is used for exchanging heat with the first fluid loop when being opened. The second fluid loop comprises a first outdoor heat exchange channel. The first outdoor heat exchange channel is coupled with a first air heat dissipation module. The first air heat dissipation module is used for guiding outdoor air to conduct heat exchange with the first outdoor heat exchange channel so as to cool fluid in the second fluid loop.

Description

Technical Field

[0001] The utility model relates to the field of medical imaging, in particular to a magnetic resonance (MR) system and a cooling system for a magnetic resonance system. Background Art

[0002] Magnetic resonance systems usually include a water cooling system, which can cool various heat loads of the magnetic resonance system to ensure that each heating device can work properly. The heat loads usually include high-power electronic devices such as gradient coils, gradient drivers, radio frequency power amplifiers, etc., and also include a compressor assembly dedicated to cooling superconducting magnets, among which helium compressor assemblies are more widely used.

[0003] The core component of the traditional water cooling system includes a compressor assembly, among which fluorine compressor assemblies are more widely used. In order to keep the superconducting magnet in a superconducting state continuously, the helium compressor assembly needs to work 24 hours a day to provide a low-temperature environment for the superconducting magnet. Therefore, the fluorine compressor assembly of the water cooling system also needs to work continuously to ensure the normal operation of the water cooling system. This generates a very large cooling demand and power consumption. Summary of the Utility Model

[0004] One aspect of the utility model provides a cooling system for a magnetic resonance system. The cooling system includes a first fluid circuit and a second fluid circuit. The first fluid circuit is coupled to the heat load of the magnetic resonance system. The second fluid circuit is used for heat exchange with the first fluid circuit when it is turned on. The second fluid circuit includes a first outdoor heat exchange channel. The first outdoor heat exchange channel is coupled with a first air cooling module. The first air cooling module is used to guide outdoor air to exchange heat with the first outdoor heat exchange channel to cool the fluid in the second fluid circuit.

[0005] On the other hand, the cooling system further includes a third fluid circuit, a refrigerant cooling module and a controller. The third fluid circuit is used for heat exchange with the first fluid circuit when it is turned on. The refrigerant cooling module is used to cool the third fluid circuit. The controller is used to select to turn on the second fluid circuit or the third fluid circuit and the refrigerant cooling module based on the outdoor temperature.

[0006] On the other hand, the third fluid circuit includes a second outdoor heat exchange channel. The second outdoor heat exchange channel is used for heat exchange with the refrigerant cooling module.

[0007] On the other hand, a switching valve is connected between the second outdoor heat exchange channel and the first outdoor heat exchange channel. The controller selects to turn on the second fluid circuit or the third fluid circuit by operating the switching valve.

[0008] On the other hand, the second fluid circuit and the third fluid circuit share an indoor heat exchange channel. The indoor heat exchange channel is used for heat exchange with the first fluid circuit. The switching valve includes a first end, a second end, and a third end. The first end of the switching valve communicates with the indoor heat exchange channel. The second end of the switching valve communicates with the first outdoor heat exchange channel. The third end of the switching valve communicates with the second outdoor heat exchange channel. Wherein, the controller is used to control the first end of the switching valve to communicate with the second end to open the second fluid circuit, or control the first end of the switching valve to communicate with the third end to selectively open the third fluid circuit.

[0009] On the other hand, the first outdoor heat exchange channel and the first air cooling module are coupled to the refrigerant cooling module.

[0010] On the other hand, the refrigerant cooling module includes a condenser. The first outdoor heat exchange channel of the second fluid circuit is stacked with the condenser.

[0011] On the other hand, the first outdoor heat exchange channel and the first air cooling module are separately arranged from the refrigerant cooling module. The cooling system further includes a second air cooling module. The second air cooling module is coupled to the refrigerant cooling module.

[0012] On the other hand, the second fluid circuit further includes a flow regulation module communicating with the first outdoor heat exchange channel. The controller is used to operate the flow regulation module based on the outdoor temperature to control the amount of fluid flowing through the first outdoor heat exchange channel.

[0013] On the other hand, the second fluid circuit includes an indoor heat exchange channel. The indoor heat exchange channel is used for heat exchange with the first fluid circuit. The flow regulation module is a fluid mixing valve, and the fluid mixing valve includes a first end, a second end, and a third end. The first end of the fluid mixing valve communicates with the indoor heat exchange channel. The second end of the fluid mixing valve communicates with the fluid inlet of the first fluid channel. The third end of the fluid mixing valve communicates with the fluid outlet of the first fluid channel.

[0014] On the other hand, the refrigerant cooling module includes an evaporator. The second outdoor heat exchange channel of the third fluid circuit is used for heat exchange with the evaporator.

[0015] On the other hand, the cooling system further includes an outdoor temperature detection unit, which is used to send the detected outdoor temperature to the controller.

[0016] On the other hand, the air cooling module includes a fan.

[0017] On the other hand, when the outdoor temperature is lower than or equal to a specific temperature, the controller turns on the second fluid circuit; when the outdoor temperature is higher than the specific temperature, the controller turns on the third fluid circuit.

[0018] Another aspect of the present utility model provides a cooling system for a magnetic resonance system. The cooling system includes a first fluid circuit, a second fluid circuit, and a controller. The first fluid circuit is coupled to the heat load of the magnetic resonance system. The second fluid circuit is configured to exchange heat with the first fluid circuit when turned on. The second fluid circuit includes a first outdoor heat exchange channel. The first outdoor heat exchange channel is coupled with a first air cooling module. The first air cooling module is configured to guide outdoor air to exchange heat with the first outdoor heat exchange channel to cool the fluid in the second fluid circuit. The controller is configured to turn on the second fluid circuit within a first preset time period and turn off the second fluid circuit within a second preset time period.

[0019] Another aspect of the present utility model provides a magnetic resonance system, including a heat load and the cooling system for a magnetic resonance system as described in the above aspect.

[0020] It should be understood that the above brief description is provided to introduce in a simplified form some concepts that will be further described in the detailed implementation. This does not mean identifying the key or essential features of the claimed subject matter, the scope of which is uniquely defined by the claims following the detailed description. Furthermore, the claimed subject matter is not limited to implementing any disadvantages mentioned above or in any section of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] With reference to the accompanying drawings, the present utility model will be better understood by reading the following description of non-limiting embodiments, wherein:

[0022] Figure 1 A schematic diagram of an exemplary magnetic resonance system according to some embodiments is shown;

[0023] Figure 2 Shown is Figure 1 a schematic diagram of the superconducting magnet and its cooling device in

[0024] Figure 3 an example of an existing water cooling system;

[0025] Figure 4 A schematic diagram of a cooling system for a magnetic resonance system according to some embodiments of the present utility model is shown;

[0026] Figure 5 A schematic diagram of a cooling system for a magnetic resonance system according to other embodiments of the present utility model is shown;

[0027] Figure 6 Shows a schematic diagram of a cooling system for a magnetic resonance system according to other embodiments of the present invention;

[0028] Figure 7 Shows a schematic diagram of a cooling system for a magnetic resonance system according to other embodiments of the present invention;

[0029] Figure 8 Shows the operating state of the cooling system 600 when the outdoor temperature is relatively low;

[0030] Figure 9 Shows the operating state of the cooling system 700 when the outdoor temperature is relatively low;

[0031] Figure 10 Shows the operating state of the cooling system 600 when the outdoor temperature is relatively high;

[0032] Figure 11 Shows the operating state of the cooling system 700 when the outdoor temperature is relatively high.

[0033] The accompanying drawings show the components described for the magnetic resonance system and the cooling system for the magnetic resonance system. Together with the following description, the accompanying drawings illustrate and explain the structural principles, methods, and principles described herein. In the accompanying drawings, for clarity, the thickness and dimensions of the components may be enlarged or otherwise modified. Well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the components, systems, and methods described. Detailed embodiments

[0034] The following will describe the detailed embodiments of the present invention. It should be noted that in the specific description of these embodiments, for the sake of concise description, this specification cannot describe all the features of the actual embodiments in detail. It should be understood that in the actual implementation process of any one of the embodiments, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet the system-related or business-related restrictions, various specific decisions are often made, and these will also change from one embodiment to another. In addition, it should also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present invention, some design, manufacturing, or production changes based on the technical content disclosed in the present invention are only conventional technical means and should not be understood as the content of the present invention being insufficient.

[0035] Unless otherwise defined, technical or scientific terms used in the claims and the specification shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms used in this specification and the claims do not denote any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "comprising", "including", and the like mean that the elements or items appearing before "comprising" or "including" encompass the elements or items listed after "comprising" or "including" and their equivalent elements, without excluding other elements or items. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. In addition, it should be understood that the reference to "one embodiment" or "an embodiment" of the present disclosure is not to be construed as precluding the existence of additional embodiments that also incorporate the recited features.

[0036] Reference Figure 1 , shows a schematic diagram of an exemplary MR (Magnetic Resonance) magnetic resonance system 100 according to some embodiments. The operation of the magnetic resonance system 100 is controlled by an operator workstation 110, which includes an input device 114, a control panel 116, and a display 118. The input device 114 can be a joystick, keyboard, mouse, trackball, touch-activated screen, voice control, or any similar or equivalent input device. The control panel 116 can include a keyboard, touch-activated screen, voice control, buttons, sliders, or any similar or equivalent control device. The operator workstation 110 is coupled to and communicates with a computer system 120, which enables the operator to control the generation and viewing of images on the display 118. The computer system 120 includes a plurality of components that communicate with each other via electrical and / or data connection modules 122. The connection module 122 can be a direct wired connection, a fiber optic connection, a wireless communication link, or the like. The computer system 120 can include a central processing unit (CPU) 124, a memory 126, and an image processor 128. In some embodiments, the image processor 128 can be replaced by image processing functions implemented in the CPU 124. The computer system 120 can be connected to an archival media device, permanent or backup memory, or a network. The computer system 120 can be coupled to and communicate with a separate magnetic resonance imaging (MRI) system controller 130.

[0037] The MRI system controller 130 includes a set of components that communicate with each other via an electrical and / or data connection module 132. The connection module 132 can be a direct wired connection, a fiber optic connection, a wireless communication link, etc. The MRI system controller 130 can include a CPU 131, a sequence pulse generator 133 that communicates with the operator workstation 110, a transceiver (or RF transceiver) 135, a memory 137, and an array processor 139. In some embodiments, the sequence pulse generator 133 can be integrated into the magnetic resonance component 140 of the magnetic resonance system 100.

[0038] The object 170 to be MR scanned can be positioned via a scanning bed within the cylindrical imaging volume 146 of the magnetic resonance component 140. The MRI system controller 130 controls the scanning bed to travel along the Z-axis direction of the magnetic resonance system to transfer the object 170 into the imaging volume 146. The magnetic resonance component 140 includes a superconducting magnet body 143 having a superconducting coil 144, a radio frequency coil assembly, and a gradient coil assembly 142. The superconducting coil 144 has a magnet bore to form the cylindrical imaging volume 146. The superconducting coil 144 provides a static uniform longitudinal magnetic field B0 throughout the cylindrical imaging volume 146 during operation. The radio frequency coil assembly can include a body coil 148 and a surface coil 149, which can be used to transmit and / or receive radio frequency signals.

[0039] The MRI system controller 130 can receive commands from the operator workstation 110 to indicate the MR scan sequence to be executed during the MR scan. The sequence pulse generator 133 of the MRI system controller 130 operates based on the indicated sequence to send instructions describing the timing, intensity, and shape of the radio frequency pulses and gradient pulses in the sequence to operate the system components that execute the sequence.

[0040] The radio frequency pulses in the scan sequence sent by the sequence pulse generator 133 can be generated via the transceiver 135 and amplified by a radio frequency power amplifier 162. The amplified radio frequency pulses are provided to the body coil 148 via a transmit / receive switch (T / R switch) 164. The body coil 148 then provides a transverse magnetic field B1 that is substantially perpendicular to B0 throughout the cylindrical imaging volume 146. The transverse magnetic field B1 is used to excite the excited nuclei (or protons) in the scanned object's body to generate an MR signal.

[0041] The gradient pulses in the scan sequence sent by the sequence pulse generator 133 can be generated via a gradient controller 136 and act on a gradient driver system 150, which includes G x 、G y and G z amplifiers, etc. G x 、G y and G zEach of the gradient amplifiers is for exciting a corresponding gradient coil in the gradient coil assembly 142 to generate a gradient magnetic field superimposed on the static magnetic field and for magnetic field gradients for spatially encoding MR signals during MR scanning.

[0042] The components of the gradient driver system 150 can be powered by a gradient power supply 180.

[0043] The sequence pulse generator 133 is coupled to and communicates with a scan room interface system 145 that receives signals from various sensors associated with the state of the magnetic resonance assembly 140. The scan room interface system 145 is also coupled to and communicates with a patient positioning system 147 that sends and receives signals to control movement of the patient table to a desired position for MR scanning. In some embodiments, the scan room interface system 145 can include a wall plate (not shown in the figures) disposed between the scan room and the equipment room.

[0044] The RF coil assembly can include a body coil 148 that provides a transverse magnetic field B1 in operation, the transverse magnetic field B1 being substantially perpendicular to B0 throughout the cylindrical imaging volume 146. Specifically, a transceiver 135 in the MRI system controller 130 generates RF excitation pulses amplified by a radio frequency power amplifier 162 and provides them to the body coil 148 through a transmit / receive switch (T / R switch) 164. The RF coil assembly can also include a surface coil 149 for imaging different anatomical structures of a patient undergoing an MR scan. The body coil 148 and the surface coil 149 can be configured to operate in a transmit and receive mode, a transmit mode, or a receive mode.

[0045] As described above, the body coil 148 and the RF surface coil 149 can be used to transmit RF excitation pulses and / or receive the resulting MR signals from a patient undergoing an MR scan. The MR signals emitted by the nuclei excited in the patient's body during the MR scan can be sensed and received by the body coil 148 or the surface coil 149 and sent back through the T / R switch 164 to a preamplifier 166. The T / R switch 164 can be controlled by a signal from the sequence pulse generator 133 to electrically connect the radio frequency power amplifier 162 to the body coil 148 during the transmit mode and connect the preamplifier 166 to the body coil 148 during the receive mode. The T / R switch 164 can also enable the surface coil 149 to be used in the transmit mode or the receive mode.

[0046] In some embodiments, the MR signals sensed and received by the body coil 148 or the RF surface coil 149 and amplified by the preamplifier 166 are demodulated, filtered, and digitized in the receiving section of the transceiver 135 and stored in the memory 137 as an array of raw image data for post-processing. A reconstructed magnetic resonance image can be obtained by transforming / processing the stored raw image data.

[0047] In some embodiments, the MR signals sensed and received by the body coil 148 or the RF surface coil 149 and amplified by the preamplifier 166 are demodulated, filtered, and digitized in the receiving section of the transceiver 135 and transmitted to the memory 137 in the MRI system controller 130. For each image to be reconstructed, the data is rearranged into a separate image data array, and each of these separate image data arrays is input to the array processor 139, which is operated to Fourier transform the data into an array of image data.

[0048] The array processor 139 uses a transform method, most commonly the Fourier transform, to create an image from the received MR signals. These images are transferred to the computer system 120 and stored in the memory 126. In response to commands received from the operator workstation 110, the image data can be stored in long-term memory or can be further processed by the image processor 128 and transferred to the operator workstation 110 for presentation on the display 118.

[0049] The magnetic resonance system 100 may also include a cooling device 200 for cooling the superconducting magnet, which will be described in detail below in connection with Figure 2 this.

[0050] Referring to Figure 2 , the superconducting magnet includes a superconducting magnet body 143 and a superconducting coil 144 wound around the superconducting magnet body 143. The superconducting coil 144 is used to generate a main magnetic field, and the superconducting coil 144 needs to be cooled to the superconducting state to maintain the required main magnetic field strength. For this purpose, the superconducting coil 144 is immersed in a cryostat 210, and the cryostat 210 is used to contain a cryogenic refrigerant, such as liquid helium. Specifically, the cryostat 210 can surround the superconducting magnet body 143. In addition to being immersed in the cryostat, the superconducting coil 144 can exchange heat with the cryogenic refrigerant in other ways to reach the required temperature. The cryostat 210 can be disposed in a thermal shield 220, and a vacuum shielding region can be provided between the thermal shield 220 and the cryostat 210. The thermal shield 220 and the vacuum shielding region isolate the cryogenic refrigerant from external heat sources, thereby preventing the evaporation of the cryogenic refrigerant.

[0051] The cooling device 200 further includes a refrigerant compressor 230, which can be, for example, a helium compressor. The refrigerant compressor 230 is used to compress the gaseous refrigerant. The compressed gaseous refrigerant becomes liquid after being cooled via the refrigerant pipeline 240 and circulates to the cryogenic container 210 to cool the superconducting coil 144 in the cryogenic container 210. The refrigerant pipeline 240 can include, for example, a cold head 241. In the cryogenic container 210, part of the liquid refrigerant becomes gaseous refrigerant again due to adsorbing the heat load, and it can circulate back to the refrigerant compressor 230 via the circuit 250 to be compressed again.

[0052] It should be understood that the above-mentioned magnetic resonance system 100 and the cooling device 200 therein are only for illustration, and each of them can include more, fewer and / or different components.

[0053] During the operation of the magnetic resonance system, the volatilization of the cryogenic refrigerant should be avoided. On the one hand, the volatilization of the refrigerant may cause the superconducting magnet to quench, and re-excitation will incur a large cost. On the other hand, the cryogenic refrigerant itself is relatively expensive, and volatilization will result in a large cost waste and may also bring safety problems. Therefore, it is necessary to rely on the cooling device 200 to continuously provide the low-temperature environment required by the superconducting coil, which requires ensuring that the refrigerant compressor 230 in the cooling device 200 continuously operates normally. Otherwise, it may not work properly and cause quenching. Therefore, it is necessary to further cool the cooling device 200.

[0054] One or more components of the magnetic resonance system 100 are referred to as heating components or heat loads. The heat load can include, for example, one or more of the above-mentioned electronic modules such as the gradient driver system 150, the gradient power supply 180, the radio frequency power amplifier 162, the T / R switch 164, and the MRI system controller 130. The heat load can also include one or more components of the above-mentioned cooling device 200.

[0055] Figure 3 An example of an existing water cooling system 300 is shown, which is used to cool one or more of the above-mentioned heat loads. The water cooling system 300 includes a water cooling unit 310, a cooling pipeline 320, and a site water circuit 330. The water cooling unit 310 includes a refrigerant assembly 312, and the refrigerant assembly 312 is used to form a refrigerant (such as Freon) circuit to cool the water in the site water circuit 330 to generate low-temperature cooling water. The cooling pipeline 320 is used to couple with one or more heat loads. For example, by being close to or in contact with the heat load, it absorbs the heat dissipated by the heat load to generate hot water. The low-temperature cooling water in the site water circuit 330 further exchanges heat with the hot water in the cooling pipeline 320, so that the cooling pipeline 320 generates cooling water, and the cooling water is used again to dissipate heat from the heat load, and so on in a cycle. The water cooling unit 310 usually operates continuously to meet the heat dissipation requirements, and thus consumes a large amount of energy.

[0056] The present utility model provides a cooling system of at least one embodiment, which has a part coupled to one or more heat loads for cooling the heat load. Refer to Figure 4 , the cooling system 400 includes a first fluid circuit 410 and a second fluid circuit 420. The first fluid circuit 410 is coupled to the heat load of the magnetic resonance system. The second fluid circuit 420 exchanges heat with the first fluid circuit 410 when it is turned on. The second fluid circuit 420 includes a first outdoor heat exchange channel 421, and a first air cooling module 440 is coupled to the first outdoor heat exchange channel 421. The first air cooling module 440 is used to guide outdoor air to exchange heat with the first outdoor heat exchange channel 421 to cool the fluid in the second fluid circuit 420.

[0057] Optionally, the cooling system 400 may further include a controller 430, and the controller 430 is used to turn on or off the second fluid circuit 420 based on the outdoor temperature.

[0058] In one example, the controller 430 turns on the second fluid circuit 420 when the outdoor temperature is relatively low. The outer wall of the pipeline of the first outdoor heat exchange channel 421 or the gap formed between the outer walls of the pipelines can form an air channel. The first air cooling module 440 can guide the cold outdoor air to flow through the air channel to cool the fluid in the second fluid circuit to a lower temperature. The first air cooling module 440 may include a fan. The first fluid circuit 410 is coupled to the heat load to absorb the heat generated by the heat load, and the fluid therein has an increased temperature after flowing through the heat load. The fluid at a lower temperature in the second fluid circuit 420 exchanges heat with the fluid at a higher temperature in the first fluid circuit 410, thereby cooling the fluid in the first fluid circuit 410 to the temperature required for heat dissipation, without using a refrigerant cooling device (such as at least including a refrigerant compressor) for fluid cooling, reducing the energy consumption.

[0059] In one embodiment, when the outdoor temperature is lower than or equal to a specific temperature, the controller 430 turns on the second fluid circuit 420; when the outdoor temperature is higher than the specific temperature, the controller 430 turns off the second fluid circuit 420. The specific temperature may be about 10 degrees, for example.

[0060] In summary, the second fluid circuit can be turned on when the outdoor temperature is relatively low, and thus can be applied in winter, at night, or other periods with relatively low temperatures. Therefore, the controller 430 can also be set to turn on the second fluid circuit 420 within a first preset time period and turn off the second fluid circuit 420 within a second preset time period. The first preset time period and the second preset time period can be determined based on the temperature prediction within that time period. For example, the first preset time period and the second preset time period can respectively include a continuous plurality of hours, days, weeks, months, or seasons. However, when the magnetic resonance system is used in a place with a low temperature all year round, the second fluid circuit can also be used all the time without being turned on or off based on the outdoor temperature. In this case, the controller 430 may not be required.

[0061] In an embodiment of the present utility model, by providing a second fluid circuit 420 to cool the first fluid circuit 410 serving as a heat load heat dissipation pipeline, and the second fluid circuit 420 has an outdoor channel coupled to the first air heat dissipation module 440, the cold air outdoors is used to provide the cold quantity required by the second fluid circuit 420, thereby eliminating the need to use a refrigerant compression assembly for heat dissipation and reducing energy consumption.

[0062] In an embodiment of the present utility model, the first fluid circuit 410 and the second fluid circuit 420 may respectively further include an indoor heat exchange channel 412 and an indoor heat exchange channel 422. The fluid in the first fluid circuit 410 exchanges heat with the fluid flowing through the indoor heat exchange channel 422 in the indoor heat exchange channel 412 to cool the fluid heated by the heat load.

[0063] Figure 5 A cooling system 500 for a magnetic resonance system according to another embodiment of the present utility model is shown, which includes Figure 4 All or part of the components of the shown cooling system. For example, the cooling system 500 includes the above-mentioned first fluid circuit 410, second fluid circuit 420, and controller 430. The cooling system 500 may further include an outdoor temperature detection unit 560. The outdoor temperature detection unit 560 is configured to send the detected outdoor temperature to the controller 430. The outdoor temperature detection unit 560 may be coupled to the first outdoor heat exchange channel 421 or the first air heat dissipation module 440. For example, the outdoor temperature detection unit 560 may be disposed on the outer surface of the first outdoor heat exchange channel 421 or the housing of the first air heat dissipation module 440. In addition, the outdoor temperature detection unit 560 may also be coupled to the second outdoor heat exchange channel 621 or the second air heat dissipation module 640 described below in a similar manner.

[0064] In an embodiment of the present utility model, the second fluid circuit 420 further includes a flow rate adjustment module 570 communicating with the first outdoor heat exchange passage 421. The controller 430 is configured to operate the flow rate adjustment module 570 based on the outdoor temperature to control the amount of fluid flowing through the first outdoor heat exchange passage 421. By operating the flow rate adjustment module 570 for flow rate control, when the outdoor temperature is too low, less fluid flows through the first outdoor heat exchange passage 421, avoiding the problem of the fluid temperature being too low caused by a large amount of fluid being cooled.

[0065] Specifically, the flow rate adjustment module 570 is a fluid mixing valve, which includes a first end 571, a second end 572, and a third end 573. The first end 571 of the fluid mixing valve communicates with the indoor heat exchange passage 422 of the second fluid circuit 420. The second end 572 communicates with the fluid inlet of the first outdoor heat exchange passage 421. The third end 573 communicates with the fluid outlet of the first outdoor heat exchange passage 421. The controller 430 performs flow rate control based on the outdoor temperature by operating the conduction degrees of the first end 571 of the fluid mixing valve (e.g., the flow rate adjustment module 570) with the second end 572 and the third end 573 respectively. When the outdoor temperature is relatively low, for example, below 0 °C, only a part of the fluid flowing out of the indoor heat exchange passage 422 can flow into the first outdoor heat exchange passage 421 via the first end 571 and the second end 572 respectively, while another part of the fluid flowing out of the indoor heat exchange passage 422 bypasses the first outdoor heat exchange passage 421 after passing through the first end 571 and the third end 573 respectively, and mixes with the fluid flowing out of the first outdoor heat exchange passage 421 at the fluid outlet of the first outdoor heat exchange passage 421. Therefore, by mixing the low-temperature fluid and the high-temperature fluid, the fluid returning to the indoor heat exchange passage 422 has a suitable cooling temperature.

[0066] In an embodiment of the present utility model, the first fluid circuit 410 and the second fluid circuit 420 may respectively include pumps 516 and 526 for fluid circulation.

[0067] In an embodiment of the present utility model, the first fluid circuit 410 and the second fluid circuit 420 are also respectively connected to water tanks for supplementing fluid. For example, the first fluid circuit 410 is connected to the water tank 517, and the second fluid circuit 420 is connected to the water tank 527.

[0068] In an embodiment of the present utility model, the first fluid circuit 410 also includes a flow rate adjustment valve 518, which may be a fluid mixing valve. For example, it includes three ports, one of which communicates with the fluid outlet of the indoor heat exchange passage 422, one communicates with the fluid inlet of the indoor heat exchange passage 422 and the fluid outlet of the heat load cooling pipeline, and the other communicates with the fluid inlet of the heat load cooling pipeline. The heat load cooling pipeline may be a part of the first fluid circuit 410 for coupling with the heat load.

[0069] The first fluid circuit 410 may be coupled with a temperature detection device (not shown in the figure) for feeding back the temperature at at least one position of the detected first fluid circuit 410 to the controller 430. The controller 430 may operate the flow control valve 518 based on the temperature at the at least one position to control the amount of cold water flowing to the heat load.

[0070] In an embodiment of the present utility model, "coupling" may include, but is not limited to, contacting each other, approaching, connecting, heat exchange, etc.

[0071] In an embodiment of the present utility model, the "heat exchange channel" in the "fluid circuit" refers to at least one section of the fluid channel in the fluid circuit, and this channel can be coupled with an external heat exchange channel or a heat exchange device so that the fluid is heated or cooled when flowing through this channel.

[0072] In an embodiment of the present utility model, the "outdoor heat exchange channel" and the "indoor heat exchange channel" respectively refer to that at least a part of this channel is arranged outdoors or indoors, or the loop realizes heat exchange outdoors or indoors. Among them, "indoor" can be within a medical building. Specifically, the indoor heat exchange channel 422 can be arranged in the water-cooling equipment room of the medical building. Correspondingly, "outdoor" can be outside the medical building.

[0073] In an embodiment of the present utility model, "communicating" means connecting to each other to form a fluid passage. Each fluid circuit may include multiple sequentially connected parts, and adjacent two parts can be connected together through a pipeline connector to form a fluid passage. For example, the outdoor part and the indoor part in the second fluid circuit 420 can communicate with each other via a pipeline connector.

[0074] In an embodiment of the present utility model, the "fluid" may include water or other circulating coolants. Specifically, the second fluid circuit 420 can be used to circulate (or recycle) site water, and the site water refers to the central chilled water installed in a hospital or a medical research institution.

[0075] Figure 6 A cooling system 600 for a magnetic resonance system according to another embodiment of the present utility model is shown, which may include Figure 4 or Figure 5Some or all of the components of the cooling system shown. For example, the cooling system 600 includes the first fluid circuit 410, the second fluid circuit 420, and the controller 430, and the cooling system 600 further includes a refrigerant heat dissipation module 610 and a third fluid circuit 620. The third fluid circuit 620 is used for heat exchange with the first fluid circuit 410 when it is turned on, and the refrigerant heat dissipation module 610 is used for heat exchange with the third fluid circuit 620. Among them, the heat exchange between the refrigerant heat dissipation module 610 and the third fluid circuit 620 cools the third fluid circuit 620, and the cooled third fluid circuit 620 further cools the first fluid circuit 410.

[0076] The controller 430 is used to select to turn on the second fluid circuit 420 or turn on the third fluid circuit 620 and the refrigerant heat dissipation module 610 based on the outdoor temperature. In one example, the controller 430 selects to turn on the second fluid circuit 420 when the outdoor temperature is low. The controller 430 turns on the third fluid circuit 620 when the outdoor temperature is high. When the controller 430 selects to turn on the third fluid circuit 620, the refrigerant heat dissipation module 610 is also turned on. The cold generated when the refrigerant heat dissipation module 610 operates can absorb the heat of the fluid flowing through the third fluid circuit 620.

[0077] Specifically, the third fluid circuit 620 may include a second outdoor heat exchange channel 621, which is used for heat exchange with the refrigerant heat dissipation module 610 so that the fluid in the third fluid circuit 620 is cooled when passing through the second outdoor heat exchange channel 621.

[0078] The cooling system 600 may further include a second air heat dissipation module 640, which is coupled to the refrigerant heat dissipation module 610. The refrigerant heat dissipation module 610 generates heat when it operates. The second air heat dissipation module 640 is used to dissipate heat from the refrigerant heat dissipation module 610 to ensure the normal operation of the refrigerant heat dissipation module 610.

[0079] The refrigerant heat dissipation module 610 includes a refrigerant circuit 650, which is used for circulating refrigerant. The refrigerant may include, for example, Freon gas or liquid. Specifically, the refrigerant heat dissipation module 610 includes a condenser 613 and an evaporator 611. The condenser 613 is used to condense the high-pressure refrigerant gas in the refrigerant circuit, and heat is generated during the condensation process. The second air heat dissipation module 640 may be coupled to the condenser 613 of the refrigerant heat dissipation module 610 to dissipate heat from the refrigerant heat dissipation module 610 by absorbing the heat generated by condensation.

[0080] When the refrigerant heat dissipation module 610 operates, it generates cooling capacity for cooling the third fluid circuit 620. The fluid in the third fluid circuit 620 receives this cooling capacity generated by the refrigerant heat dissipation module 610 when flowing through the second outdoor heat exchange channel 621, so as to be cooled. The cooled fluid then flows through the indoor heat exchange channel 422 to cool the fluid in the first fluid circuit 410 heated by the heat load. The cooled fluid in the first fluid circuit 410 circulates back to the heat load to cool the heat load again, and so on.

[0081] In an embodiment of the present invention, the second outdoor heat exchange channel 621 of the third fluid circuit 620 is used for heat exchange with the evaporator 611 of the refrigerant heat dissipation module 610. The evaporator 611 can evaporate the refrigerant liquid in the refrigerant circuit into a gas, and the evaporation process absorbs heat, so this cooling capacity is generated.

[0082] Those skilled in the art also understand that the refrigerant heat dissipation module 610 may further include a compressor 612 and an expansion valve 614. The compressor 612, condenser 613, expansion valve 614 and evaporator 611 are connected in sequence to form the refrigerant circuit 650. The compressor 612 is used to compress the refrigerant in the refrigerant circuit into a high-pressure gas. The high-pressure gas flows to the condenser 613 for condensation. The condensed refrigerant liquid flows to the expansion valve 614 to be depressurized. The refrigerant after cooling and depressurization is evaporated into a gas in the evaporator 611. The gas generated by evaporation is circulated to the compressor 612 for compression. And so on.

[0083] The second fluid circuit 420 and the third fluid circuit 620 can share some pipelines, so as to save resource allocation and facilitate the renovation of existing pipelines. For example, the second fluid circuit 420 and the third fluid circuit 620 can at least share the indoor heat exchange channel 422 for heat exchange with the first fluid circuit 410. For the sake of easy understanding, Figure 6 the part shared by the third fluid circuit 620 and the second fluid circuit 420 in the figure is represented by a dotted line.

[0084] The controller 430 can select to open the second fluid circuit 420 or the third fluid circuit 620 based on operating the switching valve 630, which is connected, for example, between the first outdoor heat exchange passage 421 and the second outdoor heat exchange passage 621. Specifically, the switching valve 630 includes a first end 631, a second end 632, and a third end 633. The first end 631 of the switching valve 630 communicates with the indoor heat exchange passage 422, the second end 632 communicates with the first outdoor heat exchange passage 421 of the second fluid circuit 420, and the third end 633 communicates with the second outdoor heat exchange passage 621 of the third fluid circuit 620. The controller 430 is configured to control the first end 631 of the switching valve 630 to communicate with the second end 632 or the third end 633. When the first end 631 and the second end 632 are in communication, the second fluid circuit 420 is opened. When the first end 631 communicates with the third end 633, the third fluid circuit 620 is opened.

[0085] In other embodiments, the second fluid circuit 420 and the third fluid circuit 620 can be completely independent, where the second fluid circuit 420 and the third fluid circuit 620 can respectively perform heat exchange on different parts of the first fluid circuit. When the second fluid circuit 420 and the third fluid circuit 620 are independent of each other, they can each have their own switching valve to control the opening and closing of the corresponding circuit.

[0086] In an embodiment of the present invention, the second fluid circuit 420 and the third fluid circuit 620 can share the pump 526 or the water tank 527.

[0087] In the above embodiment, the refrigerant heat dissipation module 610 and the second fluid circuit 420 are respectively and independently coupled to different air heat dissipation modules. For example, the second fluid circuit 420 is coupled to the first air heat dissipation module 440, and the refrigerant heat dissipation module 610 is coupled to the second air heat dissipation module 640. The first outdoor heat exchange passage 421 of the second fluid circuit 420 and the first air heat dissipation module 440 can be provided separately from the refrigerant heat dissipation module 610. In this way, it is convenient to perform pipeline modification on the existing third fluid circuit without modifying the design of the existing refrigerant heat dissipation module. However, in another embodiment described below, the first outdoor heat exchange passage 421 of the second fluid circuit 420 can be coupled to the refrigerant heat dissipation module 610 and share an air heat dissipation module, such as the first air heat dissipation module 440 or the second air heat dissipation module 640.

[0088] Figure 7Fig. 0 shows a cooling system 700 for a magnetic resonance system according to another embodiment of the present invention, which may include some or all components of the above cooling systems 400, 500 or 600. For example, the cooling system 700 includes a first fluid circuit 410, a second fluid circuit 720, a third fluid circuit 620, a refrigerant heat dissipation module 610, and a controller 430. The difference between the second fluid circuit 720 and the second fluid circuit 420 shown in Figure 6 is that the first outdoor heat exchange channel 721 therein is stacked with the condenser 613 of the refrigerant heat dissipation module 610. By this "stacking", the outdoor cold air is guided by a shared air heat dissipation module (such as the first air heat dissipation module 440 or the second air heat dissipation module 640) to pass through the first outdoor heat exchange channel 721 or the condenser 613 of the refrigerant heat dissipation module 610 sequentially or simultaneously, so as to use the outdoor cold air to cool the second fluid circuit 720 and the refrigerant heat dissipation module 610 at the same time.

[0089] For ease of understanding, Figure 6 the refrigerant circuit 650 is represented by a thicker line, and the shared pipeline part of the second fluid circuit 720 and the third fluid circuit 620 is represented by a dashed line.

[0090] The term "stacked" may include being arranged side by side in the up-down extension direction, left-right extension direction or front-back extension direction of the module.

[0091] By stacking the first outdoor heat exchange channel 721 and the condenser 613, space can be saved, and there is no need to separately set an outdoor air heat dissipation module for the second fluid circuit 720, reducing costs.

[0092] Figure 8 Fig. 17 shows the working state of the cooling system 600 when the outdoor temperature is relatively low. Figure 9 Fig. 19 shows the working state of the cooling system 700 when the outdoor temperature is relatively low. Among them, the flow direction of the fluid is shown by an arrow on the fluid path. For ease of description, Figure 8 、 Figure 9 and those to be described below Figure 10 、 Figure 11 the parts of the circuit where the fluid and the refrigerant do not flow are represented by a dashed line. As shown in Figure 8 , when the outdoor temperature is relatively low, for example, less than or equal to 10 degrees Celsius, the controller 430 controls the first end 631 and the second end 632 of the switching valve 630 to be connected, the second fluid circuit 420 is opened, and the third fluid circuit 620 and the refrigerant heat dissipation module 610 are closed. The first air heat dissipation module 440 works, and the second air heat dissipation module 640 does not work. The first outdoor heat exchange channel 421 exchanges heat with the outdoor cold air (guided by the first air heat dissipation module 440 for example) and then the temperature drops, for example, drops to 12 degrees Celsius.

[0093] As Figure 9 shown, when the outdoor temperature is relatively low, for example, less than or equal to 10 degrees Celsius, the controller 430 controls the first end 631 and the third end 633 of the switching valve 630 to communicate, the second fluid circuit 720 is opened, and the third fluid circuit 620 and the refrigerant heat dissipation module 610 are closed. After the first outdoor heat exchange channel 721 exchanges heat with the outdoor cold air (guided by, for example, the first air heat dissipation module 440), the temperature decreases, for example, to 12 degrees Celsius.

[0094] As Figure 8 、 Figure 9 shown, the fluid cooled in the second fluid circuits 420 and 720 absorbs the heat of the first fluid circuit 410 when flowing through the indoor heat exchange channel 422, and the temperature of the fluid in the second fluid circuit 420 increases. The heated fluid (for example, via the flow regulating valve 570) returns to the first outdoor heat exchange channels 421 and 721 to be cooled to a lower temperature again, for example, 12 degrees Celsius, and circulates in this way. After the heat of the first fluid circuit 410 is absorbed in the indoor heat exchange channel 412, the temperature decreases. The low-temperature fluid flows through the heat load, absorbs the heat of the heat load and then flows to the indoor heat exchange channel 412, and is cooled again in the indoor heat exchange channel 412.

[0095] Figure 10 shows the operating state of the cooling system 600 when the outdoor temperature is relatively high. Figure 11 shows the operating state of the cooling system 700 when the outdoor temperature is relatively high. Among them, the flow direction of the fluid is shown by arrows. As Figure 10 shown, when the outdoor temperature is relatively high, for example, higher than 10 degrees Celsius, the controller 430 controls the first end 631 and the third end 633 of the switching valve 630 to communicate, the third fluid circuit 620 is opened, and at the same time the refrigerant heat dissipation module 610 and the second air heat dissipation module 640 are opened, and the second fluid circuit 420 and the first air heat dissipation module 440 are closed. The heat generated during the condensation of the refrigerant in the condenser 613 is taken away via the second air heat dissipation module 640, and the cold generated during the evaporation of the refrigerant in the evaporator 611 cools the fluid in the second outdoor heat exchange channel 621.

[0096] As Figure 11 shown, when the outdoor temperature is relatively high, for example, higher than 10 degrees Celsius, the controller 430 controls the first end 631 and the third end 633 of the switching valve 630 to communicate, the third fluid circuit 620 is opened, and at the same time the refrigerant heat dissipation module 610 and the first air heat dissipation module 440 are opened, and the second fluid circuit 720 is closed. The heat generated during the condensation of the refrigerant in the condenser 613 is taken away via the first air heat dissipation module 440, and the cold generated during the evaporation of the refrigerant in the evaporator 611 cools the fluid in the second outdoor heat exchange channel 621.

[0097] As Figure 10 、 Figure 11 shown, the fluid cooled in the third fluid circuit 620 cools the first fluid circuit 410 when flowing through the indoor heat exchange channel 422. After the fluid in the first fluid circuit 410 absorbs heat in the indoor heat exchange channel 412, its temperature decreases. The low-temperature fluid flows through the heat load, absorbs the heat of the heat load and then flows to the indoor heat exchange channel 412, and is cooled again in the indoor heat exchange channel 412.

[0098] Based on the above embodiments, embodiments of the present invention can provide a cooling system 400, 500, 600, 700 for a magnetic resonance system 100, and the cooling system 400, 500, 600, 700 includes:

[0099] A first fluid circuit 410, the first fluid circuit 410 being coupled to the heat load of the magnetic resonance system 100; and,

[0100] Second fluid circuits 420, 720, which are used to exchange heat with the first fluid circuit 410 when being turned on. The second fluid circuits 420, 720 include first outdoor heat exchange channels 421, 721, and the first outdoor heat exchange channels 421, 721 are coupled with a first air cooling module 440. The first air cooling module 440 is used to guide outdoor air to exchange heat with the first outdoor heat exchange channels 421, 721 to cool the fluid in the second fluid circuit 420.

[0101] Optionally, the cooling system 400, 500, 600, 700 further includes:

[0102] A third fluid circuit 620, which is used to exchange heat with the first fluid circuit 410 when being turned on;

[0103] A refrigerant cooling module 610 for cooling the third fluid circuit 620; and,

[0104] A controller 430, which is used to select to turn on the second fluid circuit 420 or the third fluid circuit 530 and the refrigerant cooling module 610 based on the outdoor temperature.

[0105] Optionally, the third fluid circuit 620 includes a second outdoor heat exchange channel 621, and the second outdoor heat exchange channel 621 is used to exchange heat with the refrigerant cooling module 610.

[0106] Optionally, a switching valve 630 is connected between the second outdoor heat exchange channel 621 and the first outdoor heat exchange channel 521, and the controller 430 selects to open the second fluid circuit 420 or the third fluid circuit 620 by operating the switching valve 630.

[0107] Optionally, the second fluid circuit 420 and the third fluid circuit 620 share an indoor heat exchange channel 422, and the indoor heat exchange channel 422 is used for heat exchange with the first fluid circuit 410. The switching valve 630 includes:

[0108] A first end 631 communicating with the indoor heat exchange channel 422;

[0109] A second end 632 communicating with the first outdoor heat exchange channels 421, 721; and,

[0110] A third end 633 communicating with the second outdoor heat exchange channel 621;

[0111] Wherein, the controller 430 is configured to control the switching valve 630 such that the first end 631 communicates with the second end 632 to open the second fluid circuits 420, 720, or control the first end 631 of the switching valve 630 to communicate with the third end 633 to select to open the third fluid circuit 620.

[0112] Optionally, the first outdoor heat exchange channel 421 and the first air heat dissipation module 440 are coupled to the refrigerant heat dissipation module 610.

[0113] Optionally, the refrigerant heat dissipation module 610 includes a condenser 613, and the first outdoor heat exchange channel 721 of the second fluid circuit 720 is stacked with the condenser 613.

[0114] Optionally, the first outdoor heat exchange channel 421 and the first air heat dissipation module 440 are separately provided from the refrigerant heat dissipation module 610. The cooling systems 400, 500, 600 further include a second air heat dissipation module 640, and the second air heat dissipation module 640 is coupled to the refrigerant heat dissipation module 610.

[0115] Optionally, the second fluid circuits 420, 720 further include a flow rate adjustment module 570 communicating with the first outdoor heat exchange channels 421, 721, and the controller 430 is configured to operate the flow rate adjustment module 570 based on the outdoor temperature to control the amount of fluid flowing through the first outdoor heat exchange channels 421, 721.

[0116] Optionally, the second fluid circuits 420, 720 include an indoor heat exchange passage 422 for heat exchange with the first fluid circuit 410.

[0117] The flow rate adjustment module 570 is a fluid mixing valve, and the fluid mixing valve includes:

[0118] A first end 571 communicating with the indoor heat exchange passage 422;

[0119] A second end 572 communicating with the fluid inlet of the first outdoor heat exchange passage 421; and,

[0120] A third end 573 communicating with the fluid outlet of the first outdoor heat exchange passage 421.

[0121] Optionally, the refrigerant heat dissipation module 610 includes an evaporator 611, and the second outdoor heat exchange passage 621 of the third fluid circuit 620 is used for heat exchange with the evaporator 611.

[0122] Optionally, the cooling systems 400, 500, 600, 700 further include an outdoor temperature detection unit 560 for sending the detected outdoor temperature to the controller 430.

[0123] Optionally, the first air heat dissipation module 440 includes a fan.

[0124] Optionally, when the outdoor temperature is lower than or equal to a specific temperature, the controller 430 turns on the second fluid circuits 420, 720; when the outdoor temperature is higher than the specific temperature, the controller 430 turns on the third fluid circuit 620.

[0125] An embodiment of the present invention can also provide another cooling system 400, 500, 600, 700 for a magnetic resonance system, wherein the controller 430 is configured to turn on the second fluid circuit 420 within a first preset time period and turn off the second fluid circuit 420 within a second preset time period.

[0126] An embodiment of the present invention can also provide a magnetic resonance system 100 including a heat load and the cooling system 400, 500, 600 or 700 for the magnetic resonance system 100 according to any one of the above embodiments.

[0127] Except for any previously indicated modifications, many other variations and alternative arrangements can be designed by those skilled in the art without departing from the spirit and scope of this description, and the appended claims are intended to cover such modifications and arrangements. Accordingly, although the information has been specifically and detailedly described above in connection with what is currently considered to be the most practical and preferred aspects, it will be apparent to those of ordinary skill in the art that many modifications can be made without departing from the principles and concepts set forth herein, including but not limited to form, function, mode of operation, and use. Similarly, as used herein in all respects, the examples and embodiments are intended to be illustrative only and should not be construed in any way as restrictive.

[0128] The purpose of providing the above specific embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive, but the present utility model is not limited to these specific embodiments. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present utility model, and as long as these transformations do not violate the spirit of the present utility model, they should be within the protection scope of the present utility model.

Claims

1. A cooling system for a magnetic resonance system, characterized in that, Comprising: A first fluid circuit coupled to the heat load of the magnetic resonance system; And, A second fluid circuit for exchanging heat with the first fluid circuit when activated, the second fluid circuit including a first outdoor heat exchange channel coupled with a first air cooling module for guiding outdoor air to exchange heat with the first outdoor heat exchange channel to cool the fluid in the second fluid circuit.

2. The cooling system for a magnetic resonance system according to claim 1, characterized in that, Further comprising: A third fluid circuit for exchanging heat with the first fluid circuit when activated; A refrigerant cooling module for cooling the third fluid circuit; And, A controller for selectively activating the second fluid circuit or the third fluid circuit and the refrigerant cooling module based on the outdoor temperature.

3. The cooling system for a magnetic resonance system according to claim 2, characterized in that, The third fluid circuit includes a second outdoor heat exchange channel for exchanging heat with the refrigerant cooling module.

4. The cooling system for a magnetic resonance system according to claim 3, characterized in that, A switching valve is connected between the second outdoor heat exchange channel and the first outdoor heat exchange channel, and the controller selects to activate the second fluid circuit or the third fluid circuit by operating the switching valve.

5. The cooling system for a magnetic resonance system according to claim 4, characterized in that, The second fluid circuit and the third fluid circuit share an indoor heat exchange channel for exchanging heat with the first fluid circuit. The switching valve includes: A first end communicating with the indoor heat exchange channel; A second end communicating with the first outdoor heat exchange channel; and, A third end communicating with the second outdoor heat exchange channel; Wherein, the controller is configured to control the first end of the switching valve to communicate with the second end to activate the second fluid circuit, or control the first end of the switching valve to communicate with the third end to select and activate the third fluid circuit.

6. The cooling system for a magnetic resonance system according to claim 3, characterized in that, The first outdoor heat exchange channel and the first air cooling module are coupled to the refrigerant cooling module.

7. The cooling system for a magnetic resonance system according to claim 6, characterized in that, The refrigerant cooling module includes a condenser, and the first outdoor heat exchange channel of the second fluid circuit is stacked with the condenser.

8. The cooling system for a magnetic resonance system according to claim 3, characterized in that, The first outdoor heat exchange channel and the first air cooling module are separately arranged from the refrigerant cooling module, and the cooling system further includes a second air cooling module coupled to the refrigerant cooling module.

9. The cooling system for a magnetic resonance system according to claim 3, characterized in that, The second fluid circuit further includes a flow rate regulating module communicating with the first outdoor heat exchange channel, and the controller is configured to operate the flow rate regulating module based on the outdoor temperature to control the amount of fluid flowing through the first outdoor heat exchange channel.

10. The cooling system for a magnetic resonance system according to claim 9, wherein: The second fluid circuit includes an indoor heat exchange channel for exchanging heat with the first fluid circuit; The flow rate regulating module is a fluid mixing valve, and the fluid mixing valve includes: A first end communicating with the indoor heat exchange channel; A second end communicating with the fluid inlet of the first outdoor heat exchange channel; and, A third end communicating with the fluid outlet of the first outdoor heat exchange channel.

11. The cooling system for a magnetic resonance system according to claim 3, characterized in that, The refrigerant heat dissipation module includes an evaporator, and the second outdoor heat exchange channel of the third fluid circuit is used for heat exchange with the evaporator.

12. The cooling system for a magnetic resonance system according to claim 2, characterized in that, It further includes an outdoor temperature detection unit, and the outdoor temperature detection unit is used to send the detected outdoor temperature to the controller.

13. The cooling system for a magnetic resonance system according to claim 2, characterized in that, The first air heat dissipation module includes a fan.

14. The cooling system for a magnetic resonance system according to any one of claims 2 to 13, characterized in that, When the outdoor temperature is lower than or equal to a specific temperature, the controller turns on the second fluid circuit; when the outdoor temperature is higher than the specific temperature, the controller turns on the third fluid circuit.

15. A cooling system for a magnetic resonance system, characterized in that, Comprising: A first fluid circuit, the first fluid circuit being coupled to the heat load of the magnetic resonance system; A second fluid circuit, the second fluid circuit being used for heat exchange with the first fluid circuit when turned on, the second fluid circuit including a first outdoor heat exchange channel, the first outdoor heat exchange channel being coupled with a first air heat dissipation module, the first air heat dissipation module being used to guide outdoor air to perform heat exchange with the first outdoor heat exchange channel to cool the fluid in the second fluid circuit; And, A controller, the controller being used to turn on the second fluid circuit within a first preset time period and turn off the second fluid circuit within a second preset time period.

16. A magnetic resonance system, characterized in that, Comprising: A heat load; And, A cooling system for a magnetic resonance system according to any one of claims 1 to 15.

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