阅读说明：本技术 磁共振设备的冷却系统及磁共振设备 (Cooling system of magnetic resonance equipment and magnetic resonance equipment ) 是由 薛廷强 陈平 于 2019-01-31 设计创作，主要内容包括：磁共振设备的冷却系统,其包括用于与磁共振设备的发热元件进行热交换的第二冷却回路(200)和用于与第二冷却回路进行热交换的第一冷却回路(100)。冷却系统还包括第一冷却装置(20)及第二冷却装置(30)。第一冷却装置包括第一冷却箱(21)及换热管(23)。第一冷却装置内填充有第一相变蓄热体(70)。第二冷却装置包括第二冷却箱(31)、二次循环流体管(33)及一次循环流体管(36)。第二冷却箱内填充有第二相变蓄热体(80)。该冷却系统通过第一冷却装置及第二冷却装置实现了对循环流体的非耗能方式的二次阶梯降温,藉此降低了该冷却系统的工作耗能。此外,还提供了包括该冷却系统的磁共振设备。(A cooling system of a magnetic resonance apparatus comprises a second cooling circuit (200) for exchanging heat with a heat generating element of the magnetic resonance apparatus and a first cooling circuit (100) for exchanging heat with the second cooling circuit. The cooling system further comprises a first cooling device (20) and a second cooling device (30). The first cooling device comprises a first cooling box (21) and a heat exchange pipe (23). The first cooling device is filled with a first phase change heat accumulator (70). The second cooling device comprises a second cooling box (31), a secondary circulating fluid pipe (33) and a primary circulating fluid pipe (36). The second cooling tank is filled with a second phase change heat accumulator (80). The cooling system realizes secondary stepped cooling of the circulating fluid in a non-energy-consumption mode through the first cooling device and the second cooling device, so that the working energy consumption of the cooling system is reduced. Furthermore, a magnetic resonance apparatus comprising the cooling system is provided.)

1. Cooling system for a magnetic resonance apparatus, comprising a second cooling circuit (200) for heat exchange with a heat generating element (50) of the magnetic resonance apparatus and a first cooling circuit (100) for heat exchange with the second cooling circuit (200), characterized in that the cooling system comprises:

a first cooling device (20) comprising:

a first cooling tank (21) filled with a first phase-change heat accumulator (70), and

a heat exchange pipe (23) passing through the first cooling tank (21) and contacting the first phase change heat accumulator (70), the heat exchange pipe (23) communicating with the second cooling circuit (200), and

a second cooling device (30) comprising:

a second cooling tank (31) filled with a second phase change heat storage body (80),

a secondary circulation fluid pipe (33) passing through the second cooling tank (31) and contacting the second phase change heat accumulator (80), the secondary circulation fluid pipe (33) communicating with the second cooling circuit (200), the phase change temperature of the second phase change heat accumulator (80) being lower than the phase change temperature of the first phase change heat accumulator (70), and

a primary circulation fluid pipe (36) passing through the second cooling tank (31) and contacting the second phase change heat accumulator (80), the primary circulation fluid pipe (36) being communicated with the first cooling circuit (100).

2. The cooling system according to claim 1, wherein the primary circulation fluid pipe (36) and the secondary circulation fluid pipe (33) are thermally conductive by contact of a heat conductive member.

3. A cooling system according to claim 1, wherein the portion of the heat exchange tubes (23) located inside the first cooling tank (21) extends circuitously, and/or the portion of the secondary circulation fluid tubes (33) located inside the second cooling tank (31) extends circuitously, and/or the portion of the primary circulation fluid tubes (36) located inside the second cooling tank (31) extends circuitously.

4. A cooling system according to claim 1, wherein the portion of the heat exchange tubes (23) located in the first cooling tank (21) forms a plurality of fins (26), and/or the portion of the secondary circulation fluid tubes (33) located in the second cooling tank (31) forms a plurality of fins (26), and/or the portion of the primary circulation fluid tubes (36) located in the second cooling tank (31) forms a plurality of fins (39).

5. The cooling system of claim 1, wherein said cooling system further comprises a compression refrigeration unit (40), said compression refrigeration unit (40) being in communication with said first cooling circuit (100).

6. The cooling system of claim 1, wherein the first phase change heat accumulator (70) and the second phase change heat accumulator (80) comprise phase change materials, the phase change temperature of the phase change material of the first phase change heat accumulator (70) being 19 ℃ to 22 ℃ or 23 ℃ to 25 ℃; the phase change temperature of the phase change material of the second phase change heat accumulator (80) is 6 ℃ to 9 ℃ or 10 ℃ to 12 ℃.

7. The cooling system of claim 6, wherein the phase change material of the first phase change heat accumulator (70) is paraffin, methyl palmitate or stearate; the phase change material of the second phase change heat accumulator (80) contains NH₄Eutectic salt Na of Cl and KCl₂SO₄-10H₂O, a mixture of water capric acid and lauric acid or paraffin oil; the mass ratio of the water capric acid to the lauric acid in the mixture of the water capric acid and the lauric acid is 65:35, and the mixture contains 10% of methyl salicylic acid.

8. The cooling system of claim 6, wherein the phase change material of the first phase change heat accumulator (70) or the second phase change heat accumulator (80) is intermixed with a filler; the filler comprises alumina powder, graphite powder and/or aluminum nitride powder.

9. A magnetic resonance apparatus, characterized by comprising:

a heating element (50); and

a cooling system according to any one of claims 1-8, said second cooling circuit (200) being capable of heat exchange with said heat generating element (50).

10. The magnetic resonance apparatus as set forth in claim 9, wherein the heat generating element (50) is a magnet cold head compressor, a gradient coil, a gradient power amplifier, or a radio frequency power amplifier.

Technical Field

The present invention relates to a cooling system for a magnetic resonance apparatus, and more particularly to a cooling system for saving energy and a magnetic resonance apparatus including the same.

Background

The magnetic resonance equipment has various heating elements, such as a magnet cold head compressor, a gradient coil and the like. In use, the heating elements need to be cooled in order to operate at a temperature at which the electrical properties are stable. In view of the above situation, a fixed-frequency or variable-frequency refrigeration system is mostly adopted to implement cooling, but the operation process of the magnetic resonance equipment is in a discontinuous mode, so that the required power is high during short-term operation, the energy consumption is high, the heat productivity is high, and the energy consumption of the system in a non-working state is low, and the heat productivity is low.

Disclosure of Invention

The invention aims to provide a cooling system of a magnetic resonance device, which can effectively reduce the requirement on the required cooling system and can realize stable and quick cooling.

Another object of the present invention is to provide a magnetic resonance apparatus, the cooling system of which can effectively reduce the operation energy consumption of the cooling system and can realize smooth and rapid cooling.

The invention provides a cooling system of a magnetic resonance device, which comprises a second cooling circuit used for exchanging heat with a heating element of the magnetic resonance device and a first cooling circuit used for exchanging heat with the second cooling circuit. The cooling system comprises a first cooling device and a second cooling device. The first cooling device comprises a first cooling box and a heat exchange pipe. The first cooling tank is filled with a first phase change heat accumulator. The heat exchange tube penetrates through the first cooling box and contacts the first phase-change heat accumulator. The heat exchange tube is communicated with the second cooling loop. The second cooling device comprises a second cooling box, a secondary circulating fluid pipe and a primary circulating fluid pipe. And a second phase change heat accumulator is filled in the second cooling tank. And the secondary circulating fluid pipe is arranged in the second cooling tank in a penetrating way and is in contact with the second phase change heat accumulator. The secondary circulating fluid pipe is communicated with the second cooling loop. The phase change temperature of the second phase change heat accumulator is lower than the phase change temperature of the first phase change heat accumulator. And the primary circulating fluid pipe is arranged in the second cooling tank in a penetrating way and is in contact with the second phase change heat accumulator. The primary circulating fluid pipe is communicated with the first cooling circuit.

This cooling system has realized the secondary ladder cooling to the non-power consumption mode of circulating fluid through first cooling device and second cooling device, has reduced this cooling system's work power consumption by this, has reduced the operation cost and has guaranteed steady, rapid cooling simultaneously.

In another exemplary embodiment of the cooling system, the primary circulation fluid pipe and the secondary circulation fluid pipe are in contact heat transfer via a heat transfer member.

In a further exemplary embodiment of the cooling system, the portion of the heat exchange tubes located in the first cooling tank extends circuitously, and/or the portion of the secondary circulation fluid tubes located in the second cooling tank extends circuitously, and/or the portion of the primary circulation fluid tubes located in the second cooling tank extends circuitously. So that the heat exchange tube, the secondary circulation fluid tube and/or the primary circulation fluid tube are/is in more sufficient contact with the phase change heat accumulator, and the refrigeration efficiency is improved.

In still another exemplary embodiment of the cooling system, a portion of the heat exchange tubes located in the first cooling tank forms a plurality of fins, and/or a portion of the secondary circulation fluid tubes located in the second cooling tank forms a plurality of fins, and/or a portion of the primary circulation fluid tubes located in the second cooling tank forms a plurality of fins. The heat exchange area of the heat exchange tube, the secondary circulation fluid tube and/or the primary circulation fluid tube can be increased, and the refrigeration efficiency is improved.

In yet another exemplary embodiment of the cooling system, the cooling system further comprises a compression refrigeration unit. The compression refrigeration unit is in communication with the first cooling circuit. To produce the cooling fluid in the primary circulating fluid tube.

In yet another illustrative embodiment of the cooling system, the first phase change heat accumulator and the second phase change heat accumulator are comprised of a phase change material. The phase change temperature of the first phase change heat accumulator is 19 ℃ to 22 ℃ or 23 ℃ to 25 ℃. The phase change temperature of the second phase change heat accumulator is 6 ℃ to 9 ℃ or 10 ℃ to 12 ℃. In order to facilitate cooling of the magnetic resonance apparatus during operation. Meanwhile, the temperature fluctuation of the magnetic resonance equipment during operation can be effectively relieved.

In yet another illustrative embodiment of the cooling system, the phase change material of the first phase change heat accumulator is paraffin, methyl palmitate, or stearate. The phase-change material of the second phase-change heat accumulator is NH-containing₄Eutectic salt Na of Cl and KCl₂SO₄-10H₂O, a mixture of water capric acid and lauric acid or paraffin oil, wherein the mass ratio of the water capric acid to the lauric acid in the mixture of the water capric acid and the lauric acid is 65:35, and the mixture contains 10% of methyl salicylic acid. The cost is low.

In yet another illustrative embodiment of the cooling system, the phase change material of the first or second phase change heat accumulator is intermixed with a filler; the filler comprises alumina powder, graphite powder and/or aluminum nitride powder.

The invention also provides a magnetic resonance device which comprises a heating element and the cooling system. The second cooling circuit is capable of exchanging heat with the heat generating element. This cooling system has realized the secondary ladder cooling to the non-power consumption mode of circulating fluid through first cooling device and second cooling device, has reduced this cooling system's work power consumption by this, has reduced the operation cost and has guaranteed steady, rapid cooling simultaneously.

In a further exemplary embodiment of the magnetic resonance system, the heating element is a magnet cold head compressor, a gradient coil, a gradient power amplifier or a radio frequency power amplifier. Therefore, the cooling device can be suitable for cooling the main parts of the magnetic resonance equipment.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic diagram of the composition of an exemplary embodiment of a cooling system of a magnetic resonance system.

Fig. 2 is a partial sectional view of the first cooling device shown in fig. 1.

Fig. 3 is a view for explaining the structure of the fin shown in fig. 2.

Fig. 4 is a schematic diagram of the composition of another exemplary embodiment of a cooling system of a magnetic resonance apparatus.

Description of the reference symbols

10 heat sink

11 fluid channel

12 channel outlet

13 channel entrance

20 first cooling device

21 first cooling tank

22 first heat exchange chamber

23 Heat exchange tube

24 pipe inlet

25 pipe outlet

26, 39 fin

30 second cooling device

31 second cooling tank

32 second heat exchange chamber

33 secondary circulation fluid pipe

34 pipe inlet of secondary circulation fluid pipe

35 pipeline outlet of secondary circulating fluid pipe

36 primary circulation fluid pipe

37 refrigerant pipeline interface

38 refrigerant pipeline interface

40 compression refrigerating device

41. 42 cooling cycle end

50 heating element

60 driving pump

70 first phase change heat accumulator

80 second phase change thermal mass

100 first cooling circuit

200 second cooling circuit

Detailed Description

In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

In this document, "first", "second", etc. do not mean their importance or order, etc., but merely mean that they are distinguished from each other so as to facilitate the description of the document.

Fig. 1 is a schematic diagram of the composition of an exemplary embodiment of a cooling system of a magnetic resonance system. The magnetic resonance apparatus includes a heating element 50. As shown in fig. 1, the cooling system includes a second cooling circuit 200 for exchanging heat with the heat generating element 50 of the magnetic resonance apparatus and a first cooling circuit 100 for exchanging heat with the second cooling circuit 200. The cooling system further comprises a first cooling device 20 and a second cooling device 30. Wherein a heat sink 10 is arranged in the second cooling circuit 200 for heat exchange with a heat generating element 50 of the magnetic resonance apparatus. The heat sink 10 has a fluid channel 11. The fluid channel 11 has a channel inlet 13 and a channel outlet 12. The heat sink 10 is for exchanging heat with the heat generating element 50 and transferring the heat to the fluid contained in the fluid passage 11.

The heat sink 10 is disposed adjacent to the heating element 50 to perform sufficient heat exchange with the heating element 50. The heat sink 10 and the heat generating element 50 may be designed as an integral structure. For example, when the heating element 50 is a gradient coil, the heat sink 10 can be designed to be disposed around the lead of the gradient coil, such that the fluid channel 11 surrounds the periphery of the lead, thereby achieving a better cooling effect.

The first cooling device 20 includes a first cooling tank 21 and a heat exchange pipe 23. The first cooling tank 21 is filled with a first phase change heat accumulator 70. In particular a first heat exchange chamber 22 in the first cooling tank 21. The first phase change heat accumulator 70 is disposed in the first heat exchange chamber 22. The heat exchange pipe 23 penetrates through the first cooling tank 21, and the part of the heat exchange pipe 23 located in the first heat exchange cavity 22 contacts the first phase-change heat accumulator 70. The tube inlet 24 of the heat exchange tube 23 communicates with the channel outlet 12 of the fluid channel 11. So that the heat exchange pipe communicates with the second cooling circuit 200.

The second cooling device 30 includes a second cooling tank 31, a secondary circulation fluid pipe 33, and a primary circulation fluid pipe 36. The second cooling tank 31 is filled with a second phase change heat storage body 80. In particular a second heat exchange chamber 32 in the second cooling tank 31. A second phase change thermal mass 80 is disposed in second heat exchange chamber 32. The secondary circulation fluid pipe 33 is disposed through the second cooling tank 31, and a portion of the secondary circulation fluid pipe 33 located in the second heat exchange chamber 32 contacts the second phase change heat accumulator 80. The pipe inlet 34 of the secondary circulation fluid pipe 33 communicates with the pipe outlet 25 of the heat exchange pipe 23, and the pipe outlet 35 of the secondary circulation fluid pipe 33 communicates with the channel inlet 13 of the fluid channel 11. The phase change temperature of the second phase change heat accumulator 80 is lower than the phase change temperature of the first phase change heat accumulator 70.

The primary circulation fluid pipe 36 is arranged through the second cooling tank 31, and the part of the primary circulation fluid pipe 36 positioned in the second heat exchange cavity 32 contacts the second phase change heat accumulator 80. A primary circulation fluid line 36 communicates with the first cooling circuit 100. But not limited thereto, in other exemplary embodiments, the primary circulation fluid pipe 36 may have one refrigerant pipe connection 37, 38 at each end. The refrigerant pipe joints 37 and 38 are used for connecting with a cold source.

The first phase-change heat storage body 70 and the second phase-change heat storage body 80 have high latent heat and are made of, for example, a phase-change material. The heat dissipated from the heat exchange tubes 23 will raise the temperature of the first phase change heat storage body 70 to the phase change temperature through contact heat conduction and cause a phase change. The heat dissipated in the secondary loop fluid tube 33 will increase the temperature of the second phase change heat storage body 80 to the phase change temperature and cause a phase change by contact conduction. The first phase-change heat accumulator 70 and the second phase-change heat accumulator 80 are maintained at the phase-change temperature while absorbing a large amount of heat during this phase change. The primary circulation fluid line 36 absorbs heat dissipated by the second phase change heat storage body 80 and the secondary circulation fluid line 33 through contact conduction.

In the present exemplary embodiment, the cooling system further includes a drive pump 60 that connects the tube outlet 25 of the heat exchange tube 23 and the tube inlet 34 of the secondary circulation fluid tube 33 to effect a circulating flow of the fluid in the tube. Without limitation, in other exemplary embodiments, other fluid-driven devices may also be disposed in the conduit.

In use of the cooling system, the heat sink 10 absorbs heat generated by the heat generating element 50 and transfers the heat to the fluid contained in the fluid passageway 11. The driving pump 60 drives the fluid to flow, so that the fluid having absorbed heat in the fluid channel 11 reaches the heat exchange pipe 23 of the first cooling device 20. The heat exchange tube 23 exchanges heat with the first phase-change heat accumulator 70, whereby the heat of the fluid in the heat exchange tube 23 is transferred to the first phase-change heat accumulator 70 and is cooled down by itself. The fluid with the temperature reduced in the heat exchange pipe 23 enters the secondary circulation fluid pipe 33 of the second cooling device 30 under the driving of the driving pump 60, and the secondary circulation fluid pipe 33 exchanges heat with the second phase change heat accumulator 80, so that the heat of the fluid in the secondary circulation fluid pipe 33 is transferred to the second phase change heat accumulator 80 and the temperature of the fluid is reduced. The fluid cooled by the second cooling device 30 returns to the fluid passage 11 to absorb heat again. By so circulating, the cooling of the heating element 50 in the magnetic resonance apparatus is realized. After the refrigerant pipe joints 37 and 38 of the second cooling device 30 are connected to the cold source, the second phase change heat accumulator 80 and the secondary circulation fluid pipe 33 may be cooled indirectly or directly by the primary circulation fluid pipe 36, so as to improve the cooling capacity of the second cooling device 30.

This cooling system has realized the secondary ladder cooling to the non-power consumption mode of circulating fluid through first cooling device 20 and second cooling device 30, has reduced this cooling system's work power consumption by this, has reduced the operation cost and has guaranteed steady, rapid cooling simultaneously.

In the present exemplary embodiment, the first phase-change heat accumulator 70 and the second phase-change heat accumulator 80 are made of a phase-change material. In other exemplary embodiments, the phase change material is intermixed with fillers such as metals and composites thereof, alumina powder, graphite powder, and/or aluminum nitride powder, whereby thermal conductivity can be enhanced. Without limitation, in other exemplary embodiments, the phase change material may also be present in the form of adsorbed onto the thermally conductive porous ceramic, adsorbed onto expanded graphite, or adsorbed onto aluminum foam, which may also increase thermal conductivity.

In the present exemplary embodiment, the phase change material of the first phase change heat accumulator 70 is paraffin, methyl palmitate, or stearate. The phase change material of the second phase change heat accumulator 80 is NH-containing₄Eutectic salt Na of Cl and KCl₂SO₄-10H₂O, etc., mixtures of aqueous capric acid and lauric acid or paraffin oil; the mass ratio of the water capric acid to the lauric acid in the mixture of the water capric acid and the lauric acid is 65:35, and the mixture contains 10% of methyl salicylic acid. Thereby reducing the cost. The phase change temperature of the first phase change heat accumulator 70 is 19 to 22 ℃ or 23 to 25 ℃. The phase change temperature of the second phase change heat accumulator 80 is 6 ℃ to 9 ℃ or 10 ℃ to 12 ℃. The phase transition temperature of the phase transition material is a temperature interval which is preferably selected in the using and operating process of the magnetic resonance equipment. In the temperature interval, the magnetic resonance equipment can be effectively cooled and more energy can be saved. Thereby storing heat through phase change at a lower temperature. Without limitation, in other exemplary embodiments, the type and phase of the phase change materialThe variable temperature can be adjusted as required.

In the present exemplary embodiment, the cooling system is provided with only one heat sink 10, one first cooling device 20, and one second cooling device 30, but is not limited thereto, and in other exemplary embodiments, the number of the heat sinks 10, the first cooling devices 20, and the second cooling devices 30 may also be adjusted as needed, which are arranged along one circulation line.

As shown in fig. 1, in the present exemplary embodiment, the portion of the heat exchange tube 23 located in the first heat exchange chamber 22 extends circuitously. This structure increases the heat exchange tube length of the heat exchange tube 23 and increases the heat exchange contact area of the tube. When the fluid is caused to flow through the heat exchange tube 23, sufficient heat exchange with the first phase change heat storage body 70 may be performed through the tube wall of the heat exchange tube 23. Similarly, the portions of the secondary circulation fluid pipe 33 and the primary circulation fluid pipe 36 located in the second heat exchange chamber 32 also extend circuitously. In other exemplary embodiments, the heat exchange pipe 23, the secondary circulation fluid pipe 33, and the primary circulation fluid pipe 36 may be shaped as desired, for example, in a straight line type.

Fig. 2 is a partial sectional view of the first cooling device 20 shown in fig. 1. As shown in fig. 2, in the present exemplary embodiment, the portions of the heat exchange tubes 23 located inside the first cooling tank 21 are formed with a plurality of fins 26, specifically, the surfaces of the heat exchange tubes 23 facing the first heat exchange chamber 22 are formed with a plurality of fins 26. The fins 26 are, for example, arranged sequentially and uniformly along the surface of the heat exchange tube 23. The heat of the fluid in the heat exchange tubes 23 is conducted to the first phase change heat accumulator 70 through the fins 26. The contact area of the first phase-change heat accumulator 70 is increased through the fins 26, and the cooling speed and the heat exchange efficiency are improved. Similarly, the secondary circulation fluid pipe and/or the primary circulation fluid pipe 36 are located in the second cooling tank 31, and a plurality of fins 39 are formed, specifically, a plurality of fins may also be formed on the surfaces of the secondary circulation fluid pipe 33 and the primary circulation fluid pipe 36 facing the second heat exchange cavity 32, so as to increase the contact area with the second phase-change heat accumulator 80, and improve the cooling speed and the heat exchange efficiency.

Fig. 3 is a view for explaining the structure of the fin shown in fig. 2. As shown in fig. 3, each fin 26 is disposed around the tubes of the heat exchange tube 23 to increase the heat exchange area.

In the illustrated embodiment, the primary circulation fluid pipe 36 and the secondary circulation fluid pipe 33 are thermally conductive by contact through a thermally conductive member. The heat conducting member may be a heat conducting plate. The heat conduction of the primary circulation fluid pipe 36 and the secondary circulation fluid pipe 33 can be realized by welding on the same heat conducting plate. The heat exchange between the primary circulation fluid pipe 36 and the secondary circulation fluid pipe 33 can also be realized by the heat-conducting plate in a manner that the primary circulation fluid pipe 36 and the secondary circulation fluid pipe 33 are arranged on the same heat-conducting plate in a penetrating manner. However, in other exemplary embodiments, the heat conducting structure may be configured and adjusted as needed. Thereby, the heat transfer efficiency from the secondary circulation fluid pipe 33 to the primary circulation fluid pipe 36 can be improved.

Fig. 4 is a schematic diagram of the composition of another exemplary embodiment of a cooling system of a magnetic resonance apparatus. The same or similar parts of the cooling system of the exemplary embodiment as those of fig. 1 will not be described herein again, except for the following: the cooling system also includes a compression refrigeration unit 40. A cooling cycle end 41 of the compression refrigeration device 40 is communicated with a refrigerant pipeline interface 37 of the second cooling device 30. The other cooling circulation end 42 is communicated with the other refrigerant pipeline interface 38 of the second cooling device 30. A compression refrigeration unit 40 is used to refrigerate the fluid flowing therethrough to produce a cooling fluid in the primary loop fluid tube (36).

In use, the compression refrigeration unit 40 can be turned on or off as desired. That is, the compression refrigeration device 40 is turned off when the first cooling device 20 and the second cooling device 30 can satisfy the refrigeration requirement, and the compression refrigeration device 40 is used for supplementing when the first cooling device 20 and the second cooling device 30 cannot satisfy the refrigeration requirement, so as to meet the cooling requirement. For example: when the magnetic resonance apparatus is in the "scanning" state, the cooling requirement thereof exceeds the cooling capacity of the first cooling device 20 and the second cooling device 30, and a mode in which the compression refrigeration device 40 and the first cooling device 20 and the second cooling device 30 operate simultaneously can be adopted. When the magnetic resonance apparatus is in a state of "shutdown" (scan function off), a mode in which the first cooling device 20 and the second cooling device 30 operate separately may be employed. Thereby increasing the flexibility of the cooling system. Meanwhile, the secondary cooling can also effectively avoid the large fluctuation of the cooling fluid during the cooling, so that the heating element can stably work in a proper temperature interval in various running states of the magnetic resonance equipment, and the imaging quality and the running state of the magnetic resonance equipment are more stable.

The present invention also provides a magnetic resonance apparatus which, in an exemplary embodiment, includes the cooling system and heating element 50 shown in figure 1. The second cooling circuit 200 is capable of exchanging heat with the heat generating element 50 through the heat sink 10 and transferring the heat to the fluid contained in the fluid passage 11. This cooling system has realized the secondary ladder cooling to the non-power consumption mode of circulating fluid through first cooling device 20 and second cooling device 30, has reduced this cooling system's work power consumption by this, has reduced the operation cost and has guaranteed steady, rapid cooling simultaneously.

In the illustrated embodiment, the heat sink 10 is capable of conducting heat in contact with the heat-generating element 50. The contact heat conduction may be direct contact heat conduction or indirect contact heat conduction through a third party, but is not limited thereto. The heating element 50 is, for example, a magnet cold head compressor, a gradient coil, a gradient power amplifier, or a radio frequency power amplifier.

It should be understood that although the description has been described in terms of various embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will recognize that the embodiments described herein may be combined as a whole to form other embodiments as would be understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.