Magnetic refrigeration structure

Abstract

The invention relates to the technical field of refrigeration equipment, and provides a magnetic refrigeration structure which comprises a magnetic field source and an annular magnetic conducting outer frame, the magnetic field source is arranged on the inner side of the magnetic conducting outer frame, the magnetic field source comprises a first magnetic supply set and a second magnetic supply set which are parallel, the first magnetic supply set comprises a plurality of first magnetic blocks, and the second magnetic supply set comprises a plurality of second magnetic blocks. The polarity of the first magnetic block is opposite to that of the second magnetic block, the first magnetic block and the second magnetic block form a working air gap and a plurality of closed magnetic circuits with the magnetic conducting outer frame, the magnetic conducting outer frame is of a specific structure and is provided with a cooling pipe in a penetrating mode, and a connecting plate, a heat-resistant bonding layer, a connecting assembly, an auxiliary cooling assembly and the like are further arranged. According to the invention, the problems of non-uniform magnetic field and easy field loss are solved, and the cooling uniformity and reliability during field loss are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a magnetic refrigeration structure. BACKGROUND

[0002] The nuclear reactor cooling system is a key component to ensure the safe operation of the reactor, and its core task is to effectively remove the heat generated by the reactor through the coolant to maintain the temperature of the reactor core within a safe range. Most nuclear reactor cooling systems mainly rely on mechanical pumps and pipeline systems to achieve the circulating flow of cooling water.

[0003] With the development of magnetic material technology, the application of magnetic refrigeration technology in cooling systems has gradually attracted attention. Magnetic refrigeration technology is based on the principle of magnetic heat effect. When a magnetic heat working medium with magnetic heat effect is placed in a changing magnetic field, the internal magnetic moment will rearrange with the change of the magnetic field strength, resulting in a change in the temperature of the magnetic heat working medium. By controlling the magnetic field strength and the state conversion of the magnetic heat working medium, heat can be effectively absorbed, thereby achieving refrigeration effect. It has application value in high heat load scenarios such as nuclear reactor cooling systems and space temperature control equipment. Compared with traditional mechanical compression refrigeration, magnetic refrigeration has the advantages of zero greenhouse gas emissions, high energy efficiency, low vibration, etc.

[0004] In current magnetic refrigeration technology, the magnetic circuit formed by the permanent magnet structure is a divergent magnetic circuit. The divergent magnetic circuit leads to non-uniform distribution of magnetic field strength in space, and the magnetic field formed is unstable, which is easy to lose magnetism, thereby affecting the uniformity and reliability of the cooling effect. SUMMARY

[0005] In order to solve the problems of non-uniform magnetic field and easy loss of magnetism, the present application provides a magnetic refrigeration structure.

[0006] The present application provides a magnetic refrigeration structure, which adopts the following technical scheme: A magnetic refrigeration structure, comprising a magnetic field source and a ring-shaped magnetic conducting outer frame, the magnetic field source is arranged inside the magnetic conducting outer frame; The magnetic field source comprises a first magnetic supply group and a second magnetic supply group arranged in parallel, the first magnetic supply group comprises a plurality of first magnetic blocks connected in sequence, and the second magnetic supply group comprises a plurality of second magnetic blocks connected in sequence; The first magnetic supply group, the second magnetic supply group and the inner wall of the magnetic conducting outer frame form a working air gap, the polarity of the first magnetic block and the polarity of the second magnetic block are opposite, and the magnetic field source and the magnetic conducting outer frame form a plurality of closed magnetic circuits on the side of the working air gap.

[0007] By adopting the technical scheme, the annular magnetic conductive outer frame and the magnetic field source are arranged, the first magnetic block and the second magnetic block with opposite polarities cooperate with the magnetic conductive outer frame to form a plurality of closed magnetic circuits on the side of the working air gap, the closed magnetic circuits can provide a strong and stable magnetic field, so that the magnetic heat working medium can experience sufficient magnetization and demagnetization processes when moving in the working air gap. Due to the uniform and stable magnetic field, the heat absorption efficiency of the magnetic heat working medium is high, thereby improving the cooling effect of the coolant.

[0008] Optionally, the magnetic conductive outer frame comprises a first magnetic conductive column and a second magnetic conductive column connected with each other, the first magnetic conductive column is oppositely arranged with two, and the second magnetic conductive column is oppositely arranged with two, and the first magnetic conductive column is arranged perpendicularly to the second magnetic conductive column.

[0009] By adopting the technical scheme, the first magnetic conductive column and the second magnetic conductive column arranged perpendicularly and oppositely are connected to form the magnetic conductive outer frame, and the working air gap and the plurality of closed magnetic circuits are formed in combination with the magnetic field source, thereby optimizing the magnetic circuit distribution and making the magnetic field of the working air gap more uniform. When the magnetic heat working medium reciprocally moves in the working air gap, the magnetic field of the whole working air gap region changes uniformly, thereby ensuring the stability of the heat absorption and heat release efficiency of the magnetic heat working medium, and ensuring the uniformity of the cooling of the coolant.

[0010] Optionally, a cooling pipe is arranged to pass through the magnetic conductive outer frame, and a pipe segment portion in the cooling pipe is located in the working air gap; Two connecting plates are arranged in the working air gap at intervals, the connecting plates are connected with the inner side walls of the magnetic conductive outer frame, a pipe clamping hole for accommodating the cooling pipe is arranged on each connecting plate, and a through hole corresponding to the pipe clamping hole is arranged on the magnetic conductive outer frame.

[0011] By adopting the technical scheme, the cooling pipe directly passes through the working air gap, so that the coolant can directly flow through the core area of the magnetic field. When the magnetic heat working medium reciprocally moves in the working air gap and absorbs heat by demagnetization, the coolant in the cooling pipe can be directly and efficiently cooled. The connecting plates fix the cooling pipe in the working air gap, thereby ensuring the stability of the relative position of the cooling pipe and the magnetic heat working medium. In this way, when the magnetic heat working medium reciprocally moves in the working air gap, the cooling pipe is always in the best heat exchange position, so that the coolant can be uniformly cooled. At the same time, the design of the pipe clamping hole and the through hole facilitates installation and maintenance, and also avoids the influence of cooling effect caused by vibration and displacement of the cooling pipe.

[0012] Optionally, a heat-resistant adhesive layer is arranged between two adjacent first magnetic blocks, and a heat-resistant adhesive layer is also arranged between two adjacent second magnetic blocks.

[0013] By adopting the technical scheme, the heat-resistant bonding layer ensures the connection stability of the adjacent first magnetic block and the adjacent second magnetic block in a high-temperature environment, and prevents the magnetic blocks from being separated due to thermal stress. In this way, the magnetic field source can stably generate a magnetic field at high temperature, and ensures that the magnetic working medium experiences stable magnetic field changes in the working air gap.

[0014] Optionally, the magnetically conductive outer frame is further provided with a connecting assembly, the connecting assembly comprising a first connecting bolt, a second connecting bolt, a first reinforcing bolt and a second reinforcing bolt; The first connecting bolt is threadedly connected in the first magnetically conductive column. The first reinforcing bolt is arranged on one side of each first connecting bolt, and a plurality of first reinforcing bolts are arranged on the second magnetically conductive column in a direction perpendicular to the length direction of the second magnetically conductive column, and the first reinforcing bolt is threadedly connected in the first magnetically conductive column. The second connecting bolt is threadedly connected in the first magnetically conductive column or the second magnetically conductive column. The second reinforcing bolt is arranged on the second magnetically conductive column, a plurality of second reinforcing bolts are arranged on the second magnetically conductive column in a direction perpendicular to the length direction of the second magnetically conductive column, and the second reinforcing bolt is threadedly connected in the first magnetically conductive column or the second magnetically conductive column.

[0015] By adopting the above technical scheme, the first connecting bolt and the first reinforcing bolt in the connecting assembly firmly connect the second magnetically conductive column and the first magnetically conductive column, the second connecting bolt and the second reinforcing bolt firmly connect the second magnetically conductive column and the first magnetically conductive column or the second magnetically conductive column, thereby improving the connection stability between the components of the high-temperature-resistant magnetic refrigeration structure, making the structure more firm and reliable, and especially being able to adapt to a high-temperature environment, avoiding the collapse and separation of the components at high temperature.

[0016] Optionally, the auxiliary cooling assembly further comprises an auxiliary cooling main pipe and a driving source. The first cooling cavity is arranged in the first magnetically conductive column, and the first cooling cavity is communicated with a first inlet and a first outlet. The second cooling cavity is arranged in the second magnetically conductive column, and the second cooling cavity is communicated with a second inlet and a second outlet. The first inlet and the second inlet are communicated with the auxiliary cooling main pipe, and the driving source is used to drive the heat exchange medium in the auxiliary cooling main pipe to move towards the first cooling cavity and the second cooling cavity.

[0017] By adopting the technical scheme, the auxiliary cooling assembly can introduce the cold source into the first cooling cavity and the second cooling cavity to actively cool the high-temperature-resistant magnetic refrigeration structure, and prevent the magnetically conductive outer frame from being deformed due to temperature influence. The magnetic circuit can be maintained stable, and the magnetic field in the working air gap is difficult to be distorted.

[0018] Optionally, the first cooling cavity comprises first micro-flow channels and second micro-flow channels communicated between the first inlet and the first outlet, and the first micro-flow channels are arranged close to the magnetic field source. The second cooling cavity comprises third micro-flow channels and fourth micro-flow channels communicated between the second inlet and the second outlet, and the third micro-flow channels are arranged close to the magnetic field source. The number of the first micro-flow channels is greater than that of the second micro-flow channels, and the number of the third micro-flow channels is greater than that of the fourth micro-flow channels.

[0019] By adopting the technical scheme, since the area close to the magnetic field source has a higher temperature in the working state, the number of the first micro-flow channels and the third micro-flow channels is respectively greater than that of the second micro-flow channels and the fourth micro-flow channels, so that the flow of the heat exchange medium close to the magnetic field source is greater, the cooling effect near the magnetic field source is enhanced, and the cooling requirement at high temperature is better met.

[0020] Optionally, each first inlet is communicated with a first auxiliary cooling branch pipe, and each second inlet is communicated with a second auxiliary cooling branch pipe, and the first auxiliary cooling branch pipe and the second auxiliary cooling branch pipe are communicated with the auxiliary cooling main pipe. A first flow control valve is arranged on the first auxiliary cooling branch pipe, and a first temperature detector is arranged at the first outlet, and the first temperature detector is electrically connected with the first flow control valve. A second flow control valve is arranged on the second auxiliary cooling branch pipe, and a second temperature detector is arranged at the second outlet, and the second temperature detector is electrically connected with the second flow control valve.

[0021] By adopting the technical scheme, the first auxiliary cooling branch pipe and the second auxiliary cooling branch pipe are communicated with the auxiliary cooling main pipe to realize the delivery of the heat exchange medium to the first cooling cavity and the second cooling cavity. The first flow control valve and the first temperature detector are electrically connected, and the second flow control valve and the second temperature detector are electrically connected, so that the flow of the heat exchange medium in the first auxiliary cooling branch pipe and the second auxiliary cooling branch pipe can be automatically adjusted according to the temperature at the first outlet and the second outlet, the cooling effect of the first cooling cavity and the second cooling cavity is accurately controlled, the cooling amount is distributed as needed, and the energy consumption is saved.

[0022] Optionally, the cooling pipe comprises an inlet end and an outlet end, and one end of the auxiliary cooling main pipe is communicated with the outlet end of the cooling pipe.

[0023] By adopting the technical scheme, the cooled coolant in the cooling pipe can be branched to the auxiliary cooling main pipe, and the cold energy of the coolant can be utilized to provide a cold source for the first cooling cavity and the second cooling cavity. The auxiliary cooling assembly does not need an additional cold source, and the cold energy of the coolant in the cooling pipe can be utilized to cool the magnetically conductive outer frame.

[0024] Optionally, the auxiliary cooling main pipe is arranged on the magnetically conductive outer frame, and a pipe segment portion in the auxiliary cooling main pipe is located in the working air gap.

[0025] By adopting the technical scheme, the auxiliary cooling main pipe can supply the heat exchange medium, and the portion of the auxiliary cooling main pipe located in the working air gap can also be cooled by the magnetic heat working medium. When the magnetic heat working medium demagnetizes and absorbs heat, the heat exchange medium in the auxiliary cooling main pipe can also be cooled, and the cooled heat exchange medium is supplied to the first cooling cavity and the second cooling cavity.

[0026] In summary, the present application has at least one of the following beneficial effects: 1. The magnetic field source and the annular magnetically conductive outer frame cooperate to form a plurality of closed magnetic circuits on the circumferential side of the working air gap enclosed thereby, which can effectively improve the problems of uneven and unstable magnetic field distribution in the current magnetic refrigeration technology, make the magnetic field distribution more uniform and stable, and thus significantly improve the uniformity and reliability of the cooling effect, meeting the high-quality requirements of the nuclear reactor cooling system and other high-heat-load scenarios on the cooling effect; 2. The magnetic field source and the annular magnetically conductive outer frame are combined by using a high-temperature-resistant adhesive and fixed by bolts, which can solve the problems of poor connectivity, easy collapse and separation of the magnetic refrigeration structure in a high-temperature environment, ensure the structural integrity and stability in a high-temperature environment, prolong the service life of the magnet, and reduce the replacement frequency; 3. Two connecting plates are arranged in the working air gap, the connecting plates are connected to the inner side wall of the magnetically conductive outer frame, each connecting plate is provided with a pipe clamping hole for accommodating the cooling pipe, and the magnetically conductive outer frame is provided with a through hole corresponding to the pipe clamping hole. This structure design can fix and support the cooling pipe, ensure the stability of the cooling pipe during the working process, and make the cooling process more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the magnetic refrigeration structure of Embodiment 1 of the present application; Figure 2 is a schematic diagram of the magnetic circuit distribution structure of the magnetic refrigeration structure of Embodiment 1 of the present application; Figure 3 is a schematic diagram of the overall structure of the magnetic refrigeration structure of Embodiment 2 of the present application; Figure 4 is a schematic diagram of the cross-sectional structure of the magnetic refrigeration structure of Embodiment 2 of the present application; Figure 5 is a schematic diagram of the cross-sectional structure of the first magnetically conductive column in Embodiment 2 of the present application; Figure 6 is a sectional structure schematic view of the second magnetic conducting column in Embodiment 2 of the present application; Figure 7 is a whole structure schematic view of the magnetic refrigeration structure in Embodiment 3 of the present application; Explanation of reference numerals: 1, magnetic field source; 11, first magnetic block; 12, second magnetic block; 2, magnetic conducting outer frame; 21, first magnetic conducting column; 211, first micro flow channel; 212, second micro flow channel; 213, through hole; 214, first inflow chamber; 215, first outflow chamber; 216, flow guiding chamber; 22, second magnetic conducting column; 221, third micro flow channel; 222, fourth micro flow channel; 223, second inflow chamber; 224, second outflow chamber; 3, working air gap; 4, cooling pipe; 41, first flow guiding pipe; 42, second flow guiding pipe; 5, connecting plate; 51, pipe clamping hole; 6, heat-resistant adhesive layer; 7, connecting assembly; 71, first connecting bolt; 72, second connecting bolt; 73, first reinforcing bolt; 74, second reinforcing bolt; 8, auxiliary cooling assembly; 81, auxiliary cooling main pipe; 82, first auxiliary cooling branch pipe; 821, first flow control valve; 83, second auxiliary cooling branch pipe; 831, second flow control valve; 84, driving source; 85, first outflow pipe; 851, first temperature sensor; 86, second outflow pipe; 861, second temperature sensor; 87, first heat exchange pipe; 88, second heat exchange pipe; 89, on-off valve; 9, flow blocking valve; 10, medium supply tank. DETAILED DESCRIPTION

[0028] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 7 The present application will be further described in detail.

[0029] Embodiment 1

[0030] The magnetic refrigeration structure provided by the embodiments of the present application comprises a magnetic field source 1 and a ring-shaped magnetic conducting outer frame 2. Referring to Figure 1The magnetic conducting outer frame 2 comprises a first magnetic conducting column 21 and a second magnetic conducting column 22, two first magnetic conducting columns 21 are oppositely arranged, and two second magnetic conducting columns 22 are also oppositely arranged; the first magnetic conducting column 21 is arranged perpendicularly to the second magnetic conducting column 22, and the two first magnetic conducting columns 21 are located between the two second magnetic conducting columns 22, and the first magnetic conducting column 21 and the second magnetic conducting column 22 are connected to form a rectangular ring-shaped magnetic conducting outer frame 2. The first magnetic conducting column 21 and the second magnetic conducting column 22 can be made of a material with good magnetic conducting performance, such as electrical pure iron, which can effectively guide the magnetic lines of force. The first magnetic conducting column 21 and the second magnetic conducting column 22 are cuboid-shaped.

[0031] With reference to Figure 1 and Figure 2 The magnetic field source 1 is arranged inside the magnetic conducting outer frame 2, and the magnetic field source 1 comprises a first magnetic supply group and a second magnetic supply group. The first magnetic supply group comprises a plurality of first magnetic blocks 11 connected in sequence in a straight line direction, and the first magnetic blocks 11 are attached to the outer side wall of one second magnetic conducting column 22. The second magnetic supply group comprises a plurality of second magnetic blocks 12 connected in sequence in a straight line direction, and the second magnetic blocks 12 are attached to the outer side wall of another second magnetic conducting column 22. The first magnetic supply group and the second magnetic supply group are parallel to each other, and the first magnetic supply group, the second magnetic supply group and the inner side wall of the magnetic conducting outer frame 2 form a working air gap 3. The polarity of the first magnetic block 11 and the polarity of the second magnetic block 12 are opposite, specifically, the N pole of the first magnetic block 11 faces the working air gap 3 direction, and the N pole of the second magnetic block 12 also faces the working air gap 3 direction; so that the magnetic field source 1 and the magnetic conducting outer frame 2 form a plurality of annular closed magnetic circuits around the working air gap 3, which achieves the effect of making the magnetic field distribution more uniform and stable, reducing the leakage of the magnetic field, and improving the uniformity and reliability of the cooling effect. This is because the closed magnetic circuit can reduce the divergence of the magnetic field, concentrate the magnetic field in the working air gap 3, and thus improve the uniformity and stability of the magnetic field.

[0032] The first magnetic block 11 and the second magnetic block 12 are both selected from permanent magnets, such as neodymium-iron-boron magnets, which can provide a strong magnetic field. The shape of the first magnetic block 11 and the second magnetic block 12 is selected as a cuboid to facilitate processing and installation. A heat-resistant adhesive layer 6 is arranged between adjacent two first magnetic blocks 11, and the heat-resistant adhesive layer 6 can be made of a high-temperature-resistant adhesive, such as a ceramic-based adhesive. A heat-resistant adhesive layer 6 is also arranged between adjacent two second magnetic blocks 12, and the same adhesive method and material as the first magnetic block 11 are used to ensure the connectivity in a high-temperature environment.

[0033] The connecting surfaces of the first magnetic blocks 11 are controlled to be flat when the first magnetic blocks 11 are connected in sequence, and the connecting surfaces of the second magnetic blocks 12 are controlled to be flat when the second magnetic blocks 12 are connected in sequence, so as to ensure the continuity of the magnetic field. In this embodiment, three first magnetic blocks 11 are arranged in the first magnetic supply group, and three second magnetic blocks 12 are arranged in the second magnetic supply group. By arranging a plurality of first magnetic blocks 11 and a plurality of second magnetic blocks 12 as the magnetic field source 1, the length-diameter ratio can be controlled, so as to prevent demagnetization, and in addition, the magnetic field distribution after the first magnetic blocks 11 or the second magnetic blocks 12 are spliced is more uniform.

[0034] With reference to Figure 1 The magnetically conductive outer frame 2 is further provided with a connecting assembly 7, and the connecting assembly 7 comprises first connecting bolts 71, second connecting bolts 72, first reinforcing bolts 73 and second reinforcing bolts 74. The two ends of each second magnetically conductive column 22 are provided with the first connecting bolts 71, the first connecting bolts 71 are threadedly connected in the first magnetically conductive column 21, one side of each first connecting bolt 71 is provided with the first reinforcing bolt 73, the first reinforcing bolt 73 is perpendicularly and spacedly arranged on the second magnetically conductive column 22, and the first reinforcing bolt 73 is threadedly connected in the first magnetically conductive column 21, so as to further enhance the connection stability between the first magnetically conductive column 21 and the second magnetically conductive column 22.

[0035] The two ends of each second magnetically conductive column 22 are provided with the second connecting bolts 72, the second connecting bolts 72 on one second magnetically conductive column 22 are threadedly connected in the first magnetic supply group, and the second connecting bolts 72 on the other second magnetically conductive column 22 are threadedly connected in the second magnetic supply group. The second reinforcing bolts 74 are located at the middle portions of the second magnetically conductive columns 22, a plurality of second reinforcing bolts 74 are perpendicularly and spacedly arranged on the second magnetically conductive column 22, the second reinforcing bolts 74 on one second magnetically conductive column 22 are threadedly connected in the first magnetic supply group, and the second reinforcing bolts 74 on the other second magnetically conductive column 22 are threadedly connected in the second magnetic supply group. The second reinforcing bolts 74 and the second connecting bolts 72 jointly ensure the connection stability of the first magnetic supply group and the second magnetic supply group with the magnetically conductive outer frame 2. In this embodiment, six first reinforcing bolts 73 and two second reinforcing bolts 74 are arranged on one second magnetically conductive column 22.

[0036] With reference to Figure 1 Two connecting plates 5 are spacedly arranged in the working air gap 3, the connecting plates 5 correspond to the first magnetically conductive columns 21 one by one, and the connecting plates 5 are fixedly connected with the corresponding magnetically conductive columns through screws. The connecting plates 5 are provided with pipe clamping holes 51, and the first magnetically conductive columns 21 are provided with through holes 213 corresponding to the pipe clamping holes 51. The connecting plates 5 can be made of magnetically conductive metal materials, and the shape thereof can be rectangular. The pipe clamping holes 51 are matched with the cooling pipes 4 in size, so as to ensure that the cooling pipes 4 can be stably installed on the connecting plates 5.

[0037] The cooling pipe 4 is arranged on the magnetic conductive outer frame 2, and the cooling pipe 4 passes through one clamping pipe hole 51 along one through hole 213, and then passes through another clamping pipe hole 51 along another through hole 213, so that the cooling pipe 4 is installed on the magnetic conductive outer frame 2. In this way, the pipe segment part in the cooling pipe 4 is located in the working air gap 3. When the magnetic heat working medium reciprocates in the working air gap 3 and demagnetization and heat absorption are performed, the coolant in the cooling pipe 4 can be directly and efficiently cooled. The connecting plate 5 fixes the cooling pipe 4 in the working air gap 3, so that the relative position of the cooling pipe 4 and the magnetic heat working medium is stable. In this way, when the magnetic heat working medium reciprocates in the working air gap 3, the cooling pipe 4 is in the best heat exchange position. The cooling pipe 4 includes an inflow end and an outflow end. The outflow end of the cooling pipe 4 is communicated with a first flow guide pipe 41 and a second flow guide pipe 42. The first flow guide pipe 41 and the second flow guide pipe 42 are each provided with a flow cutoff valve 9. The inflow end of the cooling pipe 4 is connected to the coolant, so that the magnetic heat working medium reciprocates in the working air gap 3. When the magnetic heat working medium is demagnetized, the coolant in the cooling pipe 4 can be uniformly cooled. The two flow cutoff valves 9 are controlled, so that the cooled coolant is discharged from the first flow guide pipe 41 to the area to be cooled. When the magnetic heat working medium is magnetized, the coolant in the cooling pipe 4 can be uniformly heated. The two flow cutoff valves 9 are controlled, so that the heated coolant is discharged from the second flow guide pipe 42 to the area to be heated or the remaining liquid storage area for heat dissipation.

[0038] The implementation principle of the magnetic refrigeration structure in the embodiment 1 is that a closed magnetic circuit is formed around the working air gap 3 by the annular magnetic conductive outer frame 2 and the first magnetic supply group and the second magnetic supply group with opposite polarities, so that the problems of uneven magnetic field and easy demagnetization are solved, and the uniformity and reliability of the cooling effect are improved. The high-temperature-resistant adhesive is used to fix the adjacent first magnetic blocks 11 and the adjacent second magnetic blocks 12, so that the connectivity of the magnetic field source 1 in the high-temperature environment is enhanced, and the normal work in the high-temperature environment is ensured. Meanwhile, the connecting assembly 7 ensures the connection stability between the parts of the magnetic conductive outer frame 2 and the first magnetic supply group, the second magnetic supply group and the magnetic conductive outer frame 2. Compared with the traditional magnetic refrigeration structure, the magnetic field uniformity, stability and high-temperature adaptability are significantly improved.

[0039] Embodiment 2

[0040] The difference between the embodiment and the embodiment 1 is that: Reference Figure 3 and Figure 4The auxiliary cooling assembly 8 is arranged, and the auxiliary cooling assembly 8 comprises an auxiliary cooling main pipe 81 and a driving source 84. One end of the auxiliary cooling main pipe 81 is connected with the first flow guide pipe 41 of the discharge end of the cooling pipe 4, and the other end of the auxiliary cooling main pipe 81 is connected with a first auxiliary cooling branch pipe 82 and a second auxiliary cooling branch pipe 83. The first cooling cavity is arranged in each first magnetic guide column 21, and the first cooling cavity comprises a first inflow chamber 214 and a first outflow chamber 215 which are arranged at intervals. The first inflow chamber 214 is connected with a first inlet, and the first outflow chamber 215 is connected with a first outlet. The first inlet and the first outlet are arranged on the first magnetic guide column 21. The second cooling cavity is arranged in each second magnetic guide column 22, and the second cooling cavity comprises a second inflow chamber 223 and a second outflow chamber 224 which are arranged at intervals. The second inflow chamber 223 is connected with a second inlet, and the second outflow chamber 224 is connected with a second outlet. The second inlet and the second outlet are arranged on the second magnetic guide column 22. The driving source 84 is arranged on the auxiliary cooling main pipe 81, and is used for driving the heat exchange medium in the auxiliary cooling main pipe 81 to move into the first cooling cavity and the second cooling cavity. The driving source 84 can be a liquid pump. The first outflow pipe 85 is connected with the first outlet, and a first temperature detector 851 is arranged on the pipe section close to the first outlet. The first auxiliary cooling branch pipe 82 is connected with the first inlet, and a first flow control valve 821 is arranged on the first auxiliary cooling branch pipe 82. The first temperature detector 851 is electrically connected with the first flow control valve 821. The second outflow pipe 86 is connected with the second outlet, and a second temperature detector 861 is arranged on the pipe section close to the second outlet. The second auxiliary cooling branch pipe 83 is connected with the second inlet, and a second flow control valve 831 is arranged on the second auxiliary cooling branch pipe 83. The second temperature detector 861 is electrically connected with the second flow control valve 831. Through the arrangement, the flow of the heat exchange medium into the first cooling cavity and the second cooling cavity can be automatically adjusted according to the temperature of the corresponding outlet, so that accurate temperature control is realized. In the embodiment, the first temperature detector 851 and the second temperature detector 861 are both temperature sensors, and the first flow control valve 821 and the second flow control valve 831 are both electromagnetic valves.

[0041] With reference to Figure 3 In the embodiment, the connecting assembly 7 is not arranged, the first magnetic guide column 21 and the second magnetic guide column 22 are fixed by welding, and the first magnetic guide column 21 and the second magnetic guide column 22 are also fixed by welding with the magnetic field source 1. Figure 4 and Figure 5 The first cooling cavity comprises a flow guide chamber 216, the flow guide chamber 216 is arranged close to the through hole 213, and the connection between the cooling pipe 4 and the through hole 213 is sealed and connected by a sealing ring. A plurality of first micro flow channels 211 and second micro flow channels 212 are connected between the first inflow chamber 214 and the flow guide chamber 216, and a plurality of first micro flow channels 211 and second micro flow channels 212 are also connected between the first outflow chamber 215 and the flow guide chamber 216. The first micro flow channels 211 are arranged at intervals close to the magnetic field source 1.Figure 4 and Figure 6 The second cooling cavity comprises third micro-flow channels 221 and fourth micro-flow channels 222 which are communicated between the second inlet chamber 223 and the second outlet chamber 224. The third micro-flow channels 221 are arranged in multiple rows near the magnetic field source 1. The number of the first micro-flow channels 211 is greater than the number of the second micro-flow channels 212, and the number of the third micro-flow channels 221 is greater than the number of the fourth micro-flow channels 222. Such a design can make more heat exchange medium flow in the area near the magnetic field source 1, thereby improving the cooling effect. The shape of the micro-flow channel can be rectangular, which is convenient for processing and fluid flow. Specifically, in this embodiment, two rows of first micro-flow channels 211 are arranged in one first magnetic conducting column 21, and the opening area of the first micro-flow channels 211 is distributed in the contact area of the magnetic field source 1 and the first magnetic conducting column 21.

[0042] The coolant in the cooling pipe 4 and the heat exchange medium in the auxiliary cooling main pipe 81 are both selected to be perfluoropolyether oil, which can work normally in a high-temperature environment.

[0043] The implementation principle of this embodiment is that the auxiliary cooling assembly 8 combines the first cooling cavity and the second cooling cavity, cooperates with the first flow control valve 821, the second flow control valve 831, the first temperature sensor 851 and the second temperature sensor 861 for closed-loop control, and realizes precise temperature regulation. The first temperature sensor 851 detects the temperature near the first outlet, and adjusts the opening degree of the first flow control valve 821 through electrical connection. The second temperature sensor 861 detects the temperature near the second outlet, and adjusts the opening degree of the second flow control valve 831 through electrical connection, so as to ensure that the temperature of the magnetic conducting outer frame 2 is uniform, and prevent the magnetic circuit from being distorted due to high temperature deformation at the connection between the magnetic conducting outer frame 2 and the magnetic field source 1. The auxiliary cooling main pipe 81 utilizes the cold energy of the outlet end of the cooling pipe 4, and does not need an additional cooling source. The first micro-flow channels 211 and the third micro-flow channels 221 are arranged to enhance the cooling effect near the magnetic field source 1.

[0044] Embodiment 3

[0045] The difference between this embodiment and embodiment 2 is that: Reference Figure 7In the embodiment, the auxiliary cooling main pipe 81 is not communicated with the cooling pipe 4, and directly passes through the two connecting plates 5 along the magnetic conductive outer frame 2 and then passes out of the magnetic conductive outer frame 2, the pipe segment part in the auxiliary cooling main pipe 81 is located in the working air gap 3, and the connection between the auxiliary cooling main pipe 81 and the magnetic conductive outer frame 2 is sealed by a sealing ring. One end of the auxiliary cooling main pipe 81 is communicated with the medium supply tank 10, the other end of the auxiliary cooling main pipe 81 is communicated with the first heat exchange pipe 87 and the second heat exchange pipe 88, and the first heat exchange pipe 87 and the second heat exchange pipe 88 are both provided with an on-off valve 89. The first heat exchange pipe 87 is communicated with the first auxiliary cooling branch pipe 82 and the second auxiliary cooling branch pipe 83, so that the heat exchange with the magnetic field source 1 in the working air gap 3 can be better. The liquid pump is started, and the magnetic heat working medium reciprocates in the working air gap 3, when the magnetic heat working medium demagnetizes, the heat exchange medium in the auxiliary cooling main pipe 81 can be uniformly cooled, the two on-off valves 89 are controlled, and the cooled heat exchange medium is discharged from the first heat exchange pipe 87 to the first auxiliary cooling branch pipe 82 and the second auxiliary cooling branch pipe 83. When the magnetic heat working medium magnetizes, the heat exchange medium in the auxiliary cooling main pipe 81 can be uniformly heated, and the two on-off valves 9 are controlled, and the heated heat exchange medium is discharged from the second heat exchange pipe 88 to the to-be-heated area or the remaining area.

[0046] In the embodiment, the heat exchange medium in the auxiliary cooling main pipe 81 can be selected from perfluoropolyether oil or air.

[0047] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A magnetic refrigeration structure, characterized in that: It includes a magnetic field source (1) and a ring-shaped magnetically conductive outer frame (2), wherein the magnetic field source (1) is disposed inside the magnetically conductive outer frame (2); The magnetic field source (1) includes a first magnetic supply group and a second magnetic supply group arranged in parallel. The first magnetic supply group includes a plurality of first magnetic blocks (11) connected in sequence, and the second magnetic supply group includes a plurality of second magnetic blocks (12) connected in sequence. A working air gap (3) is formed between the first magnetic supply group, the second magnetic supply group and the inner wall of the magnetically conductive outer frame (2). The polarity of the first magnetic block (11) is opposite to that of the second magnetic block (12). The magnetic field source (1) and the magnetically conductive outer frame (2) form multiple closed magnetic circuits around the working air gap (3).

2. The magnetic refrigeration structure according to claim 1, characterized in that: The magnetic outer frame (2) includes a first magnetic post (21) and a second magnetic post (22) connected to each other. There are two first magnetic posts (21) and two second magnetic posts (22) arranged opposite each other. The first magnetic post (21) is arranged perpendicular to the second magnetic post (22).

3. The magnetic refrigeration structure according to claim 2, characterized in that: A cooling pipe (4) is installed on the magnetic outer frame (2), and a section of the cooling pipe (4) is located in the working air gap (3). Two connecting plates (5) are spaced apart in the working air gap (3). The connecting plates (5) are connected to the inner side wall of the magnetic outer frame (2). Each connecting plate (5) has a tube-clamping hole (51) for the cooling pipe (4) to be accommodated. The magnetic outer frame (2) has a through hole (213) corresponding to the tube-clamping hole (51).

4. The magnetic refrigeration structure according to claim 2, characterized in that: A heat-resistant adhesive layer (6) is provided between two adjacent first magnetic blocks (11), and a heat-resistant adhesive layer (6) is also provided between two adjacent second magnetic blocks (12).

5. A magnetic refrigeration structure according to claim 2, characterized in that: The magnetic outer frame (2) is also provided with a connecting component (7), which includes a first connecting bolt (71), a second connecting bolt (72), a first reinforcing bolt (73), and a second reinforcing bolt (74). The first connecting bolt (71) is threaded through both ends of the second magnetic post (22), and the first connecting bolt (71) is threaded into the first magnetic post (21); Each of the first connecting bolts (71) is provided with a first reinforcing bolt (73) on one side. Multiple first reinforcing bolts (73) are spaced apart on the second magnetic post (22) perpendicular to the length direction of the second magnetic post (22), and the first reinforcing bolts (73) are threaded into the first magnetic post (21). The second magnetic column (22) has the second connecting bolt (72) through both ends, and the second connecting bolt (72) is threaded into the first magnetic supply group or the second magnetic supply group; The second reinforcing bolt (74) is located in the middle of the second magnetic column (22). Multiple second reinforcing bolts (74) are spaced along the length of the second magnetic column (22) and are threaded into the first magnetic supply group or the second magnetic supply group.

6. A magnetic refrigeration structure according to claim 3, characterized in that: It also includes an auxiliary cooling component (8), which includes an auxiliary cooling main pipe (81) and a drive source (84). The first magnetic column (21) is provided with a first cooling chamber, which is connected to a first inlet and a first outlet; The second magnetic column (22) is provided with a second cooling chamber, which is connected to a second inlet and a second outlet; Both the first inlet and the second inlet are connected to the auxiliary cooling main pipe (81), and the driving source (84) is used to drive the heat exchange medium in the auxiliary cooling main pipe (81) to move towards the first cooling chamber and the second cooling chamber.

7. A magnetic refrigeration structure according to claim 6, characterized in that: The first cooling chamber includes a first microchannel (211) and a second microchannel (212) communicating between the first inlet and the first outlet, with the first microchannel (211) disposed close to the magnetic field source (1); The second cooling chamber includes a third microchannel (221) and a fourth microchannel (222) communicating between the second inlet and the second outlet, wherein the third microchannel (221) is disposed close to the magnetic field source (1); The number of the first microchannel (211) is greater than the number of the second microchannel (212), and the number of the third microchannel (221) is greater than the number of the fourth microchannel (222).

8. A magnetic refrigeration structure according to claim 7, characterized in that: Each of the first inlets is connected to a first auxiliary cooling branch pipe (82), and each of the second inlets is connected to a second auxiliary cooling branch pipe (83). The first auxiliary cooling branch pipe (82) and the second auxiliary cooling branch pipe (83) are both connected to the auxiliary cooling main pipe (81). A first flow control valve (821) is provided on the first auxiliary cooling branch pipe (82), and a first thermometer (851) is provided at the first outlet. The first thermometer (851) is electrically connected to the first flow control valve (821). A second flow control valve (831) is installed on the second auxiliary cooling branch pipe (83), and a second thermometer (861) is installed on the second outlet. The second thermometer (861) is electrically connected to the second flow control valve (831).

9. A magnetic refrigeration structure according to claim 8, characterized in that: The cooling pipe (4) includes an inlet end and an outlet end, and one end of the auxiliary cooling pipe (81) is connected to the outlet end of the cooling pipe (4).

10. A magnetic refrigeration structure according to claim 8, characterized in that: The auxiliary cooling main pipe (81) is installed on the magnetic outer frame (2), and the pipe section inside the auxiliary cooling main pipe (81) is located in the working air gap (3).

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