Compact room-temperature magnetic refrigerator and refrigeration method of same

Abstract

A compact room-temperature magnetic refrigerator includes a cold-end heat exchanger 1, a left regenerator 2 containing magnetic refrigerant, an I-shaped magnet 3, a left hot-end heat exchanger 4, a left corrugated liquid storage tank 5, a left buffer pressurizer 6, an extension rod 7, a right buffer pressurizer 8, a right corrugated liquid storage tank 9, a right hot-end heat exchanger 10 and a right regenerator 11 containing a magnetic refrigerant. Wherein moving the magnet to the left side on a sliding rail also drives the extension rod to the left, which squeezes the left tank via the left buffer pressuriser; and, moving the magnet to the right side drives the extension rod to the right, which compresses the right tank via the right buffer pressuriser, thus generating flow of heat exchange fluid. A refrigeration method is also claimed.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of room-temperature magnetic refrigerators, and specifically relates to a compact room-temperature magnetic refrigerator and a refrigeration method of the same. BACKGROUND

[0002] Room-temperature magnetic refrigeration is a solid-state refrigeration technology and also a new refrigeration technology. With the development of new materials and technologies, the development of room-temperature magnetic refrigeration technology has been paid more and more attention in recent ten years, and great progress has been made. Room-temperature magnetic refrigeration technology meets the requirement of sustainable development, and is considered as a green refrigeration technology expected to replace traditional refrigeration technology.

[0003] Room-temperature magnetic refrigeration technology is a technology that uses magnetocaloric effect of magnetic refrigeration materials to realize refrigeration. According to the principle of magnetocaloric effect, magnetic refrigeration materials can heat up or cool down under the action of changing magnetic field. At present, active magnetic regeneration (AMR) technology is usually used in the room-temperature magnetic refrigerator to realize refrigeration. The technology requires that the heat exchange fluid flows through the regenerator filled with magnetic refrigeration materials in forward and reverse directions during magnetization and demagnetization, so as to form certain temperature gradients in the magnetic refrigerant inside the regenerator, thus forming a high temperature end and a low temperature end at both ends of the regenerator, and forming a large temperature difference at both ends. At the same time, a large temperature difference of the heat exchange fluid is also formed at both ends, so that refrigeration can be realized.

[0004] The room-temperature magnetic refrigerator is usually composed of a magnetic field system, a regenerator, a heat exchanger, a heat exchange fluid and a driver, wherein the regenerator is one of key components of the room-temperature magnetic refrigerator. The regenerator periodically magnetizes and demagnetizes by the magnetic field, and the heat exchange fluid flows back and forth to form temperature gradients inside the regenerator, and a high temperature end 20 05 24 and a low temperature end are formed at both ends of the regenerator to realize refrigeration. At present, AMR technology is usually used in the room-temperature magnetic refrigerator to improve the temperature span at both ends of the regenerator, and the heat exchange fluid is required to flow back and forth through the regenerator along with the magnetization and demagnetization of the regenerator, so that temperature gradients are formed at both ends of the regenerator. Therefore, a pump is usually required as a fluid driver and a fluid distributor is usually required as a fluid switcher. Usually, a magnetic field driver, a fluid driver and a fluid distributor are basically configured in the room-temperature magnetic refrigerator. In some large roomtemperature magnetic refrigerators, the design and manufacture of the fluid distributor are very complicated, resulting in difficulty in sealing, increased mechanical loss and other problems. SUMMARY

[0005] The present disclosure aims to provide a compact room-temperature magnetic refrigerator and a refrigeration method of the same. The present disclosure adopts a single driving source to realize the driving of the I-shaped magnet and the driving and commutation of a heat exchange fluid, thus realizing the AMR cycle required by the room-temperature magnetic refrigerator.

[0006] To achieve the above objective, the present disclosure has the following technical solutions.

[0007] A compact room-temperature magnetic refrigerator includes a cold-end heat exchanger, a first regenerator, an I-shaped magnet, a first hot-end heat exchanger, a first corrugated liquid storage tank, a first buffer pressurizer, an extension rod, a second buffer pressurizer, a second corrugated liquid storage tank, a second hot-end heat exchanger and a second regenerator. A first port of the cold-end heat exchanger and an upper port of the first hot-end heat exchanger are respectively connected to both ends of the first regenerator through pipelines, and a lower port of the first hot-end heat exchanger is connected to the second corrugated liquid storage tank through a pipeline. A second port of the cold-end heat exchanger and an upper port of the second hot-end heat exchanger are respectively connected to both ends of the second regenerator through pipelines, and a lower port of the second hot-end heat exchanger is connected to the first corrugated liquid storage tank through a pipeline. The I-shaped magnet is located between the first regenerator and the second regenerator, a first magnet opening and a second magnet opening are respectively formed in both sides of the I-shaped magnet, the I-shaped magnet is installed on a driving component, and a lower part of the I-shaped magnet is connected with the extension rod. The first corrugated liquid storage tank and the second corrugated liquid storage tank are located on first and second sides of a lower part of the extension rod, both ends of the first buffer pressurizer are respectively connected to and between the extension rod and the first corrugated liquid storage 20 05 24 tank, and both ends of the second buffer pressurizer are respectively connected to and between the extension rod and the second corrugated liquid storage tank.

[0008] In some embodiments, inner cavities of the first regenerator and the second regenerator are filled with a magnetic refrigerant, the first magnet opening is aligned with the first regenerator, the second magnet opening is aligned with the second regenerator, and the cold-end heat exchanger is placed in a cold chamber.

[0009] In some embodiments, the driving component includes a sliding rail, a sliding block, a motor and a rocker arm, the I-shaped magnet is fixed to the sliding block, the sliding block is installed in a sliding chute of the sliding rail, the motor is fixed to a side of the sliding rail, an end of a rotating shaft of the motor is provided with a hinged disc, a side of the hinged disc is hinged with one end of the rocker arm, and the other end of the rocker arm is hinged with the sliding block.

[0010] In some embodiments, the first buffer pressurizer and the second buffer pressurizer each include a spring and a push plate, inner end parts of the two springs are respectively connected to both sides of the extension rod, and outer end parts of the two springs are respectively connected with the push plates.

[0011] In some embodiments, the I-shaped magnet includes a connecting piece, a soft magnetic material frame and a plurality of permanent magnets, the permanent magnets are fixed to upper and lower sides of the soft magnetic material frame, the connecting piece is connected to and between the permanent magnets on the upper and lower sides, and the first magnet opening and the second magnet opening are formed in both sides of the connecting piece.

[0012] In some embodiments, the magnetic field directions of the permanent magnets on the upper and lower sides of the first magnet opening are the same, and the magnetic field directions of the permanent magnets on the upper and lower sides of the second magnet opening are the same.

[0013] A refrigeration method of the compact room-temperature magnetic refrigerator includes the following steps:

[0014] moving the I-shaped magnet towards a first side to drive the extension rod to move to the first side, so as to squeeze the first buffer pressurizer by the extension rod, and squeeze the first corrugated liquid storage tank by the first buffer pressurizer for contraction; the first regenerator entering the first magnet opening, magnetizing and heating a heat exchange fluid, the second regenerator leaving the second magnet opening, demagnetizing and cooling the heat exchange fluid;

[0015] compressing the first corrugated liquid storage tank by the first buff pressurizer to squeeze the heat exchange fluid out of the first corrugated liquid storage tank, the heat exchange fluid flowing through the second hot-end heat exchanger, entering the second regenerator for cooling, 20 05 24 after the cooling entering the cold-end heat exchanger for a primary heat exchange, after the primary heat exchange entering the first regenerator for heating, after the heating entering the first hot-end heat exchanger for a secondary heat exchange, and after the secondary heat exchange entering the second corrugated liquid storage tank; moving the I-shaped magnet towards a second side to drive the extension rod to move towards the second side, so as to squeeze the second buffer pressurizer by the extension rod, and squeeze the second corrugated liquid storage tank by the second buffer pressurizer for contraction; the second regenerator entering the second magnet opening, magnetizing and heating the heat exchange fluid, the first regenerator leaving the first magnet opening, demagnetizing and cooling the heat exchange fluid; and

[0016] compressing the second corrugated liquid storage tank by the second buff pressurizer to squeeze the heat exchange fluid out of the second corrugated liquid storage tank, the heat exchange fluid flowing through the first hot-end heat exchanger, entering the first regenerator for cooling, after the cooling entering the cold-end heat exchanger for the primary heat exchange, after the primary heat exchange entering the second regenerator for heating, after the heating entering the second hot-end heat exchanger for a tertiary heat exchange, and after the tertiary heat exchange entering the first corrugated liquid storage tank.

[0017] In some embodiments, with the periodic reciprocating movement of the I-shaped magnet, temperature gradients which are low at an upper part and high at a lower part are gradually formed in the first regenerator and the second regenerator, and the heat exchange fluid takes away heat in the cold chamber when flowing through the cold-end heat exchanger to realize refrigeration; and when the high-temperature fluid at the lower part flows through the first hot-end heat exchanger and the second hot-end heat exchanger, the heat is discharged.

[0018] In some embodiments, the rotating shaft of the motor drives the hinged disc to rotate, the hinged disc drives the sliding block to reciprocate between the first side and the second side on the sliding rail through the rocker arm, and the sliding block drives the I-shaped magnet to reciprocate between the first side and the second side, so that the first regenerator reciprocates between the first side and the second side to get in and out of the first magnet opening, and the second regenerator reciprocates between the first side and the second side to get in and out of the second magnet opening, thus realizing repeated periodic magnetization or demagnetization of the first regenerator and the second regenerator.

[0019] The present disclosure has the following beneficial effects.

[0020] The present disclosure adopts a single driving source to realize the driving of the I-shaped magnet and the driving and commutation of a heat exchange fluid, thus realizing the AMR cycle required by the room-temperature magnetic refrigerator. 20 05 24 BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a structural schematic diagram of a compact room-temperature magnetic refrigerator in the present disclosure.

[0022] FIG. 2 is a structural schematic diagram of an I-shaped magnet in the present disclosure.

[0023] FIG. 3 is a schematic diagram of temperature gradients generated in a first regenerator and a second regenerator under the action of an external magnetic field system in the present disclosure.

[0024] FIG. 4 is a magnetic field and time sequence diagram of magnetization / demagnetization of the first regenerator and the second regenerator in the present disclosure.

[0025] FIG. 5 is a time sequence diagram of heat exchange fluids and the time for the first regenerator and the second regenerator in the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following description fully shows specific embodiments of the present disclosure, so that those skilled in the art can practice and reproduce the specific embodiments.

[0027] As shown in FIG. 1, FIG. 1 is a structural schematic diagram of a compact roomtemperature magnetic refrigerator in the present disclosure.

[0028] The compact room-temperature magnetic refrigerator includes a cold-end heat exchanger 1, a first regenerator 2, an I-shaped magnet 3, a first hot-end heat exchanger 4, a first corrugated liquid storage tank 5, a first buffer pressurizer 6, an extension rod 7, a second buffer pressurizer 8, a second corrugated liquid storage tank 9, a second hot-end heat exchanger 10 and a second regenerator 11.

[0029] A first port of the cold-end heat exchanger 1 and an upper port of the first hot-end heat exchanger 4 are respectively connected to both ends of the first regenerator 2 through pipelines, and a lower port of the first hot-end heat exchanger 4 is connected to the second corrugated liquid storage tank 9 through a pipeline. A second port of the cold-end heat exchanger 1 and an upper port of the second hot-end heat exchanger 10 are respectively connected to both ends of the second regenerator 11 through pipelines, and a lower port of the second hot-end heat exchanger 10 is connected to the first corrugated liquid storage tank 5 through a pipeline. The I-shaped magnet 3 is located between the first regenerator 2 and the second regenerator 11, a first magnet opening 34 and a second magnet opening 35 are respectively formed in both sides of the I-shaped magnet 3, the I-shaped magnet 3 is installed on a driving component, and a lower part of the I-shaped magnet 3 is connected with the extension rod 7. The first corrugated liquid storage tank 5 and the second 20 05 24 corrugated liquid storage tank 9 are located on first and second sides of a lower part of the extension rod 7, both ends of the first buffer pressurizer 6 are respectively connected to and between the extension rod 7 and the first corrugated liquid storage tank 5, and both ends of the second buffer pressurizer 8 are respectively connected to and between the extension rod 7 and the second corrugated liquid storage tank 9.

[0030] Inner cavities of the first regenerator 2 and the second regenerator 11 are filled with a magnetic refrigerant. The first magnet opening 34 is aligned with the first regenerator 2, and the second magnet opening 35 is aligned with the second regenerator 11.

[0031] The driving component includes a sliding rail, a sliding block, a motor and a rocker arm, the I-shaped magnet 3 is fixed to the sliding block, the sliding block is installed in a sliding chute of the sliding rail, the motor is fixed to a side of the sliding rail, an end of a rotating shaft of the motor is provided with a hinged disc, a side of the hinged disc is hinged with one end of the rocker arm, and the other end of the rocker arm is hinged with the sliding block. The rotating shaft of the motor drives the hinged disc to rotate, the hinged disc drives the sliding block to reciprocate between the first side and the second side on the sliding rail through the rocker arm, and the sliding block drives the I-shaped magnet 3 to reciprocate between the first side and the second side, so that the first regenerator 2 reciprocates between the first side and the second side to get in and out of the first magnet opening, and the second regenerator 11 reciprocates between the first side and the second side to get in and out of the second magnet opening, thus realizing repeated periodic magnetization or demagnetization of the first regenerator 2 and the second regenerator 11.

[0032] In the present disclosure, the first buffer pressurizer 6 and the second buffer pressurizer 8 play the role of buffering and delaying fluid flow, so that the movement of the I-shaped magnet 3 is coordinated and synchronized with the flow of the heat exchange fluid, and the operation is in accordance with a certain time sequence. The first buffer pressurizer 6 and the second buffer pressurizer 8 each include a spring and a push plate, inner end parts of the two springs are respectively connected to both sides of the extension rod 7, and outer end parts of the two springs are respectively connected with the push plates.

[0033] The cold-end heat exchanger 1 is placed in a cold chamber 12.

[0034] As shown in FIG. 2, FIG. 2 is a structural schematic diagram of an I-shaped magnet 3 in the present disclosure.

[0035] The I-shaped magnet 3 includes a plurality of permanent magnets 31, a connecting piece 32 and a soft magnetic material frame 33. The connecting piece 32 and the permanent magnets 31 are fixed to upper and lower sides of the soft magnetic material frame 33, the connecting piece 32 is connected to and between the permanent magnets 31 on the upper and lower sides. The first 20 05 24 magnet opening 34 and the second magnet opening 35 are formed in both sides of the connecting piece 32. The magnetic field directions of the permanent magnets 31 on the upper and lower sides of the first magnet opening 34 are the same, and the magnetic field directions of the permanent magnets 31 on the upper and lower sides of the second magnet opening 35 are the same.

[0036] The arrow indicates the magnetization direction of the permanent magnet 31, and the connecting piece 32 is made of a non-ferromagnetic material. The first magnet opening 34 and the second magnet opening 35 are available magnetic field spaces to magnetize the first regenerator 2 and the second regenerator 11. When the I-shaped magnet 3 reciprocates between the first side and the second side, the first regenerator 2 and the second regenerator 11 can be magnetized / demagnetized periodically.

[0037] As shown in FIG. 3, FIG. 3 is a schematic diagram of temperature gradients generated in a first regenerator 2 and a second regenerator 11 under the action of an external magnetic field system in the present disclosure.

[0038] The three lines in the figure are a magnetization line, a middle line and a demagnetization line from top to bottom, the abscissa is distances, and the ordinate is temperatures.

[0039] When the compact room-temperature magnetic refrigerator operates to a steady state, the temperature gradients are formed inside the first regenerator 2 and the second regenerator 11. When the first regenerator 2 and the second regenerator 11 are magnetized, the temperatures of the internal magnetic refrigerant and the static heat exchange fluid are simultaneously raised to the position of the magnetization line.

[0040] Taking the first regenerator 2 as an example, the first regenerator 2 magnetizes, the heat exchange fluid flows downward, and the temperature line gradually approaches the middle line. When the first regenerator 2 demagnetizes, the temperature line moves down to the demagnetization line, the heat exchange fluid flows up, and the temperature line moves up to the middle line step by step. After that, the next cycle of operation is carried out, and so on, thus realizing refrigeration.

[0041] As shown in FIG. 4, FIG. 4 is a magnetic field and time sequence diagram of magnetization / demagnetization of the first regenerator 2 and the second regenerator 11 in the present disclosure.

[0042] The solid line is the magnetization / demagnetization time sequence of the first regenerator 2, and the dashed line is the magnetization / demagnetization time sequence of the second regenerator 11. The first regenerator 2 and the second regenerator 11 periodically alternate magnetization and demagnetization.

[0043] As shown in FIG. 5, FIG. 5 is a time sequence diagram of heat exchange fluids and the 20 05 24 time for the first regenerator 2 and the second regenerator 11 in the present disclosure.

[0044] The solid line indicates flowing counterclockwise, and the dotted line indicates flowing clockwise. The solid line and the dotted line are synchronized with the first regenerator 2 and the second regenerator 11.

[0045] When the I-shaped magnet 3 moves to the first side and the first regenerator 2 magnetizes, the second regenerator 11 demagnetizes. At this time, the heat exchange fluid flows counterclockwise through a loop (distributed according to the structure in FIG. 1), that is, the heat exchange fluid in the first regenerator 2 flows downward and the heat exchange fluid in the second regenerator 11 flows upward. When the I-shaped magnet 3 moves to the second side, the second regenerator 11 magnetizes and the first regenerator 2 demagnetizes at the same time. At this time, the heat exchange fluid flows clockwise (distributed according to the structure in FIG. 1), that is, the heat exchange fluid inside the second regenerator 11 flows downward and the heat exchange fluid inside the first regenerator 2 flows upward. An outlet of the second corrugated liquid storage tank 9 is connected with the first hot-end heat exchanger 4, the first corrugated liquid storage tank 5 is connected with the second hot-end heat exchanger 10, and the I-shaped magnet 3 is periodically cycled to realize AMR circulation and refrigeration.

[0046] A refrigeration method of the compact room-temperature magnetic refrigerator includes the following specific steps:

[0047] Step one, the I-shaped magnet 3 is moved towards the first side to drive the extension rod 7 to move towards the first side, so that the extension rod 7 squeezes the first buffer pressurizer 6, and the first buffer pressurizer 6 squeezes the first corrugated liquid storage tank 5 for contraction; the first regenerator 2 enters the first magnet opening 34, magnetizes and heats a heat exchange fluid, the second regenerator 11 leaves the second magnet opening 35, demagnetizes and cools the heat exchange fluid.

[0048] The I-shaped magnet 3, the extension rod 7 and the first buffer pressurizer 6 and the second buffer pressurizer 8 on the I-shaped magnet 3 can move between the first side and the second side, and other parts are fixed.

[0049] Step two, the first buff pressurizer 6 compresses the first corrugated liquid storage tank 5 to squeeze the heat exchange fluid out of the first corrugated liquid storage tank 5, the heat exchange fluid flows through the second hot-end heat exchanger 10 and enters the second regenerator 11 for cooling, the cooled heat exchange fluid enters the cold-end heat exchanger for heat exchange and then enters the first regenerator 1 for heating, the heated heat exchange fluid enters the first hot-end heat exchanger 4 for heat exchange, and the heat exchange fluid after heat exchange enters the second corrugated liquid storage tank 9; 20 05 24

[0050] Step three, the I-shaped magnet 3 is moved towards the second side to drive the extension rod 7 to move towards the second side, so that the extension rod 7 squeezes the second buffer pressurizer 8, and the second buffer pressurizer 8 squeezes the second corrugated liquid storage tank 9 for contraction; the second regenerator 11 enters the second magnet opening 35, magnetizes and heats the heat exchange fluid, the first regenerator 2 leaves the first magnet opening 34, demagnetizes and cools the heat exchange fluid; and

[0051] Step four, the second buff pressurizer 8 compresses the second corrugated liquid storage tank 9 to squeeze the heat exchange fluid out of the second corrugated liquid storage tank 9, the heat exchange fluid flows through the first hot-end heat exchanger 4 and enters the first regenerator 2 for cooling, the cooled heat exchange fluid enters the cold-end heat exchanger 1 for heat exchange and then enters the second regenerator 11 for heating after heat exchange, the heated heat exchange fluid enters the second hot-end heat exchanger 10 for heat exchange, and the heat exchange fluid after heat exchange enters the first corrugated liquid storage tank 5.

[0052] With the periodic reciprocating movement of the I-shaped magnet 3, temperature gradients of a low upper part and a high lower part are gradually formed in the first regenerator 2 and the second regenerator 11, and the heat exchange fluid takes away heat in the cold chamber 12 when flowing through the cold-end heat exchanger 1 to realize refrigeration. When the high-temperature fluid at the lower end flows through the first hot-end heat exchanger 4 and the second hot-end heat exchanger 10, the heat is discharged.

[0053] Terms used in the present disclosure are illustrative and exemplary, instead of restrictive. As the present disclosure can be embodied in various forms without departing from the spirit or essence of the present disclosure, it should be understood that the above-mentioned embodiments are not limited to any of the foregoing details, but should be broadly interpreted within the spirit and scope defined by the appended claims, and therefore all changes and modifications that fall within the scope of the claims or equivalents thereof are intended to be covered by the appended claims.

Claims

20 05 241. A compact room-temperature magnetic refrigerator, comprising a cold-end heat exchanger, a first regenerator, an I-shaped magnet, a first hot-end heat exchanger, a first corrugated liquid storage tank, a first buffer pressurizer, an extension rod, a second buffer pressurizer, a second corrugated liquid storage tank, a second hot-end heat exchanger and a second regenerator, wherein a first port of the cold-end heat exchanger and an upper port of the first hot-end heat exchanger are respectively connected to both ends of the first regenerator through pipelines, and a lower port of the first hot-end heat exchanger is connected to the second corrugated liquid storage tank through a pipeline; a second port of the cold-end heat exchanger and an upper port of the second hot-end heat exchanger are respectively connected to both ends of the second regenerator through pipelines, and a lower port of the second hot-end heat exchanger is connected to the first corrugated liquid storage tank through a pipeline; the I-shaped magnet is located between the first regenerator and the second regenerator, a first magnet opening and a second magnet opening are respectively formed in both sides of the I-shaped magnet, the I-shaped magnet is installed on a driving component, and a lower part of the I-shaped magnet is connected with the extension rod; and the first corrugated liquid storage tank and the second corrugated liquid storage tank are located on first and second sides of a lower part of the extension rod, both ends of the first buffer pressurizer are respectively connected to and between the extension rod and the first corrugated liquid storage tank, and both ends of the second buffer pressurizer are respectively connected to and between the extension rod and the second corrugated liquid storage tank.

2. The compact room-temperature magnetic refrigerator according to claim 1, wherein inner cavities of the first regenerator and the second regenerator are filled with a magnetic refrigerant, the first magnet opening is aligned with the first regenerator, the second magnet opening is aligned with the second regenerator, and the cold-end heat exchanger is placed in a cold chamber.

3. The compact room-temperature magnetic refrigerator according to claim 1, wherein the driving component comprises a sliding rail, a sliding block, a motor and a rocker arm, the I-shaped magnet is fixed to the sliding block, the sliding block is installed in a sliding chute of the sliding rail, the motor is fixed to a side of the sliding rail, an end of a rotating shaft of the motor is provided with a hinged disc, a side of the hinged disc is hinged with one end of the rocker arm, and an other end of the rocker arm is hinged with the sliding block.

4. The compact room-temperature magnetic refrigerator according to claim 1, wherein the20 05 24first buffer pressurizer and the second buffer pressurizer each comprise a spring and a push plate, inner end parts of the spring of the first buffer pressurizer and the spring of the second buffer pressurizer are respectively connected to both sides of the extension rod, and outer end parts of the spring of the first buffer pressurizer and the spring of the second buffer pressurizer are respectively connected with the push plate of the first buffer pressurizer and the push plate of the second buffer pressurizer.

5. The compact room-temperature magnetic refrigerator according to claim 1, wherein the I-shaped magnet comprises a connecting piece, a soft magnetic material frame and a plurality of permanent magnets, the plurality of permanent magnets are fixed to upper and lower sides of the soft magnetic material frame, the connecting piece is connected to and between the permanent magnets on the upper and lower sides, and the first magnet opening and the second magnet opening are formed in both sides of the connecting piece.

6. The compact room-temperature magnetic refrigerator according to claim 5, wherein magnetic field directions of the permanent magnets on upper and lower sides of the first magnet opening are the same, and magnetic field directions of the permanent magnets on upper and lower sides of the second magnet opening are the same.

7. A refrigeration method of the compact room-temperature magnetic refrigerator according to claim 1, comprising the following steps:moving the I-shaped magnet towards a first side to drive the extension rod to move towards the first side, so as to squeeze the first buffer pressurizer by the extension rod, and squeeze the first corrugated liquid storage tank by the first buffer pressurizer for contraction; the first regenerator entering the first magnet opening, magnetizing and heating a heat exchange fluid, the second regenerator leaving the second magnet opening, demagnetizing and cooling the heat exchange fluid;compressing the first corrugated liquid storage tank by the first buff pressurizer to squeeze the heat exchange fluid out of the first corrugated liquid storage tank, the heat exchange fluid flowing through the second hot-end heat exchanger, entering the second regenerator for cooling, after the cooling entering the cold-end heat exchanger for a primary heat exchange, after the primary heat exchange entering the first regenerator for heating, after the heating entering the first hot-end heat exchanger for a secondary heat exchange, and after the secondary heat exchange entering the second corrugated liquid storage tank;moving the I-shaped magnet towards a second side to drive the extension rod to move20 05 24towards the second side, so as to squeeze the second buffer pressurizer by the extension rod, and squeeze the second corrugated liquid storage tank by the second buffer pressurizer for contraction; the second regenerator entering the second magnet opening, magnetizing and heating the heat exchange fluid, the first regenerator leaving the first magnet opening, demagnetizing and cooling the heat exchange fluid; andcompressing the second corrugated liquid storage tank by the second buff pressurizer to squeeze the heat exchange fluid out of the second corrugated liquid storage tank, the heat exchange fluid flowing through the first hot-end heat exchanger, entering the first regenerator for cooling, after the cooling entering the cold-end heat exchanger for the primary heat exchange, after the primary heat exchange entering the second regenerator for heating, after the heating entering the second hot-end heat exchanger for a tertiary heat exchange, and after the tertiary heat exchange entering the first corrugated liquid storage tank.

8. The refrigeration method of the compact room-temperature magnetic refrigerator according to claim 7, wherein with periodic reciprocating movement of the I-shaped magnet, temperature gradients which are low at an upper part and high at a lower part are gradually formed in the first regenerator and the second regenerator, and the heat exchange fluid takes away heat in the cold chamber when flowing through the cold-end heat exchanger to realize refrigeration; and when the high-temperature fluid at the lower part flows through the first hot-end heat exchanger and the second hot-end heat exchanger, the heat is discharged.

9. The refrigeration method of the compact room-temperature magnetic refrigerator according to claim 7, wherein the rotating shaft of the motor drives the hinged disc to rotate, the hinged disc drives the sliding block to reciprocate first and second on the sliding rail through the rocker arm, and the sliding block drives the I-shaped magnet to reciprocate between the first side and the second side, so that the first regenerator reciprocates between the first side and the second side to get in and out of the first magnet opening, and the second regenerator reciprocates first and second to get in and out of the first magnet opening, thus realizing repeated periodic magnetization or demagnetization of the first regenerator and the second regenerator.

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