A green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect

Abstract

The present invention discloses a green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, comprising a magnetic field generating device, a magnetic working fluid, a heat exchange channel and a driving component. The heat exchange channel is divided into multiple sections, namely a heat absorption section, a heat release section and a throttling section. The magnetic working fluid is in the heat exchange channel, the driving component is used to drive the magnetic working fluid to circulate in the heat exchange channel, and the magnetic field generating device is used to generate a magnetic field. The present invention has a reasonable design and a simple principle, and provides a new magnetic refrigeration heat exchange structure, which realizes heat transfer based on the magnetocaloric effect, and further realizes the cooling or heating function. The magnetic working fluid in this embodiment adopts a closed-loop circulation motion, is not easy to be damaged, and has a low maintenance cost. The movement direction of the magnetic working fluid and the flow direction of the medium are counter-convection, the heat exchange efficiency is improved, and the cooling or heating efficiency per unit time is improved.

Description

Technical Field

[0001] The present invention relates to the field of magnetic refrigeration technology, and in particular to a green and environment-friendly magnetic refrigeration heat exchange device based on magnetocaloric effect. Background Art

[0002] With the intensification of the global greenhouse effect, global warming has attracted more and more attention from people, and people are paying more and more attention to environmental protection. Since 1989, the Montreal Protocol has come into effect, and traditional refrigerants based on Freon have been gradually banned because they will destroy the ozone layer and cause the greenhouse effect. New refrigeration technologies with environmental friendliness and high efficiency are developing rapidly, such as semiconductor refrigeration, magnetic refrigeration, electric refrigeration, etc. Magnetic refrigeration technology is a green technology that uses magnetic materials as working fluids and uses the magnetocaloric effect of the material itself to refrigerate. The refrigeration efficiency is as high as 5 to 10 times that of traditional gas refrigeration, which can significantly save energy; and the entropy density of solid-state magnetic refrigeration materials is much greater than that of gases, the refrigerator is small in size, does not require large-scale gas compression movement, and runs smoothly and reliably; more importantly, this technology does not use refrigerants such as Freon and ammonia, and does not pollute the environment. Summary of the invention

[0003] Based on the premise of environmental friendliness, the present invention has developed a green and environmentally friendly magnetic refrigeration heat exchange equipment based on the magnetocaloric effect.

[0004] The specific technical solutions are as follows:

[0005] A green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect, characterized in that it includes a magnetic field generating device, a magnetic working medium, a heat exchange channel and a driving component;

[0006] The heat exchange channel is in a closed loop state connected end to end, and is used for the magnetic medium to circulate therein. It can be divided into multiple sections according to its function, namely, a heat absorption section, a heat release section, and two throttling sections connecting the two ends of the heat absorption section and the heat release section;

[0007] The magnetic working medium is arranged in the heat exchange channel in multiple quantities and arranged in succession, and circulates in the heat exchange channel;

[0008] The driving component is arranged on the heat exchange channel and is used to drive the magnetic medium to circulate in the heat exchange channel;

[0009] The magnetic field generating device is used to generate a magnetic field and is installed outside the heat release section;

[0010] The heat absorbing section is connected to a first medium pipeline, in which a refrigerant medium flows; the heat releasing section is connected to a second medium pipeline, in which a heat absorbing medium flows.

[0011] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein the magnetic working medium is a polygon suitable for moving in the heat exchange channel.

[0012] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein the magnetic working medium is spherical.

[0013] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein a gap is left between the edge of the magnetic working fluid and the inner wall of the heat absorption section or the inner wall of the heat release section for the circulation of the refrigerant medium or the heat absorption medium; the edge of the magnetic working fluid fits with the inner wall of the throttling section without leaving a gap, that is, the cross-section of the magnetic working fluid fits with the cross-section of the channel in the throttling section.

[0014] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein the driving component includes a driving shaft and a driver, one end of the driving shaft extends into the heat exchange channel and is connected to the driving blades, and the other end is located outside the heat exchange channel and is connected to the driver. The driver drives the driving shaft to rotate, thereby controlling the rotation of the driving blades, so that the magnetic working medium circulates in the heat exchange channel.

[0015] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein the flow direction of the refrigerant medium in the heat absorption section is opposite to the movement direction of the magnetic working fluid in the heat absorption section; the flow direction of the heat absorption medium in the heat release section is opposite to the movement direction of the magnetic working fluid in the heat release section.

[0016] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect, wherein the working method of the green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect is as follows:

[0017] (1) starting the magnetic field generating device and the driving assembly to generate an external magnetic field at the heat release section and to cause the magnetic medium to circulate in the heat exchange channel;

[0018] (2) When the magnetic medium moves to the external magnetic field, under the action of the external magnetic field, the magnetic moment order is enhanced, the magnetic entropy is reduced, and heat is released. At this time, the heat absorbing medium circulating in the heat release section continuously absorbs and takes away the heat released by the magnetic medium;

[0019] (3) When the magnetic medium leaves the heat release section and enters the heat absorption section through the throttling section, the magnetic medium leaves the external magnetic field, the magnetic moment order decreases, and heat is absorbed. At this time, the heat of the refrigerant flowing in the heat absorption section continuously absorbs and takes away the magnetic medium.

[0020] (4) As the magnetic working fluid circulates, the heat of the refrigerant is continuously transferred to the magnetic working fluid in the heat absorption section, and then carried to the heat release section by the magnetic working fluid, where it is absorbed and carried away by the heat absorption medium flowing in the heat absorption section.

[0021] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein a pump and a valve are installed on the first medium pipeline and the second medium pipeline.

[0022] The above-mentioned green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, wherein the first medium pipeline is connected to a refrigeration device, and the second medium pipeline is connected to a heat dissipation device.

[0023] The beneficial effects of the present invention are:

[0024] The present invention discloses a green and environmentally friendly magnetic refrigeration heat exchange equipment based on magnetocaloric effect, comprising a magnetic field generating device, a magnetic working fluid, a heat exchange channel and a driving component. The heat exchange channel is divided into multiple sections, namely a heat absorption section, a heat release section and a throttling section. The magnetic working fluid is in the heat exchange channel, the driving component is used to drive the magnetic working fluid to circulate in the heat exchange channel, and the magnetic field generating device is used to generate a magnetic field. The present invention has a reasonable design and a simple principle, and provides a new magnetic refrigeration heat exchange structure, which realizes heat transfer based on the magnetocaloric effect, and further realizes the cooling or heating function. The magnetic working fluid in this embodiment adopts a closed-loop circulation motion, is not easy to be damaged, and has a low maintenance cost. The movement direction of the magnetic working fluid and the flow direction of the medium are counter-convection, the heat exchange efficiency is improved, and the cooling or heating efficiency per unit time is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the present invention.

[0026] Figure 2 It is a three-dimensional diagram of the heat exchange channel and drive components.

[0027] Figure 3 This is the front view of the heat exchange channel and drive assembly.

[0028] Figure 4 This is a schematic diagram of the interior of the heat release section.

[0029] Figure 5 for Figure 3 Middle, cross-section view in AA direction.

[0030] Figure 6 for Figure 3 Middle, cross-section view along BB direction.

[0031] Figure 7 A schematic diagram of the drive components. DETAILED DESCRIPTION

[0032] In order to make the technical solution of the present invention clearer and more specific, the present invention is further described below in conjunction with embodiments. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived by conventional reasoning shall fall within the protection scope of the present invention.

[0033] Embodiment 1

[0034] A green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect in this embodiment is characterized by comprising a magnetic field generating device 1, a magnetic working medium 2, a heat exchange channel 3 and a driving component 4;

[0035] The heat exchange channel 3 is in a closed loop state connected end to end, and is used for the magnetic medium 2 to circulate therein. It can be divided into multiple sections according to its function, namely a heat absorption section 31, a heat release section 32, and two throttling sections 33 connecting the two ends of the heat absorption section 31 and the heat release section 32;

[0036] The magnetic medium 2 is disposed in the heat exchange channel 3, the number of which is multiple and arranged continuously, and circulates in the heat exchange channel 3;

[0037] The driving component 4 is arranged on the heat exchange channel 3 and is used to drive the magnetic medium 2 to circulate in the heat exchange channel 3;

[0038] The magnetic field generating device 1 is used to generate a magnetic field and is installed outside the heat release section 32;

[0039] The heat absorbing section 31 is connected to a first medium pipeline 5, in which a refrigerant medium flows; the heat releasing section 32 is connected to a second medium pipeline 6, in which a heat absorbing medium flows;

[0040] Wherein, the magnetic medium 2 is a polygon suitable for moving in the heat exchange channel 3, or the magnetic medium 2 is spherical;

[0041] Take the spherical magnetic medium 2 as an example;

[0042] There is a gap between the edge of the magnetic medium 2 and the inner wall of the heat absorbing section 31 or the inner wall of the heat releasing section 32 for the circulation of the refrigerant or the heat absorbing medium, so as to facilitate the transfer of heat; the edge of the magnetic medium 2 fits with the inner wall of the throttling section 33 without leaving a gap, that is, the cross section of the magnetic medium 2 fits with the cross section of the channel in the throttling section 33, so that the heat absorbing section and the heat releasing section are not connected;

[0043] The driving assembly 4 includes a driving shaft 41 and a driver 42. One end of the driving shaft 41 extends into the heat exchange channel 3 and is connected to the driving blades. The other end of the driving shaft 41 is located outside the heat exchange channel 3 and is connected to the driver 42. The driver 42 drives the driving shaft 41 to rotate, thereby controlling the driving blades to rotate 43, so that the magnetic medium 2 circulates in the heat exchange channel 3.

[0044] The flow direction of the refrigerant in the heat absorption section 31 is opposite to the movement direction of the magnetic medium 2 in the heat absorption section 31; the flow direction of the heat absorption medium in the heat release section 32 is opposite to the movement direction of the magnetic medium 2 in the heat release section 32;

[0045] In order to control the circulation state of the refrigerant medium and the heat absorbing medium, a pump and a valve are installed on the first medium pipeline and the second medium pipeline; at the same time, a refrigeration device is connected to the first medium pipeline, and the refrigeration device performs cooling through the refrigerant medium circulating in the first medium pipeline; a heat dissipation device is connected to the second medium pipeline, and the heat dissipation device performs heating through the heat absorbing medium circulating in the second medium pipeline, or dissipates the heat of the heat absorbing medium in the second medium pipeline, so as to facilitate the circulation of heat absorption;

[0046] The present embodiment discloses a green and environmentally friendly magnetic refrigeration heat exchange device based on the magnetocaloric effect, which provides a new magnetic refrigeration heat exchange structure, realizes heat transfer based on the magnetocaloric effect, and further realizes the cooling or heating function. The magnetic working fluid of the present embodiment adopts a closed-loop circulation motion, which is not easy to be damaged and has a low maintenance cost. The movement direction of the magnetic working fluid and the flow direction of the medium are counter-convection, the heat exchange efficiency is improved, and the cooling or heating efficiency per unit time is improved.

[0047] Embodiment 2

[0048] The present embodiment is a green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect, wherein the working method of the green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect is as follows:

[0049] (1) starting the magnetic field generating device and the driving assembly to generate an external magnetic field at the heat release section and to cause the magnetic medium to circulate in the heat exchange channel;

[0050] (2) When the magnetic medium moves to the external magnetic field, under the action of the external magnetic field, the magnetic moment order is enhanced, the magnetic entropy is reduced, and heat is released. At this time, the heat absorbing medium circulating in the heat release section continuously absorbs and takes away the heat released by the magnetic medium;

[0051] (3) When the magnetic medium leaves the heat release section and enters the heat absorption section through the throttling section, the magnetic medium leaves the external magnetic field, the magnetic moment order decreases, and heat is absorbed. At this time, the heat of the refrigerant flowing in the heat absorption section continuously absorbs and takes away the magnetic medium.

[0052] (4) As the magnetic medium circulates, the heat of the refrigerant is continuously transferred to the magnetic medium in the heat absorption section, and then carried to the heat release section by the magnetic medium, where it is absorbed and carried away by the heat absorption medium flowing in the heat absorption section;

[0053] When used for heating, the second medium pipeline connected to the heat release section is introduced into the room to transfer the heat emitted by the magnetic working fluid into the room; when used for cooling, the first medium pipeline connected to the heat absorption section is introduced into the room, the heat of the refrigerant continuously absorbs and takes away the magnetic working fluid, and continuously discharges the indoor heat.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A heat exchange method for a green and environmentally friendly magnetic refrigeration heat exchange device based on magnetocaloric effect, characterized in that: The green and environmentally friendly magnetic refrigeration heat exchange equipment includes a magnetic field generating device, a magnetic working medium, a heat exchange channel and a driving component; The heat exchange channel is in a closed loop state connected end to end, and is used for the magnetic medium to circulate therein. It can be divided into multiple sections according to its function, namely a heat absorption section, a heat release section, and two throttling sections connecting the two ends of the heat absorption section and the heat release section; The magnetic working medium is arranged in the heat exchange channel in multiple quantities and arranged in succession, and circulates in the heat exchange channel; The driving component is arranged on the heat exchange channel and is used to drive the magnetic medium to circulate in the heat exchange channel; The magnetic field generating device is used to generate a magnetic field and is installed outside the heat release section; The heat absorbing section is connected to a first medium pipeline, in which a refrigerant medium flows; the heat releasing section is connected to a second medium pipeline, in which a heat absorbing medium flows; and the magnetic working medium is spherical; Among them, a gap is left between the edge of the magnetic working medium and the inner wall of the heat absorption section or the inner wall of the heat release section for the circulation of the refrigerant or the heat absorption medium; the edge of the magnetic working medium fits with the inner wall of the throttling section without leaving a gap, that is, the cross section of the magnetic working medium fits with the cross section of the channel in the throttling section, the driving component includes a driving shaft and a driver, one end of the driving shaft extends into the heat exchange channel and is connected to the driving blade, and the other end is located outside the heat exchange channel and is connected to the driver, the driver drives the driving shaft to rotate, and then controls the driving blade to rotate, so that the magnetic working medium circulates in the heat exchange channel, the flow direction of the refrigerant in the heat absorption section is opposite to the movement direction of the magnetic working medium in the heat absorption section; the flow direction of the heat absorption medium in the heat release section is opposite to the movement direction of the magnetic working medium in the heat release section; A pump and a valve are installed on the first medium pipeline and the second medium pipeline; The first medium pipeline is connected to a refrigeration device, and the second medium pipeline is connected to a heat dissipation device; The heat exchange method of green and environmentally friendly magnetic refrigeration heat exchange equipment is as follows: (1) starting the magnetic field generating device and the driving assembly to generate an external magnetic field at the heat release section and to cause the magnetic medium to circulate in the heat exchange channel; (2) When the magnetic medium moves to the external magnetic field, under the action of the external magnetic field, the magnetic moment order is enhanced, the magnetic entropy is reduced, and heat is released. At this time, the heat absorbing medium circulating in the heat release section continuously absorbs and takes away the heat released by the magnetic medium; (3) When the magnetic medium leaves the heat release section and enters the heat absorption section through the throttling section, the magnetic medium leaves the external magnetic field, the magnetic moment order decreases, and heat is absorbed. At this time, the heat of the refrigerant flowing in the heat absorption section continuously absorbs and takes away the magnetic medium. (4) As the magnetic working fluid circulates, the heat of the refrigerant is continuously transferred to the magnetic working fluid in the heat absorption section, and then carried to the heat release section by the magnetic working fluid, where it is absorbed and carried away by the heat absorption medium flowing in the heat absorption section.

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