A magnetocaloric intermittent refrigeration device

Abstract

The utility model relates to a kind of magnetic heat intermittent refrigeration device, belong to refrigeration technical field, solve the performance insufficient problem of existing magnetic heat refrigeration equipment.The utility model provides a kind of magnetic heat intermittent refrigeration device, including power component, intermittent transmission component, magnetic field modulator and heat exchange component, wherein: intermittent transmission component is groove wheel transmission mechanism, including driving dial and driven groove wheel, driving dial is connected with the output shaft key of power component;Magnetic field modulator includes inner magnetic cylinder and outer magnetic cylinder, inner magnetic cylinder is coaxially sleeved in the inside of outer magnetic cylinder, annular magnetic field cavity is formed between inner magnetic cylinder and outer magnetic cylinder, and inner magnetic cylinder is fixedly connected with the driven groove wheel of groove wheel transmission mechanism;Heat exchange component is installed in annular magnetic field cavity, heat exchange component is built-in magnetic heat medium, and magnetic heat medium exchanges heat with external heat exchange system.The utility model can be used for magnetic control cold equipment.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, specifically to a magnetocaloric intermittent refrigeration device. Background Technology

[0002] Magnetothermic refrigeration technology, as an important development direction for environmentally friendly refrigeration technology, utilizes the magnetocaloric effect—the release or absorption of heat by a magnetocaloric medium in a changing magnetic field—to achieve refrigeration. In existing rotary magnetocaloric refrigeration equipment, the switching of the magnet's magnetic field is typically achieved through the start-stop control of a drive motor; that is, the motor operates during magnetization and demagnetization, and stops during heat release and absorption. This operating mode causes the motor to frequently experience starting current surges, leading to wear on components such as brushes and windings. Furthermore, sudden torque changes during start-stop processes cause mechanical vibration and noise, affecting equipment stability and user experience.

[0003] Furthermore, traditional magnet components often employ a single-layer magnetic block arrangement, resulting in limited magnetic field strength and superposition effect, leading to low cooling efficiency. The common method of fixing magnetic blocks using bolts not only compromises the structural integrity of the magnets but also easily causes magnetic field leakage. These problems make existing magnetothermal refrigeration equipment unable to meet the reliability, quiet operation, and energy efficiency requirements of consumer appliances, thus limiting its large-scale application. Therefore, optimizing the transmission structure and magnet layout of magnetically controlled refrigeration devices is crucial to solving these problems. Utility Model Content

[0004] This invention provides a magnetothermal intermittent cooling device, which solves the problem of insufficient performance of magnetothermal cooling equipment by optimizing the transmission structure and magnet component design.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A magnetocaloric intermittent refrigeration device includes a power component, an intermittent transmission component, a magnetic field modulator, and a heat exchange component, wherein:

[0007] The intermittent transmission assembly is a grooved wheel transmission mechanism, including a driving wheel and a driven grooved wheel. The driving wheel is keyed to the output shaft of the power assembly, and the driven grooved wheel is fixedly connected to the inner magnetic cylinder of the magnetic field modulator. The driving wheel is provided with a driving pin, and the driven grooved wheel is provided with four positioning slots. For each rotation of the driving wheel, the driving pin drives the driven grooved wheel to rotate 90°.

[0008] The magnetic field modulator includes an inner magnetic cylinder and an outer magnetic cylinder. The inner magnetic cylinder is coaxially sleeved inside the outer magnetic cylinder, and an annular magnetic field cavity is formed between the inner magnetic cylinder and the outer magnetic cylinder.

[0009] The heat exchange assembly is installed inside the annular magnetic field cavity, and the heat exchange assembly contains a magnetic thermal medium.

[0010] Furthermore, the outer edge of the driving wheel is provided with a locking arc surface, and the outer edge of the driven grooved wheel is provided with a mating arc surface adapted to the locking arc surface. When the locking arc surface and the mating arc surface are in contact, the driven grooved wheel remains stationary.

[0011] Furthermore, both the outer wall of the inner magnetic cylinder and the inner wall of the outer magnetic cylinder are provided with magnetic units, which are evenly distributed along the circumference of the inner and outer magnetic cylinders.

[0012] Furthermore, the magnet unit is composed of a sector-shaped prism magnetic block array.

[0013] Furthermore, the magnetic units on both the inner and outer magnetic cylinders are arranged radially as three-layer magnetic block groups, with adjacent magnetic block groups fixed together by an adhesive layer.

[0014] Furthermore, the magnetic block is a rare-earth permanent magnet, and the adhesive layer is made of high-temperature resistant epoxy adhesive.

[0015] Furthermore, the arc length, thickness, and height dimensions of the sector-shaped prism magnetic blocks in the same radial layer are all consistent.

[0016] Furthermore, both the inner magnetic cylinder and the outer magnetic cylinder are made of stainless steel.

[0017] Furthermore, the driven grooved wheel is connected to the inner magnetic cylinder by a key to ensure that the intermittent rotation of the inner magnetic cylinder is synchronized with the driven grooved wheel.

[0018] Furthermore, the heat exchange component adopts a cylindrical structure with an outer diameter adapted to the annular magnetic field cavity, and the built-in magnetothermal medium is a gadolinium-based magnetothermal medium.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The power unit operates continuously, switching the magnetic field through an intermittent transmission component. This avoids current surges and mechanical wear caused by frequent start-stop cycles, extending the motor's lifespan. The locking arc surface design of the intermittent transmission component ensures smooth start-stop of the magnetic field modulator, reducing mechanical vibration and impact noise. The three-layer radial magnetic block design enhances the strength of the alternating composite magnetic field, and the alternating magnetic pole arrangement of the magnetic blocks optimizes the magnetic field distribution, allowing the magnetocaloric medium to fully utilize its magnetocaloric effect, thus improving cooling efficiency. The magnetic field modulator adopts a coaxial nested structure, with the heat exchange component built into it, resulting in a more compact structure. It requires no refrigerants such as Freon, relying on the magnetocaloric effect for cooling, causing no environmental pollution and making it more environmentally friendly. The energy consumption of the power unit operating continuously is lower than that of the frequent start-stop mode, resulting in significant energy savings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the magnetocaloric intermittent refrigeration device;

[0022] Figure 2 This is a schematic diagram of the intermittent transmission assembly.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of a magnetic field modulator.

[0024] Figure label:

[0025] 1-Power assembly; 2-Intermittent transmission assembly; 21-Active dial wheel; 211-Drive pin; 212-Locking arc surface; 22-Driven grooved wheel; 221-Positioning groove; 222-Matching arc surface; 3-Magnetic field modulator; 31-Inner magnetic cylinder; 32-Outer magnetic cylinder; 33-Magnetic block; 4-Heat exchange assembly. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0027] A specific embodiment of this utility model is as follows: Figure 1 As shown, a magnetothermal intermittent refrigeration device is disclosed, including a power component 1, an intermittent transmission component 2, a magnetic field modulator 3, and a heat exchange component 4.

[0028] The power assembly 1 is fixed to the mounting base by bolts, and the output shaft is fixedly connected to the drive wheel 21 of the intermittent transmission assembly 2 to provide power and realize intermittent transmission.

[0029] like Figure 2 As shown, the intermittent transmission assembly 2 is a Geneva mechanism, which includes a driving wheel 21 and a driven Geneva wheel 22. The driving wheel 21 has a driving pin 211 and a locking arc surface 212 on its outer edge; the driven Geneva wheel 22 has four positioning grooves 221 and a mating arc surface 222 on its outer edge. The driving wheel 21 and the driven Geneva wheel 22 are on the same plane, and the power assembly 1 drives the driving wheel 21 to rotate. When the driving wheel 21 rotates, the driving pin 211 engages with the positioning groove 221, causing the driven Geneva wheel 22 to rotate. After the driving pin 211 disengages, the locking arc surface 212 and the mating arc surface 222 engage, and the driven Geneva wheel 22 comes to rest, achieving intermittent rotation with a step size of 90°.

[0030] The driven groove wheel 22 of the intermittent transmission assembly 2 is fixed to the inner magnetic cylinder 31 of the magnetic field modulator 3 by a flat key; the outer magnetic cylinder 32 of the magnetic field modulator 3 is fixed by a bracket, and the inner magnetic cylinder 31 is coaxially sleeved inside the outer magnetic cylinder 32 to form an annular magnetic field cavity, and the heat exchange assembly 4 is installed in the magnetic field cavity.

[0031] like Figure 3As shown, both the inner magnetic cylinder 31 and the outer magnetic cylinder 32 of the magnetic field modulator 3 are made of stainless steel. Three layers of fan-shaped prism magnetic blocks 33 are bonded to the inner wall of the inner magnetic cylinder 31, and three layers of fan-shaped prism magnetic blocks 33 are bonded to the inner wall of the outer magnetic cylinder 32. The fan-shaped prism is a three-dimensional component formed by stretching a "ring-shaped sector" (i.e., a large concentric fan-shaped ring after removing the smaller fan-shaped sectors in the middle) along its axial direction to a certain height. This shape perfectly matches the structural requirements of the nested cylinders, allowing the magnetic blocks to be tightly assembled on the inner walls of the inner magnetic cylinder 31 and the outer magnetic cylinder 32 like building blocks, forming a complete ring-shaped magnetic field. The magnetic blocks 33 are bonded with high-temperature resistant epoxy adhesive, with an adhesive layer thickness of 0.5mm, ensuring a firm fixation.

[0032] The heat exchange assembly 4 adopts a cylindrical structure with an outer diameter adapted to the annular magnetic field cavity. It contains a gadolinium-based magnetothermal medium, and the inlet and outlet are connected to the external heat exchange pipeline via flexible hoses. After the power assembly 1 is started, it drives the active dial wheel 21 to rotate continuously, which in turn drives the driven grooved wheel 22 to rotate intermittently via the drive pin 211. This, in turn, drives the inner magnetic cylinder 31 to rotate, causing the magnetic field formed by the magnetic blocks 33 on the inner magnetic cylinder 31 and the outer magnetic cylinder 32 to change periodically. The magnetothermal medium alternately magnetizes and releases heat and demagnetizes and absorbs heat, thus realizing a refrigeration cycle through the heat exchange assembly 4.

[0033] By applying the technical solution of this utility model, the magnetothermal intermittent refrigeration device achieves stable and periodic switching of the magnetic field state through the cooperation of the power component 1 and the intermittent transmission component 2. The continuous power output of the power component 1 is converted into intermittent power by the intermittent transmission component 2, thereby avoiding the wear and tear problems caused by frequent start-stop of the power component 1 and the noise caused by mechanical vibration. Through the design of the magnetic field modulator 3 of the inner and outer coaxial cylinders, a switchable magnetic field environment is constructed. This structure not only enhances the magnetic field strength but also optimizes the magnetic field distribution, improves the magnetization and demagnetization efficiency of the magnetothermal medium, and thus improves the refrigeration efficiency. The precise cooperation between the heat exchange component 4 and the magnetic field modulator 3 allows the magnetothermal medium to fully release and absorb heat during magnetic field changes, and the effective heat exchange with the external heat exchange system ensures continuous and efficient refrigeration. In summary, the technical solution of this application effectively solves the key problems of rapid wear of drive components, high operating noise, and insufficient refrigeration efficiency in the prior art, and significantly improves the performance and user experience of magnetothermal refrigeration equipment.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetocaloric intermittent refrigeration device, characterized in that, It includes a power assembly (1), an intermittent transmission assembly (2), a magnetic field modulator (3), and a heat exchange assembly (4), wherein: The intermittent transmission assembly (2) is a Geneva wheel transmission mechanism, including a driving wheel (21) and a driven Geneva wheel (22). The driving wheel (21) is keyed to the output shaft of the power assembly (1). The driving wheel (21) is provided with a driving pin (211), and the driven Geneva wheel (22) is provided with four positioning slots (221). For every revolution of the driving wheel (21), the driving pin (211) drives the driven Geneva wheel (22) to rotate 90°. The magnetic field modulator (3) includes an inner magnetic cylinder (31) and an outer magnetic cylinder (32). The inner magnetic cylinder (31) is coaxially sleeved inside the outer magnetic cylinder (32), and an annular magnetic field cavity is formed between the inner magnetic cylinder (31) and the outer magnetic cylinder (32). The driven grooved wheel (22) is fixedly connected to the inner magnetic cylinder (31). The heat exchange component (4) is installed inside the annular magnetic field cavity, and the heat exchange component (4) contains a magnetic thermal medium.

2. The magnetocaloric intermittent refrigeration device according to claim 1, characterized in that, The outer edge of the active dial (21) is provided with a locking arc surface (212), and the outer edge of the driven grooved wheel (22) is provided with a mating arc surface (222) that is adapted to the locking arc surface (212). When the locking arc surface (212) and the mating arc surface (222) are in contact, the driven grooved wheel (22) remains stationary.

3. The magnetocaloric intermittent refrigeration device according to claim 1, characterized in that, The outer wall of the inner magnetic cylinder (31) and the inner wall of the outer magnetic cylinder (32) are both provided with magnetic units, and the magnetic units are evenly distributed along the circumference of the inner magnetic cylinder (31) and the outer magnetic cylinder (32).

4. The magnetocaloric intermittent refrigeration device according to claim 3, characterized in that, The magnet unit is composed of an array of sector-shaped prism magnets (33).

5. The magnetocaloric intermittent refrigeration device according to claim 4, characterized in that, The magnet units on the inner magnetic cylinder (31) and the outer magnetic cylinder (32) are all arranged in a radial direction as three layers of magnetic blocks (33), and adjacent magnetic blocks (33) are fixed together by an adhesive layer.

6. The magnetocaloric intermittent refrigeration device according to claim 5, characterized in that, The magnetic block (33) is a rare earth permanent magnet, and the adhesive layer is made of high-temperature resistant epoxy adhesive.

7. The magnetocaloric intermittent refrigeration device according to claim 6, characterized in that, The arc length, thickness and height dimensions of the sector prism magnetic blocks (33) in the same radial layer are all the same.

8. The magnetocaloric intermittent refrigeration device according to claim 1, characterized in that, Both the inner magnetic cylinder (31) and the outer magnetic cylinder (32) are made of stainless steel.

9. The magnetocaloric intermittent refrigeration device according to claim 1, characterized in that, The driven groove wheel (22) is connected to the inner magnetic cylinder (31) by a key, ensuring that the intermittent rotation of the inner magnetic cylinder (31) is synchronized with the driven groove wheel (22).

10. The magnetocaloric intermittent refrigeration device according to claim 1, characterized in that, The heat exchange component (4) adopts a cylindrical structure with an outer diameter that matches the annular magnetic field cavity, and the built-in magnetothermal medium is a gadolinium-based magnetothermal medium.

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