CN-224230369-U - Room temperature magnetic refrigeration cycle device

CN224230369UCN 224230369 UCN224230369 UCN 224230369UCN-224230369-U

Abstract

The utility model discloses a room temperature magnetic refrigeration cycle device which comprises a magnet group, a magnet group driving device, a double-layer heat regenerator and a heat regenerator driving device, wherein the two sides of the magnet group are symmetrically connected with the magnet group driving device capable of driving the magnet group to reciprocate up and down, a high magnetic field intensity air gap is arranged in the magnet group, the double-layer heat regenerator is matched with the high magnetic field intensity air gap, and the heat regenerator driving device is arranged on the left side of the double-layer heat regenerator and drives the heat regenerator to reciprocate left and right. The room temperature magnetic refrigeration cycle device thoroughly gets rid of heat exchange fluid in the double-layer heat regenerator, realizes unidirectional self-heat regeneration in the double-layer heat regenerator without depending on external elements under a reciprocating structure, and simultaneously realizes gradient distribution of MCM microcell temperature between cold and hot ends through space-time matching design in the double-layer heat regenerator, and effectively improves the refrigerating capacity on the premise of guaranteeing temperature span.

Inventors

HE JING
Huang Xianen
Ya Chunwan

Assignees

南宁师范大学

Dates

Publication Date: 20260512
Application Date: 20250408

Claims (8)

1. The room temperature magnetic refrigeration cycle device is characterized by comprising a magnet group, a magnet group driving device, a double-layer heat regenerator and a heat regenerator driving device, wherein the magnet group driving device capable of driving the magnet group to reciprocate up and down is symmetrically connected to the two sides of the magnet group, a high magnetic field intensity air gap is arranged in the magnet group, the double-layer heat regenerator is matched with the high magnetic field intensity air gap, and the heat regenerator driving device is arranged on the left side of the double-layer heat regenerator and drives the heat regenerator to reciprocate left and right.
2. The room temperature magnetic refrigeration cycle device of claim 1, wherein the magnet assembly is a linear magnet assembly comprising an upper magnet and a lower magnet which are symmetrically arranged, wherein the upper magnet and the lower magnet are formed by combining five magnets with different magnetizing directions, and each magnet is spliced to form a high magnetic field strength air gap.
3. The room temperature magnetic refrigeration cycle device according to claim 1 or 2, wherein the double-layer heat regenerator comprises an upper-layer heat regenerator and a lower-layer heat regenerator, wherein cells of the upper-layer heat regenerator are filled with magnetic heat materials, a cold-end heat exchanger is arranged in a leftmost cell of the lower-layer heat regenerator, a hot-end heat exchanger is arranged in a rightmost cell of the lower-layer heat regenerator, other cells of the lower-layer heat regenerator are filled with magnetic heat materials, and the left side of the upper-layer heat regenerator is connected with a heat regenerator driving device.
4. The room temperature magnetic refrigeration cycle apparatus as set forth in claim 3, wherein the magnetocaloric material has a rectangular block shape.
5. The room temperature magnetic refrigeration cycle apparatus according to claim 3, wherein an upper heat insulating jacket is provided outside the upper regenerator, and a lower heat insulating jacket is provided outside the lower regenerator.
6. The room temperature magnetic refrigeration cycle device of claim 3, further comprising a support frame, an intermediate heat transfer plate and a heat transfer block, wherein the intermediate heat transfer plate is arranged above the support frame, the intermediate heat transfer plate is arranged between the upper layer heat regenerator and the lower layer heat regenerator, the heat transfer block is inlaid in the intermediate heat transfer plate, and the heat regenerator driving device is arranged above the left side of the intermediate heat transfer plate.
7. The room temperature magnetic refrigeration cycle device of claim 6, wherein the array of heat transfer blocks corresponds to a lower regenerator cell layout.
8. The room temperature magnetic refrigeration cycle device according to claim 6, further comprising a bottom plate, wherein the magnet assembly driving device and the support frame are disposed above the bottom plate.

Description

Room temperature magnetic refrigeration cycle device Technical Field The utility model relates to the technical field of refrigeration, in particular to a room temperature magnetic refrigeration cycle device. Background The environment protection, energy saving and water saving become the rigidity requirement of the development of the air conditioning industry in China. At present, the annual output value of the refrigeration air-conditioning industry in China breaks through 6000 hundred million yuan, but the mainstream vapor compression refrigeration technology still depends on a refrigerant taking fluorocarbon (HFC) as a working medium. HFCs present a risk of leakage in the production and use links, and have Global Warming Potential (GWP) values generally higher than 1000, contributing significantly to the greenhouse effect. To address this challenge, the "montreal protocol" basic calix amendment in 2019 was in force to cut HFCs consumption. However, the research and development of alternative refrigerants face multiple constraints that the fluoroalkanes and olefin materials need to balance flammability, high GWP and toxicity, and natural working media (such as ammonia and carbon dioxide) have potential safety hazards. In this context, the development of new climate friendly refrigeration technologies with zero GWP is becoming an urgent need. Magnetic refrigeration technology is based on the magnetocaloric effect of magnetocaloric materials (MCM), which are regarded as an important direction to replace HFCs by virtue of zero GWP, high thermodynamic efficiency and fast response characteristics, and common magnetocaloric materials include gallium-based alloys, manganese-based compounds, and the like. At present, room temperature magnetic refrigerators based on active regenerative (AMR) cycles have entered an engineering stage, but their core drawbacks stem from the heat transfer mechanism that relies on heat exchange fluids: (1) Material corrosion and frequency limitation, namely MCM is easy to corrode due to a fluid medium, and the operating frequency of the system is limited by the fluid flow rate; (2) The heat transfer efficiency is insufficient, namely, the heat exchange temperature difference is large and the irreversible loss is high due to the complex flow path and non-ideal contact between the fluid and the MCM; (3) The secondary heat exchange bottleneck is that the temperature span is established and needs to undergo a secondary heat exchange process of MCM-fluid-MCM, so that the energy dissipation is further aggravated. The above problems indicate that the energy efficiency enhancement of the AMR cycle is limited by the convective heat transfer mechanism between the fluid and the MCM. Thus, all-solid-state magnetic refrigeration technology (replacing fluid media by solid-state heat transfer) is a breakthrough direction. The existing research focuses on solid-state enhanced heat transfer structures (such as thermal switches and phase change materials) and novel cycle designs, but still faces two major bottlenecks: (1) Depending on an external thermal control element, the heat regeneration process is realized by a thermoelectric semiconductor or a kH heat pipe, and the complexity and the cost of the system are increased; (2) Temperature span limitation, namely, the actual temperature span is difficult to meet the working condition requirement of an air conditioner (usually, the temperature span is required to be 15K) due to the thermal resistance of a solid heat transfer interface. Disclosure of utility model The utility model aims to provide a room temperature magnetic refrigeration cycle device which can thoroughly get rid of heat exchange fluid in a regenerator, realizes unidirectional self-backheating in the regenerator without depending on an external element under a reciprocating structure, realizes gradient distribution of MCM micro-element lattice temperature between cold and hot ends through space-time matching design in the regenerator, and effectively improves refrigerating capacity on the premise of ensuring temperature span. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The utility model provides a room temperature magnetism refrigeration cycle device, includes magnet group, magnet group drive arrangement, double-deck regenerator and regenerator drive arrangement, the bilateral symmetry of magnet group connects the magnet group drive arrangement that can drive the up-and-down reciprocating motion of magnet group, the inside high magnetic field intensity air gap that is provided with of magnet group, double-deck regenerator with high magnetic field intensity air gap phase-match, regenerator drive arrangement sets up in the left side of double-deck regenerator, drives the left and right reciprocating motion of regenerator. Preferably, the magnet group is a linear type magnet group, the linear type magnet group comprises an upper ma