233 and 234 together.

In the present invention, the first magnetically conductive member 233, the second magnetically conductive member 234, and the magnetically conductive connecting member 235 are configured to prevent the leakage of the magnetic fields of the first and second magnets 231 and 232, i.e., to confine the magnetic fields generated by the first and second magnets 231 and 232. Specifically, the magnetic fields generated by the first and second magnets 231 and 232 are confined inside the drawer container 210, such that the magnetic fields can be applied to the stored objects in the drawer 220 as much as possible. Therefore, the present invention improves the utilization rate of the magnetic fields of the first and second magnets 231 and 232 by providing the first magnetically conductive member 233, the second magnetically conductive member 234 and the magnetically conductive connecting member 235.

Preferably, horizontal projections of the first magnetically conductive member 233 and the first magnet 231 can jointly cover the stored objects in the drawer 220, and horizontal projections of the second magnetically conductive member 234 and the second magnet 232 can also jointly cover the stored objects in the drawer 220, such that the magnetic fields can act on the stored objects in the drawer 220.

Further, the first magnetically conductive member 233, the second magnetically conductive member 234 and the magnetically conductive connecting member 235 can also allow more uniform distribution of the intensity of the magnetic fields, such that the first and second magnets 231 and 232 provide a good magnetic field-based freshness-preservation environment for the stored objects in the drawer 220.

It should be noted that the first magnetically conductive member 233, the second magnetically conductive member 234 and the magnetically conductive connecting member 235 each may be any feasible magnetically conductive member, for example, a silicon steel sheet.

In some embodiments of the present invention, the first and second magnets 231 and 232 of the present invention are optionally each an electromagnetic coil. Further optionally, the first and second magnets 231 and 232 are each a coil made of a wound enameled wire. It can be understood by those skilled in the art that, with respect to wires covered with other insulation layers, the enameled wire has a smaller diameter, making the volume of the electromagnetic coil smaller.

FIG. 6 is a schematic effect diagram of an electromagnetic coil covered with a waterproof layer according to some embodiments of the present invention.

As shown in FIG. 6, the magnetic field fresh-keeping apparatus 200 further includes a waterproof structure 290 configured to protect the magnet assembly 230 from water. Specifically, the waterproof structure 290 includes a waterproof layer 291 covering each of the electromagnetic coils (the first and second magnets 231 and 232). Optionally, the waterproof layer 291 may cover each of the first and second magnets 231 and 232 by dipping, plastic sealing, spraying or other means.

Further, coating enamel of the first and second magnets 231 and 232 is a waterproof paint to stop water at the outer side of the coating enamel and prevent water from coming into contact with the coating enamel, thereby allowing the coating enamel of the first and second magnets 231 and 232 to also act as part of the waterproof structure 290.

Returning and still referring to FIG. 2 and FIG. 3, the magnet mounting cavity 240 includes a first mounting cavity 241 and a second mounting cavity 242. The first mounting cavity 241 is configured for arrangement of the first magnet 231 and the first magnetically conductive member 233, and the second mounting cavity 242 is configured for arrangement of the second magnet 232 and the second magnetically conductive member 234. The first and second installation cavities 241 and 242 are each configured to allow passage of an airflow to cool at least the first and second magnets 231 and 232.

Further, the first mounting cavity 241 is formed between the top cover plate 250 and the top wall of the drawer container 210. Preferably, the first mounting cavity 241 is defined by the top cover plate 250 and the top wall of the drawer container 210 together. The second mounting cavity 242 is formed between the bottom cover plate 260 and the bottom wall of the drawer container 210. Preferably, the second mounting cavity 242 is defined by the bottom cover plate 260 and the top wall of the drawer container 210 together.

Still referring to FIG. 2 and FIG. 3, the first mounting cavity 241 has a first air inlet 2411 and a first air outlet 2412. The first mounting cavity 241 is communicated with the air supply channel 120 by means of the first air inlet 2411, and the first mounting cavity 241 is communicated with the drawer container 210 by means of the first air outlet 2412. Specifically, the first air outlet 2412 is aligned with the front end cover 221 of the drawer 220, such that the first mounting cavity 241 blows cold-blast air towards the front end cover 221 to thus allow the cold-blast air to return to the interior of the drawer 220. Further specifically, the first air outlet 2412 is formed in a frame body 213 at a front end of the drawer container 210.

Still referring to FIG. 2 and FIG. 3, the second mounting cavity 242 has a second air inlet 2421 and a second air outlet 2422. The second mounting cavity 242 is communicated with the air supply channel 120 by means of the second air inlet 2421, and the second mounting cavity 242 is communicated with the drawer container 210 by means of the second air outlet 2422. Specifically, the second air outlet 2422 is formed in the bottom wall of the drawer container 210. The second mounting cavity 242 blows the cold-blast air to the bottom wall of the drawer 220 by means of its second air outlet 2422.

Based on the foregoing description, it can be understood by those skilled in the art that the magnetic field fresh-keeping apparatus 200 of the present invention can prevent the cold-blast air from blowing directly on the stored objects in the drawer 220, thereby avoiding the freezing of the stored objects. Meanwhile, due to the arrangement of the magnet member 230, the magnetic fields generated by the magnet assembly 230 can have a greater impact on the formation of ice crystals in a freezing process, and reduce the freezing temperature of the stored objects. This allows the stored objects to be stored at a lower temperature without freezing. Therefore, the air-cooled refrigeration device and the magnetic field fresh-keeping apparatus 200 of the present invention can effectively prevent the stored objects from being frozen.