阅读说明：本技术 一种基于永磁磁场辅助冷冻的速冻机 (Instant freezer based on auxiliary freezing of permanent magnetic field ) 是由 冷冬梅 邹慧明 张海南 田长青 于 2020-06-19 设计创作，主要内容包括：本发明涉及食品速冻技术领域,公开了一种基于永磁磁场辅助冷冻的速冻机,包括：速冻库,速冻库具有用于对食品速冻的速冻机构；永磁发生装置,永磁发生装置用于产生恒定或变化的永磁磁场,永磁磁场用于分布于食品,并用于与食品相对静止或相对移动；本发明在节约能量的基础上,确保了对食品的速冻效果,克服了现有的技术人员在对食品速冻的认知中,只能通过通电线圈在食品即将发生相变时施加磁场及现有的永磁体所产生的永磁磁场的辐射范围相对较小,难以将该永磁磁场较好地覆盖到食品的偏见。(The invention relates to the technical field of quick freezing of food, and discloses a quick freezer based on permanent magnetic field auxiliary freezing, which comprises: the quick-freezing warehouse is provided with a quick-freezing mechanism for quickly freezing food; the permanent magnet generating device is used for generating a constant or variable permanent magnetic field, and the permanent magnetic field is distributed on the food and is used for being relatively static or relatively moving with the food; the invention ensures the quick-freezing effect of the food on the basis of saving energy, and overcomes the prejudice that the radiation range of the permanent magnetic field generated by the existing permanent magnet is relatively small and the permanent magnetic field is difficult to better cover the food because the magnetic field can only be applied by an electrified coil when the food is about to have phase change in the cognition of the existing technical personnel on the quick-freezing of the food.)

1. The utility model provides a frozen machine of speed based on supplementary freezing of permanent magnetism magnetic field which characterized in that includes:

the quick-freezing warehouse is provided with a quick-freezing mechanism for quickly freezing food;

the permanent magnet generating device is used for generating a constant or variable permanent magnetic field, and the permanent magnetic field is distributed on the food and is used for being relatively static or relatively moving with the food.

2. The instant freezer based on permanent magnetic field assisted freezing of claim 1, further comprising:

the device comprises a continuous conveying device, a quick-freezing warehouse and a control device, wherein one end of the continuous conveying device is positioned at a food inlet of the quick-freezing warehouse, and the other end of the continuous conveying device is positioned at a food outlet of the quick-freezing warehouse;

the permanent magnet generating device is arranged beside the continuous conveying device and/or arranged on a conveying mechanism of the continuous conveying device.

3. The instant freezer based on permanent magnetic field assisted freezing of claim 2, characterized in that the permanent magnetic generator comprises a first permanent magnet array, which is arranged beside the continuous conveyor and arranged along the length direction of the continuous conveyor.

4. The instant freezer based on permanent magnetic field assisted freezing of claim 3, characterized in that the permanent magnetic generator further comprises a second permanent magnet array, the second permanent magnet array is arranged on the conveying mechanism of the continuous conveying device and arranged along the length direction of the continuous conveying device, and the second permanent magnet array corresponds to the first permanent magnet array.

5. The freezer based on permanent magnetic field assisted freezing of claim 2, wherein the continuous conveyor is a belt conveyor, and the belt conveyor is in communication with a speed regulating device for regulating the conveying speed of a conveying belt on the belt conveyor.

6. The instant freezer based on permanent magnetic field assisted freezing of claims 3 to 5, wherein the first permanent magnet array comprises two groups and is oppositely arranged on two sides along the width direction of the continuous conveying device, and the first permanent magnet array comprises a plurality of permanent magnets.

7. The instant freezer based on permanent magnetic field assisted freezing of claim 6, characterized in that the permanent magnets are arranged in sequence with the same magnetic pole orientation or alternatively arranged in sequence with opposite magnetic pole orientation;

the magnetic poles of the permanent magnets correspondingly arranged in the width direction of the continuous conveying device face towards the same direction or opposite directions.

8. The instant freezer based on permanent magnetic field assisted freezing of claim 6, characterized in that the cross section of the permanent magnet is linear, and the permanent magnet is vertically arranged at one side in the width direction of the continuous conveying device.

9. The freezer based on permanent magnetic field assisted freezing of claim 8, wherein the permanent magnet has a middle part horizontally opposite to one side in the width direction of the continuous conveyer, and one magnetic pole of the permanent magnet is located at the upper side of the continuous conveyer and the other magnetic pole is located at the lower side of the continuous conveyer.

10. The instant freezer based on permanent magnetic field assisted freezing of claim 6, characterized in that the cross section of the permanent magnet is arc-shaped;

one magnetic pole of the permanent magnet is horizontally opposite to one side edge along the width direction of the continuous conveying device, and the other magnetic pole of the permanent magnet extends to the upper side of the continuous conveying device and inclines towards the inner side of the continuous conveying device, or the other magnetic pole of the permanent magnet extends to the lower side of the continuous conveying device and inclines towards the inner side of the continuous conveying device;

or the middle part of the permanent magnet is horizontally opposite to one side edge along the width direction of the continuous conveying device, one magnetic pole of the permanent magnet extends to the upper side of the continuous conveying device and inclines towards the inner side of the continuous conveying device, and the other magnetic pole extends to the lower side of the continuous conveying device and inclines towards the inner side of the continuous conveying device.

Technical Field

The invention relates to the technical field of quick freezing of food, in particular to a quick freezer based on permanent magnetic field auxiliary freezing.

Background

Freezing is a common food preservation method, and the temperature of food is reduced to below-18 ℃, so that various biochemical reactions are inhibited, the food is prevented from going bad, and the shelf life is prolonged. During the freezing process, the moisture in the food is changed from liquid state to solid state at about 0 ℃, thereby causing certain damage to the quality of the food. To reduce this damage, mechanical damage to the internal structure of the food product is typically reduced by increasing the freezing rate to reduce the ice crystal size, but this often requires higher energy consumption.

With the continuous emergence of new refrigeration technology, the food is subjected to micro-processing by applying the non-thermal effect of a magnetic field and combining a food processing technology, so that the original color, flavor and nutrition are kept, and the method becomes a new interdisciplinary field. Based on the added magnetic field, the generation rate of ice nuclei can be increased, so that ice crystals formed in the quick-freezing process of the food are fine and uniformly distributed, and the quick-freezing quality of the food can be greatly improved.

However, when food is frozen quickly, a constant or alternating magnetic field is generated by a current coil, and maintaining the magnetic field not only requires continuous power input, but also generates more heat, which accordingly reduces the refrigeration effect of the food. Compared with an electrified coil, the conventional permanent magnet can generate a magnetic field without being electrified, but the permanent magnet also has the problems of uncontrollable magnetic field energy and relatively small magnetic field radiation range.

Therefore, when the food is quick-frozen by the prior art, in order to save energy, the magnetic field is usually started when the moisture in the food is about to change phase, so that the food is placed in the magnetic field environment, and the magnetic field is closed when the temperature of the food is lower than a preset value. However, the prior art does not recognize that the time of the phase change of the moisture in the food is not a necessary condition for applying a magnetic field to the food when the food is quick-frozen, but the magnetic field can be applied to the food in the whole quick-freezing process of the food, and the permanent magnetic field is difficult to cover the pre-quick-frozen food due to the relatively small radiation range of the permanent magnetic field generated by the permanent magnet, so that the prior art does not recognize the improvement of the quick-freezing effect of the food by the permanent magnetic field in practical application based on these recognition or technical prejudices.

Disclosure of Invention

The embodiment of the invention provides a quick freezer based on permanent magnetic field assisted freezing, which is used for solving the problem that the effect of improving quick freezing of food by a permanent magnetic field in practical application is not realized due to cognition or technical bias of technicians in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a quick freezer based on permanent magnetic field assisted freezing, including: the quick-freezing warehouse is provided with a quick-freezing mechanism for quickly freezing food; the permanent magnet generating device is used for generating a constant or variable permanent magnetic field, and the permanent magnetic field is distributed on the food and is used for being relatively static or relatively moving with the food.

Wherein, still include: the device comprises a continuous conveying device, a quick-freezing warehouse and a control device, wherein one end of the continuous conveying device is positioned at a food inlet of the quick-freezing warehouse, and the other end of the continuous conveying device is positioned at a food outlet of the quick-freezing warehouse; the permanent magnet generating device is arranged beside the continuous conveying device and/or arranged on a conveying mechanism of the continuous conveying device.

The permanent magnet generating device comprises a first permanent magnet array, wherein the first permanent magnet array is arranged beside the continuous conveying device and is distributed along the length direction of the continuous conveying device.

The permanent magnet generating device further comprises a second permanent magnet array, the second permanent magnet array is arranged on the conveying mechanism of the continuous conveying device and is distributed along the length direction of the continuous conveying device, and the second permanent magnet array corresponds to the first permanent magnet array.

The continuous conveying device is a belt conveyor, the belt conveyor is in communication connection with a speed regulating device, and the speed regulating device is used for regulating the conveying speed of a conveying belt on the belt conveyor.

The first permanent magnet array is provided with two groups and is oppositely arranged on two sides of the width direction of the continuous conveying device, and the first permanent magnet array comprises a plurality of permanent magnets.

The permanent magnets are sequentially arranged in the same magnetic pole orientation, or alternatively arranged in the opposite magnetic pole orientation; the magnetic poles of the permanent magnets correspondingly arranged in the width direction of the continuous conveying device face towards the same direction or opposite directions.

The cross section of the permanent magnet is linear, and the permanent magnet is vertically arranged on one side in the width direction of the continuous conveying device.

The middle part of the permanent magnet is horizontally opposite to one side edge in the width direction of the continuous conveying device, one magnetic pole of the permanent magnet is positioned on the upper side of the continuous conveying device, and the other magnetic pole of the permanent magnet is positioned on the lower side of the continuous conveying device.

The cross section of the permanent magnet is arc-shaped; one magnetic pole of the permanent magnet is horizontally opposite to one side edge along the width direction of the continuous conveying device, and the other magnetic pole of the permanent magnet extends to the upper side of the continuous conveying device and inclines towards the inner side of the continuous conveying device, or the other magnetic pole of the permanent magnet extends to the lower side of the continuous conveying device and inclines towards the inner side of the continuous conveying device; or the middle part of the permanent magnet is horizontally opposite to one side edge along the width direction of the continuous conveying device, one magnetic pole of the permanent magnet extends to the upper side of the continuous conveying device and inclines towards the inner side of the continuous conveying device, and the other magnetic pole extends to the lower side of the continuous conveying device and inclines towards the inner side of the continuous conveying device.

One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

according to the instant freezer based on the permanent magnetic field auxiliary freezing provided by the embodiment of the invention, in the process of quick freezing of foods in a quick freezing warehouse, a permanent magnetic field which is constant or variable is applied around the foods by the permanent magnetic generating device, so that the freezing rate of the foods is greatly improved, the size of ice crystals formed in the process of freezing the foods is reduced, and the quality of the quick-frozen foods is improved. For the permanent magnet generating device generating the permanent magnetic field, no external power is needed during working, and no heat is generated, so that the energy is greatly saved. Meanwhile, in the process of quick-freezing the food, a permanent magnetic field which is relatively static with the food can be applied to the food to ensure that the whole quick-freezing process of the food is in the environment of the permanent magnetic field, and the area where the food is located can be completely covered by the permanent magnetic field when the moisture in the food is about to change phase based on the relative movement of the permanent magnetic field and the food, so that the effect of quick-freezing the food is improved.

Therefore, on the basis of energy saving, the quick-freezing effect on the food is ensured, and the prejudice that the radiation range of a magnetic field applied when the food is about to undergo phase change only through the electrified coil and the radiation range of a permanent magnetic field generated by the conventional permanent magnet are relatively small and the permanent magnetic field is difficult to better cover the food in the cognition of quick freezing of the food by the prior art is overcome.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a permanent magnetic field assisted freezing-based instant freezer according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first arrangement of a first permanent magnet array beside a continuous conveyor according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a second arrangement of the first permanent magnet array beside the continuous conveying device according to the embodiment of the present invention;

FIG. 4 is a schematic view of a third arrangement of the first permanent magnet array beside the continuous conveyor according to the embodiment of the present invention;

FIG. 5 is a schematic view of a fourth arrangement of the first permanent magnet array beside the continuous conveyor according to the embodiment of the present invention;

fig. 6 is a schematic view showing a first arrangement of permanent magnets on both sides in the width direction of the continuous conveyor according to the embodiment of the present invention;

fig. 7 is a schematic view showing a second arrangement of permanent magnets on both sides in the width direction of the continuous conveyor according to the embodiment of the present invention;

fig. 8 is a schematic view showing a third arrangement of permanent magnets on both sides in the width direction of the continuous conveyor according to the embodiment of the present invention;

fig. 9 is a schematic view showing a fourth arrangement of permanent magnets on both sides in the width direction of the continuous conveyor according to the embodiment of the present invention;

fig. 10 is a schematic view of an arrangement structure of permanent magnets on both sides in the width direction of the continuous conveyor and permanent magnets provided on the conveyor mechanism of the continuous conveyor according to the embodiment of the present invention.

In the figure, 1, a quick-freezing warehouse; 2. a continuous conveying device; 3. a first array of permanent magnets; 4. a second array of permanent magnets.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present embodiment provides a freezer based on permanent magnetic field assisted freezing, including: the quick-freezing warehouse 1 is provided with a quick-freezing mechanism for quickly freezing food; the permanent magnet generating device is used for generating a constant or variable permanent magnetic field, and the permanent magnetic field is distributed on the food and is used for being relatively static or relatively moving with the food.

Specifically, in the instant freezer shown in this embodiment, in the process of quick-freezing the food in the quick-freezing warehouse 1, the permanent magnetic field which is constant or variable is applied around the food by the permanent magnetic generator, so as to greatly increase the freezing rate of the food, reduce the size of ice crystals formed in the process of freezing the food, and improve the quality of the quick-frozen food. For the permanent magnet generating device generating the permanent magnetic field, no external power is needed during working, and no heat is generated, so that the energy is greatly saved. Meanwhile, in the process of quick-freezing the food, a permanent magnetic field which is relatively static with the food can be applied to the food to ensure that the whole quick-freezing process of the food is in the environment of the permanent magnetic field, and the area where the food is located can be completely covered by the permanent magnetic field when the moisture in the food is about to change phase based on the relative movement of the permanent magnetic field and the food, so that the effect of quick-freezing the food is improved.

Therefore, on the basis of energy saving, the quick-freezing effect on the food is ensured, and the prejudice that the radiation range of a magnetic field applied when the food is about to undergo phase change only through the electrified coil and the radiation range of a permanent magnetic field generated by the conventional permanent magnet are relatively small and the permanent magnetic field is difficult to better cover the food in the cognition of quick freezing of the food by the prior art is overcome.

It should be noted that the permanent magnet generator may include a plurality of permanent magnets known in the art, the permanent magnets include N poles and S poles, and the respective permanent magnets of the permanent magnet generator may be arranged in an array or in a ring, so long as the permanent magnetic field generated by the permanent magnet generator can fully cover the pre-frozen food, and at the same time, when there is no relative movement between the respective permanent magnets of the permanent magnet generator, the permanent magnet generator may generate a constant permanent magnetic field distributed in the food, and when there is relative movement between the respective permanent magnets of the permanent magnet generator, the permanent magnet generator may generate a varying permanent magnetic field distributed in the food.

In addition, the permanent magnetic field shown in the embodiment is relatively static with food, and it can be understood that the arrangement position of the permanent magnetic generating device and the food is relatively static and unchanged, and the permanent magnetic field generated by the permanent magnetic generating device is ensured to be distributed in the area where the food is located; accordingly, the permanent magnetic field generated by the permanent magnetic generating device is partially or completely covered on the food when the permanent magnetic generating device is close to the food, and is separated from the food when the permanent magnetic generating device is far from the food.

Preferably, this embodiment further includes: one end of the continuous conveying device 2 is positioned at a food inlet of the quick-freezing warehouse 1, and the other end of the continuous conveying device 2 is positioned at a food outlet of the quick-freezing warehouse 1; the permanent magnet generator is arranged beside the continuous conveyor 2 and/or on the conveyor mechanism of the continuous conveyor 2.

Specifically, in the actual design, in order to facilitate the food to be transported into the quick-freezing warehouse 1 for quick-freezing, the present embodiment designs a continuous transporting device 2 for transporting the food, and the continuous transporting device 2 may be a belt conveyor, a chain scraper conveyor, or the like, which are well known in the art. Therefore, when the permanent magnet generating device is independently arranged at the side of the continuous conveying device 2, the food conveyed on the conveying mechanism of the continuous conveying device 2 and the constant permanent magnetic field generated by the permanent magnet generating device can move relatively, and when the permanent magnet generating device is independently arranged on the conveying mechanism of the continuous conveying device 2, the food conveyed on the conveying mechanism and the constant permanent magnetic field generated by the corresponding permanent magnet generating device are relatively static, and when the permanent magnet generating device is arranged at the side of the continuous conveying device 2 and the conveying mechanism thereof, the food can be placed in a changing magnetic field environment based on the relative movement between the permanent magnet generating devices, so that the quick-freezing quality of the food can be better improved, and the quick-freezing requirements on different foods can be met.

Meanwhile, when the continuous conveying device 2 shown in the embodiment is preferably a belt conveyor, the belt conveyor can be connected with a speed regulating device in a communication manner, the speed regulating device can be a frequency converter known in the art, the output end of the frequency converter is connected with a driving motor corresponding to a conveying belt of the belt conveyor, and the conveying speed of the conveying belt on the belt conveyor is regulated and controlled based on the regulation of the rotating speed of the driving motor, so that the time when food enters a magnetic field environment and the time when the food is in the magnetic field environment can be changed without changing the arrangement of the permanent magnet generating devices.

Based on the further improvement of the above embodiment, the permanent magnet generating device in this embodiment includes the first permanent magnet array 3, and the first permanent magnet array 3 is disposed beside the continuous conveying device 2 and arranged along the length direction of the continuous conveying device 2. Here, first permanent magnet array 3 can be a plurality of permanent magnets and arrange along continuous conveyor 2's length direction and be the single file, and this first permanent magnet array 3 can set up the multiunit to can arrange respectively at continuous conveyor 2's side along circumference.

Further, as shown in fig. 1 and 10, the permanent magnet generating device in this embodiment further includes a second permanent magnet array 4, the second permanent magnet array 4 is disposed on the conveying mechanism of the continuous conveying device 2 and is arranged along the length direction of the continuous conveying device 2, and the second permanent magnet array 4 corresponds to the first permanent magnet array 3. Here, the second permanent magnet array 4 may also adopt a plurality of permanent magnets arranged in a single row along the length direction of the continuous conveying device 2, and the number of the permanent magnets specifically arranged may be the same as or different from that of the first permanent magnet array 3. When the continuous conveying device 2 starts conveying food, the second permanent magnet array 4 moves along with the conveying mechanism, namely the second permanent magnet array 4 and the food placed on the conveying mechanism keep relatively static, but each permanent magnet corresponding to the second permanent magnet array 4 interacts with each permanent magnet of the first permanent magnet array 3 in the moving process, so that the food is placed in a variable magnetic field environment in the conveying process, the quick-freezing quality of the food can be better improved, and the quick-freezing requirements of different foods are met.

In a first preferred embodiment, as shown in fig. 2, the first permanent magnet arrays 3 are provided in two sets and are oppositely disposed on both sides in the width direction of the continuous conveying device 2, where the first permanent magnet arrays 3 may be specifically mounted on the fixing frames on both sides of the continuous conveying device 2 in the width direction thereof. The corresponding permanent magnet of two sets of first permanent magnet arrays 3 uses the same magnetic pole orientation to arrange in proper order, for example, when the permanent magnet all is vertical arrangement, the magnetic pole orientation of permanent magnet does, and the upper end of permanent magnet is the N utmost point, and the lower extreme is the S utmost point.

In a second preferred embodiment, as shown in fig. 3, the first permanent magnet arrays 3 are provided in two sets, and are oppositely disposed on two sides along the width direction of the continuous conveying device 2, wherein the corresponding permanent magnets of one set of the first permanent magnet arrays 3 are arranged in sequence with the same magnetic pole orientation, for example: the permanent magnets corresponding to the first permanent magnet array 3 are vertically arranged, the magnetic poles of the permanent magnets face to the direction, the upper ends of the permanent magnets are N poles, and the lower ends of the permanent magnets are S poles; correspondingly, the corresponding permanent magnets of another group of first permanent magnet arrays 3 are also arranged in sequence in the same magnetic pole orientation, the corresponding permanent magnets of the first permanent magnet arrays 3 are all vertically arranged, but the magnetic pole orientation of the permanent magnets is that the upper ends of the permanent magnets are S poles, and the lower ends of the permanent magnets are N poles.

In a third preferred embodiment, as shown in fig. 4, two groups of first permanent magnet arrays 3 are provided and are oppositely disposed on two sides along the width direction of the continuous conveying device 2, the corresponding permanent magnets of the two groups of first permanent magnet arrays 3 are alternately arranged in sequence with opposite magnetic pole orientations, and the magnetic pole orientations of the permanent magnets correspondingly arranged along the width direction of the continuous conveying device 2 are the same.

In a fourth preferred embodiment, as shown in fig. 5, two groups of first permanent magnet arrays 3 are provided and are oppositely disposed on two sides along the width direction of the continuous conveying device 2, the corresponding permanent magnets of the two groups of first permanent magnet arrays 3 are alternately arranged in sequence with opposite magnetic pole orientations, and the magnetic pole orientations of the permanent magnets correspondingly arranged along the width direction of the continuous conveying device 2 are opposite.

Based on the further improvement of the above embodiment, since the permanent magnet is generally block-shaped, the present embodiment may further provide that the permanent magnet has a linear cross section and is vertically disposed on one side in the width direction of the continuous conveying device 2. Because two sets of first permanent magnet arrays 3 are located the both sides along continuous conveyor 2's width direction relatively branch to the permanent magnet that corresponds the arrangement along continuous conveyor 2's width direction is parallel relative arrangement, and this is favorable to the better radiation of permanent magnet magnetic field that the permanent magnet produced to the region at conveying mechanism place on continuous conveyor 2, so that supplementary food carries out the quick-freeze.

Further, as shown in fig. 6, in order to effectively expand the radiation range of the permanent magnetic field, the present embodiment may provide that the middle portion of the permanent magnet is horizontally opposite to one side edge in the width direction of the continuous conveying device 2, and one magnetic pole of the permanent magnet is located on the upper side of the continuous conveying device 2 and the other magnetic pole is located on the lower side of the continuous conveying device 2.

Based on the further improvement of the above embodiment, in order to effectively expand the radiation range of the permanent magnetic field, the present embodiment may further include permanent magnets whose cross sections are arc-shaped and are symmetrically arranged along both sides of the continuous conveying device 2 in the width direction.

As shown in fig. 7, in one embodiment, the central portion of the permanent magnet may be horizontally opposed to one side edge in the width direction of the continuous conveyor 2, one magnetic pole of the permanent magnet may be extended to the upper side of the continuous conveyor 2 and inclined toward the inside thereof, and the other magnetic pole may be extended to the lower side of the continuous conveyor 2 and inclined toward the inside thereof. It should be noted here that the inclination toward the inner side thereof may be specifically indicated as an inclination toward an axisymmetric plane of the continuous conveyor 2 in the longitudinal direction.

In another embodiment, as shown in fig. 8, one magnetic pole of the permanent magnet may be horizontally opposed to one side edge in the width direction of the continuous conveyor 2, and the other magnetic pole of the permanent magnet may be extended to the lower side of the continuous conveyor 2 and inclined toward the inner side thereof. As shown in fig. 9, when one magnetic pole of the permanent magnet is horizontally opposed to one side in the width direction of the continuous conveyer 2, the other magnetic pole of the permanent magnet may be extended to the upper side of the continuous conveyer 2 and inclined toward the inner side thereof.

In still another embodiment, based on a further improvement of the scheme shown in fig. 6, as shown in fig. 10, the permanent magnets corresponding to the second permanent magnet array 4 may be disposed on the conveying mechanism of the continuous conveying device 2 and along the length direction of the continuous conveying device 2, and the second permanent magnet array 4 corresponds to the first permanent magnet array 3. Therefore, when the continuous conveying device 2 starts conveying food, the second permanent magnet array 4 can move along with the conveying mechanism of the continuous conveying device 2, and each permanent magnet corresponding to the second permanent magnet array 4 can interact with each permanent magnet of the first permanent magnet array 3 in the moving process, so that the food is placed in a changing magnetic field environment in the conveying process, the quick-freezing quality of the food can be better improved, and the quick-freezing requirements for different foods are met.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.