Magnetic field fresh-keeping device, refrigeration equipment and fresh-keeping control method thereof

Abstract

The application provides a magnetic field fresh-keeping device, a refrigeration equipment and a fresh-keeping control method thereof. The magnetic field fresh-keeping device comprises a shell, a magnetic field assembly, an image recognition device and a controller. The shell is formed with a fresh-keeping chamber. The magnetic field assembly is arranged on the inner side or the outer side of the shell to generate a magnetic field in the fresh-keeping chamber. The magnetic field assembly comprises two uniform magnet plates arranged on opposite sides of the fresh-keeping chamber, two magnetic conductive connecting pieces connected to the two ends of the two uniform magnet plates, two permanent magnets arranged on the side of the two uniform magnet plates close to the fresh-keeping chamber, and two coil groups sleeved outside the two permanent magnets. The image recognition device is arranged in the fresh-keeping chamber to identify the type of food stored in the fresh-keeping chamber. The controller is electrically connected with the image recognition device and the magnetic field assembly. The controller is used to control the energization state of the coils in the coil groups according to the type of food identified by the image recognition device, so as to adjust the magnetic field strength in the fresh-keeping chamber. The application can automatically adjust the magnetic field strength according to the type of food in the fresh-keeping chamber by arranging the image recognition device.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a magnetic field preservation device, a refrigeration equipment with the magnetic field preservation device, and a preservation control method thereof. Background Technology

[0002] Currently, fruits and vegetables stored in the refrigerator compartment are prone to dehydration and wilting. Seafood and meat consumed in the short term may freeze when stored in the refrigerator, and after thawing, juices are lost, protein and other nutrients are lost, and the taste deteriorates.

[0003] When a magnetic field is applied to fruits and vegetables during refrigeration, it can inhibit the growth of microorganisms and the activity of enzymes, keeping the fruits and vegetables fresh and shiny. Under refrigeration conditions, a magnetic field can lower the freezing point of food. For example, the freezing point of beef is -1℃, and when a magnetic field of a certain strength is applied to beef, the freezing point of beef can drop to -3℃ to -4℃; for example, the freezing point of salmon is -0.5℃, and under the influence of a magnetic field of a certain strength, the freezing point of salmon can drop to about -2℃. In this way, meat and seafood can be refrigerated at lower temperatures (low temperatures inhibit the growth of microorganisms) and kept fresh.

[0004] When storing different types of food, users need to select the corresponding function setting to ensure the food maintains better quality. However, users often forget to change to the function setting that provides the best preservation effect when placing food in the magnetic refrigeration drawer. Summary of the Invention

[0005] The purpose of this application is to provide a magnetic field preservation device, which includes a magnetic field component and an image recognition device. After the image recognition device identifies the type of food, the controller adjusts the magnetic field strength by controlling the energization state of the coil group in the magnetic field component. This solves the problem in the prior art where users forget to change to the appropriate storage setting.

[0006] To achieve one of the above-mentioned objectives, one embodiment of this application provides a magnetic field preservation device, comprising: a housing having a preservation compartment;

[0007] A magnetic field assembly is disposed on the inner or outer side of the housing to generate a magnetic field in the fresh-keeping compartment. The magnetic field assembly has two uniform magnetic plates disposed on opposite sides of the fresh-keeping compartment, two magnetically conductive connectors connecting the two ends of the two uniform magnetic plates, two permanent magnets disposed on the side of the two uniform magnetic plates near the fresh-keeping compartment, and two coil groups sleeved on the two permanent magnets. An image recognition device is installed inside the preservation room to identify the types of food stored inside the preservation room; The controller is electrically connected to the image recognition device and the magnetic field component, respectively. The controller is used to control the energization state of the coils in the coil group according to the type of food identified by the image recognition device, so as to adjust the magnetic field strength in the preservation room.

[0008] In one embodiment of this application, the magnetic field preservation device further includes an air inlet duct and a partition disposed in the air inlet duct, the partition dividing the air inlet duct into a first air duct near the preservation chamber and a second air duct away from the preservation chamber.

[0009] In one embodiment of this application, the air inlet duct has an air inlet, and the magnetic field preservation device further includes an air damper, which has a first state in which the air inlet is connected to a first air duct and a second state in which the air inlet is connected to a second air duct.

[0010] In one embodiment of this application, the magnetic field preservation device further includes an air outlet duct, wherein the air outlet duct and the air inlet duct are located on opposite sides of the preservation chamber, the air outlet duct has an air outlet, and the air outlet and the air inlet are located at the same end of the preservation chamber.

[0011] In one embodiment of this application, the housing opens to the front, and the magnetic field preservation device further includes a drawer that can be pulled out and disposed in the preservation chamber and a door connected to the drawer. The door covers the front opening of the preservation chamber and is provided with a ventilation duct that connects an air inlet duct and an air outlet duct.

[0012] In one embodiment of this application, the coil group includes a first coil and a second coil connected in parallel.

[0013] In one embodiment of this application, both the first coil and the second coil are hollow coils, and in the radial direction of the coils, the first coil is located outside the second coil.

[0014] This application also provides a refrigeration device, including a cabinet and a magnetic field preservation device disposed inside the cabinet, wherein the magnetic field preservation device is the aforementioned magnetic field preservation device.

[0015] In one embodiment of this application, the refrigeration equipment further includes an evaporator chamber with an evaporator, an air supply duct and a return air duct connected to the evaporator chamber, and an evaporation fan that transports the airflow in the evaporator chamber to the preservation room. The air inlet is connected to the air supply duct, and the air outlet is connected to the return air duct.

[0016] This application embodiment also provides a method for controlling the preservation of food in a refrigeration device, wherein the refrigeration device is the aforementioned refrigeration device, and the method for controlling the preservation of food includes the following steps: The image recognition device acquires images of the food in the fresh food room and identifies the types of food; based on the identified types of food, the storage compartments in the fresh food room are determined; the storage compartments include fruit and vegetable compartments, seafood compartments, and chilled meat compartments. Determine if the storage slot is for fruits and vegetables. If so, de-energize both the first and second coils; otherwise, energize the first and / or second coils.

[0017] In one embodiment of this application, when the storage slot is not the fruit and vegetable slot, it is determined whether the storage slot is the aquatic product slot. If so, the first coil or the second coil is energized; otherwise, the first coil and the second coil are energized.

[0018] In one embodiment of this application, when the storage position is fruit and vegetable, the control damper is in the second state so that the second air duct is connected to the air supply duct, and the evaporator is turned on; when the storage position is not fruit and vegetable, the control damper is in the first state so that the first air duct is connected to the air supply duct, and the evaporator is turned on. Determine if the temperature inside the preservation room has reached the preset temperature for the storage setting. If so, turn off the evaporator fan.

[0019] In one embodiment of this application, the preset temperature of the fruit and vegetable section is 4~8℃, the preset temperature of the aquatic product section is -2~0℃, and the preset temperature of the chilled meat section is -3.5~-1.5℃.

[0020] One or more technical solutions provided in this application have at least the following technical effects or advantages: The magnetic field preservation device provided in this application includes a magnetic field component and an image recognition device. The image recognition device identifies the type of food in the preservation chamber, enabling the controller to adjust the energization state of the coil group according to the type of food, thereby adjusting the magnetic field strength in the preservation chamber to a magnetic field strength suitable for the type of food. It can also adaptively adjust when the user forgets to adjust the storage setting. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the magnetic field preservation device in the embodiments of this application.

[0022] Figure 2 This is a schematic diagram of the magnetic field component in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram of the structure of the refrigeration equipment (damper in the first state) in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the structure of the refrigeration equipment (damper in the first state) in an embodiment of this application.

[0025] 10. Cabinet body; 20. Magnetic field preservation device; 30. Evaporator chamber; 301. Evaporator; 302. Evaporator fan; 40. Air duct; 50. Refrigerated compartment; 60. Frozen compartment; 1. Shell; 11. Fresh-keeping compartment; 21. Magnetic uniform plate; 211. Upper magnetic uniform plate; 212. Lower magnetic uniform plate; 22. Magnetic conductive connector; 221. Left magnetic conductive connector; 222. Right magnetic conductive connector; 23. Permanent magnet; 231. Upper permanent magnet; 232. Lower permanent magnet; 24. Coil group; 241. Upper coil group; 242. Lower coil group; 243. First coil; 244. Second coil; 3. Image recognition device; 4. Air inlet duct; 41. First air duct; 42. Second air duct; 43. Partition; 44. Air inlet; 45. Air damper; 46. Upper insulation layer; 5. Air outlet duct; 51. Air outlet; 6. Drawer; 7. Door; 71. Connecting ventilation duct; 8. Temperature sensor. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0028] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatially related descriptive terms used herein will be interpreted accordingly.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects being described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first coil may be referred to as a second coil, and similarly, a second coil may be referred to as a first coil, without departing from the scope of protection of this application.

[0031] This application provides a magnetic field preservation device 20, such as... Figure 1 As shown, it includes a housing 1, a magnetic field assembly, an image recognition device 3, and a controller.

[0032] The shell 1 forms a fresh-keeping compartment 11; the magnetic field assembly is disposed on the inner or outer side of the shell 1 to generate a magnetic field in the fresh-keeping compartment 11. The magnetic field assembly has two uniform magnetic plates 21 disposed on opposite sides of the fresh-keeping compartment 11, two magnetically conductive connectors 22 connecting the two ends of the two uniform magnetic plates 21, two permanent magnets 23 disposed on the side of the two uniform magnetic plates 21 near the fresh-keeping compartment 11, and two coil groups 24 sleeved on the two permanent magnets 23.

[0033] The image recognition device 3 is installed in the fresh food compartment 11 to identify the types of food stored in the fresh food compartment 11; the controller is electrically connected to the image recognition device 3 and the magnetic field component respectively. The controller is used to control the energization state of the coil in the coil group 24 according to the types of food identified by the image recognition device 3, so as to adjust the magnetic field strength in the fresh food compartment 11.

[0034] By using uniform magnetic plates 21 arranged on opposite sides of the fresh-keeping compartment 11 within the casing 1, and permanent magnets 23 and coil groups 24 arranged inside them, a magnetic field can be generated in the fresh-keeping compartment 11, thereby subjecting the food stored in the fresh-keeping compartment 11 to the magnetic field. The magnetic field can assist in the refrigeration and freezing of food. For refrigeration, the magnetic field can keep the food refrigerated below zero, meaning it will not freeze below zero, thus improving the preservation effect of the food.

[0035] The two uniform magnetic plates 21 are connected on the same side by magnetically conductive connectors 22. That is, the two magnetically conductive connectors 22 are also located on opposite sides of the preservation compartment 11. By connecting the two uniform magnetic plates 21 with the two magnetically conductive connectors 22, the magnetic field assembly forms a ring magnetic field loop, which improves the magnetic field utilization rate and reduces the influence of the magnetic field on external components. The uniform magnetic plates 21 are made of magnetically conductive materials, such as silicon steel.

[0036] like Figure 1 , 2 In the housing, the uniform magnetic plate 21 includes an upper uniform magnetic plate 211 and a lower uniform magnetic plate 212. Correspondingly, the permanent magnet 23 includes an upper permanent magnet 231 and a lower permanent magnet 232. The coil group 24 includes an upper coil group 241 and a lower coil group 242. The upper uniform magnetic plate 211, the upper permanent magnet 231, and the upper coil group 241 are jointly arranged on the outer side of the top of the housing, and the lower uniform magnetic plate 212, the lower permanent magnet 232, and the lower coil group 242 are jointly arranged on the outer side of the bottom of the housing. The magnetic conductive connector 22 includes a left magnetic conductive connector 221 and a right magnetic conductive connector 222. The left magnetic conductive connector 221 is located on the left side of the housing and connects the left end of the upper uniform magnetic plate 211 and the left end of the lower uniform magnetic plate 212. The right magnetic conductive connector 222 is located on the right side of the housing and connects the right end of the upper uniform magnetic plate 211 and the right end of the lower uniform magnetic plate 212.

[0037] Of course, the uniform magnetic plate 21, permanent magnet 23, coil assembly 24, and magnetically conductive connector 22 can also be disposed inside the outer casing, or partially disposed inside the outer casing and partially disposed outside the outer casing. The uniform magnetic plate 21, permanent magnet 23, and coil assembly 24 can also be disposed on the left and right sides of the fresh-keeping compartment 11, and the magnetically conductive connector 22 can be disposed on the top and bottom of the fresh-keeping compartment 11; or, the uniform magnetic plate 21, permanent magnet 23, and coil assembly 24 can be disposed on the front and rear sides of the fresh-keeping compartment 11, or the magnetically conductive connector 22 can be disposed on the front and rear sides of the fresh-keeping compartment 11.

[0038] The magnetic field preservation device 20 of this application is equipped with a magnetic field component and an image recognition device 3. The image recognition device 3 identifies the type of food in the preservation compartment 11, so that the controller can adjust the energization state of the coil group 24 according to the type of food, thereby adjusting the magnetic field strength in the preservation compartment 11 to a magnetic field strength suitable for the type of food. It can achieve adaptive adjustment when the user forgets to adjust the storage setting, so as to avoid the food being stored in an unsuitable magnetic field strength and affecting the preservation time.

[0039] In some embodiments of this application, the magnetic field preservation device 20 further includes an air inlet duct 4 and a partition 43 disposed in the air inlet duct 4. The partition 43 divides the air inlet duct 4 into a first air duct 41 on the side closer to the preservation chamber 11 and a second air duct 42 away from the preservation chamber 11.

[0040] The magnetic field preservation device 20 is equipped with an air inlet duct 4, which is connected to an external cold source. After the cold air enters the air inlet duct 4, it radiates into the preservation chamber 11 to cool the food inside the preservation chamber 11, making it easier to store. The air inlet duct 4 is divided into two air ducts by a partition 43, which can be adapted to the air intake method when controlling the temperature of different food items.

[0041] The first air duct 41 is located closer to the fresh food compartment 11. The cold air in the air inlet duct 4 can be better radiated into the fresh food compartment 11. It is suitable for storage areas in the fresh food compartment 11 that require lower temperatures, such as the seafood section and the chilled meat section. The second air duct 42 is located away from the fresh food compartment 11. It is separated from the fresh food compartment 11 by the first air duct 41. The cold air in the air inlet duct 4 will not be directly radiated into the fresh food compartment 11. It is suitable for storage areas in the fresh food compartment 11 that require less low temperatures, such as the vegetable section.

[0042] The air inlet duct 4 can be located either inside or outside the housing, such as... Figure 1 In this configuration, the air inlet duct 4 is located on the outer side of the outer casing. An upper insulation layer 46 is provided on the top of the outer casing. The aforementioned upper magnetic uniform plate 211, upper permanent magnet 231, and upper coil assembly 241 are attached to the outer side of the top of the outer casing, forming the air inlet duct 4 between the upper magnetic uniform plate 211 and the upper insulation layer 46. Of course, insulation layers can also be provided on the bottom, left side, right side, front side, and rear side of the magnetic field preservation component. Figure 1 The diagram only shows the upper insulation layer 46 that forms the air intake duct 4.

[0043] Air inlet 4 is located on the outside of the outer casing, preventing cold air from blowing directly onto the food. This helps avoid the cold air carrying away moisture from the food's surface and prevents the food from freezing due to excessively low temperatures. For freezing, the magnetic field can prevent the formation of large ice crystals during freezing, reducing the likelihood of cell puncture and minimizing juice loss.

[0044] In some embodiments of this application, the air inlet duct 4 has an air inlet 44, and the magnetic field preservation device 20 further includes an air damper 45. The air damper 45 has a first state in which the air inlet 44 is connected to the first air duct 41, and a second state in which the air inlet 44 is connected to the second air duct 42. By providing the air damper 45, the air inlet 44 can be selectively connected to the first air duct 41 or the second air duct 42.

[0045] In some embodiments of this application, the magnetic field preservation device 20 further includes an air outlet 5, the air outlet 5 and the air inlet 4 are located on opposite sides of the preservation chamber 11, the air outlet 5 has an air outlet 51, and the air outlet 51 and the air inlet 44 are located at the same end of the preservation chamber 11.

[0046] The magnetic field preservation device 20 allows external cold air to enter the air inlet 4 through the air inlet 44, and then flows through the air outlet 5 and is blown out from the air outlet 51. The cold air exchanges heat with the preservation chamber 11 in the air inlet 4 and the air outlet 5 to reduce the temperature in the preservation chamber 11.

[0047] The air outlet 51 and the air inlet 44 are located at the same end of the fresh food compartment 11, such as... Figure 1 In this design, both the air inlet 44 and the air outlet 51 are located at the rear end of the fresh food compartment 11. The cold air enters the air inlet 4 from the air inlet 44 at the rear end, flows forward, then enters the air outlet 5, and then flows backward and exits from the air outlet 51. This results in a longer path for the cold air to pass through the fresh food compartment 11, providing sufficient heat exchange time and improving heat exchange efficiency.

[0048] In some embodiments of this application, the housing 1 opens to the front, and the magnetic field preservation device 20 also includes a drawer 6 that can be pulled out and disposed in the preservation compartment 11 and a door 7 connected to the drawer 6. The door 7 blocks the front opening of the preservation compartment 11, and the door 7 is provided with a ventilation duct 71, which connects the air inlet duct 4 and the air outlet duct 5.

[0049] The magnetic field preservation device 20 has a drawer 6 inside its housing 1. Therefore, the magnetic field preservation device 20 can also be regarded as a drawer 6 assembly. A magnetic field assembly is set in the drawer 6 assembly to give it a magnetic field preservation effect.

[0050] A ventilation duct 71 is provided in the door body 7 to connect the air inlet duct 4 and the air outlet duct 5, so that a circulation path is formed in the magnetic field preservation device 20, consisting of the air inlet 44, the air inlet duct 4, the ventilation duct 71, the air outlet duct 5, and the air outlet 51, thus completing the cold air circulation for the magnetic field preservation device 20.

[0051] The air outlet duct 5 can also be located inside or outside the housing, such as... Figure 1 In the middle, the air outlet 5 is located on the inner side of the bottom of the outer casing, forming between the bottom of the drawer 6 and the bottom of the outer casing, and the air outlet 51 is located at the rear end of the outer casing.

[0052] Because the magnetic field preservation component is equipped with a drawer 6, and the air inlet 4 is located on the top outer side of the shell 1, the ventilation duct 71 is located on the door 7, and the air outlet 5 is located between the bottom of the drawer 6 and the bottom of the shell, the food is placed in the drawer 6, and the entire cold air circulation path avoids the space formed by the drawer 6, so the cold air will never blow directly on the food.

[0053] In some embodiments of this application, the coil group 24 includes a first coil 243 and a second coil 244 connected in parallel. Thus, when the first coil 243 or the second coil 244 is energized, and when both the first coil 243 and the second coil 244 are energized, the current through either coil is the same (assuming the voltage applied to the coil group 24 is the same and the number of turns of the first coil 243 and the second coil 244 is the same).

[0054] When both the first coil 243 and the second coil 244 are energized, both the first coil 243 and the second coil 244 can generate magnetic fields. The magnetic fields generated by the first coil 243 and the second coil 244 are superimposed, and the total magnetic field strength is relatively large, which can counteract the strength of the external magnetic field entering the fresh-keeping compartment 11. Only one coil of the first coil 243 or the second coil 244 can generate a magnetic field, and the strength of the generated magnetic field is relatively small.

[0055] This application, by setting up two parallel first coils 243 and second coils 244, can adjust the number of energized coils according to the storage level of the fresh food compartment 11.

[0056] In other words, by forming a coil group 24 with two coils 24, and setting the two coils to have a smaller number of turns to replace the coil with a larger number of turns, it is possible to energize one coil or both coils when the fresh food compartment 11 is set to different storage levels due to different magnetic field strength requirements. That is, when the required strength of the fresh food compartment 11 is low, only the first coil 243 or the second coil 244 is energized; when the required strength of the fresh food compartment 11 is high, the first coil 243 and the second coil 244 are energized simultaneously. This avoids the problem of energy waste and high coil heat generation caused by directly energizing the coil with a larger number of turns when the required magnetic field strength is low.

[0057] In some embodiments of this application, both the first coil 243 and the second coil 244 are hollow coils, and in the radial direction of the coils, the first coil 243 is located outside the second coil 244. Here, the radial direction refers to the direction outward from the center point of the hollow coil, and does not necessarily mean that the hollow coil is circular. Figure 2 The middle part can be square.

[0058] The first coil 243 is located outside the second coil 244. That is, the inner dimension of the first coil 243 needs to be larger than the outer dimension of the second coil 244. This allows the first coil 243 and the second coil 244 to be arranged in the same plane, rather than overlapping in the direction perpendicular to the plane where the coils are located. This reduces the thickness occupied by the coil group 24 and reduces the overall volume of the magnetic field preservation device 20.

[0059] This application embodiment also provides a refrigeration device, including a cabinet 10 and a magnetic field preservation device 20 disposed in the cabinet 10, wherein the magnetic field preservation device 20 is the aforementioned magnetic field preservation device 20.

[0060] In some embodiments of this application, the refrigeration equipment further includes an evaporator chamber 30 with an evaporator 301, an air supply duct 40 and a return air duct connected to the evaporator chamber 30, an evaporation fan 302 that transports the airflow in the evaporator chamber 30 to the preservation room 11, an air inlet 44 connected to the air supply duct 40, and an air outlet 51 connected to the return air duct.

[0061] The refrigeration equipment also includes a refrigerator compartment 50 and a freezer compartment 60. The aforementioned magnetic field preservation device 20 can be installed inside the refrigerator compartment 50 or outside the refrigerator compartment 50 and freezer compartment 60, and can be installed independently. Figure 3 , 4 In the middle, the magnetic field preservation device 20 is installed in the cold storage compartment 50. The refrigeration equipment is a dual system (two independent refrigeration systems). The magnetic field preservation device 20 and the cold storage compartment 50 share a refrigeration system.

[0062] The air inlet 44 of the magnetic field preservation chamber 11 is connected to the air supply duct 40 of the refrigeration equipment, and the air outlet 51 of the magnetic field preservation device 20 is connected to the return air duct of the refrigeration equipment. The cold energy generated by the evaporator 301 flows from the evaporator chamber 30 through the air supply duct 40 under the action of the evaporation fan 302, enters the magnetic field preservation device 20 from the air inlet 44, flows through the air inlet 4, the connecting air duct 71, and the air outlet 5, and then flows out from the air outlet 51 to the return air duct, and finally returns to the evaporator chamber 30, completing the circulation of cold energy.

[0063] like Figure 3 , 4 In the middle, there is no clear division between the return air duct and the evaporator chamber 30, and the two can be regarded as one, that is, the cold air flowing out from the air outlet 51 directly enters the evaporator chamber 30.

[0064] An embodiment of this application also provides a method for controlling the preservation of food in a refrigeration device, wherein the refrigeration device is the aforementioned refrigeration device, and the method for controlling the preservation of food includes the following steps: The image recognition device 3 acquires images of the food in the fresh food compartment 11 and identifies the types of food; based on the identified types of food, the storage compartment 11 is determined; the storage compartments include fruit and vegetable compartment, seafood compartment and chilled meat compartment. Determine whether the storage slot is for fruits and vegetables. If so, de-energize both the first coil 243 and the second coil 244; otherwise, energize the first coil 243 and / or the second coil 244.

[0065] Image recognition device 3 can identify images of food ingredients in the fresh food compartment 11 and transmit the identified images to the controller. The controller identifies the type of food ingredients through the images, such as fruits and vegetables, seafood, and chilled meat, and determines the storage compartment of the fresh food compartment 11 according to the type of food ingredients, such as the fruit and vegetable compartment, seafood compartment, and chilled meat compartment.

[0066] Different ingredients have different optimal magnetic field strengths for preservation. In other words, different storage levels have different preset magnetic field strengths. Therefore, after the controller obtains the type of ingredients and determines the storage level, it controls the energization of the coil group 24 according to the magnetic field strength required for the storage level.

[0067] The suitable magnetic field strength for storing fruits and vegetables is relatively low. Since the permanent magnet 23 in the magnetic field assembly can provide a certain magnetic field strength, when the storage setting of the fresh food compartment 11 is set to fruits and vegetables, it is not necessary to connect the coil group 24. The magnetic field strength generated by the permanent magnet 23 is sufficient to achieve the suitable magnetic field strength for fresh food storage, which is about 10-30 Gs. However, the suitable magnetic field strength for storing aquatic products and chilled meat is relatively high. Therefore, it is necessary to connect the coil in the coil group 24.

[0068] Therefore, when the storage position is not the fruit and vegetable position, it is determined whether the storage position is the aquatic product position. If so, the first coil 243 or the second coil 244 is energized; otherwise, the first coil 243 and the second coil 244 are energized.

[0069] Compared to chilled meat, aquatic products require a lower magnetic field strength for storage, while chilled meat requires a higher magnetic field strength. Therefore, when the storage setting of the fresh food compartment 11 is set to aquatic products, energizing either the first coil 243 or the second coil 244 in conjunction with the permanent magnet 23 will achieve the magnetic field strength suitable for aquatic product storage, approximately 30-70 Gs. When the storage setting of the fresh food compartment 11 is set to chilled meat, a higher magnetic field strength is required. Energizing both the first coil 243 and the second coil 244 in conjunction with the permanent magnet 23 will generate an even higher magnetic field strength, approximately 50-90 Gs.

[0070] In some embodiments of this application, when the storage position is fruit and vegetable, the control damper 45 is in the second state so that the second air duct 42 is connected to the air supply duct 40, and the control evaporator fan 302 is turned on; when the storage position is not fruit and vegetable, the control damper 45 is in the first state so that the first air duct 41 is connected to the air supply duct 40, and the control evaporator fan 302 is turned on. Determine whether the temperature inside the fresh food compartment 11 has reached the preset temperature of the storage setting. If so, turn off the evaporator fan 302.

[0071] That is, the magnetic field preservation device 20 is also equipped with a temperature sensor 8 located in the preservation chamber 11 to detect the temperature in the preservation chamber 11.

[0072] Similarly, different ingredients have different optimal preservation temperatures, that is, different storage compartments have different preset temperatures. The preset temperature for fruits and vegetables is 4~8℃, the preset temperature for seafood is -2~0℃, and the preset temperature for chilled meat is -3.5~-1.5℃.

[0073] Therefore, once the controller obtains the type of food and determines the storage level, it controls the temperature according to the temperature required for that storage level.

[0074] The preset temperature of the fruit and vegetable section is too high, above 0°C, while the temperature of the evaporator 301 is below zero. Directly blowing sub-zero temperatures into the air inlet duct 4 results in a large amount of radiated cold air entering the fresh-keeping compartment 11, which could easily cause the temperature inside the compartment to also reach below zero, freezing the fruits and vegetables. Therefore, the damper 45 is controlled to be in the second state, allowing cold air to enter the second air duct 42 on the side of the partition 43 away from the fresh-keeping compartment 11, and then radiate into the fresh-keeping compartment 11 through the first air duct 41, preventing the cold air from directly radiating into the compartment and causing the temperature inside to be too low.

[0075] The temperature at the seafood and chilled meat stalls is low, below 0°C. The control damper 45 is in the first state, allowing cold air to enter the first air duct 41 on the side of the partition 43 near the fresh food compartment 11. The cold air directly radiates into the fresh food compartment 11, avoiding waste of cold energy.

[0076] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0077] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A magnetic field preservation device (20), characterized in that, include: The shell (1) has a preservation compartment (11); A magnetic field assembly is disposed on the inner or outer side of the housing (1) to generate a magnetic field in the fresh-keeping compartment (11). The magnetic field assembly has two uniform magnetic plates (21) disposed on opposite sides of the fresh-keeping compartment (11), two magnetically conductive connectors (22) connecting the two ends of the two uniform magnetic plates (21), two permanent magnets (23) disposed on the side of the two uniform magnetic plates (21) near the fresh-keeping compartment (11), and two coil groups (24) sleeved on the two permanent magnets (23). An image recognition device (3) is installed in the preservation room (11) to identify the types of food stored in the preservation room (11); The controller is electrically connected to the image recognition device (3) and the magnetic field component respectively. The controller is used to control the energization state of the coil in the coil group (24) according to the type of food identified by the image recognition device (3) in order to adjust the magnetic field strength in the fresh food compartment (11).

2. The magnetic field preservation device (20) according to claim 1, characterized in that, It also includes an air inlet duct (4) and a partition (43) disposed in the air inlet duct (4), the partition (43) dividing the air inlet duct (4) into a first air duct (41) near the side of the fresh food compartment (11) and a second air duct (42) away from the fresh food compartment (11).

3. The magnetic field preservation device (20) according to claim 2, characterized in that, The air inlet duct (4) has an air inlet (44), and the magnetic field preservation device (20) further includes a damper (45). The damper (45) has a first state in which the air inlet (44) is connected to the first air duct (41), and a second state in which the air inlet (44) is connected to the second air duct (42).

4. The magnetic field preservation device (20) according to claim 3, characterized in that, It also includes an air outlet (5), the air outlet (5) and the air inlet (4) are located on opposite sides of the fresh food storage room (11), the air outlet (5) has an air outlet (51), and the air outlet (51) and the air inlet (44) are located at the same end of the fresh food storage room (11).

5. The magnetic field preservation device (20) according to claim 4, characterized in that, The housing (1) opens to the front. The magnetic field preservation device (20) also includes a drawer (6) that can be pulled out and installed in the preservation chamber (11) and a door (7) connected to the drawer (6). The door (7) blocks the front opening of the preservation chamber (11). The door (7) is provided with a ventilation duct (71), which connects the air inlet duct (4) and the air outlet duct (5).

6. The magnetic field preservation device (20) according to claim 3, characterized in that, The coil group (24) includes a first coil (243) and a second coil (244) connected in parallel.

7. The magnetic field preservation device (20) according to claim 6, characterized in that, Both the first coil (243) and the second coil (244) are hollow coils, and in the radial direction of the coils, the first coil (243) is located outside the second coil (244).

8. A refrigeration device, characterized in that, It includes a housing (10) and a magnetic field preservation device (20) disposed within the housing (10), wherein the magnetic field preservation device (20) is the magnetic field preservation device (20) as described in claim 6 or 7.

9. The refrigeration equipment according to claim 8, characterized in that, It also includes an evaporator chamber (30) equipped with an evaporator (301), an air supply duct (40) and a return air duct connected to the evaporator chamber (30), and an evaporation fan (302) that transports the airflow in the evaporator chamber (30) to the preservation room (11). The air inlet (44) is connected to the air supply duct (40), and the air outlet (51) is connected to the return air duct.

10. A method for controlling the preservation of food in a refrigeration device, characterized in that, The refrigeration equipment is the refrigeration equipment according to claim 9, and the preservation control method includes the following steps: The image recognition device (3) acquires images of food ingredients in the fresh food room (11) and identifies the types of food ingredients; based on the identified types of food ingredients, the storage compartments of the fresh food room (11) are determined; among them, the storage compartments include fruit and vegetable compartments, aquatic product compartments and chilled meat compartments. Determine whether the storage slot is for fruits and vegetables. If so, control the first coil (243) and the second coil (244) to be de-energized; otherwise, control the first coil (243) and / or the second coil (244) to be energized.

11. The preservation control method for refrigeration equipment according to claim 10, characterized in that, When the storage position is not the fruit and vegetable position, determine whether the storage position is the aquatic product position. If so, control the first coil (243) or the second coil (244) to be energized. Otherwise, control the first coil (243) and the second coil (244) to be energized.

12. The preservation control method for refrigeration equipment according to claim 10, characterized in that, When the storage setting is fruit and vegetable, the control damper (45) is in the second state so that the second air duct (42) is connected to the air supply duct (40), and the control evaporator fan (302) is turned on; When the storage position is not fruit and vegetable, the control damper (45) is in the first state so that the first air duct (41) is connected to the air supply duct (40), and the control evaporator (302) is turned on; Determine whether the temperature inside the preservation room (11) has reached the preset temperature of the storage setting. If so, turn off the evaporator fan (302).

13. The preservation control method for refrigeration equipment according to claim 12, characterized in that, The preset temperature for the fruit and vegetable stall is 4~8℃, the preset temperature for the aquatic product stall is -2~0℃, and the preset temperature for the chilled meat stall is -3.5~-1.5℃.

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