Food material fresh-keeping device and magnetic field determination method thereof

Abstract

The invention provides a food material fresh-keeping device and a magnetic field intensity determination method thereof. The method comprises the following steps: obtaining N minimum magnetic field intensities and N maximum magnetic field intensities corresponding to N food materials in the food material fresh-keeping device; determining a first boundary value according to a maximum value in the N minimum magnetic field intensities, and selecting a magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value based on a distribution relationship between the first boundary value and the N maximum magnetic field intensities; and determining a target magnetic field range according to the first boundary value and the second boundary value. According to the method, a dynamic adjustment mechanism is adopted, the special requirements of more food materials can be met to the maximum extent, the utilization efficiency of magnetic field energy is remarkably improved, and precise preservation and energy-saving operation under the scene that multiple food materials coexist are achieved.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a food preservation device and a method for determining a magnetic field thereof. Background Art

[0002] In the field of food preservation, magnetic field preservation technology has attracted widespread attention due to its advantages such as non-thermal effect and absence of chemical residues. Existing technologies typically use a fixed-intensity or single-range magnetic field for preservation. For example, an optimal magnetic field range is set for a specific type of food (such as leafy vegetables or meat), or a wide range of magnetic field intensities is used to cover the needs of a variety of ingredients.

[0003] However, when multiple foods are stored in a food preservation device at the same time, the optimal magnetic field ranges for different foods are often quite different due to significant differences in their cell structures, water content, and biological characteristics. For example, high-moisture foods (such as strawberries) require a stronger magnetic field to suppress the movement of water molecules, while low-moisture foods (such as nuts) may experience increased lipid oxidation under the same magnetic field. The existing direction can neither dynamically adapt to the magnetic field requirements of different food combinations, nor optimize energy efficiency while ensuring the most basic preservation effect for all foods, resulting in some foods being in a suboptimal state of preservation or suffering from magnetic field overload damage.

[0004] This contradiction is particularly prominent in scenarios where household food is mixed. Existing technologies often adopt compromise solutions, sacrificing the freshness-keeping effect of some food or increasing the overall magnetic field strength, which not only causes energy waste, but may also accelerate the deterioration of certain food ingredients. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a magnetic field determination method for a food preservation device to solve the technical problem in the prior art that when the optimal magnetic field ranges of multiple foods are inconsistent, it is impossible to find a magnetic field range that simultaneously meets the needs of most foods, resulting in most foods being unable to achieve the best preservation effect.

[0006] In order to achieve one of the above-mentioned objects of the invention, the present invention provides a method for determining the magnetic field strength of a food preservation device, including: obtaining N minimum magnetic field intensities and N maximum magnetic field intensities corresponding to N types of food in the food preservation device; determining a first boundary value according to the maximum value of the N minimum magnetic field intensities, and based on the distribution relationship between the first boundary value and the N maximum magnetic field intensities, selecting a magnetic field strength greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value; and determining a target magnetic field range according to the first boundary value and the second boundary value.

[0007] As a further improvement of an embodiment of the present invention, based on the distribution relationship between the first boundary value and N maximum magnetic field strengths, a magnetic field strength greater than the first boundary value is selected from the N maximum magnetic field strengths as the second boundary value, including: when the maximum value among the N minimum magnetic field strengths is greater than or equal to the minimum value among the N maximum magnetic field strengths, the minimum magnetic field strength greater than the first boundary value is selected from the N maximum magnetic field strengths as the second boundary value.

[0008] As a further improvement of an embodiment of the present invention, based on the distribution relationship between the first boundary value and the N maximum magnetic field strengths, a magnetic field strength greater than the first boundary value is selected from the N maximum magnetic field strengths as the second boundary value, including: when the maximum value among the N minimum magnetic field strengths is less than the minimum value among the N maximum magnetic field strengths, the minimum value of the N maximum magnetic field strengths is selected as the second boundary value.

[0009] As a further improvement of one embodiment of the present invention, the food preservation device also includes a magnetic control component. After determining the target magnetic field range, the method also includes: when the actual magnetic field strength in the food preservation device is not within the target magnetic field range, controlling the magnetic control component so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range.

[0010] As a further improvement of one embodiment of the present invention, the magnetic control component includes a first component and a second component, the storage unit in the food preservation device is arranged between the first component and the second component, the first component is used to generate a first magnetic field, and the second component is used to generate a second magnetic field; the actual magnetic field strength is equal to the vector sum of the magnetic field strengths of the first magnetic field and the second magnetic field.

[0011] As a further improvement of one embodiment of the present invention, it is determined whether the magnetic field directions of the first magnetic field and the second magnetic field at the storage unit are the same; if so, when the actual magnetic field strength is less than the first boundary value, the current provided by the power supply to the first component and / or the second component is increased until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, if so, when the actual magnetic field strength is greater than the second boundary value, the current provided by the power supply to the first component and / or the second component is reduced until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0012] As a further improvement of one embodiment of the present invention, after determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same, the method further includes: if not, when the actual magnetic field strength is less than the first boundary value, increasing the current provided by the power supply to the first component and / or decreasing the current provided by the power supply to the second component until the actual magnetic field strength at the placement unit falls within the target magnetic field range; and / or, if not, when the actual magnetic field strength is greater than the second boundary value, decreasing the current provided by the power supply to the first component and / or increasing the current provided by the power supply to the second component until the actual magnetic field strength at the placement unit falls within the target magnetic field range.

[0013] As a further improvement of one embodiment of the present invention, the magnetic control component is controlled so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range, including: determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the storage unit are the same; if so, when the actual magnetic field strength is less than the first boundary value, shortening the distance between the first component and the storage unit and / or shortening the distance between the second component and the storage unit until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, if so, when the actual magnetic field strength is greater than the second boundary value, expanding the distance between the first component and the storage unit and / or expanding the distance between the second component and the storage unit.

[0014] As a further improvement to an embodiment of the present invention, after determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same, the method further includes: if not, when the actual magnetic field strength is less than the first boundary value, shortening the distance between the first component and the placement unit, and / or increasing the distance between the second component and the placement unit, until the actual magnetic field strength at the placement unit falls within a target magnetic field range; and / or, if not, when the actual magnetic field strength is greater than the second boundary value, increasing the distance between the first component and the placement unit, and / or shortening the distance between the second component and the placement unit, until the actual magnetic field strength at the placement unit falls within the target magnetic field range.

[0015] In order to achieve one of the above-mentioned objects of the invention, the present invention provides a food preservation device, comprising: a first electromagnetic coil, for generating a first magnetic field; a second component, arranged within the range of the first magnetic field, comprising a second electromagnetic coil and a placement unit, wherein the second electromagnetic coil is arranged at the placement unit, and the placement unit is used to place food; and a control device, for executing the steps of the method for determining the magnetic field strength of the food preservation device.

[0016] Compared with the prior art, the embodiments of the present invention have at least one of the following beneficial effects:

[0017] The present invention discloses a magnetic field determination method for a food preservation device. By determining the maximum value among the minimum magnetic field intensities of all food ingredients as a first boundary value, it is ensured that all food ingredients can obtain the most basic magnetic field preservation requirements. Then, based on the distribution relationship between the first boundary value and the maximum magnetic field intensity of each food ingredient, a value greater than the first boundary value is selected from the maximum magnetic field intensity as the second boundary value. Therefore, when there is a conflict in the magnetic field requirements of multiple food ingredients, an optimized range that can both cover the needs of the most food ingredients and avoid damage to the food ingredients due to excessive magnetic fields can be intelligently found. This method adopts a dynamic adjustment mechanism, which can maximize compatibility with the special needs of more food ingredients and significantly improve the utilization efficiency of magnetic field energy, thus achieving precise preservation and energy-saving operation in scenarios where multiple food ingredients coexist. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a food preservation device in one embodiment of the present invention.

[0019] Figure 2 1 is a schematic diagram of the steps of a method for determining the magnetic field strength of a food preservation device in one embodiment of the present invention.

[0020] Figure 3 2 is a schematic diagram of step S2 in a specific embodiment of the present invention.

[0021] FIG. 4( a ) is a schematic diagram of step S4 in a specific embodiment of the present invention.

[0022] FIG4( b ) is a schematic diagram of step S4 in another specific embodiment of the present invention.

[0023] FIG5( a ) is a schematic diagram of step S4 in another specific embodiment of the present invention.

[0024] FIG5( b ) is a schematic diagram of step S4 in yet another specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0026] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] like Figure 1 As shown, an embodiment of the present invention provides a food preservation device 100.

[0028] The food preservation device 100 includes a first electromagnetic coil 11 for generating a first magnetic field. This first magnetic field is used to preserve food within the food preservation device 100. Furthermore, this first magnetic field indirectly affects the actual magnetic field strength within the food preservation device by influencing a second component.

[0029] The food preservation device 100 includes a second component, which is arranged within the range of the first magnetic field generated by the first electromagnetic coil 11. The second component includes a second electromagnetic coil 12 and a storage unit 13, wherein the second electromagnetic coil 12 is arranged at the storage unit 13, and the storage unit 13 is used to place food.

[0030] In one embodiment, when the second electromagnetic coil 12 is energized, the second electromagnetic coil 12 will generate a second magnetic field. The superposition or offset of the first magnetic field and the second magnetic field will form a third magnetic field in the food preservation device 100. The magnetic field strength of the third magnetic field is related to the magnetic field strength and magnetic field direction of the first magnetic field and the second magnetic field.

[0031] In a specific embodiment, when the magnetic field strength of the third magnetic field does not match the target magnetic field strength, the current of the power supply to the first electromagnetic coil 11 is adjusted; and / or the current of the power supply to the second electromagnetic coil 12 is adjusted until the actual magnetic field strength of the third magnetic field matches the target magnetic field strength.

[0032] In another specific embodiment, when the actual magnetic field strength in the food preservation device 100 does not match the target magnetic field strength, the current direction of the power supply to the first electromagnetic coil 11 is adjusted; and / or, the current direction of the power supply to the second electromagnetic coil 12 is adjusted.

[0033] In another specific embodiment, the direction and magnitude of the current to the first electromagnetic coil 11 are adjusted, and / or the direction and magnitude of the current to the second electromagnetic coil 12 are adjusted, so that the actual magnetic field strength in the food preservation device 100 matches the target magnetic field strength.

[0034] In one embodiment, the food preservation device 100 includes a magnetic field strength sensor for detecting the actual magnetic field strength at the storage unit.

[0035] The food preservation device 100 further includes a control module, which is used to implement a method for determining the magnetic field strength of the food preservation device.

[0036] In a specific embodiment, the method for determining the magnetic field strength of the food preservation device may adopt the control method described below.

[0037] like Figure 2 As shown, one embodiment of the present invention provides a method for determining the magnetic field strength of a food preservation device, comprising the following steps.

[0038] Step S1, obtaining N minimum magnetic field intensities and N maximum magnetic field intensities corresponding to N kinds of food in a food preservation device;

[0039] Step S2: determining a first boundary value according to the maximum value of the N minimum magnetic field intensities, and selecting a magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value based on a distribution relationship between the first boundary value and the N maximum magnetic field intensities;

[0040] Step S3: determining a target magnetic field range according to the first boundary value and the second boundary value.

[0041] In this way, by determining the maximum value among the minimum magnetic field intensities of all ingredients as the first boundary value, it is ensured that all ingredients can obtain the most basic magnetic field preservation requirements; then, based on the distribution relationship between this first boundary value and the maximum magnetic field intensity of each ingredient, a value greater than the first boundary value is selected from the maximum magnetic field intensity as the second boundary value. Therefore, when there is a conflict in the magnetic field requirements of multiple ingredients, an optimized range can be intelligently found that can cover the needs of the most ingredients while avoiding damage to the ingredients due to excessive magnetic fields. This method adopts a dynamic adjustment mechanism that can maximize compatibility with the special needs of more ingredients and significantly improve the utilization efficiency of magnetic field energy, achieving precise preservation and energy-saving operation in scenarios where multiple ingredients coexist.

[0042] In step S1, a food preservation device refers to a device or container specifically used to store, preserve, and manage food. These devices ensure that food maintains its freshness, nutrition, and taste during storage. The food preservation device can be a refrigerator, freezer, or a module within a refrigerator or freezer, such as a fresh-keeping drawer.

[0043] It should be noted that the main effect of magnetic fields on food preservation is that they can inhibit the growth of microorganisms and molds, thereby extending the storage period of food. Specifically, when using a magnetic field to assist in the storage of food, the magnetic field limits the free path of water molecules to a certain extent, which is specifically manifested as the breaking of hydrogen bonds in the water molecule family, so that during the phase change process of water, the growth of crystal nuclei is inhibited, the growth rate of ice crystals is higher than the migration rate of water molecules, and the resulting ice crystals are smaller, resulting in less damage to cells, reducing the loss rate of juice in the food, and allowing the nutrition and taste of the food to be better preserved. Therefore, magnetic fields can be used to assist in the storage of food, thereby achieving the purpose of extending the storage period of food.

[0044] The minimum magnetic field strength refers to the lowest magnetic field strength required to achieve basic preservation effect on food. When it is lower than this value, the magnetic field has no obvious preservation effect on the food, and cannot effectively inhibit microbial growth or delay oxidation reactions.

[0045] The maximum magnetic field strength refers to the upper limit of magnetic field strength that a food can withstand without negative effects. Exceeding this value may damage the food's cell structure, cause loss of nutrients, or accelerate spoilage (for example, excessive magnetization can cause protein denaturation).

[0046] In step S2, the distribution relationship can be understood as the distribution of the N maximum magnetic field intensities of the N types of food within the food storage device relative to the first boundary value. Specifically, if the maximum magnetic field strength of a particular food is greater than or equal to the first boundary value, it indicates that the food can adapt to higher magnetic fields and will not be damaged by excessively strong magnetic fields. If the maximum magnetic field strength of a particular food is less than the first boundary value, it indicates that the optimal magnetic field range for the food is relatively low. If the first boundary value is used as the magnetic field strength, it may exceed the food's tolerance range, affecting the food's preservation effect.

[0047] In a specific embodiment, the target magnetic field range has a first boundary value as a lower limit value and a second boundary value as an upper limit value.

[0048] like Figure 3 As shown, in a specific embodiment, step S2, based on the distribution relationship between the first boundary value and the N maximum magnetic field intensities, selects a magnetic field strength greater than the first boundary value from the N maximum magnetic field intensities as the second boundary value, which specifically includes the following steps.

[0049] Step S21, when the maximum value among the N minimum magnetic field intensities is greater than or equal to the minimum value among the N maximum magnetic field intensities, selecting the minimum magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as the second boundary value;

[0050] Step S22: When the maximum value among the N minimum magnetic field intensities is smaller than the minimum value among the N maximum magnetic field intensities, selecting the minimum value of the N maximum magnetic field intensities as the second boundary value.

[0051] In this way, while ensuring that all ingredients meet basic preservation requirements, the magnetic field energy consumption can be minimized and over-magnetization damage can be avoided.

[0052] In step S21, when the maximum value of the minimum magnetic field requirement of the food (the first boundary value) intersects with the minimum value of the maximum tolerable magnetic field, the minimum tolerable magnetic field that just exceeds the first boundary value (that is, the minimum value of the maximum magnetic field strength that is greater than the first boundary value) is selected as the second boundary value. This ensures that all food meets the minimum magnetic field strength, and can apply the necessary high field strength to food with strong tolerance, thereby avoiding excessive magnetization of sensitive food.

[0053] In step S22, when there is no intersection between the maximum value of the minimum magnetic field requirement of the food (first boundary value) and the minimum value of the maximum magnetic field strength, the minimum value of the maximum magnetic field strength is directly used as the second boundary value, which can be understood as the most conservative mode to avoid cell damage to the food due to excessive magnetic field.

[0054] In a specific embodiment, assuming that there are N kinds of food in the food preservation device, the corresponding N minimum magnetic field strengths are sorted from small to large, and the first sorting result is BSmin1, BSmin2, BSmin3, ..., BSmin; the corresponding N maximum magnetic field strengths are sorted from small to large, and the second sorting result is BSmax1, BSmax2, BSmax3, ..., BSmax.

[0055] When BSmin < BSmax1, the preservation requirements of all ingredients are compatible. [BSmin, BSmax1] is selected as the current target magnetic field range for the food preservation device. In this scenario, all food requirements can be met, creating an ideal energy-saving and fresh-keeping scenario.

[0056] When BSmin ≥ BSmax1, this indicates that at least one ingredient's requirements are irreconcilable. This means that the minimum requirement of one ingredient (e.g., BSmin X for ingredient X) is higher than the maximum tolerance of another ingredient (e.g., BSmax Y for ingredient Y). This means that it's impossible to find a magnetic field range that satisfies both X and Y. In this case, BSmax n is dynamically selected, and the first value from the second sorting result that is greater than BSmin is chosen as the second boundary value, minimizing the number of ingredients affected by a conflict.

[0057] For ease of understanding, for example, assume that four types of food are stored in the food preservation device, and their optimal magnetic field ranges are: food A is 15-20 (i.e., the minimum magnetic field strength BSmin1 is 15, and the maximum magnetic field strength BSmax1 is 20), food B is 18-22 (i.e., the minimum magnetic field strength BSmin2 is 18, and the maximum magnetic field strength BSmax2 is 22), food C is 10-16 (i.e., the minimum magnetic field strength BSmin3 is 10, and the maximum magnetic field strength BSmax3 is 16), and food D is 12-19 (i.e., the minimum magnetic field strength BSmin4 is 12, and the maximum magnetic field strength BSmax4 is 19).

[0058] The minimum magnetic field strength and maximum magnetic field strength of these four ingredients are sorted from small to large, and the first sorting results are 10 (BSmin3), 12 (BSmin4), 15 (BSmin1), and 18 (BSmin2), where BSmin=18 (the maximum value of the first sorting result); the second sorting results are 16 (BSmax3), 19 (BSmax4), 20 (BSmax1), and 22 (BSmax2), where BSmax1=16 (the minimum value of the second sorting result).

[0059] Since BSmin(18)≥BSmax1(16), it indicates that there is a magnetic field range conflict. At this time, BSmin is used as the first boundary value, and the first value greater than BSmax1 (i.e., 19) is selected from the second sorting result as the second boundary value, so that the target magnetic field range is [18,19].

[0060] The target magnetic field range [18, 19] meets the freshness requirements of ingredients A, B, and D, but does not meet the freshness requirements of ingredient C. In other words, the adjusted target magnetic field orientation can meet the freshness requirements of 3 / 4 of the ingredients (ingredients A, B, and D), only sacrificing ingredient C.

[0061] It is understandable that after determining the target magnetic field range, if it is detected that the actual magnetic field strength in the food preservation device does not fall within the target magnetic field range, the magnetic field output is dynamically adjusted through the magnetic control component in the food preservation device to ensure that the preservation relief is always in the best state.

[0062] In one embodiment, the food preservation device further includes a magnetic control component. The magnetic field component is a device or apparatus component that can generate and control a magnetic field, and is used in the present invention to adjust the actual magnetic field strength within the food preservation device.

[0063] Specifically, when the actual magnetic field strength is lower than the lower limit of the target magnetic field range (i.e., the first boundary value), the magnetic control component should enhance the magnetic field output to meet the minimum preservation requirements of the food; conversely, if the actual magnetic field strength exceeds the upper limit of the target magnetic field range (the second boundary value), the magnetic field strength needs to be reduced to avoid over-magnetization damage to the food.

[0064] In one embodiment, after step S3, the determination method further includes the following steps.

[0065] Step S4: When the actual magnetic field strength in the food preservation device is not within the target magnetic field range, control the magnetic control component so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range.

[0066] In one specific embodiment, the magnetic control assembly includes a first assembly and a second assembly. The storage unit within the food preservation device is disposed between the first assembly and the second assembly. The first assembly is configured to generate a first magnetic field, and the second assembly is configured to generate a second magnetic field. The actual magnetic field strength at the storage unit is equal to the vector sum of the first magnetic field strength of the first magnetic field and the second magnetic field strength of the second magnetic field. In other words, the magnitude and direction of the actual magnetic field strength at the storage unit are determined based on the magnetic field strengths and directions of the first and second magnetic fields.

[0067] As shown in FIG. 4( a ), in a specific embodiment, step S4 may specifically include the following steps.

[0068] Step S411, determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same;

[0069] If so, skip to step S412A, and when the actual magnetic field strength is less than the first boundary value, increase the current provided by the power supply to the first component and / or the second component until the actual magnetic field strength at the storage unit falls within the target magnetic field range;

[0070] If not, jump to step S412B. When the actual magnetic field strength is less than the first boundary value, increase the current provided by the power supply to the first component and / or reduce the current provided by the power supply to the second component until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0071] As shown in FIG4( b ), in another specific embodiment, step S4 may specifically include the following steps.

[0072] Step S411, determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same;

[0073] If yes, the process jumps to step S412A', and when the actual magnetic field strength is greater than the second boundary value, the current provided by the power supply to the first component and / or the second component is reduced until the actual magnetic field strength at the storage unit falls within the target magnetic field range;

[0074] If not, jump to step S412B'. When the actual magnetic field strength is greater than the second boundary value, reduce the current provided by the power supply to the first component and / or increase the current provided by the power supply to the second component until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0075] In this way, dynamic correction of magnetic field strength is achieved through current regulation. When the magnetic fields are in the same direction, directly increasing or decreasing the current can quickly adjust the resulting magnetic field strength to fall within the target magnetic field range. When the magnetic fields are in opposite directions, asymmetric current adjustment changes the superposition effect of the magnetic field vectors, correcting both the strength and the direction.

[0076] In steps S412B and S412B', when the first and second magnetic fields at the storage unit are in opposite directions, the first magnetic field may be assumed to be in the forward direction. If the actual magnetic field strength is less than the first boundary value, the difference between the first and second magnetic field strengths is increased so that the actual magnetic field strength approaches or exceeds the first boundary value. Specifically, the current flowing through the first component is increased (i.e., the first magnetic field strength is enhanced), or the current flowing through the second component is decreased (i.e., the second magnetic field strength is weakened).

[0077] If the actual magnetic field strength exceeds the second threshold, the difference between the first and second magnetic field strengths must be reduced so that the actual magnetic field strength falls below the second threshold. Specifically, the current flowing through the first component is reduced (i.e., the first magnetic field strength is weakened), or the current flowing through the second component is increased (i.e., the second magnetic field strength is strengthened).

[0078] As shown in FIG. 5( a ), in another specific embodiment, step S4 may specifically include the following steps.

[0079] Step S421, determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same;

[0080] If so, skip to step S422A. When the actual magnetic field strength is less than the first boundary value, shorten the distance between the first component and the storage unit and / or shorten the distance between the second component and the storage unit until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0081] If not, jump to step S422B. When the actual magnetic field strength is less than the first boundary value, shorten the distance between the first component and the storage unit, and / or expand the distance between the second component and the storage unit until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0082] As shown in FIG. 5( b ), in another specific embodiment, step S4 may specifically include the following steps.

[0083] Step S421, determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same;

[0084] If yes, skip to step S422A'. When the actual magnetic field strength is greater than the second boundary value, increase the distance between the first component and the storage unit and / or increase the distance between the second component and the storage unit until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0085] If not, jump to step S422B'. When the actual magnetic field strength is greater than the second boundary value, increase the distance between the first component and the storage unit, and / or shorten the distance between the second component and the storage unit, until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

[0086] In this way, by using mechanical displacement to adjust the magnetic field distribution, specifically by changing the distance between the first component and the storage unit to control the attenuation of the first magnetic field, and / or controlling the distance between the second component and the storage unit to control the attenuation of the second magnetic field, the magnetic field strength is always stable in the optimal range suitable for the mixed preservation of multiple ingredients. The operation is simple and easy to implement, which improves the preservation effect.

[0087] In steps S422B and S422B', when the first and second magnetic fields at the storage unit are in opposite directions, the first magnetic field may be assumed to be in the positive direction. If the actual magnetic field strength is less than the first threshold, the difference between the first and second magnetic field strengths may be increased so that the actual magnetic field strength approaches or exceeds the first threshold. Specifically, the distance between the first component and the storage unit may be shortened (i.e., increasing the first magnetic field strength) or the distance between the second component and the storage unit may be increased (i.e., weakening the second magnetic field strength).

[0088] If the actual magnetic field strength exceeds the second threshold, the difference between the first and second magnetic field strengths needs to be reduced so that the actual magnetic field strength falls below the second threshold. Specifically, the distance between the first component and the storage unit is increased (i.e., the first magnetic field strength is weakened), or the distance between the second component and the storage unit is shortened (i.e., the second magnetic field strength is strengthened).

[0089] In one embodiment, the first component includes at least one of a first electromagnetic coil and a first permanent magnet, and the second component includes at least one of a second electromagnetic coil and a second permanent magnet. Accordingly, the storage unit is disposed between the first electromagnetic coil and the second electromagnetic coil; or, between the first electromagnetic coil and the second permanent magnet; or, between the first permanent magnet and the second electromagnetic coil; or, between the first permanent magnet and the second permanent magnet.

[0090] Based on this, the control of the magnetic field component in step S4 so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range includes at least one of the following specific embodiments.

[0091] In a specific embodiment, when the actual magnetic field strength in the food preservation device is less than the first boundary value, the power supply is controlled to provide the second electromagnetic coil with a current in the same direction as that of the first electromagnetic coil.

[0092] In this embodiment, the current directions of the first electromagnetic coil and the second electromagnetic coil are the same, the directions of the first magnetic field and the second magnetic field generated at the storage unit are the same, and the magnetic field strength of the corresponding third magnetic field (i.e., the actual magnetic field strength) is superimposed and enhanced, so that the actual magnetic field strength is increased from below the first boundary value to the target magnetic field range.

[0093] In a specific embodiment, when the actual magnetic field strength in the food preservation device is greater than the second boundary value, the power supply is controlled to provide a current in a direction opposite to that of the first electromagnetic coil to the second electromagnetic coil.

[0094] In this embodiment, the current directions of the first electromagnetic coil and the second electromagnetic coil are opposite, and the directions of the first magnetic field and the second magnetic field generated at the storage unit are opposite. The magnetic field strength of the corresponding third magnetic field (i.e., the actual magnetic field strength) is offset and weakened, so that the actual magnetic field strength drops from above the second boundary value to the target magnetic field range.

[0095] In one specific embodiment, when the first magnetic field generated by the first electromagnetic coil at the storage unit and the second magnetic field generated by the second electromagnetic coil at the storage unit are in the same direction, if the actual magnetic field strength within the food preservation device is less than the first boundary value, the current provided by the power supply to the first electromagnetic coil and / or the second electromagnetic coil is increased; and it is detected whether the actual magnetic field strength at the current storage unit is less than the first boundary value; if so, the distance between the first component and the storage unit and / or the distance between the second component and the storage unit is shortened until the actual magnetic field strength falls within the target magnetic field range. (i.e., a combination of step S412A and step S422A)

[0096] In one specific embodiment, when the first magnetic field generated by the first electromagnetic coil at the storage unit and the second magnetic field generated by the second electromagnetic coil at the storage unit are in the same direction, if the actual magnetic field strength within the food preservation device is greater than the second boundary value, the current provided by the power supply to the first electromagnetic coil and / or the second electromagnetic coil is reduced; and the actual magnetic field strength at the current storage unit is detected to be greater than the second boundary value; if so, the distance between the first component and the storage unit and / or the distance between the second component and the storage unit is increased until the actual magnetic field strength falls within the target magnetic field range. (i.e., combined steps S412A' and S422A')

[0097] Similarly, when the first magnetic field generated by the first electromagnetic coil at the placement unit is in opposite directions to the second magnetic field generated by the second electromagnetic coil at the placement unit, step S412B and step S422B, or step S412B' and step S422B' can be combined. For this, please refer to the previous description and will not be repeated here.

[0098] One embodiment of the present invention provides a computer-readable storage medium.

[0099] In one embodiment, a computer-readable storage medium stores a computer program executed by the processor mentioned above, or a method for determining the magnetic field strength of a food preservation device in any of the technical solutions mentioned above.

[0100] When the processor executes the computer program, it can execute the description of the method for determining the magnetic field strength of the food preservation device in any of the above technical solutions, so it will not be repeated here. In addition, the description of the beneficial effects of using the same method will not be repeated.

[0101] The computer-readable storage medium may include a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0102] In summary, the present invention provides a food preservation device and a magnetic field determination method thereof. By determining the maximum value among the minimum magnetic field intensities of all food ingredients as the first boundary value, it is ensured that all food ingredients can obtain the most basic magnetic field preservation requirements; then, based on the distribution relationship between the first boundary value and the maximum magnetic field intensity of each food ingredient, a value greater than the first boundary value is selected from the maximum magnetic field intensity as the second boundary value, so that when there is a conflict in the magnetic field requirements of multiple food ingredients, an optimized range that can cover the most food requirements and avoid damage to the food ingredients due to excessive magnetic fields can be found intelligently. This method adopts a dynamic adjustment mechanism, which can maximize compatibility with the special needs of more food ingredients, and significantly improve the utilization efficiency of magnetic field energy, thereby realizing precise preservation and energy-saving operation in scenarios where multiple food ingredients coexist.

[0103] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0104] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining the magnetic field strength of a food preservation device, characterized in that: include: Obtaining N minimum magnetic field intensities and N maximum magnetic field intensities corresponding to N types of food in the food preservation device; determining a first boundary value according to a maximum value among the N minimum magnetic field intensities, and selecting a magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value based on a distribution relationship between the first boundary value and the N maximum magnetic field intensities; A target magnetic field range is determined according to the first boundary value and the second boundary value.

2. The method for determining magnetic field strength according to claim 1, wherein: The selecting, based on the distribution relationship between the first boundary value and the N maximum magnetic field intensities, a magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value includes: When the maximum value among the N minimum magnetic field intensities is greater than or equal to the minimum value among the N maximum magnetic field intensities, the minimum magnetic field intensity greater than the first boundary value is selected from the N maximum magnetic field intensities as the second boundary value.

3. The method for determining magnetic field strength according to claim 1, wherein: The selecting, based on the distribution relationship between the first boundary value and the N maximum magnetic field intensities, a magnetic field intensity greater than the first boundary value from the N maximum magnetic field intensities as a second boundary value includes: When the maximum value among the N minimum magnetic field intensities is smaller than the minimum value among the N maximum magnetic field intensities, the minimum value of the N maximum magnetic field intensities is selected as the second boundary value.

4. The method for determining magnetic field strength according to claim 1, wherein: The food preservation device further includes a magnetic control component. After determining the target magnetic field range, the method further includes: When the actual magnetic field strength in the food preservation device is not within the target magnetic field range, the magnetic control component is controlled to generate an actual magnetic field strength within the food preservation device that falls within the target magnetic field range.

5. The method for determining magnetic field strength according to claim 4, wherein: The magnetic control component includes a first component and a second component. The storage unit in the food preservation device is arranged between the first component and the second component. The first component is used to generate a first magnetic field, and the second component is used to generate a second magnetic field. The actual magnetic field strength is equal to the vector sum of the magnetic field strengths of the first magnetic field and the second magnetic field.

6. The method for determining magnetic field strength according to claim 5, wherein: The controlling of the magnetic control component so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range includes: Determining whether the magnetic field directions of the first magnetic field and the second magnetic field are the same at the placement unit; If so, when the actual magnetic field strength is less than the first boundary value, the current provided by the power supply to the first component and / or the second component is increased until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, If so, when the actual magnetic field strength is greater than the second boundary value, the current provided by the power supply to the first component and / or the second component is reduced until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

7. The method for determining magnetic field strength according to claim 6, wherein: After determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same, the method further includes: If not, when the actual magnetic field strength is less than the first boundary value, increasing the current provided by the power supply to the first component and / or reducing the current provided by the power supply to the second component until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, If not, when the actual magnetic field strength is greater than the second boundary value, the current provided by the power supply to the first component is reduced, and / or the current provided by the power supply to the second component is increased, until the actual magnetic field strength at the storage unit falls within the target magnetic field range.

8. The method for determining magnetic field strength according to claim 5, wherein: The controlling of the magnetic control component so that the actual magnetic field strength generated in the food preservation device falls within the target magnetic field range includes: Determining whether the magnetic field directions of the first magnetic field and the second magnetic field are the same at the placement unit; If so, when the actual magnetic field strength is less than the first boundary value, shortening the distance between the first component and the storage unit and / or shortening the distance between the second component and the storage unit until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, If so, when the actual magnetic field strength is greater than the second boundary value, the distance between the first component and the storage unit is increased and / or the distance between the second component and the storage unit is increased.

9. The method for determining magnetic field strength according to claim 8, wherein: After determining whether the magnetic field directions of the first magnetic field and the second magnetic field at the placement unit are the same, the method further includes: If not, when the actual magnetic field strength is less than the first boundary value, shortening the distance between the first component and the storage unit, and / or increasing the distance between the second component and the storage unit, until the actual magnetic field strength at the storage unit falls within the target magnetic field range; and / or, If not, when the actual magnetic field strength is greater than the second boundary value, the distance between the first component and the placement unit is increased, and / or the distance between the second component and the placement unit is decreased, until the actual magnetic field strength at the placement unit falls within the target magnetic field range.

10. A food preservation device, characterized in that: include: a first electromagnetic coil, configured to generate a first magnetic field; The second component is arranged within the range of the first magnetic field, and includes a second electromagnetic coil and a storage unit, wherein the second electromagnetic coil is arranged at the storage unit, and the storage unit is used to place food; A control device for executing the steps of the method for determining the magnetic field strength of the food preservation device according to claims 1 to 9.

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