Refrigerator with negative ion purification function and using method thereof

Abstract

The invention relates to the technical field of refrigerators, and provides a refrigerator with a negative ion purification function and a use method thereof, the refrigerator comprises a refrigeration layer, a freezing layer, a calculation unit, a detection unit, a control unit and a negative ion generator; the negative ion generator comprises a high-voltage pack and a plurality of release media, and the high-voltage pack is used for outputting different voltages to different release media so as to provide a high-voltage electric field required by ionization; the refrigerating layer and the freezing layer comprise a plurality of storage layers which are sequentially divided based on food volatility; the detection unit is used for detecting the food volatility of each storage layer; the calculation unit is used for formulating corresponding negative ion requirements according to food volatility of different storage layers in the refrigeration layer and the freezing layer; the control unit controls the first output voltage of the high-voltage pack according to the negative ion demand to enable the release medium to release negative ions, and adjusts the output voltage of the high-voltage pack to the release medium of the storage layer according to the negative ion compensation and negative ion demand of the adjacent layer to obtain a second output voltage.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, in particular to a refrigerator with a negative ion purification function and a use method thereof. Background Art

[0002] As consumers' demand for food preservation increases, the sterilization and deodorization functions of refrigerators have become core competitive indicators. Negative ion purification technology is widely used in the refrigerator field due to its pollution-free and broad-spectrum antibacterial properties.

[0003] However, traditional negative ion generators use a fixed power output mode and are unable to adjust the release intensity based on the volatility of food. This can lead to localized over- or under-concentration, causing food oxidation or antibacterial failure. Existing layered refrigerators do not consider the diffusion effect of negative ions between adjacent storage layers. For example, negative ions from the high-volatility layer may over-cover the middle and lower layers, which in turn suppresses the need for active sterilization in the middle layer. Furthermore, current negative ion purification systems lack control accuracy and adaptability. For example, they cannot precisely adjust the negative ion concentration based on the characteristics of food in different areas of the refrigerator (such as volatility), resulting in inadequate preservation, antibacterial, and deodorization effects. Summary of the Invention

[0004] In response to the above-mentioned defects, the purpose of the present invention is to propose a refrigerator with negative ion purification function and a method of using the same, aiming to achieve precise matching of negative ion release intensity with food volatility characteristics through hierarchical adaptation and cross-layer compensation mechanism, thereby improving the preservation and antibacterial efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A refrigerator with a negative ion purification function, comprising a refrigeration layer, a freezing layer, a calculation unit, a detection unit, a control unit and a negative ion generator;

[0007] The negative ion generator includes a high-voltage package and a plurality of release media, wherein the high-voltage package is used to output different voltages to different release media to provide a high-voltage electric field required for ionization;

[0008] The refrigeration layer and the freezing layer include several storage layers divided in sequence based on the volatility of the food, and each storage layer is provided with a corresponding release medium;

[0009] The detection unit is used to measure the volatility of food in each storage layer respectively;

[0010] The calculation unit is used to formulate the corresponding negative ion requirements according to the volatility of food in different storage layers in the refrigeration layer and the freezer layer;

[0011] For each storage layer, the control unit controls the first output voltage of the high-voltage package according to the negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

[0012] Preferably, the storage layer is divided into a high volatility layer, a medium volatility layer and a low volatility layer from top to bottom.

[0013] Preferably, the system further comprises a first acquisition module and a negative ion neutralization unit, wherein a negative ion neutralization channel is provided in each storage layer, the negative ion neutralization module is connected to the negative ion neutralization channel in each storage layer, and the negative ion neutralization channel is used to release a neutralization medium to the corresponding negative ion neutralization channel to reduce the negative ion concentration;

[0014] The first acquisition module is used to obtain the negative ion concentration released by the release medium of the current storage layer and the negative ion compensation concentration of the adjacent layer, and superimpose the two;

[0015] In the control unit, for each time period, it is determined whether the superposition value exceeds the negative ion demand corresponding to the current storage layer;

[0016] If exceeded, perform at least one of the following actions:

[0017] Controlling the high-voltage package to reduce the output voltage to the release medium according to the degree of excess, or activating the negative ion neutralization channel and neutralizing the negative ions in the current storage layer according to the degree of excess;

[0018] If it does not exceed, the second output voltage of the high-voltage package is increased to approach the demand threshold according to the difference between the superposition value and the maximum value of the negative ion demand, and the connection between the negative ion neutralization channel and the negative ion neutralization unit is cut off.

[0019] Preferably, in the calculation unit, the calculation of the negative ion demand of the high volatility layer includes:

[0020] Obtain the detection results of the detection unit to detect whether there are multiple combinations of substances with volatile synergistic effects in the current storage layer;

[0021] If the detection unit detects a combination of substances with a synergistic volatilization effect, it generates a multi-level release control instruction based on the degree of overlap of the volatilization phases of the substances:

[0022] When the test result shows that the volatilization phases of the substances completely overlap, an exponential demand curve positively correlated with the superimposed volatilization rate is constructed;

[0023] When the volatilization phases of substances are staggered, the volatilization intensity peaks of each substance are segmented and matched based on the time window sliding mechanism;

[0024] If the volatilization rate of a single substance presents a discontinuous mutation, a disturbance response correction is performed:

[0025] Identify the inflection point of the volatilization rate curve, expand it forward to establish a negative ion pre-release buffer zone, and adjust the compensation for negative ion demand according to the slope of the rate change after the inflection point.

[0026] Preferably, the control unit includes:

[0027] Obtaining a first negative ion compensation amount diffused from the adjacent high volatility layer to the medium volatility layer, and performing a difference operation between the first negative ion compensation amount and the negative ion demand of the medium volatility layer;

[0028] Control the high voltage transformer output according to the difference operation result:

[0029] If the negative ion concentration of the release medium of the medium volatile layer and the first negative ion compensation amount interact to equal the negative ion demand, maintaining the first output voltage of the high voltage package to the release medium of the medium volatile layer;

[0030] If the negative ion concentration of the release medium of the middle volatile layer and the first negative ion compensation amount is less than the negative ion requirement, the output voltage of the high-voltage package is increased in proportion to the difference until the upper threshold of the negative ion requirement is reached;

[0031] If the negative ion concentration of the release medium of the mid-volatile layer exceeds the negative ion demand after interaction with the first negative ion compensation amount, the negative ion neutralization channel of the current layer is activated to reduce the concentration.

[0032] Preferably, the control unit includes:

[0033] The spatial attenuation characteristics of the compensation amount of the high volatility layer during the transfer process to the low volatility layer are obtained. The invalid compensation components are eliminated based on the electric field interference between the layers to obtain the negative ion compensation amount of the high volatility layer to the low volatility layer.

[0034] The amount of negative ions compensated by the medium volatility layer for the low volatility layer is calculated by the attenuation coefficient and the negative ion concentration of the medium volatility layer;

[0035] The negative ion compensation amount of the medium volatility layer to the low volatility layer and the negative ion compensation amount of the high volatility layer to the low volatility layer are vectorially superimposed in the edge region of the low volatility layer to generate the negative ion compensation amount corresponding to the low volatility layer.

[0036] Preferably, the negative ion compensation of adjacent layers satisfies the relationship:

[0037]

[0038] Among them, k represents the sedimentation attenuation coefficient between adjacent layers, C0 represents the negative ion concentration in the upper layer, z represents the vertical height between adjacent storage layers, Q represents the negative ion release intensity in the lower layer, D represents the diffusion capacity of negative ions in the low-temperature environment inside the refrigerator, and A represents the cross-sectional area of effective diffusion inside the refrigerator.

[0039] Preferably, a prediction unit is further included, and the prediction unit includes:

[0040] Count the historical door opening time distribution and identify periodic high-frequency door opening periods;

[0041] Extract the door opening interval and duration characteristics within the current time window. If it is predicted that the next time period will be a high-frequency door opening period, then: reduce the negative ion release concentration of all storage layers to the basic maintenance level, and cache the unreleased negative ion demand into the queue according to priority;

[0042] If it is predicted that there will be no door opening operation in the next time period, then: the release concentration of the corresponding storage layer is increased according to the cumulative demand of the cache queue, and the cache demand that has been released is cleared.

[0043] A method for using a refrigerator with a negative ion purification function, the method being applied to the refrigerator as described above, the method comprising the following steps:

[0044] S1: The refrigeration layer and the freezer layer are divided into several storage layers based on the volatility of food;

[0045] S2: Develop corresponding negative ion requirements based on the volatility of food in different storage layers in the refrigeration layer and the freezer layer;

[0046] S3: For each storage layer, the first output voltage of the high-voltage package is controlled according to the first negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

[0047] One of the above technical solutions has the following advantages or beneficial effects:

[0048] By dividing the refrigerated and frozen layers into multiple storage layers and determining the negative ion requirements of each storage layer based on the volatility of the food, this invention achieves precise control of negative ion release, overcoming the inaccurate negative ion release problem of traditional refrigerators and avoiding localized overly high or insufficient concentrations, thereby meeting the preservation and sterilization requirements of different food ingredients. The invention also takes into account the negative ion diffusion effect between adjacent storage layers. By dynamically adjusting the output voltage of the high-voltage transformer by obtaining the negative ion compensation amount of adjacent layers, the negative ion concentration of each storage layer is optimized, reducing the problem of negative ion waste or deficiency and improving the preservation and sterilization performance. Furthermore, the refrigerator is equipped with a negative ion neutralization channel in each storage layer, which can promptly neutralize excess negative ions, avoiding the adverse effects of localized excessive concentrations on food, while also saving energy. For the high volatility layer, the refrigerator can detect combinations of substances with volatile synergistic effects and perform multi-level release control, precisely responding to the complex volatility characteristics of highly volatile foods and ensuring that negative ion release matches the pattern of food odor release, achieving efficient deodorization while avoiding waste. It also obtains the negative ion compensation amount of the high volatility layer and the medium volatility layer for the low volatility layer, and performs vector superposition at the edge of the low volatility layer to generate the corresponding negative ion compensation amount, providing more precise negative ion concentration control for the low volatility layer and further improving the preservation effect. The negative ion release regulation mechanism based on door opening behavior prediction predicts the door opening period by statistically analyzing the historical door opening time distribution and extracting door opening features, rationally adjusting the negative ion release concentration, reducing the negative ion waste caused by frequent door opening, and ensuring that a stable negative ion concentration field is quickly restored during the period when the door is not opened, achieving a dynamic balance between energy consumption and purification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0050] Figure 1 1 is a schematic structural diagram of a refrigerator with a negative ion purification function provided by an embodiment of the present invention;

[0051] Figure 2 The present invention provides a flowchart of a method for using a refrigerator with a negative ion purification function. DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0053] In the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such 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 the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0054] A refrigerator with negative ion purification function, such as Figure 1 As shown, in a preferred embodiment of the present invention, the refrigerator includes a refrigeration layer, a freezing layer, a calculation unit, a detection unit, a control unit and a negative ion generator;

[0055] The negative ion generator includes a high-voltage package and a plurality of release media, wherein the high-voltage package is used to output different voltages to different release media to provide a high-voltage electric field required for ionization;

[0056] The refrigeration layer and the freezing layer include several storage layers divided in sequence based on the volatility of the food, and each storage layer is provided with a corresponding release medium;

[0057] The detection unit is used to measure the volatility of food in each storage layer respectively;

[0058] The calculation unit is used to formulate the corresponding negative ion requirements according to the volatility of food in different storage layers in the refrigeration layer and the freezer layer;

[0059] For each storage layer, the control unit controls the first output voltage of the high-voltage package according to the negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

[0060] The release medium in each storage layer is different. The high-voltage transformer can output voltages corresponding to different release media. For example, 220V AC input is used. The EMC circuit first suppresses electromagnetic interference, minimizing the impact on the power supply and equipment. A rectifier and filter circuit then converts the AC into DC and removes ripple to produce a smooth DC current. This power then enters the switching power supply circuit, which stabilizes the output voltage and regulates the power, providing an appropriate input for the transformer. The transformer then steps down the voltage, outputting a low voltage (e.g., 12V) for the high-voltage transformer and other circuits, ensuring safe and stable operation. The MCU then transmits control signals to the transformer's switching circuit, which, in conjunction with the self-oscillating circuit, converts the low voltage into a negative high voltage (e.g., -5kV). This ionizes the air and generates negative charges, ultimately causing the negative charges to combine with oxygen to form negative oxygen ions, effectively purifying the air.

[0061] Among them, the detection unit can be a volatile organic compound (VOC) sensor, which can detect the volatile organic compound content in the air and can perform quantitative or qualitative analysis on volatile substances such as odor molecules released by food; it can also be a gas sensor array, which is composed of a variety of different types of gas sensors and can simultaneously detect a variety of gas components and their concentrations, and can more comprehensively obtain food volatility information in the storage layer. The refrigeration layer and the freezer layer are different temperature areas in the refrigerator for storing food, providing a suitable refrigeration or freezing environment for food; the calculation unit formulates the corresponding negative ion requirements according to the volatility of food in different storage layers in the refrigeration layer and the freezer layer, providing a basis for subsequent control; the control unit actually controls the output voltage of the high-voltage package of the negative ion generator according to the negative ion requirements formulated by the calculation unit, ensuring that the release medium can release negative ions on demand, and is the key link connecting calculation and execution; the negative ion generator includes a high-voltage package and several release media. The high-voltage package is used to provide the negative high-voltage electric field required for ionization to the release medium, and the release medium releases negative ions under the action of the negative high-voltage electric field. It is the core component for generating negative ions; the storage layer is the refrigeration layer and the freezer layer. The areas are divided in sequence based on the volatility of food. Each storage layer corresponds to different negative ion function requirements. The high volatility storage layer corresponds to the requirement of deodorization, the medium volatility storage layer corresponds to the requirement of sterilization, and the low volatility storage layer corresponds to the requirement of preservation. This division enables negative ions to play a targeted role to meet the storage requirements of different foods; the second output voltage is a more accurate output voltage obtained after comprehensively considering the negative ion compensation and negative ion requirements of adjacent layers in the control process. It is used to further optimize the negative ion release effect and ensure that each storage layer can obtain the appropriate negative ion concentration. The second voltage is obtained after optimization, so the second voltage can not only accurately control the negative ion concentration, but also reduce unnecessary energy consumption.

[0062] In general, by dividing the refrigeration layer and the freezing layer into storage layers based on the volatility of food, and setting corresponding release media in each storage layer, a physical basis can be provided for the targeted release of negative ions; the calculation unit formulates precise negative ion requirements according to the volatility of food in different storage layers to ensure that the release of negative ions has a clear target basis; the control unit controls the output voltage of the high-voltage package according to the negative ion demand to make the release medium start to release negative ions, which is the basic operation to realize the negative ion purification function; and in the control process, the negative ion compensation and negative ion demand of the adjacent layers are considered to adjust the output voltage to obtain the second output voltage, which effectively solves the interference problem caused by the diffusion of negative ions in adjacent storage layers, so that each storage layer can obtain the negative ion concentration that meets the characteristics of its food, the high storage layer can effectively remove odors, the medium volatility storage layer achieves good sterilization, and the low volatility storage layer achieves high-quality preservation effect, thereby giving full play to the preservation, antibacterial and deodorization functions of the refrigerator, overcoming the shortcomings of traditional technologies in control accuracy and adaptability, improving the refrigerator's satisfaction with different food storage needs, and enhancing the user experience.

[0063] Preferably, the storage layer is divided into a high volatility layer, a medium volatility layer and a low volatility layer from top to bottom.

[0064] Specifically, highly volatile foods such as onions and garlic release more odor molecules. Placing them in the high volatility layer, i.e. the upper layer, can prevent their odor from spreading quickly throughout the refrigerator and infecting other foods; various medium-volatile foods such as fruits and vegetables have relatively moderate volatile components. When stored in the middle layer, the negative ion concentration released by the middle layer release medium can meet the sterilization requirements while not excessively damaging the surface tissue structure of these foods, avoiding poor preservation effects or microbial growth problems caused by excessively high or low negative ion concentrations, and maintaining the freshness and nutritional value of food; low-volatile foods such as meat have relatively slow odor release, and are located at the bottom layer, which can reduce the interference of the odor of high-volatile foods in the upper layer. At the same time, the relatively moderate negative ion concentration released by the lower layer release medium can effectively maintain the stability of the microenvironment of low-volatile foods such as meat, inhibit microbial reproduction, achieve better preservation effects, and prevent meat from spoiling.

[0065] Because food volatility and negative ion characteristics are clearly divided into layers, the calculation unit can more accurately determine the corresponding negative ion demand based on the volatility of food in different storage layers. The control unit can also more accurately control the output voltage of the high-voltage package to the release medium, thereby controlling the negative ion concentration released by different release media at the same time. For the low volatility layer, due to its relatively low negative ion demand, the negative ions released in the high volatility layer and the medium volatility layer have a certain downward diffusion effect. The negative ion compensation corresponding to this division can reduce the voltage output of the low volatility layer, thereby reducing power output while maintaining the preservation effect, achieving the goal of energy saving.

[0066] Preferably, the system further comprises a first acquisition module and a negative ion neutralization unit, wherein a negative ion neutralization channel is provided in each storage layer, the negative ion neutralization module is connected to the negative ion neutralization channel in each storage layer, and the negative ion neutralization channel is used to release a neutralization medium to the corresponding negative ion neutralization channel to reduce the negative ion concentration;

[0067] The first acquisition module is used to obtain the negative ion concentration released by the release medium of the current storage layer and the negative ion compensation concentration of the adjacent layer, and superimpose the two;

[0068] In the control unit, for each time period, it is determined whether the superposition value exceeds the negative ion demand corresponding to the current storage layer;

[0069] If exceeded, perform at least one of the following actions:

[0070] Controlling the high-voltage package to reduce the output voltage to the release medium according to the degree of excess, or activating the negative ion neutralization channel and neutralizing the negative ions in the current storage layer according to the degree of excess;

[0071] If it does not exceed the value, the second output voltage of the high-voltage package is increased to approach the demand threshold value according to the difference between the superposition value and the maximum value of the negative ion demand, and the connection between the negative ion neutralization channel and the negative ion neutralization unit is cut off. Among them, the negative ion neutralization channel refers to a specific channel or device set in each storage layer for neutralizing excess negative ions, such as using a catalyst to neutralize excess negative ions. In addition, excess negative ions can be neutralized by principles such as electrostatic adsorption. When the negative ion concentration of a certain storage layer is too high, the excess negative ions can be neutralized by activating the connection between the negative ion neutralization channel corresponding to the storage layer and the negative ion neutralization unit, thereby avoiding the adverse effects of excessive negative ion concentration on food and helping to save electricity. When obtaining the negative ion concentration released by the release medium of the current storage layer and the negative ion compensation concentration of the adjacent layer, the corresponding sensor or detection equipment can be used to collect the negative ion concentration released by the release medium of the current storage layer and the negative ion compensation concentration of the adjacent layer. Its function is to provide accurate data support for subsequent concentration superposition and judgment. Superposition refers to the negative ion concentration of the current storage layer. The degree of negative ion concentration is combined with the negative ion compensation concentration of the adjacent layers for calculation, such as weighted superposition or time-series attenuation compensation superposition, so that the comprehensive influence of the current layer and the adjacent layers on the negative ion concentration can be comprehensively considered, making subsequent judgments more accurate; the time period refers to the pre-set time interval for judging and adjusting the negative ion concentration, which is to ensure that the system can regularly evaluate and adjust the negative ion concentration to ensure the stability of the negative ion environment; the superposition value refers to the actual negative ion concentration value of the current storage layer obtained after the superposition calculation, which is used to compare with the negative ion demand; the degree of exceedance refers to the specific value of the superposition value exceeding the negative ion demand, which is used to determine the degree of control measures to be taken; the highest value refers to the maximum value of the difference between the superposition value and the negative ion demand, which is used to judge the amplitude of the output voltage increase; the demand threshold refers to the standard value of the negative ion concentration required by the current storage layer, which is used as the target for adjusting the negative ion concentration.

[0072] In general, the negative ion neutralization channel set up in each storage layer provides an effective means for dealing with excess negative ions. When the negative ion concentration is too high, it can be neutralized in time to avoid adverse effects of local high concentration on food. Secondly, by obtaining the negative ion concentrations of the current storage layer and the adjacent layers and performing superposition calculations, the actual negative ion concentrations of each layer can be fully and accurately grasped, providing reliable data support for subsequent judgment and control. Then, the superposition value is judged in each time period, and corresponding control measures are taken according to whether it exceeds the negative ion demand. This can not only ensure that the negative ion concentration meets the needs of food preservation and sterilization, but also avoid energy waste caused by excessive release of negative ions. Finally, the negative ion concentration is controlled by reducing the output voltage of the high-voltage package or activating the negative ion neutralization channel, and by increasing the output voltage and closing the neutralization channel when it does not exceed the demand, precise regulation of the negative ion concentration and energy-saving operation are achieved.

[0073] In the actual measurement of the high volatility storage layer, which stores highly volatile ingredients such as onions and durian, the negative ion neutralization channel is linked to the voltage regulation control: when the current layer release concentration is detected to be 800ions / cm 3 When considering the influence of the adjacent layer on the high volatility storage layer, the compensation concentration of the adjacent middle layer is 400 ions / cm 3 When (i.e., the effect of the medium volatile storage layer on the high volatile storage layer is to increase the negative ion concentration of the high volatile storage layer by 400ions / cm 3 ), the superposition value reaches 1200ions / cm 3 , exceeding the preset demand threshold of 1000ions / cm 3 The control unit reduces the output voltage of the high-voltage package from -5kV to -3kV according to the 20% excess, and activates the neutralization channel to work at a rate of reducing the concentration by several times per minute. After 5 minutes, the concentration stabilizes at 950ions / cm 3 , the error is controlled within the range of ±3%, and the ozone generation is reduced by 38% compared with the traditional non-compensated solution; when strawberries are stored in the low volatility layer, the superposition value is only 780ions / cm 3 , the required threshold is 1000ions / cm 3 The control unit increases the voltage from -3kV to -4.2kV, so that the concentration reaches 1020ions / cm within 3 time periods. 3 , each time period is set to 5 minutes.

[0074] Preferably, in the calculation unit, the calculation of the negative ion demand of the high volatility layer includes:

[0075] Obtain the detection results of the detection unit to detect whether there are multiple combinations of substances with volatile synergistic effects in the current storage layer;

[0076] If the detection unit detects a combination of substances with a synergistic volatilization effect, it generates a multi-level release control instruction based on the degree of overlap of the volatilization phases of the substances:

[0077] When the test result shows that the volatilization phases of the substances completely overlap, an exponential demand curve positively correlated with the superimposed volatilization rate is constructed;

[0078] When the volatilization phases of substances are staggered, the volatilization intensity peaks of each substance are segmented and matched based on the time window sliding mechanism;

[0079] If the volatilization rate of a single substance presents a discontinuous mutation, a disturbance response correction is performed:

[0080] Identify the inflection point of the volatilization rate curve, expand it forward to establish a negative ion pre-release buffer zone, and adjust the compensation for negative ion demand according to the slope of the rate change after the inflection point.

[0081] First, the current storage layer is checked for the presence of multiple combinations of substances with synergistic volatilization effects. This is because the interaction between different volatile substances will affect the overall odor release pattern, thereby affecting the demand for negative ions. If a combination of substances with synergistic volatilization effects is detected, a multi-level release control instruction is generated based on the degree of overlap of the substance volatilization phases. This is because the overlap or interleaving of the volatilization phases will change the dynamic process of the interaction between negative ions and odor molecules. For the detection of substance combinations with synergistic volatilization effects, MOS array detection can be used. When the volatilization phases of the substances completely overlap, an exponential demand curve is constructed that is positively correlated with the superimposed volatilization rate. Because multiple substances evaporate simultaneously at this time, the concentration of odor molecules rises rapidly, and an exponential increase in the negative ion concentration is required to effectively remove odors. When the volatilization phases of the substances are staggered, the volatilization intensity peaks of each substance are matched in segments based on the time window sliding mechanism. The volatilization peaks of different substances are captured by sliding the time window to achieve segmented and precise control of negative ion release, ensuring that there are sufficient negative ions for deodorization during each peak period. If the volatilization rate of a single substance presents a discontinuous mutation, a disturbance response correction is performed to identify the inflection point of the volatilization rate curve and establish a pre-release buffer zone. At the same time, the negative ion demand compensation is adjusted according to the slope of the rate change after the inflection point. This is to cope with sudden changes in the volatilization process of the substance, adjust the negative ion release strategy in advance, and ensure that the negative ion concentration in the entire volatilization process always matches the deodorization demand, thereby realizing the efficient deodorization function of the high volatility layer and avoiding waste or insufficient negative ion release.

[0082] Among them, the volatility synergistic effect refers to the phenomenon that the interaction of multiple volatile substances leads to changes in the odor release pattern. Its existence means that more complex regulation of negative ion release is needed; the volatilization phase of a substance refers to the different stages and time characteristics of the substance volatilization process. The overlapping or staggered phases directly affect the timing and intensity of the interaction between negative ions and odor molecules; the multi-level release control instruction refers to the negative ion release commands of different levels and time sequences generated according to the characteristics of the volatilization phase, which is used to accurately adjust the amount of negative ion release; the time window sliding mechanism refers to a method of moving the observation window on the time axis, segmented analysis and matching the volatilization intensity peaks of each substance, which can achieve refined control of the staggered volatilization phase; the inflection point refers to the key turning point on the emission rate curve. Its position identification and subsequent processing are crucial for dealing with discontinuous mutations in the volatilization rate; the negative ion pre-release buffer zone refers to an area for early release of negative ions established in front of the inflection point, which is used to smooth the impact of changes in the volatilization rate; compensation refers to the adjustment of negative ion demand according to the slope of the rate change after the inflection point to ensure that the negative ion release is adapted to the actual volatilization situation.

[0083] In one embodiment, during a computational unit test of a high-volatility storage layer, when onions and apples were mixed, the gas sensor array analyzed the types of volatile organic compounds (VOCs) and identified the synergistic release effect of ethylene and esters: the ethylene release rate was 0.8 mg / h when onions were stored alone, and 1.2 mg / h when apples were stored alone. However, after mixing, the actual total release rate reached 2.5 mg / h due to the synergistic effect. The system constructed an exponential demand curve (coefficient k = 1.2) based on the degree of phase overlap, causing the negative ion concentration to increase from 800 ions / cm3 to 1.20 ions / cm3 within 15 minutes. 3 Increased to 1350ions / cm 3 When the volatilization phases of durian and mango are staggered (peak interval is 1.5 hours), the system detects the temporal release characteristics of the mixed odor through the sensor array, activates the time window sliding mechanism, and segments the volatile peaks of 0.9mg / h and 0.6mg / h of the two substances in a 30-minute cycle, dynamically adjusting the negative ion concentration from 850ions / cm 3 Step up to 1050ions / cm 3 For durian stored alone, a discontinuous mutation was detected in the third hour when the volatilization rate suddenly increased from 0.6 mg / h to 1.8 mg / h. The system established a pre-release buffer 30 minutes before the inflection point and adjusted the negative ion demand compensation from 800 ions / cm 3 Increased to 1550ions / cm 3 , and controls the fluctuation amplitude of the concentration. This embodiment effectively verifies the effectiveness of the synergistic effect identification and dynamic compensation mechanism through multi-source sensor data fusion and nonlinear demand modeling, achieving the dual goals of odor suppression and energy consumption optimization.

[0084] Preferably, the control unit includes:

[0085] Obtaining a first negative ion compensation amount diffused from the adjacent high volatility layer to the medium volatility layer, and performing a difference operation between the first negative ion compensation amount and the negative ion demand of the medium volatility layer;

[0086] Control the high voltage transformer output according to the difference operation result:

[0087] If the negative ion concentration of the release medium of the medium volatile layer and the first negative ion compensation amount interact to equal the negative ion demand, maintaining the first output voltage of the high voltage package to the release medium of the medium volatile layer;

[0088] If the negative ion concentration of the release medium of the middle volatile layer and the first negative ion compensation amount is less than the negative ion requirement, the output voltage of the high-voltage package is increased in proportion to the difference until the upper threshold of the negative ion requirement is reached;

[0089] If the negative ion concentration of the release medium of the mid-volatile layer exceeds the negative ion demand after interaction with the first negative ion compensation amount, the negative ion neutralization channel of the current layer is activated to reduce the concentration.

[0090] Specifically, when the control unit is running, it first obtains the first negative ion compensation amount diffused from the adjacent high volatility layer to the medium volatility layer through sensor measurement or mathematical model calculation, and performs a difference operation with the negative ion demand of the medium volatility layer to accurately grasp the gap between the actual negative ion concentration and the demand. According to the difference result, if the current negative ion concentration meets the demand, the output voltage of the high-voltage package is maintained to ensure the stable operation of the system; if it is lower than the demand, the voltage is increased according to the difference ratio, and the negative ion release is rapidly increased until the upper limit of the demand is reached to ensure that the medium volatility layer has enough negative ions for sterilization; if it exceeds the demand, the negative ion neutralization channel is activated to promptly reduce the excess negative ion concentration to avoid adverse effects on food and energy. Through this precise and dynamic control method, the negative ion concentration of the medium volatility layer is always maintained at the optimal level to meet the sterilization requirements, while avoiding the problem of too high or too low negative ion concentration, effectively improving the refrigerator's freshness preservation and antibacterial performance, reducing energy consumption, and improving the overall use effect and user experience.

[0091] In one embodiment, the high volatility layer stores food such as onions and durian. The interlayer ion sensor array obtains the first negative ion compensation amount diffused into the medium volatility layer in real time at a sampling frequency of once per second. The specific value is 650 ions / cm 3 The default negative ion requirement for the volatile layer is 1200ions / cm 3 , the difference calculation yields 550ions / cm 3 When the negative ion concentration of the release medium of the volatile layer is detected to be 500ions / cm 3 The total concentration after adding the compensation amount is 1150 ions / cm 3 (Below the required threshold of 1200ions / cm 3 ), the control unit increases the output voltage of the high-voltage package from the initial -4.2kV to -6.5kV according to the difference ratio, so that the concentration of the release medium increases to 1220ions / cm within two time cycles (each cycle is 3 minutes). 3 In another test scenario, when meat was stored in the volatile layer, the concentration after the compensation amount was superimposed reached 1350 ions / cm 3 (Exceeding the required threshold of 1200ions / cm 3 ) when the neutralization channel is activated to eliminate 200 ions / cm per minute. 3 The rate was set, and the high voltage package voltage was reduced from -6.5kV to -4.0kV. After 10 minutes, the concentration was stabilized at 1180ions / cm 3Through real-time compensation adjustment and dynamic voltage control, the continuous optimization of the middle layer's antibacterial performance is ensured, while reducing energy waste caused by the release of ineffective negative ions.

[0092] Preferably, the control unit includes:

[0093] The spatial attenuation characteristics of the compensation amount of the high volatility layer during the transfer process to the low volatility layer are obtained. The invalid compensation components are eliminated based on the electric field interference between the layers to obtain the negative ion compensation amount of the high volatility layer to the low volatility layer.

[0094] The amount of negative ions compensated by the medium volatility layer for the low volatility layer is calculated by the attenuation coefficient and the negative ion concentration of the medium volatility layer;

[0095] The negative ion compensation amount of the medium volatility layer to the low volatility layer and the negative ion compensation amount of the high volatility layer to the low volatility layer are vectorially superimposed in the edge region of the low volatility layer to generate the negative ion compensation amount corresponding to the low volatility layer.

[0096] Among them, the spatial attenuation characteristic refers to the concentration attenuation law of negative ions during cross-layer transmission due to increased distance, physical barrier obstruction and air resistance (the influence of air outlet in the refrigerator). Its function is to establish a transmission loss model of the compensation amount to distinguish effective / invalid components; the electric field interference effect refers to the distortion effect of the electric field generated by the release medium of the adjacent layer on the migration path of the compensation ions, which is used to correct the actual action path of the compensation amount; the invalid compensation component refers to the amount of negative ions that cannot reach the target area or lose their activity due to spatial attenuation or electric field interference. After elimination, resource waste can be avoided; the attenuation coefficient is the proportional coefficient of the weakening of the compensation conduction by the negative ion concentration of the medium-volatile layer itself, reflecting the carrying capacity of the current state of the layer for cross-layer compensation; vector superposition refers to the vector synthesis of compensation amounts from different sources according to the spatial distribution direction (such as airflow direction, electric field gradient direction) at the edge of the low-volatility layer. Its function is to optimize the spatial coverage uniformity of the compensation field.

[0097] In the actual operation of the control unit, the high volatility layer stores ingredients such as onions and durian. The electric field strength sensor at the junction of the layers obtains the compensation amount at a sampling frequency of twice per second and transmits it to the low volatility layer. The spatial attenuation characteristics: the initial compensation amount of the high volatility layer is detected to be 850ions / cm 3 After distance attenuation and electric field interference (metal shielding effect of the inner wall of the cold storage layer), the effective compensation amount is reduced to 520ions / cm 3 The system uses a built-in bandpass filter in the microprocessor to remove invalid interference components with a frequency lower than 10 Hz (such as electric field fluctuations caused by compressor vibration), and ultimately determines that the actual compensation amount of the high volatility layer to the low volatility layer is 500 ions / cm 3 At the same time, the negative ion concentration when storing meat in the volatile layer is 1100ions / cm3 Combined with the preset attenuation coefficient of 0.35, the compensation amount of the medium volatility layer to the low volatility layer is calculated to be 385ions / cm 3 Ion sensor arrays were deployed at the four corners of the low-volatility layer edge area. The two compensation values were vector-superimposed according to the azimuth angle (the compensation direction of the high-volatility layer was vertical downward, and the compensation direction of the medium-volatility layer was horizontal at a 30° angle). The resulting compensation value was 620 ions / cm 3 ; Based on this value, the output voltage of the low-volatility layer high-voltage transformer is dynamically adjusted from -3.5kV to -4.8kV, so that the preservative negative ion concentration of low-volatility ingredients such as strawberries is stably maintained in the target range, while suppressing the electric field disorder caused by invalid compensation. Through multi-source data fusion and space vector superposition algorithm, the accuracy and reliability of the cross-layer compensation mechanism are verified.

[0098] Preferably, the negative ion compensation of adjacent layers satisfies the relationship:

[0099]

[0100] Among them, k represents the sedimentation attenuation coefficient between adjacent layers, C0 represents the negative ion concentration in the upper layer, z represents the vertical height between adjacent storage layers, Q represents the negative ion release intensity in the lower layer, D represents the diffusion capacity of negative ions in the low-temperature environment inside the refrigerator, and A represents the cross-sectional area of effective diffusion inside the refrigerator.

[0101] Specifically, C0 represents the initial concentration of negative ions released from the upper storage layer (e.g., the high volatility layer), in ions / cm 3 C0 is the basic input value for cross-layer compensation and is transferred to the lower layer through the attenuation factor. The higher C0 is, the greater the contribution to the compensation of the lower layer is, but it decays exponentially with the vertical height z. k represents the attenuation rate of negative ions in the vertical diffusion process affected by factors such as gravity and airflow resistance. Its function is to quantify the degree of loss in cross-layer transmission. The larger the k value (such as the strong sealing of the cold storage layer), the faster the attenuation. k and z jointly determine the attenuation amplitude of the upper layer concentration (e -kz When it approaches 0, the contribution of the upper layer can be ignored. z represents the vertical height between adjacent storage layers, such as the distance from the high-volatility layer to the middle layer, and is measured in cm. This directly affects the degree of concentration attenuation in the upper layer. A larger z indicates a weaker compensation effect in the upper layer. Q represents the negative ion release intensity of the lower layer, specifically the rate at which negative ions are generated by the release medium itself. Excessive release intensity from the lower layer can affect the diffusion of negative ions from the upper layer. A represents the effective diffusion cross-sectional area within the refrigerator, which limits or enhances the lateral diffusion range of ions and affects the effective coverage of the release intensity from the lower layer.

[0102] Preferably, a prediction unit is further included, and the prediction unit includes:

[0103] Count the historical door opening time distribution and identify periodic high-frequency door opening periods;

[0104] Extract the door opening interval and duration characteristics within the current time window. If it is predicted that the next time period will be a high-frequency door opening period, then: reduce the negative ion release concentration of all storage layers to the basic maintenance level, and cache the unreleased negative ion demand into the queue according to priority;

[0105] If it is predicted that there will be no door opening operation in the next time period, then: the release concentration of the corresponding storage layer is increased according to the cumulative demand of the cache queue, and the cache demand that has been released is cleared.

[0106] Among them, the high-frequency door opening period refers to the periodic time period in which the door opening frequency is significantly higher than the average level determined by statistical analysis, which is used to predict the high-risk window of the negative ion field being disturbed by the outside world; the basic maintenance level refers to the operating mode of maintaining the minimum effective negative ion concentration by reducing the voltage or pulse frequency of the release medium without affecting the basic freshness of the food. Its function is to reduce invalid release during the door opening interference period; the cache queue refers to the storage sequence of unreleased negative ion demands sorted by priority, where the priority can be dynamically adjusted by the volatility level of the storage layer or the real-time pollution monitoring data, to ensure the timeliness of compensation in key areas; the cumulative demand enhancement refers to the concentrated release of the accumulated demand in the cache queue during the interference-free period through gradient boosting or pulse superposition, which is used to quickly rebuild a stable negative ion concentration field.

[0107] Dynamic pre-regulation of negative ion release is achieved through historical data modeling and real-time behavior analysis. First, the historical door opening time distribution is statistically analyzed to identify periodic high-frequency periods (such as daily breakfast and dinner periods), and a time-correlation model of door opening behavior is established. Its purpose is to predict the risk of negative ion concentration field disorder caused by frequent door opening in the future. When it is predicted that the next cycle will be in a high-frequency period, the negative ion release concentration of all layers will be actively reduced to the basic maintenance level (only maintaining the minimum antibacterial requirements), and the unreleased negative ion demand will be cached according to priority (such as the high volatility layer demand is stored first) to avoid resource waste caused by excessive escape of negative ions due to frequent door opening; conversely, when no door opening operation is predicted, the release concentration is increased according to the cumulative demand of the cache queue, and the historical under-release is quickly filled through a pulse compensation mechanism to ensure the recovery efficiency of the concentration field. This mechanism achieves a dynamic balance between energy consumption and purification efficiency through the time shift of demand.

[0108] A method for using a refrigerator with a negative ion purification function, such as Figure 2 As shown, the method of use is applied to the refrigerator as described above, and the method of use comprises the following steps:

[0109] S1: The refrigeration layer and the freezer layer are divided into several storage layers based on the volatility of food;

[0110] S2: Develop corresponding negative ion requirements based on the volatility of food in different storage layers in the refrigeration layer and the freezer layer;

[0111] S3: For each storage layer, the first output voltage of the high-voltage package is controlled according to the first negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

[0112] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0113] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A refrigerator with a negative ion purification function, characterized in that: The refrigerator comprises a refrigeration layer, a freezing layer, a calculation unit, a detection unit, a control unit and a negative ion generator; The negative ion generator includes a high-voltage package and a plurality of release media, wherein the high-voltage package is used to output different voltages to different release media to provide a high-voltage electric field required for ionization; The refrigeration layer and the freezing layer include several storage layers divided in sequence based on the volatility of the food, and each storage layer is provided with a corresponding release medium; The detection unit is used to measure the volatility of food in each storage layer respectively; The calculation unit is used to formulate the corresponding negative ion requirements according to the volatility of food in different storage layers in the refrigeration layer and the freezer layer; For each storage layer, the control unit controls the first output voltage of the high-voltage package according to the negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

2. The refrigerator with negative ion purification function according to claim 1, characterized in that: The storage layer is divided into a high volatility layer, a medium volatility layer and a low volatility layer from top to bottom.

3. The refrigerator with negative ion purification function according to claim 2, characterized in that: It also includes a first acquisition module and a negative ion neutralization unit, wherein a negative ion neutralization channel is provided in each storage layer, the negative ion neutralization module is connected to the negative ion neutralization channel in each storage layer, and the negative ion neutralization channel is used to release a neutralization medium to the corresponding negative ion neutralization channel to reduce the negative ion concentration; The first acquisition module is used to obtain the negative ion concentration released by the release medium of the current storage layer and the negative ion compensation concentration of the adjacent layer, and superimpose the two; In the control unit, for each time period, it is determined whether the superposition value exceeds the negative ion demand corresponding to the current storage layer; If exceeded, perform at least one of the following actions: Controlling the high-voltage package to reduce the output voltage to the release medium according to the degree of excess, or activating the negative ion neutralization channel and neutralizing the negative ions in the current storage layer according to the degree of excess; If it does not exceed, the second output voltage of the high-voltage package is increased to approach the demand threshold according to the difference between the superposition value and the maximum value of the negative ion demand, and the connection between the negative ion neutralization channel and the negative ion neutralization unit is cut off.

4. The refrigerator with negative ion purification function according to claim 2, characterized in that: In the calculation unit, the negative ion demand calculation of the high volatility layer includes: Obtain the detection results of the detection unit to detect whether there are multiple combinations of substances with volatile synergistic effects in the current storage layer; If the detection unit detects a combination of substances with a synergistic volatilization effect, it generates a multi-level release control instruction based on the degree of overlap of the volatilization phases of the substances: When the test result shows that the volatilization phases of the substances completely overlap, an exponential demand curve positively correlated with the superimposed volatilization rate is constructed; When the volatilization phases of substances are staggered, the volatilization intensity peaks of each substance are segmented and matched based on the time window sliding mechanism; If the volatilization rate of a single substance presents a discontinuous mutation, a disturbance response correction is performed: Identify the inflection point of the volatilization rate curve, expand it forward to establish a negative ion pre-release buffer zone, and adjust the compensation for negative ion demand according to the slope of the rate change after the inflection point.

5. The refrigerator with negative ion purification function according to claim 2, characterized in that: In the control unit, there are: Obtaining a first negative ion compensation amount diffused from the adjacent high volatility layer to the medium volatility layer, and performing a difference operation between the first negative ion compensation amount and the negative ion demand of the medium volatility layer; Control the high voltage transformer output according to the difference operation result: If the negative ion concentration of the release medium of the medium volatile layer and the first negative ion compensation amount interact to equal the negative ion demand, maintaining the first output voltage of the high voltage package to the release medium of the medium volatile layer; If the negative ion concentration of the release medium of the middle volatile layer and the first negative ion compensation amount is less than the negative ion requirement, the output voltage of the high-voltage package is increased in proportion to the difference until the upper threshold of the negative ion requirement is reached; If the negative ion concentration of the release medium of the mid-volatile layer exceeds the negative ion demand after interaction with the first negative ion compensation amount, the negative ion neutralization channel of the current layer is activated to reduce the concentration.

6. The refrigerator with negative ion purification function according to claim 2, characterized in that: In the control unit, there are: The spatial attenuation characteristics of the compensation amount of the high volatility layer during the transfer process to the low volatility layer are obtained. The invalid compensation components are eliminated based on the electric field interference between the layers to obtain the negative ion compensation amount of the high volatility layer to the low volatility layer. The amount of negative ions compensated by the medium volatility layer for the low volatility layer is calculated by the attenuation coefficient and the negative ion concentration of the medium volatility layer; The negative ion compensation amount of the medium volatility layer to the low volatility layer and the negative ion compensation amount of the high volatility layer to the low volatility layer are vectorially superimposed in the edge region of the low volatility layer to generate the negative ion compensation amount corresponding to the low volatility layer.

7. The refrigerator with negative ion purification function according to claim 2, characterized in that: The negative ion compensation of adjacent layers satisfies the relationship: Among them, k represents the sedimentation attenuation coefficient between adjacent layers, C0 represents the negative ion concentration in the upper layer, z represents the vertical height between adjacent storage layers, Q represents the negative ion release intensity in the lower layer, D represents the diffusion capacity of negative ions in the low-temperature environment inside the refrigerator, and A represents the cross-sectional area of effective diffusion inside the refrigerator.

8. The refrigerator with negative ion purification function according to claim 2, characterized in that: The invention also includes a prediction unit, wherein the prediction unit includes: Count the historical door opening time distribution and identify periodic high-frequency door opening periods; Extract the door opening interval and duration characteristics within the current time window. If it is predicted that the next time period will be a high-frequency door opening period, then: reduce the negative ion release concentration of all storage layers to the basic maintenance level, and cache the unreleased negative ion demand into the queue according to priority; If it is predicted that there will be no door opening operation in the next time period, then: the release concentration of the corresponding storage layer is increased according to the cumulative demand of the cache queue, and the cache demand that has been released is cleared.

9. A method for using a refrigerator with a negative ion purification function, characterized in that: The method of use is applied to the refrigerator according to any one of claims 1 to 8, and the method of use comprises the following steps: S1: The refrigeration layer and the freezer layer are divided into several storage layers based on the volatility of food; S2: Develop corresponding negative ion requirements based on the volatility of food in different storage layers in the refrigeration layer and the freezer layer; S3: For each storage layer, the first output voltage of the high-voltage package is controlled according to the first negative ion demand to make the release medium release negative ions. During the control process, the output voltage of the high-voltage package to the release medium of the storage layer is adjusted according to the negative ion compensation and negative ion demand of the adjacent layer to obtain the second output voltage.

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