Sterilization method and refrigerator

Abstract

The invention relates to the technical field of refrigeration equipment, and provides a sterilization method and a refrigerator, the illumination distance between the bottom surface of a food material and an illumination device in a storage chamber is adjusted according to the microbial contamination degree of the surface of the food material in the storage chamber; wherein the microbial pollution degree is in negative correlation with the illumination distance. The microbial contamination degree of the surfaces of the food materials is used as a condition for controlling the illumination distance, the phenomenon that the food materials with the high microbial contamination degree are not fully sterilized due to the fact that the distance between the food materials and the illumination device is long, and the food materials with the low microbial contamination degree are not fully sterilized due to the fact that the distance between the food materials and the illumination device is short can be avoided. Therefore, the sterilization effect of the light irradiated to the surfaces of the food materials by the illumination device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a sterilization method and a refrigerator. Background Art

[0002] Refrigerator, freezer and other refrigeration equipment used to store food usually have a chamber inside. If the chamber is closed for a long time, the environment inside the chamber will be relatively closed and humid, which can easily breed microorganisms and cause food odor to spread, causing food to spoil.

[0003] Related technology The sterilization equipment installed in the refrigeration equipment uses a pulse light device to sterilize the chamber, but different types of food in the chamber have different heights, and the distance between the surface of the food and the pulse light device varies. The food with a lower height is farther away from the pulse light device, resulting in insufficient sterilization; and the number of microorganisms on the surface of food of different types and freshness is different, and food with a large number of microorganisms is insufficiently sterilized. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a sterilization method, which can avoid the problem that food with a high degree of microbial contamination is not sufficiently sterilized when irradiated with light because it is far away from the irradiation device, and food with a low degree of microbial contamination is over-irradiated and damaged due to its close distance to the irradiation device, and high energy consumption when irradiated with light, thereby improving the sterilization effect of the light irradiated by the irradiation device on the surface of the food.

[0005] The invention also provides a refrigerator.

[0006] The invention also provides an electronic device.

[0007] The present invention also provides a non-transitory computer-readable storage medium.

[0008] The present invention also provides a computer program product.

[0009] The sterilization method according to the first embodiment of the present invention comprises:

[0010] According to the degree of microbial contamination on the surface of the food, adjusting the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room;

[0011] Among them, the degree of microbial contamination is negatively correlated with the illumination distance.

[0012] According to the sterilization method of the embodiment of the present invention, by obtaining the degree of microbial contamination on the surface of food in the storage room, and adjusting the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room according to the degree of microbial contamination on the surface of the food, the degree of microbial contamination on the surface of the food is used as a condition for controlling the lighting distance. This can avoid the problem of insufficient sterilization when food with a high degree of microbial contamination is irradiated with light for sterilization due to the long distance from the lighting device, and the problem of excessive irradiation and damage to food and high energy consumption when food with a low degree of microbial contamination is irradiated with light for sterilization due to the short distance from the lighting device, thereby improving the sterilization effect of the light irradiated by the lighting device to the surface of the food.

[0013] According to an embodiment of the present invention, adjusting the illumination distance between the bottom surface of the food and the indoor illumination device of the storage room according to the degree of microbial contamination on the surface of the food includes:

[0014] According to the degree of microbial contamination and the height of the food, adjusting the illumination distance between the bottom surface of the food and the illumination device;

[0015] Among them, the height of the food is positively correlated with the lighting distance.

[0016] According to an embodiment of the present invention, adjusting the illumination distance between the bottom surface of the food and the illumination device according to the microbial contamination degree and the height of the food includes:

[0017] Determining the height interval of the food height and the contamination level corresponding to the microbial contamination level;

[0018] Obtaining a distance interval according to the altitude interval and the pollution level;

[0019] The relative position relationship between the food and the illumination device is adjusted so that the distance between the bottom surface of the food and the illumination device is within the distance interval.

[0020] According to an embodiment of the present invention, obtaining the distance interval according to the height interval and the pollution level includes:

[0021] Based on the altitude interval and the pollution level, obtaining a distance interval in a set mapping relationship;

[0022] The set mapping relationship is a correspondence between the height interval set, the pollution level set and the distance interval set.

[0023] According to an embodiment of the present invention, the illumination device is a pulse xenon lamp, and obtaining the distance interval according to the height interval and the pollution level includes:

[0024] Based on the altitude range and the pollution level, obtaining a set pulse energy of the pulse xenon lamp;

[0025] The distance interval is obtained based on the quotient of the set pulse frequency of the pulse xenon lamp and the set pulse energy.

[0026] According to an embodiment of the present invention, when the illumination distance is determined, the illumination frequency of the illumination device is adjusted by acquiring real-time changes in the microbial contamination degree, wherein the microbial contamination degree is positively correlated with the illumination frequency.

[0027] According to one embodiment of the present invention, by controlling the lifting of the food, the illumination distance between the bottom surface of the food and the illumination device is adjusted.

[0028] and / or,

[0029] By controlling the lighting device, the lighting distance between the bottom surface of the food and the lighting device is adjusted.

[0030] A refrigerator according to an embodiment of the second aspect of the present invention comprises:

[0031] A box body, wherein a storage compartment is provided in the box body;

[0032] A lighting device, the lighting device is arranged on the top of the storage compartment;

[0033] An identification sensor, which is disposed inside the storage room and is used to obtain the degree of microbial contamination on the surface of food inside the storage room;

[0034] A lifting device, adapted to drive at least one of the food material and the illumination device to move;

[0035] A controller is connected to the identification sensor and the lifting device, and is used to control the lifting device according to the degree of microbial contamination on the surface of the food in the storage room to adjust the illumination distance between the bottom surface of the food and the illumination device.

[0036] According to one embodiment of the present invention, a drawer constituting the storage compartment is provided in the box body, and the lifting device is arranged inside the storage compartment and connected to the inner wall of the drawer; or, the lifting device is arranged outside the storage compartment and connected to the drawer.

[0037] The electronic device according to the third aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the sterilization method as described above when executing the program.

[0038] According to the non-transitory computer-readable storage medium of the fourth aspect of the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, the sterilization method as described above is implemented.

[0039] The computer program product according to the fifth aspect of the present invention comprises a computer program, which implements the sterilization method as described above when executed by a processor.

[0040] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0041] Due to the different types and freshness of food, the number of microbial communities on the surface of the food is also different. Different numbers of microbial communities will cause different degrees of microbial contamination on the surface of the food. Therefore, for different degrees of microbial contamination, if a good sterilization effect is to be achieved, the lighting device needs to provide different light intensities to the food. At the same time, when the lighting frequency of the lighting device is constant, the lighting intensity of the lighting device is affected by the distance from the food to the lighting device, that is, different distances will have different effects on the sterilization effect of the light irradiated by the lighting device. Therefore, by changing the lighting distance between the bottom surface of the food and the indoor lighting device in the storage room, the light intensity that meets the sterilization effect of the microbial contamination degree on the surface of the food can be achieved accordingly.

[0042] The sterilization method of the embodiment of the present invention obtains the degree of microbial contamination on the surface of food in the storage room, and adjusts the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room according to the degree of microbial contamination on the surface of the food. The degree of microbial contamination on the surface of the food is used as a condition for controlling the lighting distance. This can avoid the problem that food with a high degree of microbial contamination is not sufficiently sterilized when irradiated with light for sterilization due to its long distance from the lighting device, and food with a low degree of microbial contamination is not damaged by excessive irradiation and high energy consumption when irradiated with light for sterilization due to its short distance from the lighting device, thereby improving the sterilization effect of the light irradiated by the lighting device to the surface of the food.

[0043] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1It is a schematic diagram of the process of the sterilization method provided by an embodiment of the present invention;

[0046] Figure 2 It is a setting mapping relationship table of height intervals, pollution levels and distance intervals of the sterilization method provided in an embodiment of the present invention;

[0047] Figure 3 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 4 is a structural schematic diagram of a lighting device for a refrigerator provided by an embodiment of the present invention;

[0049] Figure 5 It is a schematic diagram of an electronic device flow chart provided by an embodiment of the present invention.

[0050] Reference numerals:

[0051] 300, box; 310, storage compartment; 320, drawer;

[0052] 400, lighting device; 410, housing; 411, air inlet; 412, cavity; 413, air outlet; 420, photocatalyst purification unit; 430, lamp body;

[0053] 500, height detector;

[0054] 600, identification sensor;

[0055] 700, lifting device;

[0056] 810, processor; 820, communication interface; 830, memory; 840, communication bus. DETAILED DESCRIPTION

[0057] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0060] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] like Figure 1 As shown, an embodiment of the present invention provides a sterilization method, comprising:

[0063] Step 100, adjusting the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room according to the degree of microbial contamination on the surface of the food;

[0064] Among them, the degree of microbial contamination is negatively correlated with the illumination distance.

[0065] Due to the different types and freshness of food, the number of microbial communities on the surface of the food is also different. Different numbers of microbial communities will cause different degrees of microbial contamination on the surface of the food. Therefore, for different degrees of microbial contamination, if a good sterilization effect is to be achieved, the lighting device needs to provide different light intensities to the food. At the same time, when the lighting frequency of the lighting device is constant, the lighting intensity of the lighting device is affected by the distance from the food to the lighting device, that is, different distances will have different effects on the sterilization effect of the light irradiated by the lighting device. Therefore, by changing the lighting distance between the bottom surface of the food and the indoor lighting device in the storage room, the light intensity that meets the sterilization effect of the microbial contamination degree on the surface of the food can be achieved accordingly.

[0066] The sterilization method of the embodiment of the present invention obtains the degree of microbial contamination on the surface of food in the storage room, and adjusts the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room according to the degree of microbial contamination on the surface of the food. The degree of microbial contamination on the surface of the food is used as a condition for controlling the lighting distance. This can avoid the problem that food with a high degree of microbial contamination is not sufficiently sterilized when irradiated with light for sterilization due to its long distance from the lighting device, and food with a low degree of microbial contamination is not damaged by excessive irradiation and high energy consumption when irradiated with light for sterilization due to its short distance from the lighting device, thereby improving the sterilization effect of the light irradiated by the lighting device to the surface of the food.

[0067] In this embodiment, the degree of microbial contamination is negatively correlated with the illumination distance, that is, the higher the degree of microbial contamination on the surface of the food, the smaller the illumination distance between the bottom surface of the food and the illumination device needs to be.

[0068] According to one embodiment of the present invention, adjusting the illumination distance between the bottom surface of the food and the indoor illumination device of the storage room according to the degree of microbial contamination on the surface of the food includes:

[0069] Adjust the lighting distance between the bottom surface of the food and the lighting device according to the degree of microbial contamination and the height of the food;

[0070] Among them, the height of the food is positively correlated with the lighting distance.

[0071] Since different types of food will form different food heights when placed in the storage room, the distance between the surface of different food and the lighting device will be different. The sterilization method of the embodiment of the present invention obtains the food height of the food in the storage room and the degree of microbial contamination on the surface of the food, and adjusts the distance between the food and the lighting device in the storage room according to the food height and the degree of microbial contamination on the surface of the food. The height of the food and the degree of microbial contamination on the surface of the food are comprehensively used as conditions for controlling the lighting distance. This can avoid the problem of insufficient sterilization when the food with a lower height is far from the lighting device for sterilization, and the problem of excessive exposure to damage the food and high energy consumption when the food with a higher height is close to the lighting device for sterilization, thereby improving the sterilization effect of the light irradiated by the lighting device to the surface of the food.

[0072] In this embodiment, the height of the food and the degree of microbial contamination on the surface of the food are taken as the conditions for controlling the lighting distance, so that the light intensity can be adjusted more scientifically and reasonably. For food of different types and surface freshness, there can be a more comprehensive and sufficient basis for judging and controlling the light intensity. While ensuring the best sterilization effect on the food, it can also effectively save energy and reduce consumption while maintaining the quality of the food.

[0073] In this embodiment, the height of the food is positively correlated with the illumination distance, that is, the greater the height of the food, the greater the illumination distance between the bottom surface of the food and the illumination device needs to be controlled.

[0074] According to one embodiment of the present invention, adjusting the illumination distance between the bottom surface of the food and the illumination device according to the degree of microbial contamination and the height of the food includes:

[0075] Determine the height range of the food material and the contamination level corresponding to the degree of microbial contamination;

[0076] According to the height interval and pollution level, the distance interval is obtained;

[0077] The relative position relationship between the food and the illumination device is adjusted so that the illumination distance between the bottom surface of the food and the illumination device is within the distance interval.

[0078] In this embodiment, combined with Figure 2 As shown, the height interval includes a first height range, i.e., 0 to 5 cm, a second height range, i.e., 5 to 10 cm, and a third height range, i.e., 10 to 15 cm, and the height interval to which the current food belongs is obtained according to the height of the food.

[0079] In other embodiments, the number of height intervals is not limited, and the span of each height range is also not limited. It can be divided according to specific sterilization distance requirements to ensure that the food height has a corresponding height interval.

[0080] It is understood that the number of viable bacteria in daily food is generally considered to be 10 4 ~10 7 CFU / g, when the number of viable bacteria reaches 10 8 CFU / g can be considered to be in the initial stage of corruption. In addition, referring to the food safety standards, the total number of colonies in preserved fruits and candied fruits should not exceed 10 4 CFU / g; the total number of colonies in fresh-cut fruits and vegetables should not exceed 10 5 CFU / g.

[0081] Therefore, in this embodiment, the total number of microbial communities is used as the pollution level assessment standard, and the specific parameters are as follows:

[0082] The total colony count is greater than or equal to 4.5lgCFU / g, which is the first level of contamination;

[0083] The total colony count is less than 4.5lgCFU / g, which is the second level of contamination.

[0084] In other embodiments, since different food ingredients have different abilities to resist corruption, the contamination level may also be changed according to actual needs.

[0085] In this embodiment, the distance interval is determined by the height interval and the pollution level. When the distance between the food and the lighting device is within the distance interval, the optimal pulse energy can be matched, thereby ensuring sufficient killing of microorganisms on the surface of the food.

[0086] According to an embodiment of the present invention, obtaining the distance interval according to the altitude interval and the pollution level includes:

[0087] Based on the height interval and the pollution level, the distance interval is obtained in the set mapping relationship;

[0088] The mapping relationship is set as the correspondence between the height interval set, the pollution level set and the distance interval set.

[0089] In this embodiment, the corresponding height interval is found in the height interval set based on the height of the food, the corresponding pollution level is found in the pollution level set based on the degree of microbial contamination on the surface of the food, and the corresponding distance interval is found in the distance interval set based on the height interval and the pollution level.

[0090] In one embodiment, the height interval includes a first height range, i.e., 0-5 cm, a second height range, i.e., 5-10 cm, and a third height range, i.e., 10-15 cm, and the pollution level includes a first level and a second level. Of course, each height interval and the mapping relationship between the height interval, the pollution level, and the distance interval can also be adjusted accordingly.

[0091] Combination Figure 2As shown, when the food height belongs to the first height range and the degree of microbial contamination is the first level, the distance interval is 10 cm; when the food height belongs to the first height range and the degree of microbial contamination is the second level, the distance interval is 10-15 cm; when the food height belongs to the second height range and the degree of microbial contamination is the first level, the distance interval is 10-15 cm; when the food height belongs to the second height range and the degree of microbial contamination is the second level, the distance interval is 10-20 cm; when the food height belongs to the third height range and the degree of microbial contamination is the first level, the distance interval is 15-20 cm; when the food height belongs to the third height range and the degree of microbial contamination is the second level, the distance interval is 20 cm.

[0092] According to one embodiment of the present invention, the illumination device is a pulse xenon lamp, and obtaining the distance interval according to the height interval and the pollution level includes:

[0093] Based on the altitude range and pollution level, the set pulse energy of the pulsed xenon lamp is obtained;

[0094] The distance interval is obtained based on the quotient of the set pulse frequency and the set pulse energy of the pulse xenon lamp.

[0095] The pulse energy is set to meet the requirements for sterilizing the surface of food.

[0096] In this embodiment, the illumination device uses a pulse xenon lamp, according to the pulse energy empirical formula:

[0097] W=K(EE 损 )*f*t / (mL)

[0098] Where K is the energy constant under a specific design; E is the single pulse input energy, in joules; f is the frequency; E 损 is the single pulse energy loss, in joules; t is the pulse time, in seconds; L is the distance, in centimeters; and m is the distance loss coefficient.

[0099] It can be understood that the pulse energy received by the surface of the food is related to the pulse time, frequency and distance. The pulse energy acts on the surface of the food to achieve a sterilization effect. That is, under the pulse light of the same frequency, the sterilization effect of the lighting device is related to the distance between the surface of the food and the lighting device. By obtaining the set pulse energy and then adjusting the distance between the surface of the food and the lighting device, not only the energy-saving effect of the lighting device is guaranteed, but also the sufficient killing of microorganisms on the surface of the food is achieved.

[0100] In other embodiments, the illumination device may also be an ultraviolet lamp. Different illumination lamps are used to adapt to different illumination energy calculation conditions and control results.

[0101] It can be understood that according to the empirical formula of pulse energy, the distance between the surface of the food and the illumination device required for the optimal pulse energy matched under different pulse frequencies is different. In other embodiments, the preset pulse frequency can be set according to usage requirements. Therefore, after changing the preset pulse frequency, the setting mapping relationship of the height range, pollution level and distance range changes accordingly. By setting different pulse frequencies, the sterilization method of the present application is conducive to adapting to usage environments of different space sizes.

[0102] According to an embodiment of the present invention, when the illumination distance is determined, the illumination frequency of the illumination device is adjusted by acquiring real-time changes in the degree of microbial contamination, wherein the degree of microbial contamination is positively correlated with the illumination frequency.

[0103] In this embodiment, after adjusting the illumination distance between the bottom surface of the food and the indoor illumination device in the storage room according to the degree of microbial contamination on the surface of the food, the illumination distance can be fixed, and when the illumination device irradiates with a corresponding light intensity, the degree of microbial contamination on the surface of the food is detected in real time. According to the change in the degree of microbial contamination, the illumination frequency of the illumination device at the current illumination distance is adjusted, and then the illumination intensity of the illumination device is adjusted according to the change in the real-time degree of microbial contamination. For example, the illumination frequency of the illumination device can be adjusted in a step-by-step manner to adapt to the gradually decreasing degree of microbial contamination.

[0104] In this embodiment, after the illumination distance is fixed, the illumination frequency is adjusted by obtaining changes in the degree of microbial contamination. There is no need to move the food or the illumination device. Only the frequency change of the illumination device itself is controlled. The control process is more flexible and adaptable. At the same time, real-time detection of different degrees of microbial contamination during the sterilization process of the same food is possible, which is more conducive to ensuring the best sterilization effect of the food while effectively saving energy and reducing consumption, and maintaining the quality of the food.

[0105] In this embodiment, the lighting device is arranged above the food. At this time, the vertical distance between the supporting surface contacted by the bottom of the food and the luminous surface of the lighting device is the farthest distance at which the light of the lighting device is irradiated on the surface of the food. According to the empirical formula of pulse energy, the surface sterilization effect of the food is weakest at the farthest distance at this time. By setting the distance between the food and the lighting device to the vertical distance between the supporting surface contacted by the bottom of the food and the luminous bottom surface of the lighting device, the sterilization of the surface of the food is sufficient at the weakest point, thereby ensuring that the surface of the food as a whole is sufficiently sterilized.

[0106] In other embodiments, the lighting device may also be in the form of multiple light-emitting surfaces arranged around the food. In this case, the distance between the food and the lighting device is the straight-line distance between the farthest point of the food from the light-emitting surface of the lighting device and the light-emitting surface of the lighting device.

[0107] According to one embodiment of the present invention, the lighting distance between the bottom surface of the food and the lighting device is adjusted by controlling the lifting of the food, and / or the lighting distance between the bottom surface of the food and the lighting device is adjusted by controlling the lighting device.

[0108] In this embodiment, it is determined that the illumination distance between the bottom surface of the food and the illumination device is greater than the distance interval, and the food is controlled to rise until the illumination distance between the bottom surface of the food and the illumination device is equal to the distance interval; or, it is determined that the illumination distance between the bottom surface of the food and the illumination device is less than the distance interval, and the food is controlled to descend until the illumination distance between the bottom surface of the food and the illumination device is equal to the distance interval.

[0109] In this embodiment, combined with Figure 2 As shown, taking the food height of 3 cm and the microbial contamination level on the food surface of the first level as an example, the height interval of the food height is the first height range (0-5 cm), and the contamination level of the microbial contamination level on the food surface is the first level. According to the mapping relationship among the height interval, the contamination level and the distance interval, the distance interval is 10 cm. When the distance between the food and the lighting device is greater than 10 cm, the food is controlled to rise until the distance between the food and the lighting device is equal to the distance interval; when the distance between the food and the lighting device is less than 10 cm, the food is controlled to descend until the distance between the food and the lighting device is equal to the distance interval.

[0110] In other embodiments, the movement of the lighting device can also be controlled to adjust the lighting distance between the bottom surface of the food and the lighting device. For example, if it is determined that the lighting distance between the bottom surface of the food and the lighting device is greater than the distance interval, the lighting device is controlled to descend until the lighting distance between the bottom surface of the food and the lighting device is equal to the distance interval; or, if it is determined that the lighting distance between the bottom surface of the food and the lighting device is less than the distance interval, the lighting device is controlled to rise until the lighting distance between the bottom surface of the food and the lighting device is equal to the distance interval.

[0111] The embodiment of the present invention provides a refrigerator, including a box body 300, an illumination device 400, a height detector 500, an identification sensor 600, a lifting device 700 and a controller. A storage compartment 310 is provided in the box body 300; the illumination device 400 is arranged at the top of the storage compartment 310; the height detector 500 is arranged in the storage compartment 310, and is used to detect the height of the food in the storage compartment 310; the identification sensor 600 is arranged in the storage compartment 310, and is used to obtain the microbial contamination degree of the surface of the food in the storage compartment 310; the lifting device 700 is suitable for driving at least one of the food and the illumination device 400 to move; the controller is connected to the height detector 500, the identification sensor 600 and the lifting device 700, and is used to control the lifting device 700 according to the food height of the food in the storage compartment 310 and the microbial contamination degree of the food surface, so as to adjust the illumination distance between the bottom surface of the food and the illumination device 400.

[0112] In the refrigerator of the embodiment of the present invention, a storage compartment 310 for placing food is provided in the box body 300; a lighting device 400 is arranged on the top of the storage compartment 310 to illuminate the food in the storage compartment 310, and the light of the lighting device 400 has a bactericidal effect and is suitable for killing microorganisms on the surface of the food; a height detector 500 is arranged in the storage compartment 310 to detect the height of the food and transmit the detection data to the controller; an identification sensor 600 is arranged in the storage compartment 310 to obtain the degree of microbial contamination on the surface of the food; The lowering device 700 is arranged at the bottom of the storage compartment 310, and is used to carry food or be connected to the illumination device 400; the controller is connected to the height detector 500, the identification sensor 600 and the lifting device 700, and is used to match the height range, pollution level and illumination distance mapping relationship in the controller according to the height of the food and the degree of microbial contamination on the surface of the food, and then adjust the distance between the food and the illumination device 400, so as to ensure that the surface of the food in the storage compartment 310 matches the optimal pulse energy, so that the microorganisms on the surface of the food are fully killed.

[0113] It is understandable that by real-time detection of the degree of microbial contamination on the surface of food materials, the present application can also reduce the pulse frequency after the number of microorganisms on the surface of the food materials is killed, thereby reducing the operating costs of the refrigerator.

[0114] In this embodiment, combined with Figure 3 As shown, the lighting device 400 is arranged at the top of the storage compartment 310 to sterilize the surface of the food in the storage compartment 310 below by lighting. The height detector 500 and the identification sensor 600 are integrated on the left wall of the storage compartment 310, and the lifting device 700 is arranged at the bottom of the storage compartment 310.

[0115] In other embodiments, the lifting device 700 is connected to the lighting device 400. At this time, the distance between the food and the lighting device 400 is adjusted by moving the lighting device through the lifting device 700. Since the lighting device 400 is small in size and requires less energy to move, it is beneficial to reduce the operating cost of the refrigerator.

[0116] In this embodiment, the illumination device 400 uses a pulse xenon lamp. The pulse light emitted by the pulse xenon lamp has a full-band spectrum (200 to 1100 nanometers), including an ultraviolet band, which can be used for light sterilization. Energy is stored in an energy storage capacitor and released instantly, which can reduce the operating cost of the refrigerator and reduce the heat generation of the illumination device 400.

[0117] In other embodiments, the illumination device 400 may also use an ultraviolet lamp. The ultraviolet lamp has the advantages of small size and low power consumption, but it has the problems of low power and easy heat generation.

[0118] In this embodiment, the height detector 500 uses an infrared laser ranging sensor. In other embodiments, it can also be detected by radar, sound waves, image acquisition, etc.

[0119] In this embodiment, the identification sensor 600 realizes the identification of microbial communities based on hyperspectral imaging technology. When the light source of the identification sensor 600 is irradiated onto the surface of the food, due to the different compositions and functional groups of different substances, different microorganisms have different absorbances, dispersions and reflectivities to specific wavelengths. The similarity of the spectral images of the two samples indicates that their chemical composition and physical properties are similar. Therefore, by analyzing the differences between the spectral signals, the microbial communities on the surface of the food can be qualitatively and quantitatively analyzed.

[0120] According to one embodiment of the present invention, a drawer 320 constituting a storage compartment 310 is provided in the box body 300, and the lifting device 700 is arranged inside the storage compartment 310 and connected to the inner wall of the drawer 320; or, the lifting device 700 is arranged outside the storage compartment 310, and the lifting device 700 is connected to the drawer 320.

[0121] In this embodiment, combined with Figure 3 As shown, a drawer 320 is provided in the box body 300, and the drawer 320 encloses a storage compartment 310. The lifting device 700 is arranged on the inner bottom wall of the drawer 320. At this time, the top of the lifting device 700 contacts the bottom of the food, and the bottom of the lifting device 700 is connected to the inner bottom wall of the drawer 320. The lifting device 700 is completely arranged in the storage compartment 310 of the drawer 320. During the operation of the lifting device 700, the drawer 320 does not change in position or shape, which is beneficial to the cold air separation of the lifting device 700 and other storage spaces of the box body 300, thereby reducing the damage rate of the lifting device 700.

[0122] In this embodiment, the lifting device 700 adopts a scissor-type lifting mechanism, which is folded in a descending state and unfolded in an ascending state, thereby allowing the food placed on the top of the lifting device 700 to rise and fall.

[0123] In other embodiments, the lifting device 700 is disposed on the box body 300 and connected to the drawer 320. For example, the lifting device 700 is disposed below the drawer 320. At this time, the top of the lifting device 700 is connected to the outer bottom wall of the drawer 320, and the bottom of the lifting device 700 is connected to the box body 300. The lifting device 700 is disposed outside the drawer 320, which is conducive to placing liquid food, and the liquid will not affect the operation of the lifting device 700. The lifting device 700 can also be disposed around the drawer 320, using a chain to drive the drawer 320 to move up and down along a preset track, or be disposed on the top, and a motor drives the rope collection disk to tighten or loosen the rope passing through the bottom of the drawer 320, so as to realize the up and down movement of the drawer 320.

[0124] According to one embodiment of the present invention, the illumination device 400 includes a shell 410, a photocatalyst purification unit 420 and a lamp body 430, the shell 410 is constructed with an air inlet 411, a cavity 412 and an air outlet 413 that are interconnected; the photocatalyst purification unit 420 is located in the cavity 412; the lamp body 430 is connected to the shell 410, the first light-emitting side of the lamp body 430 faces the outside of the shell 410, and the second light-emitting side of the lamp body 430 faces the photocatalyst purification unit 420, and the light-emitting band of the lamp body 430 includes the ultraviolet band.

[0125] In this embodiment, combined with Figure 4 As shown, the lamp body 430 is connected to the shell 410, and the first light-emitting side of the lamp body 430 faces the outside of the shell 410. The lamp body 430 irradiates the food outside the shell 410 with light including the ultraviolet band, thereby achieving a sterilization effect on the irradiated surface of the food; the shell 410 is configured with an air inlet 411, a cavity 412 and an air outlet 413 that are interconnected, and the gas outside the shell 410 enters the cavity 412 from the air inlet 411, and the cavity 412 is provided with a photocatalyst purification unit 420. The second light-emitting side of the lamp body 430 faces the photocatalyst Purification unit 420: The photocatalyst purification unit 420 generates a catalytic degradation function under the action of the light emitted by the lamp body 430: it can effectively degrade odorous gases in the gas and kill various bacteria. The bacteria carried in the gas entering the cavity 412 are killed under the action of the photocatalyst purification unit 420. The clean gas after killing the bacteria continues to flow in the cavity 412 along the air inlet 411 toward the air outlet 413, and is discharged through the air outlet 413. The clean gas flows out of the shell 410, which makes up for the problem of poor sterilization effect when there are blind spots on the food.

[0126] When the illumination device 400 is installed in the storage compartment 310 of the housing 300, the storage compartment 310 is connected to the cavity 412 in the shell 410 to form a circulating air path, and the clean gas flowing out of the shell 410 enters the storage compartment 310, and the gas in the storage compartment 310 continues to enter the cavity 412 through the air inlet 411, so as to realize the circulation and cleaning of the gas. Through the flow of the gas, the bacteria are carried to the surface of the photocatalyst purification unit 420, and the catalytic degradation function of the photocatalyst purification unit 420 under the illumination condition is used to realize the deodorization and sterilization effects. At the same time, the photocatalyst purification unit 420 is arranged on the second light-emitting side of the lamp body 430. Under the premise of not blocking the light emitted from the first light-emitting side of the lamp body 430 from sterilizing the food, the utilization rate of the light on the second light-emitting side of the lamp body 430 is also improved, that is, the overall sterilization effect of the illumination device 400 is improved while reducing the use cost.

[0127] Figure 5 An example of a physical structure diagram of an electronic device is shown, and the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the following method: according to the height of the food in the storage room and the degree of microbial contamination on the surface of the food, adjust the distance between the food and the indoor lighting device of the storage room.

[0128] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0129] On the other hand, an embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the methods provided by the above-mentioned method embodiments, for example, including: adjusting the distance between the food and the indoor lighting device of the storage room according to the height of the food in the storage room and the degree of microbial contamination on the surface of the food.

[0130] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by the processor 810, it is implemented to execute the transmission methods provided in the above-mentioned embodiments, for example including: adjusting the distance between the food and the indoor lighting device of the storage room according to the height of the food in the storage room and the degree of microbial contamination on the surface of the food.

[0131] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0132] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution can be essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A sterilization method, characterized in that: include: According to the degree of microbial contamination on the surface of the food, adjusting the lighting distance between the bottom surface of the food and the indoor lighting device of the storage room; Among them, the degree of microbial contamination is negatively correlated with the illumination distance.

2. The sterilization method according to claim 1, characterized in that: The step of adjusting the illumination distance between the bottom surface of the food and the indoor illumination device of the storage room according to the degree of microbial contamination on the surface of the food comprises: According to the degree of microbial contamination and the height of the food, adjusting the illumination distance between the bottom surface of the food and the illumination device; Among them, the height of the food is positively correlated with the lighting distance.

3. The sterilization method according to claim 2, characterized in that: The step of adjusting the illumination distance between the bottom surface of the food and the illumination device according to the microbial contamination degree and the height of the food includes: Determining the height interval of the food height and the contamination level corresponding to the microbial contamination level; Obtaining a distance interval according to the altitude interval and the pollution level; The relative position relationship between the food and the illumination device is adjusted so that the illumination distance between the bottom surface of the food and the illumination device is within the distance interval.

4. The sterilization method according to claim 3, characterized in that: The obtaining of the distance interval according to the height interval and the pollution level comprises: Based on the altitude interval and the pollution level, obtaining a distance interval in a set mapping relationship; The set mapping relationship is a correspondence between the height interval set, the pollution level set and the distance interval set.

5. The sterilization method according to claim 3, characterized in that: The illumination device is a pulse xenon lamp, and obtaining the distance interval according to the height interval and the pollution level includes: Based on the altitude range and the pollution level, obtaining a set pulse energy of the pulse xenon lamp; The distance interval is obtained based on the quotient of the set pulse frequency of the pulse xenon lamp and the set pulse energy.

6. The sterilization method according to any one of claims 1 to 5, characterized in that: When the illumination distance is determined, the illumination frequency of the illumination device is adjusted by acquiring the real-time change of the microbial contamination degree, wherein the microbial contamination degree is positively correlated with the illumination frequency.

7. The sterilization method according to any one of claims 1 to 5, characterized in that: By controlling the lifting of the food, the illumination distance between the bottom surface of the food and the illumination device is adjusted. and / or, By controlling the lighting device, the lighting distance between the bottom surface of the food and the lighting device is adjusted.

8. A refrigerator, characterized in that: include: A box body, wherein a storage compartment is provided in the box body; A lighting device, the lighting device is arranged on the top of the storage compartment; An identification sensor, which is disposed inside the storage room and is used to obtain the degree of microbial contamination on the surface of food inside the storage room; A lifting device, adapted to drive at least one of the food material and the illumination device to move; A controller is connected to the identification sensor and the lifting device, and is used to control the lifting device according to the degree of microbial contamination on the surface of the food in the storage room to adjust the illumination distance between the bottom surface of the food and the illumination device.

9. The refrigerator according to claim 8, characterized in that: A drawer constituting the storage compartment is provided in the box body, and the lifting device is arranged inside the storage compartment and connected to the inner wall of the drawer; or, the lifting device is arranged outside the storage compartment and connected to the drawer.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the sterilization method according to any one of claims 1 to 7 is implemented.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the sterilization method according to any one of claims 1 to 7 is implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the sterilization method according to any one of claims 1 to 7 is implemented.

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