Household refrigerator and sterilization and purification control method thereof

Abstract

According to the household refrigerator and the sterilization and purification control method thereof, when the refrigerator chamber door is in the open state, the continuous opening time of the refrigerator chamber door is obtained, and when the continuous opening time is longer than the first opening duration, it is judged that primary convection exchange occurs between outside air and indoor air; starting a sterilization and purification device arranged in the compartment, controlling the sterilization and purification device to enter a first sterilization and purification mode, obtaining the real-time compartment door state after the sterilization and purification device enters the first sterilization and purification mode, and when the refrigerator compartment door is in the open state and the continuous opening time is longer than the second opening time, starting the sterilization and purification device. And the sterilization and purification device is controlled to enter a second sterilization and purification mode when it is judged that sufficient convection exchange occurs between the outside air and the indoor air. According to the refrigerator, bacteria and peculiar smells in air in the ice compartment can be effectively removed, and pollution of outside air to the interior of the refrigerator in the normal door opening use process can be effectively removed.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerators, in particular to a household refrigerator and a control method for sterilizing and purifying the same. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, people's pace of life is getting faster and faster, so they are more and more willing to buy a lot of food and put it in the refrigerator. The refrigerator has become one of the indispensable household appliances in people's daily life.

[0003] However, since various foods are stored in refrigerators for a long time, bacteria are easy to breed inside. At the same time, due to the reproduction of bacteria and other microorganisms and the long-term placement of various foods in a closed space, odors will be generated. In addition, a large number of large particles of pollution such as dust are suspended in the air inside and outside the refrigerator, which will provide a relatively safe hiding place for bacteria, viruses and other microorganisms, and will also absorb odor particles, reducing the purification function of the refrigerator. It should be noted that in daily use, the indoor air of the refrigerator will inevitably exchange with the air in the external environment, which is easy to cause secondary pollution of the air in the refrigerator.

[0004] In the prior art, most refrigerators are equipped with sterilization components, which sterilize the air in the refrigerator to solve the problem of bacterial growth and odor in the refrigerator. However, the current active sterilization and purification technology for refrigerators usually adopts a single sterilization and purification technology. For example, the refrigerator is only equipped with one of ion sterilization, ultraviolet sterilization, ozone sterilization, and photocatalytic sterilization. The sterilization and purification effect is limited, and there is a large room for optimization.

[0005] Moreover, the sterilization components of most refrigerators currently perform disinfection and sterilization in a regular periodic cycle after the refrigerator door is closed. First, there is a lack of disposal measures after the refrigerator door is opened, resulting in secondary pollution of the indoor air by external air. Second, it inevitably causes problems such as incomplete sterilization, uneven sterilization, excessive sterilization, etc.

[0006] In view of this, it is necessary to propose a household refrigerator and a control method for sterilization and purification thereof to solve or at least alleviate the above-mentioned defects. Summary of the invention

[0007] The main purpose of the present invention is to provide a household refrigerator and a control method for sterilization and purification thereof, so as to solve the technical problems that the sterilization method in the prior art lacks disposal means after the refrigerator door is opened, resulting in secondary pollution of the indoor air by the external air and limited sterilization and purification effect.

[0008] To achieve the above object, the present invention provides a control method for sterilizing and purifying a household refrigerator, comprising the following steps:

[0009] S11, when the refrigerator compartment door is in an open state, obtaining the continuous opening time of the refrigerator compartment door, and determining whether the continuous opening time is greater than a first opening time length;

[0010] S12, when the continuous opening time is greater than the first opening time, it is determined that the outside air and the air in the room have undergone preliminary convection exchange, the sterilization and purification device arranged in the room is started, and the sterilization and purification device is controlled to enter the first sterilization and purification mode; wherein the sterilization and purification device includes a circulating fan, an ultraviolet sterilization module and a negative ion sterilization module, the rotating speed of the circulating fan has any one of a low speed gear state, a medium speed gear state and a high speed gear state, the ultraviolet sterilization module has any one of an open state and a closed state, and the negative ion sterilization module has any one of an open state and a closed state; the first sterilization and purification mode is that the rotating speed of the circulating fan is in a low speed gear state, the ultraviolet sterilization module is in an open state, and the negative ion sterilization module is in a closed state;

[0011] S13, obtaining a real-time door state of the sterilization and purification device after entering the first sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time door state;

[0012] S14, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a second opening time length; wherein the second opening time length is greater than the first opening time length;

[0013] S151, when the continuous opening time is greater than the second opening time, it is determined that sufficient convection exchange occurs between the outside air and the indoor air, and the sterilization and purification device is controlled to enter the second sterilization and purification mode; wherein the second sterilization and purification mode is that the circulating fan speed is in the medium speed gear state, the ultraviolet sterilization module is in the open state, and the negative ion sterilization module is in the closed state;

[0014] S152: When the continuous opening time is less than or equal to the second opening time, the sterilization and purification device is maintained to continue operating in the first sterilization and purification mode.

[0015] Preferably, the step S151 further includes the following steps:

[0016] S1511, obtaining the real-time door state of the sterilization and purification device after entering the second sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time door state;

[0017] S1512, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a third opening time length; wherein the third opening time length is greater than the second opening time length;

[0018] S1513, when the continuous opening time is greater than the third opening time length, it is determined that the refrigerator is in an abnormal state, and the sterilization and purification device is controlled to be in a closed state;

[0019] S1514: When the continuous opening time is less than or equal to the third opening time, the sterilization and purification device is maintained to continue operating in the second sterilization and purification mode.

[0020] Preferably, the step S13 further includes the following steps:

[0021] S131, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device to continue operating in the first sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device after the refrigerator compartment door is closed;

[0022] S132, determine whether the continuous working time is greater than the set working time; if so, execute steps S133 to S134, if not, execute step S135;

[0023] S133, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0024] S134, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state;

[0025] S135: When the continuous working time is less than or equal to the set working time, the sterilization and purification device is maintained to continue operating in the first sterilization and purification mode.

[0026] Preferably, the step S133 further includes the following steps:

[0027] S1331, when the concentration of the air pollutants is greater than or equal to the preset concentration value, controlling the sterilization and purification device to enter a third sterilization and purification mode; wherein the third sterilization and purification mode is that the speed of the circulating fan is at a high gear, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an off state;

[0028] S1332, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0029] S1333, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state;

[0030] S1334: When the air pollutant concentration is greater than or equal to a preset concentration value, maintaining the sterilization and purification device to continue operating in the third sterilization and purification mode.

[0031] Preferably, the step S1511 further includes the following steps:

[0032] S15111, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device to continue operating in the second sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device after the refrigerator compartment door is closed;

[0033] S15112, determine whether the continuous working time is greater than the set working time; if so, execute steps S15113 to S15115, if not, execute step S15116;

[0034] S15113, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0035] S15114, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state;

[0036] S15115, when the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331;

[0037] S15116: When the continuous working time is less than or equal to the set working time, the sterilization and purification device is maintained to continue operating in the second sterilization and purification mode.

[0038] Preferably, the method further comprises the steps of:

[0039] S21, when the refrigerator compartment door is in a closed state, obtaining the actual temperature in the compartment and the startup temperature of the compartment, and determining the temperature difference between the actual temperature and the startup temperature;

[0040] S22, when the temperature difference is less than or equal to the first temperature value, detecting whether the sterilization and purification device is in a working state;

[0041] S23, when the sterilization and purification device is in working state, obtaining the continuous operation time of the sterilization and purification device, and determining whether the continuous operation time is less than the first operation time, if so, executing step S241, if not, executing steps S242 to S243;

[0042] S241, controlling the sterilization and purification device to enter the fifth sterilization and purification mode; wherein the fifth sterilization and purification mode is that the circulating fan speed is in the medium speed state, the ultraviolet sterilization module is in the on state, and the negative ion sterilization module is in the on state;

[0043] S242, determining whether the continuous operation duration is less than a second operation duration; wherein the second operation duration is greater than the first operation duration;

[0044] S243, when the continuous operation time is less than the second operation time, controlling the sterilization and purification device to enter the fourth sterilization and purification mode; wherein, the fourth sterilization and purification mode is that the circulating fan speed is in a low speed state, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an on state.

[0045] Preferably, the step S22 further includes the following steps:

[0046] S221, when the sterilization and purification device is not in working state, obtaining the stop working time of the sterilization and purification device, and judging whether the stop working time is greater than the first stop time; if so, executing step S222, if not, executing steps S223 to S225;

[0047] S222, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a fifth sterilization and purification mode;

[0048] S223, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0049] S224, when the concentration of air pollutants is less than a preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state;

[0050] S225: When the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331.

[0051] Preferably, the step S222 further includes the following steps:

[0052] S2221, obtaining the continuous operation time of the sterilization and purification device, and determining whether the continuous operation time is greater than the first operation time;

[0053] S2222, when the continuous operation time is greater than the first operation time, controlling the sterilization and purification device to enter a fourth sterilization and purification mode;

[0054] S2223, continue to determine whether the continuous running time is greater than the second running time;

[0055] S2224, when the continuous operation time is greater than the second operation time, the concentration of air pollutants in the room is obtained, and it is determined whether the concentration of air pollutants is less than a preset concentration value. If so, the sterilization and purification device is controlled to be in a closed state; if not, enter step S1331.

[0056] Preferably, the step S21 further includes the following steps:

[0057] S211, when the temperature difference value is greater than the first temperature value and less than or equal to the second temperature value, obtaining a first holding time of the temperature difference value in the temperature range, and determining whether the first holding time reaches a preset threshold;

[0058] S212, when the first holding time reaches a preset threshold, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a fifth sterilization and purification mode;

[0059] S213, continue to obtain the continuous operation time of the sterilization and purification device, and determine whether the continuous operation time is greater than the second operation time;

[0060] S214, when the continuous running time is greater than the second running time, return to step S21;

[0061] S215, when the continuous operation time is less than or equal to the second operation time, maintaining the sterilization and purification device to continue operating in the fifth sterilization and purification mode;

[0062] Alternatively, the step S21 further includes the following steps:

[0063] S300, when the temperature difference value is greater than the second temperature value, obtaining a second holding time of the temperature difference value in the temperature range, and determining whether the second holding time reaches a preset threshold;

[0064] S301, when the second holding time reaches a preset threshold, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a sixth sterilization and purification mode; wherein the sixth sterilization and purification mode is that the circulating fan speed is in a high gear state, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an on state;

[0065] S302, continue to obtain the continuous operation time of the sterilization and purification device, and determine whether the continuous operation time is greater than the second operation time;

[0066] S303, when the continuous running time is greater than the second running time, return to step S21;

[0067] S304: When the continuous operation time is less than or equal to the second operation time, maintaining the sterilization and purification device to continue operating in the sixth sterilization and purification mode.

[0068] The present invention also provides a household refrigerator, comprising a refrigerator body, and also comprising a refrigerator door switch sensor arranged in a compartment of the refrigerator body, a particle sensor for obtaining the concentration of air pollutants, a temperature sensor for obtaining the temperature in the compartment, a sterilization and purification device, and a control system, wherein the sterilization and purification device is installed on the refrigerator liner, the sterilization and purification device comprises a circulating fan, an ultraviolet sterilization module, and a negative ion sterilization module, the rotating speed of the circulating fan has any one of a low speed gear state, a medium speed gear state, and a high speed gear state, the ultraviolet sterilization module has any one of an open state and a closed state, and the negative ion sterilization module has any one of an open state and a closed state; the control system comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of a control method for sterilizing and purifying a household refrigerator as described above are implemented.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] The present invention provides a household refrigerator and a control method for sterilization and purification thereof. When the refrigerator compartment door is in an open state, the continuous opening time of the refrigerator compartment door is obtained. When the continuous opening time is greater than a first opening time, it is determined that the outside air and the air in the compartment have undergone preliminary convection exchange, the sterilization and purification device arranged in the compartment is started, and the sterilization and purification device is controlled to enter a first sterilization and purification mode. The real-time door state of the sterilization and purification device after entering the first sterilization and purification mode is obtained. When the refrigerator compartment door is in an open state and the continuous opening time is greater than a second opening time, it is determined that the outside air and the air in the compartment have undergone sufficient convection exchange, and the sterilization and purification device is controlled to enter a second sterilization and purification mode. The present application can effectively remove bacteria and odors in the air in the ice compartment, and can also effectively remove the pollution of the outside air to the refrigerator during normal door opening. In addition, the present application also fully considers the temperature change in the refrigerator to carry out corresponding processing, further improving the effect of sterilization and purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 the structures shown in these drawings without paying creative work.

[0072] Figure 1 is a schematic diagram of a flow chart in one embodiment of the present invention;

[0073] Figure 2This is an application scenario diagram of the overall structure in one embodiment of the present invention;

[0074] Figure 3 It is a schematic diagram of the overall structure of one embodiment of the present invention;

[0075] Figure 4 is a schematic diagram of the overall structure from another perspective in one embodiment of the present invention;

[0076] Figure 5 This is a schematic diagram of the structure of the overall structure in one embodiment of the present invention without the base;

[0077] Figure 6 It is a schematic structural diagram of the overall structure without the base in another viewing angle of one embodiment of the present invention;

[0078] Figure 7 It is a front schematic diagram of the overall structure in one embodiment of the present invention;

[0079] Figure 8 for Figure 7 Schematic diagram of the cross section along the AA direction.

[0080] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

[0081] Description of Figure Numbers:

[0082] 1. Sterilization and purification device; 10. Base; 110. Second vertical connection hole; 120. Screw; 20. Sterilization and purification component; 210. Pre-filter component; 220. Disinfection and sterilization component; 230. Polluted particle filtering component; 240. Circulation fan; 241. Air outlet; 30. Shell; 310. Accommodation chamber; 311. First chamber; 312. Second chamber; 320. Air inlet; 330. Air outlet; 340. Enclosure; 341. Air hole; 342, first vertical plug-in slot; 343, second vertical plug-in slot; 344, third vertical plug-in slot; 350, connecting column; 351, first vertical connecting hole; 360, first space; 361, ultraviolet sterilization component; 370, second space; 40, decorative cover component; 410, outer decorative cover; 420, inner decorative cover; 430, air supply channel; 50, compartment; 60, refrigerator door switch sensor; 70, particle sensor; 80, temperature sensor. DETAILED DESCRIPTION

[0083] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0084] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0085] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0086] In addition, the descriptions of "right part", "middle part" and the like in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "right part" and "middle part" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0087] Please see attached Figure 2 The present invention also provides a household refrigerator, comprising a refrigerator body, a refrigerator door switch sensor 60 arranged in a compartment 50 of the refrigerator body, a particle sensor 70 for obtaining the concentration of air pollutants, a temperature sensor 80 for obtaining the temperature in the compartment 50, a sterilization and purification device 1 and a control system, wherein the sterilization and purification device 1 is installed on the refrigerator liner, the sterilization and purification device 1 comprises a circulation fan 240, an ultraviolet sterilization module and a negative ion sterilization module, the speed of the circulation fan 240 has any one of a low speed gear state, a medium speed gear state and a high speed gear state, the ultraviolet sterilization module has any one of an open state and a closed state, and the negative ion sterilization module has any one of an open state and a closed state; the control system comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of a control method for sterilizing and purifying a household refrigerator as described below are implemented.

[0088] Please see attached Figures 3 to 8 As a preferred embodiment, the sterilization and purification device 1 of the present application includes a base 10, a sterilization and purification component 20, and a shell 30 with an opening at the top, wherein:

[0089] The base 10 is connected to the top of the housing 30, and the base 10 is used to connect to the refrigerator liner (not shown in the figure); for example, a snap-in groove can be provided in the refrigerator liner, and a snap-in joint can be provided at a corresponding position of the base 10, and the connection is achieved by snapping the two together;

[0090] A accommodating chamber 310 is formed between the shell 30 and the base 10, and a baffle 340 is protruding upward on the inner wall of the bottom plate of the shell 30, and the baffle 340 separates the accommodating chamber 310 into a first chamber 311 and a second chamber 312. An air inlet 320 connected to the first chamber 311 is provided on the side wall of the shell 30, and an air outlet 330 connected to the second chamber 312 is provided on the bottom of the shell 30; the baffle 340 can effectively separate the accommodating chamber 310, so that after the air enters from the air inlet 320, it will not be discharged directly through the air outlet 330, but will pass through the sterilization and purification component 20 of the present application in sequence and then be discharged through the air outlet 330.

[0091] The sterilization and purification component 20 is arranged in the first chamber 311, and the sterilization and purification component 20 includes a pre-filter component 210, a disinfection and sterilization component 220, a pollution particle filtering component 230 and a circulating fan 240 which are arranged in sequence along the air flow direction. The pre-filter component 210 is arranged close to the air inlet 320, and the circulating fan 240 is arranged away from the air inlet 320. The circulating fan 240 includes an air inlet end (not shown in the figure) and an air outlet end 241. The air inlet end is close to the pollution particle filtering component 230. The enclosure 340 is provided with an air hole 341 matching the air outlet end 241, so that the air from the air outlet end 241 enters the refrigerator compartment 50 through the air outlet 330.

[0092] Specifically, air enters the first chamber 311 through the air inlet 320 opened on the side wall of the shell 30. In the first chamber 311, the air passes through the pre-filter component 210, the disinfection and sterilization component 220, and the polluted particle filter component 230 in sequence. The air after filtration and sterilization and purification is sucked into the air inlet end of the circulation fan 240 and discharged through the air outlet end 241 of the circulation fan 240. The air outlet end 241 of the circulation fan 240 is connected with the second chamber 312 through the air hole 341 on the enclosure 340. The air enters the second chamber 312 and then enters the refrigerator compartment 50 through the air outlet 330 opened at the bottom of the shell 30, thereby realizing the circulation, sterilization and purification of the air in the refrigerator compartment 50.

[0093] Among them, the pre-filter component 210 is used for preliminary filtering of large particles of pollutants in the air, and can adopt the common pre-filter component 210 in the prior art, such as the activated carbon pre-filter component 210; the disinfection and sterilization component 220 preferably adopts a composite layer of granular activated carbon and silver ion filter, which has better disinfection and sterilization function; the polluted particle filter component 230 is used for further filtering fine particle pollutants in the air, and preferably adopts a HEAP layer (a high-efficiency air filter, mainly used for filtering tiny particles in the air); the circulating fan 240 provides power to circulate the air in the device and send the treated air into the refrigerator compartment 50.

[0094] The present application effectively removes harmful substances such as bacteria, viruses, particulate matter, etc. in the air through multiple treatments of pre-filtration, disinfection and sterilization, and contaminated particle filtration, and effectively improves the air quality in the refrigerator compartment 50; the air is continuously circulated in the device through the circulating fan 240, and the treated air is sent back into the refrigerator compartment 50 to ensure that the air in the entire refrigerator compartment 50 is effectively purified; the present application has a compact structure and is easy to install and disassemble; the sterilization and purification device 1 of the present application is not only suitable for the refrigerator compartment 50, but can also be used in other scenarios requiring air purification and sterilization as needed.

[0095] As a preferred embodiment, a connection column 350 is protruded upward from the inner wall of the bottom plate of the housing 30, and the connection column 350 is provided with a first vertical connection hole 351 for connection with a screw 120, and the connection seat is provided with a second vertical connection hole 110 arranged one-to-one with the first vertical connection hole 351, and the housing 30 is connected by the screw 120 penetrating the second vertical connection hole 110, the first vertical connection hole 351 and the base 10. The connection method of this embodiment simplifies the installation process, improves the installation efficiency, and facilitates the subsequent disassembly and maintenance work.

[0096] As a preferred embodiment, a first space 360 ​​is formed between the disinfection and sterilization component 220 and the polluted particle filtering component 230, a second space 370 is formed between the polluted particle filtering component 230 and the circulating fan 240, an ultraviolet sterilization component 361 is arranged in the first space 360, and a negative ion sterilization and purification component is arranged in the second space 370.

[0097] Specifically, the ultraviolet sterilization component 361 utilizes the high energy characteristics of ultraviolet rays to achieve efficient sterilization and disinfection, and can use the ultraviolet sterilization device with mature existing technology; the negative ion sterilization and purification component can release negative ions and can use negative ions for sterilization and deodorization, and can use the ultraviolet sterilization device with mature existing technology. This example can further improve the sterilization and purification effect.

[0098] Therefore, in combination with the above-mentioned embodiment, air enters the sterilization and purification device 1 through the air inlet 320, and is preliminarily cleared of large particles of pollutants in the refrigerator through the pre-filter component 210, and then enters the disinfection and sterilization component 220, and the passing air is preliminarily sterilized (for example, it can be the silver ion filter sterilization and disinfection in the disinfection and sterilization component 220) and preliminarily deodorized (for example, it can be the granular activated carbon deodorization in the disinfection and sterilization component 220), and enters the first space 360 ​​formed by the disinfection and sterilization component 220 and the polluted particle filtering component 230, and is sterilized by ultraviolet light, while the polluted particles are removed. The filter component 230 (for example, it can be a HEAP layer) can effectively prevent large particles of pollutants such as dust from passing through, so that bacteria and viruses adsorbed on its surface can be fully killed by ultraviolet rays. Under the full filtration of the polluted particle filter component 230, negative ion sterilization, purification, and odor removal are finally carried out in the second space 370 formed by the polluted particle filter component 230 and the circulating fan 240. In addition, the negative ions generated by the negative ion sterilization and purification component are returned to the refrigerator compartment 50 through the air outlet 330 under the action of the circulating fan 240, and the air in the refrigerator is further sterilized and deodorized.

[0099] Furthermore, the shell 30 is in a truncated cone shape that is larger at the top and smaller at the bottom, and the top of the shell 30 is open.

[0100] As a preferred embodiment, Figure 5-6 As shown, the inner wall of the enclosure 340 is formed with a first vertical plug-in slot 342 for the pre-filtering component 210 to be plugged in, a second vertical plug-in slot 343 for the disinfection component 220 to be plugged in, and a third vertical plug-in slot 344 for the contaminated particle filtering component 230 to be plugged in. The pre-filtering component 210 is plugged in the first vertical plug-in slot 342, the disinfection component 220 is plugged in the second vertical plug-in slot 343, and the contaminated particle filtering component 230 is plugged in the third vertical plug-in slot 344. This embodiment can greatly simplify the installation and disassembly process by plugging the plug-in slots and components.

[0101] As a preferred example, the number of the air inlets 320 is multiple, and the multiple air inlets 320 are evenly spaced and arranged on the side wall of the housing 30. It can be understood that the number and size of the air inlets 320 can be set according to actual needs. As a specific example, the number of the air inlets 320 is set to .

[0102] As another preferred embodiment, the housing 30 further includes a decorative cover assembly 40 disposed at the bottom of the housing 30, the decorative cover assembly 40 includes an outer decorative cover 410 and an inner decorative cover 420, the inner decorative cover 420 and the housing 30 are detachably connected, the outer decorative cover 410 and the inner decorative cover 420 are fixedly connected, and the bottom of the outer decorative cover 410 and the bottom of the housing 30 form an air supply channel 430. Specifically, the outer decorative cover 410 is a visible part of the bottom of the housing 30, and its design often focuses on aesthetics. The inner decorative cover 420 is located between the housing 30 and the outer decorative cover 410, and plays a role in protecting the internal structure and components of the housing 30. The air supply channel 430 formed between the outer decorative cover 410 and the bottom of the housing 30, for example, can allow the air flow path to pass through the air outlet 330 from the housing 30 and then be sent to the refrigerator compartment 50 in the nearly horizontal air supply channel 430.

[0103] Furthermore, a buckle (not shown) is provided on the outer wall of the bottom plate of the housing 30, and a third connection hole (not shown) matching the buckle is provided on the inner decoration cover 420, and the buckle is engaged with the third connection hole to enable a detachable connection between the housing 30 and the inner decoration cover 420. By adopting the buckle connection method, the installation and removal process is simple and quick.

[0104] Furthermore, the diameter of the air inlet 320 is greater than the diameter of the air outlet 330 .

[0105] Please see attached Figure 1 In one embodiment of the present invention, a control method for sterilizing and purifying a household refrigerator includes the following steps:

[0106] S11, when the refrigerator compartment door (not shown) is in an open state, the continuous opening time of the refrigerator compartment door is obtained, and it is determined whether the continuous opening time is greater than the first opening time. Specifically, a door switch sensor can be provided on the inner wall of the compartment 50 to detect the switch state of the refrigerator compartment door in real time. When it is detected that the refrigerator compartment door is in an open state, the door opening time, i.e., the continuous opening time, is detected and recorded.

[0107] It is worth noting for those skilled in the art that, according to the user's behavior habits when using the refrigerator and the survey and research results on the influence of outside air on the air in the box at different door opening times, the situation where the continuous opening time is less than 60 seconds is a user's misoperation. This time is relatively short, and the outside air basically does not exchange with the air in the box through convection; the continuous opening time of 60 seconds to 300 seconds is the time when the user normally takes a small amount of food out of the refrigerator. During this time period, the outside air will have a preliminary convection exchange with the air in the box, and the probability of influence is about less than 30%; the continuous opening time of 300 seconds to 600 seconds is the time when the user stores a large amount of food. During this time period, the outside air will have a sufficient convection exchange with the air in the box, and the probability of influence is about greater than 80%; when the continuous opening time is greater than 600 seconds, this exceeds the time when the user normally opens the refrigerator door and is an abnormal condition, such as poor closure of the refrigerator door, abnormality of the refrigerator system, etc. Therefore, in a preferred example, the first opening time is set to 60s, the second opening time is set to 300s, and the third opening time is set to 600s.

[0108] S12, when the continuous opening time is greater than the first opening time, it is determined that the outside air and the air in the compartment 50 have a preliminary convection exchange, the sterilization and purification device 1 arranged in the compartment 50 is started, and the sterilization and purification device 1 is controlled to enter the first sterilization and purification mode; wherein the sterilization and purification device 1 includes a circulating fan 240, an ultraviolet sterilization module (i.e., the above-mentioned ultraviolet sterilization component 361) and a negative ion sterilization module (i.e., the above-mentioned negative ion sterilization component), the speed of the circulating fan 240 has any one of a low speed gear state, a medium speed gear state, and a high speed gear state, the ultraviolet sterilization module has any one of an open state and a closed state, and the negative ion sterilization module has any one of an open state and a closed state; the first sterilization and purification mode is that the speed of the circulating fan 240 is in a low speed gear state, the ultraviolet sterilization module is in an open state, and the negative ion sterilization module is in a closed state;

[0109] Combined with the above description, when the continuous opening time is greater than the first opening time, for example, greater than 60s, during this time period, the outside air will undergo preliminary convection exchange with the air in the box, and the air in the refrigerator will inevitably exchange with the air in the external environment, which is easy to cause secondary pollution of the air in the refrigerator. However, there is basically no means to deal with this situation in the prior art or it is ignored. In the prior art, the sterilization components of most refrigerators perform regular periodic cyclic sterilization and purification when the refrigerator compartment door is in a closed state. Compared with the single sterilization and purification technology of the existing refrigerator, the sterilization and purification device 1 provided in this application has a total of six sterilization and purification modes, specifically:

[0110] The first sterilization and purification mode is that the speed of the circulating fan 240 is in the low gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-off state; the second sterilization and purification mode is that the speed of the circulating fan 240 is in the medium gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-off state; the third sterilization and purification mode is that the speed of the circulating fan 240 is in the high gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-off state; the fourth sterilization and purification mode is that the speed of the circulating fan 240 is in the low gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-on state; the fifth sterilization and purification mode is that the speed of the circulating fan 240 is in the medium gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-on state; the sixth sterilization and purification mode is that the speed of the circulating fan 240 is in the high gear state, the ultraviolet sterilization module is in the turned-on state, and the negative ion sterilization module is in the turned-on state;

[0111] It should be noted that for the first sterilization and purification mode, since the user opens the refrigerator for a short time, the number of suspended pollutants such as dust in the ambient air and bacteria entering are relatively small, and in order to avoid harm to the human body from ozone produced by negative ions, only ultraviolet sterilization is turned on when the door is opened, and negative ion sterilization is not turned on, and the circulating fan 240 wind speed is set to low speed.

[0112] For the second sterilization and purification mode, since the user opens the refrigerator for a relatively long time, the number of suspended pollutants such as dust in the ambient air and bacteria that enter is relatively large, and in order to avoid the harm of ozone produced by negative ions to the human body, only ultraviolet sterilization is turned on when the door is opened, and negative ion sterilization is not turned on. The circulating fan 240 is in medium speed to speed up air renewal.

[0113] For the third sterilization and purification mode, i.e. the super filtration mode, if the refrigerator is in a highly polluted air environment, it can solve the problem that after the user opens and closes the door, when the first sterilization and purification mode and the second sterilization and purification mode cannot completely remove the suspended pollutants such as dust and bacteria from the outside air entering the refrigerator, the air in the box can be quickly purified to avoid continuous contamination of food.

[0114] When the continuous opening time is less than 60 seconds or greater than 600 seconds, the sterilization and purification device 1 defaults that the refrigerator is in an abnormal state and stops working to avoid energy waste.

[0115] The circulating fan 240 has three wind speed gears, namely, a low speed gear, a medium speed gear and a high speed gear. The gears can be set in advance. By setting the three wind speed gears, the gas entering the compartment 50 can be circulated.

[0116] It is also worth noting for those skilled in the art that the present application uses the temperature change in the refrigerator to indirectly determine the amount of food that the user has put into the refrigerator. Putting in room temperature food will cause the temperature in the refrigerator to rise. The more food there is, the higher the temperature rises. In addition, through the study and analysis of the changes in the food storage process, because during the storage process of food, some components of the food itself (enzymes) or microorganisms such as bacteria will react chemically with components such as oxygen in the air, these chemical reactions will also release heat, which will also cause the temperature of the refrigerator to rise.

[0117] The fourth / fifth / sixth sterilization and purification mode, after the refrigerator door is closed, uses different temperature differences to judge the amount of food the user has put into the refrigerator, the degree to which the air in the box is affected by the outside world, the length of time the refrigerator door is closed, and the working time of the sterilization and purification mode. Based on comprehensive considerations, different sterilization intensity modes are set. The combination of different modes can sterilize and purify more effectively and quickly, avoiding insufficient sterilization or too long sterilization time. Since the fourth / fifth / sixth sterilization and purification mode is in the state of the refrigerator door being closed, the negative ion sterilization module is turned on in these three modes. The difference is that the gear of the circulating fan 240 speed is different.

[0118] S13, obtaining the real-time state of the door of the refrigerator compartment 50 after the sterilization and purification device 1 enters the first sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time state of the door of the refrigerator compartment 50;

[0119] S14, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a second opening time length; wherein the second opening time length is greater than the first opening time length;

[0120] S151, when the continuous opening time is greater than the second opening time, it is determined that sufficient convection exchange occurs between the outside air and the air in the compartment 50, and the sterilization and purification device 1 is controlled to enter the second sterilization and purification mode; wherein the second sterilization and purification mode is that the speed of the circulating fan 240 is in the medium speed gear state, the ultraviolet sterilization module is in the open state, and the negative ion sterilization module is in the closed state;

[0121] Specifically, when the continuous opening time is greater than the second opening time, for example, the continuous opening time is between 60s and 300s, during this time period, the outside air will undergo a sufficient convection exchange with the air in the box. At this time, the sterilization and purification device 1 is controlled to enter the second sterilization and purification mode. Compared with the first sterilization and purification mode, the speed of the circulating fan 240 is adjusted from the low speed state to the medium speed state, thereby accelerating air renewal.

[0122] S152, when the continuous opening time is less than or equal to the second opening time, the sterilization and purification device 1 is maintained to continue to operate in the first sterilization and purification mode. During this period of time, the outside air will undergo a preliminary convection exchange with the air in the box, and at this time, the sterilization and purification device 1 is maintained to continue to operate in the first sterilization and purification mode. Among them, steps S151 and S152 are two branches for determining whether the continuous opening time is greater than the second opening time.

[0123] In the present application, the refrigerator door opening status can be actively identified, and different sterilization and purification modes can be actively entered according to the continuous opening time. It can not only effectively remove bacteria and odors in the air in the refrigerator, but also effectively remove the secondary pollution of the refrigerator by the outside air during normal door opening. In addition, the present application effectively removes harmful substances such as bacteria, viruses, particulate matter, etc. in the air through multiple treatments, effectively improving the air quality in the refrigerator compartment 50.

[0124] As a preferred implementation, the step S151 further includes the following steps:

[0125] S1511, obtaining the real-time state of the door 50 of the sterilization and purification device 1 after entering the second sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time state of the door 50 of the refrigerator compartment;

[0126] S1512, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a third opening time length; wherein the third opening time length is greater than the second opening time length;

[0127] S1513, when the continuous opening time is greater than the third opening time length, it is determined that the refrigerator is in an abnormal state, and the sterilization and purification device 1 is controlled to be in a closed state;

[0128] S1514: When the continuous opening time is less than or equal to the third opening time, the sterilization and purification device 1 is maintained to continue operating in the second sterilization and purification mode.

[0129] Specifically, when the continuous opening time is greater than the third opening time, for example, greater than 600 seconds, the sterilization and purification device 1 defaults to that the refrigerator is in an abnormal condition and stops working to avoid energy waste; when the continuous opening time is less than or equal to the third opening time, for example, less than 600 seconds, the second sterilization and purification mode can be maintained.

[0130] As a preferred embodiment, the step S13 further includes the following steps:

[0131] S131, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device 1 to continue operating in the first sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device 1 after the refrigerator compartment door is closed;

[0132] S132, determine whether the continuous working time is greater than the set working time; if so, execute steps S133 to S134, if not, execute step S135;

[0133] S133, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the compartment 50, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0134] S134, when the air pollutant concentration is less than the preset concentration value, it is determined that the air in the compartment 50 is in a normal state, and the sterilization and purification device 1 is controlled to be in a closed state;

[0135] S135 , when the continuous working time is less than or equal to the set working time, maintaining the sterilization and purification device 1 to continue operating in the first sterilization and purification mode.

[0136] Specifically, after detecting that the refrigerator compartment door is closed, the sterilization and purification device 1 maintains the first sterilization and purification mode and continues to work. When the continuous working time is greater than the set working time (preferably, the set working time is set to 10 minutes), the setting of the set working time can enable the air in the compartment 50 to be sterilized and purified for a longer period of time. The concentration of air pollutants in the compartment 50 can be detected after 10 minutes. If it is detected that the particle concentration of the pollutants in the refrigerator is less than the preset concentration value, the sterilization and purification device 1 stops working.

[0137] Furthermore, the step S133 further includes the following steps:

[0138] S1331, when the concentration of the air pollutants is greater than or equal to the preset concentration value, controlling the sterilization and purification device 1 to enter the third sterilization and purification mode; wherein the third sterilization and purification mode is that the speed of the circulating fan 240 is at a high gear, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an off state;

[0139] S1332, obtaining the concentration of air pollutants in the compartment 50, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0140] S1333, when the air pollutant concentration is less than the preset concentration value, it is determined that the air in the compartment 50 is in a normal state, and the sterilization and purification device 1 is controlled to be in a closed state;

[0141] S1334: When the air pollutant concentration is greater than or equal to a preset concentration value, the sterilization and purification device 1 is maintained to continue operating in the third sterilization and purification mode.

[0142] Specifically, if the particle sensor 70 detects that the particle concentration of pollutants in the refrigerator is greater than or equal to a preset value, the sterilization and purification device 1 enters the third sterilization and purification mode, and the speed of the circulating fan 240 is changed to a high gear, while the others remain unchanged until the particle sensor 70 detects that the particle concentration of pollutants in the refrigerator is less than a preset value, and then the sterilization and purification device 1 stops working.

[0143] Furthermore, the step S1511 further includes the following steps:

[0144] S15111, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device 1 to continue operating in the second sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device 1 after the refrigerator compartment door is closed;

[0145] S15112, determine whether the continuous working time is greater than the set working time; if so, execute steps S15113 to S15115, if not, execute step S15116;

[0146] S15113, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the compartment 50, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0147] S15114, when the air pollutant concentration is less than the preset concentration value, it is determined that the air in the compartment 50 is in a normal state, and the sterilization and purification device 1 is controlled to be in a closed state;

[0148] S15115, when the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331;

[0149] S15116: When the continuous working time is less than or equal to the set working time, the sterilization and purification device 1 is maintained to continue operating in the second sterilization and purification mode.

[0150] Specifically, when it is detected that the refrigerator door is closed, as a preferred example, the set working time can be set to 10 minutes to ensure sufficient sterilization and purification time. When the continuous working time is greater than the set working time, if it is detected that the particle concentration of pollutants in the refrigerator is less than the preset concentration value, the sterilization and purification device 1 stops working. If the particle sensor 70 detects that the particle concentration of pollutants in the refrigerator is greater than or equal to the preset concentration value, the sterilization and purification device 1 enters the third sterilization and purification mode, and the speed of the circulating fan 240 is changed to a high gear, and the others remain unchanged until the particle sensor 70 detects that the particle concentration of pollutants in the refrigerator is less than the preset value, and the sterilization and purification device 1 stops working.

[0151] As another preferred embodiment, the step of:

[0152] S21, when the refrigerator compartment door is in a closed state, the actual temperature in the compartment 50 and the startup temperature of the compartment 50 are obtained, and the temperature difference between the actual temperature and the startup temperature is determined; specifically, the temperature value in the compartment 50 can be obtained by a temperature sensor 80 arranged in the compartment 50, the actual temperature in the compartment 50 is variable, and the startup temperature of the compartment 50 is a fixed value, so the temperature change in the compartment 50 can be determined by determining the temperature difference between the actual temperature and the startup temperature, so as to determine different sterilization and purification modes according to different temperature difference values;

[0153] S22, when the temperature difference is less than or equal to the first temperature value, detect whether the sterilization and purification device 1 is in a working state; specifically, the first temperature value is less than the second temperature value. In a preferred example, the first temperature value can be set to 2K, which is regarded as a critical value for judging that the temperature fluctuates in a small range. When the temperature difference is less than or equal to the first temperature value, it indicates that the temperature change in the compartment 50 is small.

[0154] S23, when the sterilization and purification device 1 is in working state, obtain the continuous operation time of the sterilization and purification device 1, and determine whether the continuous operation time is less than the first operation time. If so, execute step S241, if not, execute steps S242 to S243; in a preferred example, the first operation time is set to 20 minutes.

[0155] S241, controlling the sterilization and purification device 1 to enter the fifth sterilization and purification mode; wherein the fifth sterilization and purification mode is that the speed of the circulating fan 240 is in the medium speed gear state, the ultraviolet sterilization module is in the on state, and the negative ion sterilization module is in the on state;

[0156] S242, determining whether the continuous operation duration is less than a second operation duration; wherein the second operation duration is greater than the first operation duration; in a preferred example, the second operation duration is set to 30 minutes.

[0157] S243, when the continuous operation time is less than the second operation time, control the sterilization and purification device 1 to enter the fourth sterilization and purification mode; wherein, the fourth sterilization and purification mode is that the speed of the circulating fan 240 is in a low speed state, the ultraviolet sterilization module is in the on state, and the negative ion sterilization module is in the on state.

[0158] Specifically, those skilled in the art should note that putting food at room temperature in the refrigerator will cause the temperature inside the refrigerator to rise. The more food there is, the higher the temperature will rise. In addition, through research and analysis of changes in the food storage process, during the storage process, some components of the food itself (enzymes) or microorganisms such as bacteria will undergo chemical reactions with components such as oxygen in the air. These chemical reactions also release heat, which will also cause the temperature of the refrigerator to rise.

[0159] When the continuous operation time is less than the first operation time, the sterilization and purification device 1 is controlled to enter the fifth sterilization and purification mode, and the medium-speed fan speed is used for processing; when the continuous operation time is greater than or equal to the first operation time, the sterilization and purification device 1 is controlled to enter the fourth sterilization and purification mode, while ensuring the sterilization and purification effect as much as possible, reducing energy consumption and saving resources. Further, if the continuous operation time is greater than the second operation time, for example, after 30 minutes, it is detected whether the concentration of air pollutants in the compartment 50 is less than the preset concentration value. If so, the sterilization and purification device 1 is controlled to stop working. If not, the sterilization and purification device 1 is controlled to enter the third sterilization and purification mode.

[0160] As a preferred embodiment, the step S22 further includes the following steps:

[0161] S221, when the sterilization and purification device 1 is not in working state, obtain the stop working time of the sterilization and purification device 1, and determine whether the stop working time is greater than the first stop time; if so, it means that the stop time is longer at this time, and step S222 is executed; if not, it means that the stop time is shorter at this time, and steps S223 to S225 are executed; as a preferred example, the first stop time is set to 3 hours;

[0162] S222, starting the sterilization and purification device 1, and controlling the sterilization and purification device 1 to enter a fifth sterilization and purification mode;

[0163] S223, obtaining the concentration of air pollutants in the compartment 50, and determining whether the concentration of air pollutants is less than a preset concentration value;

[0164] S224, when the concentration of air pollutants is less than the preset concentration value, it is determined that the air in the compartment 50 is in a normal state, and the sterilization and purification device 1 is controlled to be in a closed state;

[0165] S225: When the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331.

[0166] Furthermore, the step S222 further includes the following steps:

[0167] S2221, obtaining the continuous operation time of the sterilization and purification device 1, and determining whether the continuous operation time is greater than the first operation time;

[0168] S2222, when the continuous operation time is greater than the first operation time, controlling the sterilization and purification device 1 to enter the fourth sterilization and purification mode; preferably, the first operation time is set to 20 minutes;

[0169] S2223, continue to determine whether the continuous running time is greater than the second running time; preferably, the second running time is set to 30 minutes;

[0170] S2224, when the continuous operation time is greater than the second operation time, the concentration of air pollutants in the compartment 50 is obtained, and it is determined whether the concentration of air pollutants is less than a preset concentration value. If so, the sterilization and purification device 1 is controlled to be in a closed state; if not, the process proceeds to step S1331.

[0171] Furthermore, the step S21 further includes the following steps:

[0172] S211, when the temperature difference value is greater than the first temperature value and less than or equal to the second temperature value, obtain the first holding time of the temperature difference value in the temperature range, and determine whether the first holding time reaches a preset threshold; preferably, the first holding time is set to 600s and the second temperature value is set to 5K.

[0173] S212, when the first holding time reaches a preset threshold, starting the sterilization and purification device 1, and controlling the sterilization and purification device 1 to enter a fifth sterilization and purification mode;

[0174] S213, continue to obtain the continuous operation time of the sterilization and purification device 1, and determine whether the continuous operation time is greater than the second operation time;

[0175] S214, when the continuous running time is greater than the second running time, return to step S21;

[0176] S215, when the continuous operation time is less than or equal to the second operation time, maintaining the sterilization and purification device 1 to continue operating in the fifth sterilization and purification mode;

[0177] Alternatively, the step S21 further includes the following steps:

[0178] S300, when the temperature difference value is greater than the second temperature value, obtain the second holding time of the temperature difference value in the temperature range, and determine whether the second holding time reaches a preset threshold; preferably, the second holding time is set to 600s.

[0179] S301, when the second holding time reaches a preset threshold, start the sterilization and purification device 1, and control the sterilization and purification device 1 to enter the sixth sterilization and purification mode; wherein the sixth sterilization and purification mode is that the speed of the circulating fan 240 is in a high gear state, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an on state;

[0180] S302, continue to obtain the continuous operation time of the sterilization and purification device 1, and determine whether the continuous operation time is greater than the second operation time;

[0181] S303, when the continuous running time is greater than the second running time, return to step S21;

[0182] S304: When the continuous operation time is less than or equal to the second operation time, the sterilization and purification device 1 is maintained to continue operating in the sixth sterilization and purification mode.

[0183] The embodiment of the present application can actively identify changes in temperature, pollution level and refrigerator door status in the refrigerator, actively turn on the sterilization and purification device 1, and adjust different sterilization and purification modes, which can avoid the sterilization and deodorization time being too short and having poor effect, and can also avoid the sterilization and deodorization time being too long and wasting resources.

[0184] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A control method for sterilizing and purifying a household refrigerator, characterized in that: The following steps are involved: S11, when the refrigerator compartment door is in an open state, obtaining the continuous opening time of the refrigerator compartment door, and determining whether the continuous opening time is greater than a first opening time length; S12, when the continuous opening time is greater than the first opening time, it is determined that the outside air and the air in the room have undergone preliminary convection exchange, the sterilization and purification device arranged in the room is started, and the sterilization and purification device is controlled to enter the first sterilization and purification mode; wherein the sterilization and purification device includes a circulating fan, an ultraviolet sterilization module and a negative ion sterilization module, the rotating speed of the circulating fan has any one of a low speed gear state, a medium speed gear state and a high speed gear state, the ultraviolet sterilization module has any one of an open state and a closed state, and the negative ion sterilization module has any one of an open state and a closed state; the first sterilization and purification mode is that the rotating speed of the circulating fan is in a low speed gear state, the ultraviolet sterilization module is in an open state, and the negative ion sterilization module is in a closed state; S13, obtaining a real-time door state of the sterilization and purification device after entering the first sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time door state; S14, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a second opening time length; wherein the second opening time length is greater than the first opening time length; S151, when the continuous opening time is greater than the second opening time, it is determined that sufficient convection exchange occurs between the outside air and the indoor air, and the sterilization and purification device is controlled to enter the second sterilization and purification mode; wherein the second sterilization and purification mode is that the circulating fan speed is in the medium speed gear state, the ultraviolet sterilization module is in the open state, and the negative ion sterilization module is in the closed state; S152: When the continuous opening time is less than or equal to the second opening time, the sterilization and purification device is maintained to continue operating in the first sterilization and purification mode.

2. The control method for sterilizing and purifying a household refrigerator according to claim 1, characterized in that: The step S151 further includes the following steps: S1511, obtaining the real-time door state of the sterilization and purification device after entering the second sterilization and purification mode, and judging whether the refrigerator compartment door is in an open state according to the real-time door state; S1512, when the refrigerator compartment door is in an open state, determining whether the continuous opening time is greater than a third opening time length; wherein the third opening time length is greater than the second opening time length; S1513, when the continuous opening time is greater than the third opening time length, it is determined that the refrigerator is in an abnormal state, and the sterilization and purification device is controlled to be in a closed state; S1514: When the continuous opening time is less than or equal to the third opening time, the sterilization and purification device is maintained to continue operating in the second sterilization and purification mode.

3. The control method for sterilizing and purifying a household refrigerator according to claim 2, characterized in that: The step S13 further includes the following steps: S131, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device to continue operating in the first sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device after the refrigerator compartment door is closed; S132, determine whether the continuous working time is greater than the set working time; if so, execute steps S133 to S134, if not, execute step S135; S133, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value; S134, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state; S135: When the continuous working time is less than or equal to the set working time, the sterilization and purification device is maintained to continue operating in the first sterilization and purification mode.

4. The control method for sterilizing and purifying a household refrigerator according to claim 3, characterized in that: The step S133 further includes the following steps: S1331, when the concentration of the air pollutants is greater than or equal to the preset concentration value, controlling the sterilization and purification device to enter a third sterilization and purification mode; wherein the third sterilization and purification mode is that the speed of the circulating fan is at a high gear, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an off state; S1332, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value; S1333, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state; S1334: When the air pollutant concentration is greater than or equal to a preset concentration value, maintaining the sterilization and purification device to continue operating in the third sterilization and purification mode.

5. The control method for sterilizing and purifying a household refrigerator according to claim 4, characterized in that: The step S1511 further includes the following steps: S15111, when the refrigerator compartment door is in a closed state, maintaining the sterilization and purification device to continue operating in the second sterilization and purification mode, and obtaining the continuous working time of the sterilization and purification device after the refrigerator compartment door is closed; S15112, determine whether the continuous working time is greater than the set working time; if so, execute steps S15113 to S15115, if not, execute step S15116; S15113, when the continuous working time is greater than the set working time, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value; S15114, when the concentration of the air pollutants is less than the preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state; S15115, when the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331; S15116: When the continuous working time is less than or equal to the set working time, the sterilization and purification device is maintained to continue operating in the second sterilization and purification mode.

6. The control method for sterilizing and purifying a household refrigerator according to claim 4, characterized in that: Also includes the steps: S21, when the refrigerator compartment door is in a closed state, obtaining the actual temperature in the compartment and the startup temperature of the compartment, and determining the temperature difference between the actual temperature and the startup temperature; S22, when the temperature difference is less than or equal to the first temperature value, detecting whether the sterilization and purification device is in a working state; S23, when the sterilization and purification device is in working state, obtaining the continuous operation time of the sterilization and purification device, and determining whether the continuous operation time is less than the first operation time, if so, executing step S241, if not, executing steps S242 to S243; S241, controlling the sterilization and purification device to enter the fifth sterilization and purification mode; wherein the fifth sterilization and purification mode is that the circulating fan speed is in the medium speed state, the ultraviolet sterilization module is in the on state, and the negative ion sterilization module is in the on state; S242, determining whether the continuous operation duration is less than a second operation duration; wherein the second operation duration is greater than the first operation duration; S243, when the continuous operation time is less than the second operation time, controlling the sterilization and purification device to enter the fourth sterilization and purification mode; wherein, the fourth sterilization and purification mode is that the circulating fan speed is in a low speed state, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an on state.

7. The control method for sterilizing and purifying a household refrigerator according to claim 6, characterized in that: The step S22 further includes the following steps: S221, when the sterilization and purification device is not in working state, obtaining the stop working time of the sterilization and purification device, and judging whether the stop working time is greater than the first stop time; if so, executing step S222, if not, executing steps S223 to S225; S222, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a fifth sterilization and purification mode; S223, obtaining the concentration of air pollutants in the room, and determining whether the concentration of air pollutants is less than a preset concentration value; S224, when the concentration of air pollutants is less than a preset concentration value, determining that the air in the room is in a normal state, and controlling the sterilization and purification device to be in a closed state; S225: When the air pollutant concentration is greater than or equal to the preset concentration value, proceed to step S1331.

8. The control method for sterilizing and purifying a household refrigerator according to claim 7, characterized in that: The step S222 further includes the following steps: S2221, obtaining the continuous operation time of the sterilization and purification device, and determining whether the continuous operation time is greater than the first operation time; S2222, when the continuous operation time is greater than the first operation time, controlling the sterilization and purification device to enter a fourth sterilization and purification mode; S2223, continue to determine whether the continuous running time is greater than the second running time; S2224, when the continuous operation time is greater than the second operation time, the concentration of air pollutants in the room is obtained, and it is determined whether the concentration of air pollutants is less than a preset concentration value. If so, the sterilization and purification device is controlled to be in a closed state; if not, enter step S1331.

9. The control method for sterilizing and purifying a household refrigerator according to claim 7, characterized in that: The step S21 further includes the following steps: S211, when the temperature difference value is greater than the first temperature value and less than or equal to the second temperature value, obtaining a first holding time of the temperature difference value in the temperature range, and determining whether the first holding time reaches a preset threshold; S212, when the first holding time reaches a preset threshold, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a fifth sterilization and purification mode; S213, continue to obtain the continuous operation time of the sterilization and purification device, and determine whether the continuous operation time is greater than the second operation time; S214, when the continuous running time is greater than the second running time, return to step S21; S215, when the continuous operation time is less than or equal to the second operation time, maintaining the sterilization and purification device to continue operating in the fifth sterilization and purification mode; Alternatively, the step S21 further includes the following steps: S300, when the temperature difference value is greater than the second temperature value, obtaining a second holding time of the temperature difference value in the temperature range, and determining whether the second holding time reaches a preset threshold; S301, when the second holding time reaches a preset threshold, starting the sterilization and purification device, and controlling the sterilization and purification device to enter a sixth sterilization and purification mode; wherein the sixth sterilization and purification mode is that the circulating fan speed is in a high gear state, the ultraviolet sterilization module is in an on state, and the negative ion sterilization module is in an on state; S302, continue to obtain the continuous operation time of the sterilization and purification device, and determine whether the continuous operation time is greater than the second operation time; S303, when the continuous running time is greater than the second running time, return to step S21; S304: When the continuous operation time is less than or equal to the second operation time, maintaining the sterilization and purification device to continue operating in the sixth sterilization and purification mode.

10. A household refrigerator, comprising a refrigerator body, characterized in that: It also includes a refrigerator door switch sensor arranged in the compartment of the refrigerator body, a particle sensor for obtaining the concentration of air pollutants, a temperature sensor for obtaining the temperature in the compartment, a sterilization and purification device and a control system, wherein the sterilization and purification device is installed on the refrigerator liner, and the sterilization and purification device includes a circulating fan, an ultraviolet sterilization module and a negative ion sterilization module. The speed of the circulating fan has any one of a low speed state, a medium speed state, and a high speed state. The ultraviolet sterilization module has any one of an open state and a closed state. The negative ion sterilization module has any one of an open state and a closed state; the control system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the steps of a control method for sterilizing and purifying a household refrigerator as described in any one of claims 1 to 9 are implemented.

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