Refrigeration door seal cold leakage detection system based on refrigerator defrosting cycle characteristics

Abstract

The invention provides a refrigeration door seal cold leakage detection system based on refrigerator defrosting period characteristics, and the system comprises a refrigerator data acquisition module which is configured to acquire the operation characteristics of a target refrigerator; the operation cycle division module is configured to perform cycle division on the operation characteristics of the target refrigerator according to the cold leakage characteristic standard of the refrigeration door of the refrigerator and the cold leakage detection mark, and each operation characteristic of the target refrigerator comprises a plurality of operation cycles; each operation cycle is divided into a first operation cycle and a second operation cycle; and the refrigerator cold leakage detection module is configured to perform cold leakage detection on the first operation cycle, the second operation cycle, the operation cycle and the refrigerator equipment characteristics in the same operation cycle according to a cold leakage preset standard. According to the system, the problem that redundant sensors need to be arranged for cold leakage detection of the refrigeration door of an existing refrigerator is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator door seal cold leakage detection, and in particular to a refrigeration door seal cold leakage detection system based on refrigerator defrost cycle characteristics. Background Art

[0002] As one of the most basic household appliances, the refrigerator is a primary constant-temperature storage device in every household, used to store food and other items that require low temperatures, maintaining continuous cooling and freshness to prevent premature spoilage. In recent years, household refrigerators have gradually become more intelligent, expanding with a variety of specialized smart functions to meet diverse user needs and achieve cooling in different scenarios. The factors that currently influence the effective cooling performance of household refrigerators include not only the refrigerator's own product functions and equipment structure, but also performance changes over time and various equipment problems caused by both human and non-human factors, which can lead to abnormal cooling.

[0003] A common cause of refrigerator refrigeration failure is door opening and closing issues. Years of frequent use and frequent door openings can lead to door misalignment and deformation of the door seal. These issues can cause the door to not close securely, making it difficult for users to detect and leading to a lack of regular maintenance. This door seal leakage impairs cooling performance, causing frequent frosting and increased power consumption. Summary of the Invention

[0004] The present application provides a refrigeration door seal leakage detection system based on the defrost cycle characteristics of a refrigerator, so as to solve the problem that redundant sensors need to be set up for the existing refrigerator refrigeration door seal leakage detection.

[0005] The system comprises:

[0006] a refrigerator data acquisition module configured to acquire operating characteristics of a target refrigerator; the operating characteristics of the target refrigerator include refrigerator compartment characteristics and refrigerator equipment characteristics, and the operating characteristics of the target refrigerator include a cooling leakage detection flag;

[0007] an operating cycle division module, the operating cycle division module being configured to divide the target refrigerator operating characteristics into cycles according to the refrigerator refrigeration door cold leakage characteristic standard and the cold leakage detection mark, each target refrigerator operating characteristic including a plurality of operating cycles, each operating cycle being divided into a first operating cycle and a second operating cycle, the first operating cycle being a cycle in which the refrigerator refrigeration compartment temperature drops, and the second operating cycle being a cycle in which the refrigerator refrigeration compartment temperature rises;

[0008] A refrigerator cooling leakage detection module, wherein the refrigerator cooling leakage detection module is configured to perform cooling leakage detection on the first operating cycle, the second operating cycle, the operating cycle and the refrigerator equipment characteristics within the same operating cycle according to a cooling leakage preset standard; when the first operating cycle, the second operating cycle, the corresponding refrigerator equipment characteristics and the operating cycle in at least one operating cycle of the same refrigerator all meet the cooling leakage preset standard, the corresponding refrigerator will be stored in the detection device list.

[0009] Preferably, the refrigerator data acquisition module includes:

[0010] a data acquisition unit, the data acquisition unit being configured to acquire refrigerator operation data of the refrigerator to be tested through an Internet of Things communication protocol, the refrigerator operation data including refrigerator compartment data and refrigerator device data;

[0011] a data marking unit, the data marking unit being configured to mark the refrigerator device data for cooling leakage detection;

[0012] A data filtering unit is configured to filter the refrigerator compartment data.

[0013] Preferably, the data marking unit is further configured to mark the refrigerator defrost switch record and the refrigerator compressor switch record in the refrigerator operation data with data readable; the cooling leakage detection mark includes a defrost switch mark and a compressor switch mark;

[0014] The data filtering unit is further configured to remove data with abnormal temperature and abnormal values ​​containing missing segments from the refrigerator operation data.

[0015] Preferably, the operation cycle division module includes:

[0016] a first cycle division unit configured to divide the target refrigerator operation characteristic into a first cycle according to the cooling leakage detection mark to obtain a plurality of operation cycles;

[0017] The second cycle division unit is configured to divide the operating cycle into a second cycle according to the cold leakage characteristic standard of the refrigerator refrigeration door, and obtain a plurality of the first operating cycles and the second operating cycles, and the first operating cycle and the second operating cycle respectively correspond to the operating cycle one by one.

[0018] Preferably, the second period division includes:

[0019] dividing a first time range before the operation period into the first operation period;

[0020] divide the second time range after the running period into the second running period.

[0021] Preferably, the refrigerator cold leakage detection module comprises:

[0022] a cold leakage judgment unit, configured to perform cold leakage detection on the first running period, the second running period, the running period and the refrigerator equipment characteristics in the same running period according to the cold leakage preset standard;

[0023] a detection registration unit, configured to store the refrigerator meeting the cold leakage preset standard into a detection equipment list.

[0024] Preferably, the cold leakage judgment unit comprises:

[0025] a first judgment unit, configured to perform cold leakage detection according to the first running period and the second running period, and generate first detection feedback information when the first running period and the second running period meet the cold leakage preset standard;

[0026] a second judgment unit, configured to perform cold leakage detection according to the running period when the first detection feedback information is received, and generate second detection feedback information when the running period meets the cold leakage preset standard;

[0027] a third judgment unit, configured to perform cold leakage detection according to the refrigerator equipment characteristics when the second detection feedback information is received, and generate third detection feedback information when the refrigerator equipment characteristics meet the cold leakage preset standard;

[0028] the detection registration unit is configured to store the refrigerator meeting the cold leakage preset standard into a detection equipment list when the third detection feedback information is received.

[0029] Preferably, the first judgment unit is further configured to:

[0030] determine whether the ratio of the cold storage compartment temperature drop stage in the first running period to the overall stage of the first running period is greater than a first preset value, and whether the ratio of the cold storage compartment temperature rise stage in the second running period to the overall stage of the second running period is greater than a second preset value;

[0031] if yes, the first detection feedback information is generated;

[0032] if no, the running period is reselected.

[0033] Preferably, the second judgment unit is further configured to:

[0034] determining whether a ratio of a freezing chamber temperature drop stage in the operation cycle to the whole stage of the operation cycle is greater than a third preset value, and a ratio of a stage in which a difference between a refrigerating chamber temperature and a refrigerating set temperature in the operation cycle is greater than a fourth preset value to the whole of the operation cycle is greater than a fifth preset value;

[0035] if yes, generating the second detected feedback information;

[0036] if no, reselecting an operation cycle.

[0037] Preferably, the third determination unit is further configured to:

[0038] determining whether a compressor switch number in the refrigerator equipment feature is greater than a sixth preset value and less than a seventh preset value;

[0039] if yes, generating the third detected feedback information;

[0040] if no, reselecting an operation cycle.

[0041] From the above, the present application provides a refrigerating door leakage detection system based on a defrosting cycle feature of a refrigerator, which comprises a refrigerator data acquisition module configured to acquire a target refrigerator operation feature; the target refrigerator operation feature comprises a refrigerator compartment feature and a refrigerator equipment feature, and has a leakage detection mark; an operation cycle division module configured to divide the target refrigerator operation feature according to a refrigerating door leakage feature standard of the refrigerator and the leakage detection mark; each target refrigerator operation feature comprises a plurality of operation cycles, each operation cycle is divided into a first operation cycle and a second operation cycle, the first operation cycle is a cycle in which a refrigerating chamber temperature of the refrigerator drops, and the second operation cycle is a cycle in which the refrigerating chamber temperature of the refrigerator rises; and a refrigerator leakage detection module configured to detect leakage according to a leakage preset standard for the first operation cycle, the second operation cycle, the operation cycle and the refrigerator equipment feature in the same operation cycle; when the first operation cycle, the second operation cycle, the corresponding refrigerator equipment feature and the operation cycle in at least one operation cycle of the same refrigerator all meet the leakage preset standard, the corresponding refrigerator is stored in a detected equipment list. The present application solves the problem of the need to set extra sensors for leakage detection of a refrigerating door of a refrigerator by using the above system. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0043] Figure 1 A schematic diagram of a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application;

[0044] Figure 2 A schematic diagram of a refrigerator data acquisition module in a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application;

[0045] Figure 3 A schematic diagram of a running cycle division module in a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application;

[0046] Figure 4 A schematic diagram of a refrigerator cold leakage detection module in a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application;

[0047] Figure 5 A schematic diagram of a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application;

[0048] Figure 6 A flowchart of a refrigeration door cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0050] It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the following described embodiments, and are not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0051] It should be noted that in the present application, the words such as "exemplary" or "for example" are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific manner.

[0052] As a modern household essential constant temperature storage device, the core function of the refrigerator is to prolong the shelf life of food by continuous refrigeration to prevent food from spoiling prematurely. With the development of Internet of Things technology and smart home, household refrigerators have gradually evolved from basic refrigeration functions to comprehensive preservation devices with multiple intelligent scenarios. However, in actual use, the refrigeration efficiency of the refrigerator is often restricted by various factors, including the design performance of the product itself and the changes in the state of the equipment during long-term use.

[0053] Among the many factors affecting the refrigeration effect of the refrigerator, the door sealing problem is particularly prominent. Because the refrigerator door needs to be opened and closed frequently in daily use, after long-term use, the door hinge may be mechanically worn, and the door seal may lose its elasticity due to material aging. These changes can cause tiny gaps between the door and the box, resulting in cold air leakage that is not easily detected. This sealing failure not only causes a decrease in refrigeration efficiency and an increase in energy consumption, but also causes the evaporator to frost more, further affecting the normal operation of the refrigeration system. Because such problems have progressive characteristics, ordinary users often have difficulty detecting them in a timely manner, so the problems persist and cannot be maintained in a timely manner.

[0054] For refrigerator door sealing detection, there are currently various technical solutions in the industry. One typical solution is to install specific sensing devices on the door and the box, and use changes in physical signals to determine the door seal state. Although this technology can achieve door seal state detection, it has certain limitations in actual application. First, the additional sensing elements increase the manufacturing cost of the product, which is an important consideration factor for the home appliance market that focuses on cost-effectiveness. Second, these sensing devices themselves have a service life problem, and their performance will degrade over time, requiring regular maintenance or replacement to ensure detection accuracy. In addition, this solution usually requires a mounting position to be reserved during product design, which imposes additional requirements on the structure design of the refrigerator. These factors limit the application of this technology in popular household refrigerators to some extent.

[0055] From the user experience perspective, an ideal refrigerator door seal detection solution should have characteristics such as non-invasiveness, low cost, and high reliability. It does not require special user operations, does not significantly increase product prices, and can work stably for a long time without special maintenance. The current market still lacks a solution that fully meets these requirements, providing an innovation space for the development of refrigerator intelligent detection technology.

[0056] Based on the above problems, the present application provides the following embodiments.

[0057] Figure 1 A schematic diagram of a refrigeration door seal cold leakage detection system based on the defrosting cycle characteristics of a refrigerator according to the present application.

[0058] Figure 5 This application is a schematic diagram of a refrigeration door seal leakage detection system based on the refrigerator defrost cycle characteristics.

[0059] See also Figure 1 and Figure 5 It can be seen that this embodiment provides a refrigeration door seal leakage detection system based on the defrost cycle characteristics of the refrigerator, and the system includes:

[0060] The refrigerator data acquisition module 100 is configured to acquire target refrigerator operation characteristics; the target refrigerator operation characteristics include refrigerator compartment characteristics and refrigerator equipment characteristics, and the target refrigerator operation characteristics include a cooling leakage detection mark.

[0061] Specifically, in this embodiment, compared with conventional refrigerator leakage detection technology, it is often necessary to set up multiple refrigerator door switch sensors, which greatly increases the detection cost, and when the sensor fails, leakage detection cannot be continued. Therefore, this embodiment sets the refrigerator data acquisition module 100, and the refrigerator data acquisition module 100 is only used to obtain the target refrigerator operation characteristics, which include refrigerator compartment characteristics and refrigerator equipment characteristics, that is, the refrigerator door switch data is excluded.

[0062] It should be noted that this embodiment uses the compartment temperature and refrigerator equipment data to jointly perform cooling leakage detection, and the refrigerator equipment data is often unreadable data, such as the data of the refrigerator compressor switch. If you want to read such data, you need to mark it, that is, the cooling leakage detection mark, and mark such data as 0 or 1 to facilitate subsequent data reading.

[0063] The system further comprises:

[0064] The operation cycle division module 200 is configured to divide the target refrigerator operation characteristics into cycles according to the refrigerator refrigeration door cold leakage characteristic standard and the cold leakage detection mark. Each of the target refrigerator operation characteristics includes several operation cycles. Each operation cycle is divided into a first operation cycle and a second operation cycle after the cycle division. The first operation cycle is a cycle in which the refrigerator refrigeration chamber temperature drops, and the second operation cycle is a cycle in which the refrigerator refrigeration chamber temperature rises.

[0065] Specifically, in the embodiment, the detection scheme adopted is according to the refrigerator cycle, and the leakage cooling situation cannot be well reflected for a single running cycle, therefore, the running cycle, the first running cycle and the second running cycle are adopted to detect the leakage cooling, wherein the first running cycle and the second running cycle are not sub-periods in the running cycle, but are artificially defined cycles located on both sides of the running cycle obtained by relying on a large number of simulation experiments, and can be understood as that the first running cycle and the second running cycle are prerequisites and follow-ups of the running cycle, and the actual cycle, the cycle prerequisite and the cycle follow-up are used for leakage cooling analysis, so that more accurate leakage cooling situation can be obtained.

[0066] It should be noted that since the leakage cooling does not only occur in the running cycle of the refrigerator, the changes of the internal data of the refrigerator before and after the running cycle need to be considered, and therefore the first running cycle and the second running cycle are set.

[0067] The system further comprises:

[0068] The refrigerator leakage cooling detection module 300 is configured to detect the leakage cooling of the first running cycle, the second running cycle, the running cycle and the refrigerator equipment characteristics in the same running cycle according to the leakage cooling preset standard; when the first running cycle, the second running cycle, the corresponding refrigerator equipment characteristics and the running cycle in at least one running cycle of the same refrigerator all meet the leakage cooling preset standard, the corresponding refrigerator is stored to the detection device list.

[0069] Specifically, in the embodiment, after the data acquisition and cycle division are completed, the leakage cooling detection is performed by the refrigerator leakage cooling detection module 300, wherein the leakage cooling detection includes several steps, which can be regarded as the leakage cooling preset standard, when each step meets the requirements, that is, the data and the cycle meet the leakage cooling preset standard, the refrigerator is identified as a leakage cooling detection success, and can be shipped.

[0070] Figure 2 A schematic view of a refrigerator data acquisition module in a refrigerator leakage cooling detection system based on a defrosting cycle characteristic of a refrigerator according to the present application.

[0071] Referring to Figure 2 It can be known that further, in some embodiments, the refrigerator data acquisition module 100 comprises:

[0072] The data acquisition unit 110 is configured to acquire refrigerator operation data of a refrigerator to be detected through an Internet of Things communication protocol, wherein the refrigerator operation data comprises refrigerator compartment data and refrigerator equipment data.

[0073] The data marking unit 120 is configured to mark the refrigerator equipment data for cold leakage detection.

[0074] The data filtering unit 130 is configured to filter the refrigerator compartment data.

[0075] Specifically, in the present embodiment, the refrigerator data acquisition module 100 is designed as a module composed of the data acquisition unit 110, the data marking unit 120, and the data filtering unit 130, wherein the data acquisition unit 110 is used to directly acquire data generated during the operation of the refrigerator, and subsequent related processing is performed on the data; the data marking unit 120 and the data filtering unit 130 are used to perform related processing on the data acquired by the data acquisition unit 110, and it should be noted that the data types processed by the data marking unit 120 and the data filtering unit 130 are completely different, so the processing processes of the data marking unit 120 and the data filtering unit 130 are performed separately, that is, the data acquisition unit 110 marks the refrigerator equipment data in the refrigerator operation data for cold leakage detection, and the data filtering unit 130 filters the refrigerator compartment data in the refrigerator operation data.

[0076] The data marking unit 120 is further configured to mark the refrigerator defrosting switch record and the refrigerator compressor switch record in the refrigerator operation data for data reading; the cold leakage detection marking comprises defrosting switch marking and compressor switch marking, and specifically, in the present embodiment, the switch of the defrosting and the compressor is one of the necessary data for cold leakage detection, and these data are often in an unreadable state, so the data marking unit 120 marks them as readable data.

[0077] The data filtering unit 130 is further configured to eliminate temperature abnormal data and missing segment abnormal values in the refrigerator operation data, and specifically, in the present embodiment, it can be understood that the data filtering unit 130 eliminates related data that cannot be used as the basis of cold leakage detection data, so as to avoid the problem that the accuracy of cold leakage detection is reduced due to the reference of abnormal data for cold leakage detection.

[0078] Figure 3 A schematic view of a running period division module in a cold leakage detection system for a refrigerator defrosting cycle characteristic of the present application.

[0079] Referring to Figure 3 It can be known that, further, in some embodiments, the running cycle division module 200 comprises:

[0080] The first cycle division unit 210 is configured to divide the target refrigerator running feature according to the leakage detection mark to obtain a plurality of running cycles.

[0081] Specifically, in this embodiment, in the process of cycle division, it is divided into first cycle division and second cycle division. Since the obtained data contains a plurality of running cycles, the first cycle division unit 210 is needed to divide each running cycle, so that the subsequent second cycle division can be performed.

[0082] The running cycle division module 200 further comprises:

[0083] The second cycle division unit 220 is configured to divide the running cycle according to the refrigerator cold storage door leakage feature standard to obtain a plurality of first running cycles and second running cycles, and the first running cycle and the second running cycle correspond to the running cycle one by one.

[0084] Specifically, in this embodiment, after the first cycle division is completed, the second cycle division unit 220 performs the second cycle division according to each running cycle to obtain a plurality of first running cycles and second running cycles, wherein each running cycle has its own first running cycle and second running cycle.

[0085] According to the above introduction of the running cycle, the first running cycle and the second running cycle, it can be known that the second cycle division comprises dividing the first time range before the running cycle into the first running cycle; and dividing the second time range after the running cycle into the second running cycle.

[0086] The first time range and the second time range are determined according to the actual situation, and the specific value is not limited here.

[0087] Figure 4 A schematic view of a refrigerator leakage detection module in a refrigerator leakage detection system based on the defrosting cycle characteristics of the refrigerator.

[0088] Referring to Figure 4 It can be known that, further, in some embodiments, the refrigerator leakage detection module 300 comprises:

[0089] The cold leakage judgment unit 310 is configured to perform cold leakage detection on the first operation period, the second operation period, the operation period and the refrigerator equipment characteristics in the same operation period according to the cold leakage preset standard.

[0090] The detection registration unit 320 is configured to register the refrigerator meeting the cold leakage preset standard in a detection equipment list.

[0091] Specifically, in the embodiment, the cold leakage judgment unit 310 performs cold leakage judgment according to the related data, and the detection registration unit 320 performs detection registration on the refrigerator meeting the cold leakage standard.

[0092] Further, in some embodiments, the cold leakage judgment unit 310 comprises:

[0093] The first judgment unit 311 is configured to perform cold leakage detection according to the first operation period and the second operation period, and generate first detection feedback information when the first operation period and the second operation period meet the cold leakage preset standard.

[0094] Specifically, in the embodiment, the first judgment unit 311 is used to judge whether the ratio of the cold storage temperature drop stage in the first operation period to the whole stage of the first operation period is greater than a first preset value, and whether the ratio of the cold storage temperature rise stage in the second operation period to the whole stage of the second operation period is greater than a second preset value; when the above standard is met, the first detection feedback information is generated; if the above standard is not met, the operation period is reselected.

[0095] The cold leakage judgment unit 310 further comprises:

[0096] The second judgment unit 312 is configured to perform cold leakage detection according to the operation period when the first detection feedback information is received, and generate second detection feedback information when the operation period meets the cold leakage preset standard.

[0097] Specifically, in the embodiment, the second judgment unit 312 is used to judge whether the ratio of the freezer temperature drop stage in the operation period to the whole stage of the operation period is greater than a third preset value, and whether the ratio of the stage in which the difference between the cold storage temperature and the cold storage set temperature in the operation period is greater than a fourth preset value to the whole stage of the operation period is greater than a fifth preset value; if the standard is met, the second detection feedback information is generated; if the standard is not met, the operation period is reselected.

[0098] The cold leakage judgment unit 310 further comprises:

[0099] The third judging unit 313 is configured to perform a cold leakage detection according to the refrigerator equipment characteristics when the second detection feedback information is received, and generate third detection feedback information when the refrigerator equipment characteristics meet the cold leakage preset standard.

[0100] Specifically, in the embodiment, the third judging unit 313 is further configured to judge whether the number of times of switching on the compressor in the refrigerator equipment characteristics is greater than a sixth preset value and less than a seventh preset value; if the above-mentioned standard is met, the third detection feedback information is generated; if the above-mentioned standard is not met, the running period is reselected.

[0101] The detection registration unit 320 is configured to store the refrigerator meeting the cold leakage preset standard to a detection equipment list when the third detection feedback information is received.

[0102] For example, referring to Figure 5 and Figure 6 , the whole process of the system provided in the embodiment is as follows:

[0103] 1. Data acquisition and processing: based on the refrigerator running big data uploaded through the Internet of Things communication protocol, the target range data is acquired. The refrigerator running big data is stored in a cloud platform, including historical data and real-time reported data of various equipment fields of the refrigerator, at least one data is reported per minute, and the target can be analyzed through the time sequence data changes of various temperatures of the refrigerator compartment environment and the state of the refrigerator components.

[0104] 1.1 The data acquisition in the above-mentioned 1 includes the acquisition of time data, specifically the time point of each running data and the corresponding current date; the various compartment temperature data related to the cold leakage characteristics of the refrigerator cold storage door, specifically the compartment temperature and the corresponding user set temperature of the refrigeration compartment, the freezer compartment and the variable temperature compartment, and the refrigerator evaporator temperature; the equipment component state value data related to the cold leakage characteristics of the refrigerator cold storage door, specifically the compressor state value, the defrosting heater state value, and the refrigerator door body switch state value. This part of data acquisition is the original data uploaded by the networked refrigerator, which needs to be processed to make it effective.

[0105] 1.2 The data processing described in 1 above includes frost data marking and refrigerator compressor switch data marking, wherein the marking refers to marking the refrigerator state data into identifiable numerical values. Specifically, in the time series data field, the original identification of the frost heater switch data is converted into numerical values, such as 1 for heater on and 0 for heater off, and the character value of the compressor switch data is converted into numerical values, such as 1 for compressor on and 0 for compressor off, for subsequent processing data to distinguish conditions; including data filtering of data containing temperature anomalies and data containing missing segment abnormal values. Temperature anomaly filtering specifically filters data with chamber temperature less than -50 degrees or greater than 50 degrees, and data with repeated values of chamber temperature or evaporator temperature continuously reported within the target interval. Missing anomaly filtering specifically filters data with data volume less than the current time period minutes between frost opening or closing, to exclude interference caused by abnormal data reporting.

[0106] 2. Door seal cold leakage feature detection: it includes door seal cold leakage feature library, frost cycle processing method, and refrigeration door cold leakage feature detection logic. Through the common cycle data characteristics of multiple examples of refrigerator cold leakage of refrigeration door and the matching detection calculation logic, the refrigeration door cold leakage detection is realized.

[0107] 2.1 The door seal cold leakage feature library described in 2 above is based on expert experience and experimental simulation, and stores the time series characteristics of each dimension data of the refrigerator in the door seal cold leakage state in the big data platform as the reference basis for the cold leakage feature standard and detection processing steps.

[0108] The feature library includes time series data diagnosed by refrigerator experts regularly, and the abnormal interval is recorded as cold leakage feature data; it includes simulation experiments of door bodies with different door gap intervals, and the abnormal time series data generated by them are recorded as cold leakage feature data. Specifically, the refrigeration door cold leakage detection described in the present application takes the cold leakage data state information in the feature library as the reference basis. Among multiple examples of refrigeration door cold leakage anomalies, there are common characteristics, such as Figure 2 For example, it shows the temperature of different compartments of the refrigerator when the refrigeration door is cold leakage, specifically the data range between two defrosting, from top to bottom, the temperature of the refrigeration chamber, the temperature of the variable temperature chamber, and the temperature of the freezer. Due to the influence of refrigerator defrosting, the temperature of the refrigeration chamber in the initial box part rises temporarily, and the temperature of the freezer fluctuates temporarily; except for the box part, the refrigeration chamber temperature shows a rising trend after a falling trend, and the temperature of the variable temperature chamber and the freezer shows a downward trend. The feature library of multiple examples of refrigeration door seal cold leakage is the basis of data processing and calculation logic of the detection method.

[0109] 2.2 The defrost cycle processing method described in 2 above: based on the cold leakage feature library, all defrost markers of a single device within a target time range are obtained, and the data between the defrost closing time and the next defrost opening time is used as a single detection cycle, wherein the on-off signal of the defrost heater marker data is used as the standard of the defrost closing and opening time. Secondly, based on the refrigerator running phenomena of a single defrost cycle in the feature library, the data affected by the defrosting is filtered in the defrost cycle processing, specifically, the running data of the continuous 40 minutes after the defrost closing is filtered.

[0110] 2.3 The cold leakage feature detection described in 2 above is based on the temperature rise and fall ratio of each chamber, and combined with the refrigerator component state data for targeted detection. As shown in the following table, the detection mainly includes the following steps: Figure 3

[0111] Step 1: Traverse each cycle, divide the single detection cycle data into a section and a section based on the cold leakage feature standard in the feature library. Specifically, each cycle is the processed defrost cycle described in 2.2, the a section is the cold storage room falling part of the same cycle, which is set to 40 minutes before the cycle, and the b section is the cold storage room rising part of the same cycle, which is set to the time point of the first hour to the time point of the sixth hour after the a section.

[0112] Step 2: Determine the feature: combined with the overall feature of the cold storage door cold leakage, if the a section time series data cold storage room temperature drop part accounts for more than threshold 1, the a section cold storage room overall drop is greater than threshold 2, and the b section time series data cold storage room temperature rise part accounts for more than threshold 1, then the feature is met. Specifically, threshold 1 is set to 80%, and threshold 2 is set to 1 degree. If not, return to step 1;

[0113] Step 3: Determine the feature: if the current cycle variable temperature chamber temperature data drop part accounts for more than threshold 3, the current cycle freezer temperature drop part accounts for more than threshold 3, and the current cycle cold storage room temperature and cold storage set temperature difference accounts for more than 4 part accounts for more than threshold 3, then the feature is met, specifically, threshold 3 is set to 70%. If not, return to step 1;

[0114] Step 4: Determine the feature: if the data of the current cycle compressor opening state marker accounts for more than threshold 1, and the compressor switch state switches, i.e. the number of marker changes is less than 10 times, then the feature is met, specifically, threshold 1 is set to 80%. If not, return to step 1;

[0115] Step 5: Store the refrigerator equipment that meets the cycle feature to the detected equipment list to realize the detection of the refrigerator cold storage door cold leakage.

[0116] The advantages of the embodiment include:

[0117] ​1. Without additional increase in the cost of sensing equipment, the detection logic is based on the historical operation database of the refrigerator, by obtaining the door seal abnormal data of different refrigerators, analyzing and integrating its operation characteristics, to realize more accurate detection of cold leakage of the refrigeration door; and through the data cleaning and processing process, other interference factors can be filtered, which is beneficial to the acquisition of the door seal cold leakage law.

[0118] 2. The defrosting cycle data reported by the refrigerator in real time is judged by the detection algorithm logic, the characteristics in each effective period are quickly analyzed, and the equipment with cold leakage of the refrigeration door is automatically detected and recorded.

[0119] The above has been described in conjunction with specific embodiments for the sake of convenience. However, the above discussion in some embodiments is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Various modifications and variations are possible in light of the above teachings. The embodiments were chosen and described in order to provide the best explanation for the disclosure and to enable others skilled in the art to best use the embodiments.

Claims

1. A refrigeration door seal leakage detection system based on the refrigerator defrost cycle characteristics, characterized by: The system comprises: A refrigerator data acquisition module (100), the refrigerator data acquisition module (100) being configured to acquire target refrigerator operation characteristics; the target refrigerator operation characteristics comprising refrigerator compartment characteristics and refrigerator equipment characteristics, the target refrigerator operation characteristics including a cooling leakage detection flag; An operation cycle division module (200), the operation cycle division module (200) is configured to divide the target refrigerator operation characteristics into cycles according to the refrigerator refrigeration door cold leakage characteristic standard and the cold leakage detection mark, each target refrigerator operation characteristic includes a plurality of operation cycles, each operation cycle is divided into a first operation cycle and a second operation cycle, the first operation cycle is a cycle in which the refrigerator refrigeration chamber temperature drops, and the second operation cycle is a cycle in which the refrigerator refrigeration chamber temperature rises; A refrigerator cooling leakage detection module (300) is configured to perform cooling leakage detection on the first operating cycle, the second operating cycle, the operating cycle and the refrigerator device characteristics within the same operating cycle according to a cooling leakage preset standard; when the first operating cycle, the second operating cycle, the corresponding refrigerator device characteristics and the operating cycle in at least one operating cycle of the same refrigerator all meet the cooling leakage preset standard, the corresponding refrigerator is stored in a detection device list.

2. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 1 is characterized in that: The refrigerator data acquisition module (100) comprises: A data acquisition unit (110), the data acquisition unit (110) being configured to acquire refrigerator operation data of the refrigerator to be detected through an Internet of Things communication protocol, the refrigerator operation data including refrigerator compartment data and refrigerator equipment data; A data marking unit (120), the data marking unit (120) being configured to mark the refrigerator device data for cooling leakage detection; A data filtering unit (130) is configured to perform data filtering on the refrigerator compartment data.

3. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 2 is characterized in that: The data marking unit (120) is further configured to mark the refrigerator defrost switch record and the refrigerator compressor switch record in the refrigerator operation data with data readable marks; the cold leakage detection mark includes a defrost switch mark and a compressor switch mark; The data filtering unit (130) is further configured to remove data with abnormal temperature and abnormal values ​​containing missing segments from the refrigerator operation data.

4. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 1, characterized in that: The operation cycle division module (200) comprises: a first cycle division unit (210), the first cycle division unit (210) being configured to perform a first cycle division on the target refrigerator operation characteristic according to the cold leakage detection mark, to obtain a plurality of operation cycles; The second cycle division unit (220) is configured to divide the operating cycle into a second cycle according to the cold leakage characteristic standard of the refrigerator refrigeration door, and obtain a plurality of the first operating cycles and the second operating cycles, wherein the first operating cycle and the second operating cycle respectively correspond to the operating cycle one by one.

5. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 4 is characterized in that: The second period division includes: dividing a first time range before the operation period into the first operation period; A second time range after the operation cycle is divided into the second operation cycle.

6. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 1, characterized in that: The refrigerator cooling leakage detection module (300) comprises: A cooling leakage judgment unit (310), the cooling leakage judgment unit (310) being configured to perform cooling leakage detection on the first operating cycle, the second operating cycle, the operating cycle and the refrigerator device characteristics within the same operating cycle according to the cooling leakage preset standard; A detection registration unit (320) is configured to store refrigerators that meet the preset cooling leakage standard in a detection device list.

7. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 6, characterized in that: The cold leakage judgment unit (310) comprises: a first judgment unit (311), the first judgment unit (311) being configured to perform cold leakage detection according to the first operating cycle and the second operating cycle, and to generate first detection feedback information when the first operating cycle and the second operating cycle meet the cold leakage preset standard; a second judgment unit (312), the second judgment unit (312) being configured to, upon receiving the first detection feedback information, perform a cold leakage detection according to the operation cycle, and generate second detection feedback information when the operation cycle meets the cold leakage preset standard; a third judgment unit (313), the third judgment unit (313) being configured to, upon receiving the second detection feedback information, perform cooling leakage detection according to the refrigerator device characteristics, and generate third detection feedback information when the refrigerator device characteristics meet the cooling leakage preset standard; The detection registration unit (320) is configured to store refrigerators that meet the preset cooling leakage standard in the detection device list when receiving the third detection feedback information.

8. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 7, characterized in that: The first judging unit (311) is further configured to: Determining whether a ratio of a refrigerating chamber temperature drop phase in the first operating cycle to an entire phase of the first operating cycle is greater than a first preset value, and whether a ratio of a refrigerating chamber temperature rise phase in the second operating cycle to an entire phase of the second operating cycle is greater than a second preset value; If yes, generating the first detection feedback information; If not, reselect the operation cycle.

9. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 7, characterized in that: The second judgment unit (312) is further configured to: determining whether a ratio of a freezing compartment temperature drop phase during the operating cycle to the entire operating cycle is greater than a third preset value, and a ratio of a phase during the operating cycle during which a difference between the refrigerating compartment temperature and the refrigeration set temperature is greater than a fourth preset value to the entire operating cycle is greater than a fifth preset value; If yes, generating the second detection feedback information; If not, reselect the operation cycle.

10. The refrigeration door seal leakage detection system based on refrigerator defrost cycle characteristics according to claim 7, characterized in that: The third judgment unit (313) is further configured to: Determining whether the number of compressor on-off times in the refrigerator device characteristics is greater than a sixth preset value and less than a seventh preset value; If yes, generating the third detection feedback information; If not, reselect the operation cycle.

Images