Refrigerator and refrigeration effect detection method thereof

Abstract

According to the refrigerator and the refrigeration effect detection method thereof, when all chambers are sequentially refrigerated, tracking judgment is synchronously conducted on changes of a temperature sensing head, when the action of a load and the changes of the temperature sensing head are kept consistent and meet the preset requirement, it is judged that detection is qualified, otherwise, it is judged that the detection is unqualified, and the detection result is reported; the method can reduce the workload of an inspector, solves the problem that the sensor cannot be recognized and is wrongly mounted, can quickly recognize the refrigeration performance of the refrigerator, does not need manual recognition, and improves the recognition accuracy of the refrigeration performance.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a refrigeration effect detection method thereof. Background Art

[0002] Existing refrigerators need to pass on-site inspections before leaving the factory, including load action detection, refrigeration effect detection, etc. The existing on-site inspection process usually uses dynamic detection to conduct rapid inspections, starting each load in a fixed order, and then cooling each compartment in turn. Probes are placed in each compartment of the refrigerator to detect the temperature drop in the compartment, and finally the temperature of each probe is used to determine whether it is qualified. There are two problems with the current detection method. First, when the sensor of the compartment is installed out of place, the problem cannot be found in a short period of refrigeration, but the problem can only be exposed in the subsequent long-term operation; second, whether the current inspection is qualified needs to be determined manually on the detector, which is more dependent on the experience of the inspector, requires a lot of manpower, and is prone to misjudgment. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a refrigerator and a refrigeration effect detection method thereof, which solves the problem of being unable to identify the wrong installation of the sensor, can quickly identify the refrigeration performance of the refrigerator without manual identification, and improves the accuracy of refrigeration performance identification.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber;

[0006] A door, used for opening and closing the storage room;

[0007] A freezing temperature sensor, disposed in the freezing chamber, for detecting the temperature of the freezing chamber;

[0008] A refrigeration temperature sensor is disposed in the refrigeration chamber and is used to detect the temperature of the refrigeration chamber;

[0009] A refrigeration damper is arranged in the air duct of the refrigerator, and when the refrigeration damper is opened, cold air is delivered to the refrigeration chamber through the refrigeration damper, and when the refrigeration damper is closed, cold air cannot be delivered to the refrigeration chamber;

[0010] The controller is configured as:

[0011] In response to a freezing single refrigeration instruction, the refrigeration damper is closed, and the freezing initial temperature detected by the freezing temperature sensor and the refrigeration initial temperature detected by the refrigeration temperature sensor are acquired;

[0012] After a first time period, obtaining the real-time freezing temperature detected by the freezing temperature sensor and the real-time refrigeration temperature detected by the refrigeration temperature sensor;

[0013] Calculating a freezing temperature drop rate according to the freezing initial temperature and the freezing real-time temperature, and calculating a refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature;

[0014] When the freezing temperature reduction rate does not meet the preset freezing refrigeration rate requirement or the refrigeration temperature difference is greater than a preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is unqualified.

[0015] As an improvement of the above solution, the controller is further configured as follows:

[0016] When the freezing temperature reduction rate meets the preset freezing refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is qualified.

[0017] As an improvement of the above solution, after determining that the first refrigeration stage of the refrigerator is qualified, the controller is further configured to:

[0018] In response to a refrigeration and freezing simultaneous cooling instruction, opening the refrigeration damper;

[0019] acquiring a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and acquiring a second refrigeration temperature detected by the refrigeration temperature sensor after a second time period;

[0020] Calculating a refrigeration cooling rate according to the first refrigeration temperature and the second refrigeration temperature;

[0021] When the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be unqualified; when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be qualified.

[0022] As an improvement of the above solution, the refrigerator further includes:

[0023] An ambient temperature sensor is disposed outside the box and is used to detect the ambient temperature of the environment in which the refrigerator is located;

[0024] Then, after responding to the freezing and cooling alone instruction, the controller is further configured to:

[0025] The ambient temperature detected by the ambient temperature sensor is obtained, a target speed of a corresponding compressor is queried according to the ambient temperature, and the operation of the compressor is controlled according to the target speed.

[0026] As an improvement of the above solution, the controller is further configured as follows:

[0027] After determining that the first refrigeration stage of the refrigerator is unqualified, refrigeration failure information is reported.

[0028] To achieve the above object, an embodiment of the present invention further provides a method for detecting a refrigeration effect of a refrigerator, comprising:

[0029] In response to the freezing and cooling alone instruction, the refrigeration damper is closed, and the freezing initial temperature of the freezing chamber and the refrigeration initial temperature of the refrigeration chamber are acquired;

[0030] After a first time period, obtaining the real-time freezing temperature of the freezing chamber and the real-time refrigerating temperature of the refrigerating chamber;

[0031] Calculating a freezing temperature drop rate according to the freezing initial temperature and the freezing real-time temperature, and calculating a refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature;

[0032] When the freezing temperature reduction rate does not meet the preset freezing refrigeration rate requirement or the refrigeration temperature difference is greater than a preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is unqualified.

[0033] As an improvement of the above solution, the method further includes:

[0034] When the freezing temperature reduction rate meets the preset freezing refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is qualified.

[0035] As an improvement of the above solution, after determining that the first refrigeration stage of the refrigerator is qualified, the method further includes:

[0036] In response to a refrigeration and freezing simultaneous cooling instruction, opening the refrigeration damper;

[0037] acquiring a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and acquiring a second refrigeration temperature detected by the refrigeration temperature sensor after a second time period;

[0038] Calculating a refrigeration cooling rate according to the first refrigeration temperature and the second refrigeration temperature;

[0039] When the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be unqualified; when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be qualified.

[0040] As an improvement of the above solution, the refrigerator further includes:

[0041] An ambient temperature sensor is disposed outside the box and is used to detect the ambient temperature of the environment in which the refrigerator is located;

[0042] Then, after responding to the freezing and cooling alone instruction, the method further includes:

[0043] The ambient temperature detected by the ambient temperature sensor is obtained, a target speed of a corresponding compressor is queried according to the ambient temperature, and the operation of the compressor is controlled according to the target speed.

[0044] As an improvement of the above solution, the method further includes:

[0045] After determining that the first refrigeration stage of the refrigerator is unqualified, refrigeration failure information is reported.

[0046] The refrigerator and the refrigeration effect detection method thereof disclosed in the present invention can simultaneously track and judge the changes of the temperature sensing head when refrigerating each compartment in turn. When the action of the load is consistent with the change of the temperature sensing head and reaches the preset requirements, it is judged as qualified. Otherwise, it is judged as unqualified and the detection result is reported, which can reduce the workload of the inspector, solve the problem of being unable to identify the wrong installation of the sensor, can quickly identify the refrigeration performance of the refrigerator without manual identification, and improve the accuracy of refrigeration performance identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0049] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0050] Figure 4 is a schematic diagram of the connection between the controller and other hardware devices provided by an embodiment of the present invention;

[0051] Figure 5 Schematic diagram of the installation positions of the refrigeration temperature sensor and the freezing temperature sensor provided in the embodiment of the present invention;

[0052] Figure 6 is a first working flow diagram of a controller provided by an embodiment of the present invention;

[0053] Figure 7 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0054] Figure 8 is a third working flow diagram of the controller provided in an embodiment of the present invention;

[0055] Fig. 9 is a fourth working flow diagram of the controller provided by an embodiment of the present invention;

[0056] Fig.10 The present invention provides a flowchart of a refrigerator refrigeration effect detection method.

[0057] Among them, 100, refrigerator; 1, compressor; 2, evaporator; 3, capillary; 4, condenser; 11, cold storage room; 12, freezer room; S1, cold storage temperature sensor; S2, freezer temperature sensor; S3, ambient temperature sensor; 5, damper. DETAILED DESCRIPTION

[0058] 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.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] See also Figure 1 , Figure 11 is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body defining a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0063] See also Figure 2 , Figure 2 1 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as a refrigerating room 11 and a freezing room 12 according to different uses. They can also include a temperature-changing room, a vacuum drawer, a moisturizing drawer, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The upper storage room is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0064] See also Figure 3 , Figure 3The schematic diagram of the structure of the refrigeration system in the refrigerator provided by the embodiment of the present invention, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. The compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0065] See also Figure 4 , Figure 4 : is a schematic diagram of the connection between the controller and other hardware devices provided in an embodiment of the present invention. The refrigerator according to the embodiment of the present invention includes:

[0066] A refrigeration temperature sensor S1 is provided in the refrigeration chamber 11 and is used to detect the temperature of the refrigeration chamber 11;

[0067] A freezing temperature sensor S2 is provided in the freezing chamber 12 and is used to detect the temperature of the freezing chamber 12;

[0068] An ambient temperature sensor S3 is provided outside the box and is used to detect the ambient temperature of the environment in which the refrigerator is located;

[0069] The refrigeration damper 5 is arranged in the air duct of the refrigerator. When the refrigeration damper 5 is opened, cold air is transported to the refrigeration chamber 11 through the refrigeration damper 5 .

[0070] In the embodiment of the present invention, the detection values ​​of the refrigeration temperature sensor S1, the freezing temperature sensor S2 and the ambient temperature sensor S3 are obtained by the controller in the refrigerator; the opening and closing of the refrigeration damper 5 are controlled by the controller, and when the refrigeration damper 5 is opened, the opening angle of the refrigeration damper 5 is controlled.

[0071] See also Figure 5 , Figure 5 It is a schematic diagram of the installation position of the refrigeration temperature sensor and the freezing temperature sensor provided by the embodiment of the present invention, with the refrigeration chamber 11 on the top and the freezing chamber 12 on the bottom, S1 is the refrigeration temperature sensor arranged in the refrigeration chamber 11, and S2 is the freezing temperature sensor arranged in the freezing chamber 12. When the refrigerator is powered on and enters the dynamic detection, the compressor and the fan are first forced to start, and the refrigeration damper is closed to allow the freezing chamber to refrigerate alone. At this time, the temperature of the freezing chamber will drop. After the preset time is up, the refrigeration damper is opened again to allow the cold air to be sent to the refrigeration chamber. At this time, the temperature of the refrigeration chamber will drop. However, if there is a problem with the crimping of the internal wires, or the on-site wiring causes the positions of S1 and S2 to be reversed, that is, S1 is the temperature sensor of the refrigeration chamber and is placed in the freezing chamber, and S2 is the temperature sensor of the freezing chamber and is placed in the refrigeration chamber, because the temperatures of the two chambers are relatively low after power-on, when the freezing chamber is refrigerated first, the compressor and the fan are forced to start, so the cold air will inevitably blow to the freezing chamber, and the refrigeration state of this refrigerator is normal. However, after a long period of refrigeration, because S1 and S2 are reversed, the temperature of the refrigerator compartment is inevitably not reached, but the temperature sensor senses the temperature of the freezer compartment, which leads to abnormal refrigeration of the refrigerator compartment. The freezer compartment will also be refrigerated all the time due to the confusion of the temperature sensor. It is actually impossible to inspect every incoming wire for internal wiring. Wiring errors often occur at the production site. The wrong installation of the temperature sensor cannot be detected by existing detection methods, but by cooperating with software methods, it can be found out in a shorter time. Especially for multi-system refrigerators, such as refrigerators with refrigeration, freezing, and variable temperature zones, the freezer compartment and the variable temperature zone often have wrong installation wires. From the on-site curve, it cannot be seen within 1 hour of power-on, and the abnormality must be discovered after at least a few hours of power-on. Therefore, the present invention proposes a method for detecting the refrigeration effect of a refrigerator, which can improve the accuracy of production detection and improve detection efficiency.

[0072] Specifically, the controller is configured to: in response to a freezing single refrigeration instruction, close the refrigeration damper, and obtain the freezing initial temperature detected by the freezing temperature sensor and the refrigeration initial temperature detected by the refrigeration temperature sensor; obtain the freezing real-time temperature detected by the freezing temperature sensor and the refrigeration real-time temperature detected by the refrigeration temperature sensor after a first time period; calculate the freezing cooling rate according to the freezing initial temperature and the freezing real-time temperature, and calculate the refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature; when the freezing cooling rate does not meet the preset freezing refrigeration rate requirement or the refrigeration temperature difference is greater than the preset temperature difference threshold, determine that the first refrigeration stage of the refrigerator is unqualified; when the freezing cooling rate meets the preset freezing refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, determine that the first refrigeration stage of the refrigerator is qualified.

[0073] For example, see Figure 6 , Figure 6 It is the first working flow chart of the controller provided by the embodiment of the present invention, and the controller is configured to execute steps S11 to S23. After detecting that the refrigerator is powered on, the detection is started, and the freezing and refrigeration are forced first. At this time, the refrigeration damper needs to be closed (the wind generated by the evaporator heat exchange will not enter the refrigeration chamber through the refrigeration damper), and the compressor is controlled to run. After refrigeration for n minutes (the value range of n is 3 to 10), the initial freezing temperature Tf0 detected by the freezing temperature sensor and the initial refrigeration temperature Tr0 detected by the refrigeration temperature sensor are obtained. After an interval of the first time period, the real-time freezing temperature Tf1 detected by the freezing temperature sensor and the real-time refrigeration temperature Tr1 detected by the refrigeration temperature sensor are obtained again. The first time period can be determined by the staff according to the experience value, and is not specifically limited here. Then, the freezing cooling rate is calculated according to the initial freezing temperature Tf0, the real-time freezing temperature Tf1 and the first time period (first calculate |Tf0-Tf1|, and then calculate the ratio of this absolute value to the first time period), and the absolute value of the refrigeration temperature difference between the real-time refrigeration temperature Tr1 and the initial refrigeration temperature Tr0 is calculated (it is necessary to ensure that the doors of the refrigeration room and the freezer room are not opened at this stage to prevent outside air from affecting the temperature of the compartments).

[0074] In the embodiment of the present invention, the freezing and refrigeration rate requirement is: the freezing and cooling rate is greater than the preset freezing rate threshold, and the freezing rate threshold can be selected by the staff according to the experience value, and is not specifically limited here. When the freezing and cooling rate does not meet the preset freezing and refrigeration rate requirement, it means that the cooling rate is too slow at this time, and the first refrigeration stage of the refrigerator is judged to be unqualified; or, since the refrigeration damper is in a closed state at this time, the temperature of the refrigerator should remain basically unchanged (even if there is a change, the temperature difference should be very small), therefore, when the absolute value of the refrigeration temperature difference is greater than the preset temperature difference threshold, the first refrigeration stage of the refrigerator is judged to be unqualified. Exemplarily, the value range of the temperature difference threshold is 0 to 2°C, and this value range is only an example. In actual application, it can be selected according to the environment in which the refrigerator is located, and is not specifically limited here. On the contrary, when the freezing and cooling rate meets the preset freezing and refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, the first refrigeration stage of the refrigerator is judged to be qualified.

[0075] In the above embodiment, since only the cooling rate of the freezer compartment is evaluated for the refrigeration effect, in actual application, the refrigerator compartment also needs to be refrigerated. Therefore, an embodiment of the present invention also provides a refrigeration effect evaluation combined with blowing air in the refrigerator compartment.

[0076] Specifically, after determining that the first refrigeration stage of the refrigerator is qualified, the controller is further configured to: open the refrigeration damper in response to a simultaneous refrigeration and freezing instruction; obtain a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and obtain a second refrigeration temperature detected by the refrigeration temperature sensor after an interval of a second time period; calculate a refrigeration cooling rate based on the first refrigeration temperature and the second refrigeration temperature; when the refrigeration cooling rate does not meet the preset refrigeration and cooling rate requirement, determine that the second refrigeration stage of the refrigerator is unqualified; when the refrigeration cooling rate meets the preset refrigeration and cooling rate requirement, determine that the second refrigeration stage of the refrigerator is qualified.

[0077] For example, see Figure 7 , Figure 7 It is the second working flow chart of the controller provided by an embodiment of the present invention. After executing step S23, the controller is also used to execute steps S24 to S32. After the first refrigeration stage is determined to be qualified, when the refrigeration and freezing and refrigeration instructions are received, the refrigeration damper is opened to allow the cold air generated after the heat exchange of the evaporator to flow into the refrigeration chamber to cool the refrigeration chamber. It can be understood that the compressor operates normally during this process. After the refrigeration damper is opened, the first refrigeration temperature Tra detected by the refrigeration temperature sensor is obtained, and the second refrigeration temperature Trb detected by the refrigeration temperature sensor is obtained after the second time period; the second time period can be determined by the staff according to the experience value, and is not specifically limited here. The refrigeration cooling rate is calculated according to the first refrigeration temperature Tra and the second refrigeration temperature Trb (first calculate |Tra-Trb|, and then calculate the ratio of this absolute value to the second time period); when the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be unqualified; conversely, when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be qualified.

[0078] Specifically, the controller is further configured to: report refrigeration failure information after determining that the first refrigeration stage of the refrigerator is unqualified or after determining that the second refrigeration stage of the refrigerator is unqualified.

[0079] For example, see Figure 8 , Figure 8It is the third working flow chart of the controller provided in an embodiment of the present invention, and the controller is also used to execute steps S101 to S102. The refrigeration fault information can be uploaded through a communication module provided in the refrigerator, and the communication module reports the refrigeration fault information to the client of the staff, and the client can synchronously collect the refrigeration stage detection results of all refrigerators in the production line. Alternatively, the prompt information of the refrigeration fault information can be displayed on the display screen of the refrigerator (provided outside the door), and the prompt information includes text prompts, light prompts, etc. After learning of this refrigeration fault information, the production line staff will promptly troubleshoot the refrigerator to confirm whether the temperature sensor in the refrigerator or freezer is installed incorrectly.

[0080] Specifically, the refrigerator also includes: an ambient temperature sensor, which is arranged outside the box body and is used to detect the ambient temperature of the environment in which the refrigerator is located; then, after responding to the freezing and cooling instructions, the controller is also configured to: obtain the ambient temperature detected by the ambient temperature sensor, query the target speed of the corresponding compressor according to the ambient temperature, and control the operation of the compressor according to the target speed.

[0081] For example, see Fig. 9 , Fig. 9 This is the fourth work flow chart of the controller provided by an embodiment of the present invention. After executing step S11, the controller is further configured to execute steps S201 to S203. When refrigeration is required, the ambient temperature detected by the ambient temperature sensor is first obtained. The database of the refrigerator pre-stores the correspondence between the compressor speed value and several ambient temperature intervals. The corresponding target speed can be found in the several ambient temperature intervals according to the compressor speed obtained in real time, and the operation of the compressor can be controlled according to the target speed. It is worth noting that the values ​​of the ambient temperature interval and the compressor speed can be set according to experience, and no specific limitation is made here.

[0082] In the embodiment of the present invention, when each compartment is refrigerated in turn, the changes of the temperature sensors (refrigeration temperature sensor and freezing temperature sensor) are also tracked and judged synchronously. When the action of the load is consistent with the change of the temperature sensor and meets the preset requirements, it is judged as qualified, otherwise it is judged as unqualified, and the test results are reported, which can reduce the workload of the inspector, solve the problem of being unable to identify the wrong installation of the sensor, and can quickly identify the refrigeration performance of the refrigerator without manual identification, and improve the accuracy of refrigeration performance identification.

[0083] See also Fig.10 , Fig.10The present invention provides a flowchart of a refrigerator refrigeration effect detection method provided by an embodiment of the present invention, wherein the refrigerator comprises a refrigeration damper, a freezing temperature sensor and a refrigeration temperature sensor; the refrigeration damper is arranged in the air duct of the refrigerator, and when the refrigeration damper is opened, cold air is delivered to the refrigeration chamber through the refrigeration damper; the freezing temperature sensor is arranged in the refrigeration chamber, and is used to detect the temperature of the refrigeration chamber; the refrigeration temperature sensor is arranged in the refrigeration chamber, and is used to detect the temperature of the refrigeration chamber; then, the refrigerator refrigeration effect detection method comprises:

[0084] S1, in response to a freezing and cooling command, closing the refrigeration damper, and obtaining the initial freezing temperature of the freezing chamber and the initial refrigeration temperature of the refrigeration chamber;

[0085] S2, obtaining the real-time freezing temperature of the freezing chamber and the real-time refrigerating temperature of the refrigerating chamber after a first time period;

[0086] S3, calculating the freezing temperature drop rate according to the freezing initial temperature and the freezing real-time temperature, and calculating the refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature;

[0087] S4: When the freezing and cooling rate does not meet the preset freezing and refrigeration rate requirement or the refrigeration temperature difference is greater than the preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is unqualified.

[0088] Specifically, the method further includes: when the freezing and cooling rate meets the preset freezing and refrigeration rate requirement and the refrigeration temperature difference is greater than a preset temperature difference threshold, determining that the first refrigeration stage of the refrigerator is qualified.

[0089] Exemplarily, after detecting that the refrigerator is powered on, the detection is started, and the freezing and refrigeration are forced first. At this time, the refrigeration damper needs to be closed (the wind generated by the evaporator heat exchange will not enter the refrigeration chamber through the refrigeration damper), and the compressor is controlled to run. After refrigeration for n minutes (n ranges from 3 to 10), the initial freezing temperature Tf0 detected by the freezing temperature sensor and the initial refrigeration temperature Tr0 detected by the refrigeration temperature sensor are obtained. After an interval of a first time period, the real-time freezing temperature Tf1 detected by the freezing temperature sensor and the real-time refrigeration temperature Tr1 detected by the refrigeration temperature sensor are obtained again. The first time period can be determined by the staff according to empirical values, and is not specifically limited here. Then, the freezing cooling rate is calculated according to the initial freezing temperature Tf0, the real-time freezing temperature Tf1 and the first time period (first calculate |Tf0-Tf1|, and then calculate the ratio of this absolute value to the first time period), and the absolute value of the refrigeration temperature difference between the real-time refrigeration temperature Tr1 and the initial refrigeration temperature Tr0 is calculated (it is necessary to ensure that the doors of the refrigeration room and the freezer room are not opened at this stage to prevent outside air from affecting the temperature of the compartments).

[0090] In the embodiment of the present invention, the freezing and refrigeration rate requirement is: the freezing and cooling rate is greater than the preset freezing rate threshold, and the freezing rate threshold can be selected by the staff according to the experience value, and is not specifically limited here. When the freezing and cooling rate does not meet the preset freezing and refrigeration rate requirement, it means that the cooling rate is too slow at this time, and the first refrigeration stage of the refrigerator is judged to be unqualified; or, since the refrigeration damper is in a closed state at this time, the temperature of the refrigerator should remain basically unchanged (even if there is a change, the temperature difference should be very small), therefore, when the absolute value of the refrigeration temperature difference is greater than the preset temperature difference threshold, the first refrigeration stage of the refrigerator is judged to be unqualified. Exemplarily, the value range of the temperature difference threshold is 0 to 2°C, and this value range is only an example. In actual application, it can be selected according to the environment in which the refrigerator is located, and is not specifically limited here. On the contrary, when the freezing and cooling rate meets the preset freezing and refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, the first refrigeration stage of the refrigerator is judged to be qualified.

[0091] Specifically, after determining that the first refrigeration stage of the refrigerator is qualified, the method also includes: opening the refrigeration damper in response to a simultaneous refrigeration and freezing instruction; obtaining a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and obtaining a second refrigeration temperature detected by the refrigeration temperature sensor after an interval of a second time period; calculating a refrigeration cooling rate according to the first refrigeration temperature and the second refrigeration temperature; when the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, determining that the second refrigeration stage of the refrigerator is unqualified; when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, determining that the second refrigeration stage of the refrigerator is qualified.

[0092] Exemplarily, after the first refrigeration stage is determined to be qualified, when the refrigeration and freezing and refrigeration instructions are received, the refrigeration damper is opened so that the cold air generated after the evaporator heat exchange flows into the refrigeration chamber to cool the refrigeration chamber. It can be understood that the compressor operates normally during this process. After the refrigeration damper is opened, the first refrigeration temperature Tra detected by the refrigeration temperature sensor is obtained, and the second refrigeration temperature Trb detected by the refrigeration temperature sensor is obtained after the second time period; the second time period can be taken by the staff according to the experience value, and is not specifically limited here. The refrigeration cooling rate is calculated according to the first refrigeration temperature Tra and the second refrigeration temperature Trb (first calculate |Tra-Trb|, and then calculate the ratio of this absolute value to the second time period); when the refrigeration cooling rate does not meet the preset refrigeration and cooling rate requirements, the second refrigeration stage of the refrigerator is determined to be unqualified; conversely, when the refrigeration cooling rate meets the preset refrigeration and cooling rate requirements, the second refrigeration stage of the refrigerator is determined to be qualified.

[0093] Specifically, the refrigerator also includes: an ambient temperature sensor, which is arranged outside the box body and is used to detect the ambient temperature of the environment in which the refrigerator is located; then, after responding to the freezing and cooling instructions, the method also includes: obtaining the ambient temperature detected by the ambient temperature sensor, querying the target speed of the corresponding compressor according to the ambient temperature, and controlling the operation of the compressor according to the target speed.

[0094] For example, when refrigeration is needed, the ambient temperature detected by the ambient temperature sensor is first obtained. The database of the refrigerator pre-stores the correspondence between the compressor speed value and several ambient temperature intervals. The corresponding target speed can be found in the several ambient temperature intervals according to the compressor speed obtained in real time, and the operation of the compressor is controlled according to the target speed. It is worth noting that the values ​​of the ambient temperature interval and the compressor speed can be set according to experience, and no specific limitation is made here.

[0095] Specifically, the method further includes: reporting refrigeration failure information after determining that the first refrigeration stage of the refrigerator is unqualified or after determining that the second refrigeration stage of the refrigerator is unqualified.

[0096] Exemplarily, the refrigeration fault information can be uploaded through a communication module provided in the refrigerator, and the communication module reports the refrigeration fault information to the client of the staff, and the client can synchronously collect the refrigeration stage detection results of all refrigerators in the production line. Alternatively, the prompt information of the refrigeration fault information can be displayed on the display screen of the refrigerator (provided outside the door), and the prompt information includes text prompts, light prompts, etc. After the production line staff learns of the refrigeration fault information, they will promptly troubleshoot the refrigerator to confirm whether the temperature sensor of the refrigerator or freezer is installed incorrectly.

[0097] In the embodiment of the present invention, when each compartment is refrigerated in turn, the changes of the temperature sensors (refrigeration temperature sensor and freezing temperature sensor) are also tracked and judged synchronously. When the action of the load is consistent with the change of the temperature sensor and meets the preset requirements, it is judged as qualified, otherwise it is judged as unqualified, and the test results are reported, which can reduce the workload of the inspector, solve the problem of being unable to identify the wrong installation of the sensor, and can quickly identify the refrigeration performance of the refrigerator without manual identification, and improve the accuracy of refrigeration performance identification.

[0098] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber; A door, used for opening and closing the storage chamber; A freezing temperature sensor, disposed in the freezing chamber, for detecting the temperature of the freezing chamber; A refrigeration temperature sensor is disposed in the refrigeration chamber and is used to detect the temperature of the refrigeration chamber; A refrigeration damper is arranged in the air duct of the refrigerator, and when the refrigeration damper is opened, cold air is delivered to the refrigeration chamber through the refrigeration damper, and when the refrigeration damper is closed, cold air cannot be delivered to the refrigeration chamber; The controller is configured as: In response to a freezing single refrigeration instruction, the refrigeration damper is closed, and the freezing initial temperature detected by the freezing temperature sensor and the refrigeration initial temperature detected by the refrigeration temperature sensor are acquired; After a first time period, obtaining the real-time freezing temperature detected by the freezing temperature sensor and the real-time refrigeration temperature detected by the refrigeration temperature sensor; Calculating a freezing temperature drop rate according to the freezing initial temperature and the freezing real-time temperature, and calculating a refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature; When the freezing temperature reduction rate does not meet the preset freezing refrigeration rate requirement or the refrigeration temperature difference is greater than a preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is unqualified.

2. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the freezing temperature reduction rate meets the preset freezing refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is qualified.

3. The refrigerator according to claim 2, characterized in that: After determining that the first refrigeration stage of the refrigerator is qualified, the controller is further configured to: In response to a refrigeration and freezing simultaneous cooling instruction, opening the refrigeration damper; acquiring a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and acquiring a second refrigeration temperature detected by the refrigeration temperature sensor after a second time period; Calculating a refrigeration cooling rate according to the first refrigeration temperature and the second refrigeration temperature; When the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be unqualified; when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be qualified.

4. The refrigerator according to claim 1, characterized in that: The controller is also configured to: After determining that the first refrigeration stage of the refrigerator is unqualified, refrigeration failure information is reported.

5. A cooling effect detection method, characterized in that: include: In response to the freezing and cooling alone instruction, the refrigeration damper is closed, and the freezing initial temperature of the freezing chamber and the refrigeration initial temperature of the refrigeration chamber are acquired; After a first time period, obtaining the real-time freezing temperature of the freezing chamber and the real-time refrigerating temperature of the refrigerating chamber; Calculating a freezing temperature drop rate according to the freezing initial temperature and the freezing real-time temperature, and calculating a refrigeration temperature difference between the refrigeration real-time temperature and the refrigeration initial temperature; When the freezing temperature reduction rate does not meet the preset freezing refrigeration rate requirement or the refrigeration temperature difference is greater than a preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is unqualified.

6. The method for detecting the refrigeration effect of a refrigerator according to claim 5, characterized in that: The method further comprises: When the freezing temperature reduction rate meets the preset freezing refrigeration rate requirement and the refrigeration temperature difference is greater than the preset temperature difference threshold, it is determined that the first refrigeration stage of the refrigerator is qualified.

7. The method for detecting the refrigeration effect of a refrigerator according to claim 5, characterized in that: After determining that the first refrigeration stage of the refrigerator is qualified, the method further includes: In response to a refrigeration and freezing simultaneous cooling instruction, opening the refrigeration damper; acquiring a first refrigeration temperature detected by the refrigeration temperature sensor when the refrigeration damper is opened, and acquiring a second refrigeration temperature detected by the refrigeration temperature sensor after a second time period; Calculating a refrigeration cooling rate according to the first refrigeration temperature and the second refrigeration temperature; When the refrigeration cooling rate does not meet the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be unqualified; when the refrigeration cooling rate meets the preset refrigeration cooling rate requirement, the second refrigeration stage of the refrigerator is determined to be qualified.

8. The method for detecting the refrigeration effect of a refrigerator according to claim 5, characterized in that: The method further comprises: After determining that the first refrigeration stage of the refrigerator is unqualified, refrigeration failure information is reported.

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