Refrigerator with automatic defrosting function

Abstract

The invention relates to the technical field of refrigeration equipment, in particular to a refrigerator with an automatic defrosting function, the refrigerator comprises a refrigerator body shell layer, an inner container storage layer and a heat preservation layer, the inner container storage layer is fixedly arranged in the refrigerator body shell layer, and the heat preservation layer is further arranged between the inner wall of the refrigerator body shell layer and the outer side of the inner container storage layer; an automatic defrosting control module is further arranged in the refrigerator, and the automatic defrosting control module judges whether defrosting conditions are met or not through multi-sensor data fusion. After defrosting is triggered, the air outlet angle and the hot air temperature are dynamically calculated and controlled according to the area temperature and the frosting state fed back by the sensor. Through rotation and reciprocating movement of the air outlet pipe and the design of the multi-angle air blowing openings, the limitation of traditional fixed air outlet is broken through, mixing of cold air and hot air is accelerated, the defrosting time is greatly shortened, frost layers at dead corners can be removed, and the problem that traditional defrosting is not thorough is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a refrigerator with automatic defrosting function. BACKGROUND

[0002] The existing refrigerator adopts a fixed direction air outlet defrosting mode, the air outlet angle and range are limited, resulting in low mixing efficiency of cold and hot air, long defrosting time and high energy consumption. Especially in the corners, side walls and other areas of the refrigerator where air circulation is poor, frost is easy to accumulate and difficult to be effectively covered by the traditional air outlet mode, forming a defrosting dead angle. Long-term use will affect the refrigeration efficiency of the refrigerator, and even shorten the service life of the equipment.

[0003] The defrosting trigger of the traditional refrigerator depends on a single temperature sensor for judgment, which is easy to misjudge due to environmental humidity, use frequency and other factors, resulting in "not starting when it should be defrosted" or "frequent starting when it does not need to be defrosted". Frequent invalid defrosting will increase energy consumption, while delayed defrosting will reduce heat exchange efficiency due to thick frost, further exacerbating energy waste, and affecting the preservation effect of food in the refrigerator.

[0004] Therefore, we propose a refrigerator with automatic defrosting function. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a refrigerator with automatic defrosting function to solve the above technical defects.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: a refrigerator with automatic defrosting function, the refrigerator comprises: a cabinet shell layer, an inner container storage layer and a heat preservation layer, the inner container storage layer is fixedly arranged inside the cabinet shell layer, and a heat preservation layer is further arranged between the inner wall of the cabinet shell layer and the outer side of the inner container storage layer; The automatic defrosting unit comprises a sliding limiting frame and a displacement movable frame, the sliding limiting frame is fixedly arranged on both sides of the top of the inner container storage layer, and the displacement movable frame is slidably arranged on the top of the two sliding limiting frames; the air outlet pipe is rotatably arranged in the inner displacement movable frame, and the displacement movable frame is provided with an opening on one side; a plurality of air inlet pipes are arranged on both sides of the inner container storage layer, the plurality of air inlet pipes are arranged in an up-down arrangement on both sides of the inner container storage layer, and the two ends of the plurality of air inlet pipes are fixedly provided with air guide connecting blocks; a heating wire is arranged in each of the plurality of air inlet pipes; The refrigerator is further provided with an automatic defrosting control module, which judges whether the defrosting condition is met through multi-sensor data fusion; after triggering defrosting, the air outlet angle and hot air temperature are dynamically calculated and controlled according to the regional temperature and frosting state fed back by the sensor.

[0007] Preferably, the upper and lower two adjacent air inlet pipes are connected by a conduit, and the two ends of the conduit are respectively connected to the air guide connection blocks at one end of the two air inlet pipes.

[0008] Preferably, the plurality of air inlet pipes form an "S" shape air inlet structure, the inside of the uppermost air inlet pipe is connected to the inside of the air outlet pipe through a spring air guide pipe, one end of the spring air guide pipe is connected to the inside of the air guide connection block provided at one end of the air inlet pipe, and the inside of the lowermost air inlet pipe is connected to the hot air generating device through a conduit, and the conduit is connected to the air guide connection block at one end of the air inlet pipe.

[0009] Preferably, a control servo motor is fixedly arranged on one side of the inside of the displacement movable frame, an output shaft of the control servo motor is fixedly arranged with a rotating shaft through a shaft coupling, one end of the rotating shaft extends to one side of the inside of the displacement movable frame, and a driving gear is fixedly arranged on one end of the rotating shaft, a matching gear slot is arranged on the top of the sliding limiting frame, and the inside of the matching gear slot is in meshing transmission with the tooth surface of the driving gear; one end of the air outlet pipe is fixedly arranged with a connecting shaft, a bevel gear one is fixedly arranged on one side of the surface of the rotating shaft, a bevel gear two is arranged on one side of the surface of the connecting shaft, and the teeth between the bevel gear one and the bevel gear two are in meshing transmission.

[0010] Preferably, a micro electric cylinder is fixedly arranged in the inside of the connecting shaft, a positioning clamping block is fixedly arranged on the top end of the driving shaft of the micro electric cylinder, an internal gear slot is arranged in the inside of the bevel gear two, and a protruding tooth that matches the internal gear slot is arranged on the top of the positioning clamping block; a limiting cylinder is fixedly arranged on the upper and lower sides of the inside of the displacement movable frame, and a plurality of limiting holes that match the micro electric cylinder are arranged on the surface of the air outlet pipe.

[0011] Preferably, a plurality of air outlets are arranged in the inside of the air outlet pipe, and the included angles between the plurality of air outlets and the upper end surface of the inner container storage layer are all different.

[0012] Preferably, four air outlets are arranged on the surface of the air outlet pipe, the first air outlet and the upper end surface of the inner container storage layer are in a horizontal state, the second air outlet and the upper end surface of the inner container storage layer form an included angle of 45°, the third air outlet and the upper end surface of the inner container storage layer form an included angle of 75°, and the two sides in the inside of the fourth air outlet respectively face the front and back sides.

[0013] Preferably, the control method of the automatic defrosting control module is as follows: Step one: real-time acquisition of multiple parameters: the surface temperature of the evaporator is detected in real time through the NTC temperature sensor installed on the surface of the evaporator, the humidity inside the refrigerator is detected in real time through the capacitive humidity sensor installed on the upper side of the inside of the inner container storage layer, and the thickness of the frost layer inside the refrigerator is detected in real time through the ultrasonic ranging sensor installed on the upper side of the evaporator. ​​ Conduct real-time detection; Step 2: Determine the defrost trigger condition: Dynamically set the evaporator temperature threshold according to the type of refrigerator and the use environment , Humidity threshold inside the cabinet and frost thickness threshold ; When the following conditions are met at the same time When the automatic defrost control module determines that defrosting is required, it triggers the defrost program; Step 3: Calculate and adjust the air outlet angle: Divide the interior of the refrigerator into N areas, monitor the temperature of the N areas in real time through temperature sensors, and calculate the temperature difference between different areas. , determine the priority direction of air supply and adjust the air outlet angle of the air outlet duct ; Step 4: Calculation and control of hot air temperature: according to the thickness of the frost layer inside the freezer , dynamically adjust the heating power inside the air inlet pipe , and then control the hot air temperature ;pass Calculate the heating power inside the air inlet pipe ; Then according to the formula Calculate the hot air temperature ; Step 5: Monitoring and termination of the defrost process: During the defrost process, various sensors are continuously used to monitor the evaporator surface temperature, humidity inside the cabinet, frost thickness and temperature in each area. When the relevant parameters return to the normal range, the automatic defrost control module terminates the defrost program and the freezer returns to normal refrigeration state.

[0014] Compared with the existing technology, it has the following beneficial effects: 1. Defrosting is triggered by multi-sensor fusion, and the angle of the air outlet duct is dynamically adjusted based on the regional temperature difference, so that hot air can accurately cover the corners, side walls and other areas prone to frost formation in the freezer. At the same time, the heating power is adjusted according to the thickness of the frost layer to achieve dynamic adaptation of the hot air temperature. Combined with the rotation and reciprocating movement of the air outlet duct and the multi-angle air outlet design, it breaks the limitations of traditional fixed air outlet, accelerates the mixing of cold and hot air, greatly shortens the defrost time, and can remove frost in dead corners, solving the problem of incomplete traditional defrosting.

[0015] 2、The automatic defrosting unit adopts the sliding cooperation of the sliding limiting frame and the displacement movable frame, combines the locking structure of the servo motor, the helical gear transmission and the limiting electric cylinder, realizes the stable movement and angle fixation of the air outlet pipe, the "S" shape layout of the air inlet pipe and the flexible connection of the spring air guide pipe ensure that the hot air transportation is not affected by the movement of the air outlet pipe, at the same time, the clutching of the positioning clamping block and the helical gear is controlled through the micro electric cylinder, the rotating and fixed state of the air outlet pipe can be flexibly switched, the air supply direction can be accurately adjusted, the reliability of the mechanical structure operation can be ensured, and the defrosting requirements of different volume refrigerators are adapted.

[0016] 3、Through the multi-parameter triggering mechanism, the invalid defrosting caused by single condition misjudgment is avoided, and energy waste is reduced, the dynamic matching of the heating power and the hot air temperature can output heat according to the frost degree, reduces the overall energy consumption, in addition, the defrosting process does not need manual intervention, and the temperature influence on the food in the cabinet is reduced through accurate temperature control, combined with the stable operation of the mechanical structure, the convenience of the refrigerator use and the food preservation effect are improved.

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application, and the purposes and other advantages of the present application can be achieved and obtained by the structure indicated in the specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of a refrigerator structure with automatic defrosting function according to an embodiment of the present application; Figure 2 It is a schematic view of the internal structure of the cabinet shell layer according to an embodiment of the present application; Figure 3 It is a schematic view of the air inlet pipe and the air outlet pipe structure according to an embodiment of the present application; Figure 4 It is a schematic view of the internal structure of the displacement movable frame according to an embodiment of the present application; Figure 5 It is a schematic view of the air outlet pipe, the connecting shaft and the helical gear structure according to an embodiment of the present application; Figure 6 It is a side view of the internal structure of the air outlet pipe according to an embodiment of the present application; Figure 7 It is a control method flow chart of the automatic defrosting control module according to an embodiment of the present application.

[0019] In the figure, 1, cabinet shell layer; 2, inner container storage layer; 3, heat preservation layer; 4, automatic defrosting unit; 5, sliding limit frame; 6, air inlet pipe; 7, displacement movable frame; 8, air outlet pipe; 9, air guide connecting block; 10, spring air guide pipe; 11, control servo motor; 12, rotating shaft; 13, driving gear; 14, bevel gear one; 15, connecting shaft; 16, bevel gear two; 17, micro electric cylinder; 18, positioning clamping block; 19, limit electric cylinder; 20, limit hole; 21, air outlet. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Embodiment 1 Please refer to Figures 1 to 6 As shown in the figure, a refrigerator with automatic defrosting function, the refrigerator comprises: cabinet shell layer 1, inner container storage layer 2 and heat preservation layer 3, the inner container storage layer 2 is fixedly arranged in the cabinet shell layer 1, and the heat preservation layer 3 is further arranged between the inner wall of the cabinet shell layer 1 and the outer side of the inner container storage layer 2; in order to realize the automatic defrosting operation of the refrigerator, the automatic defrosting unit 4 is further arranged on both sides of the top of the inner container storage layer 2, and the automatic defrosting unit 4 on both sides is used for automatically defrosting the inside of the refrigerator.

[0022] Further, the automatic defrosting unit 4 comprises a sliding limiting frame 5 and a displacement movable frame 7, and the sliding limiting frame 5 is fixedly arranged at the top of the inner container storage layer 2, and the displacement movable frame 7 is slidably arranged at the top of the sliding limiting frame 5; the automatic defrosting unit 4 on one side is taken as an example to specifically explain the structural composition, and the air outlet pipe 8 is rotatably arranged in the displacement movable frame 7, and the displacement movable frame 7 is provided with an opening on one side; a plurality of air inlet pipes 6 are arranged on the two sides of the inner container storage layer 2, and the plurality of air inlet pipes 6 are arranged in an up-down arrangement on the two sides of the inner container storage layer 2, and the two ends of the plurality of air inlet pipes 6 are fixedly provided with air guide connecting blocks 9, and the air inlet pipes 6 are connected by a duct, and the two ends of the duct are connected with the air guide connecting blocks 9 at one end of the two air inlet pipes 6; the plurality of air inlet pipes 6 form an "S" shape air inlet structure, the inside of the uppermost air inlet pipe 6 is communicated with the inside of the air outlet pipe 8 through a spring air guide pipe 10, one end of the spring air guide pipe 10 is connected with the air guide connecting block 9 arranged at one end of the air inlet pipe 6, and the inside of the lowermost air inlet pipe 6 is communicated with a hot air generating device through a duct, and the duct is connected with the air guide connecting block 9 at one end of the air inlet pipe 6; wherein the hot air generating device is arranged below the cabinet shell layer 1, and the hot air generating device comprises an evaporator and a heating pipe, and the evaporator is responsible for refrigeration during refrigeration cycle; and when the defrosting mode is entered, the heating pipe is started to heat the evaporator and the surrounding air, and the generated hot air is transported to the air outlet pipe 8 through the air inlet pipe 6, and then blown to the inside of the refrigerator through the air outlet of the air outlet pipe 8 to realize defrosting operation.

[0023] Further, the inside of the plurality of air inlet pipes 6 is provided with a heating wire, and the plurality of heating wires are heating wires with a power of 100W; during daily defrosting operation, only the heating wire in the inside of one air inlet pipe 6 is started to heat the air, and when it is detected that the frost in the corner area is serious, the heating wires in the insides of other air inlet pipes 6 are controlled to work to improve the heating temperature of the air, thereby effectively increasing the defrosting effect on the area with serious frost.

[0024] Embodiment 2 As a further description of the scheme in this embodiment, the traditional refrigerator is fixedly arranged in a downward air outlet mode, the air circulation range and mode are limited, the cold and hot air mixing efficiency is low, in order to further improve the defrosting effect, the blowing angle of the air outlet pipe 8 is flexibly adjusted, the hot air is sent in multiple angles and multiple positions, the hot air is quickly and uniformly diffused in the refrigerator, the frost layer is quickly melted, compared with the traditional air outlet mode, the defrosting time can be greatly shortened; at the same time, the corners, side walls and other areas in the refrigerator are high-frost positions, and the traditional air outlet mode cannot effectively cover these areas, the air outlet pipe 8 is controlled to rotate and move to accurately blow the air to these dead angle areas, and the frost layer in these positions is effectively removed to ensure the comprehensiveness of defrosting.

[0025] Specifically, one side inside the displacement movable frame 7 is fixedly provided with a control servo motor 11, and the output shaft of the control servo motor 11 is fixedly provided with a rotating shaft 12 through a shaft coupling. One end of the rotating shaft 12 extends to one side inside the displacement movable frame 7, and the other end of the rotating shaft 12 is fixedly provided with a drive gear 13. The top of the sliding limiting frame 5 is provided with a matching gear slot, and the inside of the matching gear slot is in meshing transmission with the tooth surface of the drive gear 13. One end of the air outlet pipe 8 is fixedly provided with a connecting shaft 15. One side of the surface of the rotating shaft 12 is fixedly provided with a bevel gear one 14. One side of the surface of the connecting shaft 15 is provided with a bevel gear two 16, and the teeth between the bevel gear one 14 and the bevel gear two 16 are in meshing transmission.

[0026] When the displacement movable frame 7 is controlled to displace, the output shaft of the control servo motor 11 drives the rotating shaft 12 to rotate. The drive gear 13 on the surface of the rotating shaft 12 and the matching gear slot on the top of the sliding limiting frame 5 are in meshing transmission. With the forward and reverse rotation of the drive gear 13, the displacement movable frame 7 reciprocally slides on the top of the sliding limiting frame 5 along the sliding limiting frame 5. At the same time, due to the meshing transmission between the bevel gear one 14 and the bevel gear two 16, the rotating shaft 12 can also drive the air outlet pipe 8 to rotate synchronously. The orientation of the air outlet pipe 8 inside the movable frame 7 is adjusted, the air outlet of the air outlet pipe 8 is changed, and different angle and position blowing operations inside the cabinet body shell layer 1 are realized.

[0027] Further, the inside of the connecting shaft 15 is fixedly provided with a micro electric cylinder 17, and the top end of the driving shaft of the micro electric cylinder 17 is fixedly provided with a positioning clamping block 18. The inside of the bevel gear two 16 is provided with an internal gear slot, and the top of the positioning clamping block 18 is provided with a protruding tooth matched with the internal gear slot. The upper and lower sides inside the displacement movable frame 7 are fixedly provided with a limiting cylinder 19, and the surface of the air outlet pipe 8 is provided with a plurality of limiting holes 20 matched with the micro electric cylinder 17.

[0028] It should be noted that when the orientation of the air outlet pipe 8 is adjusted, the driving end of the micro cylinder 17 controls the engagement connection between the positioning block 18 and the internal tooth groove of the bevel gear two 16. At this time, the bevel gear two 16 and the connecting shaft 15 form a whole, and with the rotation of the bevel gear two 16, the connecting shaft 15 rotates synchronously, so that the air outlet pipe 8 rotates inside the displacement movable frame 7, and the orientation of the air outlet pipe 8 is adjusted inside the displacement movable frame 7. After the orientation adjustment of the air outlet pipe 8 is completed, the output shaft of the upper and lower limiting cylinders 19 is inserted into the limiting hole 20 on the surface of the air outlet pipe 8 to rotate and limit the air outlet pipe 8 inside the displacement movable frame 7. At the same time, the output shaft of the micro cylinder 17 drives the positioning block 18 and the internal tooth groove of the bevel gear two 16 to disengage, so that the bevel gear two 16 and the connecting shaft 15 are separated into two single bodies. At this time, the connecting shaft 15 will not rotate synchronously with the rotation of the bevel gear two 16. With the forward and reverse rotation of the output shaft of the control servo motor 11, the displacement movable frame 7 reciprocally slides on the top of the sliding limiting frame 5, and the displacement movable frame 7 reciprocally slides on the top of the sliding limiting frame 5. The front and back of the refrigerator inside each orientation is fully defrosted.

[0029] Further, the air outlet pipe 8 is provided with a plurality of air outlets 21, and the angles between the plurality of air outlets 21 and the upper end surface of the inner container storage layer 2 are all different. Specifically, four air outlets 21 are arranged on the surface of the air outlet pipe 8. The first air outlet 21 and the upper end surface of the inner container storage layer 2 are in a horizontal state, and the horizontal hot air is sent out through the first air outlet 21. The second air outlet 21 and the upper end surface of the inner container storage layer 2 form a 45° angle, and the hot air inclined downward by 45° is sent out through the second air outlet 21, which can quickly disturb the middle cold air to flow upward and mix with the hot air. The third air outlet 21 and the upper end surface of the inner container storage layer 2 form a 75° angle, and the hot air inclined downward by 75° is sent out through the third air outlet 21, which further disturbs the bottom cold air to flow upward and mix with the hot air. The two sides of the fourth air outlet 21 inside are respectively towards the front and back sides, and the hot air sent out through the fourth air outlet 21 blows to the side wall of the refrigerator, breaks the airflow stratification, and further improves the defrosting effect inside the refrigerator. The inside of each air outlet 21 is controlled by an electromagnetic valve to control the on-off, and by adjusting the position of the air outlet 21 of the air outlet pipe 8 inside the displacement movable frame 7, the corresponding air outlet 21 of the air outlet pipe 8 is directed to the opening on one side of the displacement movable frame 7, so that different angle hot air is sent into the inner container storage layer 2, and the hot air is quickly and uniformly diffused in the refrigerator through multi-angle and multi-position air supply, which accelerates the melting of the frost layer. Compared with the traditional air outlet mode, the defrosting time can be greatly shortened.

[0030] Example 3 Please refer to Figure 7As shown, specifically, the interior of the freezer is also provided with an automatic defrost control module. The automatic defrost control module determines whether the defrost conditions are met through multi-sensor data fusion. When defrosting is triggered, the air outlet angle and hot air temperature are dynamically calculated and controlled based on the regional temperature and frost status fed back by the sensors to achieve precise defrosting. The control method of the automatic defrost control module is as follows: Step 1: Real-time acquisition of multiple parameters: The NTC temperature sensor installed on the evaporator surface is used to measure the evaporator surface temperature. Real-time detection is performed by installing a capacitive humidity sensor above the inner storage layer 2 to measure the humidity inside the refrigerator. Real-time detection is carried out by installing an ultrasonic distance sensor above the evaporator to measure the thickness of the frost layer inside the refrigerator. Conduct real-time detection; Step 2: Determine the defrost trigger condition: Dynamically set the evaporator temperature threshold according to the type of refrigerator and the use environment , Humidity threshold inside the cabinet and frost thickness threshold ; When the following conditions are met at the same time When the automatic defrost control module determines that defrosting is required, it triggers the defrost program; Step 3: Calculate and adjust the air outlet angle: Divide the interior of the refrigerator into N areas, monitor the temperature of the N areas in real time through temperature sensors, and calculate the temperature difference between different areas. , determine the priority direction of air supply and adjust the air outlet angle of the air outlet pipe 8 ; ,in The default air outlet angle of the air outlet pipe 8 is 0° in the horizontal direction. is the angle adjustment coefficient, , dynamically adjust the air outlet angle according to the temperature difference.

[0031] Step 4: Calculation and control of hot air temperature: according to the thickness of the frost layer inside the freezer , dynamically adjust the heating power inside the air inlet pipe 6 , and then control the hot air temperature ;pass Calculate the heating power inside the air inlet pipe 6 ; Then according to the formula Calculate the hot air temperature ;in, The basic heating power is represented by the power of the heating wire inside one air inlet pipe 6 in this solution. The heating power can be increased by increasing the heating wires inside other air inlet pipes 6. Tb is the base hot air temperature, here represented as the temperature to which the air surrounding the evaporator is heated; Kp is the power adjustment coefficient, specifically 20 W / mm, for each 1 mm of frost layer thickness, the power is increased by 20 W; Ki is the temperature adjustment coefficient, specifically 0.5 °C / W, for each 1 W of power increase, the hot air temperature is increased by 0.5 °C.

[0032] Step five: defrosting process monitoring and termination: during the defrosting process, the evaporator surface temperature, the cabinet humidity, the frost layer thickness, and the temperature of each region are continuously monitored by various sensors. When the relevant parameters return to the normal range (such as the frost layer thickness being less than the set termination threshold, the temperature difference of each region being less than the set value, etc.), the automatic defrosting control module terminates the defrosting program, and the refrigerator returns to the normal refrigeration state.

[0033] Example 4 Specifically, the refrigerator working method with automatic defrosting function is also disclosed in this embodiment, as follows: Through the fusion analysis of the collected multiple parameters by the automatic defrosting control module, the defrosting program is triggered when the following conditions are met simultaneously: wherein, , and are threshold values dynamically set according to the type of refrigerator and the use environment, specifically, , and ; The control servo motor 11 is started, and its output shaft drives the rotating shaft 12 to rotate. Through the engagement of the driving gear 13 and the mating gear slot on the top of the sliding limit frame 5, the displacement movable frame 7 is driven to slide forward and backward on the sliding limit frame 5. At the same time, the rotating shaft 12 engages with the bevel gear two 16 on the connecting shaft 15 through the bevel gear one 14, driving the air outlet pipe 8 to rotate in the displacement movable frame 7. The positioning block 18 is controlled by the micro electric cylinder 17 to engage with the inner gear slot of the bevel gear two 16, ensuring the synchronous rotation of the air outlet pipe 8. After adjusting to the target angle, the output shaft of the limiting cylinder 19 is inserted into the limiting hole 20 on the surface of the air outlet pipe 8 to fix the angle. Then, the temperature difference of different regions is calculated, and the outlet angle is adjusted according to the formula. According to the frost layer thickness, the heating wires in the air inlet pipe 6 of the corresponding power are selected to work by the formula. The thicker the frost, the more heating wires are started, and the total heating power is increased. During the defrosting process, the evaporator surface temperature, the cabinet humidity, the frost layer thickness, and the temperature of each region are continuously monitored by various sensors. When the relevant parameters return to the normal range (such as the frost layer thickness being less than the set termination threshold, the temperature difference of each region being less than the set value, etc.), the automatic defrosting control module terminates the defrosting program, and the refrigerator returns to the normal refrigeration state.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A refrigerator having an automatic defrosting function, characterized by comprising: The refrigerator comprises a cabinet shell layer (1), an inner container storage layer (2) and a heat preservation layer (3), the inner container storage layer (2) is fixedly arranged inside the cabinet shell layer (1), and the heat preservation layer (3) is further arranged between the inner wall of the cabinet shell layer (1) and the outer side of the inner container storage layer (2); The automatic defrosting unit (4) comprises sliding limit frames (5) and displacement movable frames (7), the sliding limit frames (5) are fixedly arranged on both sides of the top of the inner container storage layer (2), and the displacement movable frames (7) are slidingly arranged on the top of the two sliding limit frames (5); the air outlet pipe (8) is rotatably arranged in the displacement movable frame (7), and the displacement movable frame (7) is provided with an opening on one side; a plurality of air inlet pipes (6) are arranged on both sides of the inner container storage layer (2), the plurality of air inlet pipes (6) are arranged in an up-down arrangement on both sides of the inner container storage layer (2), and the air inlet pipes (6) are fixedly provided with air guide connecting blocks (9) at both ends; the air inlet pipes (6) are provided with heating wires. The refrigerator is further provided with an automatic defrosting control module, which judges whether the defrosting condition is met through multi-sensor data fusion; after triggering defrosting, the air outlet angle and hot air temperature are dynamically calculated and controlled according to the regional temperature and frosting state fed back by the sensor.

2. The refrigerator having an automatic defrosting function according to claim 1, wherein The air inlet pipes (6) are connected through a duct, and the two ends of the duct are connected to the air guide connecting blocks (9) at one end of the two air inlet pipes (6).

3. The refrigerator having an automatic defrosting function according to claim 1, wherein The air inlet pipes (6) form an "S" shape air inlet structure, the inside of the uppermost air inlet pipe (6) is communicated with the inside of the air outlet pipe (8) through a spring air guide pipe (10), one end of the spring air guide pipe (10) is connected to the inside of the air guide connecting block (9) arranged at one end of the air inlet pipe (6), and the inside of the lowermost air inlet pipe (6) is communicated with a hot air generating device through a duct, and the duct is connected to the inside of the air guide connecting block (9) at one end of the air inlet pipe (6).

4. The refrigerator having an automatic defrosting function according to claim 1, wherein The control servo motor (11) is fixedly arranged on one side in the displacement movable frame (7), the output shaft of the control servo motor (11) is fixedly provided with a rotating shaft (12) through a shaft coupling, one end of the rotating shaft (12) extends to one side in the displacement movable frame (7), and the driving gear (13) is fixedly arranged at one end of the rotating shaft (12); the top of the sliding limit frame (5) is provided with a matching gear slot, and the inside of the matching gear slot is in meshing transmission with the tooth surface of the driving gear (13); one end of the air outlet pipe (8) is fixedly provided with a connecting shaft (15), one side of the surface of the rotating shaft (12) is fixedly provided with a bevel gear one (14), one side of the surface of the connecting shaft (15) is provided with a bevel gear two (16), and the teeth between the bevel gear one (14) and the bevel gear two (16) are in meshing transmission.

5. The refrigerator having an automatic defrosting function according to claim 4, wherein The inside of the connecting shaft (15) is fixedly provided with a micro electric cylinder (17), and the top end of the driving shaft of the micro electric cylinder (17) is fixedly provided with a positioning clamping block (18); the inside of the bevel gear (16) is provided with an internal tooth groove, and the top of the positioning clamping block (18) is provided with a convex tooth matching the internal tooth groove; the inside of the displacement movable frame (7) is fixedly provided with a limiting electric cylinder (19) upwards and downwards, and the surface of the air outlet pipe (8) is provided with a plurality of limiting holes (20) matching the micro electric cylinder (17).

6. The refrigerator having an automatic defrosting function according to claim 1, wherein The inside of the air outlet pipe (8) is provided with a plurality of air blowing openings (21), and the included angles between the plurality of air blowing openings (21) and the upper end surface of the inner container storage layer (2) are all different.

7. The refrigerator having an automatic defrosting function according to claim 6, wherein The four air blowing openings (21) on the surface of the air outlet pipe (8) are provided with the first air blowing opening (21) and the upper end surface of the inner container storage layer (2) in a horizontal state; the second air blowing opening (21) and the upper end surface of the inner container storage layer (2) form an included angle of 45°; the third air blowing opening (21) and the upper end surface of the inner container storage layer (2) form an included angle of 75°; and the two sides of the fourth air blowing opening (21) are respectively towards the front and rear sides.

8. The refrigerator having an automatic defrosting function according to claim 1, wherein The control method of the automatic defrosting control module is as follows: Step one: multi-parameter real-time acquisition: through the NTC temperature sensor installed on the surface of the evaporator to detect the surface temperature of the evaporator Real-time detection is carried out by installing a capacitive humidity sensor on the top of the inner container storage layer (2) to detect the humidity inside the refrigerator Real-time detection is carried out by installing an ultrasonic ranging sensor above the evaporator to detect the frost thickness inside the refrigerator Real-time detection is carried out; Step two: Defining the defrost trigger condition: dynamically setting the evaporator temperature threshold according to the type of refrigerator and the use environment , the threshold of the humidity in the cabinet and the threshold of the frost thickness ; When the following conditions are met simultaneously the automatic defrosting control module determines that defrosting is required, triggering the defrosting program; Step 3: Calculate and adjust the air outlet angle: Divide the interior of the refrigerator into N areas, monitor the temperature of the N areas in real time through temperature sensors, and calculate the temperature difference between different areas. , determine the priority air supply direction and adjust the air outlet angle of the air outlet pipe (8) ; Step four: hot air temperature calculation and control: according to the frost thickness inside the refrigerator , dynamically adjust the heating power inside the air inlet pipe (6) , and then control the hot air temperature ; by calculating the heating power inside the air inlet pipe (6) ; and then according to the formula , the hot air temperature is calculated Step five: defrosting process monitoring and termination: during the defrosting process, the surface temperature of the evaporator, the humidity in the cabinet, the thickness of the frost layer and the temperature of each area are continuously monitored through various sensors; when the related parameters return to the normal range, the automatic defrosting control module terminates the defrosting program, and the refrigerator returns to the normal refrigeration state.

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