Shelving lifting device, shelving assembly, refrigerator and control method

Abstract

The present invention relates to a shelf lifting device, a shelf assembly, a refrigerator and a control method, belonging to the technical field of refrigerators, and solves the problem in the prior art that the refrigerator shelf lifting device cannot achieve the stable lifting of the whole shelf, and there are many inconveniences in use. The shelf lifting device is arranged below the shelf and includes a driving mechanism, a balance base frame and a transmission mechanism installed on the balance base frame. The transmission mechanism includes a double-helix worm structure and lifting transmission structures respectively meshing with both ends thereof. The double-helix worm structure is connected to the driving mechanism. The driving mechanism can drive the lifting transmission structures to move through the double-helix worm structure so as to drive the balance base frame connected to the lifting transmission structures and the shelf placed above the balance base frame to move to a predetermined height position, thereby realizing the stable lifting of the shelf, enabling the partition to be stably fixed at a specified position, with a simple overall structure, and the user can effectively adjust the height of the partition according to needs.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a shelf lifting device, a shelf assembly, a refrigerator and a control method. Background Art

[0002] With the popularization of refrigerators in life, refrigerators can not only improve the aesthetics of the kitchen but also significantly improve the freshness level of kitchen food and the quality of life. In recent years, with the development of the economy, people are getting richer, and the types of food in the refrigerator are also increasing. The stored food is no longer just frozen products and meat, and the designed capacity of the refrigerator is also getting larger.

[0003] Although the increase in the capacity of the refrigerator has increased the storage space for food, it is accompanied by bulky and relatively high glass shelves. For petite people, the elderly or children, it is very inconvenient to manually adjust the height of the glass shelves and take and place the food on the shelves. With the rapid development of the home appliance industry, the intelligence and convenience of home appliances have become a major trend. How to enable users to enjoy the convenience and humanization brought by scientific and technological progress is the development direction of the current home appliance industry.

[0004] There are glass shelves on the market that can be adjusted in height up and down. The patent with the publication number CN203836516U discloses a hand-cranked lifting device, which can be lifted and lowered by hand-cranking, but this device cannot achieve self-locking and hovering, nor can it achieve automatic up and down movement, and it is inconvenient to use. In addition, relying on the meshing of the gear rack on a single side can only achieve stable lifting with the center of gravity near the vertical bracket, and the vertical guide rail seriously affects the placement of items, and it is impossible to achieve stable lifting of the entire plane. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a shelf lifting device, a shelf assembly, a refrigerator and a control method to solve the technical problems in the prior art that the refrigerator shelf lifting device cannot achieve stable lifting of the entire shelf and there are many inconveniences in use.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] According to the first aspect of the embodiment of the present invention, a shelf lifting device is provided, which is arranged below the shelf and includes a driving mechanism, a balance base frame and a transmission mechanism installed on the balance base frame, wherein: the transmission mechanism includes a double-helical worm structure and lifting transmission structures respectively meshing with both ends thereof, the double-helical worm structure is connected to the driving mechanism, and the driving mechanism can drive the lifting transmission structures to move through the double-helical worm structure so as to drive the balance base frame connected to the lifting transmission structures and the shelf placed above the balance base frame to move to a predetermined height position.

[0008] Furthermore, the driving mechanism includes a power structure and a power transmission structure, the power structure is fixed on the balancing base frame and a transmission connection is formed between the power structure and the double-rotation worm structure through the power transmission structure, and the power structure can drive the double-rotation worm structure to rotate through the power transmission structure.

[0009] Furthermore, the power transmission structure includes a first gear, a second gear and a belt, the output end of the power structure is meshed with the first gear, the second gear is provided on the double-rotation worm structure and the rotation directions of the second gear on both sides of the double-rotation worm structure are opposite, and the first gear and the second gear are connected by the belt transmission.

[0010] Furthermore, the driving mechanism comprises a manual rocker structure, and the rocker structure is fixed to the end of the double-rotation worm structure.

[0011] Furthermore, the lifting transmission structure includes a worm gear, a worm wheel, a lifting gear and a lifting rack. The worm gear is movably mounted on the balancing base and the worm wheel is provided on the middle section of the worm gear. The worm wheel cooperates with the double-rotation worm structure. The lifting gear is provided at both ends of the worm gear. The rotation of the double-rotation worm structure can drive the lifting gear to move along the lifting rack fixed on the inner side of the refrigerator through the worm wheel.

[0012] Furthermore, the balancing base frame includes a shelf placement portion arranged at horizontal intervals and a lifting transmission structure mounting portion arranged at the bottom of the shelf placement portion, and a support surface for placing the shelf is formed on the surface of the shelf placement portion facing away from the lifting transmission structure mounting portion, and a double-rotation worm mounting portion for mounting the double-rotation worm structure is present on the shelf placement portion, and the lifting transmission structure is movably mounted on the lifting transmission structure mounting portion.

[0013] Furthermore, the shelf placement portion includes two horizontally placed supporting beams, the upper surfaces of the supporting beams are formed with supporting surfaces for placing the shelves, the double-rotation worm mounting portion is fixedly connected to each of the supporting beams, and the two double-rotation worm mounting portions are arranged opposite to each other in a direction perpendicular to the supporting beams, and the supporting beams are provided with avoidance opening grooves for installing the double-rotation worm structure, and the two ends of the double-rotation worm structure are installed on the double-rotation worm mounting portions.

[0014] Furthermore, the transmission mechanism also includes an auxiliary transmission structure, which is arranged at both ends of the balancing base and located outside the lifting transmission structure. The lifting transmission structure can drive the auxiliary transmission structure to move through the balancing base.

[0015] Further, the auxiliary transmission structure includes a gear shaft, auxiliary gears arranged at both ends of the gear shaft, and an auxiliary rack engaged with the auxiliary gears. The auxiliary rack is fixedly arranged inside the refrigerator, the gear shaft is fixedly connected with the balance base frame, and the auxiliary gears can rotate relative to the gear shaft.

[0016] Further, the shelf lifting device further includes a main refrigerator control module, and the main refrigerator control module is electrically connected to the power structure.

[0017] Further, the shelf lifting device further includes a height detection module, and the height detection module is connected to the main refrigerator control module for detecting the height between the shelf to be moved and its adjacent shelf, and the height of the objects stored on the shelf to be moved and the lower shelf adjacent to the shelf to be moved.

[0018] According to the second aspect of the embodiments of the present invention, a shelf assembly is provided, including a shelf and a shelf lifting device. Among them, the shelf lifting device is the above-mentioned shelf lifting device, and the shelf is movably arranged on the shelf lifting device.

[0019] According to the third aspect of the embodiments of the present invention, a refrigerator is provided, including a box body, and a storage space is defined inside the box body, and the above-mentioned shelf lifting device is arranged in the storage space.

[0020] According to the fourth aspect of the embodiments of the present invention, a control method for a shelf lifting device is provided, which is used for the above-mentioned shelf lifting device. The method includes:

[0021] Obtain a lifting instruction;

[0022] Drive the transmission mechanism through the drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position.

[0023] Further, the drive mechanism includes a manual drive mechanism and an electric drive mechanism. The manual drive mechanism is fixedly arranged at the end of the double-helical worm structure, and the electric drive mechanism is fixedly arranged on the balance base frame and forms a transmission connection with the double-helical worm structure, and drives the double-helical worm structure to rotate through the manual drive mechanism or the electric drive mechanism.

[0024] Further, the step of driving the transmission mechanism through the drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes:

[0025] Judge whether the shelf lifting device is powered on;

[0026] If so, drive the transmission mechanism through the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position;

[0027] If not, drive the transmission mechanism through the manual drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position.

[0028] Further, in the step of obtaining the lifting instruction, when the obtained instruction is the rising instruction, the step of driving the transmission mechanism through the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes:

[0029] Obtain the distance between the shelf to be moved and the upper adjacent shelf and the height of the object stored on the shelf to be moved;

[0030] Calculate the first height difference between the distance between the shelf to be moved and the upper adjacent shelf and the height of the object stored on the shelf to be moved;

[0031] Compare the first height difference with the rising preset value to obtain a first comparison result;

[0032] Control the rising height of the balance base frame according to the first comparison result.

[0033] Further, the controlling the rising height of the balance base frame according to the first comparison result includes:

[0034] If the first height difference is less than the rising preset value, control the rising height of the balance base frame to be the value of the first height difference;

[0035] If the first height difference is greater than or equal to the rising preset value, control the rising height of the balance base frame to be the value of the rising preset value.

[0036] Further, in the step of obtaining the lifting instruction, when the obtained instruction is the descending instruction, the step of driving the transmission mechanism through the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes:

[0037] Obtain the distance between the shelf to be moved and the lower adjacent shelf and the height of the object stored on the lower adjacent shelf to the shelf to be moved;

[0038] Calculate the second height difference between the distance between the shelf to be moved and the lower adjacent shelf and the height of the object stored on the lower adjacent shelf;

[0039] Compare the second height difference with the descending preset value to obtain a second comparison result;

[0040] Control the descending height of the balance base frame according to the second comparison result.

[0041] Further, the controlling the descending height of the balance base frame according to the second comparison result includes:

[0042] If the second height difference is less than the preset descending value, control the descending height of the balance base frame to be the value of the second height difference; if the second height difference is greater than or equal to the preset descending value, control the descending height of the balance base frame to be the value of the preset descending value.

[0043] The shelf lifting device provided by the present invention is integrally arranged below the shelf to support the shelf, and includes a driving mechanism, a balance base frame, and a transmission mechanism installed on the balance base frame. The transmission mechanism adopts a double-helix worm structure, and meshing lifting transmission structures are respectively arranged at both ends of the double-helix worm structure. The driving mechanism can drive the two lifting transmission structures to move through the double-helix worm structure to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position, so as to realize the stable lifting of the shelf; and the shelf lifting device forms a transmission mechanism with a self-locking function by the cooperation of the double-helix worm structure and the worm wheel on the lifting transmission structure, so that the partition can be stably fixed at a specified position. The overall structure is simple, and the user can effectively adjust the height of the partition according to needs. At the same time, the transmission mechanism has the advantages of low noise. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0045] Figure 1 is a schematic structural diagram of the shelf lifting device provided by the embodiment of the present invention;

[0046] Figure 2 is a schematic structural diagram of the balance base frame provided by the embodiment of the present invention;

[0047] Figure 3 is a schematic diagram of the double-helix worm structure provided by the embodiment of the present invention;

[0048] Figure 4 is a schematic diagram of the lifting transmission structure provided by the embodiment of the present invention;

[0049] Figure 5 is a front view of the inside of the refrigerator provided by the embodiment of the present invention;

[0050] Figure 6 It is a partial side sectional view of the refrigerator provided by the embodiment of the present invention;

[0051] Figure 7 It is a partial front sectional view of the refrigerator provided by the embodiment of the present invention;

[0052] Figure 8 It is a top sectional view of the refrigerator provided by the embodiment of the present invention;

[0053] Figure 9 It is a flowchart of the control method of the shelf lifting device provided by the embodiment of the present invention.

[0054] In the figure: 1. Balanced base frame; 11. Support cross beam; 111. Support surface; 112. Avoidance opening groove; 12. Installation part of the lifting transmission structure; 121. Installation hole; 13. Installation part of the double - helix worm; 131. Through hole; 2. Power structure; 3. Power transmission structure; 31. First gear; 4. Double - helix worm structure; 41. Second gear; 5. Lifting transmission structure; 51. Worm rod; 52. Worm gear; 53. Lifting gear; 54. Lifting rack; 6. Manual rocker structure; 7. Auxiliary transmission structure; 72. Auxiliary gear; 73. Auxiliary rack; 8. Shelf; 9. Grating bar; 10. Light - sensing sensor. Detailed implementation manners

[0055] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0056] Refer to Figures 1 to 8 , the present invention provides a shelf lifting device, which is arranged below the shelf 8 and includes a driving mechanism, a balanced base frame 1 and a transmission mechanism installed on the balanced base frame 1. Among them, the transmission mechanism includes a double - helix worm structure 4 and a lifting transmission structure 5 meshing with both ends of the double - helix worm structure 4 respectively. The double - helix worm structure 4 is connected to the driving mechanism, and the driving mechanism can drive the lifting transmission structure 5 to move through the double - helix worm structure 4 to drive the balanced base frame 1 connected to the lifting transmission structure 5 and the shelf 8 placed above the balanced base frame 1 to move to a predetermined height position.

[0057] In the specific implementation process of the embodiments of the present invention, the driving mechanism includes a power structure 2 and a power transmission structure 3. The power structure 2 is a motor, which is fixedly arranged on the balance base 1, and a transmission connection is formed between the power structure 2 and the double-helix worm structure 4 through the power transmission structure 3. The power structure 2 can drive the double-helix worm structure 4 to rotate through the power transmission structure 3.

[0058] Specifically, the power transmission structure 3 includes a first gear 31, a second gear 41 and a belt. The output end of the power structure 2 meshes with the first gear 31. The second gear 41 is arranged on the double-helix worm structure 4 and the helix directions on both sides of the second gear 41 on the double-helix worm structure 4 are opposite. The first gear 31 and the second gear 41 are connected by belt transmission. That is to say, the rotation of the motor can drive the first gear 31 to rotate, and the first gear 31 can drive the second gear 41 to rotate through the belt. Since the second gear 41 is fixed on the double-helix worm structure 4, the rotation of the second gear 41 can drive the double-helix worm structure 4 to rotate.

[0059] Obviously, the above driving mechanism is an electric driving mechanism, which needs electricity to achieve. The shelf lifting device provided with the above driving mechanism has a higher degree of automation, and the balance base 1 can be driven to perform lifting actions by the output power of the motor.

[0060] Of course, the driving mechanism in this embodiment can also be set as a manual driving mechanism. For example, a manual rocker structure 6 is provided at the end of the double-helix worm structure 4 to provide power. At this time, the user needs to apply force on the manual rocker structure 6, and the double-helix worm structure 4 is driven to rotate by rotating the manual rocker structure 6.

[0061] As Figure 1 shown in the shelf lifting device, the design of the electric driving structure and the manual driving structure is integrated. In the case of power failure of the refrigerator, the manual rocker structure 6 can be used to drive the manual rocker structure 6 to rotate, so as to realize the lifting movement of the shelf 8.

[0062] Specifically, the balance base 1 includes a shelf 8 placement part arranged at a horizontal interval and a lifting transmission structure installation part 12 arranged at the bottom of the shelf 8 placement part. The surface of the shelf 8 placement part facing away from the lifting transmission structure installation part 12 forms a support surface 111 for placing the shelf 8, and there is a double-helix worm installation part 13 for installing the double-helix worm structure 4 on the shelf 8 placement part. The lifting transmission structure 5 is movably installed on the lifting transmission structure installation part 12.

[0063] The shelf 8 placement part includes two horizontally placed support crossbeams 11. The upper surface of the support crossbeam 11 forms a support surface 111 for placing the shelf 8. A double - helix worm installation part 13 is fixedly connected to each support crossbeam 11, and the two double - helix worm installation parts 13 are arranged opposite to each other in a direction perpendicular to the support crossbeam 11. An avoidance opening groove 112 for installing the double - helix worm structure 4 is formed on the support crossbeam 11. The middle section of the double - helix worm structure 4 is installed in the avoidance opening groove 112. A through - hole 131 for installing the double - helix worm structure 4 is provided on the double - helix worm installation part 13, and the two ends of the double - helix worm structure 4 can be respectively installed in the corresponding through - holes 131.

[0064] The lifting transmission structure 5 in this embodiment includes a worm shaft 51, a worm gear 52, a lifting gear 53, and a lifting rack 54. The worm shaft 51 is movably installed on the balance base frame 1. Specifically, two lifting transmission structure installation parts 12 are fixed on the two support crossbeams 11. The length direction of the two lifting transmission structure installation parts 12 is perpendicular to the length direction of the support crossbeam 11. An installation hole 121 for installing the worm shaft 51 is provided on the lifting transmission structure installation part 12, and the worm shaft 51 is movably installed in the installation hole 121. A worm gear 52 is provided on the middle section of the worm shaft 51. That is to say, two worm shafts 51 are respectively provided at the two ends of the double - helix worm structure 4. The worm gear 52 on the worm shaft 51 cooperates with the helix on the corresponding double - helix worm structure 4. And a lifting gear 53 is respectively provided at the two ends of each worm shaft 51. The rotation of the double - helix worm structure 4 can drive the worm shaft 51 to rotate through the worm gear 52, and the rotation of the worm shaft 51 can drive the lifting gears 53 at its two ends to move along the lifting rack 54 fixed on the inner side of the refrigerator.

[0065] To prevent the lifting gears 53 on the lifting transmission structure 5 from jumping teeth, the transmission mechanism in this embodiment further includes an auxiliary transmission structure 7. The auxiliary transmission structure 7 is arranged at both ends of the balance base frame 1 and is located outside the lifting transmission structure 5. The lifting transmission structure 5 can drive the auxiliary transmission structure 7 to move through the balance base frame 1, further ensuring the smooth movement of the shelf 8.

[0066] When the shelf 8 rises or falls to a specified position, the double - helix worm structure 4 stops rotating. Due to the self - locking property of the worm gear 52 of the worm shaft 51, the worm gear 52 on the worm shaft 51 cannot rotate, thereby realizing the automatic hovering of the shelf 8 at any position.

[0067] Among them, the auxiliary drive structure 7 in this embodiment includes a gear shaft 71, auxiliary gears 72 arranged at both ends of the gear shaft 71, and an auxiliary rack 73 that cooperates with the auxiliary gears 72. The auxiliary rack 73 is fixedly arranged inside the refrigerator, and the gear shaft 71 is fixedly connected to the lifting drive structure installation part 12 on the balance base frame 1. The auxiliary gear 72 can rotate relative to the gear shaft 71, so as to perform a lifting movement on the corresponding auxiliary rack 73.

[0068] In addition, the above-mentioned shelf lifting device further includes a refrigerator main control module, and the refrigerator main control module is electrically connected to the power structure 2. The refrigerator main control module can be arranged at other positions inside the refrigerator, and it can control the power structure 2 (motor).

[0069] The shelf lifting device further includes a height detection module, and the height detection module is connected to the refrigerator main control module. Here, the height detection module can be set as the grating bar 9 and the light sensor 10 in the prior art, which are respectively arranged on the left and right sides of the storage space inside the refrigerator. It is used to detect the height between the shelf 8 to be moved and its adjacent shelf 8, and the height of the objects stored on the shelf 8 to be moved and the lower shelf 8 adjacent to the shelf 8 to be moved, so as to control the moving distance of the shelf 8.

[0070] When the above-mentioned shelf lifting device works, based on the above structural basis, its control method includes the following steps:

[0071] S1. Obtain a lifting instruction, that is, obtain a lifting parameter H sj , where the preset value of rising (height) is H S , and the preset value of falling (height) is H j ;

[0072] S2. Drive the transmission mechanism through the drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position.

[0073] In the specific implementation process of the embodiment of the present invention, the drive mechanism includes a manual drive mechanism and an electric drive mechanism. The manual drive mechanism is fixedly arranged at the end of the double - helix worm structure 4, and the electric drive mechanism is fixedly arranged on the balance base frame 1 and forms a transmission connection with the double - helix worm structure 4, and drives the double - helix worm structure 4 to rotate through the manual drive mechanism or the electric drive mechanism.

[0074] The above step S2 of driving the transmission mechanism through the drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position specifically includes:

[0075] S21. Judge whether the shelf lifting device is powered on;

[0076] S22. If so, drive the transmission mechanism through the electric drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position, that is, start the automatic mode;

[0077] If not, drive the transmission mechanism through the manual drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position, that is, start the manual mode.

[0078] Optionally, in this embodiment, in step S1 of obtaining the lifting instruction, when the obtained instruction is a rising instruction, in step S22, driving the transmission mechanism through the electric drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position includes:

[0079] Obtain the distance S between the shelf 8 to be moved and the upper shelf 8 adjacent to it S and the height L of the object stored on the shelf 8 to be moved BZ (L BZ is the height of the object stored on the rising shelf 8 when the shelf 8 rises);

[0080] Calculate the distance S between the shelf 8 to be moved and the upper shelf 8 adjacent to it S and the height L of the object stored on the shelf 8 to be moved BZ to obtain the first height difference (S S - L BZ );

[0081] Compare the first height difference with the rising (height) preset value H S to obtain the first comparison result;

[0082] Control the rising height of the balance base frame 1 according to the first comparison result.

[0083] The above-mentioned controlling the rising height of the balance base frame 1 according to the first comparison result specifically includes:

[0084] If the first height difference is less than the rising preset value, control the rising height of the balance base frame 1 to be the value of the first height difference;

[0085] If the first height difference is greater than or equal to the rising preset value, control the rising height of the balance base frame 1 to be the value of the rising preset value.

[0086] Optionally, in step S1 of obtaining the lifting instruction, when the obtained instruction is a descending instruction, in step S22, driving the transmission mechanism through the electric drive mechanism to drive the balance base frame 1 and the shelf 8 placed above the balance base frame 1 to move to a predetermined height position specifically includes:

[0087] Obtain the distance S between the shelf 8 to be moved and the lower shelf 8 adjacent to it Xand the height Lx of the object stored on the lower shelf 8 adjacent to the shelf 8 to be moved Z (Lx Z is the height of the object stored on the adjacent lower shelf 8 when the shelf 8 descends);

[0088] Calculate the distance S between the shelf 8 to be moved and the adjacent lower shelf 8 X and the height Lx of the object stored on the lower shelf 8 Z of the second height difference;

[0089] Compare the second height difference with the descent (height) preset value H j to obtain a second comparison result;

[0090] Control the descent height of the balance base 1 according to the second comparison result.

[0091] Among them, the step of controlling the descent height of the balance base 1 according to the second comparison result specifically includes:

[0092] If the second height difference is less than the descent preset value, control the descent height of the balance base 1 to be the value of the second height difference;

[0093] If the second height difference is greater than or equal to the descent preset value, control the descent height of the balance base 1 to be the value of the descent preset value.

[0094] Specifically, gratings and light sensors 10 are installed on the left and right sides inside the refrigerator. When the user sets a parameter H on the operation interface (equipped with a battery box) sj , rising to H S , descending to H j , the system measures the height L blocked by the stored items of the grating between the shelves 8 Z (divided into L BZ and L xZ , L BZ is the height of the object stored on the rising shelf 8 when the shelf 8 rises, and L xZ is the height of the object stored on the adjacent lower shelf 8 when the shelf 8 descends) and the distance S between two adjacent shelves 8 in the moving direction (S is divided into S S and S X , S S is the distance between the shelf 8 to be moved and the adjacent upper shelf 8, and S X is the distance between the shelf 8 to be moved and the adjacent lower shelf 8) to determine how to execute the movement instruction H input by the system sj , and the control method for executing the instruction is as Figure 9 shown. The system receives the movement instruction H sjAfter that, the system immediately determines whether the refrigerator is powered on. When it is not powered on, the manual mode is enabled, and the manual rocker structure 6 is used to realize the lifting of the shelf 8. When it is determined that the refrigerator is powered on, the system judges H sj and S-L Z The size between them, S is the distance between adjacent shelves 8 in the moving direction. When the shelf 8 moves up, L Z Is the height of the items stored on the moving shelf 8. When the shelf 8 moves down, L Z Is the height of the items stored on the lower shelf 8 adjacent to the moving shelf 8. S-L Z Is the maximum value of the distance that the shelf 8 can move. The judgment method is as follows:

[0095] Judgment condition <![CDATA[H sj ≤S - L Z 、]]> <![CDATA[H sj > S-L Z 、]]> Execution result <![CDATA[H sj > <![CDATA[S-L Z >

[0096] When H sj ≤S-L Z It means that the moving distance H sj Is less than the maximum movable limit. When moving, execute the input instruction of H sj ; When H sj >S-L Z When, it means that the moving distance H sj Is greater than the maximum movable limit, there is a risk of collision of the shelf 8. When moving, execute S-L Z . Through the above structure and control method, the stepless, automatic, precise and self-locking up and down adjustment of the shelf 8 can be realized.

[0097] According to another aspect of the present application, a shelf 8 assembly is provided, including a shelf 8 and the above-mentioned shelf lifting device, and the shelf 8 is movably arranged on the shelf lifting device.

[0098] In addition, the present invention also provides a refrigerator, including a box body, the interior of the box body defines a storage space, and the storage space can be configured into a refrigerated storage space, a frozen storage space, a variable temperature storage space, etc. according to the refrigeration temperature. Specifically, the number, function, and layout of the storage spaces can be configured according to requirements.

[0099] A shelf lifting device is arranged in the storage space. Among them, the shelf lifting device is horizontally arranged, and the shelf 8 is also horizontally arranged on the balance base 1 of the shelf lifting device for supporting the objects to be placed. The shelf lifting device is used to adjust the position height of the shelf 8 up and down, so as to eliminate the limitation in the height direction of the storage space, so that items of different heights can be placed on the shelf 8, thereby improving the utilization rate of the storage space and making the up and down adjustment of the shelf 8 of the refrigerator more accurate, more time-saving and labor-saving.

[0100] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A shelf lifting device, characterized in that, It is arranged below the shelf and includes a driving mechanism, a balance base frame, and a transmission mechanism installed on the balance base frame, where: The transmission mechanism includes a double - helix worm structure and lifting transmission structures respectively meshing with its two ends. The double - helix worm structure is connected to the driving mechanism. The driving mechanism can drive the lifting transmission structures to move through the double - helix worm structure, so as to drive the balance base frame connected to the lifting transmission structures and the shelf placed above the balance base frame to move to a predetermined height position; The lifting transmission structure includes a worm rod, a worm wheel, lifting gears, and a lifting rack. The worm rod is movably installed on the balance base frame, and the worm wheel is arranged on the middle section of the worm rod. The worm wheel cooperates with the double - helix worm structure. The lifting gears are arranged at both ends of the worm rod. When the double - helix worm structure rotates, it can drive the lifting gears to move along the lifting rack fixed on the inner side of the refrigerator through the worm wheel; The transmission mechanism further includes an auxiliary transmission structure. The auxiliary transmission structure is arranged at both ends of the balance base frame and on the outer side of the lifting transmission structure. The lifting transmission structure can drive the auxiliary transmission structure to move through the balance base frame; The auxiliary transmission structure includes a gear shaft, auxiliary gears arranged at both ends of the gear shaft, and auxiliary racks cooperating with the auxiliary gears. The auxiliary racks are fixed on the inner side of the refrigerator. The gear shaft is fixedly connected to the balance base frame, and the auxiliary gears can rotate relative to the gear shaft.

2. The shelf lifting device according to claim 1, characterized in that, The driving mechanism includes a power structure and a power transmission structure. The power structure is fixedly installed on the balance base frame, and there is a transmission connection between the power structure and the double - helix worm structure through the power transmission structure. The power structure can drive the double - helix worm structure to rotate through the power transmission structure.

3. The shelf lifting device according to claim 2, wherein, The power transmission structure includes a first gear, a second gear, and a belt. The output end of the power structure meshes with the first gear. The second gear is arranged on the double - helix worm structure, and the helix directions on both sides of the second gear on the double - helix worm structure are opposite. The first gear and the second gear are connected by belt transmission.

4. The shelf lifting device according to claim 1 or 2, characterized in that, The driving mechanism includes a manual rocker structure, and the rocker structure is fixedly installed at the end of the double - helix worm structure.

5. The shelf lifting device according to claim 1, characterized in that, The balance base frame includes a shelf placement part arranged horizontally at intervals and a lifting transmission structure installation part arranged at the bottom of the shelf placement part. The surface of the shelf placement part facing away from the lifting transmission structure installation part forms a support surface for placing the shelf, and there is a double - helix worm installation part for installing the double - helix worm structure on the shelf placement part. The lifting transmission structure is movably installed on the lifting transmission structure installation part.

6. The shelf lifting device according to claim 5, characterized in that, The shelf placement part includes two horizontally placed support crossbeams. The upper surface of each support crossbeam forms a support surface for placing the shelf. Each support crossbeam is fixedly connected with a double - helix worm installation part, and the two double - helix worm installation parts are arranged opposite to each other in a direction perpendicular to the support crossbeam. An avoidance opening groove for installing the double - helix worm structure is formed on the support crossbeam, and both ends of the double - helix worm structure are installed on the double - helix worm installation parts.

7. The shelf lifting device according to claim 2, characterized in that, The shelf lifting device further includes a main refrigerator control module, and the main refrigerator control module is electrically connected to the power structure.

8. The shelf lifting device according to claim 7, wherein, The shelf lifting device further includes a height detection module. The height detection module is connected to the main refrigerator control module and is used to detect the height between the shelf to be moved and its adjacent shelf, and the height of the objects stored on the shelf to be moved and the lower shelf adjacent to the shelf to be moved.

9. A shelf assembly, characterized in that, It includes a shelf and a shelf lifting device. Among them, the shelf lifting device is the shelf lifting device according to any one of claims 1 - 8, and the shelf is movably arranged on the shelf lifting device.

10. A refrigerator, characterized in that, It includes a box body. A storage space is defined inside the box body, and the shelf lifting device according to any one of claims 1 - 8 is arranged in the storage space.

11. A control method for a shelf lifting device, characterized in that, For the shelf lifting device according to any one of claims 1 to 8, the method includes: Obtain a lifting instruction; Drive the transmission mechanism through the drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position.

12. The control method of the shelf lifting device according to claim 11, characterized in that, The drive mechanism includes a manual drive mechanism and an electric drive mechanism. The manual drive mechanism is fixed at the end of the double - helix worm structure, and the electric drive mechanism is fixed on the balance base frame and forms a transmission connection with the double - helix worm structure. The double - helix worm structure is driven to rotate through the manual drive mechanism or the electric drive mechanism.

13. The control method of the shelf lifting device according to claim 12, characterized in that, The step of driving the transmission mechanism through the drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes: Judge whether the shelf lifting device is powered on; If so, drive the transmission mechanism through the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position; If not, drive the transmission mechanism through the manual drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position.

14. The control method of the shelf lifting device according to claim 13, characterized in that, In the step of obtaining the lifting instruction, when the obtained instruction is a rising instruction, the step of driving the transmission mechanism through the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes: Obtain the distance between the shelf to be moved and its adjacent upper shelf and the height of the objects stored on the shelf to be moved; Calculate the first height difference between the distance between the shelf to be moved and its adjacent upper shelf and the height of the objects stored on the shelf to be moved; Compare the first height difference with a rising preset value to obtain a first comparison result; Control the rising height of the balance base frame according to the first comparison result.

15. The control method of the shelf lifting device according to claim 14, characterized in that, Controlling the rising height of the balance base frame according to the first comparison result includes: If the first height difference is less than the rising preset value, controlling the rising height of the balance base frame to be the value of the first height difference; If the first height difference is greater than or equal to the rising preset value, controlling the rising height of the balance base frame to be the value of the rising preset value.

16. The control method of the shelf lifting device according to claim 13, characterized in that, In the step of obtaining the lifting instruction, when the obtained instruction is a descending instruction, the step of driving the transmission mechanism by the electric drive mechanism to drive the balance base frame and the shelf placed above the balance base frame to move to a predetermined height position includes: Obtaining the distance between the shelf to be moved and the adjacent lower shelf and the height of the object stored on the adjacent lower shelf of the shelf to be moved; Calculating the second height difference between the distance between the shelf to be moved and the adjacent lower shelf and the height of the object stored on the lower shelf; Comparing the second height difference with the descending preset value to obtain a second comparison result; Controlling the descending height of the balance base frame according to the second comparison result.

17. The control method of the shelf lifting device according to claim 16, characterized in that, Controlling the descending height of the balance base frame according to the second comparison result includes: If the second height difference is less than the descending preset value, controlling the descending height of the balance base frame to be the value of the second height difference; if the second height difference is greater than or equal to the descending preset value, controlling the descending height of the balance base frame to be the value of the descending preset value.

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