CN115875928A - Refrigerator with liftable shelf and lifting control method for the shelf - Google Patents

Abstract

The invention provides a refrigerator with liftable racks and a lifting control method of the racks, wherein the refrigerator comprises the following components: the refrigerator comprises a rack which can be arranged in a refrigerator body in a vertically movable mode and a lifting driving device for driving the rack to lift, and the lifting control method comprises the following steps: acquiring a lifting control instruction of a rack, and determining the lifting distance of the rack according to the lifting control instruction; detecting the load bearing load of the rack; determining the maximum lifting speed allowed within the lifting distance according to the bearing load; the lifting driving device is controlled to drive the rack to lift, and the speed of the rack is smaller than or equal to the highest lifting speed in the lifting process. The scheme of the invention gives consideration to the moving speed and the running stability, reduces the noise generated in the lifting process and improves the use experience of the lifting rack.

Description

Refrigerator with liftable shelf and lifting control method for the shelf

technical field

The invention relates to the technical field of refrigerators, in particular to a refrigerator with a liftable shelf and a lift control method for the shelf.

Background technique

Refrigerator is one of indispensable household appliances in people's daily life. With the continuous improvement of the quality of life, the uses and functions of refrigerators are also increasing. The storage items are not limited to fresh fruits and vegetables, but may also include medicines, daily necessities, beverages and other items that need to be refrigerated. Therefore, users also put forward more flexible demands on the size of the interior space of the refrigerator.

However, in traditional refrigerators, the internal space of the compartment is generally predetermined, which is difficult to meet the diverse requirements of users, and may lead to waste of space. In response to this problem, a shelf that can adjust the position has appeared in the refrigerator at present. One implementation of the above-mentioned adjustable shelf is to set a plurality of supporting parts in the box, and let the user select the supporting position of the shelf. This method is inconvenient to adjust and requires manual operation by the user.

In order to improve convenience, there is also an adjustable shelf that can be lifted and lowered automatically in the prior art. Although it can be lifted and lowered automatically, it is prone to problems of high noise and uneven lifting during actual use.

Contents of the invention

One object of the present invention is to improve the lifting stability of the liftable shelf.

A further object of the present invention is to reduce the noise generated during the raising and lowering of the rack.

Another further object of the present invention is to increase the reliability of the rack.

In particular, the present invention provides a lifting control method for a shelf in a refrigerator, wherein the refrigerator includes: a shelf that can move up and down in the refrigerator box, and a lifting drive device for driving the shelf to go up and down, And the lifting control method includes:

Obtain the lifting control instruction of the shelf, and determine the lifting distance of the shelf according to the lifting control instruction;

Detect the load-bearing load of the shelf;

Determine the maximum lifting speed allowed within the lifting distance according to the bearing load;

The lifting drive device is controlled to drive the shelf to go up and down, and the speed of the shelf is less than or equal to the maximum lifting speed during the lifting process.

Optionally, the maximum lifting speed decreases correspondingly with the increase of the bearing load.

Optionally, the step of detecting the bearing load of the shelf includes: using a weighing device provided on the shelf to weigh the storage items placed on the shelf to obtain the bearing load.

Optionally, the step of detecting the bearing load of the rack includes: using a torque measuring device provided in the lifting drive device to measure the torque that drives the rack up and down, so as to obtain the bearing load.

Optionally, the lifting drive device has two sets of driving equipment with motors respectively, and the two sets of driving equipment are used to support different positions of the shelf respectively, and torque measuring devices are respectively provided; the bearing load is measured according to the torque measuring devices of the two sets of driving equipment The torque is calculated.

Optionally, the process of controlling the lifting drive device to drive the shelf up and down also includes:

compare the torques measured by the torque measuring devices of the two sets of drive equipment;

When the torque difference measured by the two sets of torque measuring devices exceeds the preset unbalance ratio threshold, the maximum lifting speed is reduced.

Optionally, after comparing the torques measured by the torque measuring devices of the two sets of driving equipment, it further includes:

When the torque difference measured by the two sets of torque measuring devices exceeds the preset alarm threshold, the control of the lifting drive device to drive the shelf to go up and down is stopped.

Optionally, the step of controlling the lifting drive device to drive the shelf up and down also includes:

According to the lifting distance and the maximum lifting speed, the speed curve in the lifting process is determined, and the speed curve is used to specify the speed change in each section within the lifting distance.

Optionally, the lift control instruction of the shelf includes:

Operational control instructions received by the operating panel in the refrigerator; and/or

Voice control instructions obtained by the voice module in the refrigerator; and/or

The remote control instruction sent by the electronic terminal connected with the refrigerator data.

According to another aspect of the present invention, there is also provided a refrigerator with liftable shelves, which includes:

box;

The rack can be moved up and down in the cabinet;

a lift drive device configured to drive the shelf up and down; and

A controller, the controller includes a memory and a processor, wherein the memory stores a machine-executable program, and when the machine-executable program is executed by the processor, any method for controlling the shelf in the refrigerator is implemented.

In the refrigerator with a liftable shelf and the lifting control method for the shelf of the present invention, a liftable shelf is arranged in the refrigerator box, and the lifting drive device is used to control the lifting of the shelf. The maximum speed is limited to avoid unstable operation caused by excessive speed. The maximum lifting speed is set according to the load-bearing load of the shelf, taking into account the moving speed and running stability, while reducing the noise generated during the lifting process, and improving the experience of using the liftable shelf.

Furthermore, in the refrigerator with liftable shelves and the lift control method of the shelves of the present invention, the bearing load is detected by the weighing device and the torque measuring device, and the measurement is accurate and efficient, providing an accurate basis for the lift control.

Furthermore, the refrigerator with liftable shelves and the lifting control method of the shelves of the present invention can also determine whether the items placed on the shelves are balanced by detecting the torque measuring device in the drive device at different positions of the shelves , In the case of a large imbalance, the stability is improved by reducing the speed, and in the case of extreme imbalance, the lifting is stopped in time to ensure safety and reliability.

Furthermore, the refrigerator with a liftable shelf and the lifting control method of the shelf of the present invention have a stable lifting process and low noise, avoiding the impact caused by rapid lifting under high load-bearing conditions, and improving reliability and service life.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 is a structural schematic diagram of a cabinet in a refrigerator with liftable shelves according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a cabinet in a refrigerator with a liftable shelf according to another embodiment of the present invention;

Fig. 3 is a structural schematic diagram of a lifting drive device in a refrigerator with a liftable shelf according to an embodiment of the present invention;

Fig. 4 is a schematic block diagram of control components in a refrigerator with a liftable shelf according to an embodiment of the present invention;

5 is a schematic flowchart of a method for controlling the lifting of a shelf in a refrigerator according to an embodiment of the present invention; and

6 is a schematic flowchart of a method for controlling the lifting of a shelf in a refrigerator according to another embodiment of the present invention; and

Fig. 7 is a schematic flow diagram of the process of unbalanced force on two sets of driving devices in the method for controlling the lifting of the shelf in the refrigerator according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Fig. 1 is a structural schematic diagram of a box body 100 in a refrigerator 10 with a liftable shelf 200 according to an embodiment of the present invention. The refrigerator 10 may generally include a box body 100 in which one or more The storage compartment 110 can be configured as a refrigerated storage space, a frozen storage space, a variable temperature storage space, etc. according to the cooling temperature. Specifically, the quantity, function, and layout of the storage space can be configured according to requirements.

The box body 100 is provided with a shelf 200 and a lifting drive device 300 in one or more storage compartments 110, wherein the shelf 200 can be moved up and down in the box body 100, and generally can be a horizontally arranged shelf. An object board or similar load-bearing structure for supporting objects. The lifting drive device 300 is connected with the shelf 200, and is used to drive the shelf 200 up and down, and adjust the height of the shelf 200 up and down, so as to eliminate the restriction on the height direction of the storage space, so that the shelf 200 can be placed Items of different heights, thereby improving the space utilization rate of the storage compartment 110 .

In order not to affect the use of the storage space as much as possible and to facilitate the user's operation, the lifting drive device 300 in this embodiment may have two sets of drive devices each with a motor, and the two sets of drive devices are used to support different positions of the shelf respectively. In the embodiment shown in FIG. 1 , two sets of driving devices are respectively arranged on the left and right sides of the shelf 200 . The two sets of driving equipment run synchronously to ensure the stable lifting of the shelf 200.

Fig. 2 is a schematic structural diagram of a cabinet 100 in a refrigerator 10 with a liftable shelf 200 according to another embodiment of the present invention. In this embodiment, the lift driving device 300 is disposed on the back side of the storage compartment 110 . Two sets of driving devices are arranged at intervals on the rear side of the shelf 200 . The driving device needs to reliably support the shelf 200 and drive the shelf 200 synchronously and smoothly.

Fig. 3 is a structural schematic diagram of a lift driving device 300 in a refrigerator 10 with a liftable shelf 200 according to an embodiment of the present invention. The lifting drive device 300 can use a screw drive structure. Each set of driving equipment of the lifting driving device 300 includes a lead screw 310 , a fixing base 320 and a motor 330 . The lead screw 310 is arranged vertically, and the fixing seat 320 is screwed on the lead screw 310 . One side of the shelf 200 is fixedly connected to the fixing seat 320, and the connection method is not limited to welding, bolt connection and the like. The output shaft of the motor 330 is connected to the leading screw 310 . In this way, when the motor 330 rotates, the fixing base 320 can move up and down along the axis of the lead screw 310 , thereby driving the shelf 200 to rise and fall stably.

In some embodiments, in order to improve the connection strength between the shelf 200 and the fixed seat 320, a reinforcing rib 321 can also be provided between the shelf 200 and the fixed seat 320 to improve the load-bearing capacity of the shelf 200 and prevent The connection between the shelf 200 and the fixing seat 320 is broken due to too many items placed on the shelf 200 .

Considering that when the rack 200 is raised to the top of the lead screw 310 , if the rack 200 continues to rise, the fixing base 320 will be easily separated from the lead screw 310 , causing the rack 200 to fall. In order to solve this problem, in this embodiment, the top of each lead screw 310 is also fixedly connected with a limiting member 340, and the limiting member 340 is used to stop the fixing seat 320 when the fixing seat 320 rises to the top of the leading screw 310. , to prevent the fixing seat 320 from detaching from the top end of the lead screw 310 .

Alternatively, the lifting drive device 300 can also use a chain transmission structure. The chain transmission structure may include a transmission shaft and a chain. Two transmission shafts are arranged up and down, and gears are arranged at intervals on the transmission shafts. The transmission bars are all wound on the two transmission shafts arranged up and down, and meshed with the gears. The shelf 200 is fixed on the fixing piece provided on the chain. The motor drives the transmission shaft to rotate, so that the rack 200 moves with the chain.

Another alternative is that the lifting drive device 300 uses a rack and pinion transmission structure. The rack is arranged vertically, and the gear and the rack are meshed and rotated by the motor, so that the rack drives the rack 200 to lift.

Those skilled in the art can select the specific structure of the lifting drive device 300 according to needs, so as to meet the requirement of synchronously driving the shelf 200 to lift.

Fig. 4 is a schematic block diagram of control components in a refrigerator 10 with a liftable shelf 200 according to an embodiment of the present invention. The refrigerator 10 has a controller 400 and a load detection device 350 .

The controller 400 includes a memory 420 and a processor 410 , wherein the memory 420 stores a machine-executable program 421 , and when the machine-executable program 421 is executed by the processor 410 , any one of the methods for controlling the lifting of the rack above is implemented.

It should be noted that the logic and/or steps shown in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in combination with these Instructions are used to execute systems, devices, or equipment.

As far as the description of this embodiment is concerned, a "computer-readable medium" can be any program that can contain, store, communicate, spread or transmit programs for instruction execution systems, devices or devices or use in conjunction with these instruction execution systems, devices or devices installation.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the above-described embodiments, various steps or methods may be implemented by software or firmware stored in the memory 420 and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

The load detecting device 350 can be realized by using a weighing device provided on the shelf 200 or a torque measuring device provided in the lifting driving device 300 . The weighing device can weigh the storage items placed on the shelf 200 to obtain the bearing load of the shelf 200 . The torque measuring device is used to measure the torque that drives the shelf up and down, so as to obtain the bearing load of the shelf 200 . In the case that two sets of driving equipment are provided, the two sets of driving equipment can be provided with torque measuring devices respectively, and the bearing load of the shelf 200 can be calculated by superimposing the torque measuring devices of the two driving equipment. The above-mentioned bearing load reflects the weight of the storage items on the shelf 200 , because different weights have different influences on the driving of the lifting driving device 300 . Since weighing with a weighing device and measuring torque with a torque measuring device are well known to those skilled in the art, details of their construction will not be repeated here.

The lifting drive device 300 in this embodiment limits the maximum speed during the lifting process, so as to avoid unstable operation caused by excessive speed. The maximum lifting speed is set according to the load-bearing load of the shelf 200, taking into account the moving speed and running stability, while reducing the noise generated during the lifting process, and improving the experience of using the liftable shelf.

This embodiment also provides a lifting and lowering control method of the storage rack, which is executed by the above-mentioned controller 400 to achieve the above-mentioned effect of improving running stability.

Fig. 5 is a schematic flowchart of a method for controlling the lifting of a shelf in a refrigerator according to an embodiment of the present invention. The lift control method of the shelf includes:

Step S502, acquiring the lifting control instruction of the shelf, and determining the lifting distance of the shelf according to the lifting control instruction. The lifting control instruction of the shelf may include any one or more of the following: the operation control instruction received by the control panel in the refrigerator; and/or the voice control instruction obtained by the voice module in the refrigerator; Remote control instructions sent by electronic terminals.

For example, the user sets the target height of the shelf through the control panel of the refrigerator, and determines the rise or fall of the shelf and the moving height through the difference between the target height and the current height.

A voice module can also be set in the refrigerator, and the user can control the lifting instructions of the refrigerator shelf through voice. For example, after activating the voice control, the user can say a similar control voice such as "the shelf is raised by ten centimeters" to form a voice control command.

The refrigerator can also be connected to the mobile phone or other electronic terminals, and the user can send remote control instructions to the refrigerator through the electronic terminal connected to the refrigerator to control the lifting of the shelf.

In this embodiment, a corresponding interaction mode may be set according to the user's usage habits and manipulation convenience, so as to meet the needs of the user.

Before step S502, it may also be determined according to the operating state of the refrigerator whether to allow the shelf to be lifted or lowered. For example, the refrigerator may allow the shelf to be lifted and lowered only when the cabinet is in the open state, that is, the lifting function of the shelf is unlocked only in the open state.

Step S504, detecting the bearing load of the shelf.

The bearing load can be obtained by weighing the storage items placed on the shelf by using the weighing device arranged on the shelf. Alternatively, the bearing load can also be obtained by measuring the torque that drives the rack up and down by using the torque measuring device provided in the lifting drive device.

Step S506, determine the allowable maximum lifting speed within the lifting distance according to the bearing load; the maximum lifting speed is set to decrease correspondingly with the increase of the bearing load. The method of this embodiment limits the maximum lifting speed according to the bearing load, so as to avoid the decrease of stability and the increase of noise.

Step S508, controlling the lifting drive device to drive the shelf to lift, and make the speed of the shelf less than or equal to the maximum lifting speed during the lifting process. Considering that there is an acceleration and deceleration process in the lifting process of the shelf, in the lifting process, the speed curve during the lifting process can also be determined according to the lifting distance and the highest lifting speed, and the speed curve is used for each segment within the specified lifting distance. speed change. That is to say, the lifting process can predefine an acceleration phase, a speed stabilization phase, and a deceleration phase. Among them, the acceleration stage is the process from when the shelf moves from the static state to the speed increases to a stable value, the speed stabilization stage is the process that the shelf moves up and down at a stable speed, and the deceleration stage is the shelf from the stable speed to the arrival. Set the course of high stillness. Among them, the speed and temperature stage is the stage with the fastest moving speed of the shelf, and the speed of this stage can be set according to the highest lifting speed.

In addition, during the lifting process of the shelf, in the acceleration phase and deceleration phase, the acceleration can also be set according to the load, that is, the acceleration during the acceleration and deceleration process can also be set to decrease accordingly with the increase of the load , thereby reducing the impact on the lifting drive device due to the inertia being affected by the mass, thereby improving the reliability of the lifting drive device and reducing noise.

Fig. 6 is a schematic flowchart of determining the highest lifting speed in the method for controlling the lifting of the shelf in the refrigerator according to an embodiment of the present invention. The process includes:

Step S601, open the door of the refrigerator;

Step S602, prompting that the shelf can be lifted and lowered through the display panel or other human-computer interaction methods;

Step S604, determine the lifting mode and the lifting distance according to the user operation, wherein the lifting mode includes: rising or falling;

Step S606, determining the weight M of the item on the shelf, which corresponds to the load-bearing load of the shelf;

Step S608, judge whether the weight M of the item satisfies M≤5kg, if so, set the lifting speed V of the shelf to V=v1;

Step S610, determine whether the weight M of the item satisfies 5kg<M≤10kg, if so, set the lifting speed V of the rack to V=v2;

Step S612, judging whether the weight M of the item satisfies 10kg<M≤15kg, if so, set the lifting speed V of the shelf to V=v3;

Step S614, judging whether the weight M of the item satisfies 15kg<M≤20kg, if so, set the lifting speed V of the shelf to V=v4;

Step S616, determine whether the item weight M satisfies 20kg<M, if so, determine that the item on the rack is overweight, output an alarm signal, and prompt the user to reduce the amount of items placed on the rack.

In the above step S608 to step S616, v1, v2, v3, v4 are gradually decreasing values, and the noise generated by the motor can be reduced by adjusting the running speed of the shelf under different loads. The aforementioned weight thresholds of 5kg, 10kg, 15kg, and 20kg are all illustrative examples, and may be determined through pre-testing according to the structure and force strength of the shelf and the lifting drive device during actual implementation.

The lifting control method of this embodiment can further consider the uniformity of the items placed on the shelf, that is, to ensure that the shelf can bear a balanced force. In the case where two sets of driving equipment are used to support different positions of the shelf respectively, and torque measuring devices are respectively provided, the process of controlling the lifting driving device to drive the shelf up and down may also include: comparing the torque of the two sets of driving equipment The torque measured by the measuring device; when the torque difference measured by the two sets of torque measuring devices exceeds the preset unbalance ratio threshold, the maximum lifting speed is reduced. For example, if the torque difference measured by the torque measuring devices on the left and right sides of the shelf reaches more than 20%, it means that the item on the shelf is close to one side, and the maximum lifting speed needs to be reduced by 10%. This adjustment method not only takes into account the overall weight of the items on the shelf, but also takes into account the balance of the placement of the items, avoiding the increase in noise caused by unbalanced placement during the lifting process of the shelf, and preventing the noise caused by the up and down movement. The imbalance increases.

After comparing the torques measured by the torque measuring devices of the two sets of driving equipment, it may further include: when the difference between the torques measured by the two sets of torque measuring devices exceeds a preset alarm threshold, stop controlling the lifting drive device to drive the shelf up and down. The above-mentioned alarm threshold can be set to a value greater than the above-mentioned unbalance ratio threshold. When the torque difference measured by the two sets of torque measuring devices exceeds the preset alarm threshold, it can be considered that the area where the items are placed on the shelf is too concentrated, or too close to On one side, in this case, the shelf moves, which may cause the items to be placed unstable, or cause a serious unbalanced force on the lifting and lowering drive devices on both sides, resulting in a decrease in reliability.

Fig. 7 is a schematic flow diagram of the process of unbalanced force on two sets of driving devices in the lifting control method of the shelf in the refrigerator according to an embodiment of the present invention. The process includes:

In step S702, the lifting and lowering of the shelf starts;

Step S704, acquiring the torques N1 and N2 of the driving devices on the left and right sides;

Step S706, calculating the unbalance degree B of N1 and N2, the calculation method that can be used is:

B＝|N1-N2|/(N1+N2)

Step S708, judging whether the unbalance degree B satisfies 20%<B≤40%, if so, further reduce the lifting speed;

Step S710, judging whether the unbalance degree B satisfies 40%<B, if so, determine that the weight of the items on the shelf is overweight, output an alarm signal, prompt the user to rearrange the items, try to place the items evenly or place the items in the center of the shelf Location;

Step S712, lifting and lowering according to the speed determined by the bearing load.

The calculation method of the above-mentioned unbalance degree and the thresholds of 20% and 40% are illustrative examples, and may be determined through pre-testing according to the structure and stress strength of the shelf and the lifting drive device during actual implementation.

After actual testing, the refrigerator with a liftable shelf and the lifting control method of the shelf in this embodiment can achieve a stable lifting process and low noise, and avoid the impact caused by rapid lifting under high load-bearing conditions , improved reliability and service life.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A lifting control method of a rack in a refrigerator, wherein the refrigerator comprises: the refrigerator comprises a rack which is arranged in a refrigerator body in a vertically movable mode and a lifting driving device for driving the rack to lift, and the lifting control method comprises the following steps:

acquiring a lifting control instruction of the rack, and determining the lifting distance of the rack according to the lifting control instruction;

detecting a load bearing load of the rack;

determining the allowable lifting maximum speed within the lifting distance according to the bearing load;

and controlling the lifting driving device to drive the rack to lift, and enabling the speed of the rack to be less than or equal to the highest lifting speed in the lifting process.

2. The method of controlling lifting of a rack in a refrigerator according to claim 1, wherein

The peak lifting speed decreases with increasing load bearing load.

3. The method of controlling lifting of a rack in a refrigerator according to claim 1, wherein the step of detecting a load bearing load of the rack comprises:

and weighing the stored objects placed on the rack by using a weighing device arranged on the rack to obtain the bearing load.

4. The method of controlling lifting of a rack in a refrigerator according to claim 1, wherein the step of detecting a load bearing load of the rack comprises:

and measuring the torque for driving the rack to lift by using a torque measuring device arranged in the lifting driving device so as to obtain the load-bearing load.

5. The method of controlling ascending and descending of a rack in a refrigerator according to claim 4, wherein

The lifting driving device is provided with two sets of driving equipment which are respectively provided with a motor, the two sets of driving equipment are used for respectively supporting different positions of the rack and are respectively provided with the torque measuring device;

and the load-bearing load is calculated according to the torques measured by the two sets of torque measuring devices of the driving equipment.

6. The method of controlling ascending and descending of a rack in a refrigerator according to claim 5, wherein

The process of controlling the lifting driving device to drive the rack to lift also comprises the following steps:

comparing the torques measured by the torque measuring devices of the two sets of driving equipment;

and when the torque difference measured by the two torque measuring devices exceeds a preset unbalance proportion threshold value, reducing the highest lifting speed.

7. The method of controlling lifting of a rack in a refrigerator according to claim 6, further comprising, after comparing the torques measured by the torque measuring means of the two sets of the driving apparatuses:

when the torque difference measured by the two torque measuring devices exceeds a preset alarm threshold value, the lifting driving device is stopped to control the lifting driving device to drive the rack to lift.

8. The method of controlling the lifting of the rack in the refrigerator according to claim 1, wherein the step of controlling the lifting driving means to lift the rack further comprises:

and determining a speed curve in the lifting process according to the lifting distance and the lifting maximum speed, wherein the speed curve is used for specifying the speed change in each section in the lifting distance.

9. The ascending and descending control method of a rack in a refrigerator according to claim 1, wherein the ascending and descending control command of the rack includes:

an operation control instruction received by an operation panel in the refrigerator; and/or

A voice control instruction is acquired by a voice module in the refrigerator; and/or

And the remote control instruction is transmitted by the electronic terminal in data connection with the refrigerator.

10. A refrigerator having a liftable rack, comprising:

a box body;

the rack is arranged in the box body in a vertically movable manner;

the lifting driving device is configured to drive the rack to lift; and

a controller comprising a memory and a processor, wherein the memory stores a machine executable program which when executed by the processor implements the method of controlling the lifting of a rack in a refrigerator according to any one of claims 1 to 9.

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