WO2021036435A1

WO2021036435A1 - Refrigerator having height-adjustable shelf

Info

Publication number: WO2021036435A1
Application number: PCT/CN2020/096951
Authority: WO
Inventors: 王仁华; 张树栋; 张秋菊; 申乃雨; 李利云
Original assignee: 海信（山东）冰箱有限公司
Priority date: 2019-08-30
Filing date: 2020-06-19
Publication date: 2021-03-04
Also published as: JP7020584B2; JP2022501562A; EP4023966A4; EP4023966A1

Abstract

Provided in the present disclosure is a refrigerator having a height-adjustable shelf, comprising: a height-adjustable shelf, a shelf driving mechanism and a shelf movement detection device. The shelf driving mechanism comprises: a driving motor and a gear transmission mechanism, the gear transmission mechanism comprising at least one set of transmission gears, the driving motor outputting a torque by means of a driving output shaft, the driving output shaft being provided with a first pulley; a guide rail, slidably connected to a support on the guide rail, the height-adjustable shelf being fixedly connected to the support; and a pulling cable disposed around the first pulley, one end of the pulling cable being fixedly connected to the support. The shelf movement detection device comprises: a movement switch, a trigger member being provided on the movement switch; and a linkage member, respectively cooperating with the movement switch and the transmission gears, wherein a position fixing member is provided on an inner gear surface of the transmission gear, and when the driving motor drives the transmission gear to rotate to the position fixing member and contact the linkage member, the linkage member triggers the trigger member of the movement switch.

Description

Refrigerator with lifting shelf

This disclosure requires a Chinese patent application to be submitted to the Chinese Patent Office on August 30, 2019, with an application number of 201910816671.8 and an invention title of "a refrigerator with a lifting shelf". It is required to be submitted to the Chinese Patent Office on August 30, 2019. The priority of a Chinese patent application whose application number is 201921432625.X and the invention title is "a refrigerator with a lifting shelf", the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the field of smart home appliances, in particular to a refrigerator with a lifting shelf.

Background technique

With the improvement of the quality of life, the occupancy rate of multi-door refrigerators with the characteristics of large volume, multiple functions, and classified storage is increasing, and people's requirements for the intelligentization of refrigerator products are getting higher and higher.

The shelf racks of existing refrigerator products are mostly shelf shelves with fixed positions. Usually, bladder ribs are formed on opposite sides of the refrigerator inner liner, and the layer racks can be placed on the bladder ribs. In order to facilitate the user to adjust, usually a number of ribs are reserved during the design of the refrigerator to adjust the position of the shelf. However, the height between the shelves cannot be adapted to the placement of items of different sizes, and the storage space has certain limitations. The space utilization rate inside the refrigerator is low, and many relatively large foods cannot be placed, which affects the user experience. In addition, in recent years, the demand for large-volume refrigerators has increased and the height of the refrigerator has increased. In this way, it is difficult to access the items in the uppermost shelf of the refrigerator and it has become a problem that plagues users.

Summary of the invention

A refrigerator with a lifting shelf, comprising: a storage room provided with a lifting shelf, a shelf driving mechanism for driving the lifting shelf to move up and down, and a maximum moving stroke for detecting the lifting shelf The layer frame stroke detection device, wherein the layer frame drive mechanism includes a drive motor and a gear transmission mechanism, the gear transmission mechanism includes at least one set of transmission gears, the drive motor outputs torque by driving an output shaft, and the drive A first pulley is provided on the output shaft; a guide rail fixed in the storage chamber, a support member slidably connected to the guide rail, and the lifting shelf is fixedly connected to the support member; and wound around the first pulley The other end of the traction rope is fixedly connected to the support; the strut detection device of the layer frame includes: a travel switch, and a trigger part is provided on the travel switch; a linkage member, the linkage members are respectively Cooperating with the travel switch and the transmission gear, a positioning portion is provided on the inner wheel surface of the transmission gear, and the driving motor drives the transmission gear to rotate until the positioning portion contacts the linkage member. The linkage member triggers the trigger part of the travel switch.

Description of the drawings

In order to explain the technical solutions of the present application more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those of ordinary skill in the art, without paying creative labor, Other drawings can also be obtained from these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not a limitation on the actual size of the products involved in the embodiments of the present disclosure.

Figure 1 is a refrigerator with an automatic lifting shelf provided by an embodiment of the present disclosure;

Figure 2 is a schematic diagram of a driving mechanism for an automatic lifting shelf provided by an embodiment of the disclosure;

Figure 3 is a perspective view of a refrigerator with an automatic lifting shelf in an embodiment of the disclosure;

4 is a schematic diagram of the three-dimensional structure of the driving mechanism of the lifting and lowering shelf in the embodiment of the disclosure;

5 is a schematic diagram of the installation structure of the drive motor in the embodiment of the disclosure;

6 is a diagram of the connection relationship between the traction rope, the first pulley and the motor mounting box in the embodiment of the disclosure;

7 is a schematic diagram of the fixed connection structure of the traction rope and the first pulley in the embodiment of the disclosure;

8 is a diagram of the connection relationship between the cover and the motor mounting box in the embodiment of the disclosure;

9 is a cross-sectional connection diagram of the cover and the motor mounting box in the embodiment of the disclosure;

Fig. 10 is a schematic diagram of a guide rail structure in an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of the structure of the lifting shelf in the embodiment of the disclosure;

Figure 12 is a diagram of the connection relationship between the lifting shelf and the support in the embodiment of the disclosure;

FIG. 13 is a schematic diagram of the driving mechanism of the shelf with the emergency stop device in the embodiment of the disclosure under normal working conditions;

FIG. 14 is a schematic diagram of the driving mechanism of a shelf with an emergency stop device in an embodiment of the disclosure when the shelf encounters an obstruction;

15 is a circuit diagram of a power supply commutation signal with an emergency stop device in an embodiment of the disclosure;

16A is a schematic structural diagram of the motor mounting box in an open state in an embodiment of the disclosure;

16B is a cross-sectional view of the motor mounting box in the embodiment of the disclosure;

FIG. 17A is a schematic structural diagram of the travel switch in an untriggered state in an embodiment of the disclosure; FIG.

FIG. 17B is a schematic diagram of the structure in a state where the limit switch is triggered in an embodiment of the disclosure; FIG.

18 is a schematic diagram of the structure of the transmission gear in the embodiment of the disclosure;

19 is a schematic cross-sectional view of the refrigerator compartment along the horizontal direction in the embodiment of the disclosure;

20 is another schematic cross-sectional view of the refrigerator compartment along the horizontal direction in the embodiment of the disclosure;

Figure 21 is a perspective view of a decorative board in an embodiment of the disclosure;

Figure 22 is a rear view of the decorative board in the embodiment of the disclosure;

FIG. 23 is a matching diagram of the decorative board and the shielding plate in the embodiment of the disclosure; FIG.

FIG. 24 is an exploded view of the shielding baffle in the embodiment of the disclosure;

25 is a state diagram of the shielding baffle when the shelf is at the lowest position in the embodiment of the disclosure;

FIG. 26 is a state diagram of the shielding baffle when the shelf is at the highest position in the embodiment of the disclosure; FIG.

FIG. 27 is a front and back view of the decorative board and the shielding plate when the shelf is at the lowest position in the embodiment of the disclosure; FIG.

FIG. 28 is a front and back view of the decorative panel and the shielding plate when the shelf is in the middle position in the embodiment of the disclosure; FIG.

Fig. 29 is a front and back view of the decorative panel and the shielding plate when the shelf is at the highest position in the embodiment of the disclosure.

detailed description

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be construed as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present disclosure can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 is a refrigerator with an automatic lifting shelf provided by an embodiment of the present disclosure; Fig. 2 is a schematic diagram of a driving mechanism of an automatic lifting shelf provided by an embodiment of the present disclosure. As shown in Figure 1 and Figure 2, the mechanism for driving the lifting and lowering of the shelf includes a screw 33 and a nut 34. The power part drives the screw 33 to rotate to realize the straight up and down movement of the nut 34; the nut 34 and the housing of the slider assembly 32 The body 321 is connected to drive the slider assembly 32 to move up and down along the guide rail 31. The power part includes a motor 35, a first rotating shaft 38, and a second rotating shaft 39. The output shaft of the motor 35 is connected to the first rotating shaft 38 through a belt 36 to drive the first rotating shaft 38 to rotate. One side of the first rotating shaft 38 passes through a worm gear The transmission mechanism transmits rotational movement to the screw rod 33 of a set of lifting mechanisms. This kind of automatic lifting device of the shelf is converted into linear motion by the motor driving the worm gear mechanism and the screw nut mechanism, and the structure is complicated. Both the worm gear mechanism and the screw nut mechanism occupy a large space, which affects the effective storage space of the storage room.

3 is a perspective view of a refrigerator with an automatic lifting shelf in an embodiment of the present disclosure; referring to FIG. 3, the refrigerator 1 has an approximate rectangular parallelepiped shape, and its appearance is composed of a storage room 100 defining a storage space and a plurality of doors arranged in the storage room 100 As defined by 200, the storage compartment 100 has an open box, which is formed by the storage compartment bladder, the storage compartment shell, and a foam layer located between the two. The storage compartment 100 is vertically partitioned into a lower freezing compartment 100A and an upper refrigerating compartment 100B. Each of the separated spaces may have an independent storage space.

In one embodiment, the freezer compartment 100A is defined at the lower side of the storage compartment 100 and may be selectively covered by the drawer-type freezer compartment door 200A. The space defined above the freezing compartment 100A is partitioned into left and right sides to respectively define the refrigerating compartment 100B. The refrigerating compartment 100B can be selectively opened or closed by a refrigerating compartment door 200B pivotally mounted on the refrigerating compartment 100B.

The storage compartment 100 in the embodiment of the present disclosure includes a storage drawer 101 located on the lower side. The storage drawer has two layers. It includes two dry and wet fresh-keeping drawers located on the lower layer, as well as two dry and wet fresh-keeping drawers located on the lower layer. A wider storage drawer on the upper side of the wet preservation drawer for storing longer ingredients; the storage room 100 also includes a shelf on the storage drawer 101; wherein the shelf includes a fixed shelf 102 and a lift Shelf 103; The fixed shelf 102 is a shelf that cannot move up and down after installation. Generally, bladder ribs are formed on the inner walls of both sides of the storage room 10, and the fixed shelf 102 is placed on the bile ribs. The elevating floor frame 103 is a floor frame that can be adjusted up and down after installation. Specifically, the elevating floor frame 103 moves up and down under the drive of the floor drive mechanism 300.

The relative position of the elevating floor frame 103 and the fixed floor frame 102 is not unique. The fixed floor frame 102 may be located on the upper side, or the elevating floor frame 103 may be located on the upper side. Preferably, in this embodiment, the lifting shelf 103 is located on the upper side, so that when the overall height of the refrigerator is high, when the user cannot store the food on the uppermost shelf, the lifting shelf 103 can be adjusted to move down to store the food. , It is convenient for users to use.

4 is a schematic diagram of the three-dimensional structure of the driving mechanism of the lifting shelf in the embodiment of the disclosure; FIG. 5 is a schematic diagram of the installation structure of the driving motor in the embodiment of the disclosure. As shown in Figures 4 and 5, the shelf drive mechanism 300 includes a guide rail 301 fixed in the storage room 100, a support 302 slidably connected to the guide rail 301, and the lifting shelf 103 and the support The member 302 is fixedly connected; it also includes a motor assembly that drives the supporting member 302 to lift. The motor assembly includes a drive motor 303 and a gear transmission mechanism. The drive motor 303 is decelerated by the gear transmission mechanism and is driven by the output shaft 313. Torque, the drive output shaft 313 is wound with a traction rope 304, and the other end of the traction rope 304 is connected to the support 302; when the lifting shelf 103 needs to move down, the output shaft 3031 of the drive motor 303 is controlled to move to the first Rotating in one direction, the traction rope 304 extends, and the elevating floor frame 103 moves downward under the action of gravity; when the elevating floor frame 103 needs to move upward, the output axis of the driving motor 303 is controlled to the second direction (the first The opposite direction of one direction) rotates, the traction rope 304 is gradually wound, and the lifting shelf 103 moves upward. Since the transmission mode of the layer frame drive mechanism adopts the traction rope traction mode, it has a simple structure and a smaller space occupation than the conventional worm gear mechanism and the screw nut mechanism to convert into linear motion.

In order to facilitate the user to control the lifting of the lifting shelf 103, as shown in FIG. 3, a shelf lifting control button 108 is provided on the side wall of the storage room 100, and the shelf lifting control button 108 is controlled by the user. The drive motor rotates forward, reverse or stops.

In a possible manner, the shelf lift control button 108 includes three buttons: an up button, a down button, and a stop button; the up button is located on the upper side with an upward arrow mark, and the stop button is located in the middle with a stop mark, and the down button is located in the middle. The button is located on the lower side with a downward arrow logo. In another way, the elevator control button 108 includes two buttons, namely an up/stop button and a down/stop button. The up/stop button is used to control the elevator 103 to rise or stop; The /stop button is used to control the lowering or stopping of the lifting shelf 103.

In a possible implementation manner, in the shelf drive mechanism 300, a guide rail 301 and a support 302 are respectively provided, the guide rail 301 is installed on the rear side wall of the storage room 100, and the support 302 It is fixedly connected to the middle and rear position of the lifting shelf 103; the driving motor 303 is arranged on the upper side of the guide rail 301. In this way, the traction distance of the traction rope 304 is shorter, the structure is simpler, and the production cost is lower. low. However, in this embodiment, the elevating shelf 103 is only supported and fixed by the intermediate position. If the weight difference of the items placed on both sides is large, the elevating shelf 103 may be inclined.

In a possible implementation, as shown in FIG. 4, in order to make the lifting shelf 103 move up and down more stably, the guide rails 301 are provided in two, which include a first guide rail 301A and a second guide rail 301B, respectively located at On opposite sides of the storage room 100, a first support 302A is slidably connected to the first guide rail 301A, and a second support 302B is slidably connected to the second guide rail 301B; On the rear side of the storage room 100, a first pulley 305 is fixed on the drive output shaft 313; the left and right sides of the storage room 100 are respectively provided with second pulleys 306 for changing the traction direction of the traction rope, two One ends of the traction ropes 304 are respectively fixed to the first pulley 305, the middle positions of the two traction ropes 304 respectively bypass the second pulley 306, and the other ends of the two traction ropes 304 are respectively fixed to the On the first support 302A and the second support 302B.

Specifically, as shown in FIG. 5, two annular pulley grooves 3053 are formed on the wheel surface of the first pulley 305, and the traction ropes 304 of the left and right support members 302 are respectively wound around the pulley grooves 3053. Inside.

The fixing method of the traction rope 304 and the first pulley 305 is not unique. In order to facilitate the disassembly and assembly of the traction rope 304, as a preference, as shown in FIGS. 6 and 7, the end surface of the first pulley 305 An insertion groove 3051 for fixing the end of the traction rope is provided. The traction rope 304 includes a rope body 3041 and a limit block 3042 located at one end of the rope body. The limiting groove 3051A matched with the position block 3042 and the connecting groove 3051B matched with the rope body 3041. The outer end of the connecting groove 3051B extends to the pulley groove of the first pulley 305.

Fig. 6 is a diagram of the connection relationship between the traction rope, the first pulley and the motor mounting box in the embodiment of the disclosure. In some embodiments, the traction rope adopts a steel wire rope structure, and the cross-sectional area of the stop block 3042 is larger than the cross-sectional area of the rope body 3041. Exemplarily, as shown in FIG. 6, the limiting block 3042 adopts a rectangular block structure with a larger cross section, which is welded and connected to the rope body as a whole.

In some embodiments, the limiting groove 3051A matches the shape and size of the limiting block 3042, the width of the connecting groove 3051B matches the diameter of the rope body 3041, and the connecting groove 3051B is in the same shape and size. The end surface of the first pulley 305 extends in an arc shape.

The driving motor 303 is installed in the motor mounting box 309, the driving output shaft 313 extends from the front side of the motor mounting box 309, and the first pulley 305 is fixedly connected to the driving output shaft 313 by screws.

FIG. 8 is a diagram of the connection relationship between the housing and the motor mounting box in the embodiment of the disclosure; FIG. 9 is a diagram of the cross-sectional connection relationship between the housing and the motor mounting box in the embodiment of the disclosure. As shown in Figures 8 and 9, the outer side of the motor mounting box 309 is provided with a cover 310 covering the first pulley 305. The cover 305 is threadedly connected to the motor mounting box 309, and the cover The shell 310 is provided with a mounting hole through which the traction rope 304 is inserted. In this way, in the front-rear direction, the stop block 3041 of the traction rope 304 is respectively restricted by the front end surface of the cover 310 and the motor mounting box 309 and will not slip out.

Fig. 10 is a schematic diagram of a guide rail structure in an embodiment of the present disclosure. As shown in Figure 10, the guide rail 301 is selected as a steel ball slide, the steel ball slide includes an outer rail 3011, an inner rail 3012, and a ball 3013 located between the two; the outer rail 3011 is fixed to the storage room 100 side wall, the support 302 is fixedly connected to the inner rail 3012. The above-mentioned steel ball slide rails can make the lifting shelf 103 move up and down only by overcoming the rolling friction. Under the same load, only a small driving force is needed to move the lifting shelf 103 up and down.

The fixed connection of the lifting shelf 103 and the support 302 is not unique, and it may be fixed by screw threads or by snap connection. FIG. 11 is a schematic diagram of the structure of the lifting shelf in the embodiment of the disclosure. As shown in FIG. 11, the lifting shelf 103 includes a shelf body 1031 and a shelf support frame 1032 for supporting the shelf body 1031, and the shelf support frame 1032 is fixedly connected to the shelf body 1031. On both sides of the lower part of the lower part, the rear side of the partition support frame 1032 is provided with a hook 1033; the support 302 is provided with a hanging hole 3021, as shown in FIG. 8, the hook 1033 of the partition support frame 1032 is hooked On the hanging hole 3021 of the support 302. This hooking method is highly reliable, and at the same time, it is convenient for the user to disassemble and clean the lifting shelf 103.

The connection between the support 302 and the traction rope 304 is not unique. In one embodiment, a connection hole is formed on the upper side of the support 302, and the traction rope 304 is directly connected to the connection hole. In this way, the support 302 fixes the lifting shelf 103 and the traction rope 304 at the same time, which requires a higher support capacity for itself. FIG. 12 is a diagram of the connection relationship between the lifting shelf and the support in the embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in FIG. 12, the upper side of the support 302 is provided with a traction rope fixing member 307, The traction rope fixing member 307 is fixedly connected to the inner rail 3012. The traction rope fixing member 307 and the support member 302 are independent of each other, and respectively support the elevating layer frame 103 and the traction rope 304, the supporting performance is easy to ensure, and the manufacturing and assembly are easy.

When the lifting shelf 103 moves up and down, there is a possibility that items will block the lifting shelf 103. At this time, it is necessary to immediately stop the lifting shelf 103 and continue to move to avoid the deflection of one side of the lifting shelf 103 causing the lifting layer The items on the shelf 103 are dumped. Therefore, the layer frame driving mechanism 300 further includes an emergency stop device for obstruction, which is used to control the driving motor to stop when the lifting layer frame encounters resistance when it rises or falls. In order to ensure the safety of the upward and downward movement of the lifting shelf 103, the emergency stop device includes a downward emergency stop device and an upward emergency stop device. The downward emergency stop device is used to ensure When the elevating shelf 103 moves down, it stops moving downward when encountering an object obstruction, and the upward emergency stop device is used to ensure that the elevating shelf 103 stops moving upward when encountering an object obstruction when moving up. Specifically, both the downward resistance emergency stop device and the upward resistance emergency stop device can be implemented by detecting the current of the drive motor 303. Specifically, the drive motor 303 is provided with a current sensor that detects the magnitude of the current. When the lifting shelf 103 encounters resistance when moving up or down, the current of the driving motor 303 changes suddenly. At this time, the controller controls the driving motor to stop running. In the above-mentioned emergency stop device in case of obstruction, since the start and stop of the drive motor is controlled by the threshold value of the current change, if the threshold value is not set reasonably enough, for example, when the setting is too large, the lifting shelf 103 cannot be stopped in time. The shelf 103 stops at a position where it should not stop.

FIG. 13 is a schematic diagram of the shelf drive mechanism with the emergency stop device in the embodiment of the disclosure under normal working conditions; FIG. 14 is the shelf drive mechanism with the emergency stop device in the embodiment of the disclosure when the shelf meets Schematic diagram in the case of resistance. In some embodiments of the present disclosure, in order to provide an emergency stop device that can more accurately control the lifting shelf 103 to stop when encountering resistance, as shown in FIG. 13 and FIG. The emergency stop device includes a micro switch 601 which is fixed on the rear wall of the refrigerating compartment 100B. The detection arm 6011 of the micro switch 601 is provided with an annular sleeve 6012 which is sleeved on the traction On the rope 304, preferably, the annular sleeve 6012 is sleeved on the traction rope section between the first pulley 305 and the second pulley 306. The traction rope 304 is under normal conditions, as shown in FIG. 13 As shown, because the lifting shelf 103 is under tension under the action of gravity, the detection arm 6011 of the micro switch 601 maintains the same position in the normal working state, and the circuit is in a normally closed state. When the lifting shelf 103 When 103 encounters obstacles while descending, as shown in Figure 14, the traction rope 304 changes from a tensioned state to a slack state. At this time, the position of the detection arm 6011 of the micro switch 601 changes from a normally closed state to a normally closed state. In the open state, at this time, the control unit cuts off the circuit, the driving motor 303 stops, and the lifting shelf 103 stops its descending movement. Since the position of the traction rope will change immediately when it encounters an obstacle, the micro switch 601 detects the position of the traction rope 304 to increase the response speed and improve the detection reliability.

15 is a circuit diagram of the power commutation signal of the emergency stop device in case of obstruction; including a power commutation chip 602, the power commutation chip 602 is used to switch the polarity of the output terminal according to the signal input information, and is located on both sides of the traction rope 304 The first micro switch 601A and the second micro switch 601B are connected in series with each other and then connected in parallel with the diode 603, and then connected in series with the driving motor 303 and then connected to the two output terminals of the power commutation chip 602, where the diode 603 The anode is connected to the driving motor 303, and the cathode of the diode 603 is connected to the power commutation chip 602.

Specifically, the input terminal of the power commutation chip 602 includes a +24V power interface and a GND terminal connected to the positive and negative electrodes of the 24V DC power supply, and a signal input terminal connected to the I/O port of the single-chip microcomputer to send a commutation signal; the power supply The two output terminals of the commutation chip are connected in series in the loop to provide a power signal for the emergency stop device in case of resistance. When the signal input terminal receives the commutation signal sent by the single-chip microcomputer, the power polarity of the two output terminals is reversed up and down (for example, from the upper end +24V and the lower end GND to the upper end GND and the lower end +24V).

When the lifting shelf is normally lowered, the two output terminals of the power reversing chip 602 are the upper end +24V and the lower end GND. At this time, the direction of the current in the loop is clockwise, and the current flows through the first micro switch 601A on the two traction ropes 304 And the second micro switch 601B, and then flow through the driving motor 303, and the driving motor 303 rotates to drive the lifting shelf 103 to descend. At this time, the lifting shelf 103 encounters obstacles during the descending process, which causes the traction rope 304 to become loose. One or both of the first micro switch 601A and the second micro switch 601B will be disconnected, so that the original circuit is cut off. The driving motor 303 stops rotating, and the lifting shelf 103 stops descending. At this time, pressing the down button again will not move the lifting shelf 103, but the lifting shelf 103 can be raised by pressing the up button. When the up button is pressed, after the single-chip microcomputer receives the button information, it sends a power commutation signal to the power commutation chip 602 through the signal input terminal, and the power commutation chip 602 two output ends of the power commutation, becoming the upper end GND lower end + 24V. At this time, the loop current becomes counterclockwise. Although the micro switch 601 (the first micro switch 601A and/or the second micro switch 601B) is disconnected, the current flows through the drive motor 303 and can be turned on again through the diode 603 , So the driving motor 303 rotates in the reverse direction, and the lifting shelf 103 rises. When the lifting shelf 103 rises for a certain distance, the two micro switches 601A/601B return to the on state, and the down button restores the function, and the up and down buttons can be used to freely control the rising and falling of the shelf.

Specifically, in order to further accurately control the moving position of the lifting shelf 103, the refrigerator further includes a shelf travel detection device 700, which is used to detect the highest and lowest movement of the lifting shelf. Stroke; the control device is used to control the start and stop of the drive motor according to the detection signal of the shelf stroke detection device 700. Wherein, in order to facilitate assembly installation, the drive motor 303, the gear transmission mechanism and the shelf travel detection device 700 are integratedly installed in the motor mounting box 309, and the motor mounting box 309 extends It is a drive output shaft 313 that outputs the torque of the drive motor 303. Wherein, the gear transmission mechanism may be provided with a two-stage or three-stage gear transmission mechanism according to the reduction ratio, and the gear transmission mechanism may be provided with a plurality of transmission gears 312.

FIG. 16A is a schematic structural diagram of the motor mounting box in an open state in an embodiment of the disclosure; FIG. 16B is a cross-sectional view of the motor mounting box in an embodiment of the disclosure. As shown in FIGS. 16A and 16B, the shelf travel detection device 700 includes: a travel switch 701, the travel switch 701 is provided with a trigger portion 7011; a linkage 702, the linkage 702 and the travel switch respectively 701 cooperates with the transmission gear 312, the inner wheel surface of the transmission gear 312 is provided with a positioning portion 3121, and the driving motor 303 drives the transmission gear 312 to rotate until the positioning portion 3121 is in contact with the linkage 702 At this time, the linkage 702 triggers the trigger portion 7011 of the travel switch 701.

Specifically, the transmission gear 312 may be any one of the gear transmission mechanisms that rotates no more than one revolution within the maximum stroke range of the lifting shelf 103, but is subject to the size of the stroke switch and the motor. The arrangement of the mounting box is restricted. In order to facilitate the installation, the travel switch is matched with the last-stage output gear where the drive output shaft is located to realize the triggering of the highest and lowest travel of the shelf.

Specifically, the limit switch 701 is clamped on one side surface of the motor mounting box 309, and its trigger part 7011 faces the other side surface of the motor mounting box 309. The linkage member 702 includes a central hinge portion 7021, which is swingably connected to the motor mounting box through the central hinge portion 7021, and the linkage member 702 further includes a first extension extending outward from the central hinge portion 7021. The arm 7022, the second extension arm 7023 and the third extension arm 7024, the second extension arm 7023 and the third extension arm 7024 are located on the same straight line, the first extension arm 7022 and the second extension arm 7023 and the first extension arm 7023 are located on the same straight line. The three extension arms 7024 are vertically arranged, and the linkage member 702 is T-shaped as a whole. Wherein, the first extension arm 7022 is used to cooperate with the transmission gear 312, the second extension arm 7023 is used to cooperate with the travel switch 701, and the linkage 702 is between the motor mounting box 309 A return spring 703 is provided, and the elastic force of the return spring 703 is suitable for pressing the linkage 702 against the trigger portion 7011 of the travel switch 701. More specifically, a positioning protrusion 7023A is formed on the opposite surface of the second extension arm 7023 and the mating surface of the travel switch 701, and one end of the return spring 703 is sleeved on the positioning protrusion 7023A, so The other end of the return spring 703 is sleeved on the convex rib on the motor mounting box 309.

Specifically, the positioning portion 3121 is a groove formed on the inner wheel surface of the transmission gear 312. When the first extension arm 7022 is matched with the groove, as shown in FIG. 17A, the linkage member 702 swings around the central hinge part 7021 until the second extension arm 7023 abuts on the trigger part 7011, so that the travel switch 701 is triggered; as shown in FIG. 17B, the first extension arm 7022 is connected to the trigger part 7011. When the transmission gear 312 is matched with other areas except for the groove, the linkage 702 swings around the middle hinge portion 7021 until the second extension arm 7023 is separated from the trigger portion 7011.

Two layer frame stroke detection devices are provided, and the two layer frame stroke detection devices are respectively triggered when the lifting shelf moves to the highest position and the lowest position. For example, when the transmission gear 312 rotates in the first direction, the lifting shelf 103 moves upward, and when one of the stroke detection devices is triggered by the transmission gear 312, the control device controls the driving motor 303 Stop, the lifting shelf 103 stops moving; when the transmission gear 312 rotates in a second direction opposite to the first direction, the lifting shelf 103 moves downward, when the other stroke detection device Triggered by the transmission gear 312, the control device controls the driving motor 303 to stop, and the lifting shelf 103 stops moving.

In order to reduce the space occupied by the storage room 100 by the shelf drive mechanism 300, as shown in FIG. 5, a motor mounting groove 106 is formed on the rear wall of the storage room 100, and a motor reinforcement iron 104 is provided on the inner side of the rear wall of the storage room 100. The motor mounting box 309 is fixed in the motor mounting slot 106.

Specifically, as shown in FIG. 8, the motor mounting box 309 is provided with connecting lugs, and the motor mounting box 309 is connected to the motor reinforcing iron 104 by bolts passing through the connecting lugs. The output shaft 3031 of the driving motor 303 is parallel to the rear wall of the storage compartment 100, which can further reduce the size of the motor mounting box 309 in the thickness direction.

19 is a schematic cross-sectional view of the refrigerator compartment along the horizontal direction in the embodiment of the disclosure; FIG. 20 is another schematic cross-sectional view of the refrigerator compartment along the horizontal direction in the embodiment of the disclosure. As shown in Figures 19 and 20, the left and right side walls of the storage room 100 are formed with guide rail installation grooves 107, and the inner sides of the left and right side walls of the storage room 100 are provided with guide rail reinforcement irons 105, which are installed in the guide rail installation grooves 107. The guide rail 301 is connected to the guide rail reinforcing iron 105 by bolts. In this way, the two larger parts of the shelf drive mechanism 300: the drive motor 303 and the guide rail 301 are both embedded in the installation groove on the inner wall of the storage chamber, and the entire shelf drive mechanism 300 occupies a small space.

In order to make the interior of the storage room 100 more beautiful and more integrated, it also includes a decorative structure covering the above-mentioned shelf drive mechanism 300. Specifically, when the refrigerator is a direct cooling refrigerator, when no air duct structure is provided inside the storage room 100, An integral panel may be used to cover the entire area where the layer frame driving mechanism 300 is located, and openings are provided on both sides of the panel, and the elevating layer frame 103 can move up and down along the opening.

In some embodiments of the present disclosure, the refrigerator 1 is an air-cooled refrigerator. As shown in FIGS. 19 and 20, an air duct assembly is provided on the inner wall of the rear side of the storage compartment 100, wherein the air duct assembly includes The air duct cover 401 and the air duct foam (not shown in the figure), the air duct foam is located on the rear side of the air duct cover 401 and passes through the air duct cover 401 and the rear wall of the refrigerator compartment With a snap connection, an air duct structure is formed inside the air duct foam, and a plurality of air outlets 402 are respectively provided on both sides of the air duct foam, and the air duct assembly is blown into the refrigerator compartment 100B through the plurality of air outlets 402 .

The decorative structure covering the layer frame driving mechanism 300 includes two parts, one of which is the air duct cover 401 covering the driving motor 303 and the upper half of the traction rope 304. Since the driving motor 303 is installed on the rear wall of the refrigerating compartment 100B, the air duct cover 401 can be skillfully used to cover the upper part of the driving motor 303 and the traction rope 304 to make the appearance of the refrigerating compartment better. The other part is a decorative board 501 covering the area where the guide rail 301 is located. The decorative board 501 is located on the left and right sides of the air duct cover 401, and the decorative board 501 is lifted and lowered into the shelf, as shown in Figs. 19 and 20, One end of the decorative plate 501 is clamped in the guide rail installation groove 107, and the other end is fixed on the rear wall of the refrigerating compartment 100B by two screws, and both sides of the air duct cover 401 can cover the decorative plate 501 In this way, the integrity of the storage room can be maintained, and the guide rails and pulley components are prevented from being exposed to the outside, and the storage items affect the lifting of the lifting shelf.

The decorative board 501 is provided with an air guiding surface 5014 at the air outlet 402 of the air duct assembly 400 for guiding the air outlet direction of the air duct assembly. Specifically, the air guide surface 5014 is inclined or inwardly recessed. The air guide surface 5014 is provided at the air outlet 402 to prevent the decorative plate 501 from blocking the air flow of the air duct assembly 400, thereby affecting the refrigeration of the refrigerator compartment. effect.

21 is a perspective view of the decorative board in an embodiment of the present disclosure; FIG. 22 is a rear view of the decorative board in an embodiment of the present disclosure; FIG. 23 is a mating diagram of the decorative board and a shielding board in an embodiment of the present disclosure. As shown in Figure 21, Figure 22, and Figure 23, the decorative board 501 is provided with a first opening 5011 extending up and down, and the shelf support frame 1032 of the lifting shelf 103 penetrates through the first opening 5011 The lifting shelf 103 can move up and down along the first opening 5011; in order to prevent sliding friction with the side wall of the first opening 5011 when the lifting shelf 103 moves up and down, the area of the first opening 5011 is set to be slightly larger To prevent the two from contacting, therefore, the shelf drive mechanism provided inside is exposed through the first opening 5011. When food in the refrigerator storage compartment enters the interior, the reliability of the shelf drive mechanism will be affected; therefore, the The decorative board 501 is provided with a shielding plate 502 on the side away from the lifting shelf 103, and the shielding plate 502 is provided with a second opening 50214 matching the size of the shelf support frame, and the shelf support frame is inserted On the second opening 50214, the shielding plate 502 can move up and down with the lifting shelf 103 and cover at least a part of the first opening 5011.

In this way, the shielding plate 502 can shield most of the area of the first opening 5011. When the lifting shelf 103 moves up and down, the shielding plate 502 moves accordingly, and the covering plate 502 will not affect the movement of the lifting shelf. The structure avoids the risk of internal and external communication leading to foreign objects inside. At the same time, it ensures the lifting reliability of the lifting shelf 103.

The fixed installation method of the shielding plate 502 is not unique. It can be independently slidably connected to the guide plate located on the rear side of the decorative board. In this way, since there is still a gap between the shielding plate 502 and the decorative board 501, The entry of foreign objects cannot be completely avoided. Therefore, in this embodiment, the shielding plate 502 is slidably connected to the rear surface of the decorative plate 501. Specifically, the decorative plate 501 is provided with a guide portion 5012, and the shielding plate 502 is slidably connected to the rear surface of the decorative plate 501. The guide portion 5012 is on.

The structure of the guide portion 5012 is not unique, and it only needs to realize the longitudinal sliding of the shielding plate 502 thereon. Preferably, as shown in FIG. 22, the guide portion 5012 is a plurality of L-shaped guide ribs formed on the decorative board 501, the L-shaped guide ribs are arranged in two rows along the longitudinal direction, and the shielding plates 502 are located in two rows. Row between the L-shaped guide ribs. In this manner, when the shielding plate 502 is installed, the L-shaped guide ribs can be moved outward to complete the installation, and the whole process is convenient and quick; and, since there are fewer sliding friction surfaces, the shielding plate 502 slides more smoothly.

In one of the embodiments, the shielding plate 502 is an integral plate structure whose length is greater than about 2 times the height of the first opening to ensure that when the lifting shelf 103 is at the lowest or highest position, the shielding plate 502 always covers the first opening. One opening 5011.

Since the lifting distance of the lifting shelf 103 is relatively large, if the shielding plate 502 is set as an integral plate, when it is moved down to the lowest position, the lower end of the shielding plate 502 protrudes downwards too much, which affects the fixing of the lower fixed shelf 102 , Or, when the lifting shelf 103 moves up to the highest position, the upper end of the shielding plate 502 protrudes upwards too much to top the top wall of the storage room; because, as shown in FIG. 24, the shielding plate 502 includes mutually slidingly connected The first shielding plate 5021 and the second shielding plate 5022, the second opening 50214 is disposed on the first shielding plate 5021, and the second shielding plate 5022 is located above and/or below the second opening 50214 Side; when the second shielding plate 5022 is located on the upper side of the second opening 50214, the decorative board 501 is provided with a high position limiting portion (not shown in the figure) that limits the highest position of the second shielding plate 5022; When the second shielding plate 5022 is located at the lower side of the second opening 50214, the decorative board 501 is provided with a low position limiting portion that limits the lowest position of the second shielding plate 5022.

In this way, by providing the first shielding plate 5021 and the second shielding plate 5022 that can slide relatively, when the lifting shelf 103 moves up, the upper limit portion restricts the highest position of the second shielding plate 5022, and the second shielding plate 5022 Slide to the inner side of the first shielding plate 5021 to avoid the risk that the second shielding plate 5022 continues to move upwards and cause the top wall of the storage room; when the lifting shelf 103 moves downwards, the lowest limit part restricts the second shielding At the lowest position of the plate 5022, the second shielding plate 5022 slides to the inner side of the first shielding plate 5021 to avoid the risk of the second shielding plate 5022 continuing to move downward and causing interference with the supporting device of the lower fixed shelf.

In a possible implementation, the high-position limiting portion or the low-position limiting portion 5013 is a limiting rib formed on the decorative board 501.

FIG. 24 is an exploded view of the shielding plate in the embodiment of the disclosure; FIG. 25 is a state diagram of the shielding plate when the shelf is at the lowest position in the embodiment of the disclosure; FIG. 26 is the shielding plate when the shelf is at the highest position in the embodiment of the disclosure Figure 27 is the front and back views of the decorative panel and the shield when the shelf is at the lowest position in the embodiment of the disclosure; Figure 28 is the front and back views of the decorative panel and the shield when the shelf is at the intermediate position in the embodiment of the disclosure And back view; Figure 29 is a front and back view of the decorative panel and the shielding plate when the shelf is at the highest position in the embodiment of the disclosure

In some embodiments of the present disclosure, as shown in FIGS. 23-29, the second shielding plate 5022 is located on the lower side of the second opening 50214 as an example to describe the relationship between the two and the working process. For those skilled in the art, the second shielding plate 5022 located on the upper side of the second opening 50214 has the same working principle, which will not be repeated here.

In order to further limit the sliding position of the second shielding plate 5022, the first shielding plate 5021 and the second shielding plate 5022 are respectively provided with a first limiting portion and a second limiting portion, as shown in FIG. 25, When the first shielding plate 5021 moves in a direction approaching the second shielding plate 5022, the first stopper and the low stopper can cooperate to restrict the second shielding plate 5022 to the first position. Position; as shown in Figure 26, when the first shielding plate 5021 moves away from the second shielding plate 5022, the second limiting portion can limit the second shielding plate 5022 to the second position.

Specifically, as shown in FIG. 24, the first shielding plate 5021 is provided with a sliding rib 50211 on the lower side of the second opening 50214, and the second shielding plate 5022 is provided with a sliding groove 50221 matching the sliding ribs. The first limiting portion includes a limiting protrusion 50213 provided at the upper end of the sliding rib, when the lower end surface of the second shielding plate 5022 is matched with the low limiting portion 5013, the limiting protrusion 50213 Cooperate with the upper end surface of the second shielding plate 5022 to limit the second shielding plate 5022 to the first position, see FIG. 25 for details; the second limiting portion includes a lower end of the sliding rib 50211 The first stop 50212 and the second stop 50222 provided at the upper end of the sliding groove 50221, the first stop 50212 and the second stop 50222 cooperate to limit the second shielding plate 5022 to the For the second position, see Figure 26 for details.

Figures 27-29 are structural diagrams of the front and rear sides of the decorative panel 501 when the elevating shelf 103 is from the lowest position to the middle position to the highest position; wherein, when the elevating shelf 103 is at the lowest position, as shown in Figure 27 , The second opening 50214 is located at the lowermost side, the second shielding plate 5022 slides to the inner side of the first shielding plate 5021, the lower end surface of the second shielding plate 5022 is matched with the lower limit part 5013, the The limiting protrusion 50213 cooperates with the upper end surface of the second shielding plate 5022 to limit the second shielding plate 5022 to the first position; when the lifting shelf 103 is in the middle position, as shown in FIG. 28 , The second opening 50214 is located in the middle position, the first shielding plate 5021 slides relative to the second shielding plate 5022, so that the second shielding plate 5022 is located outside the first shielding plate 5021, and the first stop The stop 50212 cooperates with the second stop 50222 to limit the second shielding plate 5022 to the second position; when the lifting shelf 103 is at the highest position, as shown in FIG. 29, the second opening 50214 is located at the highest position, and the first shielding plate 5021 drives the second shielding plate 5022 to move up to the highest position.

Specifically, the second shielding plate 5022 is provided with two T-shaped sliding grooves 50221, and the first shielding plate 5021 is correspondingly provided with two T-shaped sliding ribs 50211.

Obviously, the foregoing embodiments are merely examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the scope of protection created by this disclosure.

Claims

A refrigerator with a lifting shelf, which is characterized by comprising: a storage room provided with a lifting shelf, a shelf driving mechanism for driving the lifting shelf to move up and down, and a storage room for detecting the lifting shelf The maximum moving stroke of the shelf stroke detection device, of which,

The shelf drive mechanism includes a drive motor and a gear transmission mechanism, the gear transmission mechanism includes at least one set of transmission gears, the drive motor outputs torque by driving an output shaft, and a first pulley is provided on the drive output shaft; A guide rail fixed in the storage room, a support member slidably connected to the guide rail, and the lifting shelf is fixedly connected to the support member; and a traction rope wound on the first pulley, the traction rope The other end is fixedly connected with the support;

The shelf travel detection device includes: a travel switch, the travel switch is provided with a trigger part; a linkage, the linkage is respectively matched with the travel switch and the transmission gear, the inner wheel surface of the transmission gear A positioning part is provided on the upper part, and the driving motor drives the transmission gear to rotate until the positioning part contacts the linkage member, and the linkage member triggers the triggering portion of the travel switch.
The refrigerator with a lifting shelf according to claim 1, wherein the driving motor, the gear transmission mechanism and the shelf travel detection device are installed in a motor installation box.
The refrigerator with a lifting shelf according to claim 2, wherein the travel switch is clamped on a side surface of the motor mounting box, and the linkage is swingably connected to the motor mounting box, A return spring is provided between the linkage member and the motor mounting box, and the elastic force of the return spring is suitable for pressing the linkage member against the trigger portion of the travel switch.
The refrigerator with a lifting shelf according to claim 3, wherein the linkage includes a middle hinged part, and a first extension arm and a second extension arm extending outward from the middle hinged part, the first The extension arm is used for cooperating with the transmission gear, the second extension arm is used for cooperating with the travel switch, and the opposite surface of the second extension arm and the travel switch mating surface is formed to fix the reset The positioning protrusion of the spring.
The refrigerator with a lifting shelf according to claim 4, wherein the positioning portion is a groove formed on the inner wheel surface of the transmission gear, and the first extension arm is matched with the groove When the linkage member swings around the middle hinged portion until the second extension arm abuts against the trigger portion; when the first extension arm is matched with other areas of the inner wheel surface, the linkage member moves around The middle hinge part swings until the second extension arm is separated from the trigger part.
The refrigerator with a lifting shelf according to claim 4, characterized in that: the shelf stroke detection device is provided with two, and the two shelf stroke detection devices are moved to the highest position and the highest position on the lifting shelf respectively. The lowest position is triggered.
The refrigerator with a lifting shelf according to any one of claims 1-6, wherein the guide rail comprises a first guide rail and a second guide rail respectively fixed on opposite sides of the storage compartment, and the first guide rail A first support is slidably connected to the upper part, and a second support part is slidably connected to the second guide rail; the left and right sides of the storage room are respectively provided with second pulleys for switching the traction direction of the traction rope, One end of the rope is respectively fixed to the insertion groove of the first pulley, the middle positions of the two traction ropes respectively go around the second pulleys located on both sides of the storage room, and the other ends of the traction rope are respectively Fixed on the first support and the second support.
The refrigerator with a lifting shelf according to claim 1, characterized in that: the traction rope includes a rope body and a limit block located at one end of the rope body, and the end surface of the first pulley is provided for fixing The insertion groove at the end of the traction rope, the insertion groove includes a limit groove that cooperates with the limit block and a connection groove that cooperates with the rope body, and the free end of the connection groove extends to the The cross-sectional area of the limiting block on the pulley groove of the first pulley for winding the traction rope is larger than the cross-sectional area of the rope body.
The refrigerator with a lifting shelf according to claim 8, characterized in that: the shape and size of the limiting groove and the limiting block match, and the width of the connecting groove matches the diameter of the rope body , The connecting groove extends along an arc on the end surface of the first pulley.
The refrigerator with a lifting shelf according to claim 6, wherein the motor mounting box is provided with a cover covering the first pulley on the outer side, and the cover is threadedly connected to the motor mounting box , The housing is provided with a mounting hole through which the traction rope is inserted.