TWM670578U - Freezer Structure - Google Patents

Abstract

The present invention proposes a freezer structure, in which an automatic lifting device is arranged between the outer shell and the inner box of the freezer, and the structure includes: a storage rack, a movable rack and a lifting drive unit. The storage rack is used to carry food or articles, and a hanging ear is respectively arranged on the opposite sides of the top of the storage rack. The movable rack is arranged on the outer side of the inner box and between the outer shell and the inner box. The movable rack is equipped with a bearing rod, and the hanging ear of the storage rack can be hung on the bearing rod. The lifting drive unit is used to drive the movable rack to rise or fall, thereby lifting the storage rack upward and leaving the inner box, or putting the storage rack into the inner box; the user can conveniently take the food or articles placed on the bottom layer of the storage rack.

Description

Freezer structure

The present invention relates to the structure of a refrigerator, in particular to the structure of a freezer.

Existing freezers can be divided into two categories, namely horizontal freezers and upright freezers. Upright freezers are similar to common household refrigerators, with narrower bodies and smaller floor space. Food or items are placed in layers using shelves or drawers. The advantage is that the food or items are clearly displayed and easy to access, and most of them have the function of no defrosting, but the price is slightly higher than that of horizontal freezers.

In contrast, horizontal freezers require a larger area, food or items are placed in layers, and they need to be manually defrosted after a period of use, otherwise the food or items stored at the bottom will be frozen and difficult to take out; compared with upright freezers, the advantage of horizontal freezers is that the price-performance ratio (CP value) is higher, but The deeper and larger cold layer space of the horizontal freezer will make it more difficult to take out the stacked food or items, especially the food or items placed at the bottom of the freezer. When there are more food or items stacked, it will become difficult to find the food or items. Therefore, it often happens that the food is stored for too long and exceeds the shelf life, resulting in waste.

The technical problem to be solved by this novel invention is to provide a freezer that is convenient for taking out frozen items and for classifying and storing food or items.

In order to solve the above technical problems, a preferred embodiment of the structure of the new freezer includes: an outer shell, an inner box, a refrigeration system and an electrical control system; the inner box is arranged inside the outer shell, there is a gap between the inner side wall of the outer shell and the outer side wall of the inner box, the outer shell has an opening connected to the inside of the inner box, and the opening is provided with a cabinet door, the electrical control system has a control circuit, the control circuit is electrically connected to the refrigeration system, and is used to control the operation of the refrigeration system; it is characterized in that: it further includes an automatic lifting device, the structure of the automatic lifting device includes:

A storage rack that can be freely placed into the inner box from top to bottom and taken out from the inner box from bottom to top. Two opposite sides of the top of the storage rack are respectively provided with a hanging ear;

A movable rack is arranged on the outer side of the inner box and in the gap between the inner side wall of the outer shell and the outer side wall of the inner box. The movable rack is equipped with a bearing rod, which is placed on the top of the inner box. The hanging ears of the storage rack can be hung on the bearing rod. The movable rack can drive the storage rack to move vertically to a first position at the lowest and a second position at the highest. When the movable rack rises to the second position, the storage rack is lifted up and leaves the inner box. When the movable rack descends to the first position, the storage rack is placed in the inner box; and

A lifting drive unit is disposed inside the outer shell. The lifting drive unit is electrically connected to the control circuit of the electrical control system. The lifting drive unit is connected to the movable frame. The control circuit is electrically connected to a lifting control interface. The control circuit controls the lifting drive unit to drive the movable frame to rise to the second position and to drive the movable frame to descend to the first position according to the user's operation on the lifting control interface.

As a preferred embodiment of the present invention, there is a distance between the storage rack and the inner side wall of the inner box.

As a preferred embodiment of the present invention, the supporting rods are two, namely a first supporting rod and a second supporting rod. The first supporting rod and the second supporting rod are placed on top of the inner box. The first supporting rod and the second supporting rod are respectively close to the two sides of the inner box. After the storage rack is placed in the inner box, the storage rack can be hung on the first supporting rod and the second supporting rod respectively by the hanging ears.

As a preferred embodiment of the present invention, it further includes: a fixed rail, which is a linear rail, fixedly arranged on the inner wall of the outer shell, and extends in the vertical direction; a movable rail arranged on the movable frame, which can be coupled with the fixed rail, and the movable frame can move to the first position and the second position in the vertical direction by the guidance of the movable rail and the fixed rail.

As a preferred embodiment of the present invention, the movable frame includes: a plurality of vertical poles, which are respectively arranged on the outer side of the inner box, and the positions of the vertical poles respectively correspond to the positions of a fixed guide rail, and each vertical pole is equipped with a movable guide rail.

As a preferred embodiment of the present invention, the movable frame includes: a first upright pole, a second upright pole, a third upright pole and a fourth upright pole, each of which is provided with a movable rail; the fixed rail includes a first fixed rail, a second fixed rail, a third fixed rail and a fourth fixed rail; the first upright pole and the second upright pole are located at the front side of the inner box, and the third upright pole is provided with a movable rail. and the fourth vertical rod are located on the back side of the inner box; the first fixed rail and the second fixed rail are fixedly configured on the inner side wall of the front side of the outer shell, and the first fixed rail and the second fixed rail are respectively coupled to the movable rails of the first vertical rod and the second vertical rod; the third fixed rail and the fourth fixed rail are fixedly configured on the inner side wall of the back side of the outer shell, and the third fixed rail and the fourth fixed rail are respectively coupled to the movable rails of the third vertical rod and the fourth vertical rod;

The bearing rods are composed of two, namely a first bearing rod and a second bearing rod. The two ends of the first bearing rod are connected to the tops of the first and third upright rods, respectively, and the two ends of the second bearing rod are connected to the tops of the second and fourth upright rods, respectively. The first bearing rod and the second bearing rod are placed on top of the inner box. The first bearing rod and the second bearing rod are close to the two sides of the inner box, respectively. After the storage rack is placed in the inner box, the storage rack can be hung on the first bearing rod and the second bearing rod respectively by the hanging ears.

As a preferred embodiment of the present invention, the lifting drive unit is a reciprocating screw drive mechanism, which includes: a motor, a lead screw, a nut support and a screw support seat, wherein the nut support is fixed to the movable frame, the screw support seat is fixed to the inner side wall of the front side of the outer shell, the motor is arranged inside the outer shell and close to its bottom, and the motor is connected to one end of the lead screw for driving the lead screw to rotate; the screw passes through the nut support, and the other end of the lead screw is rotatably connected to the screw support seat. The motor is electrically connected to the control circuit, and the control circuit controls the operation of the motor, thereby driving the lead screw to drive the movable frame to rise to the second position, or drive the movable frame to descend to the first position.

As a preferred embodiment of the present invention, the lifting drive unit is any one of a reciprocating hydraulic drive system, a reciprocating hydraulic drive system, a reciprocating chain drive system and a reciprocating steel cable drive system.

As a preferred embodiment of the present invention, the housing is equipped with a position detector, and the control circuit is electrically connected to the position detector. The control circuit detects whether the cabinet door is opened to the preset correct position through the position detector. When the cabinet door is opened to the correct position, the position detector will be triggered, and the control circuit will control the lifting drive unit to operate.

The advantages and effects of the present invention are as follows: the freezer proposed in the present invention is equipped with an automatic lifting device, and the user can operate the lifting control interface to control the action of the lifting drive device, and use the lifting drive device to drive the movable rack and the storage rack to rise or fall in the freezer; when the storage rack rises, the food or items stored in the storage rack can be lifted up and leave the inner box, so that the user can easily take the food or items placed on the bottom layer of the storage rack; conversely, when the storage rack is lowered, the storage rack and the food or items stored in it can be put into the inner box together.

On the other hand, the new model is equipped with a position detector. If the freezer door is not opened to the correct position, even if the user operates the lifting control interface, the control circuit will not control the lifting drive unit to operate, thereby providing a reliable safety mechanism to avoid failure or damage.

The specific implementation method, technical features and effects of this new model will be described below with accompanying drawings.

10: Shell

11: Open mouth

12: Cabinet door

13: Hinge

14: Position detector

20: Inner box

30: Compressor

31: Temperature detector

32: Control Panel

33: Temperature control interface

34: Display

35: Lift control interface

36: Control circuit

40: Storage rack

41:Hanging ears

42: Shelf

50: Movable rack

51: Loading rod

511: First load bearing rod

512: Second bearing rod

521: First stand

522: Second stand

523: Third pole

524: Fourth Stand

53: Support rod

60: Lifting drive unit

61: Electric motor

62: Lead screw

63: Nut support

64: Screw support seat

70: Fixed rail

701: First fixed rail

702: Second fixed rail

703: Third fixed rail

704: Fourth fixed rail

80:Activity track

Figure 1 is a schematic diagram of a preferred embodiment of the structure of the new freezer.

Figure 2 is a partial structural exploded view of the embodiment of Figure 1.

Figure 3 is a schematic diagram of the cross-sectional structure of the embodiment of Figure 1.

Figures 4 to 6 are schematic diagrams of the continuous operation of the structure of the new freezer.

Figure 7 is a functional block diagram of the electrical control system of the new freezer structure.

Figure 8 is a schematic diagram of another preferred embodiment of the structure of the new freezer.

In the embodiments disclosed in the patent specification and drawings of the present invention, the directions mentioned therein (such as up, down, left, right, front and back) are based on the contents shown in the drawings and are used to illustrate the relative relationships (such as positional relationships, connection relationships and action relationships) between the various elements or structures in the embodiments. In principle, when the positions of the elements or structures mentioned in the specification of the present invention are consistent with those shown in the drawings, the directions mentioned will be appropriate. If the positions of the elements or structures mentioned in the specification of the present invention are changed, the directions mentioned should also be changed accordingly. The embodiment structure of the new type of diagram, The relative position relationship of some structures or components may be difficult to distinguish due to the overlapping of the viewing angle of the composition. Some structures will be ignored and not drawn in the diagram. This is not an error in the diagram composition. The composition of each structure or component and its relative position and relationship should be understood by referring to the content of all the diagrams.

First, please refer to Figures 1, 2 and 3, which are schematic diagrams, partial structural decomposition diagrams and cross-sectional structural diagrams of a preferred embodiment of the structure of the new freezer. The preferred embodiment of the freezer proposed in the present invention includes: an outer shell 10, an inner box 20, an automatic lifting device (see Figure 2), a refrigeration system and an electrical control system.

The outer shell 10 is usually made of metal, and the inner box 20 is arranged inside the outer shell 10. There is a gap between the inner side wall of the outer shell 10 and the outer side wall of the inner box. A heat insulating material (not shown in the figure) is usually filled between the inner side wall of the outer shell 10 and the outer side wall of the inner box 20. The inner box 20 is generally made of ABS or HIPS board by vacuum forming, and the heat insulating material widely used is polyurethane foam material. The inner box 20 is basically a box structure with an opening facing upwards. The inner box 20 has upright side walls and a bottom plate. The inner hollow part of the inner box 20 is used as a storage space for food or items. The outer shell 10 has an opening 11 facing upwards and is connected to the inner part of the inner box 20. The opening 11 of the outer shell 10 is provided with a door 12 for closing the opening. One embodiment of the door 12 is a flip-up design (see Figure 1). One side of the door 12 is connected to the back side of the outer shell 10 by a hinge 13. The inner box 20 can be exposed by flipping the door 12 upwards.

The refrigeration system includes: a compressor 30, a condenser, a capillary tube and an evaporator (the refrigeration system is a prior art and is not shown in detail in the diagram); the refrigeration system generally uses a refrigerant as a refrigerant, and the compressor drives the refrigerant to circulate between the condenser and the evaporator, thereby causing the refrigerant to absorb heat in the evaporator and then release heat in the condenser. The heat absorption of the evaporator is used to generate a low-temperature environment in the inner box, thereby forming a low-temperature storage space in the inner box 20 for storing food or items that need to be stored at a low temperature.

Please refer to Figure 7. The electrical control system includes: a temperature detector 31, a control panel 32 (generally provided with a power switch and a function mode button), a temperature control interface 33 (such as a knob or a button) for controlling the temperature, a display 34 for displaying the temperature and the operating information of the freezer, a lifting control interface 35 (such as a button) and a control circuit 36. The control circuit 36 is electrically connected to the refrigeration system and the above-mentioned temperature detector 31, control panel 32, temperature control interface 33, display 34 and lifting control interface 35. The control circuit is used to control the operation of the refrigeration system and the automatic lifting device. The control panel 32, temperature control interface 33, display 34 and lifting control interface 35 are all arranged on the outside of the outer shell 10 for the user to operate and read the operation information and temperature of the freezer.

Please refer to Figure 2, the preferred embodiment of the automatic lifting device includes: a storage rack 40, a movable rack 50, and a lifting drive unit 60.

The top of the storage rack 40 is provided with hanging ears 41 on opposite sides. The storage rack 40 is used to carry food or articles. The storage rack 40 and the food or articles stored therein can be freely put into the inner box 20 from top to bottom, and taken out from the inner box 20 from bottom to top. In a preferred embodiment, there is a distance between the storage rack 40 and the inner side wall of the inner box 20 to prevent the storage rack 40 from freezing in the inner box 20.

A preferred embodiment of the storage rack 40 includes a plurality of shelves 42 located at different heights, each shelf 42 is used to carry food or items, forming a multi-layer storage rack. FIG. 2 shows a three-layer storage rack, and other embodiments may also be a single-layer storage rack 40. Preferably, the shelves 42 are drawer-type structures, so the shelves 42 can be freely taken out of and put into the storage rack 40, which is convenient for users to freely adjust and use the storage space of the storage rack 40.

The movable frame 50 is disposed on the outer side of the inner box 20 and in the gap between the inner side wall of the outer shell 10 and the outer side wall of the inner box 20. The movable frame 50 is provided with a supporting rod 51 for supporting the storage rack 40. The supporting rod 51 is placed on the upper part of the inner box 20. The hanging ears 41 of the storage rack 40 can be hung on the supporting rod 51. The movable frame 50 is used to drive the storage rack 40 to move vertically to a first position (see FIG. 4) at the lowest position and a second position (see FIG. 6) at the highest position. When the movable frame 50 rises to the second position, the storage rack 40 is lifted upward and leaves the inner box 20. When the movable frame 50 descends to the first position, the storage rack 40 is placed in the inner box 20. It should be noted that the preferred implementation of the movable frame 50 is to be located outside the insulation material or to avoid the insulation material, and the movable frame 50 needs to be able to move freely up or down on the outside of the inner box 20.

The lifting drive unit 60 is disposed inside the housing 10. The lifting drive unit 60 is electrically connected to the control circuit 36 of the electrical control system. The lifting drive unit 60 is connected to the movable frame 50. The control circuit 36 is electrically connected to the lifting control interface 35. The control circuit 36 controls the lifting drive unit 60 to drive the movable frame 50 to rise to the second position and to drive the movable frame 50 to descend to the first position according to the user's operation on the lifting control interface 35.

In a preferred embodiment, the automatic lifting device further includes: a fixed rail 70 and a movable rail 80; as shown in Figures 2 and 3, the fixed rail 70 is a linear rail, and the fixed rail 70 is fixedly arranged on the inner wall of the outer shell 10, and the fixed rail 70 extends along the vertical direction. The movable rail 80 is arranged on the movable frame 50, and the movable rail 80 can be coupled with the fixed rail 70. The movable frame 50 can be moved in the vertical direction to a lowest first position and a highest second position by the guidance of the movable rail 80 and the fixed rail 70.

A preferred embodiment of the supporting rod 51 of the movable frame 50 includes: a first supporting rod 511 and a second supporting rod 512, the first supporting rod 511 and the second supporting rod 512 are placed on the top of the inner box 20 (see Figure 1), the first supporting rod 511 and the second supporting rod 512 are respectively close to the two sides of the inner box 20, and after the storage rack 40 is placed in the storage space of the inner box 20, the storage rack 40 can be hung on the first supporting rod 511 and the second supporting rod 512 by the hanging ears 41; when the movable frame 50 rises to the second position, it can be The storage rack 40 is lifted upward, so that the storage rack 40 and the food or articles stored therein are lifted upward and away from the inner box 20, so that the user can conveniently take the food or articles placed on the bottom layer of the storage rack 40; conversely, when the movable rack 50 is lowered to the first position, the storage rack 40 and the food or articles stored therein can be placed into the inner box 20; the user can also control the lifting drive unit 60 to drive the movable rack 50 and the storage rack 40 to rise or fall and stop at the desired height by operating the lifting control interface 35 (see Figures 4 to 6).

In a preferred embodiment of the present invention, a position detector 14 is disposed on the housing 10. The position detector 14 can use, for example, limit switches. In a preferred embodiment, the position detector 14 is disposed on the hinge 13 of the cabinet door 12 (see FIG. 3 ). The control circuit 36 is electrically connected to the position detector 14. The control circuit 36 detects whether the cabinet door 12 is opened to a preset correct position through the position detector 14. The so-called correct position means that the position of the cabinet door 12 opening will not prevent the movable rack 50 and the storage rack 40 from rising normally to the second position (as shown in FIG. 4 to FIG. 6 ). In other words, when the cabinet door 12 is opened to the correct position, the position detector 14 will be triggered, and the control circuit 36 will control the lifting drive unit 60 to operate; on the contrary, if the cabinet door 12 is not opened to the correct position, the position detector 14 cannot be triggered. At this time, even if the user operates the lifting control interface 35, the control circuit 36 will not control the lifting drive unit 60 to operate, thereby providing a reliable safety machine to avoid failure or damage.

In other embodiments, the cabinet door 12 is a sliding door design. Generally, a track is set at the edge of the opening 11 of the outer shell 10, and the cabinet door 12 is slidably arranged on the track. Similarly, for the cabinet door 12 of this sliding door design, the position detector 14 can be arranged at the edge of the opening 11 of the outer shell 10 to detect the position of the cabinet door 12.

A preferred embodiment of the movable frame 50 includes: a plurality of vertical rods are respectively arranged on the outer side of the inner box 20, and the plurality of vertical rods are respectively arranged at positions corresponding to a fixed guide rail 70, and each vertical rod is equipped with a movable guide rail 80; as shown in FIG. 2, a preferred embodiment, the plurality of vertical rods include a first vertical rod 521, a second vertical rod 522, a third vertical rod 523 and a fourth vertical rod 524, and the first vertical rod 521, the second vertical rod 522, the third vertical rod 523 and the fourth vertical rod 524 are respectively equipped with a movable guide rail 80; wherein the first vertical rod 521 and the second vertical rod 522 are located at the outer side of the inner box 20. On the front side, the third vertical rod 523 and the fourth vertical rod 524 are located on the back side of the inner box 20; the first fixed rail 701 and the second fixed rail 702 are fixedly configured on the inner side wall of the front side of the outer shell 10, and the first fixed rail 701 and the second fixed rail 702 are respectively coupled to the movable rail 80 of the first vertical rod 521 and the second vertical rod 522, and the third fixed rail 703 and the fourth fixed rail 704 are fixedly configured on the inner side wall of the back side of the outer shell 10, and the third fixed rail 703 and the fourth fixed rail 704 are respectively coupled to the movable rail 80 of the third vertical rod 523 and the fourth vertical rod 524. The two ends of the first supporting rod 511 are respectively connected to the top ends of the first vertical rod 521 and the third vertical rod 523, and the two ends of the second supporting rod 512 are respectively connected to the top ends of the second vertical rod 522 and the fourth vertical rod 524.

As shown in FIG. 2 , a preferred embodiment, the lifting drive unit 60 is a reciprocating screw drive mechanism, which includes: a motor 61, a lead screw 62 (preferably a ball screw), a nut support 63 and a screw support seat 64, wherein the nut support 63 is fixed to the movable frame 50. In a preferred embodiment, the movable frame 50 is provided with a support rod 53, and the support rod 53 is arranged inside The front side of the box 20, the nut support 63 is fixedly arranged on the support rod 53, the screw support seat 64 is fixed to the inner side wall of the front side of the outer shell 10, and the motor 61 is arranged inside the outer shell 10 and close to its bottom. One end of the motor 61 is connected to the lead screw 62 to drive the lead screw 62 to rotate; the lead screw 62 passes through the nut support 63, and the other end of the lead screw 62 is rotatably connected to the screw support seat 64. Among them, the motor 61 is electrically connected to the control circuit 36, and the control circuit 36 controls the operation of the motor 61, thereby driving the lead screw 62 to drive the movable frame 50 to rise to the second position, or drive the movable frame 50 to descend to the first position.

The preferred embodiment structure is shown in the figure of the present invention, wherein the lifting drive unit 60 is a reciprocating screw drive mechanism. However, anyone skilled in the art of the present invention can simply replace the above-mentioned reciprocating screw drive mechanism with other equivalent mechanisms after understanding the technical features and functions of the present invention. For example, the above-mentioned reciprocating screw drive mechanism can be replaced with any one of a reciprocating hydraulic drive system, a reciprocating hydraulic drive system, a reciprocating chain drive system and a reciprocating steel cable drive system. However, these simple replacements should still fall within the technical scope of the present invention.

Please refer to FIG. 8 , which shows another preferred embodiment of the present invention, wherein the inner box 20 of the freezer is equipped with a plurality of automatic lifting devices, each of which is equipped with a storage rack 40, and each of which is equipped with a corresponding lifting control interface 35; for a larger freezer, the storage space of the inner box 20 can be reasonably allocated according to needs, and the user can also operate any of the automatic lifting devices at will, and conveniently take the food or items placed on the bottom layer of the storage rack 40.

Although the present invention has been disclosed through the above-mentioned embodiments, it is not intended to limit the present invention. Anyone familiar with similar techniques can make some changes and modifications within the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be subject to the definition of the claims attached to this specification.

10: Shell

11: Open mouth

20: Inner box

40: Storage rack

41:Hanging ears

42: Shelf

50: Movable rack

51: Loading rod

511: First load bearing rod

512: Second bearing rod

521: First stand

522: Second stand

523: Third pole

524: Fourth Stand

53: Support rod

60: Lifting drive unit

61: Electric motor

62: Lead screw

63: Nut support

64: Screw support seat

70: Fixed rail

701: First fixed rail

702: Second fixed rail

703: Third fixed rail

704: Fourth fixed rail

80:Activity track

Claims (9)

A freezer structure, the freezer structure includes: an outer shell, an inner box, a refrigeration system and an electrical control system; the inner box is arranged inside the outer shell, there is a gap between the inner side wall of the outer shell and the outer side wall of the inner box, the outer shell has an opening connected to the inside of the inner box, the opening is equipped with a cabinet door, the electrical control system has a control circuit, the control circuit is electrically connected to the refrigeration system, and is used to control the operation of the refrigeration system; its characteristics are: it also includes an automatic lifting device, the structure of the automatic lifting device includes: A storage rack that can be freely placed into the inner box from top to bottom and taken out from the inner box from bottom to top. Two opposite sides of the top of the storage rack are respectively provided with a hanging ear; A movable rack is arranged on the outer side of the inner box and in the gap between the inner side wall of the outer shell and the outer side wall of the inner box. The movable rack is equipped with a bearing rod, which is placed on the top of the inner box. The hanging ears of the storage rack can be hung on the bearing rod. The movable rack can drive the storage rack to move vertically to a first position at the lowest and a second position at the highest. When the movable rack rises to the second position, the storage rack is lifted up and leaves the inner box. When the movable rack descends to the first position, the storage rack is placed in the inner box; and A lifting drive unit is disposed inside the outer shell. The lifting drive unit is electrically connected to the control circuit of the electrical control system. The lifting drive unit is connected to the movable frame. The control circuit is electrically connected to a lifting control interface. The control circuit controls the lifting drive unit to drive the movable frame to rise to the second position and to drive the movable frame to descend to the first position according to the user's operation on the lifting control interface. The structure of the freezer as described in claim 1, wherein there is a distance between the storage rack and the inner wall of the inner box. The structure of the freezer as described in claim 1, wherein the supporting rod has two parts, namely a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are placed on top of the inner box, the first supporting rod and the second supporting rod are respectively close to the two sides of the inner box, and after the storage rack is placed in the inner box, the storage rack can be hung on the first supporting rod and the second supporting rod respectively by the hanging ears. The structure of the freezer as described in claim 1 further includes: a fixed rail, which is a linear rail, fixedly arranged on the inner wall of the outer shell, and extending in the vertical direction; a movable rail arranged on the movable frame, which can be coupled with the fixed rail, and the movable frame can be moved in the vertical direction to the first position and the second position by the guidance of the movable rail and the fixed rail. The structure of the freezer as described in claim 4, wherein the movable frame includes: a plurality of vertical rods, the vertical rods are respectively arranged on the outer side of the inner box, the positions of the vertical rods respectively correspond to the positions of one of the fixed guide rails, and each of the vertical rods is equipped with one of the movable guide rails. The structure of the freezer as described in claim 4, wherein the movable frame includes: a first upright pole, a second upright pole, a third upright pole and a fourth upright pole, and the first upright pole, the second upright pole, the third upright pole and the fourth upright pole are respectively equipped with a movable rail; the fixed rail includes a first fixed rail, a second fixed rail, a third fixed rail and a fourth fixed rail. The first vertical rod and the second vertical rod are located on the front side of the inner box, and the third vertical rod and the fourth vertical rod are located on the back side of the inner box; the first fixed rail and the second fixed rail are fixedly configured on the inner side wall of the front side of the outer shell, and the first fixed rail and the second fixed rail are respectively coupled to the movable rail of the first vertical rod and the second vertical rod, and the movable rail of the first vertical rod and the second vertical rod are respectively coupled to the movable rail of the first vertical rod and the second vertical rod. The inner side wall of the back side is fixedly provided with the third fixed rail and the fourth fixed rail, and the third fixed rail and the fourth fixed rail are respectively coupled to the movable rail of the third vertical pole and the fourth vertical pole; the bearing rod has two parts, namely a first bearing rod and a second bearing rod, and the two ends of the first bearing rod are respectively connected to the top ends of the first vertical pole and the third vertical pole, The two ends of the second supporting rod are respectively connected to the top ends of the second vertical rod and the fourth vertical rod. The first supporting rod and the second supporting rod are placed on the top of the inner box. The first supporting rod and the second supporting rod are respectively close to the two sides of the inner box. After the storage rack is placed in the inner box, the storage rack can be hung on the first supporting rod and the second supporting rod respectively through the hanging ears. The structure of the freezer as described in claim 1, wherein the lifting drive unit is a reciprocating screw drive mechanism, which includes: an electric motor, a lead screw, a nut support and a screw support seat, wherein the nut support is fixed to the movable frame, the screw support seat is fixed to the inner side wall of the front side of the outer shell, the electric motor is arranged inside the outer shell and close to its bottom, and the electric motor The motor is connected to one end of the lead screw for driving the lead screw to rotate; the lead screw passes through the nut support, and the other end of the lead screw is rotatably connected to the screw support seat. The motor is electrically connected to the control circuit, and the control circuit controls the operation of the motor, thereby driving the lead screw to drive the movable frame to rise to the second position, or drive the movable frame to descend to the first position. The structure of the freezer as described in claim 1, wherein the lifting drive unit is any one of: a reciprocating hydraulic drive system, a reciprocating hydraulic drive system, a reciprocating chain drive system and a reciprocating steel cable drive system. The structure of the freezer as described in claim 1, wherein the outer shell is equipped with a position detector, the control circuit is electrically connected to the position detector, and the control circuit detects whether the cabinet door is opened to the preset correct position through the position detector. When the cabinet door is opened to the correct position, the position detector is triggered, and the control circuit controls the operation of the lifting drive unit.

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