Structure of cabinet freezer
By introducing an automatic lifting device into the freezer, the problem of difficulty in accessing food at the bottom of the horizontal freezer is solved, enabling convenient access and categorized storage of items and reducing food waste.
Patent Information
- Application Number
- CN202520002384.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-02
AI Technical Summary
In the use of existing horizontal freezers, it is difficult to access food or items at the bottom, especially when there are many items stacked, which can easily lead to food spoilage and waste.
Design a freezer equipped with an automatic lifting device. The storage rack is moved vertically by a lifting drive unit and a movable frame, so as to realize the automatic lifting of the storage rack and facilitate the access of food or items at the bottom.
This allows for easy access to food or items at the bottom of the freezer, improving usability and reducing food waste.
Smart Images
Figure CN223954475U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the structure of a refrigerator, in particular, the structure of a freezer. BACKGROUND
[0002] The existing freezers can be divided into two categories, namely, a horizontal type freezer and a vertical type freezer. The vertical type freezer is similar to the general household refrigerator, the body is relatively narrow and the floor area is relatively small, the food or the articles are placed in layers by using shelves or drawers, the advantage is that the food or the articles are placed in layers and are convenient to take, and most of them have the function of eliminating frost, but the price is slightly higher than that of the horizontal type freezer.
[0003] Compared with the vertical type freezer, the horizontal type freezer has the advantages of high cost performance (CP value) of price and capacity, but the horizontal type freezer is deeper and has a larger cold layer space, which makes it difficult to take the food or the articles stacked in layers, especially the food or the articles placed in the bottom layer of the freezer, especially when the food or the articles are stacked in a large number, it is difficult to find the food or the articles, so the food is often stored for too long and exceeds the shelf life, causing waste. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the present application is to provide a freezer which is convenient to take and convenient to classify and store food or articles.
[0005] To solve the above technical problems, a preferred embodiment of the structure of the freezer of the present application comprises: an outer shell, an inner box, a refrigeration system and an electrical control system; the inner box is arranged in the interior of 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 which is in communication with the interior of the inner box, the opening is provided with a cabinet door, the electrical control system has a control circuit, the control circuit is electrically connected with the refrigeration system for controlling the operation of the refrigeration system; characterized in that: further comprising an automatic lifting device, the structure of the automatic lifting device comprises:
[0006] A storage rack can be freely placed in the inner box from top to bottom and taken out from bottom to top, the top end of the storage rack is provided with a hanging ear on each of the opposite sides;
[0007] The activity frame is arranged outside the inner box and between the inner wall of the shell and the outer wall of the inner box. The activity frame is provided with a bearing rod which is arranged above the inner box. The hanging ears of the storage rack can be hung on the bearing rod. The activity frame can drive the storage rack to move vertically to a first position which is the lowest position and a second position which is the highest position. When the activity frame rises to the second position, the storage rack is lifted upward to be separated from the inner box. When the activity frame falls to the first position, the storage rack is put into the inner box.
[0008] A lifting driving unit is arranged inside the shell. The lifting driving unit is electrically connected with the control circuit of the electrical control system. The lifting driving unit is connected with the activity frame. The control circuit is electrically connected with a lifting control interface. According to the operation of the lifting control interface by the user, the control circuit controls the lifting driving unit to drive the activity frame to rise to the second position and to fall to the first position.
[0009] As a preferred embodiment of the present application, there is a space between the storage rack and the inner wall of the inner box.
[0010] As a preferred embodiment of the present application, the bearing rod has two first bearing rods and second bearing rods. The first bearing rod and the second bearing rod are arranged above 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 put into the inner box, the storage rack can be hung on the first bearing rod and the second bearing rod through the hanging ears.
[0011] As a preferred embodiment of the present application, the fixed guide rail is a straight guide rail which is fixedly arranged on the inner wall of the shell and extends along the vertical direction. The movable guide rail is arranged on the activity frame. The movable guide rail can be coupled with the fixed guide rail. The activity frame can be guided by the fixed guide rail and the movable guide rail to move vertically to the first position and the second position.
[0012] As a preferred embodiment of the present application, the activity frame includes a plurality of vertical rods which are arranged outside the inner box. The positions of the vertical rods correspond to the positions of the fixed guide rail. Each vertical rod is provided with a movable guide rail.
[0013] As a preferred embodiment of the present application, the movable frame comprises a first vertical rod, a second vertical rod, a third vertical rod and a fourth vertical rod, each of which is provided with a movable guide rail; the fixed guide rails comprise a first fixed guide rail, a second fixed guide rail, a third fixed guide rail and a fourth fixed guide rail; the first vertical rod and the second vertical rod are located at the front side of the inner box, and the third vertical rod and the fourth vertical rod are located at the back side of the inner box; the first fixed guide rail and the second fixed guide rail are fixedly arranged on the inner side wall of the front side of the outer shell and are coupled to the movable guide rails of the first vertical rod and the second vertical rod respectively; the third fixed guide rail and the fourth fixed guide rail are fixedly arranged on the inner side wall of the back side of the outer shell and are coupled to the movable guide rails of the third vertical rod and the fourth vertical rod respectively.
[0014] The carrying rods comprise a first carrying rod and a second carrying rod, the two ends of the first carrying rod are connected to the top ends of the first vertical rod and the third vertical rod respectively, the two ends of the second carrying rod are connected to the top ends of the second vertical rod and the fourth vertical rod respectively, the first carrying rod and the second carrying rod are arranged above the inner box, and the first carrying rod and the second carrying rod are close to the two sides of the inner box respectively; after the storage rack is placed into the inner box, the storage rack can be hung on the first carrying rod and the second carrying rod through the hanging ears.
[0015] As a preferred embodiment of the present application, the lifting driving unit is a reciprocating screw driving mechanism, which comprises a motor, a lead screw, a nut support and a screw support, wherein the nut support is fixed to the movable frame, the screw support is fixed to the inner side wall of the front side of the outer shell, the motor is arranged in the inner box and close to the bottom of the inner box, 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, the other end of the lead screw is rotatably connected to the screw support, the motor is electrically connected to the control circuit, the operation of the motor is controlled by the control circuit, and then the lead screw drives the movable frame to rise to the second position or drives the movable frame to descend to the first position.
[0016] As a preferred embodiment of the present application, the lifting driving unit is any one of a reciprocating hydraulic driving system, a reciprocating chain driving system and a reciprocating steel cable driving system.
[0017] As a preferred embodiment of the present application, the outer shell is provided with a position detector, the control circuit is electrically connected to the position detector, the control circuit detects whether the cabinet door is opened to the correct position through the position detector, the position detector is triggered only when the cabinet door is opened to the correct position, and the control circuit controls the operation of the lifting driving unit only when the cabinet door is opened to the correct position.
[0018] The advantages and effects of the present application are that the freezing cabinet is provided with an automatic lifting device, a user can operate a lifting control interface to control the action of a lifting driving device, and the lifting driving device drives the movable frame and the storage frame to move upward or downward in the freezing cabinet; when the storage frame moves upward, the food or articles stored in the storage frame can be lifted upward and away from the inner box, so that the user can conveniently take the food or articles placed on the bottom layer of the storage frame; conversely, when the storage frame moves downward, the storage frame and the food or articles stored therein can be placed in the inner box.
[0019] On the other hand, the present application is provided with a position detector, if the cabinet door of the freezing cabinet is not opened to the correct position, even if the user operates the lifting control interface, the control circuit will not control the lifting driving unit to operate, thereby providing a reliable and safe machine to avoid failure or damage.
[0020] The details of other effects and embodiments of the present application are described below in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0022] Figure 1 is a schematic diagram of the structure of a preferred embodiment of the structure of the freezing cabinet of the present application;
[0023] Figure 2 is a partial structure exploded view of the embodiment of Figure 1 ;
[0024] Figure 3 is a cross-sectional structure schematic diagram of the embodiment of Figure 1 ;
[0025] Figures 4 to 6 is a continuous action schematic diagram of the structure of the freezing cabinet of the present application;
[0026] Figure 7 is a function block diagram of the electrical control system of the structure of the freezing cabinet of the present application;
[0027] Figure 8 is a schematic diagram of the structure of another preferred embodiment of the structure of the freezing cabinet of the present application.
[0028] SYMBOL DESCRIPTION
[0029] 10: shell 11: opening
[0030] 12: cabinet door 13: hinge
[0031] 14: position detector 20: inner box
[0032] 30: compressor 31: temperature detector
[0033] 32: control panel 33: temperature control interface
[0034] 34: display 35: lifting control interface
[0035] 36: control circuit 40: storage rack
[0036] 41: hanging ear 42: layer board
[0037] 50: movable frame 51: bearing rod
[0038] 511: first bearing rod 512: second bearing rod
[0039] 521: first vertical rod 522: second vertical rod
[0040] 523: third vertical rod 524: fourth vertical rod
[0041] 53: support rod 60: lifting driving unit
[0042] 61: motor 62: lead screw
[0043] 63: nut holder 64: screw support
[0044] 70: fixed guide rail 701: first fixed guide rail
[0045] 702: second fixed guide rail 703: third fixed guide rail
[0046] 704: fourth fixed guide rail 80: movable guide rail DETAILED DESCRIPTION
[0047] In the embodiments disclosed in the present patent specification and drawings, the directions mentioned (such as up, down, left, right, front and back) are based on the content shown in the drawings for explaining the relative relationship (such as the positional relationship, the coupling relationship and the action relationship) between the components or structures in the embodiments. In principle, the directions mentioned in the present patent specification will be appropriate when the components or structures mentioned in the present patent specification and the positions shown in the drawings are consistent. If the positions of the components or structures mentioned in the present patent specification are changed, the directions mentioned should also be changed accordingly. The relative positional relationship of some structures or components in the embodiments shown in the drawings of the present patent specification may not be easily distinguished due to the overlapping of the view angles in the drawings, and some structures are omitted in the drawings, which is not an error in the drawing composition. The components and the relative positions and relationships thereof should be understood by referring to the content of all the drawings.
[0048] First, please refer to Figure 1 , Figure 2 and Figure 3 , which are the structural schematic diagram, the partial structural exploded view and the sectional structural schematic diagram of a preferred embodiment of the structure of the freezer of the present patent application. The preferred embodiment of the structure of the freezer of the present patent application comprises a shell 10, an inner box 20, an automatic lifting device (see Figure 2 ), a refrigeration system and an electrical control system.
[0049] The shell 10 is usually made of metal, the inner box 20 is arranged inside the shell 10, and there is a gap between the inner side wall of the shell 10 and the outer side wall of the inner box. A heat insulation material (not shown in the drawings) is usually filled between the inner side wall of the shell 10 and the outer side wall of the inner box 20. The inner box 20 is generally made of ABS or HIPS plate material by vacuum forming, and the heat insulation material widely used is polyurethane foam material. The inner box 20 is basically an open-top box structure, which has an upright side wall and a bottom plate. The inner box 20 is hollow inside as a storage space for food or articles. The shell 10 has an opening 11 facing upward and communicating with the inside of the inner box 20. A cabinet door 12 for closing the opening is arranged at the opening 11 of the shell 10. One embodiment of the cabinet door 12 is a design of being upwardly hinged (see Figure 1 ). One side edge of the cabinet door 12 is connected to the back side of the shell 10 by a hinge 13. The cabinet door 12 can be opened upward to expose the inner box 20.
[0050] The refrigeration system comprises a compressor 30, a condenser, a capillary tube and an evaporator (not shown in the figure as it is a prior art), and generally uses a refrigerant as the refrigerant. The compressor drives the refrigerant to circulate between the condenser and the evaporator, so that the refrigerant generates heat absorption in the evaporator and then generates heat release in the condenser. The heat absorption of the evaporator generates a low-temperature environment in the inner box, thereby forming a low-temperature storage space in the inner box 20 for storing food or articles that need to be stored at low temperature.
[0051] Referring to Figure 7 , the electrical control system comprises a temperature detector 31, a control panel 32 (generally provided with a power switch, 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 operation information of the freezer, a lifting control interface 35 (such as a button), and a control circuit 36 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, the temperature control interface 33, the display 34 and the lifting control interface 35 are all arranged on the outside of the shell 10, so as to be operated by the user and read the operation information and the temperature of the freezer.
[0052] Referring to Figure 2 , the preferred embodiment of the automatic lifting device comprises a storage rack 40, a movable rack 50, and a lifting drive unit 60.
[0053] The opposite sides of the top end of the storage rack 40 are respectively provided with hanging ears 41. 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 of the inner box 20 from bottom to top. In a preferred embodiment, there is a space between the storage rack 40 and the inner side wall of the inner box 20, which can prevent the storage rack 40 from being frozen in the inner box 20.
[0054] A preferred embodiment of the storage rack 40 comprises a plurality of shelves 42 located at different heights, each shelf 42 is used to carry food or articles, and the storage rack 40 is a multi-layer storage rack, Figure 2 A three-layer storage rack is shown, and other embodiments can also be a single-layer storage rack 40. Preferably, the shelf 42 is of a drawer type structure, so that the shelf 42 can be freely taken out and put into the storage rack 40, which is convenient for the user to freely adjust and utilize the storage space of the storage rack 40.
[0055] The movable shelf 50 is disposed in the gap between the inner side wall of the outer shell 10 and the outer side wall of the inner box 20, and is provided with a supporting rod 51 for supporting the storage shelf 40. The supporting rod 51 is disposed above the inner box 20, and the hanging ear 41 of the storage shelf 40 can be hung on the supporting rod 51. The movable shelf 50 is used to drive the storage shelf 40 to move vertically to a first position (see Figure 4 ) at the lowest and a second position (see Figure 6 ) at the highest. When the movable shelf 50 rises to the second position, the storage shelf 40 is lifted upward to be away from the inner box 20. When the movable shelf 50 falls to the first position, the storage shelf 40 is put into the inner box 20. It should be noted that the preferred embodiment of the movable shelf 50 is located at the periphery of the heat insulation material or avoids the heat insulation material, and the movable shelf 50 can move freely upward or downward outside the inner box 20.
[0056] The lifting driving unit 60 is disposed in the inner part of the outer shell 10, and is electrically connected to the control circuit 36 of the electrical control system. The lifting driving unit 60 is connected to the movable shelf 50. The control circuit 36 is electrically connected to the lifting control interface 35. According to the operation of the lifting control interface 35 by the user, the control circuit 36 controls the lifting driving unit 60 to drive the movable shelf 50 to rise to the second position and to fall to the first position.
[0057] In a preferred embodiment, the automatic lifting device further comprises a fixed guide rail 70 and a movable guide rail 80. As shown in Figure 2 and Figure 3 , the fixed guide rail 70 is a linear guide rail, and is fixedly disposed on the inner side wall of the outer shell 10 and extends along the vertical direction. The movable guide rail 80 is disposed on the movable shelf 50, and can be coupled with the fixed guide rail 70. The movable shelf 50 can be guided by the fixed guide rail 70 and the movable guide rail 80 to move vertically to the first position at the lowest and the second position at the highest.
[0058] A preferred embodiment of the supporting rod 51 of the movable shelf 50 comprises a first supporting rod 511 and a second supporting rod 512, which are disposed above the inner box 20 (see Figure 1), the first bearing rod 511 and the second bearing rod 512 are respectively close to two sides of the inner box 20, after the storage shelf 40 is placed in the storage space of the inner box 20, the storage shelf 40 can be hung on the first bearing rod 511 and the second bearing rod 512 respectively through the hanging ears 41; when the movable shelf 50 is raised to the second position, the storage shelf 40 can be lifted upward together, so that the storage shelf 40 and the food or articles stored therein are lifted upward together and leave the inner box 20, and the user can conveniently take the food or articles placed on the bottom layer of the storage shelf 40; on the contrary, when the movable shelf 50 is lowered to the first position, the storage shelf 40 and the food or articles stored therein can be placed in the inner box 40 together; the user can also control the lifting and lowering of the movable shelf 50 and the storage shelf 40 by operating the lifting control interface 35, and stop at the required height (see Figures 4 to 6 )。
[0059] A preferred embodiment of the present application is that a position detector 14 is arranged on the shell 10, the position detector 40 can use, for example, limit switches; a preferred embodiment is that the position detector 14 is arranged on the hinge 13 of the cabinet door 12 (see Figure 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 the default correct position through the position detector 14, the so-called correct position refers to the position of the cabinet door 12 opened, which does not hinder the normal lifting of the movable shelf 50 and the storage shelf 40 to the second position (such as the vertical position shown in Figures 4 to 6 ), in other words, when the cabinet door 12 is opened to the correct position, the position detector 14 is triggered, and the control circuit 36 controls the operation of the lifting driving unit 60; 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 operation of the lifting driving unit 60, thereby providing a reliable and safe machine to avoid failure or damage.
[0060] In other embodiments, the cabinet door 12 is designed as a sliding door, generally, a track is arranged on the edge of the opening 11 of the shell 10, and the cabinet door 12 is arranged in the track in a slidable manner, similarly, for the cabinet door 12 designed as a sliding door, the position detector 14 can be arranged on the edge of the opening 11 of the shell 10 to detect the position of the cabinet door 12.
[0061] A preferred embodiment of the movable shelf 50 comprises: a plurality of vertical rods are arranged on the outer side of the inner box 20, the plurality of vertical rods are arranged at positions corresponding to a fixed guide rail 70, and each vertical rod is provided with an active guide rail 80; as Figure 2In the preferred embodiment shown, the plurality of vertical rods includes a first vertical rod 521, a second vertical rod 522, a third vertical rod 523, and a fourth vertical rod 524, each of which is provided with a movable guide rail 80. The first vertical rod 521 and the second vertical rod 522 are located on the front side of the inner box 20, and 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 guide rail 701 and the second fixed guide rail 702 are fixedly arranged on the inner side wall of the front side of the outer shell 10 and are coupled to the movable guide rails 80 of the first vertical rod 521 and the second vertical rod 522, respectively. The third fixed guide rail 703 and the fourth fixed guide rail 704 are fixedly arranged on the inner side wall of the back side of the outer shell 10 and are coupled to the movable guide rails 80 of the third vertical rod 523 and the fourth vertical rod 524, respectively. The two ends of the first bearing rod 511 are connected to the top ends of the first vertical rod 521 and the third vertical rod 523, respectively, and the two ends of the second bearing rod 512 are connected to the top ends of the second vertical rod 522 and the fourth vertical rod 524, respectively.
[0062] As Figure 2 In the preferred embodiment shown, the lifting driving unit 60 is a reciprocating screw driving mechanism, which includes an electric motor 61, a lead screw 62 (preferably a ball screw), a nut support 63, and a screw support 64. In a preferred embodiment, the movable frame 50 is provided with a support rod 53 arranged on the front side of the inner box 20, and the nut support 63 is fixedly arranged on the support rod 53. The screw support 64 is fixedly arranged on the inner side wall of the front side of the outer shell 10. The electric motor 61 is arranged inside the outer box 10 and near the bottom thereof. The electric motor 61 is connected to one end of the lead screw 62 for driving 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 64. The electric motor 61 is electrically connected to the control circuit 36, and the operation of the electric motor 61 is controlled by the control circuit 36, thereby driving the lead screw 62 to drive the movable frame 50 to rise to the second position or to drive the movable frame 50 to descend to the first position.
[0063] In the preferred embodiment shown in the drawings, although the lifting driving unit 60 is a reciprocating screw driving mechanism, any person skilled in the art, after understanding the technical features and effects of the present application, can simply replace the above-mentioned reciprocating screw driving mechanism with other equivalent mechanisms, such as any one of a reciprocating hydraulic driving system, a reciprocating chain driving system, and a reciprocating cable driving system. However, these simple replacements still belong to the technical scope of the present application.
[0064] Please refer toFigure 8 , the inner box 20 of the freezer is configured with multiple automatic lifting devices, each of which is configured with a storage rack 40, and each of which is respectively configured with a corresponding lifting control interface 35; for a larger size freezer, the storage space of the inner box 20 can be reasonably allocated as needed, and the user can arbitrarily operate any one of the automatic lifting devices and conveniently take the food or articles placed on the bottom layer of the storage rack 40.
[0065] The above-mentioned embodiments and / or implementations are only used to illustrate the preferred embodiments and / or implementations of the present application, and do not limit the embodiments of the present application in any form. Any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, but should be considered as the same technology or embodiment as the present application.
Claims
1. A construction of a freezer cabinet, characterized in that, The structure of the freezer comprises a shell, an inner box, a refrigeration system and an electrical control system; the inner box is arranged inside the shell, and there is a gap between the inner side wall of the shell and the outer side wall of the inner box; the shell has an opening which is in communication with the inside of the inner box, and the opening is provided with a cabinet door; the electrical control system has a control circuit which is electrically connected with the refrigeration system for controlling the operation of the refrigeration system; characterized in that: further comprising an automatic lifting device, the structure of the automatic lifting device comprises: a storage rack which can be freely put into and taken out of the inner box from top to bottom and from bottom to top; opposite sides of the top end of the storage rack are respectively provided with a hanging ear; a movable frame which is arranged outside the inner box and between the gap between the inner side wall of the shell and the outer side wall of the inner box; the movable frame is provided with a bearing rod which is arranged above the inner box, and the hanging ear of the storage rack can be hung on the bearing rod; the movable frame can drive the storage rack to move vertically to a first position which is the lowest position and a second position which is the highest position; when the movable frame rises to the second position, the storage rack is lifted upward to be away from the inner box; when the movable frame falls to the first position, the storage rack is put into the inner box; and a lifting driving unit which is arranged inside the shell and is electrically connected with the control circuit of the electrical control system; the lifting driving unit is connected with the movable frame; the control circuit is electrically connected with a lifting control interface; and the control circuit controls the lifting driving unit to drive the movable frame to rise to the second position and to fall to the first position according to the operation of the lifting control interface by the user.
2. The construction of a freezer cabinet according to claim 1, characterized in that There is a gap between the storage rack and the inner side wall of the inner box.
3. The construction of a freezer cabinet according to claim 1, characterized in that The bearing rod has two first and second bearing rods which are arranged above the inner box and are respectively close to the two sides of the inner box; after the storage rack is put into the inner box, the storage rack can be hung on the first and second bearing rods through the hanging ear.
4. The construction of a freezer cabinet according to claim 1, characterized in that Further comprising: a fixed guide rail which is a straight guide rail and is fixedly arranged on the inner side wall of the shell and extends along the vertical direction; and a movable guide rail which is arranged on the movable frame and can be coupled with the fixed guide rail; the movable frame can be guided by the fixed guide rail and the movable guide rail to move vertically to the first position and the second position.
5. The construction of a freezer cabinet according to claim 4, characterized in that The movable frame comprises a plurality of vertical rods which are arranged outside the inner box and correspond to the positions of the fixed guide rails; each vertical rod is provided with a movable guide rail.
6. The construction of a freezer cabinet according to claim 4, characterized in that The activity frame comprises a first vertical pole, a second vertical pole, a third vertical pole and a fourth vertical pole, each of which is provided with an activity guide rail; the fixed guide rail comprises a first fixed guide rail, a second fixed guide rail, a third fixed guide rail and a fourth fixed guide rail; the first vertical pole and the second vertical pole are located at the front side of the inner box, and the third vertical pole and the fourth vertical pole are located at the back side of the inner box; the first fixed guide rail and the second fixed guide rail are fixedly arranged on the inner side wall of the front side of the outer shell, and are respectively coupled to the activity guide rails of the first vertical pole and the second vertical pole; the third fixed guide rail and the fourth fixed guide rail are fixedly arranged on the inner side wall of the back side of the outer shell, and are respectively coupled to the activity guide rails of the third vertical pole and the fourth vertical pole; The bearing rod has two first bearing rods and second bearing rods, 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 bearing rod are respectively connected to the top ends of the second vertical pole and the fourth vertical pole, the first bearing rod and the second bearing rod are arranged above the inner box, and the first bearing rod and the second bearing 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 bearing rod and the second bearing rod through the hanging ears.
7. The construction of a freezer cabinet according to claim 1, characterized in that The lifting driving unit is a reciprocating screw driving mechanism, which comprises an electric motor, a lead screw, a nut support and a screw support seat, wherein the nut support is fixed to the activity 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 box and close to the bottom thereof, and one end of the electric motor is connected to 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 electric motor is electrically connected to the control circuit, the operation of the electric motor is controlled by the control circuit, and then the lead screw drives the activity frame to rise to the second position or drives the activity frame to descend to the first position.
8. The construction of a freezer cabinet according to claim 1, characterized in that The lifting driving unit is any one of a reciprocating hydraulic driving system, a reciprocating chain driving system and a reciprocating steel cable driving system.
9. The construction of a freezer cabinet according to claim 1, characterized in that The outer shell is provided with a position detector, the control circuit is electrically connected to the position detector, the control circuit detects whether the cabinet door is opened to the correct position through the position detector, the position detector is triggered only when the cabinet door is opened to the correct position, and the control circuit controls the operation of the lifting driving unit only when the cabinet door is opened to the correct position.