Variable car expansion refrigerator

Abstract

The present invention relates to the technical field of refrigerators, and discloses a variable vehicle-mounted expandable refrigerator, comprising a first box body, wherein a semi-automatic door opening assembly is arranged inside the first box body for facilitating front-row passengers and rear-row passengers to open the first box body, the semi-automatic door opening assembly comprises a first box door and a second box door for blocking the top of the first box body, a convex piece is fixedly connected to the top of the first box door for facilitating rear-row passengers to open the first box body, and an L-shaped sliding groove for limiting the first box door and the second box door is symmetrically arranged on the inner wall of the first box body. The present invention improves the inconvenience caused by the vehicle-mounted refrigerator door opening method in the prior art to the convenience of passengers through the clamping mechanism of a pressing block and a clamping block. The front-row passenger can press the pressing block and drive the clamping block and the sliding block to move, thereby pulling the first box door and the second box door to move, thereby achieving the purpose of opening, and at the same time, the rear-row passenger can pull or push through the convex piece on the surface of the first box door.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerators, and in particular to a variable vehicle-mounted expandable refrigerator. Background Art

[0002] A car refrigerator is a refrigeration device designed specifically for vehicles. It can be carried and used in vehicles such as cars, providing refrigeration and freezing functions.

[0003] However, there are still some problems with existing car refrigerators: First, car refrigerators are usually designed to be located between the driver and the co-driver to maximize the use of the space in the car, but the way the door is opened has different degrees of impact on the convenience of passengers.

[0004] First, the refrigerator door that opens toward the rear passengers is not convenient enough for the front passengers. Although this design takes the needs of the rear passengers into consideration, the front passengers must frequently turn around or sideways when they need to take or put items, which increases the complexity and inconvenience of the operation. Especially during driving, the front passengers need to focus on the driving or co-pilot tasks. Frequent turning operations not only distract attention, but also may cause safety hazards.

[0005] Secondly, the design of a refrigerator with the door opening towards the front passenger is also inconvenient for the front passenger. Since the car refrigerator is generally placed behind the driver and co-pilot, the front passenger must reach back when he needs to take or put items, which increases the complexity and inconvenience of operation. Especially when the front passenger needs to take or put items frequently, this design will cause the front passenger's posture to be unnatural, increasing fatigue and discomfort.

[0006] Finally, although the double-door design takes into account the needs of front and rear passengers to a certain extent, its operation is also inconvenient. The double-door design requires the front passenger to twist his body when taking and putting items, which increases the complexity and inconvenience of operation. Especially when the front passenger needs to take and put items frequently, this design will cause the front passenger to have an unnatural posture. In addition, the double-door design will also reduce the space utilization inside the car refrigerator.

[0007] Secondly, the volume of the car refrigerator is fixed after leaving the factory, so when storing larger items, it is often found that there is not enough space, which limits the practicality and convenience of the refrigerator. The prior art proposes to design the refrigerator door to be replaceable to achieve capacity expansion.

[0008] But first of all, the design of replaceable refrigerator doors requires another refrigerator door to be prepared in the car, which increases the complexity and tediousness of use. The owner needs to carry an extra refrigerator door in the car, which not only increases the burden inside the vehicle, but may also lead to further limitation of the space inside the vehicle. Secondly, although this design of vertically increasing the volume solves the problem of insufficient space to a certain extent, the vertical increase in volume means that the height inside the refrigerator increases, which will cause the items inside the refrigerator to be unstable. Especially during the driving process of the vehicle, the items inside the refrigerator will slide or fall over due to bumps, increasing the difficulty and inconvenience of taking and putting items.

[0009] Finally, since the refrigerator door needs to be constantly disassembled, this can easily lead to unstable installation of the refrigerator door, increasing the risk of damage to the refrigerator door. Especially during vehicle driving, the unstable installed refrigerator door will vibrate frequently, which may cause the refrigerator door to loosen or be damaged, affecting the normal use of the refrigerator. In order to solve this problem, the owner may need to frequently check and maintain the refrigerator door, increasing the cost and inconvenience of maintenance.

[0010] To this end, the present invention proposes a variable vehicle-mounted expandable refrigerator. Summary of the invention

[0011] The object of the present invention is to provide a variable vehicle-mounted expandable refrigerator to solve the problems raised in the above background technology.

[0012] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a variable vehicle-mounted expandable refrigerator, comprising a first box body, the interior of the first box body is provided with a semi-automatic door opening assembly for facilitating front passengers and rear passengers to open the first box body, the semi-automatic door opening assembly comprises a first box door and a second box door for blocking the top of the first box body, the top of the first box door is fixedly connected with a protrusion for facilitating rear passengers to open the first box body, and the inner wall of the first box body is symmetrically provided with L-shaped slide grooves for limiting the first box door and the second box door.

[0013] Preferably, the semi-automatic door opening assembly also includes a rotating shaft, which is rotatably connected to the side of the first door and the second door that is close to each other, and the bottom of the second door on a side away from the first door is rotatably connected to a pulling block, and the bottom of the pulling block is rotatably connected to a sliding block, the interior of the sliding block is fixedly connected to a disengagement spring, and the end of the disengagement spring away from the interior of the sliding block is fixedly connected to a clamping block.

[0014] Preferably, a reset spring is fixedly connected between the bottom of the sliding block and the bottom of the inner cavity of the first box body, the outer wall of the first box body is fixedly connected to an external shell, the sliding block is slidably connected to the inner surface of the external shell, the top of the inner cavity of the external shell is fixedly connected to a tension spring, the bottom of the tension spring is fixedly connected to a pressing block, and the bottom of the inner cavity of the external shell is fixedly connected to a release block.

[0015] Preferably, an adaption groove is provided at the bottom of the pressing block, and a round protrusion is symmetrically fixedly connected to the inner surface of the external shell. A snap-in hole is provided through the middle of the pressing block. As the pressing block is continuously pressed, the snap-in hole on the surface of the pressing block will snap into the round protrusion. The side of the external shell away from the first box body is linearly equidistant and symmetrically installed with bristles. The ends of both sides of the first and second box doors away from each other are fixedly connected with limit rods, and the limit rods are slidably connected to the inside of the L-shaped slide groove, and the bending part of the L-shaped slide groove is rounded.

[0016] Preferably, a bottom side slide is fixedly connected to the bottom of the first box, an end of the bottom side slide away from the first box is fixedly connected to a cup holder, and an upper surface of the bottom side slide is slidably connected to the second box.

[0017] Preferably, a lateral expansion component for expanding the capacity of the first box body is provided at the bottom of the first box body, and the lateral expansion component includes a screw rod rotatably connected to the bottom of the first box body, the screw rod is rotatably connected to the outer surface of the bottom side slide, the screw rod is threadedly connected to the second box body, and an elastic body is fixedly connected at the junction of the second box body and the first box body, and a synchronous wheel is fixedly connected to the side of the screw rod away from the second box body.

[0018] Preferably, the outer surface of the first box body is symmetrically rotatably connected with a hand wheel, the outer surfaces of the two hand wheels and the synchronous wheel are transmission-connected with a synchronous belt, and the elastomer is made of elastic material.

[0019] Preferably, a sealing strip is installed on the top edge of the first box body, a partition plate is fixedly connected to the inner wall of the first box body, and a sealing strip is also installed on the top of the partition plate.

[0020] Preferably, the diameter ratio of the limiting rod on the surface of the first box door and the limiting rod on the surface of the second box door is 1:0.7, the limiting rod on the surface of the first box door passes through the middle to form a limiting hole, and a limiting circular block is symmetrically fixedly connected to the inner wall on the top side of the first box body close to the synchronous wheel, and the shape of the limiting hole is adapted to the shape of the limiting circular block.

[0021] Preferably, the engaging block and the releasing block are both in the shape of a right-angled trapezoid, and the shapes of the two are adapted to each other, and the shape of the adapting groove at the bottom of the pressing block is also adapted to the shape of the releasing block.

[0022] Preferably, the first box can be installed between the driver and the co-driver in the car.

[0023] Preferably, a refrigeration element is provided inside the first box body, and the refrigeration element is electrically controlled and started by an external controller.

[0024] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention improves the inconvenience caused to the passengers by the door opening method of the vehicle refrigerator in the prior art through the clamping mechanism of the pressing block and the clamping block. The front passenger can press the pressing block and drive the clamping block and the sliding block to move, and then pull the first door and the second door to move, thereby achieving the purpose of opening. At the same time, the rear passenger can pull or push through the protrusions on the surface of the first door. Therefore, the semi-automatic door opening component takes into account the needs of both the front and rear passengers.

[0025] Compared with the prior art, the structural design of the present invention is more user-friendly. It not only solves the problem of front-seat passengers frequently turning around or leaning sideways to take and put items while driving or sitting as a co-pilot, but also takes into account the needs of rear-seat passengers. The refrigerator door can be opened and closed by a simple press operation, greatly improving the convenience and safety of operation.

[0026] In addition, on the basis of achieving the above-mentioned beneficial effects, the present invention also has the following advantages: first, when the operator presses the pressing block, the pressing block drives the locking block to move, and the locking block compresses the disengagement spring when encountering the release block, and then under the action of the elastic extension of the reset spring, the first box door and the second box door will automatically reset. By designing the first box door and the second box door to be semi-automatic reset, not only the operating process is simplified, but also the stability and safety of the use of the first box body are ensured.

[0027] Secondly, when the pressing block descends, the engaging hole will engage with the round protrusion. At this time, the passenger can sense through the pressing block that the first door and the second door have been opened. When they want to close them, they only need to press the pressing block again. Under the elastic action of the tension spring, the elastic force is greater than the engaging force of the engaging hole and the round protrusion, thereby resetting. Therefore, the engaging mechanism of the engaging hole and the round protrusion is convenient for the front passengers to operate, and improves convenience and practicality.

[0028] Thirdly, when the limiting circle block and the limiting hole are engaged, the first door and the second door remain open, and the rear passengers can operate them with both hands, that is, there is no need to worry about the first door and the second door being closed, which makes it easier for the rear passengers to operate the first box.

[0029] 2. The present invention allows the front passenger to rotate the hand wheel to rotate the screw rod. With the cooperation of the thread, the second box body moves toward the side close to the cup holder, thereby stretching the elastic body and expanding the capacity of the first box body, thereby solving the problem of fixed volume of the vehicle refrigerator in the prior art and improving the practicality and convenience of the refrigerator.

[0030] Compared with the prior art, the structural design of the present invention is simpler and more efficient. There is no need to carry additional refrigerator doors, which reduces the burden and space limitations inside the vehicle. The capacity of the refrigerator can be expanded through simple hand wheel operation, avoiding the complexity and inconvenience caused by frequent disassembly and installation of refrigerator doors, and also reducing the risk of damage to the refrigerator doors.

[0031] In addition, on the basis of achieving the above-mentioned beneficial effects, the present invention also has the following advantages: First, the bottom side slide not only provides sliding space for the second box body, but also can limit the second box body, thereby preventing excessive expansion and causing damage to the elastomer. Therefore, the bottom side slide and the screw rod ensure the stability and safety of the first box body during the expansion process, and avoid structural damage caused by excessive stretching.

[0032] Secondly, two hand wheels are designed to be connected through a synchronous belt and a synchronous wheel transmission, that is, both the left and right passengers in the front row can adjust them. This not only improves the convenience of operation, but also ensures the balance and stability of the refrigerator expansion process, avoiding the problem of inconvenience for passengers on one side to adjust.

[0033] Thirdly, the lateral expansion of the first box is achieved through the sliding of the second box and the stretching of the elastic body. Since the threads on the surface of the screw rod cooperate with the threads of the second box, the second box can remain stable, avoiding the problem of items inside the first box sliding or tipping over due to bumps during vehicle driving. At the same time, the lateral expansion not only increases the volume of the first box, but also ensures the stability and safety of the placement of items. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front three-dimensional schematic diagram of the main structure of the present invention.

[0035] Figure 2 It is a side perspective schematic diagram of the main structure of the present invention.

[0036] Figure 3 It is a sectional stereoscopic schematic diagram of the main structure of the present invention.

[0037] Figure 4 For the present invention Figure 3 Enlarged three-dimensional schematic diagram of the structure at point A in the middle.

[0038] Figure 5 For the present invention Figure 3 Enlarged three-dimensional schematic diagram of the structure at point B in the middle.

[0039] Figure 6 For the present invention Figure 3 Enlarged three-dimensional schematic diagram of the structure at point C in the middle.

[0040] Figure 7 It is a cross-sectional perspective schematic diagram of the semi-automatic door opening assembly of the present invention.

[0041] Figure 8 For the present invention Figure 7 Enlarged three-dimensional schematic diagram of the structure at point D in the middle.

[0042] Fig. 9 For the present invention Figure 7 Enlarged three-dimensional schematic diagram of the structure at E in the middle.

[0043] Fig.10 It is a partially cutaway perspective schematic diagram of the semi-automatic door opening assembly of the present invention.

[0044] In the figure: 11, first box; 12, bottom side slide plate; 13, cup holder; 14, second box.

[0045] 2. Semi-automatic door opening assembly; 21. L-shaped slide; 22. First door; 23. Second door; 24. Rotating shaft; 25. Pull block; 26. Sliding block; 27. Disengagement spring; 28. Snap-in block; 29. ​​Return spring; 210. External housing; 211. Tension spring; 212. Pressing block; 213. Release block.

[0046] 3. lateral expansion assembly; 31. screw rod; 32. elastic body; 33. synchronous wheel; 34. synchronous belt. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that the refrigeration components inside the first box body 11 are existing technologies, and the refrigeration elements can adopt relevant products available on the market. The structures and working principles of these products belong to the existing technologies and will not be described in detail here.

[0049] Embodiment 1: Figure 1 , Figure 2 as well as Figure 6 As shown, the variable vehicle-mounted expandable refrigerator includes a first box body 11, and the interior of the first box body 11 is provided with a semi-automatic door opening assembly 2 for facilitating the front passengers and the rear passengers to open the first box body 11. The semi-automatic door opening assembly 2 includes a first box door 22 and a second box door 23 for blocking the top of the first box body 11. The top of the first box door 22 is fixedly connected with a protrusion for facilitating the rear passengers to open the first box body 11. The inner wall of the first box body 11 is symmetrically provided with L-shaped slide grooves 21 for limiting the first box door 22 and the second box door 23.

[0050] like Figure 3, Figure 4 as well as Figure 6 As shown, the semi-automatic door opening assembly 2 also includes a rotating shaft 24, which is rotatably connected to the side of the first door 22 and the second door 23 that is close to each other, and a pulling block 25 is rotatably connected to the bottom of the second door 23 that is away from the first door 22, and a sliding block 26 is rotatably connected to the bottom of the pulling block 25, and a disengagement spring 27 is fixedly connected to the interior of the sliding block 26, and a clamping block 28 is fixedly connected to the end of the disengagement spring 27 that is away from the interior of the sliding block 26.

[0051] like Figure 3 , Figure 4 as well as Figure 5 As shown, a return spring 29 is fixedly connected between the bottom of the sliding block 26 and the bottom of the inner cavity of the first box body 11, the outer wall of the first box body 11 is fixedly connected to an external shell 210, the sliding block 26 is slidably connected to the inner surface of the external shell 210, the top of the inner cavity of the external shell 210 is fixedly connected to a tension spring 211, the bottom of the tension spring 211 is fixedly connected to a pressing block 212, and the bottom of the inner cavity of the external shell 210 is fixedly connected to a release block 213.

[0052] It should be noted that if Figures 7 to 10 As shown, an adapting groove is provided at the bottom of the pressing block 212, and a round protrusion is symmetrically fixedly connected to the inner surface of the external shell 210, and a snap-in hole is provided through the middle of the pressing block 212. As the pressing block 212 is continuously pressed, the snap-in hole on the surface of the pressing block 212 will snap into the round protrusion, and the side of the external shell 210 away from the first box body 11 is linearly equidistant and symmetrically installed with bristles, and the ends of the first box door 22 and the second box door 23 away from each other on both sides are fixedly connected to the limit rods, and the limit rods are slidably connected to the inside of the L-shaped slide 21, and the bending part of the L-shaped slide 21 is rounded, and the bottom of the first box body 11 is fixedly connected to the bottom of the first box body 11, and the end of the bottom side slide 12 away from the first box body 11 is fixedly connected to the cup holder 13, and the upper surface of the bottom side slide 12 is slidably connected to the second box body 14, and the first box body 11 Sealing strips are installed on the top edges, and a partition plate is fixedly connected to the inner wall of the first box body 11, and a sealing strip is also installed on the top of the partition plate. The diameter ratio of the limit rod on the surface of the first box door 22 and the limit rod on the surface of the second box door 23 is 1:0.7, and the limit rod on the surface of the first box door 22 runs through the middle to open a limit hole. The first box body 11 is symmetrically fixedly connected to the inner wall of the top side near the synchronous wheel 33, and the shape of the limit hole is compatible with the shape of the limit block. The clamping block 28 and the release block 213 are both in the shape of a right-angled trapezoid, and the shapes of the two are compatible with each other. The shape of the adapter groove at the bottom of the pressing block 212 is also compatible with the shape of the release block 213. The first box body 11 can be installed between the main and co-driver in the car. A refrigeration element is arranged inside the first box body 11, and the refrigeration element is electrically controlled to start with an external controller.

[0053] Specifically, the front passenger can control the opening and closing of the first door 22 and the second door 23 by pressing the pressing block 212. When the front passenger presses the pressing block 212, the tension spring 211 fixedly connected to the pressing block 212 in the external shell 210 is elastically stretched. At the same time, the pressing block 212 contacts the clamping block 28 and causes the sliding block 26 to slide synchronously toward the bottom of the first box body 11. Since the pulling block 25 is rotatably connected between the sliding block 26 and the second door 23, the movement of the sliding block 26 will drive the second door 23 to move downward through the pulling block 25. In addition, since the bend of the L-shaped slide groove 21 is rounded, under the pulling force of the pulling block 25 and the guidance of the L-shaped slide groove 21, the pulling block 25 pulls the second door 23 and the first door 22 to slide synchronously in the L-shaped slide groove 21 toward the bottom of the first box body 11.

[0054] As the pressing block 212 is continuously pressed, the engaging hole on the surface of the pressing block 212 will engage with the round protrusion. At this time, the front passenger will feel the engaging force between the engaging hole and the round protrusion blocking the pressure of the front passenger. At this time, the front passenger can release the pressing block 212 and take or store items in the first box body 11. During this process, the descent of the sliding block 26 compresses the return spring 29. Since the engaging block 28 is resisted by the pressing block 212 at this time, the return spring 29 is still in a compressed state.

[0055] After the front-row passenger has taken or stored something, the front-row passenger briefly presses the pressing block 212 again and makes it no longer engage with the round protrusion. At this time, the pressing block 212 contacts the engaging block 28, and the bottom of the engaging block 28 contacts the release block 213. Under the action of the inclined surface, the engaging block 28 is contacted by the release block 213 into the inside of the sliding block 26. At this time, the disengagement spring 27 elastically contracts, and the adapter groove at the bottom of the pressing block 212 cooperates with the top of the release block 213, so that the engaging block 28 loses external force and is no longer restricted. At this time, the return spring 29 elastically stretches and drives the sliding block 26 to move upward, and the sliding block 26 pushes the first box door 22 and the second box door 23 through the pulling block 25 to block the top of the first box body 11. Then, the front-row passenger can release the pressing block 212, and under the action of the elastic contraction of the tension spring 211, the pressing block 212 is reset.

[0056] For the rear passengers, they can manually push the protrusion on the surface of the first door 22 to move the first door 22 and the second door 23 downward along the track of the L-shaped slide groove 21. During this process, the limit rod on the surface of the first door 22 will be engaged with the limit circle. At this time, the rear passengers can take or store items, and then the rear passengers can pull the protrusion again to reset the first door 22 and the second door 23.

[0057] Therefore, the semi-automatic door opening assembly 2 not only solves the problem of the front passengers frequently turning around or leaning sideways to take and put items while driving or co-piloting, but also takes into account the needs of the rear passengers. The first door 22 and the second door 23 can be opened and closed by a simple pressing operation, which greatly improves the convenience and safety of operation.

[0058] Embodiment 2: Based on Embodiment 1, Figure 1 and Figure 3 As shown, a lateral expansion component 3 for expanding the capacity of the first box body 11 is provided at the bottom of the first box body 11, and the lateral expansion component 3 includes a screw rod 31 rotatably connected to the bottom of the first box body 11, the screw rod 31 is rotatably connected to the outer surface of the bottom side slide 12, the screw rod 31 is threadedly connected to the second box body 14, and an elastomer 32 is fixedly connected at the junction of the second box body 14 and the first box body 11, and a synchronous wheel 33 is fixedly connected to the side of the screw rod 31 away from the second box body 14.

[0059] It should be noted that the outer surface of the first box body 11 is symmetrically rotatably connected with a hand wheel, the outer surfaces of the two hand wheels and the synchronous wheel 33 are transmission-connected with a synchronous belt 34, and the elastic body 32 is made of elastic material, specifically polytetrafluoroethylene material.

[0060] Specifically, when more items need to be loaded into the first box 11, the front passenger only needs to manually turn the hand wheel, and the capacity expansion can be easily achieved through the transmission action of the synchronous belt 34. During this process, the synchronous wheel 33 located in the middle rotates and drives the screw rod 31 to rotate synchronously. With the cooperation of the thread, the second box 14 slides on the surface of the bottom slide plate 12 toward the side close to the cup holder 13, and the elastic body 32 is elastically stretched, thereby achieving the lateral expansion of the first box 11. Therefore, the structural design of the present invention is simpler and more efficient than the prior art, and there is no need to carry an additional refrigerator door, which reduces the burden and space limitation inside the vehicle. The capacity expansion of the first box 11 can be achieved through simple hand wheel operation, which avoids the complexity and inconvenience caused by frequent disassembly and installation of the refrigerator door, and also reduces the risk of damage to the refrigerator door. At the same time, the sliding of the second box 14 and the stretching of the elastic body 32 realize the lateral expansion of the first box 11, and with the cooperation of the thread on the surface of the screw rod 31 and the thread of the second box 14, the second box 14 can remain stable, avoiding the problem of sliding or tipping of the items inside the first box 11 due to bumps during driving of the vehicle. At the same time, the lateral expansion not only increases the volume of the first box 11, but also ensures the stability and safety of the placement of items.

[0061] It should be noted that polytetrafluoroethylene is a high-performance synthetic rubber material with excellent resistance to high temperatures, oil, chemical corrosion, stretching and good flexibility. Therefore, polytetrafluoroethylene is selected as the material of the elastomer 32 so that it can be perfectly used in the scenario of a car refrigerator. In addition, compared with a household refrigerator, the refrigeration temperature of a car refrigerator is usually only about -18°C, and polytetrafluoroethylene will not be damaged when it is in a stretched state and in an environment of -18°C. The long-term use temperature of polytetrafluoroethylene is far higher than -18°C. Therefore, polytetrafluoroethylene can be selected as the material of the elastomer 32.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable vehicle-mounted expandable refrigerator, comprising a first box (11), characterized in that: A semi-automatic door opening assembly (2) for facilitating front row passengers and rear row passengers to open the first box (11) is arranged inside the first box (11), the semi-automatic door opening assembly (2) comprising a first box door (22) and a second box door (23) for blocking the top of the first box (11), a convex piece for facilitating rear row passengers to open the first box (11) is fixedly connected to the top of the first box door (22), and L-shaped sliding grooves (21) for limiting the first box door (22) and the second box door (23) are symmetrically arranged on the inner wall of the first box (11); The semi-automatic door opening assembly (2) further comprises a rotating shaft (24), wherein the rotating shaft (24) is rotatably connected to a side of the first door (22) and the second door (23) that is close to each other, the second door (23) being closer to the vertical section of the L-shaped slide groove (21) than the first door (22), a pulling block (25) being rotatably connected to the bottom of the side of the second door (23) that is away from the first door (22), a sliding block (26) being rotatably connected to the bottom of the pulling block (25), a disengagement spring (27) being fixedly connected to the interior of the sliding block (26), and a clamping block (28) being fixedly connected to the end of the disengagement spring (27) that is away from the interior of the sliding block (26); A return spring (29) is fixedly connected between the bottom of the sliding block (26) and the bottom of the inner cavity of the first box body (11); the outer wall of the first box body (11) is fixedly connected to an external shell (210); the sliding block (26) is slidably connected to the inner surface of the external shell (210); a tension spring (211) is fixedly connected to the top of the inner cavity of the external shell (210); a pressing block (212) is fixedly connected to the bottom of the tension spring (211); and a release block (213) is fixedly connected to the bottom of the inner cavity of the external shell (210); An adapting groove is provided at the bottom of the pressing block (212), and a round protrusion is symmetrically fixedly connected to the inner surface of the external shell (210). A snap-in hole is provided through the middle of the pressing block (212). As the pressing block (212) is continuously pressed, the snap-in hole on the surface of the pressing block (212) will snap into the round protrusion. Brushes are linearly equidistant and symmetrically installed on one side of the external shell (210) away from the first box body (11). The ends of both sides of the first box door (22) and the second box door (23) away from each other are fixedly connected to limit rods, and the limit rods are slidably connected to the inside of the L-shaped slide groove (21), and the bending part of the L-shaped slide groove (21) is rounded. The shapes of the clamping block (28) and the releasing block (213) are both right-angled trapezoids, and the shapes of the two are mutually compatible, and the shape of the adapting groove at the bottom of the pressing block (212) is mutually compatible with the shape of the releasing block (213).

2. The variable vehicle-mounted expandable refrigerator according to claim 1, characterized in that: The bottom of the first box (11) is fixedly connected to a bottom side slide plate (12), one end of the bottom side slide plate (12) away from the first box (11) is fixedly connected to a cup holder (13), and the upper surface of the bottom side slide plate (12) is slidably connected to a second box (14).

3. The variable vehicle-mounted expandable refrigerator according to claim 1 is characterized in that: A lateral expansion assembly (3) for expanding the capacity of the first box (11) is arranged at the bottom of the first box (11), the lateral expansion assembly (3) comprising a screw rod (31) rotatably connected to the bottom of the first box (11), the screw rod (31) rotatably connected to the outer surface of the bottom side slide plate (12), the screw rod (31) being threadedly connected to the second box (14), an elastic body (32) being fixedly connected at the junction of the second box (14) and the first box (11), and a synchronous wheel (33) being fixedly connected to the side of the screw rod (31) away from the second box (14).

4. The variable vehicle-mounted expandable refrigerator according to claim 3 is characterized in that: The outer surface of the first box body (11) is symmetrically rotatably connected to a hand wheel, and the outer surfaces of the two hand wheels and the synchronous wheel (33) are transmission-connected to a synchronous belt (34).

5. The variable vehicle-mounted expandable refrigerator according to claim 1 is characterized in that: The top edge of the first box body (11) is equipped with a sealing strip, the inner wall of the first box body (11) is fixedly connected with a partition plate, and the top of the partition plate is equipped with a sealing strip.

6. The variable vehicle-mounted expandable refrigerator according to claim 3 is characterized in that: The diameter ratio of the limiting rod on the surface of the first door (22) to the limiting rod on the surface of the second door (23) is 1:0.7, the limiting rod on the surface of the first door (22) passes through the middle to form a limiting hole, and a limiting circular block is symmetrically fixedly connected to the inner wall of the top side of the first box body (11) close to the synchronous wheel (33), and the shape of the limiting hole and the shape of the limiting circular block are mutually adapted.

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