Refrigeration device

Abstract

The utility model provides a refrigerating device which comprises a box body, a shell outside the refrigerating device is formed by the box body, and a refrigerating chamber with an opening in the front side is arranged in the box body. One side of the door body is rotationally connected to the box body through a rotating shaft so as to cover the front side opening; a limiting groove is formed in the side, away from the rotating shaft, of the door body. The door lock assembly is arranged on the peripheral side wall of the opening in the front side of the box body, and the door lock assembly comprises a limiting ball movably arranged on the peripheral side wall of the opening in the front side of the box body; the elastic piece abuts against the limiting bead so as to drive the limiting bead to be arranged on the peripheral side wall of the opening in the front side of the box body in a protruding mode; in the closing process of the door body, the side, away from the rotating shaft, of the door body can abut against the limiting bead, so that the elastic piece is compressed by the limiting bead; after the door body is closed, the limiting groove and the limiting bead are arranged oppositely, the elastic piece can drive the limiting bead to move towards the interior of the limiting groove, the limiting bead is clamped in the limiting groove, and the door body is more stable and smoother in the closing process through the arrangement of the elastic piece and the limiting bead.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature refrigeration, mainly to a refrigeration device. Background Art

[0002] A refrigerator is a device that keeps food or other items at a constant low temperature. An ultra-low temperature freezer is a type of refrigerator that operates at even lower temperatures. Ultra-low temperature freezers are often used for low-temperature testing of electronic devices and specialized materials, as well as for the cryogenic storage of plasma, biomaterials, vaccines, reagents, biological products, chemical reagents, bacterial strains, and biological samples.

[0003] In the prior art, an ultra-low temperature refrigerator includes a cabinet, an outer door, and an inner door. The inner door is arranged on the inner side of the outer door, which can effectively reduce the exchange of external heat and the coldness inside the refrigerator when the door is opened.

[0004] At present, most of the inner doors of ultra-low temperature refrigerators use a latch-type structure to cooperate with the door frame to close the door, which easily causes the door body to sag and deform, and then leads to the problem of failure of the inner door to close, affecting the refrigeration and insulation effects of the ultra-low temperature refrigerator and affecting its performance. Utility Model Content

[0005] Based on the problem in the prior art that the matching structure between the inner door and the door frame of a low-temperature refrigerator is prone to deformation and failure, thereby affecting the heat preservation effect, a refrigeration device is provided.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In one aspect of the present application, a refrigeration device comprises: a housing forming an outer shell of the refrigeration device, a refrigeration compartment having a front opening being provided inside the housing; a door, one side of the door being rotatably connected to the housing via a rotating shaft so as to cover the front opening; a limiting groove being provided on a side of the door away from the rotating shaft; a door lock assembly provided on a peripheral side wall of the front opening of the housing, the door lock assembly comprising: a limiting bead movably provided on the peripheral side wall of the front opening of the housing; an elastic member abutting against the limiting bead to drive the limiting bead to protrude from the peripheral side wall of the front opening of the housing; wherein, during closing of the door, the side of the door away from the rotating shaft can abut against the limiting bead, causing the limiting bead to compress the elastic member; and when the door is closed, the limiting groove is arranged opposite to the limiting bead, and the elastic member can drive the limiting bead to move toward the limiting groove so that the limiting bead is engaged in the limiting groove.

[0008] In the present application, a door lock assembly including an elastic member and a limiting bead is provided, wherein the elastic force of the elastic member enables the door lock assembly to better adapt to door bodies of different sizes and weights, as well as slight deformations or deviations under different usage conditions, so that the door body is more stable and smooth during the closing or opening process. In the process of the door body moving toward the opening to close the door body, since the limiting bead slides along the door body under the action of the elastic member, the door body has a certain buffering and self-adaptation ability during the closing process. Even if there is a certain deviation or uneven force when the user closes the door body, the limiting bead can smoothly slide into the limiting groove under the action of the elastic force. When the door body is closed, the elastic member can automatically adjust the position and force of the limiting bead so that the door body can fit tightly against the peripheral side wall of the front opening to achieve reliable locking.

[0009] In some embodiments of the present application, a refrigeration device is provided, wherein a slide groove is recessed on the side wall of the door body, the slide groove and the limit groove are located on the same side wall of the door body, and the slide groove extends along the front and rear directions of the door body; the front end of the slide groove is connected to the limit groove, and the rear end of the slide groove extends to the inner side of the door body; during the closing process of the door body, the limit bead can slide along the slide groove into the limit groove.

[0010] Another technical solution among the above technical solutions has the following advantages or beneficial effects: by extending the chute along the front-to-back direction of the door body, wherein the limiting groove is located at the front end of the chute, and the rear end of the chute can extend to the inner side of the door body, so that when the door body is closed over the front opening, the limiting bead can slide along the chute into the limiting groove. The arrangement of the chute enables the limiting bead to move along a predetermined trajectory during the closing or opening of the door body. On the other hand, the rear end of the chute extending to the inner side of the door body can increase the buffer distance during the closing process of the door body, making the closing of the door body smoother and softer.

[0011] In some embodiments of the present application, a refrigeration device is provided, wherein the depth of the chute gradually decreases in a direction from the rear end of the chute toward the front end of the chute.

[0012] Another technical solution among the above technical solutions has the following advantages or beneficial effects: during the door closing process, the gradually decreasing depth of the chute guides the limiting bead to slide more smoothly and ultimately accurately engage with the limiting groove. Moreover, as the chute depth gradually decreases, the limiting bead is subjected to gradually increasing pressure during the sliding process, causing the elastic member to generate a stronger elastic force, which is conducive to the limiting bead being tightly engaged with the limiting groove when it reaches it, thereby enhancing the stability and reliability of the door locking, allowing the door to fit tightly against the peripheral side wall of the front opening when closing the front opening, thereby improving the sealing and heat preservation performance of the low-temperature refrigerator.

[0013] In some embodiments of the present application, a refrigeration device is provided, wherein the side wall of the door body is provided with an inclined surface, the inclined surface and the limiting groove are located on the same side wall of the door body, one side of the inclined surface is connected to the limiting groove, and the other side of the inclined surface extends to the inner side of the door body, and in the direction along the limiting groove toward the inner side of the door body, the inclined surface is inclined toward the direction close to the center of the door body.

[0014] Another technical solution among the above technical solutions has the following advantages or beneficial effects: the inclination direction of the inclined surface is set to be along the direction from front to back of the door body, and the inclination direction of the inclined surface is inclined toward the center of the door body, so that when the door body is closing the front opening, the spacing between the inclined surface and the door lock assembly changes from large to small as the door is closed. This not only reduces the resistance when the door body and the door lock assembly start to contact, but also gradually guides the limiting beads to slide smoothly into the limiting groove. Moreover, under the guidance of the inclined surface, it is beneficial for the limiting beads to fit tightly into the limiting groove, thereby reducing the gap between the door body and the box body, and improving the insulation effect of the low-temperature refrigerator.

[0015] In some embodiments of the present application, a refrigeration device is provided, wherein the door lock assembly includes a mounting seat, which is arranged on the peripheral side wall of the front opening of the box body, and a telescopic cavity is provided in the mounting seat, and a telescopic opening is provided on the side of the telescopic cavity facing the front opening, and the telescopic opening is connected to the telescopic cavity; the elastic member and the limiting bead are respectively installed in the telescopic cavity, and the elastic member can drive the limiting bead to protrude out of the telescopic opening and protrude out of the peripheral side wall of the front opening of the box body.

[0016] Another technical solution of the above technical solution has the following advantages or beneficial effects: by providing a mounting base, the elastic member and the retaining bead can be separately installed inside the mounting base, allowing the elastic member and the retaining bead to move freely within a certain space. The mounting base, the elastic member, and the retaining bead are designed as independent modules, facilitating installation of the door lock assembly. At the same time, the mounting base can effectively reduce loosening and wear of the elastic member and the retaining bead during use.

[0017] In some embodiments of the present application, a refrigeration device is provided, wherein the diameter of the telescopic opening is smaller than the diameter of the limiting bead; and the diameter of the telescopic cavity gradually increases from the telescopic opening toward the interior of the telescopic cavity.

[0018] Another technical solution of the above technical solution has the following advantages or beneficial effects: by designing the diameter of the telescopic opening to be smaller than the diameter of the retaining bead, the retaining bead cannot completely escape from the telescopic cavity directly through the telescopic opening under normal conditions, thus preventing the retaining bead from detaching from the mounting seat and affecting the normal function of the door lock assembly. Furthermore, because the spherical structure of the retaining bead gradually increases in diameter from both ends to the center, the gradually increasing diameter of the retaining bead as it slides along the telescopic cavity facilitates the retaining bead's smooth insertion into the interior of the telescopic cavity.

[0019] In some embodiments of the present application, a refrigeration device is provided, wherein the box body is provided with a door frame, and the door lock assembly is arranged on the door frame; the door frame includes a first frame side and a second frame side arranged vertically opposite to each other, the door body is rotatably connected to the first frame side, and the door lock assembly is arranged on the second frame side; the second frame side includes a first side wall, a second side wall and a connecting wall; the first side wall forms the rear end of the side wall of the front opening; the second side wall forms the front end of the side wall of the front opening, and the second side wall is located on the side of the first side wall away from the front opening; the connecting wall is connected between the first side wall and the second side wall, and the connecting wall and the second side wall enclose an installation space toward the side of the front opening; the mounting seat is installed in the installation space.

[0020] Another technical solution of the above technical solution has the following advantages or beneficial effects: In this way, the first side wall, the connecting wall, and the second side wall can form a stepped structure, so that the first side wall, the connecting wall, and the second side wall enclose an installation space for accommodating the door lock assembly. When the door body is closed on the front opening, the door body cooperates with the front end of the peripheral side wall of the front opening to form a locking structure, and the inner side of the door body can be tightly attached to the first side wall, thereby preventing the cooling energy in the refrigeration room from leaking through the cooperation structure between the door body and the door lock, further improving the cooling and heat preservation effect in the refrigeration room.

[0021] In some embodiments of the present application, a refrigeration device is provided, the mounting seat includes two telescopic cavities, the door lock assembly includes two limiting beads and two elastic parts, and a limiting bead and an elastic part are correspondingly arranged in the telescopic cavity; the door body is provided with two limiting grooves; when the door body is closed, the limiting grooves are arranged in one-to-one correspondence with the limiting beads, and the limiting grooves are arranged at intervals along the height direction of the door body.

[0022] Another technical solution of the above technical solution has the following advantages or beneficial effects: because the mounting base is provided with two telescopic cavities and two stop beads, and the door body is provided with two stop grooves, the door lock assembly has greater stability and reliability when locking the door body. Moreover, the stop grooves are arranged at intervals along the height of the door body, and the stop beads are correspondingly arranged at intervals along the height of the door body, so that the door body can be more evenly stressed when closed, reducing deformation or damage caused by uneven stress.

[0023] In some embodiments of the present application, a refrigeration device is provided, the door lock assembly also includes an adjusting member, the mounting seat is provided with a limiting cavity, the limiting cavity is communicated with the telescopic cavity, the adjusting member is movably arranged in the limiting cavity, and the end of the elastic member away from the limiting bead rests on the adjusting member; the adjusting member can move along the depth direction of the limiting cavity to adjust the distance between the adjusting member and the limiting bead.

[0024] Another technical solution of the above-mentioned technical solution has the following advantages or beneficial effects: by providing a limit cavity on the mounting base, a movable space is provided for the adjusting member, allowing the adjusting member to move within the limit cavity, thereby adjusting the distance between the adjusting member and the limit bead. In this way, the locking force of the door lock assembly can be adjusted by the adjusting member, and the user can more flexibly control the locking and unlocking process of the door lock according to the usage conditions of the door body during use.

[0025] In some embodiments of the present application, a refrigeration device is provided, wherein the circumferential side wall of the limiting cavity is provided with an internal thread, and the internal thread extends along the depth direction of the limiting cavity; the outer circumferential wall of the adjusting member is provided with an external thread, and the adjusting member is threadedly connected to the circumferential side wall of the limiting cavity; the adjusting member can rotate forward or reverse so that the adjusting member moves along the depth direction of the limiting cavity toward or away from the limiting bead.

[0026] Another technical solution of the above technical solution has the following advantages or beneficial effects: when the adjusting member is rotated forward or reverse, the adjusting member can move along the depth direction of the stopper cavity toward or away from the stopper bead, allowing the operator to adjust the distance between the adjusting member and the stopper bead by simply rotating the adjusting member. In this way, before installing the door lock assembly in the door frame, the locking force of the door lock can be adjusted by rotating the adjusting member forward or reverse, that is, clockwise or counterclockwise.

[0027] In some embodiments of the present application, a refrigeration device is provided, wherein a limiting column is protruded from one end of the adjusting member close to the elastic member, and the elastic member is sleeved on the limiting column and rests on the end face of the adjusting member facing the elastic member.

[0028] Another technical solution of the above-mentioned technical solution has the following advantages or beneficial effects: by providing a limiting post at the end of the adjusting member adjacent to the elastic member, the portion of the elastic member extending into the limiting cavity can be mounted on the limiting post and abut against the end surface of the adjusting member facing the elastic member. In this way, the limiting post can stabilize the elastic member when subjected to external forces, and the elastic member can maintain its shape and position during expansion and contraction, thereby improving the overall stability and reliability of the door lock assembly.

[0029] In some embodiments of the present application, a refrigeration device is provided, which further includes an outer door, which is arranged on the outside of the door body, and one side of the outer door is rotatably connected to the box body to cover the outside of the door body.

[0030] Another technical solution among the above technical solutions has the following advantages or beneficial effects: by arranging an outer door on the outside of the door body, when the front opening of the door body is closed, the outer door is covered on the outside of the door body, which can further improve the thermal insulation performance of the refrigeration device and avoid leakage of cold air in the refrigeration room. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1 A schematic diagram of a refrigeration device according to an embodiment of the present application;

[0033] Figure 2 for Figure 1 Schematic diagram of door closing;

[0034] Figure 3 for Figure 2 A local enlarged view of point A;

[0035] Figure 4 for Figure 2 Schematic diagram of door opening;

[0036] Figure 5 for Figure 2 A cross-sectional schematic diagram of;

[0037] Figure 6 for Figure 5 A partial enlarged view of point B;

[0038] Figure 7 for Figure 4 A partial enlarged view of point C;

[0039] Figure 8 for Figure 2 A schematic diagram of a door lock assembly;

[0040] Figure 9 for Figure 8 A cross-sectional schematic diagram of;

[0041] Figure 10 for Figure 8 An exploded view of

[0042] Figure 11 for Figure 2 Schematic diagram of the door frame in ;

[0043] Figure 12 for Figure 11 A partial enlarged view of point D.

[0044] The corresponding relationship between the reference numerals and component names is as follows:

[0045] 1 box body, 101 front opening, 11 exterior door, 12 door handle;

[0046] 2 door body, 201 limiting groove, 202 slide groove, 21 inclined surface;

[0047] 3 door lock assembly, 301 telescopic cavity, 302 telescopic opening, 303 perforation, 304 limiting cavity, 31 limiting bead, 32 elastic member, 33 mounting seat, 34 adjusting member, 35 limiting column;

[0048] 4 door frame, 401 connecting hole, 402 installation space, 41 first frame edge, 42 second frame edge, 421 first side wall, 422 second side wall, 423 connecting wall. DETAILED DESCRIPTION

[0049] The present invention provides a refrigeration device. To make the purpose, technical solution, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0052] The refrigeration device in the embodiment of the present invention can be a refrigeration cabinet such as a freezer or a refrigerator. The following takes a low-temperature refrigerator as an example to describe in detail the technical solution for improving the refrigeration device in the embodiment of the present invention.

[0053] Figure 1 FIG. 1 is a schematic diagram of a refrigeration device according to an embodiment of the present application.

[0054] See also Figure 1 As shown, the low-temperature refrigerator provided by the embodiment of the present invention may include a housing 1. The housing 1 may be a hollow structure such as a rectangular parallelepiped. The housing 1 forms the outer shell of the refrigerator. It should be noted that the housing 1 may also be a hollow shell structure of other shapes.

[0055] In some embodiments, a refrigeration compartment with a front opening 101 may be provided inside the box body 1. The refrigeration compartment may be provided as a plurality of refrigeration compartments.

[0056] In some embodiments, multiple refrigeration compartments can function as independent storage spaces, such as freezers, refrigerators, and temperature-controlled chambers. These compartments can meet varying cooling requirements, such as freezing, refrigeration, and temperature-controlled storage, depending on the type of goods being stored. These compartments can be arranged vertically or horizontally.

[0057] See also Figure 1 As shown, in some embodiments, the refrigerator may include an outer door 11. The outer door 11 may be hinged to the front side of the cabinet 1 to open and close the refrigeration compartment.

[0058] It should be noted that multiple outer doors 11 can be provided. The outer doors 11 can be provided one-to-one with the refrigeration compartments. Multiple outer doors 11 can simultaneously open and close one refrigeration compartment. One outer door 11 can also simultaneously open and close multiple refrigeration compartments.

[0059] Figure 2 for Figure 1 Schematic diagram of door closing.

[0060] See also Figure 2As shown, in some embodiments, the refrigerator may include a door body 2. The door body 2 may be arranged on the inner side of the outer door 11. The door body 2 may be hinged to the front side of the box body 1 to open and close the refrigeration compartment.

[0061] It should be noted that multiple door bodies 2 can be provided. Door bodies 2 can be provided one-to-one with refrigeration compartments. Multiple door bodies 2 can simultaneously open and close a refrigeration compartment. One door body 2 can also simultaneously open and close multiple refrigeration compartments.

[0062] In some embodiments, an outer door 11 can be provided on the outside of the door body 2. One side of the outer door 11 can be rotatably connected to the housing 1 to cover the outside of the door body 2. By providing the outer door 11 on the outside of the door body 2, when the front opening of the door body 2 is closed, the outer door 11 can be closed on the outside of the door body, thereby further improving the thermal insulation performance of the refrigeration unit and preventing cold leakage in the refrigerated room.

[0063] In some embodiments, the door body 2 and the outer door 11 can be rotatably connected to the same side of the box body.

[0064] like Figure 2 As shown, in some embodiments, the door body 2 may be provided with a door handle 12. The door handle 12 may provide a fulcrum for a user to move the door body 2.

[0065] like Figure 2 As shown, in some embodiments, the door handle 12 can be formed by being recessed in the door body 2. This can avoid interference with the outer door 11.

[0066] In some embodiments, the refrigerator may include a refrigeration system. The refrigeration system may be arranged inside the box body 1. The refrigeration system may be used to provide cold air inside the refrigerator to maintain a low temperature environment in each storage compartment.

[0067] In some embodiments, the refrigeration system may include a compressor (not shown). The compressor can serve as the power source of the refrigeration cycle, sucking in low-temperature, low-pressure refrigerant gas and compressing it into high-temperature, high-pressure gas. The compressor can deliver the high-temperature, high-pressure refrigerant to the condenser.

[0068] In some embodiments, the refrigeration system may include a condenser (not shown). The compressor may deliver compressed refrigerant to the condenser. The condenser may condense high-temperature and high-pressure refrigerant vapor.

[0069] In some embodiments, the refrigeration system may include a throttling device (not shown). The condenser may deliver the condensed refrigerant to the throttling device. The throttling device may be a capillary tube. The throttling device may be used to throttle and reduce the pressure of the refrigerant.

[0070] In some embodiments, the refrigeration system may include an evaporator (not shown). A throttling device may deliver the throttled and depressurized refrigerant to the evaporator. The evaporator may be used to evaporate and boil the refrigerant vapor to absorb heat from the surrounding medium.

[0071] In some embodiments, the compressor, the condenser, the throttling device, and the evaporator may be sequentially connected to form a refrigeration circuit, in which a refrigerant may circulate to cool the interior of the cabinet 1 .

[0072] In some embodiments, a press chamber (not shown) may be provided within the housing 1. The press chamber may be located in the bottom area of the housing 1. The press chamber may be located below the rear side of the storage compartment. A compressor, condenser, throttling device, etc. may be located within the press chamber.

[0073] In some embodiments, an evaporator compartment (not shown) may be provided within the housing 1. An evaporator may be provided within the evaporator compartment. The evaporator absorbs heat from the evaporator compartment, generating a large amount of cold air within the evaporator compartment. This cold air is transported to the storage compartment, enabling low-temperature storage within the storage compartment.

[0074] In some embodiments, an air duct assembly may be provided in the housing 1. An air supply duct (not shown) may be formed in the air duct assembly. The air supply duct may connect the evaporator and the refrigeration compartment to deliver cold air into the refrigeration compartment, thereby achieving a low-temperature storage function in the refrigeration compartment.

[0075] Figure 3 for Figure 2 A local enlarged view of point A; Figure 4 for Figure 2 Schematic diagram of the door opening.

[0076] like Figure 3 and Figure 4 As shown, in some embodiments, one side of the door body 2 can be rotatably connected to the box body 1 via a rotating shaft to cover the front opening 101. Specifically, the door body 2 can rotate around the axis of the rotating shaft to open and close the door body 2, thereby opening and closing the front opening 101.

[0077] It should be noted that, in other embodiments, the door body 2 can be configured as a sliding door structure.

[0078] like Figure 2 and Figure 3 As shown, in some embodiments, a low-temperature refrigerator may include a door lock assembly 3. The door lock assembly 3 may be disposed on a peripheral sidewall of the front opening 101 of the refrigerator body 1. The door lock assembly 3 can automatically lock the door body 2 when closed, preventing the door body 2 from being accidentally opened and protecting the items in the refrigeration compartment from external interference or damage.

[0079] In some embodiments, the low-temperature refrigerator may include multiple door lock assemblies 3. The door body 2 may be provided in multiple numbers. The multiple door bodies 2 and the multiple door lock assemblies 3 may be provided in a one-to-one correspondence.

[0080] In some other embodiments, the low-temperature refrigerator may include multiple door lock assemblies 3. The same door body 2 may be correspondingly provided with multiple door lock assemblies 3.

[0081] Figure 5 for Figure 2 A cross-sectional schematic diagram of; Figure 6 for Figure 5 A partial enlarged view of point B.

[0082] like Figure 5 and Figure 6 As shown, in some embodiments, a retaining groove 201 may be provided on a side of the door body 2 away from the rotation axis. The retaining groove 201 can be adapted to mate with the door lock assembly 3. The door lock assembly 3 can be disposed on a side of the peripheral wall of the front opening 101 near the side of the door body 2 where the retaining groove 201 is provided. The door lock assembly 3 can engage with the retaining groove 201, thereby locking the door body 2 to the front opening 101.

[0083] like Figure 3 and Figure 6 As shown, in some embodiments, the door lock assembly 3 may include a limiting bead 31. The limiting bead 31 may be movably set on the peripheral side wall of the front opening 101 of the box body 1. Particularly, by movably setting the limiting bead 31 on the peripheral side wall of the front opening 101, the limiting bead 31 can be flexibly adjusted according to the position and state of the door body 2. During the closing process of the door body 2, the limiting bead 31 can move with the movement of the door body 2 and be embedded in the limiting groove 201 at an appropriate position. The movably set limiting bead 31 can facilitate the alignment with the limiting groove 201 during the process of locking the door body 2 in the front opening 101, thereby improving the reliability of the locking.

[0084] like Figure 6 As shown, in some embodiments, the side of the limiting bead 31 facing the front opening 101 may have an arc surface. In this way, during the closing process of the door body 2, the arc surface has better guidance, and the door body 2 can contact the limiting bead 31 more smoothly during the closing process.

[0085] In some embodiments, the retaining bead 31 can be a steel ball. The high hardness of the steel ball allows the retaining bead 31 to withstand the impact and friction of the door body 2 when closing, without being easily worn or deformed. Furthermore, the steel ball's high wear resistance allows it to maintain its shape and function over long periods of use, thereby extending the service life of the door lock assembly 3.

[0086] like Figure 6As shown, in some embodiments, the door lock assembly 3 may include an elastic member 32. The elastic member 32 may abut against the retaining bead 31 to force the retaining bead 31 to protrude from the peripheral sidewall of the front opening 101 of the housing 1. The elastic member 32 may be located between the retaining bead 31 and the peripheral sidewall of the front opening 101. The elastic force generated by the elastic deformation of the elastic member 32 may force the retaining bead 31 to engage with the retaining groove 201, thereby locking the door 2.

[0087] In the process of closing the door body 2 , the side of the door body 2 away from the rotation axis can abut against the limiting bead 31 , so that the limiting bead 31 compresses the elastic member 32 .

[0088] Specifically, if Figure 4 As shown, when the door body 2 is in the open state, the limiting bead 31 can be protruded on the side wall of the front opening 101 of the box body 1 under the action of the elastic member 32. When the door body 2 begins to close, the side of the door body 2 away from the rotation axis, which may also refer to the side of the door body 2 away from the rotation axis, contacts the limiting bead 31. As the door body 2 continues to close, the door body 2 and the limiting bead 31 are pressed against each other and then apply pressure to the limiting bead 31, so that the limiting bead 31 compresses the elastic member 32. During this process, the elastic member 32 begins to deform and store elastic potential energy. At the same time, the position of the limiting bead 31 also changes, and the limiting bead 31 gradually changes from a state of protruding from the box body 1 to a state of being flush with or slightly concave to the surface of the side wall of the front opening 101.

[0089] It should be noted that the elastic member 32 is compressed to generate a pre-tightening force, which helps the door body 2 to be closely attached to the peripheral side wall of the front opening 101.

[0090] When the door body 2 is closed, the limiting groove 201 is arranged opposite to the limiting bead 31. The elastic member 32 can drive the limiting bead 31 to move toward the limiting groove 201, so that the limiting bead 31 is engaged in the limiting groove 201.

[0091] Specifically, if Figure 6 As shown, when the door body 2 is fully closed, the limiting groove 201 on the door body 2 and the limiting bead 31 can be in relative positions. At this time, the elastic member 32 begins to release the elastic potential energy stored previously. Since the limiting bead 31 is in a position directly opposite to the limiting groove 201, the elastic force of the elastic member 32 can drive the limiting bead 31 to move into the limiting groove 201, and finally the limiting bead 31 is engaged with the limiting groove 201, so that the door body 2 is locked in the position of closing the front opening 101.

[0092] In the prior art, most inner doors of ultra-low temperature refrigerators use a snap-on structure to cooperate with the door frame 4 to close the door, which easily causes the door body 2 to sag and deform, thereby leading to the problem of failure of the inner door to close, affecting the refrigeration and insulation effects of the ultra-low temperature refrigerator and affecting its performance.

[0093] In the low-temperature refrigerator disclosed in the present application, a door lock assembly 3 including an elastic member 32 and a retaining bead 31 is provided. The elastic force of the elastic member 32 enables the door lock assembly 3 to better adapt to door bodies 2 of different sizes and weights, as well as slight deformations or deviations under different usage conditions, making the door body 2 more stable and smooth during opening or closing, and also reducing the impact force generated by the door body 2 during closing. As the door body 2 moves toward the opening to close, the retaining bead 31 slides along the door body 2 under the action of the elastic member 32, giving the door body 2 a certain degree of buffering and adaptive capabilities during the closing process. Even if there is a certain deviation or uneven force when the user closes the door body 2, the retaining bead 31 can slide smoothly into the retaining groove 201 under the action of the elastic force. When the door body 2 is closed, the elastic member 32 can automatically adjust the position and force of the retaining bead 31 so that the door body 2 can fit tightly against the peripheral wall of the front opening 101, achieving reliable locking.

[0094] like Figure 6 As shown, in some embodiments, the elastic member 32 may be a spring. The spring has a simple structure and good elastic deformation capability.

[0095] It should be noted that in other embodiments, the elastic member 32 can be made of an elastic material such as rubber or silicone. Elastic materials such as rubber or silicone can provide the required restoring force through their inherent elasticity. For example, the elastic member 32 can be a rubber block, one end of which is fixed to the housing 1 and the other end contacts the retaining bead 31. When the door 2 is closed, the rubber block is compressed and then releases energy after the door 2 is closed, pushing the retaining bead 31 into the retaining groove 201.

[0096] Figure 7 for Figure 4 A partial enlarged view of point C.

[0097] like Figure 4 and Figure 7 As shown, in some embodiments, a side wall of the door body 2 may be recessed with a slide groove 202. The slide groove 202 and the retaining groove 201 may be located on the same side wall of the door body 2. The slide groove 202 may extend along the front-to-back direction of the door body 2. The front end of the slide groove 202 may communicate with the retaining groove 201. The rear end of the slide groove 202 may extend to the inner side of the door body 2. During the closing process of the door body 2, the retaining bead 31 may slide along the slide groove 202 into the retaining groove 201.

[0098] Specifically, the chute 202 extends along the front-to-back direction of the door body 2, that is, the chute 202 extends along the direction of opening and closing of the door body 2. The limiting groove 201 is located at the front end of the chute 202, and the rear end of the chute 202 can extend to the inner side of the door body 2. In this way, when the door body 2 covers the front opening 101, the limiting bead 31 can slide along the chute 202 into the limiting groove 201. The arrangement of the chute 202 enables the limiting bead 31 to move along a predetermined trajectory during the closing or opening of the door body 2. On the other hand, the rear end of the chute 202 extending to the inner side of the door body 2 can increase the buffer distance during the closing process of the door body 2, making the closing of the door body 2 more stable and gentle.

[0099] Furthermore, when the door body 2 needs to be opened, the door body 2 can be pulled outward, and the side wall of the door body 2 exerts force on the limiting bead 31 and the elastic member 32, so that the limiting bead 31 can be separated from the limiting groove 201 and slide along the slide groove 202 until it slides to the rear end of the slide groove 202, and then the door body 2 opens the front opening 101. Under the guidance of the slide groove 202, the process of opening the door body 2 can be made smoother.

[0100] like Figure 7 As shown, in some embodiments, the shape of the sliding groove 202 can be an elongated strip. The longitudinal direction of the sliding groove 202 can be extended along the front-to-back direction of the door body 2.

[0101] In some embodiments, the depth of the chute 202 may gradually decrease from the rear end of the chute 202 toward the front end of the chute 202 .

[0102] The depth of the chute 202 at the rear end of the chute 202 is greater than that at the front end of the chute 202, so that the space between the chute 202 and the door lock assembly 3 decreases as the door is closed. During the closing process of the door body 2, the gradually decreasing depth of the chute 202 guides the limiting bead 31 to slide more smoothly and eventually accurately snap into the limiting groove 201. Moreover, as the depth of the chute 202 gradually decreases, the limiting bead 31 is subjected to gradually increasing pressure during the sliding process, causing the elastic member 32 to generate a stronger elastic force, which helps the limiting bead 31 to be tightly snapped into the limiting groove 201 when it reaches the limiting groove 201, thereby enhancing the stability and reliability of the locking of the door body 2. When the front opening 101 is closed, the door body 2 can be tightly attached to the peripheral side wall of the front opening 101, thereby improving the sealing and heat preservation performance of the low-temperature refrigerator.

[0103] In some embodiments, the depth of the chute 202 gradually decreases from the rear end toward the front end, wherein the decrease in the depth of the chute 202 may be linear or gradual.

[0104] like Figure 6As shown, in some embodiments, the side wall of the door body 2 may be provided with an inclined surface 21. The inclined surface 21 and the limiting groove 201 may be located on the same side wall of the door body 2. One side of the inclined surface 21 may be connected to the limiting groove 201. The other side of the inclined surface 21 may extend to the inner side of the door body 2. In the direction along the limiting groove 201 toward the inner side of the door body 2, the inclined surface 21 may be inclined toward the center of the door body 2.

[0105] In this embodiment, an inclined surface 21 is provided on the side wall of the door body 2, one side of the inclined surface 21 is connected to the limiting groove 201, and the other side extends to the inner side of the door body 2, and the inclination direction of the inclined surface 21 is set to be along the direction from front to back of the door body 2, and the inclination direction of the inclined surface 21 is inclined toward the center of the door body 2, so that when the door body 2 closes the front opening 101, the interval space between the inclined surface 21 and the door lock assembly 3 becomes smaller as the door is closed. This not only reduces the resistance when the door body 2 and the door lock assembly 3 start to contact, but also gradually guides the limiting bead 31 to slide smoothly into the limiting groove 201. Moreover, under the guidance of the inclined surface 21, it is beneficial for the limiting bead 31 to fit tightly into the limiting groove 201, thereby reducing the gap between the door body 2 and the box body 1 and improving the insulation effect of the low-temperature refrigerator.

[0106] Figure 8 for Figure 2 A schematic diagram of a door lock assembly; Figure 9 for Figure 8 A cross-sectional schematic diagram of; Figure 10 for Figure 8 An exploded view of .

[0107] like Figure 3 and Figure 8 As shown, in some embodiments, the door lock assembly 3 may include a mounting base 33. The mounting base 33 may be disposed on the peripheral sidewall of the front opening 101 of the housing 1. The elastic member 32 and the retaining bead 31 may be mounted within the mounting base 33. By providing the mounting base 33, the mounting base 33, the elastic member 32, and the retaining bead 31 are designed as independent modules, facilitating installation of the door lock assembly 3. Furthermore, the mounting base 33 can effectively reduce loosening and wear of the elastic member 32 and the retaining bead 31 during use.

[0108] It should be noted that, in some other embodiments, the door lock assembly 3 can be installed between the peripheral side wall of the front opening 101 and the box body. The limiting bead 31 can be installed in the door lock assembly 3 and protrude outward from the peripheral side wall of the front opening 101.

[0109] like Figure 6 and Figure 9As shown, in some embodiments, a telescopic cavity 301 may be defined within the mounting base 33. A telescopic opening 302 may be defined on the side of the telescopic cavity 301 facing the front opening 101. The telescopic opening 302 may communicate with the telescopic cavity 301. An elastic member 32 and a retaining bead 31 may be separately mounted within the telescopic cavity 301. The elastic member 32 can drive the retaining bead 31 to protrude through the telescopic opening 302 and out of the sidewall surrounding the front opening 101 of the housing 1.

[0110] The mounting base 33 is provided with a telescopic cavity 301, which allows the elastic member 32 and the limiting bead 31 to move freely within a certain space. The telescopic cavity 301 is provided with a telescopic opening 302 on the side facing the front opening 101 of the box body 1. The setting of the telescopic opening 302 allows the limiting bead 31 to move along the telescopic cavity 301 under the drive of the elastic member 32, and protrude out of the peripheral side wall of the front opening 101 of the box body 1 through the telescopic opening 302, and cooperate with the limiting groove 201 on the door body 2. During the door opening process, by pulling the door body 2, the squeezing effect of the door body 2 on the limiting bead 31 can cause the limiting bead 31 to retract into the telescopic cavity 301 through the telescopic opening 302, thereby allowing the door body 2 to open.

[0111] In some embodiments, the elastic member 32 may be a spring, and correspondingly, the axial extension direction of the telescopic cavity 301 may be consistent with the axial direction of the spring.

[0112] Figure 11 for Figure 2 Schematic diagram of the door frame in ; Figure 12 for Figure 11 A partial enlarged view of point D.

[0113] like Figure 8 and Figure 12 As shown, in some embodiments, the mounting base 33 may be provided with a through-hole 303. The peripheral sidewall of the front opening 101 may be provided with a connecting hole 401 corresponding to the through-hole 303. In this way, a connecting member can pass through the through-hole 303 on the mounting base 33 and then connect to the connecting hole 401, thereby fixing the mounting base 33 to the peripheral sidewall of the front opening 101.

[0114] In some embodiments, the diameter of the telescopic opening 302 can be smaller than the diameter of the limiting bead 31. The diameter of the telescopic opening 302 can also be expressed as the size of the telescopic opening 302. By designing the diameter of the telescopic opening 302 to be smaller than the diameter of the limiting bead 31, the limiting bead 31 cannot completely escape from the telescopic cavity 301 directly through the telescopic opening 302 under normal conditions, thereby ensuring the stability and reliability of the door lock assembly 3.

[0115] like Figure 9As shown, in some embodiments, the shape of the telescopic opening 302 can be adapted to the shape of an outer diameter of the stop bead 31 along the axial direction. Specifically, the telescopic opening 302 can be configured as a circle so that the telescopic opening 302 can be adapted to the outer circumference of the stop bead 31. When the telescopic opening 302 is configured as a circle, the diameter of the telescopic opening 302, i.e., the diameter of the telescopic opening 302, is designed to be smaller than the diameter of the stop bead 31.

[0116] It should be noted that, in some other embodiments, the telescopic opening 302 may also be in a rectangular shape, and the shortest side length of the rectangular telescopic opening 302 is designed to be smaller than the diameter of the limiting bead 31 .

[0117] like Figure 9 As shown, in some embodiments, the diameter of the telescopic cavity 301 can gradually increase from the telescopic opening 302 toward the interior of the telescopic cavity 301. In this way, when the door body 2 closes and presses the limiting bead 31, the limiting bead 31 can smoothly retract into the telescopic cavity 301 along the gradually increasing diameter without encountering excessive resistance or damage.

[0118] Specifically, when the door body 2 begins to close, the side of the door body 2 away from the rotation axis contacts the limiting bead 31, thereby compressing the elastic member 32. The limiting bead 31 can extend into the interior of the telescopic cavity 301 through the telescopic opening 302. Since the spherical structure of the limiting bead 31 gradually increases from both ends to the middle, the diameter of the telescopic cavity 301 gradually increases. As the limiting bead 31 slides along the telescopic cavity 301, the increasing diameter ensures that the limiting bead 31 can smoothly extend into the interior of the telescopic cavity 301. When the door body 2 moves to the point where the limiting groove 201 is directly opposite the limiting bead 31, or when the door body 2 opens the front opening 101, the elastic member 32 can drive the limiting bead 31 toward the telescopic opening 302 and extend out of the peripheral side wall of the front opening 101. As the diameter of the telescopic cavity 301 gradually decreases, the limiting bead 31 can be restricted from moving to a position where it engages with the telescopic opening 302, preventing the limiting bead 31 from disengaging from the mounting seat 33 and affecting the normal function of the door lock assembly 3.

[0119] like Figure 8 and Figure 9 As shown, in some embodiments, the door lock assembly 3 can be provided with two limiting beads 31 and two elastic members 32, and a limiting bead 31 and an elastic member 32 are provided in conjunction with each other, thereby improving the stability and reliability of the locking between the door lock assembly 3 and the door body 2.

[0120] like Figure 9As shown, in some embodiments, the mounting base 33 may include two telescopic cavities 301. The door lock assembly 3 may include two stopper beads 31 and two elastic members 32, with one stopper bead 31 and one elastic member 32 disposed within the telescopic cavities 301. The door body 2 may be provided with two stopper grooves 201. When the door body 2 is closed, the stopper grooves 201 correspond to the stopper beads 31, and the stopper grooves 201 are arranged at intervals along the height direction of the door body 2.

[0121] Specifically, the mounting base 33 is provided with two independent telescopic cavities 301, each of which is used to accommodate and support a limiting bead 31 and an elastic member 32. The door lock assembly 3 includes two limiting beads 31 and two elastic members 32, and each telescopic cavity 301 is correspondingly provided with a limiting bead 31 and an elastic member 32. Correspondingly, the door body 2 is provided with two independent limiting grooves 201, so that the two limiting beads 31 can be respectively engaged in the limiting grooves 201. Because the mounting base 33 is provided with two telescopic cavities 301 and two limiting beads 31, and the door body 2 is provided with two limiting grooves 201, the door lock assembly 3 has greater stability and reliability when locking the door body 2.

[0122] Furthermore, the limiting grooves 201 are arranged at intervals along the height direction of the door body 2, and correspondingly, the limiting beads 31 are also arranged at intervals along the height direction of the door body 2, so that the door body 2 can be more evenly stressed when closed, reducing deformation or damage caused by uneven stress.

[0123] In some embodiments, the door lock assembly 3 may be provided with multiple limiting beads 31 and multiple elastic members 32, the mounting base 33 may also be provided with multiple limiting cavities 304, and the door body 2 may also be provided with a corresponding number of limiting grooves 201. This can further improve the smoothness during the door closing process and the stability after the door body 2 is locked.

[0124] like Figure 2 As shown, in some embodiments, a plurality of door lock assemblies 3 may be provided. The mounting seats 33 of the plurality of door lock assemblies 3 may be spaced apart and arranged on the peripheral side wall of the front opening 101 along the height direction of the door body 2 .

[0125] like Figure 9 and Figure 10 As shown, in some embodiments, the door lock assembly 3 may include an adjusting member 34. The adjusting member 34 can adjust the expansion and contraction space of the elastic member 32, thereby adjusting the preload force of the door lock assembly 3.

[0126] like Figure 9As shown, in some embodiments, the mounting base 33 may be provided with a limiting cavity 304. The limiting cavity 304 may be in communication with the telescopic cavity 301. An adjusting member 34 may be movably disposed within the limiting cavity 304. An end of the elastic member 32 distal from the limiting bead 31 may abut against the adjusting member 34. The adjusting member 34 may be movable along the depth direction of the limiting cavity 304 to adjust the distance between the adjusting member 34 and the limiting bead 31.

[0127] Among them, by setting a limiting cavity 304 on the mounting seat 33, a movable space is provided for the adjusting member 34, so that the adjusting member 34 can move in the limiting cavity 304, thereby adjusting the preload force of the door lock assembly 3.

[0128] The limiting cavity 304 is located on one end of the telescopic cavity 301 away from the telescopic opening 302 . One end of the elastic member 32 abuts against the limiting bead 31 , and the other end of the elastic member 32 can extend into the limiting cavity 304 and abut against the adjusting member 34 .

[0129] Furthermore, by movably connecting the adjusting member 34 in the limiting cavity 304, the adjusting member 34 can move freely in the depth direction of the limiting cavity 304, thereby adjusting the distance between the adjusting member 34 and the limiting bead 31, that is, when the adjusting member 34 moves in the limiting cavity 304, the telescopic range between the axial ends of the elastic member 32 can be changed.

[0130] Specifically, when the adjusting member 34 approaches the retaining bead 31, the pushing force exerted by the elastic member 32 on the retaining bead 31 increases, thereby strengthening the locking force of the door lock. Conversely, when the adjusting member 34 moves away from the retaining bead 31, the pushing force exerted by the elastic member 32 on the retaining bead 31 decreases, thereby weakening the locking force of the door lock. In this way, the locking force of the door lock assembly 3 can be adjusted by the adjusting member 34, allowing the user to more flexibly control the locking and unlocking process of the door lock according to the usage of the door body 2.

[0131] In some embodiments, the adjusting member 34 may be an adjusting bolt.

[0132] In some embodiments, the sidewalls of the limiting cavity 304 may be provided with internal threads (not shown). The internal threads may extend along the depth of the limiting cavity 304; the outer wall of the adjusting member 34 may be provided with external threads (not shown). The adjusting member 34 may be threadedly connected to the sidewalls of the limiting cavity 304. The adjusting member 34 can rotate forward or backward to move toward or away from the limiting bead 31 along the depth of the limiting cavity 304.

[0133] Among them, by providing an internal thread on the peripheral side wall of the limiting cavity 304, an external thread that is compatible with the peripheral side wall of the limiting cavity 304 is provided on the outer peripheral wall of the adjusting member 34. Since the threaded connection has a self-locking function, when the adjusting member 34 is rotated to the desired position, the adjusting member 34 will be firmly locked in the limiting cavity 304 and will not be easily moved due to external forces, thereby making the door lock assembly 3 reliable and durable during long-term use.

[0134] like Figure 6 Specifically, when the adjusting member 34 is rotated forward or backward, it can move along the depth direction of the limiting cavity 304 toward or away from the limiting bead 31, allowing the operator to adjust the distance between the adjusting member 34 and the limiting bead 31 by simply rotating the adjusting member 34. In this way, before installing the door lock assembly 3 on the door frame 4, the locking force of the door lock can be precisely adjusted by rotating the adjusting member 34 forward or backward, that is, clockwise or counterclockwise.

[0135] When the adjusting member 34 approaches the retaining bead 31, the elastic member 32 is compressed more tightly, increasing the thrust on the retaining bead 31 and strengthening the locking force of the door lock. Conversely, when the adjusting member 34 moves away from the retaining bead 31, the thrust on the retaining bead 31 by the elastic member 32 decreases, weakening the locking force of the door lock. The arrangement of the adjusting member 34 allows the user to adjust the position of the adjusting member 34 with a simple rotation, making the adjustment process of the door lock assembly 3 simpler, faster, and more convenient.

[0136] like Figure 9 and Figure 10 As shown, in some embodiments, a limiting column 35 may be provided on one end of the adjusting member 34 close to the elastic member 32. The elastic member 32 may be sleeved on the limiting column 35 and abut against the end surface of the adjusting member 34 facing the elastic member 32.

[0137] Among them, the adjusting member 34 can have two axial ends, one end of the adjusting member 34 is arranged near the peripheral side wall of the front opening 101, and the other end of the adjusting member 34 is arranged near the elastic member 32. The adjusting member 34 is provided with a limiting column 35 at the end arranged near the elastic member 32. The part of the elastic member 32 extending into the limiting cavity 304 can be sleeved on the limiting column 35 and abut against the end face of the adjusting member 34 facing the elastic member 32. In this way, the limiting column 35 can enable the elastic member 32 to remain stable when subjected to external force, and the elastic member 32 can maintain the stability of its shape and position during the extension and contraction process, thereby improving the overall stability and reliability of the door lock assembly 3.

[0138] like Figure 4 and Figure 11 As shown, in some embodiments, the box body 1 may be provided with a door frame 4. The door lock assembly 3 may be provided on the door frame 4.

[0139] like Figure 11 As shown, in some embodiments, the door frame 4 may include a first frame edge 41 and a second frame edge 42 disposed vertically opposite to each other. The door body 2 may be rotatably connected to the first frame edge 41. The door lock assembly 3 may be disposed on the second frame edge 42.

[0140] The first frame edge 41 and the second frame edge 42 may refer to the left and right side frames of the door frame 4. The door body 2 is rotatably connected to the first frame edge 41, so that the door body 2 can be rotated around the first frame edge 41 to open or close. A limiting groove 201 is provided on the side wall of the door body 2 away from the first frame edge 41. The limiting groove 201 is provided in cooperation with the door lock assembly 3 on the second frame edge 42.

[0141] like Figure 12 As shown, in some embodiments, the second frame edge 42 may include a first side wall 421, a second side wall 422, and a connecting wall 423. The first side wall 421 may form the rear end of the peripheral side wall of the front opening 101. The second side wall 422 may form the front end of the peripheral side wall of the front opening 101. The second side wall 422 may be located on a side of the first side wall 421 away from the front opening 101. The connecting wall 423 may be connected between the first side wall 421 and the second side wall 422. The connecting wall 423 and the second side wall 422 facing the side of the front opening 101 may enclose and form an installation space 402. The mounting seat 33 may be installed in the installation space 402.

[0142] Specifically, the first side wall 421 forms the rear end of the side wall of the front side opening 101, and the second side wall 422 forms the front end of the side wall of the front side opening 101. The first side wall 421 is located on the side of the second side wall 422 close to the opening, which is equivalent to the first side wall 421 being arranged on the inner side of the second side wall 422, and the laterally arranged connecting wall 423 is connected to the first side wall 421 and the second side wall 422. In this way, the first side wall 421, the connecting wall 423 and the second side wall 422 form a step structure, so that the first side wall 421, the connecting wall 423 and the second side wall 422 enclose to form an installation space 402 for accommodating the door lock assembly 3. When the door body 2 is closed on the front opening 101, the door body 2 cooperates with the front end of the peripheral side wall of the front opening 101 to form a locking structure, and the inner side of the door body 2 can be tightly attached to the first side wall 421, thereby preventing the cold air in the refrigeration room from leaking through the cooperation structure between the door body 2 and the door lock, thereby further improving the refrigeration and heat preservation effects in the refrigeration room.

[0143] like Figure 11 As shown, in some embodiments, the connection hole 401 can be provided on the second side wall 422. The through hole 303 provided on the mounting seat 33 can be connected to the connection hole 401 through a connector, and then fixed to the second side wall 422.

[0144] In some embodiments, a seal (not shown) may be provided on the inner side of the door body 2. When the door body 2 closes the front opening 101, the seal may abut between the inner side of the door body 2 and the first side wall 421, thereby achieving a good sealing effect and effectively improving the heat preservation effect of the refrigeration compartment.

[0145] In some other embodiments, the second frame edge 42 of the door frame 4 can be set to a plane, the door lock assembly 3 is embedded and installed in the second frame edge 42, and the limiting bead 31 can extend out of the outside of the second frame edge 42 under the action of the elastic member 32.

[0146] like Figure 1 、 Figure 2 and Figure 11 As shown, the installation space 402 can be located on one side of the front opening 101. The installation space 402 can be exposed outside the refrigeration compartment. When the outer door 11 is closed on the outer side of the door body 2, the installation space 402 can be further covered, thereby improving the heat preservation performance of the refrigeration device and preventing the leakage of cold air inside the refrigeration compartment.

[0147] The above are merely specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. A refrigeration device, characterized in that: include: A box body, which forms the outer shell of the refrigeration device, and a refrigeration compartment with a front opening is provided inside the box body; A door body, one side of which is rotatably connected to the box body via a rotating shaft so as to cover the front opening; A limiting groove is provided on one side of the door body away from the rotating shaft; A door lock assembly is provided on the peripheral side wall of the front opening of the box body, and the door lock assembly includes: A limiting bead is movably arranged on the peripheral side wall of the front opening of the box body; an elastic member, abutting against the limiting bead to drive the limiting bead to protrude on the peripheral side wall of the front opening of the box body; Wherein, during the closing process of the door body, the side of the door body away from the rotating shaft can abut against the limiting bead, so that the limiting bead compresses the elastic member; When the door body is closed, the limiting groove and the limiting bead are arranged opposite to each other, and the elastic member can drive the limiting bead to move toward the limiting groove, so that the limiting bead is engaged in the limiting groove.

2. The refrigeration device according to claim 1, characterized in that The side wall of the door body is recessed with a slide groove, the slide groove and the limiting groove are located on the same side wall of the door body, and the slide groove extends along the front-to-back direction of the door body; the front end of the slide groove is connected to the limiting groove, and the rear end of the slide groove extends to the inner side of the door body; During the closing process of the door body, the limiting bead can slide along the sliding groove into the limiting groove.

3. The refrigeration device according to claim 2, characterized in that The depth of the chute gradually decreases in a direction from the rear end of the chute to the front end of the chute.

4. The refrigeration device according to claim 1, wherein: The side wall of the door body is provided with an inclined surface, and the inclined surface and the limiting groove are located on the same side wall of the door body. One side of the inclined surface is connected to the limiting groove, and the other side of the inclined surface extends to the inner side of the door body. In the direction along the limiting groove toward the inner side of the door body, the inclined surface is inclined toward the direction close to the center of the door body.

5. The refrigeration device according to claim 1, wherein: The door lock assembly includes a mounting base, which is arranged on the peripheral side wall of the front opening of the box body, and a telescopic cavity is provided in the mounting base. A telescopic opening is provided on a side of the telescopic cavity facing the front opening, and the telescopic opening is communicated with the telescopic cavity; The elastic member and the limiting bead are respectively installed in the telescopic cavity. The elastic member can drive the limiting bead to protrude out of the telescopic opening and out of the peripheral side wall of the front opening of the box body.

6. The refrigeration device according to claim 5, characterized in that The diameter of the telescopic opening is smaller than the diameter of the limiting bead; The diameter of the telescopic cavity gradually increases from the telescopic opening toward the interior of the telescopic cavity.

7. The refrigeration device according to claim 5, characterized in that The box body is provided with a door frame, and the door lock assembly is arranged on the door frame; the door frame includes a first frame side and a second frame side arranged vertically opposite to each other, the door body is rotatably connected to the first frame side, and the door lock assembly is arranged on the second frame side; The second frame edge includes a first side wall, a second side wall and a connecting wall; The first side wall forms the rear end of the peripheral side wall of the front opening; The second side wall forms the front end of the peripheral side wall of the front opening, and the second side wall is located on a side of the first side wall away from the front opening; The connecting wall is connected between the first side wall and the second side wall, and the connecting wall and the second side wall facing the front opening enclose a mounting space; The mounting seat is installed in the mounting space.

8. The refrigeration device according to claim 5, characterized in that The door lock assembly further includes an adjusting member, the mounting seat is provided with a limiting cavity, the limiting cavity is communicated with the telescopic cavity, the adjusting member is movably disposed in the limiting cavity, and an end of the elastic member away from the limiting bead abuts against the adjusting member; The adjusting member can move along the depth direction of the limiting cavity to adjust the distance between the adjusting member and the limiting bead.

9. The refrigeration device according to claim 8, characterized in that An internal thread is provided on the peripheral side wall of the limiting cavity, and the internal thread extends along the depth direction of the limiting cavity; An external thread is provided on the outer peripheral wall of the adjusting member, and the adjusting member is threadedly connected to the peripheral side wall of the limiting cavity; The adjusting member can rotate forward or reversely, so that the adjusting member moves along the depth direction of the limiting cavity toward or away from the limiting bead.

10. The refrigeration device according to claim 1, wherein: The box further comprises an outer door, which is arranged on the outer side of the door body. One side of the outer door is rotatably connected to the box body to cover the outer side of the door body.

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