Refrigeration equipment

Abstract

The refrigeration equipment comprises an inner container and a fresh-keeping module, a refrigeration chamber with an opening is defined by the inner container, the inner container comprises a pair of side walls which are located on the two sides of the opening and oppositely arranged, each side wall is provided with a plurality of positioning protrusions, and a positioning recess is formed between every two adjacent positioning protrusions; a fresh-keeping chamber is defined in the fresh-keeping module, the fresh-keeping module comprises side faces facing the two side walls respectively, and a plurality of abutting protrusions are arranged on the side faces; and in the process that the fresh-keeping module is inserted into the refrigeration chamber from the opening, the abutting protrusions abut against the upper surfaces of the positioning protrusions and slide along the upper surfaces until the abutting protrusions fall into the positioning recesses. The fresh-keeping module can be automatically positioned in a sliding manner when being inserted into the inner container, so that the problem of position deviation or instability in the mounting process is avoided, and accurate butt joint of the fresh-keeping module and other modules is ensured; moreover, the installation process is simplified, the installation efficiency and accuracy are improved, the production is facilitated, and the durability of the equipment and the user experience are also improved.

Description

Technical Field

[0001] This utility model relates to the field of cold storage and preservation technology, and in particular to a refrigeration device. Background Technology

[0002] Current refrigeration equipment requires that the preservation module used to preserve food be reliably positioned within the refrigeration room in order to ensure its accurate installation with other modules such as refrigeration gas, oxygen-regulating gas, and humidity control. Therefore, avoiding positional shifts or instability during installation is a key issue that needs to be addressed. Furthermore, the installation and positioning method must facilitate subsequent disassembly and maintenance; otherwise, it will affect the equipment's performance and the user experience. Utility Model Content

[0003] To address the installation and positioning issues of preservation modules in existing technologies, the purpose of this utility model is to provide a refrigeration device that allows for reliable installation and accurate positioning of preservation modules.

[0004] To achieve the above-mentioned objectives, one embodiment of this utility model provides a refrigeration device, comprising:

[0005] The inner liner surrounds a refrigeration chamber with an opening. The inner liner includes a pair of opposite sidewalls located on both sides of the opening. Each sidewall is provided with a plurality of positioning protrusions, and positioning recesses are formed between adjacent positioning protrusions.

[0006] A preservation module, which encloses a preservation chamber inside, the preservation module includes sides facing the two side walls respectively, and the sides are provided with a plurality of abutment protrusions;

[0007] As the preservation module is inserted into the refrigeration compartment through the opening, the abutting protrusion slides along the upper surface of the positioning protrusion until the abutting protrusion falls into the positioning recess.

[0008] As a further improvement of this utility model, along the sliding direction of the abutting protrusion, the length of the upper surface of the positioning protrusion is greater than the distance between adjacent abutting protrusions.

[0009] As a further improvement of this utility model, a first guide portion is provided at the lower end of the abutting protrusion, and / or a second guide portion is provided at the upper end of the positioning protrusion near the positioning recess, the first guide portion and / or the second guide portion being used to guide the abutting protrusion into the positioning recess.

[0010] As a further improvement of this utility model, at least one of the positioning protrusions is provided with a first limiting part, and the side is provided with a second limiting part. After the abutting protrusion falls into the positioning recess, the first limiting part restricts the movement of the second limiting part.

[0011] As a further improvement of this utility model, the first limiting part is configured as a limiting groove, and the second limiting part is configured as an elastic limiting protrusion;

[0012] When the abutting protrusion does not fall into the positioning recess and abuts against the positioning protrusion, the elastic limiting protrusion is pressed into the interior of the side surface;

[0013] After the abutting protrusion falls into the positioning recess, the elastic limiting protrusion recovers its elastic deformation and falls into the limiting groove.

[0014] As a further improvement of this utility model, the bottom of the preservation module is provided with a ventilation hole that connects to the preservation chamber, and an oxygen regulation module is provided below the preservation module, the oxygen regulation module including an upward-opening ventilation port.

[0015] The abutting protrusion slides along the upper surface of the positioning protrusion until the abutting protrusion is aligned with the positioning recess, at which point the vent is aligned with the vent hole.

[0016] During the process of the abutting protrusion falling into the positioning recess, the vent is aligned with the vent hole.

[0017] As a further improvement of this utility model, the vent hole is conical, and the cross-section of the vent hole gradually decreases in the direction close to the oxygen regulating module;

[0018] During the process of the abutting protrusion falling into the positioning recess, the vent moves downward and the vent is inserted into the vent.

[0019] As a further improvement of this utility model, the length of the abutting protrusion is greater than the length of the vent hole in the vertical direction.

[0020] As a further improvement of this utility model, the side is also provided with a supporting edge connected to the upper end of the abutting protrusion. During the process of the preservation module being inserted into the refrigeration chamber from the opening, the abutting protrusion falls into the positioning recess until the upper surface of the positioning protrusion abuts against the supporting edge.

[0021] As a further improvement of this utility model, the positioning protrusions on both sides are symmetrically arranged, and at least two positioning recesses are formed on each side wall, and the number of abutting protrusions corresponds to the number of positioning recesses.

[0022] Compared with the prior art, this utility model has the following beneficial effects: The refrigeration equipment has several positioning protrusions and positioning recesses on both sides of the inner liner, and the side of the preservation module is provided with abutment protrusions. When the preservation module is inserted into the inner liner, it can automatically slide and be positioned. The cooperation between the abutment protrusions and the positioning recesses ensures that the preservation module can be accurately positioned in the refrigeration chamber, avoiding the problem of positional deviation or instability during installation. It solves the problem of reliable positioning of the preservation module in the refrigeration chamber and ensures accurate docking of the preservation module with other modules. It also simplifies the installation process, improves installation efficiency and accuracy, facilitates production, and improves the durability of the equipment and user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a refrigeration device according to an embodiment of the present invention;

[0024] Figure 2 This is a partial structural schematic diagram of a cooling device according to an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 Exploded view of the middle structure;

[0026] Figure 4 This is a cross-sectional view of the inner liner of an embodiment of the present invention;

[0027] Figure 5 yes Figure 4 A magnified view of point A in the image;

[0028] Figure 6 This is an exploded view of a preservation module and an oxygen regulation module according to an embodiment of this utility model;

[0029] Figure 7 Yes, yes Figure 6 A magnified view of point B in the image;

[0030] Figure 8 This is a side view of a preservation module and an oxygen-regulating module according to an embodiment of the present invention;

[0031] Figure 9 This is a partial cross-sectional view of a preservation module and an oxygen regulation module according to an embodiment of the present invention;

[0032] Among them, 100 is the refrigeration equipment; 10 is the inner liner; 101 is the side wall; 110 is the refrigeration compartment; 11 is the positioning protrusion; 111 is the upper surface; 112 is the second guide part; 12 is the positioning recess; 13 is the first limiting part; 20 is the preservation module; 210 is the preservation compartment; 201 is the side; 21 is the abutting protrusion; 211 is the first guide part; 22 is the second limiting part; 23 is the abutting edge; 24 is the vent; 25 is the drawer; 30 is the oxygen adjustment module; and 31 is the vent. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0034] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative position” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0035] One embodiment of this utility model provides a refrigeration device 100 with reliable installation and accurate positioning of the preservation module 20. The installation process is simple, and the positioning of the preservation module 20 in the refrigeration chamber 110 is reliable, ensuring accurate docking of the preservation module 20 with other modules.

[0036] The refrigeration device 100 in this embodiment can be a refrigerator, freezer, wine cabinet, or refrigerated display case. The following description uses a refrigerator as an example. The overall structure of the refrigerator is as follows: Figure 1 As shown.

[0037] The refrigerator includes a refrigeration system, a refrigeration compartment 110, an inner liner 10, a preservation module 20, a cooling supply component, and an oxygen regulation module 30. The refrigeration system includes a compressor, condenser, capillary tube, evaporator, and refrigeration piping. The refrigeration compartment 110 can be a refrigerator compartment, a freezer compartment, a variable temperature compartment, etc. The following description of the refrigeration compartment 110 will use a refrigerator compartment as an example.

[0038] The inner liner 10 encloses a refrigeration chamber 110 with an opening. The inner liner 10 includes a pair of opposing side walls 101 located on both sides of the opening. The preservation module 20 is inserted into the refrigeration chamber 110 through the opening.

[0039] The preservation module 20 is a module specifically designed for preserving fresh ingredients. It contains a preservation compartment 210, and a drawer 25 can be pulled out or moved into the preservation compartment 210. The temperature, humidity, and oxygen concentration inside the preservation module 20 are adjustable. The oxygen regulation module 30 is used to adjust the oxygen concentration in the preservation compartment 210, ensuring that the oxygen concentration is lower or higher than the external oxygen concentration. Based on the characteristics of the stored ingredients, different oxygen concentrations are adjusted to maintain the ingredients in their optimal storage condition.

[0040] To clearly express the positions and directions described in this embodiment, in this embodiment, the direction of gravity is defined as up and down, that is, the direction of gravity is down and the opposite direction is up. When the user operates the items inside the refrigerator, the user is standing in front of the refrigerator, and the opposite direction is behind. The two sides of the plane containing the front, back, up, and down are the left and right sides, respectively. Correspondingly, the opening is located in front of the refrigeration compartment 110, and the drawer 25 is pushed and pulled in the front-back direction. The preservation module 20 moves into the refrigeration compartment 110 from front to back.

[0041] like Figures 3-5 As shown, each sidewall 101 is provided with several positioning protrusions 11, and positioning recesses 12 are formed between adjacent positioning protrusions 11; as Figures 6-8 As shown, the preservation module 20 includes side surfaces 201 facing the two side walls 101 respectively, and the side surfaces 201 are provided with a plurality of abutment protrusions 21; during the process of the preservation module 20 being inserted into the refrigeration chamber 110 from the opening, the abutment protrusions 21 abut against the upper surface 111 of the positioning protrusion 11 and slide along the upper surface 111 until the abutment protrusion 21 falls into the positioning recess 12.

[0042] The positioning protrusions 11 and recesses on both sides of the inner liner 10 allow the preservation module 20 to be securely and automatically positioned and inserted into the refrigeration compartment 110. This structural design, through the sliding engagement between the abutment protrusion 21 and the surface of the positioning protrusion 11, achieves self-guided installation during insertion, significantly reducing the difficulty of manual alignment. Simultaneously, the alignment of the positioning recess 12 with the abutment protrusion 21 ensures the preservation module 20 is securely positioned in its final state, improving installation efficiency and enhancing the module's stability during operation, preventing sealing problems caused by shaking or displacement. Furthermore, this design avoids complex additional positioning structures, simplifying the manufacturing and assembly process and reducing costs.

[0043] Furthermore, along the sliding direction of the abutment protrusion 21, the length l1 of the upper surface 111 of the positioning protrusion 11 is greater than the distance l2 between adjacent abutment protrusions 21, and the length l1 of the upper surface 111 is as follows: Figure 5 As shown, the distance l2 between the abutting protrusions 21 is as follows Figure 8 As shown, by increasing the length of the upper surface 111 of the positioning protrusion 11, sufficient contact area is ensured for guiding the preservation module 20 during sliding insertion, preventing friction and jamming during insertion. Conversely, if L1≤L2, jamming may occur. Therefore, this dimensional limitation optimizes the smoothness of installation, ensures stable module docking, and prevents installation failure or module damage due to misalignment.

[0044] like Figure 5 , 7As shown, a first guide portion 211 is provided at the lower end of the abutment protrusion 21, and / or a second guide portion 112 is provided on the upper end of the positioning protrusion 11 near the positioning recess 12. The first guide portion 211 and / or the second guide portion 112 are used to guide the abutment protrusion 21 into the positioning recess 12. When the preservation module 20 approaches its final position, the first guide portion 211 and the second guide portion 112 guide the abutment protrusion 21 to accurately fall into the positioning recess 12. The first guide portion 211 and / or the second guide portion 112 can be set to be chamfered or rounded to realize the automatic guidance function, making installation more convenient and ensuring accurate positioning.

[0045] Continue as Figure 5 , 7 As shown, at least one of the positioning protrusions 11 is provided with a first limiting part 13, and the side 201 is provided with a second limiting part 22. After the abutment protrusion 21 falls into the positioning recess 12, the first limiting part 13 restricts the movement of the second limiting part 22. These limiting structures further enhance the stability of the preservation module 20 after positioning, prevent the module from moving axially or laterally after insertion, improve the fixing effect of the module, and avoid loosening problems caused by vibration or other external forces during long-term use, thus extending the service life of the equipment.

[0046] Furthermore, the first limiting part 13 is configured as a limiting groove, and the second limiting part 22 is configured as an elastic limiting protrusion; when the abutting protrusion 21 does not fall into the positioning recess 12 and abuts against the positioning protrusion 11, the elastic limiting protrusion is pressed into the side 201; after the abutting protrusion 21 falls into the positioning recess 12, the elastic limiting protrusion restores its elastic deformation and falls into the limiting groove.

[0047] By designing the limiting protrusion as an elastically deformable structure, the elastic limiting protrusion can make way for the positioning protrusion 11 during installation, without affecting the movement of the preservation module 20. After the elastic limiting protrusion moves to the position of the positioning recess 12, it can automatically adapt and press into place. When the abutment protrusion 21 falls completely into the positioning recess 12, the elastic limiting protrusion returns to its original deformation, thereby achieving precise positioning and limiting. This elastic structure not only improves fault tolerance but also makes the installation operation more flexible, allowing for different manufacturing errors to be accommodated within a larger range.

[0048] In addition, the structures of the limiting grooves and elastic limiting protrusions corresponding to the first limiting part 13 and the second limiting part 22 can also be interchanged to achieve the same purpose.

[0049] Furthermore, such as Figure 9As shown, the bottom of the preservation module 20 is provided with a ventilation hole 24 that connects to the preservation compartment 210. Below the preservation module 20, an oxygen regulation module 30 is provided, which includes an upward-opening ventilation port 31. When the abutting protrusion 21 abuts against the upper surface 111 of the positioning protrusion 11 and slides along the upper surface 111 until the abutting protrusion 21 is aligned with the positioning recess 12, the ventilation port 31 is aligned with the ventilation hole 24. During the process of the abutting protrusion 21 falling into the positioning recess 12, the ventilation port 31 and the ventilation hole 24 are connected.

[0050] Oxygen regulation module 30 Figure 2 , 3 As shown in Figures 6, 8, and 9, the oxygen concentration in the preservation compartment 210 can be adjusted to be lower or higher than the external oxygen concentration. Based on the characteristics of the stored food, different oxygen concentrations are adjusted to ensure the food is in its optimal storage condition.

[0051] As the abutment protrusion 21 slides into the positioning recess 12, the vent 24 and vent 31 gradually align and eventually achieve a tight connection. This design ensures that the oxygen flow path will not leak due to poor alignment, improving the accuracy of the oxygen regulation function. In addition, the automatic alignment design of the vent 24 simplifies the alignment process during installation, ensuring effective communication between the freshness compartment 210 and the oxygen regulation module 30, and guaranteeing the reliability of the freshness preservation effect.

[0052] Taking the oxygen-regulating module 30 for adjusting a low-oxygen environment as an example, through precise oxygen concentration control, a stable low-oxygen environment can be provided for the food stored in the fresh-keeping compartment 210, inhibiting its respiration and extending its shelf life. The benefits of a low-oxygen environment are that it significantly reduces the oxidation rate of food and decreases the reproduction of microorganisms, especially for perishable fruits and vegetables, where the preservation effect is particularly significant. Because this solution can precisely control the oxygen concentration, it avoids the problem of unstable food quality caused by excessive fluctuations in oxygen concentration in traditional equipment, thus ensuring a long-term preservation effect. The oxygen concentration in the outside atmosphere is generally around 21%, while the oxygen concentration in the fresh-keeping compartment 210 can be reduced to the range of 15% to 20%.

[0053] In addition, the oxygen control module 30 includes at least one anode and at least one cathode, with the anode being controllably connected to the positive terminal of the power supply and the cathode being controllably connected to the negative terminal of the power supply.

[0054] Thus, when the controller controls the oxygen regulating module 30 to run, under the control of the controller, the positive terminal of the power supply is connected to the anode and the negative terminal of the power supply is connected to the cathode, that is, the power supply supplies power to the oxygen regulating module 30; and when the controller controls the oxygen regulating module 30 to stop, under the control of the controller, the positive terminal of the power supply is connected to the anode and the negative terminal of the power supply is connected to the cathode, that is, the power supply stops supplying power to the oxygen regulating module 30.

[0055] The oxygen control module 30 also includes an inner cavity that can at least contain an electrolyte, with a first side of the cathode exposed in the inner cavity and a second side exposed to the external air of the oxygen control module 30.

[0056] When the oxygen regulating module 30 is running, i.e., when it is energized, the cathode is used to consume oxygen from the external air through an electrochemical reaction. Specifically, oxygen undergoes a reduction reaction at the cathode, with the reaction formula being O2 + 2H2O + 4e. - →4OH - In this way, an oxygen-deficient preservation atmosphere can be formed outside the oxygen-regulating module 30.

[0057] One or both sides of the anode are exposed in the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to create an oxygen-rich preservation atmosphere. Specifically, OH- in the electrolyte... - An oxidation reaction can occur at the anode to produce oxygen, with the reaction formula being 4OH⁻. - →O2 + 2H2O + 4e - The generated oxygen is collected to create an oxygen-rich preservation atmosphere.

[0058] This allows you to adjust the oxygen concentration as needed and choose a suitable oxygen-deficient or oxygen-enriched preservation atmosphere.

[0059] Furthermore, such as Figure 9 As shown, the vent 24 is conical, and its cross-section gradually decreases in the direction close to the oxygen regulating module 30. As the abutment protrusion 21 falls into the positioning recess 12, the vent 24 moves downward, and the vent 31 is inserted into the vent 24.

[0060] The conical structure ensures a stable insertion structure, making the connection between the vent 31 and the vent hole 24 more tight, improving sealing performance, reducing the risk of gas leakage at the interface, and thus improving the overall oxygen regulation efficiency of the equipment.

[0061] The oxygen-regulating module 30 can be installed in the refrigeration compartment 110 first. Then, as the preservation module 20 is inserted downwards, the vent 24 moves downwards, and the vent 31 gradually extends into the vent 24, forming a tight seal to prevent gas leakage. This conical structure not only improves the efficiency of airflow conduction but also enhances the sealing effect. Especially in high and low pressure airflow environments, this design can effectively prevent reverse airflow leakage. In this way, the preservation module 20 achieves a sealed connection with the oxygen-regulating module 30 during downward installation.

[0062] In addition, a sealing element can be provided on one of the vent 31 and the vent hole 24, with the shape matching the vent 31 and the vent hole 24 respectively, to improve the sealing performance of the system.

[0063] Furthermore, along the vertical direction, the length of the abutment protrusion 21 is greater than the length of the vent hole 24. This ensures the smooth backward movement of the preservation module 20, preventing it from getting stuck with the vent hole 24 below during backward sliding. In other words, by adjusting the length of the abutment protrusion 21, it is ensured that it provides sufficient support during installation without affecting the connection between the vent 31 and the vent hole 24, thus ensuring the stability and airtightness of the ventilation channel and preventing gas leakage or mixing at unexpected locations due to improper movement or misalignment.

[0064] The following describes the movement of the abutment protrusion 21 into position during its downward movement in two different ways.

[0065] In one embodiment, such as Figure 7 As shown, the side 201 is also provided with a supporting edge 23 connected to the upper end of the abutment protrusion 21. During the process of the preservation module 20 being inserted into the refrigeration chamber 110 from the opening, the abutment protrusion 21 falls into the positioning recess 12 until the upper surface 111 of the positioning protrusion 11 abuts against the supporting edge 23. After the supporting edge 23 contacts the upper surface 111 of the positioning protrusion 11, a support structure is formed to ensure the stable support of the preservation module 20. This structural design not only improves the overall stability of the module, but also reduces the possibility of loosening or damage during repeated insertion and removal operations, thus enhancing the durability of the equipment.

[0066] In another embodiment, such as Figure 9 As shown, during the downward movement of the abutment protrusion 21, until the vent 31 is fully inserted into the vent hole 24 and can no longer move, the preservation module 20 moves to its lowest position. This embodiment ensures the sealing of the vent 31 and the vent hole 24.

[0067] Furthermore, the positioning protrusions 11 on both sides are symmetrically arranged, and at least two positioning recesses 12 are formed on each sidewall 101. The number of abutting protrusions 21 corresponds to the number of positioning recesses 12. In this embodiment, two positioning recesses 12 are provided on each of the left and right sidewalls 101, and two abutting protrusions 21 are provided on each of the left and right sidewalls 201, such as... Figure 5 and 7 As shown.

[0068] The symmetrical placement of the positioning protrusions 11 ensures that the preservation module 20 is evenly stressed during insertion. The design of at least two positioning recesses 12 on each sidewall 101 ensures the module's stability; even in large equipment, each positioning point of the module receives effective support from at least four surfaces. This symmetrical structure reduces misalignment during installation, ensuring precise module insertion while enhancing the overall stability and durability of the equipment.

[0069] Compared with commonly used technologies, this embodiment has the following advantages:

[0070] The refrigeration equipment 100 has several positioning protrusions 11 and positioning recesses 12 on the two side walls 101 of the inner liner 10. The side 201 of the preservation module 20 has abutment protrusions 21. When the preservation module 20 is inserted into the inner liner 10, it can automatically slide and be positioned. The cooperation between the abutment protrusions 21 and the positioning recesses 12 ensures that the preservation module 20 can be accurately positioned in the refrigeration chamber 110, avoiding the problem of positional deviation or instability during installation. It solves the problem of reliable positioning of the preservation module 20 in the refrigeration chamber 110, and ensures accurate docking of the preservation module 20 with other modules. It also simplifies the installation process, improves installation efficiency and accuracy, facilitates production, and improves the durability of the equipment and user experience.

[0071] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0072] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A refrigeration device, characterized in that, include: The inner liner (10) surrounds a refrigeration chamber (110) with an opening. The inner liner (10) includes a pair of opposite sidewalls (101) located on both sides of the opening. Each sidewall (101) is provided with a plurality of positioning protrusions (11), and positioning recesses (12) are formed between adjacent positioning protrusions (11). A preservation module (20) is provided, which encloses a preservation chamber (210). The preservation module (20) includes two sides (201) facing the two side walls (101) respectively. The side (201) is provided with a plurality of abutment protrusions (21). During the process of inserting the preservation module (20) into the refrigeration chamber (110) from the opening, the abutting protrusion (21) abuts against the upper surface (111) of the positioning protrusion (11) and slides along the upper surface (111) until the abutting protrusion (21) falls into the positioning recess (12).

2. The refrigeration equipment according to claim 1, characterized in that, Along the sliding direction of the abutment protrusion (21), the length of the upper surface (111) of the positioning protrusion (11) is greater than the distance between adjacent abutment protrusions (21).

3. The refrigeration equipment according to claim 1, characterized in that, A first guide portion (211) is provided at the lower end of the abutting protrusion (21), and / or a second guide portion (112) is provided at the upper end of the positioning protrusion (11) near the positioning recess (12), the first guide portion (211) and / or the second guide portion (112) are used to guide the abutting protrusion (21) to fall into the positioning recess (12).

4. The refrigeration equipment according to claim 1, characterized in that, At least one of the positioning protrusions (11) is provided with a first limiting part (13), and the side (201) is provided with a second limiting part (22). After the abutting protrusion (21) falls into the positioning recess (12), the first limiting part (13) restricts the movement of the second limiting part (22).

5. The refrigeration equipment according to claim 4, characterized in that, The first limiting part (13) is configured as a limiting groove, and the second limiting part (22) is configured as an elastic limiting protrusion; When the abutting protrusion (21) does not fall into the positioning recess (12) and abuts against the positioning protrusion (11), the elastic limiting protrusion is pressed into the side surface (201); After the abutting protrusion (21) falls into the positioning recess (12), the elastic limiting protrusion recovers its elastic deformation and falls into the limiting groove.

6. The refrigeration equipment according to claim 1, characterized in that, The bottom of the preservation module (20) is provided with a ventilation hole (24) that connects to the preservation chamber (210), and an oxygen regulation module (30) is provided below the preservation module (20). The oxygen regulation module (30) includes an upward-opening ventilation port (31). When the abutting protrusion (21) abuts against the upper surface (111) of the positioning protrusion (11) and slides along the upper surface (111) until the abutting protrusion (21) is aligned with the positioning recess (12), the vent (31) is aligned with the vent (24). During the process of the abutting protrusion (21) falling into the positioning recess (12), the vent (31) aligns with the vent (24).

7. The refrigeration equipment according to claim 6, characterized in that, The vent (24) is conical, and the cross-section of the vent (24) gradually decreases in the direction close to the oxygen regulating module (30); During the process of the abutting protrusion (21) falling into the positioning recess (12), the vent (24) moves downward and the vent (31) is inserted into the vent (24).

8. The refrigeration equipment according to claim 7, characterized in that, Along the vertical direction, the length of the abutment protrusion (21) is greater than the length of the vent (24).

9. The refrigeration equipment according to claim 1, characterized in that, The side (201) is also provided with a retaining edge (23) connected to the upper end of the abutting protrusion (21). During the process of the preservation module (20) being inserted into the refrigeration chamber (110) from the opening, the abutting protrusion (21) falls into the positioning recess (12) until the upper surface (111) of the positioning protrusion (11) abuts against the retaining edge (23).

10. The refrigeration equipment according to claim 1, characterized in that, The positioning protrusions (11) on both sides are symmetrically arranged, and at least two positioning recesses (12) are formed on each sidewall (101). The number of abutting protrusions (21) is set to correspond to the number of positioning recesses (12).

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