Protective structure and refrigeration equipment

Abstract

The invention discloses a protection structure and refrigeration equipment, and the protection structure comprises a limiting device which is installed on a fixing part, and the limiting device comprises a containing cavity and a plunger latch assembly used for opening or closing the containing cavity; the anti-disengaging device is installed on the movable part and comprises a locking limiting block used for pushing the plunger latch assembly to be opened. The plunger latch assembly is reset and closed after the locking limiting block enters the containing cavity, so that the locking limiting block is limited in the containing cavity. Stable protection is provided for the movable part through the limiting device and the anti-disengaging device which are matched with each other, using is convenient and fast, and fixing is reliable.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and more particularly to a protective structure and a refrigeration device. Background Art

[0002] In the field of household appliances, many products are provided with movable parts (movable components) and fixedly installed box structures (fixed components), such as the baking trays of ovens, the drums of washing machines, the turntables of microwave ovens, etc. Such movable components usually need to have the characteristics of being detachable or adjustable to meet the usage requirements, but they must be firmly fixed during transportation to avoid damage. Currently, there are generally problems such as insecure fixation and inconvenient disassembly and assembly in the industry's fixation methods for movable components, and these problems are particularly prominent in large household appliances.

[0003] Taking the refrigerator product as an example, its interior is usually provided with a glass shelf as a typical movable component. With the increasing demand of consumers for large-capacity refrigerators, the size and weight of the shelf have been continuously increasing, which makes the fixation problem of the shelf during transportation particularly prominent. Currently, the industry generally uses buffer materials such as sponges, foams or tapes to fix the glass shelf, and this method has the following technical defects:

[0004] 1. The fixation method is complex and costly. Traditional protection solutions usually require manual pasting or wrapping of buffer materials, which is not only cumbersome to operate but also increases the production cost. In addition, foam or sponge materials are prone to aging and falling off, and may fail under long-term transportation or extreme environments, resulting in unstable protection effects.

[0005] 2. It is difficult to meet the requirements of transportation tests. In laboratory tests simulating transportation environments (such as harsh conditions like dropping and vibration), the existing protection methods often cannot effectively fix large-size and heavy glass shelves, resulting in frequent unqualified problems such as the shelf falling off and the rib of the inner container being damaged. Especially for refrigerators with a larger width, their shelf sizes are large and heavy, and the packaging and protection inside the refrigerator are more difficult, exacerbating the transportation risks.

[0006] 3. If the glass shelf becomes loose or damaged during transportation, it will not only increase the after-sales maintenance cost but also may affect the user's trust in the product.

[0007] Therefore, how to design a protective structure that is convenient to install and reliably fixed is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0008] In order to solve the defects of the existing technology in the fixation and protection of movable components, the present invention provides a protective structure and a refrigeration device, which use a mutually cooperating limiting device and anti-disengagement device to provide stable protection for the movable component, with convenient use and reliable fixation.

[0009] The technical solution adopted by the present invention is to design a protection structure, including:

[0010] A limiting device, which is installed on a fixing member. The limiting device includes: a receiving cavity and a latch assembly for opening or closing the receiving cavity;

[0011] A anti-disengagement device, which is installed on a movable member. The anti-disengagement device includes: a locking limiting block for pushing the latch assembly to open;

[0012] Wherein, after the locking limiting block enters the receiving cavity, the latch assembly resets and closes to limit the locking limiting block within the receiving cavity.

[0013] Further, the latch assembly includes: two wedge-shaped latches arranged oppositely, and two latch springs for forcing the two wedge-shaped latches to reset and close. When the locking limiting block enters the receiving cavity, it pushes open the latch assembly along the inclined surfaces of the two wedge-shaped latches.

[0014] Further, one end of the locking limiting block away from the movable member is provided with a first wedge-shaped surface; wherein, when the locking limiting block enters the receiving cavity, the first wedge-shaped surface fits with the two wedge-shaped latches.

[0015] Further, the anti-disengagement device further includes: a connecting rod, and an unlocking limiting block for pushing the latch assembly to open. The locking limiting block is fixed on the connecting rod, the unlocking limiting block is movably sleeved on the connecting rod, and the unlocking limiting block can move between the movable member and the locking limiting block. One end of the unlocking limiting block away from the locking limiting block is provided with a second wedge-shaped surface, and one end of the unlocking limiting block close to the locking limiting block is provided with a contact surface, and the contact surface can cover the locking limiting block; wherein, when the unlocking limiting block enters the receiving cavity, it pushes open the latch assembly along the inclined surfaces of the two wedge-shaped latches, and when the unlocking limiting block exits the receiving cavity, it pushes open the latch assembly by relying on the second wedge-shaped surface.

[0016] Further, the anti-disengagement device further includes: a supporting elastic member abutted between the locking limiting block and the unlocking limiting block. The locking limiting block and / or the unlocking limiting block is provided with a groove, and after being squeezed, the supporting elastic member is received in the groove so that the contact surface can fit with the locking limiting block.

[0017] Further, the limiting device further includes: a limiting pin that is controlled to extend into or withdraw from the receiving cavity. When the limiting pin extends into the receiving cavity, the receiving cavity is divided into two regions. The region between the limiting pin and the latch assembly is a limiting cavity, and the limiting cavity is used for positioning the locking limiting block.

[0018] Further, the limiting device further includes: an electrically controlled elastic member, and the movable end of the electrically controlled elastic member is connected to the limiting pin, and the limiting pin is pushed to move by switching the energized state of the electrically controlled elastic member.

[0019] Further, the protection structure further includes: a detection component, which has a temperature sensing element for detecting the actual temperature of the movable part and / or a pressure sensing element for detecting the actual pressure of the limit pin; wherein, the movement state of the limit pin is controlled by the detection signal of the detection component.

[0020] The present invention also provides a refrigeration device, which adopts the above protection structure.

[0021] In some embodiments, the refrigeration device is a refrigerator, the fixed part is the box body, and the movable part is the shelf.

[0022] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0023] 1. A limiting device is arranged on the fixed part, and a anti-disengagement device is arranged on the movable part. After the locking limit block pushes open the latch assembly and enters the receiving cavity of the limiting device, the latch assembly resets and closes to limit the locking limit block in the receiving cavity. The mutually cooperating limiting device and anti-disengagement device provide stable protection for the movable part, canceling the box liner limiting rib strips in the prior art, making the box liner structure simpler and the foam quality of the box body better;

[0024] 2. The anti-disengagement device is also provided with an unlocking limit block. When the anti-disengagement device moves inward with the movable part, the unlocking limit block pushes open the latch assembly and enters the receiving cavity of the limiting device. Both the unlocking limit block and the locking limit block are in the receiving cavity. When the anti-disengagement device moves outward with the movable part, the unlocking limit block pushes open the latch assembly by relying on the second wedge surface, and the locking limit block follows the unlocking limit block and exits the receiving cavity together, realizing the easy removal of the movable part;

[0025] 3. The limiting device is also provided with a movable limit pin. When the limit pin extends into the receiving cavity, it positions the locking limit block in the limiting cavity, preventing the locking limit block from shaking, so that the movable part is stably fixed. When the limit pin exits the receiving cavity, the limiting function is cancelled, leaving a movement space for the locking limit block, enabling the unlocking limit block to push open the latch assembly and enter the receiving cavity, and allowing the user to easily operate and disassemble the movable part. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in detail below with reference to the embodiments and the drawings, wherein:

[0027] Figure 1 is a three-dimensional internal view of the refrigerator of the present invention;

[0028] Figure 2 is a side internal view of the refrigerator of the present invention;

[0029] Figure 3 is a schematic view of the shelf of the present invention;

[0030] Figure 4 is a schematic view of the limiting device of the present invention;

[0031] Figure 5 is a schematic diagram of the anti - detachment device of the present invention;

[0032] Figure 6 is a schematic diagram of the disassembled anti - detachment device of the present invention;

[0033] Figures 7a to 7c is a schematic diagram of the installation process of the present invention;

[0034] Figure 8 is a schematic diagram of the disassembly of the present invention;

[0036] 1. Limit device; 2. Anti - detachment device; 3. Fixing member; 31. Shelf installation area; 4. Movable member; 41. Rear decorative strip; 42. Glass main body;

[0037] 10. Accommodating cavity; 11. Electrically controlled elastic member; 12. First latch spring; 13. Second latch spring; 14. First wedge - shaped latch; 15. Second wedge - shaped latch; 16. Limit pin; 17. Installation box;

[0038] 211. Locking limit block; 212. Support elastic member; 213. Connecting rod; 214. Unlocking limit block; 215. Screw. Specific embodiments

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] As Figures 1 to 3 shown, the protection structure proposed by the present invention is applicable to the installation and fixation between the fixing member 3 and the movable member 4, which is commonly found in application scenarios such as household appliances, for example, in a refrigerator, where a glass shelf is usually provided inside as a typical movable member, and during the transportation test, it is necessary to fix the glass shelf to the box body to avoid problems such as the shelf falling off and the inner liner being damaged.

[0041] As Figures 4 to 6As shown in the figure, specifically, the protection structure includes: a limiting device 1 installed on the fixed part 3 and a anti-disengagement device 2 installed on the movable part 4. The limiting device 1 includes an installation box 17 and a latch assembly. The installation box 17 has a receiving cavity 10. An opening is provided on one side of the receiving cavity 10 close to the movable part 4. The latch assembly is used to open or close the opening of the receiving cavity 10. The anti-disengagement device 2 includes a locking limiting block 211, and the locking limiting block 211 is used to push the latch assembly open so that the locking limiting block 211 can enter the receiving cavity 10. After the locking limiting block 211 enters the receiving cavity 10, the latch assembly resets and closes, restricting the locking limiting block 211 in the receiving cavity 10, effectively preventing the locking limiting block 211 from disengaging from the receiving cavity 10 during transportation, and realizing the reliable installation of the fixed part 3 and the movable part 4.

[0042] As Figures 1 to 3 shown, taking a refrigerator as an example, the fixed part 3 is the box body, and the movable part 4 is the shelf. The shelf includes a glass main body 42, a front decorative strip clamped on the front side of the glass main body 42, and a rear decorative strip 41. The box body is provided with a shelf installation area 31 for placing the shelf. The limiting device 1 is fixed inside the shelf installation area 31, and the anti-disengagement device 2 is installed on the rear decorative strip 41. The positions of the limiting device 1 and the anti-disengagement device 2 correspond to each other. The protection structure of the present invention can provide stable protection for the movable part 4 by using the mutually cooperating limiting device 1 and anti-disengagement device 2, cancel the box liner limiting rib strips in the prior art, make the box liner structure simpler, and optimize the foaming quality of the box body.

[0043] The type of the latch assembly can be selected according to the actual use situation, and it is feasible to adopt methods such as electric control opening and closing or mechanical opening and closing. The following takes the preferred embodiment of the present invention as an example for illustration.

[0044] As Figure 4 shown, the latch assembly includes: two wedge-shaped latches and two latch springs. The two wedge-shaped latches are the first wedge-shaped latch 14 and the second wedge-shaped latch 15 respectively. The two latch springs are the first latch spring 12 and the second latch spring 13 respectively. The two wedge-shaped latches are arranged oppositely and move in opposite directions. The two latch springs are respectively supported at the opposite ends of the two wedge-shaped latches.

[0045] As Figure 7a 、 7b shown, when the locking limiting block 211 enters the receiving cavity 10, it pushes open the latch assembly along the inclined surfaces of the first wedge-shaped latch 14 and the second wedge-shaped latch 15, and the first latch spring 12 and the second latch spring 13 are compressed by the force. As Figure 7cAs shown, after the locking limit block 211 enters the receiving cavity 10 of the limiting device 1, the first latch spring 12 and the second latch spring 13 provide a restoring force, forcing the first wedge latch 14 and the second wedge latch 15 to reset and close, restricting the locking limit block 211 within the receiving cavity 10. This design utilizes double wedge slopes to achieve lightweight unlocking with a distinct tactile sensation, and can still maintain stable locking and controllable separation under harsh transportation environments, having multiple advantages such as simple structure, convenient installation, and high reliability.

[0046] As an optimization, as Figure 4 shown, one end of the locking limit block 211 away from the movable part 4 is provided with a first wedge surface, that is, one end of the locking limit block 211 facing the latch assembly is provided with a first wedge surface. When the locking limit block 211 enters the receiving cavity 10, the first wedge surface fits with the first wedge latch 14 and the second wedge latch 15. This design utilizes the complementary contact between the first wedge surface of the locking limit block 211 and the slopes of the wedge latches, making the thrust generated by the inward movement of the locking limit block 211 more evenly distributed, and more smoothly pushing the first wedge latch 14 and the second wedge latch 15 to open.

[0047] As Figure 5 、 6 shown, on the basis of the preferred embodiment, the anti-disengagement device 2 further includes: a connecting rod 213 and an unlocking limit block 214. The first end of the connecting rod 213 is fixed to the movable part 4 by screws. The second end of the connecting rod 213 extends towards the receiving cavity 10. The locking limit block 211 is fixed to the second end of the connecting rod 213. The unlocking limit block 214 is movably sleeved on the connecting rod 213, and the unlocking limit block 214 can move between the movable part 4 and the locking limit block 211. The function of the unlocking limit block 214 is to push the latch assembly to open, and the latch assembly can be opened during the process of the unlocking limit block 214 entering and exiting the receiving cavity 10.

[0048] Specifically, one end of the unlocking limit block 214 away from the locking limit block 211 is provided with a second wedge surface, and one end of the unlocking limit block 214 close to the locking limit block 211 is provided with a contact surface. The contact surface can cover the locking limit block 211, that is, the edge of the contact surface exceeds the locking limit block 211 or the edge of the contact surface is flush with the locking limit block 211, to ensure that when the unlocking limit block 214 exits the receiving cavity 10 outward, the locking limit block 211 can follow the unlocking limit block 214 to exit the receiving cavity 10 together and will not be intercepted by the latch assembly.

[0049] As Figure 8As shown, during the process of disassembling the movable part, when the user pushes the movable part 4 inward, and the anti-detachment device 2 moves inward with the movable part 4, the unlocking limit block 214 pushes the latch assembly along the inclined surfaces of the two wedge latches and enters the accommodation cavity 10 of the limit device 1. At this time, both the unlocking limit block 214 and the locking limit block 211 are within the accommodation cavity 10. Then the user pulls the movable part 4 outward. When the anti-detachment device 2 moves outward with the movable part 4, the unlocking limit block 214 pushes the latch assembly by relying on its own second wedge surface, and the locking limit block 211 follows the unlocking limit block 214 and exits the accommodation cavity 10 together. This design is ingenious, and through two simple actions of pushing and pulling, the movable part 4 can be easily taken out.

[0050] On the basis of designing the unlocking limit block, as Figure 5 、 6 shown, as an optimization, the anti-detachment device 2 further includes: a supporting elastic member 212. The supporting elastic member 212 is sleeved on the connecting rod 213 and abuts between the locking limit block 211 and the unlocking limit block 214. The locking limit block 211 and / or the unlocking limit block 214 is provided with a groove. After being squeezed, the supporting elastic member 212 is accommodated in the groove so that the contact surface can fit the locking limit block 211. The supporting elastic member 212 can be a spring. Usually, both the locking limit block 211 and the unlocking limit block 214 are provided with grooves. After being squeezed, a part of the supporting elastic member 212 is accommodated in the groove of the unlocking limit block 214, and the other part is accommodated in the groove of the locking limit block 211.

[0051] In the natural state, the supporting elastic member 212 forces the locking limit block 211 and the unlocking limit block 214 to remain separated. During the installation process of the movable part 4, the unlocking limit block 214 will not enter the accommodation cavity 10, avoiding interfering with the normal locking of the locking limit block 211. In the compressed state, the supporting elastic member 212 is completely accommodated in the groove, and the locking limit block 211 fits on the contact surface of the unlocking limit block 214, so that the locking limit block 211 can follow the unlocking limit block 214 and exit the accommodation cavity 10 together without being intercepted by the latch assembly.

[0052] As Figure 4As shown, in some feasible embodiments of the present invention, the limiting device 1 further includes: a limiting pin 16, which is controlled to extend into or withdraw from the receiving cavity 10. When the limiting pin 16 extends into the receiving cavity 10, the receiving cavity 10 is divided into two regions. The region between the limiting pin 16 and the latch assembly is the limiting cavity, and the limiting cavity is used to position and lock the locking limiting block 211. When the locking limiting block 211 pushes the latch assembly into the receiving cavity 10, the first wedge-shaped latch 14 and the second wedge-shaped latch 15 are reset and closed. The limiting pin 16 extends into the receiving cavity 10 to block the continuous movement of the locking limiting block 211. The locking limiting block 211 is clamped between the limiting pin 16 and the latch assembly, preventing the locking limiting block 211 from shaking, and stably fixing the moving part 4. For the preferred embodiment of designing the unlocking limiting block 214, when the limiting pin 16 withdraws from the receiving cavity 10, the limiting function is cancelled, leaving a movement space for the locking limiting block 211, so that the unlocking limiting block 214 can push the latch assembly into the receiving cavity 10, and the user can easily operate to disassemble the moving part 4.

[0053] The driving method of the limiting pin 16 can be selected according to the actual use situation, and methods such as electric control driving or mechanical driving can be adopted. The following takes the feasible embodiments of the present invention as examples for illustration.

[0054] As Figure 4 shown, the limiting device further includes: an electrically controlled elastic member 11, which can be an electromagnetic spring, etc. The movable end of the electrically controlled elastic member 11 is connected to the limiting pin 16, and the limiting pin 16 is pushed to move by switching the energization state of the electrically controlled elastic member 11. For example, the electrically controlled elastic member 11 extends when powered off and compresses when powered on. This design realizes the active telescopic control of the limiting pin through the switching of the electrically controlled elastic member, and can quickly lock / unlock in a non-contact state, combining mechanical reliability and electronic control convenience.

[0055] In order to more accurately control the limiting pin 16 to adapt to the installation and disassembly of the moving part 4, the protection structure further includes: a detection component, which has a temperature sensing member for detecting the actual temperature of the moving part 4 and / or a pressure sensing member for detecting the actual pressure of the limiting pin 16. The temperature sensing member is arranged on the moving part 4, and preferably, the temperature sensing member is arranged in the holding area of the moving part 4 for the user to push and operate the moving part 4. The pressure sensing member is arranged on the limiting pin 16, and the movement state of the limiting pin 16 is controlled by the detection signal of the detection component. Usually, the detection component includes a temperature sensing member and a pressure sensing member, and the limiting pin 16 is controlled to extend into or withdraw from the receiving cavity 10 according to the signals of the temperature sensing member and the pressure sensing member.

[0056] The following takes an application example of the present invention as an example to describe in detail the working process of the protection structure. The movable member 4 is a shelf, and the fixed member 3 is a box body. The box body is provided with a shelf installation area 31 for placing the shelf. The limiting device 1 is fixed inside the shelf installation area 31, and the anti-disengagement device 2 is installed at the rear side of the shelf. The positions of the limiting device 1 and the anti-disengagement device 2 correspond to each other.

[0057] As Figure 7a , 7b shown, during the installation of the shelf, the shelf is placed on the shelf installation area 31 and pushed inward. The locking limit block 211 gradually pushes open the first wedge latch 14 and the second wedge latch 15. As Figure 7c shown, when the locking limit block 211 enters the accommodation cavity 10, the first wedge latch 14 and the second wedge latch 15 reset and close. The limit pin 16 is controlled to extend into the accommodation cavity 10 to block the continuous movement of the locking limit block 211. The locking limit block 211 is clamped between the limit pin 16 and the latch assembly, and the locking limit block 211 cannot move back and forth, so that the shelf is stably fixed on the shelf installation area 31.

[0058] As Figure 7c shown, when the shelf needs to be disassembled, the user first pushes the shelf into the box. The temperature sensing member detects the human body temperature, and the pressure sensing member detects that the limit pin 16 is subjected to the pressure towards the inner side of the box body. The limit pin 16 is controlled to withdraw from the accommodation cavity 10. The shelf is pushed into the box until the unlocking limit block 214 pushes open the latch assembly and enters the accommodation cavity 10 of the limiting device 1. At this time, both the unlocking limit block 214 and the locking limit block 211 are in the accommodation cavity 10. Then the user pulls the shelf outwards. The unlocking limit block 214 relies on its second wedge surface to push open the first wedge latch 14 and the second wedge latch 15, and the locking limit block 211 follows the unlocking limit block 214 to withdraw from the accommodation cavity 10 together, and the shelf can be easily taken out.

[0059] As Figure 1 , 2 shown, the present invention also proposes a refrigeration device, which includes but is not limited to a refrigerator. By adopting the above protection structure, the mutually cooperating limiting device and anti-disengagement device can provide stable protection for the movable member, which is convenient to use and reliable to fix.

[0060] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The execution order of actions, steps, etc. in the devices and methods shown in the specification and drawings can be implemented in any order as long as there is no specific explicit order limitation and the output of the previous process is not used in the subsequent process. The similar sequential terms used for convenience of description do not mean that implementation must be in such an order.

[0061] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof in subsequent figures is not required.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Protective structure, characterized in that, Comprising: A limiting device, which is installed on a fixed part, and the limiting device includes: a receiving cavity and a latch assembly for opening or closing the receiving cavity; A anti-disengagement device, which is installed on a movable part, and the anti-disengagement device includes: a locking and limiting block for pushing the latch assembly to open; Wherein, after the locking and limiting block enters the receiving cavity, the latch assembly resets and closes to limit the locking and limiting block in the receiving cavity.

2. The protective structure according to claim 1, wherein The latch assembly includes: two wedge-shaped latches arranged oppositely, and two latch springs for forcing the two wedge-shaped latches to reset and close. When the locking and limiting block enters the receiving cavity, it pushes open the latch assembly along the inclined surfaces of the two wedge-shaped latches.

3. The protective structure according to claim 2, characterized in that, One end of the locking and limiting block away from the movable part is provided with a first wedge-shaped surface; wherein, when the locking and limiting block enters the receiving cavity, the first wedge-shaped surface fits with the two wedge-shaped latches.

4. The protective structure according to claim 2, wherein The anti-disengagement device further includes: a connecting rod, and an unlocking and limiting block for pushing the latch assembly to open. The locking and limiting block is fixed on the connecting rod, the unlocking and limiting block is movably sleeved on the connecting rod, and the unlocking and limiting block can move between the movable part and the locking and limiting block. One end of the unlocking and limiting block away from the locking and limiting block is provided with a second wedge-shaped surface, and one end of the unlocking and limiting block close to the locking and limiting block is provided with a contact surface, and the contact surface can cover the locking and limiting block; Wherein, when the unlocking and limiting block enters the receiving cavity, it pushes open the latch assembly along the inclined surfaces of the two wedge-shaped latches, and when the unlocking and limiting block exits the receiving cavity, it pushes open the latch assembly by relying on the second wedge-shaped surface.

5. The protective structure according to claim 4, characterized in that, The anti-disengagement device further includes: a supporting elastic member abutted between the locking and limiting block and the unlocking and limiting block. The locking and limiting block and / or the unlocking and limiting block are provided with grooves, and after being compressed, the supporting elastic member is received in the grooves so that the contact surface can fit with the locking and limiting block.

6. The protective structure according to any one of claims 1 to 5, characterized in that, The limiting device further includes: a limiting pin that is controlled to extend into or withdraw from the receiving cavity. When the limiting pin extends into the receiving cavity, the receiving cavity is divided into two regions. The region between the limiting pin and the latch assembly is a limiting cavity, and the limiting cavity is used for positioning the locking and limiting block.

7. The protection structure according to claim 6, wherein The limiting device further includes: an electrically controlled elastic member, and the movable end of the electrically controlled elastic member is connected to the limiting pin, and the limiting pin is pushed to move by switching the energized state of the electrically controlled elastic member.

8. The protective structure according to claim 6, wherein The protection structure further includes: a detection assembly, which has a temperature sensing member for detecting the actual temperature of the movable part and / or a pressure sensing member for detecting the actual pressure of the limiting pin; Wherein, the movement state of the limiting pin is controlled by the detection signal of the detection assembly.

9. Refrigeration equipment, characterized in that, The refrigeration device adopts the protection structure according to any one of claims 1 to 8.

10. The refrigeration device according to claim 9, characterized in that, The refrigeration device is a refrigerator, the fixed part is a box body, and the movable part is a shelf.

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