Nitrogen charging equipment for fresh-keeping cabinet

Abstract

The utility model discloses nitrogen charging equipment for a fresh-keeping cabinet, which relates to the technical field of fresh-keeping nitrogen charging and comprises a fresh-keeping cabinet body and a nitrogen storage tank, and a support plate, a controller and two L-shaped fixing rods are fixedly mounted on the side of the fresh-keeping cabinet body. The nitrogen storage tank, the controller, the connector, the gas conveying pipe and the electromagnetic valve are arranged in a matched mode, nitrogen can be filled into the freshness retaining cabinet body to retain freshness of articles in the cabinet, when a control knob is rotated, the two arc-shaped clamping plates can be driven to move face to face or back to back through a center rotating shaft, a linkage gear, an L-shaped rack, a horizontal sliding rod and an L-shaped connecting rod, and therefore freshness retaining is achieved. Meanwhile, the nitrogen storage tank can be supported and limited through the matched arrangement of a supporting plate, an L-shaped fixing rod, a sliding block and a limiting ring, then the situation that the nitrogen storage tank inclines and falls down can be effectively avoided, a user does not need to hold the nitrogen storage tank all the time with the hands, and the nitrogen storage tank is convenient to use. And the labor intensity of a user is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh-keeping nitrogen filling, in particular to nitrogen filling equipment for fresh-keeping cabinets. Background Art

[0002] Fresh-keeping cabinets can be divided into air-cooled open fresh-keeping cabinets, direct-cooled glass door fresh-keeping cabinets and vacuum nitrogen-filled fresh-keeping cabinets, etc. When using a vacuum nitrogen-filled fresh-keeping cabinet, the air in the cabinet will be extracted first, and then a certain proportion of nitrogen will be injected into the fresh-keeping cabinet using nitrogen filling equipment to isolate harmful substances such as oxygen, carbon dioxide, dust, etc., to prevent oxidation and mildew.

[0003] The patent with publication number CN217039518U in the prior art discloses a controlled atmosphere fresh-keeping display cabinet. By setting an air pump, the air inside the cabinet can be sucked during use to reduce the air content inside the cabinet, and then a proper amount of nitrogen is injected into the cabinet through a controller, a nitrogen storage tank, a solenoid valve and an air supply pipe to achieve the preservation of items in the cabinet. However, when the nitrogen storage tank needs to be replaced after long-term use, the user needs to hold the nitrogen storage tank with one hand and disassemble the clamp with the other hand to perform the replacement operation. The replacement is time-consuming and labor-intensive, the labor intensity is high, and the use is inconvenient. Therefore, in order to solve the above problems, the present application proposes a nitrogen filling device for a fresh-keeping cabinet. Utility Model Content

[0004] The purpose of the present application is to provide a nitrogen filling device for a fresh-keeping cabinet to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a nitrogen filling device for a fresh-keeping cabinet, comprising a fresh-keeping cabinet body and a nitrogen storage tank, wherein a support plate, a controller and two L-shaped fixing rods are fixedly installed on the side of the fresh-keeping cabinet body, the nitrogen storage tank is placed on the top of the support plate, a connector is detachably installed on the top of the nitrogen storage tank, a gas supply pipe is fixedly installed on the top of the connector, the end of the gas supply pipe extends into the fresh-keeping cabinet body, a solenoid valve electrically connected to the controller is fixedly installed on the gas supply pipe, sliding blocks are slidably sleeved on the two L-shaped fixing rods, and a limiting ring is fixedly installed on the sides of the two sliding blocks close to each other, and the nitrogen storage tank is placed on the top of the support plate. The storage tank is located in the limiting ring, and a hollow box is fixedly installed on the bottom of the support plate. Horizontal sliding holes are opened on both sides of the hollow box that are away from each other, and horizontal sliding rods are slidably installed in the two horizontal sliding holes. The ends of the two horizontal sliding rods that are away from each other are detachably installed with L-shaped connecting rods through fastening elements, and the ends of the two L-shaped connecting rods that are close to each other are fixedly installed with arc-shaped clamping plates that are compatible with the nitrogen storage tank. A central rotating shaft is rotatably installed on the top inner wall of the hollow box, and a linkage unit for moving the two horizontal sliding rods toward or away from each other is connected to the central rotating shaft, and the bottom end of the central rotating shaft extends to the outside of the hollow box and is fixedly installed with a control knob.

[0006] Preferably, the linkage unit comprises a linkage gear fixedly sleeved on the central rotating shaft, and L-shaped racks are fixedly mounted on the ends of the two horizontal sliding rods close to each other, and the two L-shaped racks are meshed with the linkage gear.

[0007] Preferably, a fixed block is fixedly installed on the bottom of the hollow box, a rod sliding hole is opened on the side of the fixed block, a fixed rod is slidably installed in the rod sliding hole, a plurality of fixed holes are evenly opened on the circumferential side of the control knob, one end of the fixed rod extends into one of the fixed holes, a pull block is fixedly installed on the other end of the fixed rod, and a reset unit is installed on the fixed rod.

[0008] Preferably, the reset unit comprises a convex piece fixedly sleeved on the fixed plug rod, a reset spring is sleeved on the fixed plug rod, and two ends of the reset spring are respectively fixedly mounted on the fixed block and the side of the convex piece.

[0009] Preferably, fixed magnets matching the sliding block are fixedly sleeved on the two L-shaped fixing rods, and the fixed magnets are located directly above the sliding block.

[0010] Preferably, the fastening element comprises a fastening bolt, a bolt through hole is opened on the side of the L-shaped connecting rod, a fastening screw hole is opened at the end of the horizontal sliding rod, and the end of the fastening bolt passes through the bolt through hole and is threadedly installed in the fastening screw hole.

[0011] Preferably, anti-slip pads are fixedly provided on the sides of the two arc-shaped clamping plates that are close to each other.

[0012] In summary, the technical effects and advantages of the utility model are:

[0013] 1. The utility model has a reasonable structure. Through the coordinated arrangement of the nitrogen storage tank, the controller, the connector, the gas pipe and the solenoid valve, nitrogen can be filled into the fresh-keeping cabinet body to keep the items in the cabinet fresh. When the control knob is turned, the two arc-shaped clamping plates are driven to move toward or away from each other through the central shaft, the linkage gear, the L-shaped rack, the horizontal slide bar and the L-shaped connecting rod, so that the nitrogen storage tank can be clamped or loosened. At the same time, through the coordinated arrangement of the support plate, the L-shaped fixing rod, the sliding block and the limiting ring, the nitrogen storage tank can be supported and limited, thereby effectively preventing the nitrogen storage tank from tilting and falling. Therefore, during the replacement process, the user no longer needs to hold the nitrogen storage tank with his hands, which reduces the labor intensity of the user. The operation is simple and convenient, and the practicability is good.

[0014] 2. In the utility model, when the pull block is pulled, the fixed plug rod will be driven to move out of the fixed plug hole, and the control knob will be loosened. When the pull block is loosened, the fixed plug rod will be driven to automatically reset and insert into the fixed plug hole under the elastic force of the reset spring, and the control knob will be fixed all the time, so that the loosening of the nitrogen storage tank caused by the self-rotation of the control knob can be effectively avoided during use, and the stability is good during use;

[0015] 3. In the utility model, by setting a fixed magnet, when the limiting ring is pulled upward to take and place the nitrogen storage tank, the sliding block and the limiting ring will be attracted and fixed under the magnetic force of the fixed magnet, and the user is no longer required to pull the limiting ring upward all the time, which is more convenient to use. By the matching setting of the fastening bolt and the fastening screw hole, when the fastening bolt is rotated, the L-shaped connecting rod can be fixed or loosened, thereby achieving the purpose of disassembling and replacing the L-shaped connecting rod and the arc-shaped clamping plate, and further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a nitrogen filling device for a fresh-keeping cabinet according to an embodiment of the present application;

[0018] Figure 2This is an enlarged three-dimensional structural diagram of the support plate, nitrogen storage tank and limiting ring in the embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of a partial cross-section structure of a hollow box in an embodiment of the present application;

[0020] Figure 4 It is a partially enlarged structural schematic diagram of the connection between the control knob and the fixed insertion rod in the embodiment of the present application.

[0021] In the figure: 1. Fresh-keeping cabinet body; 2. Support plate; 3. Nitrogen storage tank; 4. Controller; 5. L-shaped fixing rod; 6. Sliding block; 7. Limiting ring; 8. Hollow box; 9. Horizontal sliding rod; 10. L-shaped connecting rod; 11. Arc-shaped clamping plate; 12. Central rotating shaft; 13. Control knob; 14. Linkage gear; 15. L-shaped rack; 16. Fixing block; 17. Fixing rod; 18. Pull block; 19. Lug; 20. Return spring; 21. Fixing magnet; 22. Fastening bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example: Reference Figure 1-Figure 4A nitrogen filling device for a fresh-keeping cabinet shown in the figure comprises a fresh-keeping cabinet body 1 and a nitrogen storage tank 3. A support plate 2, a controller 4 and two L-shaped fixing rods 5 are fixedly installed on the side of the fresh-keeping cabinet body 1. The nitrogen storage tank 3 is placed on the top of the support plate 2. A connector is detachably installed on the top of the nitrogen storage tank 3. A gas supply pipe is fixedly installed on the top of the connector. The end of the gas supply pipe extends into the fresh-keeping cabinet body 1. A solenoid valve electrically connected to the controller 4 is fixedly installed on the gas supply pipe. Sliding blocks 6 are slidably sleeved on the two L-shaped fixing rods 5. A limiting ring 7 is fixedly installed on the sides of the two sliding blocks 6 close to each other. The nitrogen storage tank 3 is located in the limiting ring 7. A hollow box 8 is fixedly installed at the bottom of the plate 2. Horizontal sliding holes are opened on both sides of the hollow box 8 that are away from each other. Horizontal sliding rods 9 are slidably installed in the two horizontal sliding holes. The ends of the two horizontal sliding rods 9 that are away from each other are detachably installed with L-shaped connecting rods 10 through fastening elements. The ends of the two L-shaped connecting rods 10 that are close to each other are fixedly installed with arc-shaped clamping plates 11 that are compatible with the nitrogen storage tank 3. A central rotating shaft 12 is rotatably installed on the top inner wall of the hollow box 8. The central rotating shaft 12 is connected to a linkage unit for moving the two horizontal sliding rods 9 toward or away from each other. The bottom end of the central rotating shaft 12 extends to the outside of the hollow box 8 and is fixedly installed with a control knob 13.

[0024] By means of the above structure, nitrogen can be filled into the fresh-keeping cabinet body 1 through the coordinated arrangement of the nitrogen storage tank 3, the controller 4, the connector, the gas pipe and the solenoid valve to achieve the preservation of the items in the cabinet. When the control knob 13 is turned, the central shaft 12 will be driven to rotate. The rotation of the central shaft 12 will drive the two horizontal slide bars 9 to move toward or away from each other through the linkage unit, and then the two arc-shaped clamping plates 11 can be driven to move toward or away from each other through the L-shaped connecting rod 10, so that the nitrogen storage tank 3 can be clamped or loosened. At the same time, through the coordinated arrangement of the support plate 2, the L-shaped fixing rod 5, the sliding block 6 and the limiting ring 7, the nitrogen storage tank 3 can be supported and limited, so that the nitrogen storage tank 3 can be effectively prevented from tilting and falling. Therefore, during the replacement process, the user no longer needs to hold the nitrogen storage tank 3 with his hands, which reduces the labor intensity of the user, and the operation is simple and convenient, and the practicability is good.

[0025] As a preferred implementation of this embodiment, the linkage unit includes a linkage gear 14 fixedly sleeved on the central rotating shaft 12, and the ends of the two horizontal slide bars 9 close to each other are fixedly installed with L-shaped racks 15, and the two L-shaped racks 15 are meshed with the linkage gear 14, and the two L-shaped racks 15 are centrally symmetrically arranged. The advantage of this arrangement is that when the central rotating shaft 12 rotates, it will drive the linkage gear 14 to rotate, and the rotation of the linkage gear 14 will drive the two L-shaped racks 15 to move toward or away from each other, and then drive the two horizontal slide bars 9 to move toward or away from each other, playing a transmission role.

[0026] In this embodiment, a fixing block 16 is fixedly installed at the bottom of the hollow box 8, a rod sliding hole is provided on the side of the fixing block 16, a fixing rod 17 is slidably installed in the rod sliding hole, a plurality of fixing holes are evenly provided on the circumferential side of the control knob 13, one end of the fixing rod 17 extends into one of the fixing holes, a pull block 18 is fixedly installed at the other end of the fixing rod 17, and a reset unit is installed on the fixing rod 17. The advantage of such a setting is that when the pull block 18 is moved, the fixing rod 17 will be driven to move in or out of the fixing hole, and then the control knob 13 can be fixed or loosened, so that during use, the loosening of the nitrogen storage tank 3 caused by the self-rotation of the control knob 13 can be effectively avoided, and the stability during use is good.

[0027] In this embodiment, the reset unit includes a convex piece 19 fixedly sleeved on the fixed plug rod 17, and a reset spring 20 is sleeved on the fixed plug rod 17. The two ends of the reset spring 20 are respectively fixedly mounted on the fixed block 16 and the side of the convex piece 19. The advantage of this arrangement is that when the pull block 18 is released, the elastic force of the reset spring 20 will squeeze and push the convex piece 19 to automatically reset, and then the fixed plug rod 17 can be automatically inserted into the fixed plug hole, so that the control knob 13 is always fixed, stable and reliable.

[0028] As a preferred implementation of this embodiment, the two L-shaped fixing rods 5 are fixedly sleeved with fixed magnets 21 adapted to the sliding block 6, and the fixed magnets 21 are located directly above the sliding block 6. The advantage of this arrangement is that when the limiting ring 7 is pulled upward to take and place the nitrogen storage tank 3, the sliding block 6 will be driven to move upward together. At this time, under the magnetic force of the fixed magnets 21, the sliding block 6 and the limiting ring 7 will be attracted and fixed, and the user no longer needs to pull the limiting ring 7 upward all the time, which is more convenient to use.

[0029] As a preferred implementation of this embodiment, the fastening element includes a fastening bolt 22, a bolt through hole is provided on the side of the L-shaped connecting rod 10, a fastening screw hole is provided at the end of the horizontal sliding rod 9, and the end of the fastening bolt 22 passes through the bolt through hole and is threadedly installed in the fastening screw hole. The advantage of this arrangement is that when the fastening bolt 22 is rotated, the L-shaped connecting rod 10 can be fixed or loosened with the cooperation of the fastening screw hole, thereby achieving the purpose of disassembling and replacing the L-shaped connecting rod 10 and the arc-shaped clamping plate 11, further improving the practicality of the device.

[0030] As a preferred implementation of this embodiment, anti-skid pads are fixed on the sides of the two arc-shaped clamping plates 11 that are close to each other. The advantage of this arrangement is that the friction between the arc-shaped clamping plates 11 and the nitrogen storage tank 3 can be effectively increased through the arrangement of the anti-skid pads, and the nitrogen storage tank 3 is more stable when clamped and fixed.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nitrogen filling device for a fresh-keeping cabinet, comprising a fresh-keeping cabinet body (1) and a nitrogen storage tank (3), characterized in that: A support plate (2), a controller (4) and two L-shaped fixing rods (5) are fixedly installed on the side of the fresh-keeping cabinet body (1); the nitrogen storage tank (3) is placed on the top of the support plate (2); a connector is detachably installed on the top of the nitrogen storage tank (3); a gas supply pipe is fixedly installed on the top of the connector; the end of the gas supply pipe extends into the fresh-keeping cabinet body (1); a solenoid valve electrically connected to the controller (4) is fixedly installed on the gas supply pipe; a sliding block (6) is slidably sleeved on the two L-shaped fixing rods (5); a limiting ring (7) is fixedly installed on the sides of the two sliding blocks (6) close to each other; the nitrogen storage tank (3) is located in the limiting ring (7); and a A hollow box (8), wherein both sides of the hollow box (8) away from each other are provided with horizontal sliding holes, and horizontal sliding rods (9) are slidably installed in the two horizontal sliding holes. The ends of the two horizontal sliding rods (9) away from each other are detachably installed with L-shaped connecting rods (10) through fastening elements, and the ends of the two L-shaped connecting rods (10) close to each other are fixedly installed with arc-shaped clamping plates (11) adapted to the nitrogen storage tank (3), and a central rotating shaft (12) is rotatably installed on the top inner wall of the hollow box (8), and a linkage unit for moving the two horizontal sliding rods (9) toward or away from each other is connected to the central rotating shaft (12), and the bottom end of the central rotating shaft (12) extends to the outside of the hollow box (8) and is fixedly installed with a control knob (13).

2. The nitrogen filling device for fresh-keeping cabinet according to claim 1, characterized in that: The linkage unit comprises a linkage gear (14) fixedly sleeved on the central rotating shaft (12); an L-shaped rack (15) is fixedly mounted on one end of the two horizontal sliding rods (9) close to each other; and the two L-shaped racks (15) are meshed with the linkage gear (14).

3. The nitrogen filling device for fresh-keeping cabinet according to claim 2, characterized in that: A fixed block (16) is fixedly installed at the bottom of the hollow box (8), a rod sliding hole is provided on the side of the fixed block (16), a fixed rod (17) is slidably installed in the rod sliding hole, a plurality of fixed insertion holes are evenly provided on the circumferential side of the control knob (13), one end of the fixed insertion rod (17) extends into one of the fixed insertion holes, a pull block (18) is fixedly installed on the other end of the fixed insertion rod (17), and a reset unit is installed on the fixed insertion rod (17).

4. The nitrogen filling device for fresh-keeping cabinet according to claim 3, characterized in that: The reset unit comprises a convex piece (19) fixedly sleeved on the fixed plug rod (17), a reset spring (20) sleeved on the fixed plug rod (17), and two ends of the reset spring (20) are respectively fixedly mounted on the fixed block (16) and the side of the convex piece (19).

5. The nitrogen filling device for fresh-keeping cabinet according to claim 1, characterized in that: A fixed magnet (21) adapted to the sliding block (6) is fixedly sleeved on each of the two L-shaped fixed rods (5), and the fixed magnet (21) is located directly above the sliding block (6).

6. The nitrogen filling device for fresh-keeping cabinet according to claim 1, characterized in that: The fastening element comprises a fastening bolt (22), a bolt through hole is opened on the side of the L-shaped connecting rod (10), a fastening screw hole is opened at the end of the horizontal sliding rod (9), and the end of the fastening bolt (22) passes through the bolt through hole and is threadedly installed in the fastening screw hole.

7. The nitrogen filling device for fresh-keeping cabinet according to claim 1, characterized in that: Anti-slip pads are fixedly arranged on the sides of the two arc-shaped clamping plates (11) that are close to each other.

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