A lychee freeze-drying device bracket unit

Abstract

The utility model discloses a tray unit for placing tray for lychee freeze-drying device, the tray unit includes a plurality of slide, a plurality of bottom support frame, a plurality of heating plate, the slide sets up at heating plate both sides, is fixed through support frame, and the slide top is higher than heating plate, and the slide, heating plate are all fixed on support frame the heating plate upper surface still is provided with a plurality of heat conduction plate. The heat conduction plate includes upper plate piece, a plurality of lower plate. Upper plate piece includes bottom plate, stamping fin. The utility model has adopted the heat response type deformation's heat conduction plate structure. Under the low temperature state, heat conduction plate contracts, and separates with tray, ensures that sliding is smooth and has no friction. Under the heating state, utilize the difference of upper and lower plate piece thermal expansion coefficient, and the stamping fin of lower plate piece is heated and bends upward, and initiates and is closely contacted with tray bottom surface, changes into efficient conduction heat transfer for main from traditional radiation heat transfer for main, and the heat conduction efficiency has been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment technology, specifically a bracket unit for a lychee freeze-drying device. Background Technology

[0002] When loading materials into freeze-drying equipment, the trays carrying the materials need to be pushed in and pushed out. The heavy trays come into direct contact with the heating plate surface, generating significant friction. Pushing in and pulling out is laborious, and prolonged friction may produce metal powder, contaminating the food. Furthermore, lychees have a high water content, and their tissue structure becomes even more delicate after peeling. During freeze-drying, they are highly susceptible to collapse, shrinkage, or discoloration due to uneven heating or overheating, affecting the quality of the finished product. The trays and heating plates only have surface contact or simple radiative heat transfer, resulting in low heat conduction efficiency and making it difficult to ensure uniform temperature on the bottom of the trays. This is not conducive to precise temperature control of temperature-sensitive peeled lychees. Summary of the Invention

[0003] The purpose of this invention is to provide a bracket unit for a lychee freeze-drying device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a bracket unit for a lychee freeze-drying device, used to place a tray. The bracket unit includes several sliding rods, several bottom support frames, and several heating plates. The sliding rods are arranged on both sides of the heating plates and fixed by the support frames. The top of the sliding rods is higher than the heating plates. The sliding rods and the heating plates are all fixed on the support frames.

[0005] Furthermore, a sliding rod is installed in the center of the bracket unit, and a sliding rod is installed on each side.

[0006] Furthermore, limit slides are also provided on both sides of the bracket unit. The height of the limit slides is higher than that of the slide bar, and the limit slides are all fixed on the support frame.

[0007] Furthermore, the support frame is in the shape of an inverted E, including a horizontal base plate and several connecting plates vertically fixed above the base plate, and the sliding rod and the limiting sliding rod are fixedly installed on the connecting plates.

[0008] Furthermore, the upper surface of the heating plate is also provided with several heat-conducting plates.

[0009] Furthermore, the heat-conducting plate includes an upper plate and several lower plates. The upper plate includes a base plate and stamped fins. The base plate is a long strip of material, and the stamped fins are disposed on one side of the base plate. There is a gap between adjacent stamped fins. The stamped fins are bent upwards, and their tops are bent downwards. The lower plates are disposed below the stamped fins. The upper plate and the lower plates have different coefficients of thermal expansion. This utility model, by setting a sliding rod higher than the heating plate to support the tray, transforms the surface sliding friction between the tray and the heating plate into linear rolling or sliding friction between the tray and the sliding rod, greatly reducing the moving resistance and making the pushing and pulling operation of the tray easy and effortless. The limiting sliding rod effectively prevents the tray from lateral displacement during sliding, ensuring accurate positioning.

[0010] Furthermore, the bottom of the tray has a double-layer structure with a gap in the middle.

[0011] This invention employs a thermally responsive deformation heat-conducting plate structure. In low-temperature conditions (non-working / moving state), the heat-conducting plate contracts and separates from the tray, ensuring smooth, frictionless sliding. In the heated state, utilizing the difference in thermal expansion coefficients between the upper and lower plates, the stamped fins of the lower plate bend upwards upon heating, actively and tightly contacting the bottom surface of the tray. This transforms the traditional radiative heat transfer into highly efficient conductive heat transfer, significantly improving heat conduction efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the bracket unit of this utility model.

[0013] Figure 2 This is a partial structural diagram of the bracket unit.

[0014] Figure 3 This is a schematic diagram of the heat-conducting plate structure according to another embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] As attached Figure 1-3 As shown, the present invention relates to a lychee freeze-drying device bracket unit for placing a tray 1. The bracket unit includes several heating plates 2, sliding rods 3, limiting sliding rods 4, and support frames 5.

[0017] The slide rods 3 are set on both sides of the heating plate 2 and fixed by the support frame 5. The top of the slide rods 3 is higher than the heating plate 2, so that the tray 1 can slide easily on the slide rods when pushed in, avoiding direct contact.

[0018] Appendix Figure 1 In section 2, a slide bar 3 is provided in the center of the bracket unit, and a slide bar 3 is provided on each side.

[0019] To prevent the pallet from shifting to the left or right, limit slide rods 4 are also installed on both sides of the bracket unit. The height of the limit slide rod is higher than that of the slide rod. The slide rod and the limit slide rod are both fixed on the support frame 5. The limit slide rod 4 plays a guiding and limiting role.

[0020] The heating plate 2 is placed on the support frame 5.

[0021] Furthermore, the bottom of the tray 1 has a double-layer structure with a gap in the middle, which can improve the temperature uniformity on the tray.

[0022] The support frame 5 serves as the basic support structure for the entire unit. It is generally inverted E-shape and includes a horizontal base plate 51 and several connecting plates 52 vertically fixed above the base plate 51. The sliding rod 3 and the limiting sliding rod 4 are fixedly installed on the connecting plates 52 by welding.

[0023] Furthermore, to improve heat conduction efficiency, the heating plate 2 of this invention is also provided with several heat-conducting plates 6.

[0024] The heat-conducting plate 6 includes an upper plate 61 and several lower plates 62. The upper plate 61 includes a base plate 611 and stamped fins 612. The base plate 611 is a long strip of material, and the stamped fins 612 are disposed on one side of the base plate 611. There is a gap between adjacent stamped fins 612. The stamped fins are bent upwards, and their tops are bent downwards. The lower plates 62 are disposed below the stamped fins 612. The upper plate 61 and the lower plates 62 have different coefficients of thermal expansion.

[0025] Multiple heat-conducting plates 6 are arranged in an array on the upper surface of the heating plate 2.

[0026] When the heating plate is not in operation, the stamped fins 612 are in the first position, with their top height lower than the slide bar 3. At this time, the tray 1 can slide freely and easily on the slide bar 3 without any obstruction.

[0027] When the freeze-drying process begins, the heating plate 2 starts heating. As the heating plate heats up, the lower plate 62 expands due to heat, causing the stamped fins 612 to bend upwards, making its top height higher than the slide bar 3, and contacting the tray 1. Heat can then be quickly and evenly transferred to the tray 1 through this path.

[0028] After processing, the heating plate 2 stops working and cools down, and the stamped fins 612 fall back to the first position and separate from the bottom of the tray 1 again, so as to facilitate the removal of the tray 1.

[0029] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A tray unit for a lychee freeze-drying device, used for placing trays, characterized in that, The bracket unit includes several sliding rods, several bottom support frames, and several heating plates. The sliding rods are arranged on both sides of the heating plates and fixed by the support frames. The top of the sliding rods is higher than the heating plates. The sliding rods and heating plates are all fixed on the support frames.

2. The bracket unit according to claim 1, characterized in that, A sliding rod is installed in the center of the bracket unit, and a sliding rod is installed on each side.

3. The bracket unit according to claim 2, characterized in that, Limiting slide bars are also provided on both sides of the bracket unit. The height of the limiting slide bars is higher than that of the slide bars, and the limiting slide bars are all fixed on the support frame.

4. The bracket unit according to claim 3, characterized in that, The support frame is in the shape of an inverted E, including a horizontal base plate and several connecting plates vertically fixed above the base plate. The sliding rod and the limiting sliding rod are fixedly installed on the connecting plates.

5. The bracket unit according to claim 1, characterized in that, The upper surface of the heating plate is also provided with several heat-conducting plates.

6. The bracket unit according to claim 5, characterized in that, The heat-conducting plate includes an upper plate and several lower plates. The upper plate includes a base plate and stamped fins. The base plate is a long strip-shaped plate. The stamped fins are arranged on one side of the base plate. There is a gap between adjacent stamped fins. The stamped fins are bent upward and their tops are bent downward. The lower plates are arranged below the stamped fins. The upper plate and the lower plates have different coefficients of thermal expansion.

7. The bracket unit according to claim 1, characterized in that, The bottom of the tray has a double-layer structure with a gap in the middle.

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