Vacuum freeze-drying refrigerator

Abstract

This invention relates to the field of freeze-drying equipment technology, and provides a vacuum freeze-drying refrigerator, including a cabinet body with a freeze-drying zone inside; the freeze-drying zone has an inner liner and a vacuum cover; an air guide column is provided inside the inner liner, and a tray is fixed on the air guide column; a number of support plates, the same as the number of trays, are fixed on the outer wall of the air guide column; an extraction pipe for connecting to a vacuum pump is fixed on the outer side of the bottom of the inner liner, and an extraction channel communicating with the extraction pipe is opened inside the air guide column; a group of vent holes corresponding to each tray is opened on the outer wall of the air guide column, and each group of vent holes includes at least one vent hole. Thus, the air guide column of this invention integrates the functions of fixing support plates and extracting gas, saving internal volume; it allows the inner liner to still have sufficient capacity to hold items even after miniaturization, enabling the household refrigerator to have a freeze-drying function.

Description

Technical Field

[0001] This invention belongs to the field of freeze-drying equipment technology, and particularly relates to a vacuum freeze-drying refrigerator. Background Technology

[0002] Because freeze-dried foods undergo vacuum ice-like dehydration, they retain their original color, aroma, flavor, and appearance. They also exhibit excellent rehydration properties upon contact with water, preserving both the original flavor and extending their shelf life. Therefore, more and more foods are being preserved using vacuum freeze-drying technology, and freeze-dried foods are becoming increasingly common in daily life.

[0003] Currently, freeze-drying equipment on the market is too large to be suitable for home use, and most common household freezers do not have vacuum freeze-drying preservation functions, so users cannot make freeze-dried food at home.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] The technical problem solved by this invention is that the size of freeze-drying equipment is not suitable for home use. By integrating the functions of fixing the support plate and suction gas through the air guide column, the internal volume of the cylinder is saved; the inner cylinder still has sufficient capacity to hold items even after miniaturization, enabling home freezers to have freeze-drying functions.

[0006] To address the above problems, the present invention provides a vacuum freeze-drying refrigerator, including a cabinet body, the cabinet body having a freeze-drying zone;

[0007] The freeze-drying zone has an inner cylinder and a vacuum cover that seals with the opening of the inner cylinder; the inner cylinder is provided with a gas guide column, and at least one layer of support tray is fixed on the gas guide column.

[0008] The outer wall of the air guide column is fixed with a number of support plates equal to the number of the object tray.

[0009] The bottom outer side of the inner cylinder is fixed with a suction pipe for connecting to a vacuum pump, and the inside of the air guide column is provided with a suction channel that connects to the suction pipe; the outer wall of the air guide column is provided with a group of ventilation holes corresponding to each layer of trays, and each group of ventilation holes includes at least one ventilation hole.

[0010] According to the vacuum freeze-drying refrigerator of the present invention, a clearance hole is provided at the center of the tray, and a claw is provided in the clearance hole to be fixed to the tray; there are at least three claws, which are evenly arranged around the center of the clearance hole; the support plate is evenly arranged with the same number of support notches as the claws of the tray; a claw is correspondingly connected to each support notch; the support plate is also provided with the same number of claw holes as the claws of the tray for the claws to pass through.

[0011] According to the vacuum freeze-drying refrigerator of the present invention, the diameter of the vent holes in each layer of the vent hole group increases sequentially from bottom to top.

[0012] According to the vacuum freeze-drying refrigerator of the present invention, a plurality of suction chambers are formed in the suction channel of the air guide column, and a transition air channel is formed between two adjacent suction chambers; the cross-sectional shape of the transition air channel is "eight" shaped, with the narrow opening facing down and the wide opening facing up.

[0013] According to the vacuum freeze-drying refrigerator of the present invention, the tray has a plate.

[0014] According to the vacuum freeze-drying refrigerator of the present invention, a sealing sleeve communicating with an air extraction pipe is fixedly provided on the inner side of the bottom of the inner cylinder; a sealing cover connected to the sealing sleeve by a thread is fixedly provided at the bottom of the air guide column; an air extraction hole communicating with the air extraction channel is opened at the center of the sealing cover, and a sealing plug is provided in the air extraction hole.

[0015] According to the vacuum freeze-drying refrigerator of the present invention, the sealing plug includes a column inserted into the air extraction hole; the two ends of the column are respectively provided with an upper end cap located in the air extraction channel and a sealing bowl located in the sealing cover.

[0016] According to the vacuum freeze-drying refrigerator of the present invention, the column is a hollow structure; the upper end cover is connected to a plurality of blocks evenly arranged around the central axis of the column; an annular sealing flange is fixed on the sealing cover, and the sealing flange extends into the space between the sealing bowl and the column.

[0017] According to the vacuum freeze-drying refrigerator of the present invention, the refrigerator body further includes a freezing zone.

[0018] According to the vacuum freeze-drying refrigerator of the present invention, a fan is provided on the side of the vacuum cover facing the inner cylinder.

[0019] In summary, this invention integrates the functions of fixing the support plate and drawing gas through the air guide column, saving internal volume; it allows the inner liner to still have sufficient capacity to hold items even after miniaturization, enabling household freezers to have a freeze-drying function. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle cabinet;

[0022] Figure 3 This is a schematic diagram of the freeze-drying zone of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the vacuum cover of the present invention;

[0024] Figure 5 yes Figure 2 A sectional view along line A in the middle;

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure of region B in the middle;

[0026] Figure 7 yes Figure 6 Schematic diagram of the structure in the middle D direction;

[0027] Figure 8 yes Figure 5 Schematic diagram of the structure of region C in the middle;

[0028] Figure 9 yes Figure 8 Schematic diagram of the middle sealing plug;

[0029] In the diagram: 1-Inner liner, 11-Display tray, 111-Pattern hole, 112-Claw; 12-Evacuation pipe, 13-Sealing sleeve; 2-Vacuum cover, 21-Pressure relief plug, 22-Fan, 23-Plug head, 24-Protective cover; 3-Guide column, 31-Support plate, 311-Claw hole; 32-Ventilation hole, 33-Suction chamber, 34-Transition air passage, 35-Upper plug, 36-Sealing cover, 361-Sealing flange; 4-Sealing plug, 41-Column, 42-Upper end cover, 43-Sealing bowl, 44-Block; 100-Cabinet, 101-Freeze-drying zone, 102-Freezing zone. Detailed Implementation

[0030] See Figure 1 This invention provides a vacuum freeze-drying refrigerator, including a cabinet 100, combined with... Figure 2 The cabinet 100 has a freeze-drying area 101 and a freezing area 102.

[0031] See Figure 3 The freeze-drying zone 101 has an inner liner 1 and a vacuum cover 2 that seals with the opening of the inner liner 1.

[0032] See Figure 5 The inner cylinder 1 is provided with an air guide column 3, and at least one layer of tray 11 is fixed on the air guide column 3; the tray 11 is used to hold vegetable or fruit slices.

[0033] The tray 11 can be multi-layered, such as three, four, or five layers. Those skilled in the art can adapt the number of trays 11 according to the design specifications of the freezer.

[0034] Combined Figure 6 The outer wall of the air guide column 3 is fixed with a number of support plates 31 equal to the number of trays 11; combined with Figure 7The tray 11 has a clearance hole at its center, and a claw 112 fixed to the tray 11 is provided in the clearance hole; there are at least three claws 112, which are evenly arranged around the center of the clearance hole.

[0035] The support plate 31 is evenly provided with the same number of support notches as the support claws 112 of the tray 11; each support notch is connected to a corresponding support claw 112; so that the tray 11 can be stably hung on the air guide column 3.

[0036] Even better, the support plate 31 is also provided with the same number of claw holes 311 as the claws 112 of the pallet 11; the pallet 11 rotates at a certain angle relative to the air column 3, and each claw 112 passes through the corresponding claw hole 311, so that the pallet 11 reaches the position of the support plate 3 of the next layer, which facilitates the sequential installation and disassembly of the multi-layer pallets 11.

[0037] Furthermore, the tray 11 has a perforation 111 to facilitate the flow of airflow between different layers of trays 11 inside the cylinder.

[0038] Combination Figure 8 The inner cylinder 1 has an outer bottom of which a suction pipe 12 for connecting to a vacuum pump is fixedly installed, and a sealing sleeve 13 connected to the suction pipe 12 is fixedly installed on the inner bottom of the cylinder; the bottom of the air guide column 3 has a sealing cap 36 that is threadedly connected to the sealing sleeve 13.

[0039] Even better, a sealing ring can be provided between the sealing cap 36 and the sealing sleeve 13 to improve the sealing performance and prevent gas from passing through the threaded connection between the two.

[0040] The air guide column 3 has an air extraction channel inside; the sealing cover 36 has an air extraction hole at the center that connects to the air extraction channel; the outer wall of the air guide column 3 has a group of ventilation holes corresponding to each layer of tray 11, and each group of ventilation holes includes at least one ventilation hole 32.

[0041] The ventilation holes 32 of each ventilation hole group are corresponding to the gas that is drawn from the tray 11 of that layer;

[0042] This invention uses the air guide column 3 to simultaneously draw gas from each tray 11, resulting in high gas extraction efficiency and facilitating rapid dehydration of preserved items.

[0043] Because the vent holes 32 of the lowest vent group are closer to the suction pipe 12, the suction force is greater; while the vent holes 32 of the uppermost vent group are farther from the suction pipe 12, the suction force is smaller. To improve the synchronicity of gas suction in each layer of the support tray 11, the diameter of the vent holes 32 in each vent group increases sequentially from bottom to top. Within a unit time, the amount of gas drawn away by the vent holes 32 in each layer is basically the same, thus improving the synchronicity of gas suction in each layer.

[0044] Even better, multiple suction chambers 33 are formed in the suction channel of the air guide column 3, and a transition air channel 34 is formed between two adjacent suction chambers 33; the cross-sectional shape of the transition air channel 34 is "eight" shaped, and the narrow opening faces the lower outlet of the air guide column 3.

[0045] The airflow is concentrated at the narrow opening of the transition airway 34, resulting in an increased flow velocity. This, in turn, creates a negative suction effect at the wide opening, thereby creating a suction effect at the vent 32 of this layer, which fully removes the layer's support plate 11.

[0046] Preferably, the shape of the holes 111 on the tray 11 is elongated, which promotes the longitudinal flow of air and facilitates the synchronous extraction of gas from the cylinder.

[0047] Further, see Figure 4 A fan 22 is provided on the side of the vacuum cover 2 facing the inside of the cylinder to promote longitudinal airflow. Preferably, a protective cover 24 is provided on the outside of the fan 22 and fixed to the vacuum cover 2; preferably, a pressure relief plug 21 is also provided on the vacuum cover 2; before opening the vacuum cover 2, the pressure relief plug 21 is pulled out to release the pressure inside the cylinder and facilitate opening.

[0048] Preferably, to prevent the air guide column 3 from tilting due to shaking when the cabinet 100 moves, an upper plug 35 is provided at the upper port of the air guide column 3; a plug head 23 is provided at the center of the fan 22, and a corresponding plug hole is provided on the upper plug 35; the plug head 23 is inserted into the plug hole to improve the stability of the air guide column 3.

[0049] See Figure 9 To improve the overall sealing performance, as one embodiment, the sealing cover 36 is provided with a sealing plug 4 in the air extraction hole; the sealing plug 4 includes a column 41 inserted into the air extraction hole; the two ends of the column 41 are respectively provided with an upper end cap 42 located in the air extraction channel and a sealing bowl 43 located in the sealing cover 36.

[0050] During air extraction, the airflow enters the sealing cover 36 from the extraction channel, the sealing plug 4 is stretched and deformed, and the diameter of the column 41 decreases, thereby creating a gap in the extraction hole to allow airflow to pass through; preferably, the column 41 of the present invention has a hollow structure, and its diameter is easily reduced when stretched; the upper end cover 42 is connected to a plurality of baffles 44 evenly arranged around the central axis of the column 41; when stretched and deformed, the airflow passes through the gap between adjacent baffles 44.

[0051] When the cylinder is kept under vacuum, external gas tends to enter the suction channel from the sealing cap 36. At this time, the sealing bowl 43 is deformed by pressure and only sticks to the sealing cap 36, preventing gas from entering. Better yet, an annular sealing flange 361 is fixed on the sealing cap 36, and the sealing flange 361 extends into the space between the sealing bowl 43 and the column 41; when the sealing bowl 43 is compressed and deformed by external gas, the sealing bowl 43 and the sealing flange 361 fit together to improve the sealing performance.

[0052] The sealing plug 4 of the present invention is preferably made of rubber.

[0053] The air guide column 3 of the inner liner 1 of this invention integrates the functions of fixing the support plate 31 and absorbing gas, saving internal volume; thus, the inner liner 1 still has sufficient capacity to hold items even after miniaturization. This invention utilizes the -40°C function of the freezer, and in conjunction with the miniaturized inner liner 1, enables the household freezer to have a freeze-drying function.

[0054] In summary, this invention provides a vacuum freeze-drying refrigerator that integrates the functions of a fixed support plate and gas suction through an air guide column, saving internal volume; it allows the inner cylinder to still have sufficient capacity to hold items even after miniaturization, thus enabling household refrigerators to have freeze-drying capabilities.

[0055] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A vacuum freeze-drying refrigerator, characterized in that, Includes the cabinet, which contains a freeze-drying area; The freeze-drying zone has an inner cylinder and a vacuum cover that seals with the opening of the inner cylinder; the inner cylinder is provided with a gas guide column, and at least one layer of support tray is fixed on the gas guide column. The outer wall of the air guide column is fixed with a number of support plates equal to the number of the object tray. The bottom outer side of the inner cylinder is fixed with a suction pipe for connecting to a vacuum pump, and the inside of the air guide column is provided with a suction channel that connects to the suction pipe; the outer wall of the air guide column is provided with a group of ventilation holes corresponding to each layer of trays, and each group of ventilation holes includes at least one ventilation hole.

2. The vacuum freeze-drying refrigerator as described in claim 1, characterized in that, The center of the tray has a clearance hole, and a claw is fixed to the tray in the clearance hole; there are at least three claws, which are evenly arranged around the center of the clearance hole; the support plate has a number of support notches evenly arranged around the tray, the same as the number of claws on the tray; each support notch has a corresponding claw; the support plate also has a number of claw holes for the claws to pass through, the same as the number of claws on the tray.

3. The vacuum freeze-drying refrigerator as described in claim 1, characterized in that, From bottom to top, the diameter of the vent holes in each vent group increases sequentially.

4. The vacuum freeze-drying refrigerator as described in claim 3, characterized in that, The air guide column has multiple suction chambers formed in its suction channel, and a transition air channel is formed between two adjacent suction chambers; the cross-sectional shape of the transition air channel is "eight" shaped, with the narrow opening facing down and the wide opening facing up.

5. The vacuum freeze-drying refrigerator as described in claim 3, characterized in that, The tray has a perforation.

6. The vacuum freeze-drying refrigerator as described in any one of claims 1 to 5, characterized in that, A sealing sleeve connected to the air extraction pipe is fixed to the inner bottom of the inner cylinder; a sealing cap connected to the sealing sleeve is fixed to the bottom of the air guide column; an air extraction hole connected to the air extraction channel is opened at the center of the sealing cap, and a sealing plug is provided in the air extraction hole.

7. The vacuum freeze-drying refrigerator as described in claim 6, characterized in that, The sealing plug includes a column inserted into the air extraction hole; the two ends of the column are respectively provided with an upper end cap located in the air extraction channel and a sealing bowl located in the sealing cap.

8. The vacuum freeze-drying refrigerator as described in claim 7, characterized in that, The column is a hollow structure; the upper end cover is connected to multiple blocks that are evenly arranged around the central axis of the column; the sealing cover is fixed with an annular sealing flange that extends into the space between the sealing bowl and the column.

9. The vacuum freeze-drying refrigerator as described in claim 6, characterized in that, The cabinet also has a freezer compartment.

10. The vacuum freeze-drying refrigerator as described in claim 6, characterized in that, A fan is provided on the side of the vacuum cover facing the inner cylinder.

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