A fresh-keeping container gas regulating device

Abstract

The utility model discloses a kind of fresh-keeping container gas regulation and control devices, it is related to the field of fresh-keeping container, to solve the problem that the gas proportion in fresh-keeping container is different when the gas output after target gas mixing in prior art is transported, affect the preservation of goods. The spiral channel formed by every one described spiral vane and the inner wall of mixing box and fixed outer tube is separated by another two described spiral vane to form first gas channel, second gas channel and third gas channel, every group described first gas channel, second gas channel and third gas channel are communicated, and the uppermost end outside annular array of mixing box side wall along first gas channel is provided with first air inlet, and the lower end of mixing box side wall along first air inlet is provided with second air inlet and third air inlet, and first air inlet, second air inlet and third air inlet are communicated with corresponding first gas channel, second gas channel and third gas channel respectively.

Description

Technical Field

[0001] This utility model relates to the field of refrigerated containers, specifically a gas control device for refrigerated containers. Background Technology

[0002] As a core piece of equipment in modern cold chain logistics systems, refrigerated containers are widely used for the long-distance transportation and storage of perishable goods such as fruits, vegetables, meat, flowers, and pharmaceuticals. Their core function lies in precisely controlling the internal environmental parameters to inhibit the respiration of goods and slow down microbial growth, thereby maximizing the preservation period and maintaining quality. Among these, gas composition control technology is a crucial aspect of refrigerated containers, especially for high-value agricultural products and goods sensitive to oxygen (O2) and carbon dioxide (CO2).

[0003] Traditional refrigerated containers primarily rely on natural diffusion or passive ventilation systems for gas control. For example, Chinese patent CN 220088453 U (A Gas Control Device for Grape Preservation) includes a gas sensor and a data processing module connected to the gas sensor. The gas sensor is located inside a detection chamber, and the inlet of the detection chamber is connected to a buffer chamber to slow down gas flow. A control module for controlling gas release is connected to the data processing module. When the detection device detects that the concentration of a target gas in the storage environment is lower than a set value, the control module adjusts and releases the target gas to achieve the pre-set optimal state. When the detection device detects that the concentration of the target gas in the storage environment exceeds the set value, the control module adjusts and releases other gases besides the target gas into the storage environment to reduce the concentration of the target gas. The buffer chamber makes the detection more stable and accurate, and ensures the service life of the gas sensor.

[0004] The aforementioned existing technology has the function of adjusting and detecting the concentration of the incoming gas. However, the incoming gas is generally at least one of oxygen, carbon dioxide, and nitrogen, and the required gas ratios vary. Without mixing the target gas before delivery, the output gas will have different gas ratios within the refrigerated container, affecting the preservation of the goods. Utility Model Content

[0005] The purpose of this invention is to provide a gas regulation device for a refrigerated container, in order to solve the problem mentioned in the background art that the output gas will have different gas ratios in the refrigerated container if the target gas is not mixed before delivery, thus affecting the preservation of goods.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas control device for a food storage container, comprising a mixing chamber, a fixed shelf fixed at the lower end of the mixing chamber, a fixed outer tube fixed between the fixed shelf and the upper wall of the mixing chamber, three spiral blades fixed in a ring array between the inner wall of the mixing chamber and the fixed outer tube, each spiral blade forming a spiral channel with the inner wall of the mixing chamber and the fixed outer tube being separated by two other spiral blades to form a first gas channel, a second gas channel and a third gas channel, each group of the first gas channel, the second gas channel and the third gas channel being connected, a first air inlet being provided in a ring array along the outermost upper end of the first gas channel on the side wall of the mixing chamber, a second air inlet and a third air inlet being provided along the lower end of the first air inlet on the side wall of the mixing chamber, the first air inlet, the second air inlet and the third air inlet being connected to the corresponding first gas channel, the second gas channel and the third gas channel respectively, and an air inlet pipe being installed on the outer end of the first air inlet, the second air inlet and the third air inlet.

[0007] Preferably, the fixed layer plate has a plurality of through holes arranged in a ring array, which connect the upper and lower ends of the mixing box. A central rotating tube is rotatably connected inside the mixing box. The upper end of the central rotating tube passes through the fixed layer plate and the fixed outer tube and is rotatably sealed to the upper wall of the mixing box. The lower end of the central rotating tube extends to the lower end of the mixing box and is rotatably sealed to the lower wall of the mixing box. The lower end of the central rotating tube is closed. A second rotating gear is fixed to the outside of the central rotating tube along the lower end of the mixing box. A drive motor is installed on one side of the lower end of the mixing box. A first rotating gear is installed on the output shaft end of the drive motor. The first rotating gear meshes with the second rotating gear. An air inlet groove is arranged in a ring array on the outer surface of the central rotating tube along the upper end of the lower wall of the mixing box. The air inlet groove connects the central rotating tube and the lower end of the mixing box. A third conveying pipe is fixed to the upper end of the mixing box.

[0008] Preferably, a first-stage rotating fan, a second-stage rotating fan, and a third-stage rotating fan are installed on the outside of the intermediate rotating tube between the fixed layer plate and the air inlet slot. The first-stage rotating fan, the second-stage rotating fan, and the third-stage rotating fan are arranged from top to bottom, and the size of the first-stage rotating fan, the second-stage rotating fan, and the third-stage rotating fan decreases step by step.

[0009] Preferably, each of the multiple air intake pipes in each layer is connected to an outer annular pipe, and a first delivery pipe is connected to one side of the outer annular pipe. The input end of the first delivery pipe is connected to the output end of the first air pump, and the input end of the first air pump is connected to the output end of the second delivery pipe.

[0010] Preferably, the output end of the third delivery pipe is connected to the input end of the second air pump, the output end of the second air pump is connected to the input end of the fourth delivery pipe, and the output end of the fourth delivery pipe is connected to a C-shaped distribution pipe, with the two output ends of the C-shaped distribution pipe extending outward.

[0011] Preferably, both ends of the C-shaped distribution pipe are integrally connected to an air supply shroud, and a honeycomb-shaped rectifier plate is fixed inside the air supply shroud.

[0012] Preferably, the mixing tank is fixed to a fixed bracket on the outside.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, in the mixing box, the first gas channel, the second gas channel and the third gas channel are formed by the separation of the spiral blades, so that different gases are initially transported in the gas channels, and the gases are mixed in the spiral transport by the connection of each group of the first gas channel, the second gas channel and the third gas channel. The spiral mixing method is conducive to improving the mixing uniformity and solves the problem that the output gas will have different gas ratios in the refrigerated container if the target gas is not mixed before transport, which will affect the preservation of goods.

[0015] (2) In this invention, during the rotation of the intermediate rotating tube, the first-stage rotating fan, the second-stage rotating fan, and the third-stage rotating fan generate strong airflow disturbances, which further promote gas mixing. This multi-stage mixing structure ensures that different gases are fully and uniformly mixed together, so that the proportion of gas output from different positions is basically the same, thus ensuring the preservation effect.

[0016] (3) In this invention, the mixed gas, under the action of the second suction pump, enters the refrigerated container through the fourth delivery pipe, the C-shaped distribution pipe, and the gas delivery hood. The honeycomb rectifier plate fixed inside the gas delivery hood has a unique honeycomb structure, which can uniformly rectify the gas. When the gas passes through the honeycomb rectifier plate, it is divided into countless tiny airflows, which are distributed throughout the refrigerated container with a stable and uniform flow rate and direction. Compared with traditional gas delivery methods, this effectively avoids the problem of uneven gas distribution within the refrigerated container, ensuring that all parts of the goods come into contact with the appropriate concentration of gas, thereby greatly improving the preservation effect and extending the shelf life of the goods. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a gas regulation device for a food preservation container according to the present invention from a frontal perspective.

[0018] Figure 2This is a schematic diagram of the overall structure of a gas regulation device for a food storage container from an upward perspective, according to the present invention.

[0019] Figure 3 This is a front view of a gas control device for a food storage container according to the present invention.

[0020] Figure 4 This is a top view of a gas regulation device for a food storage container according to the present invention.

[0021] Figure 5 This is a cross-sectional view at section AA of a gas control device for a food storage container according to this utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of a gas regulation device for a food storage container according to the present invention.

[0023] In the diagram: 1. Mixing box; 2. Fixed bracket; 3. Fixed shelf; 4. Through-hole slot; 5. Intermediate rotating pipe; 6. Drive motor; 7. First rotating gear; 8. Second rotating gear; 9. Air inlet slot; 10. First-stage rotating fan; 11. Second-stage rotating fan; 12. Third-stage rotating fan; 13. Fixed outer pipe; 14. Spiral blade; 15. First gas passage; 16. Second gas passage; 17. Third gas passage; 18. Air inlet pipe; 19. Outer annular pipe; 20. First delivery pipe; 21. First vacuum pump; 22. Second delivery pipe; 23. Third delivery pipe; 24. Second vacuum pump; 25. Fourth delivery pipe; 26. C-shaped distribution pipe; 27. Air supply hood; 28. Honeycomb rectifier plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-6 One embodiment provided by this utility model:

[0026] (1) Mixing box 1 and gas passage

[0027] This device is equipped with a mixing tank 1, and a fixed bracket 2 is fixed to the outside of the mixing tank 1, which provides stable support and fixation for the entire gas control device of the refrigerated container, ensuring that the device will not be affected by shaking during transportation.

[0028] A fixed layer plate 3 is fixed at the lower end of the interior of the mixing box 1. Multiple through holes 4 are arranged in a ring array on the fixed layer plate 3, and these through holes 4 connect the upper and lower ends of the interior of the mixing box 1.

[0029] A fixed outer tube 13 is fixed at the midpoint between the fixed layer 3 and the upper wall of the mixing chamber 1. Three spiral blades 14 are fixed in a ring array between the inner wall of the mixing chamber 1 and the fixed outer tube 13. Each spiral blade 14, the spiral channel formed by the inner wall of the mixing chamber 1 and the fixed outer tube 13 is separated by two other spiral blades 14 to form a first gas channel 15, a second gas channel 16 and a third gas channel 17. This is equivalent to a total of three sets of first gas channels 15, second gas channels 16 and third gas channels 17. The three sets of gas channels are arranged in a ring array, and each set of first gas channels 15, second gas channels 16 and third gas channels 17 is interconnected. A first air inlet is formed in a ring array along the outermost part of the uppermost gas channel 15 on the side wall of the mixing chamber 1. A second air inlet and a third air inlet are formed along the lower end of the first air inlet. These air inlets are connected to the corresponding first gas channel 15, second gas channel 16, and third gas channel 17, respectively. An air inlet pipe 18 is installed on the outside of the mixing chamber 1 along the outer ends of the first air inlet, second air inlet, and third air inlet. Multiple air inlet pipes 18 in each layer are connected to an outer ring pipe 19. A first delivery pipe 20 is connected to one side of the outer ring pipe 19. The input end of the first delivery pipe 20 is connected to the output end of the first vacuum pump 21, and the input end of the first vacuum pump 21 is connected to the output end of the second delivery pipe 22.

[0030] The other end of the second delivery pipe 22 is connected to an air bladder, and there is a control valve connecting the air bladder to the second delivery pipe 22. The three air bladders contain CO2, O2 and N2 respectively. Other gas air bladders can be set if needed, and the number of each related structure will increase accordingly.

[0031] CO2 is a bacteriostatic gas that inhibits bacterial growth and reproduction. Its bacteriostatic effect occurs in the lag phase of the bacterial growth curve. It has a bacteriostatic effect on most aerobic bacteria, but is ineffective against anaerobic bacteria and yeast.

[0032] O2: Inhibits the growth and reproduction of anaerobic bacteria, maintains the red color of fresh pork, beef and mutton, and maintains the aerobic respiration required for the metabolism of fresh fruits and vegetables.

[0033] N2: An inert gas that does not react with food and is used only as a filler gas in gas mixtures.

[0034] When using gas for preservation, the appropriate gas is selected based on the needs of the transported goods. For example, if CO2 gas is required, the control valve of the CO2 storage bladder is opened, and CO2 gas is extracted by the first suction pump 21. The gas then enters the corresponding first gas channel 15 through the first delivery pipe 20, the outer annular pipe 19, and the inlet pipe 18. If other gases, such as N2, are also required, the control valve of the N2 storage bladder is opened simultaneously, and the N2 gas enters the second gas channel 16 or the third gas channel 17 through the corresponding inlet pipe 18. Since the three gas channels are connected, the different gases begin to mix initially during the transport process.

[0035] By setting up three independent yet interconnected gas channels, various types of gases can be flexibly introduced and initially mixed according to the preservation needs of different goods, laying the foundation for more precise gas allocation and preservation effects in the future.

[0036] (2) Related structures of intermediate rotating tube 5

[0037] A central rotating tube 5 is rotatably connected inside the mixing chamber 1. The upper end of the central rotating tube 5 passes through the fixed layer plate 3 and the fixed outer tube 13 and is rotatably sealed to the upper wall of the mixing chamber 1. The lower end extends to the lower end of the mixing chamber 1 and is rotatably sealed to the lower wall of the mixing chamber 1, with the lower end of the central rotating tube 5 closed. A second rotating gear 8 is fixed to the outside of the central rotating tube 5 along the lower end of the mixing chamber 1. A drive motor 6 is installed on one side of the lower end of the mixing chamber 1. A first rotating gear 7 is installed on the output shaft end of the drive motor 6, and the first rotating gear 7 meshes with the second rotating gear 8. An air inlet groove 9 is arranged in a ring array on the outer surface of the central rotating tube 5 along the upper end of the lower wall of the mixing chamber 1. The air inlet groove 9 connects the central rotating tube 5 and the lower end of the mixing chamber 1. A third conveying pipe 23 is fixed to the upper end of the mixing chamber 1.

[0038] Driven by the drive motor 6, the first rotating gear 7 drives the second rotating gear 8 to rotate, thereby causing the intermediate rotating tube 5 to rotate. The gas that has undergone preliminary mixing enters the lower end of the mixing box 1 through the through hole groove 4, then enters the intermediate rotating tube 5 through the air inlet groove 9, and is then extracted by the second suction pump 24 through the third delivery pipe 23.

[0039] A first-stage rotating fan 10, a second-stage rotating fan 11, and a third-stage rotating fan 12 are installed on the outside of the intermediate rotating tube 5 between the fixed layer plate 3 and the air inlet slot 9. These three rotating fans are arranged from top to bottom, and their size decreases progressively. When the intermediate rotating tube 5 rotates under the drive of the drive motor 6, it drives the first-stage rotating fan 10, the second-stage rotating fan 11, and the third-stage rotating fan 12 to rotate together. During the rotation, the rotating fans of different sizes generate different intensities of stirring action on the gas entering the lower part of the mixing chamber 1. This provides finer and more thorough stirring according to the different positions and flow states of the gas inside the mixing chamber 1, allowing the various gases to be mixed more evenly and improving the quality of gas mixing.

[0040] (3) Subsequent transport and distribution structure

[0041] The output end of the third delivery pipe 23 is connected to the input end of the second air pump 24, the output end of the second air pump 24 is connected to the input end of the fourth delivery pipe 25, and the output end of the fourth delivery pipe 25 is connected to a C-shaped distribution pipe 26, with the two output ends of the C-shaped distribution pipe 26 extending outward.

[0042] The second suction pump 24 draws the thoroughly mixed gas from the third delivery pipe 23 and delivers it to the C-shaped distribution pipe 26 through the fourth delivery pipe 25. The C-shaped distribution pipe 26 evenly distributes the gas to the two output ends, preparing for subsequent gas delivery into the refrigerated container.

[0043] Both ends of the C-shaped distribution pipe 26 are integrally connected to an air supply hood 27, and a honeycomb rectifier plate 28 is fixed inside the air supply hood 27. The gas distributed by the C-shaped distribution pipe 26 enters the air supply hood 27. When passing through the honeycomb rectifier plate 28, the special structure of the honeycomb rectifier plate 28 enables the gas to be evenly distributed, and then enters the refrigerated container in a stable and uniform state.

[0044] The length and specific bending shape of each pipe are set according to the internal structure of the refrigerated container.

[0045] Working principle: During gas preservation, the corresponding airbag is opened according to the transportation requirements of the goods. Gas is extracted and output under the action of the first suction pump 21. Since the pipe diameter, pumping volume, and other data are consistent, the opening time of the control valve is set according to the target volume to control the gas discharge volume. The first suction pump 21 pumps out the corresponding gas, which enters the corresponding gas channel through the first delivery pipe 20, the outer annular pipe 19, and the inlet pipe 18. Since each set of first gas channels 15, second gas channels 16, and third gas channels 17 is connected, the gases are mixed during the transportation process.

[0046] Due to the suction action of the second suction pump 24, the incoming gas passes through the gas channel, then through the through-hole slot 4 on the fixed shelf 3, the lower end of the mixing box 1, the air inlet slot 9, the intermediate rotating pipe 5, and the third delivery pipe 23 before being pumped out. The first-stage rotating fan 10, the second-stage rotating fan 11, and the third-stage rotating fan 12 at the lower end of the mixing box 1 rotate under the drive of the drive motor 6, further aiding in gas mixing.

[0047] The gas is pumped into the refrigerated container through the fourth delivery pipe 25, the C-shaped distribution pipe 26 and the gas delivery hood 27. Since the honeycomb rectifier plate 28 is fixed inside the gas delivery hood 27, the mixed gas is evenly distributed by the honeycomb rectifier plate 28 and then input into the refrigerated container.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas regulation device for a food storage container, comprising a mixing tank (1), characterized in that: A fixed shelf (3) is fixed at the lower end of the mixing chamber (1). A fixed outer tube (13) is fixed between the fixed shelf (3) and the upper wall of the mixing chamber (1). Three spiral blades (14) are fixed in a ring array between the inner wall of the mixing chamber (1) and the fixed outer tube (13). The spiral channel formed by each spiral blade (14), the inner wall of the mixing chamber (1), and the fixed outer tube (13) is separated by two other spiral blades (14) to form a first gas channel (15), a second gas channel (16), and a third gas channel (17). Each group of first gas channels (15), the second gas channel (16) and the third gas channel (17) are connected. The side wall of the mixing box (1) is provided with a first air inlet in a ring array along the outermost end of the first gas channel (15). The side wall of the mixing box (1) is provided with a second air inlet and a third air inlet along the lower end of the first air inlet. The first air inlet, the second air inlet and the third air inlet are respectively connected to the corresponding first gas channel (15), the second gas channel (16) and the third gas channel (17). An air inlet pipe (18) is installed on the outside of the mixing box (1) along the outer ends of the first air inlet, the second air inlet and the third air inlet.

2. The gas regulation device for a refrigerated container according to claim 1, characterized in that: The fixed layer plate (3) has a ring array of multiple through holes (4) that connect the upper and lower ends of the mixing box (1). A central rotating tube (5) is rotatably connected inside the mixing box (1). The upper end of the central rotating tube (5) passes through the fixed layer plate (3) and the fixed outer tube (13) and is rotatably sealed to the upper wall of the mixing box (1). The lower end of the central rotating tube (5) extends to the lower end of the mixing box (1) and is rotatably sealed to the lower wall of the mixing box (1). The lower end of the central rotating tube (5) is closed. The outer side of the central rotating tube (5) extends along the mixing box. A second rotating gear (8) is fixed at the lower end of the mixing box (1). A drive motor (6) is installed on one side of the lower end of the mixing box (1). A first rotating gear (7) is installed at the output shaft end of the drive motor (6). The first rotating gear (7) meshes with the second rotating gear (8). An air inlet groove (9) is formed in an annular array on the outer surface of the intermediate rotating tube (5) along the upper end of the lower wall of the mixing box (1). The air inlet groove (9) connects the intermediate rotating tube (5) and the lower end of the mixing box (1). A third conveying pipe (23) is fixed at the upper end of the mixing box (1).

3. The gas regulation device for a refrigerated container according to claim 2, characterized in that: The intermediate rotating tube (5) is equipped with a first-stage rotating fan (10), a second-stage rotating fan (11) and a third-stage rotating fan (12) along the fixed layer plate (3) and the air inlet groove (9). The first-stage rotating fan (10), the second-stage rotating fan (11) and the third-stage rotating fan (12) are arranged from top to bottom, and the size of the first-stage rotating fan (10), the second-stage rotating fan (11) and the third-stage rotating fan (12) decreases step by step.

4. The gas regulation device for a refrigerated container according to claim 1, characterized in that: Each layer of multiple air inlet pipes (18) is connected to an outer annular pipe (19) on the outside. One side of the outer annular pipe (19) is connected to a first delivery pipe (20). The input end of the first delivery pipe (20) is connected to the output end of the first air pump (21). The input end of the first air pump (21) is connected to the output end of the second delivery pipe (22).

5. A gas regulation device for a refrigerated container according to claim 2, characterized in that: The output end of the third delivery pipe (23) is connected to the input end of the second air pump (24), the output end of the second air pump (24) is connected to the input end of the fourth delivery pipe (25), the output end of the fourth delivery pipe (25) is connected to a C-shaped distribution pipe (26), and the two output ends of the C-shaped distribution pipe (26) extend outward.

6. A gas regulation device for a refrigerated container according to claim 5, characterized in that: Both ends of the C-shaped distribution pipe (26) are integrally connected to an air supply hood (27), and a honeycomb rectifier plate (28) is fixed inside the air supply hood (27).

7. A gas regulation device for a refrigerated container according to claim 1, characterized in that: The mixing box (1) is fixed to the outside of a fixed bracket (2).

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