Charging device, charging system and charging method, mobile cold storage

Abstract

The application relates to a refrigeration filling device, a refrigeration filling system and a refrigeration filling method, and a mobile cold storage, the refrigeration filling device comprising a main pipe provided with a refrigerant channel, the refrigerant channel being communicated with an external cold source; branch pipes arranged on the main pipe and spaced along the axial direction of the main pipe, one end of each branch pipe being communicated with the refrigerant channel; a refrigeration filling plate detachably connected with the branch pipes, the refrigeration filling plate being provided with water injection holes at intervals, any water injection hole being plugged with any branch pipe for forming an ice column; and a heat preservation box, the refrigeration filling plate being detachably mounted on the heat preservation box. Water in the water injection holes of the refrigeration filling plate is rapidly frozen through the branch pipes, refrigeration filling time is saved, refrigeration filling efficiency is improved, and the preservation time can be greatly prolonged.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigeration charging device, refrigeration charging system and refrigeration charging method, and a mobile cold storage. Background Technology

[0002] As people's living standards improve, consumers want to enjoy fresh fruits and vegetables from different regions, while fruit farmers desire a longer-lasting preservation method to extend the shelf life of their produce. Conventional preservation involves shipping fruits and vegetables, along with ice packs, in cardboard boxes after harvesting. The freshness of these fruits and vegetables is then limited by the speed of logistics. If the delivery time exceeds one day, the fruits and vegetables are prone to browning, water loss, and a decline in freshness. Furthermore, irregularly shaped ice packs can cause problems: too few packs result in poor insulation, while too many packs can compress the produce, damaging its quality. Using conventional cold storage plates or ice boxes for preservation presents issues such as slow cooling or the large space required for cooling.

[0003] In addition, some fruits and vegetables (such as lychees) have a period of time between being picked from the tree and being centrally pruned and packaged. This period is also critical. The optimal preservation temperature for many varieties of lychees is 3-5℃. They should not be too humid. However, lychees have a high respiration heat. During the period after picking, they are prone to browning due to the respiration heat of the fruits and vegetables themselves, which accelerates the decline in freshness. Summary of the Invention

[0004] This application provides a cooling device, a cooling system and a cooling method, and a mobile cold storage to solve the technical problems of slow cooling speed when using ice packs to compress fruits and vegetables, which can damage the quality of fruits and vegetables, and when using cold storage plates or ice boxes for preservation.

[0005] In a first aspect, this application provides a cooling device, comprising: a main pipe having a refrigerant channel connected to an external cold source; branch pipes disposed on the main pipe and spaced apart along the axial direction of the main pipe, one end of the branch pipe being connected to the refrigerant channel; a cooling plate detachably connected to the branch pipes, the cooling plate having spaced water injection holes, any water injection hole being inserted into any branch pipe for forming ice pillars; and an insulation box, the cooling plate being detachably installed on the insulation box.

[0006] In some possible implementations, m rows of cooling plates are arranged along the axis of the main pipe and n columns of cooling plates are arranged along the axis of the branch pipe, with the axes of the main pipe and the branch pipe intersecting; where m≥2 and n≥2.

[0007] In some possible implementations, a connecting plate is provided on the side of the cooling plate away from the main pipe, and the connecting plate is provided with a first through hole communicating with the water injection hole, the diameter of the first through hole being smaller than the diameter of the water injection hole.

[0008] In some possible implementations, a heating element is provided between two adjacent cooling plates located axially along the branch pipe, and the heating element has a second through hole to facilitate the passage of the branch pipe.

[0009] In some possible implementations, the cold plate has seals on both sides, which cover both ends of the water injection hole.

[0010] In some possible implementations, the diameter of the water injection hole is 15mm-35mm.

[0011] In some possible implementations, the insulated box includes a base, side panels, and a top cover, with the top cover foldably connected to the side panels and the side panels foldably connected to the base; any one of the base, side panels, and top cover is detachably connected to a cooling plate.

[0012] In some possible implementations, a first pivot is provided around the base, and the side plates are rotatably connected to the base through the first pivot; a first slot is provided on both sides of one of the side plates, and a buckle is provided on both sides of the other side plate adjacent to the first slot to engage with the first slot.

[0013] In some possible implementations, a second pivot is provided on the side of the side plate facing away from the base, and the top cover is rotatably connected to the side plate via the second pivot; the other side plate adjacent to this side plate has a snap-fit ​​protrusion on the side facing away from the base, and the top cover has a second slot on the side facing the base that snaps into the snap-fit ​​protrusion.

[0014] In some possible implementations, the base, side plate, and top cover may have a groove for fitting the cooling plate.

[0015] Secondly, this application provides a cooling system, including an external cold source and a cooling device as described above.

[0016] In some possible implementations, the external cold source includes a compressor, an outdoor heat exchanger, a throttling element, an indoor heat exchanger, and a charging device as described above. The third refrigerant inlet of the outdoor heat exchanger is connected to the compressor's exhaust port via a first pipeline, and the third refrigerant outlet of the outdoor heat exchanger is connected to the throttling element. The second refrigerant inlet of the indoor heat exchanger is connected to the throttling element via a second pipeline, and the second refrigerant outlet of the indoor heat exchanger is connected to the compressor's air inlet via a third pipeline. The main refrigerant passage has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the second pipeline via a fourth pipeline, and the first refrigerant outlet is connected to the third pipeline. A charging valve is provided on the fourth pipeline.

[0017] In some possible implementations, a fifth pipeline is provided between the first and fourth pipelines, and a heating bypass valve is provided on the fifth pipeline.

[0018] In some possible implementations, a check valve is provided on the fourth pipeline, and one end of the fifth pipeline is connected to the first pipeline, while the other end is connected to the outlet of the check valve.

[0019] Thirdly, this application provides a method for charging the cooling system as described above, comprising: inserting a branch pipe into the water injection hole of the cooling plate and injecting water into the water injection hole of the cooling plate; operating an external cold source and using the low-temperature heat conduction of the branch pipe to make ice on the cooling plate; after the ice is made, removing the cooling plate and placing the cooling plate into an insulated box.

[0020] Fourthly, this application provides a mobile cold storage facility, comprising: a vehicle body; and a cooling system as described above, the cooling system being disposed on the vehicle body.

[0021] In some possible implementations, an air supply duct is provided at the air outlet of the indoor heat exchanger of the cooling system, with the air outlet of the air supply duct facing the insulation box. A differential pressure pre-cooling fan is provided inside the vehicle body, and a return air outlet connected to the air outlet of the indoor heat exchanger is provided inside the vehicle body to form a differential pressure pre-cooling cycle.

[0022] The technical solutions provided in this application have the following advantages compared with the prior art:

[0023] This application provides a cooling device, cooling system, cooling method, and mobile cold storage. The cooling device involves installing a cooling plate onto a branch pipe, filling the water inlet with water, and allowing low-temperature refrigerant to flow into the refrigerant channel. Through heat conduction, the temperature of the branch pipe reaches -5°C to -10°C, rapidly freezing the water in the water inlet of the cooling plate into ice columns. A very small amount of low-temperature refrigerant flows into the branch pipe from the refrigerant channel, causing the branch pipe temperature to drop rapidly, enabling even faster ice formation. The cooling plate is installed on an insulated box, and the ice columns from the cooling plate maintain the internal temperature of the insulated box at 3°C ​​to 5°C. This allows for the preservation of fruits and vegetables during harvesting, while simultaneously suppressing their respiration heat and ensuring freshness. After harvesting, the cooling plate can be removed for re-cooling or replaced with a new one, thus maintaining a near-constant temperature of 3°C to 5°C within the insulated box, significantly extending the preservation time. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0027] Figure 1 This is a schematic diagram of the structure of a cooling device provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 A schematic cross-sectional view of the cooling plate in the cooling device is shown.

[0029] Figure 3 for Figure 1 A schematic diagram of the explosion of the cooling device is shown.

[0030] Figure 4 for Figure 1 The diagram shows the structure of the insulation box in the cooling device (with the top cover in the closed state);

[0031] Figure 5 for Figure 4 A cross-sectional schematic diagram of the insulated box is shown;

[0032] Figure 6 for Figure 4 The diagram shows the insulated box in its unfolded state (with the top cover in the open position);

[0033] Figure 7 for Figure 4 The diagram shows the insulated box in its flattened state (with the top cover and side panels both open);

[0034] Figure 8 for Figure 4 The diagram shows the usage status of the insulated box (a transport frame is placed on the base, and the arrow indicates the direction of the differential pressure pre-cooling cold air).

[0035] Figure 9 A structural block diagram of a cooling system provided in an embodiment of this application (where the arrows indicate the direction of refrigerant flow);

[0036] Figure 10 A flowchart of a cooling method provided in an embodiment of this application;

[0037] Figure 11 This is a schematic diagram of the structure of a mobile cold storage provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Cooling device; 11. Main pipe; 111. Refrigerant channel; 12. Branch pipe; 13. Cooling plate; 131. Water injection hole; 132. Connecting plate; 133. First through hole; 14. Insulation box; 141. Base; 1411. First rotating shaft; 142. Side plate; 1421. First slot; 1422. Buckle; 1423. Second rotating shaft; 1424. Snap-fit ​​protrusion; 1425. Groove; 143. Top cover; 1431. Second slot; 15. Heating element; 151. Second through hole; 16. Sealing element;

[0040] 2. Cooling system; 21. Compressor; 22. Outdoor heat exchanger; 23. Throttling element; 24. Indoor heat exchanger; 25. Cooling valve; 26. Heating bypass valve; 27. Check valve; 201. First pipeline; 202. Second pipeline; 203. Third pipeline; 204. Fourth pipeline; 205. Fifth pipeline;

[0041] 3. Mobile cold storage; 31. Vehicle body; 32. Air supply duct; 33. Differential pressure pre-cooling fan; 34. Return air outlet; 35. Pre-cooling water tank; 36. Water inlet pipe; 37. Partition. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0045] To address the issues of ice packs causing damage to fruit and vegetable quality due to compression, and the slow cooling speed of cold storage plates or ice boxes used for preservation, this application provides a cooling device, cooling system, cooling method, and mobile cold storage, which can quickly cool, save cooling time, improve cooling efficiency, and greatly extend the preservation time.

[0046] Figure 1 This is a schematic diagram of a cooling device provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows a cross-sectional view of the cooling plate in the cooling device. Figure 3 for Figure 1 A schematic diagram of the explosion of the cooling device is shown.

[0047] Figures 1 to 8 A cooling device 1 provided in this application embodiment includes a main pipe 11, branch pipes 12, a cooling plate 13, and an insulation box 14. Figures 4 to 8 As shown in the figure, the main pipe 11 is provided with a refrigerant channel 111, which is connected to an external cold source for providing cooling capacity to the refrigerant channel 111. Branch pipes 12 are provided on the main pipe 11 and are distributed at intervals along the axial direction of the main pipe 11, with one end of the branch pipe 12 connected to the refrigerant channel 111.

[0048] Specifically, an external cold source can supply low-temperature air, low-temperature refrigerant, and other low-temperature refrigerants to the refrigerant channel 111, thereby reducing the temperature of the main pipe 11 and subsequently reducing the temperature of the branch pipe 12 through heat conduction.

[0049] The cooling plate 13 is detachably connected to the branch pipe 12. The cooling plate 13 is provided with water injection holes 131 at intervals. Any water injection hole 131 is inserted and matched with any branch pipe 12 to make ice pillars. The cooling plate 13 is detachably installed on the insulated box 14.

[0050] Specifically, the cross-section of the water injection hole 131 can be set to a circular, rectangular, rhomboid, trapezoidal, hexagonal, or other shapes, without any specific limitation. Those skilled in the art can set it according to actual needs. The diameter of the water injection hole 131 is larger than the outer diameter of the branch pipe 12, so that after the branch pipe 12 is inserted into the water injection hole 131, there is a gap between the branch pipe 12 and the water injection hole 131 to facilitate water injection for ice making.

[0051] Understandably, the cooling plate 13 is installed on the branch pipe 12, and water is filled into the water inlet 131. Low-temperature refrigerant flows through the refrigerant channel 111, and through heat conduction, the temperature of the branch pipe 12 reaches -5℃ to -10℃ (it can also be adjusted lower; the lower the temperature, the faster the cooling speed). This allows for rapid ice formation of the water in the water inlet 131 of the cooling plate 13, creating ice columns. A very small amount of low-temperature refrigerant flows from the refrigerant channel 111 into the branch pipe 12 to complete circulation, causing the temperature of the branch pipe 12 to drop rapidly, enabling even faster ice formation. The cooling plate 13 is then installed on the insulation box 14. The ice columns from the cooling plate 13 maintain the temperature inside the insulation box 14 at 3℃ to 5℃, allowing for the preservation of fruits and vegetables during harvesting while suppressing their own respiratory heat, thus ensuring their freshness. After the fruits and vegetables are harvested, the cooling plate 13 can be removed for re-cooling or replaced with a new one, thus ensuring that the temperature of the fruits and vegetables in the insulated box 14 remains close to a constant 3℃~5℃, which can greatly extend the preservation time. Compared with the traditional method of using ice packs for preservation, this method avoids the use of ice packs that compress space or damage fruits and vegetables; traditional cooling plates or ice boxes require a special low-temperature cold storage for freezing, which takes a long time, and air freezing takes more than 4 hours. However, the cooling plate 13 provided in this application can be installed on the branch pipe 12 for 1 minute, and the cooling process takes 4~6 minutes. It can also be installed on the insulated box for 1 minute, making the cooling and preservation process quick and simple.

[0052] In some embodiments, multiple cooling plates 13 may be installed on the branch pipe 12. m rows of cooling plates 13 are arranged along the axial direction of the main pipe 11, and n columns of cooling plates 13 are arranged along the axial direction of the branch pipe 12. The axial directions of the main pipe 11 and the branch pipe 12 intersect. Where m ≥ 2 and n ≥ 2. Figure 1 As shown, two rows and two columns of cooling plates 13 are installed on the branch pipe 12.

[0053] Specifically, by setting multiple cooling plates 13 on the branch pipe 12, multiple cooling plates 13 can be rapidly cooled at the same time. After the ice-making is completed, the cooling plates 13 are put into the insulation box 14, which can save cooling time and improve cooling efficiency.

[0054] In some embodiments, such as Figure 2 As shown, a connecting plate 132 is provided on the side of the cooling plate 13 away from the main pipe. The connecting plate 132 has a first through hole 133 communicating with the water injection hole 131. The diameter of the first through hole 133 is smaller than the diameter of the water injection hole 131, and the first through hole 133 allows the branch pipe 12 to pass through. Specifically, the shape of the first through hole 133 can be set to a circle, square, hexagon, etc., and no specific limitation is made here.

[0055] When multiple rows of cooling plates 13 are installed, water is injected starting from the water inlet 131 of the top row of cooling plates 13. The water flows through the second through hole 151 to the water inlet 131 of the lower cooling plates 13, filling them completely. Then, the water inlet 131 of the upper row of cooling plates 13 are filled. Next, the branch pipe 12 of the cooling inlet / outlet pipe is inserted to begin the cooling process. The water in the water inlet 131 forms ice columns. The entire cooling and ice-making process takes only 4 to 6 minutes, resulting in a fast cooling speed. By installing the connecting plate 132, the contact between the ice columns and the outside environment can be reduced, thus keeping the ice columns warm.

[0056] Optionally, the cold-filled plate 13 is made of expanded polypropylene (EPP) foam material. EPP material has good thermal stability, excellent shock resistance, impact strength and toughness, and a certain degree of elasticity. It is an ideal material for high-quality insulation boxes 14, which makes the cold-filled plate 13 have excellent thermal insulation performance.

[0057] In some embodiments, such as Figure 3 As shown, a heating element 15 is provided between two adjacent cooling plates 13 located along the axial direction of the branch pipe 12. The heating element 15 has second through holes 151 spaced apart to facilitate the passage of the branch pipe 12. Specifically, the shape of the second through hole 151 can be set to a circle, square, hexagon, etc., and no specific limitation is made here.

[0058] When multiple rows of cold-filled plates 13 are provided, after ice making, two adjacent cold-filled plates 13 located on the axial direction of the branch pipe 12 will solidify together due to the formation of a thin ice layer between them, making it difficult to separate them. Therefore, a heating element 15 is provided between the two adjacent cold-filled plates 13. The heat from the heating element 15 is used to quickly melt the thin ice layer between the upper and lower adjacent cold-filled plates 13, so that the two adjacent cold-filled plates 13 can be quickly separated after ice making.

[0059] In some embodiments, such as Figure 3 As shown, sealing elements 16 are provided on both sides of the cooling plate 13, and the sealing elements 16 cover both ends of the water injection hole 131.

[0060] Specifically, the sealing element 16 can be a sealing sleeve made of an elastic material (such as silicone). The sealing sleeve has raised edges around its perimeter to form a sealing convex edge, which engages with the cold filling plate 13. Because the sealing element 16 has a certain degree of elasticity, it can be easily fitted onto the cold filling plate 13. By setting the sealing element 16, the water injection hole 131 of the cold filling plate 13 can be sealed to prevent water leakage after the ice melts. After harvesting, the cold filling plate 13 can be removed from the insulation box 14. The sealing elements 16 on both sides of the cold filling plate 13 can be removed, while the sealing element 16 at the bottom of the lower row of cold filling plates 13 can be retained. After cold filling is completed, the sealing element 16 is fitted onto the cold filling plate 13, and then the cold filling plate 13 with the sealing element 16 is placed back into the insulation box 14.

[0061] Furthermore, the diameter of the water injection hole 131 is 15mm-35mm.

[0062] Specifically, the diameter of the water injection hole 131 can be set to 17mm, 20mm, 22mm, 25mm, 30mm, etc. A larger diameter of the water injection hole 131 results in a slower cooling rate but a longer heat retention time; conversely, a smaller diameter results in a faster cooling rate but a shorter heat retention time. In a preferred embodiment, the diameter of the water injection hole 131 can be set to 17mm, which allows for rapid freezing while maintaining sufficient heat retention time.

[0063] Figure 4 for Figure 1 The diagram shown illustrates the structure of the insulation box in the cooling device (with the top cover closed). Figure 5 for Figure 4 The diagram shown is a cross-sectional view of the insulated box. Figure 6 for Figure 4 The diagram shown illustrates the insulated box in its unfolded state (with the top cover open). Figure 7 for Figure 4 The diagram shown illustrates the insulated box in its flattened state (with the top cover and side panels both open). Figure 8 for Figure 4 The diagram shows the usage status of the insulated box (a transport frame is placed on the base, and the arrow indicates the direction of the differential pressure pre-cooling cold air).

[0064] In some embodiments, such as Figure 4 and Figure 5 As shown, the insulated box 14 includes a base 141, a side plate 142 and a top cover 143. The top cover 143 is foldably connected to the side plate 142, and the side plate 142 is foldably connected to the base 141. A cooling plate 13 is detachably connected to any one of the base 141, the side plate 142 and the top cover 143.

[0065] It should be noted that cooling plates 13 can be installed on the base 141, side panels 142, and top cover 143 to extend the heat preservation time. Those skilled in the art can choose according to specific preservation time requirements. For fruits and vegetables with low respiratory heat and for short-distance logistics, only the cooling plate 13 needs to be installed on the side panel 142. For fruits and vegetables with high respiratory heat and for long-distance logistics, the cooling plates 13 can be installed on the base 141, side panels 142, and top cover 143 to extend the preservation time.

[0066] In some embodiments, such as Figure 7 As shown, a first pivot 1411 is provided around the base 141, and a side plate 142 is rotatably connected to the base 141 via the first pivot 1411. One side plate 142 has a first slot 1421 on each side, and the other side plate 142 adjacent to the first side plate 142 has a buckle 1422 on each side that engages with the first slot 1421.

[0067] The first slot 1421 can be square, trapezoidal, arc-shaped, or other shapes. Preferably, the first slot 1421 is trapezoidal, and the cross-section of the buckle 1422 is correspondingly trapezoidal. Through the snap-fit ​​connection between the first slot 1421 and the buckle 1422, the side plate 142 can rotate around the pivot, thereby allowing the side plate 142 to be in an open, flat state or a closed, upright state relative to the base 141.

[0068] It should be noted that the base 141 can generally be set as a square or a rectangle. The base 141 can be set as a rectangle, making the food storage container a cuboid. For ease of explanation and understanding, the side panel 142 located on the long side of the base 141 is called the "long side panel," and the side panel 142 located on the short side of the base 141 is called the "short side panel." For example... Figure 7 As shown, first, one of the long side panels is erected and connected to the two adjacent short side panels. Then, the other long side panel is erected and connected to the short side panels. This will quickly complete the installation of the insulation box 14.

[0069] Optionally, such as Figure 6 As shown, a second pivot 1423 is provided on the side of the side plate 142 facing away from the base 141, and the top cover 143 is rotatably connected to the side plate 142 via the second pivot 1423. It is worth noting that one or two top covers 143 can be provided. When two top covers 143 are provided, it is preferable that both top covers 143 are provided on the longer side plate. The figure shows the state with two top covers 143. A snap-fit ​​protrusion 1424 is provided on the side of the shorter side plate facing away from the base 141, and a second slot 1431 is provided on the side of the top cover 143 facing the base 141, which snaps into the snap-fit ​​protrusion 1424.

[0070] The top cover 143 can rotate around the second pivot 1423 to achieve an open or closed state. When it needs to be closed, the top cover 143 and the side panel 142 can be connected by the snap-fit ​​protrusion 1424 to the second snap-fit ​​groove 1431, which can improve the sealing of the top cover 143 and the side panel 142, prevent cold air from leaking out of the insulated box 14, and thus improve the preservation time of the insulated box 14.

[0071] In some embodiments, such as Figure 7 As shown, any one of the base 141, side plate 142 and top cover 143 is provided with a groove 1425 for fitting the cooling plate 13.

[0072] Optionally, the insulated box 14 is made of expanded polypropylene (EPP) foam material, which has a certain degree of elasticity. By embedding and installing the cooling plate 13 in the groove 1425, the temperature inside the insulated box 14 is reduced to 3℃~5℃, thereby preserving the freshness of fruits and vegetables.

[0073] It should be noted that the insulated box 14 can be designed as a cuboid, in which case the cooling plates 13 installed in the side panels 142 have two specifications. Accordingly, the grooves 1425 can be set according to the specific preservation time requirements. For fruits and vegetables with low respiratory heat and for short-distance logistics, only the cooling plates 13 need to be installed on the side panels 142. For fruits and vegetables with high respiratory heat and for long-distance logistics, the cooling plates 13 can be installed on the base 141, side panels 142 and top cover 143 to extend the preservation time.

[0074] like Figure 8 As shown, the cooled plate 13 is installed on the insulated box 14 after being cooled, and a perforated transport frame is placed on the base 141, which allows for simultaneous harvesting and preservation of fruits and vegetables. After harvesting, the side plates 142 can be erected one by one, and the top cover 143 can be placed on the side plates 142 to preserve the fruits and vegetables for a long time.

[0075] Figure 9 This is a structural block diagram of a cooling system provided in an embodiment of this application (where the arrows indicate the direction of refrigerant flow).

[0076] According to the embodiments of this application, such as Figure 9 As shown, a cooling system 2 is also provided, including an external cold source and a cooling device 1 as described above. The specific working principle and process of this embodiment are detailed in the description of the cooling device 1 embodiment above, and will not be repeated here.

[0077] In some embodiments, the external cold source includes a compressor 21, an outdoor heat exchanger 22, a throttling element 23, an indoor heat exchanger 24, and a charging device 1 as described above. The third refrigerant inlet of the outdoor heat exchanger 22 is connected to the exhaust port of the compressor 21 via a first pipe 201, and the third refrigerant outlet of the outdoor heat exchanger 22 is connected to the throttling element 23. The second refrigerant inlet of the indoor heat exchanger 24 is connected to the throttling element 23 via a second pipe 202, and the second refrigerant outlet of the indoor heat exchanger 24 is connected to the intake port of the compressor 21 via a third pipe 203. The refrigerant passage 111 of the main pipe 11 has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet of the main pipe 11 is connected to the second pipe 202 via a fourth pipe 204, and the first refrigerant outlet of the main pipe 11 is connected to the third pipe 203. A charging valve 25 is provided on the fourth pipe 204.

[0078] When the cooling system 2 is in normal cooling mode, the cooling valve 25 is closed, the throttling element 23 is open, the outdoor heat exchanger 22 is equivalent to the condenser, and the indoor heat exchanger 24 is equivalent to the evaporator. At this time, the indoor heat exchanger 24 is cooling, the main pipe 11 is not cooling, and the compressor 21, the outdoor heat exchanger 22, the throttling element 23 and the indoor heat exchanger 24 form the main loop of the refrigeration cycle. When cooling is required, both the throttling element 23 and the cooling valve 25 are opened. The compressor 21, outdoor heat exchanger 22, throttling element 23, cooling valve 25, and main pipe 11 form a refrigeration cycle branch. The main pipe 11 refrigerates, and the cooling valve 25 regulates the evaporation pressure and temperature of the main pipe 11, causing a sudden drop in the pressure of the flowing refrigerant. At the same time, some of the liquid refrigerant vaporizes, absorbing latent heat, making the throttled refrigerant a low-pressure, low-temperature state, allowing the main pipe 11 to reach a lower temperature (e.g., -5℃ to -15℃) to cool the cooling plate 13. Simultaneously, the evaporation pressure and temperature of the indoor heat exchanger 24 are regulated by the throttling element 23, and the evaporation temperature of the indoor heat exchanger 24 is -2℃ to -5℃, so that the temperature inside the cold storage reaches 3 to 5℃. When cooling is complete, the throttling element 23 closes first, stopping the cooling.

[0079] In some embodiments, a fifth pipe 205 is provided between the first pipe 201 and the fourth pipe 204, and a heating bypass valve 26 is provided on the fifth pipe 205. When the cooling is completed, the throttling element 23 is closed first, and the heating bypass valve 26 led from the exhaust side of the compressor 21 is opened. At the same time, the cooling valve 25 is fully opened (for a short time), and the hot gas flows quickly through the branch pipe 12, causing the ice frozen around the branch pipe 12 to melt. At the same time, the heating element 15 is put into heating, causing the thin ice layer between the upper and lower rows of cooling plates 13 to melt, and the cooling plates 13 can be quickly detached or pulled out.

[0080] In some embodiments, a one-way valve 27 is provided on the fourth pipe 204, and one end of the fifth pipe 205 is connected to the first pipe 201, and the other end is connected to the outlet of the one-way valve 27. By providing the one-way valve 27, heat drawn from the exhaust side of the compressor 21 can be prevented from entering the main circuit of the refrigeration cycle and affecting the cooling capacity of the refrigerant in the indoor heat exchanger 24, thereby ensuring that the temperature inside the mobile cold storage 3 is maintained at 3-5℃.

[0081] Figure 10 This is a flowchart of a cooling method provided in an embodiment of this application.

[0082] According to the embodiments of this application, such as Figure 10 As shown, this application also provides a method for charging the cooling system 2 as described above, comprising the following steps:

[0083] S1. Insert the branch pipe 12 into the water injection hole 131 of the cooling plate 13 and inject water into the water injection hole 131 of the cooling plate 13.

[0084] S2. Operate an external cold source and use the low-temperature heat conduction of the branch pipe 12 to make ice on the cold plate 13.

[0085] Furthermore, the charging valve 25 is opened, and the refrigerant flows through the refrigeration cycle branch. The charging valve 25 adjusts the evaporation pressure and temperature of the main pipe 11 so that the main pipe 11 reaches a lower temperature. The low-temperature heat conduction of the branch pipe 12 is used to make ice on the charging plate 13.

[0086] S3. After ice making is completed, remove the cooling plate 13 and put the cooling plate 13 into the insulation box 14.

[0087] Furthermore, the cooling system 2 also includes a fifth pipeline 205, which is located between the first pipeline 201 and the fourth pipeline 204, and a heating bypass valve 26 is provided on the fifth pipeline 205.

[0088] Step S3 further includes: after ice making is completed, closing the throttling element 23 to stop refrigeration, opening the heating bypass valve 26, and heating element 15 can be turned on to heat at the same time. At the same time, the cold charging valve 25 is fully opened, and the hot gas on the exhaust side of the compressor 21 flows quickly through the branch pipe 12. The cold charging plate 13 is removed and installed in the insulation box 14.

[0089] Figure 11 This is a schematic diagram of the structure of a mobile cold storage provided in an embodiment of this application.

[0090] According to the embodiments of this application, such as Figure 11 As shown, this application also provides a mobile cold storage 3, including a movable vehicle body 31 and a cooling system 2 as described above, the cooling system 2 being disposed on the vehicle body 31.

[0091] Mobile cold storage units 3 are placed in different regions (e.g., between different cities and counties). Before the harvest of fruits and vegetables (such as lychees), the cooling plates 13 are pre-cooled using the cooling device 1 and placed into insulated boxes 14. These boxes are then transported to the fruit and vegetable growing areas, where the harvested fruits and vegetables are placed directly into the insulated boxes 14 for rapid cooling. After harvesting, the insulated boxes 14 are transferred to the mobile cold storage units 3 (the harvesting process takes 2 hours). Inside the mobile cold storage units 3, the insulated boxes 14 are unfolded, and the cooling plates 13 are re-cooled or replaced. Simultaneously, the fruits and vegetables are pruned and pre-cooled by pressure differential. After completion, new cooling plates 13 are installed, and the fruits and vegetables are loaded onto trucks for further transport. If the transport time exceeds one day, the fruits and vegetables can be quickly re-cooled in cold storage units set up in different cities and counties (ordinary cold storage temperatures are 3 to -5℃; above 0℃, ice packs or ice boxes cannot be made). After re-cooling, the fruits and vegetables are transported again. This ensures that the temperature of fruits and vegetables such as lychees remains close to a constant 3 to 5℃, greatly extending the shelf life and achieving end-to-end preservation.

[0092] Optionally, the mobile cold storage 3 is equipped with a precooling water tank 35 and a water inlet pipe 36 connected thereto. The precooling water tank 35 can store a large amount of water. When it is necessary to replenish water to the cooling device 1, water can be injected into the water injection hole 131 of the main pipe 11 through the water inlet pipe 36.

[0093] In some embodiments, the indoor heat exchanger 24 may be equipped with an angle-type air cooler, and the air outlet of the indoor heat exchanger 24 of the cooling system 2 is provided with an air supply pipe 32, the air outlet of the air supply pipe 32 facing the insulation box 14, the vehicle body 31 is provided with a differential pressure pre-cooling fan 33, and the vehicle body 31 is provided with a return air outlet 34 that communicates with the air outlet of the indoor heat exchanger 24 to form a differential pressure pre-cooling cycle.

[0094] Optionally, the air supply duct 32 can be a fabric duct, which is a flexible air distribution system made of special fibers. It mainly relies on the unique air outlet mode of fiber penetration and nozzle jet to achieve uniform permeable air supply.

[0095] The differential pressure pre-cooling fan 33 is activated to create a static pressure difference across the insulation box 14. The static pressure is controlled by adjusting the frequency of the differential pressure pre-cooling fan 33. Then, the cooling fan is activated, and cold air is evenly distributed and permeates through the air supply duct 32. Under the action of the pressure difference, the cold air flows through the insulation box 14 and directly contacts the fruits and vegetables for heat exchange. The cold air flows out from the other side of the insulation box 14 (from the return air vent 34) and re-enters the cooling fan to form a circulation, thus achieving differential pressure pre-cooling of the fruits and vegetables.

[0096] Optionally, a partition 37 can be provided inside the vehicle body 31 to form a cooling zone, and the cooling device 1 is placed in the cooling zone for cooling.

[0097] During the cooling process of the cooling plate 13, the insulated box 14 can be unfolded and placed inside the vehicle body 31 of the mobile cold storage 3, with a perforated transport frame (such as...) placed on the base 141. Figure 8(As shown). After the fruits and vegetables (such as lychees) are placed inside, the refrigeration equipment of the mobile cold storage 3 is activated, the cloth bag air duct 32 is lowered and the cold air sinks, and the differential pressure pre-cooling fan 33 is activated to pre-cool the lychees through the gaps in the transport frame. After the cold filling plate 13 is fully charged, it is directly installed on the unfolded left, right, front and rear side panels 142, then the side panels 142 are erected and the box is sealed. Finally, the top cover 143 is put on and sealed (the top cover 143 can be unfolded along with the side panels 142). Then the insulated box 14 is moved out of the cold storage, loaded onto a truck and shipped. It can maintain the internal temperature of 3-5℃ for up to 40 hours, avoiding the problem of ice packs squeezing the space or damaging the lychees.

[0098] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0099] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0100] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for charging a coldness, characterized in that, include: The main unit is equipped with a refrigerant channel, which is connected to an external cold source. Branch pipes are provided on the main pipe and distributed at intervals along the axial direction of the main pipe, and one end of the branch pipe is connected to the refrigerant channel; A cooling plate is detachably connected to the branch pipe. The cooling plate is provided with water injection holes at intervals. Any one of the water injection holes is inserted into any one of the branch pipes to make icicles. as well as An insulated box, wherein the cold-filling plate is detachably mounted on the insulated box; The branch pipe is provided with n rows of cooling plates, n≥2; a heating element is provided between two adjacent cooling plates located on the axial direction of the branch pipe, and the heating element is provided with a second through hole to facilitate the passage of the branch pipe, for melting the ice layer between two adjacent cooling plates on the axial direction of the branch pipe.

2. The cold-filling device of claim 1, wherein m rows of cooling plates are arranged along the axial direction of the main pipe, and the axial direction of the main pipe intersects with the axial direction of the branch pipe; Where m≥2.

3. The cooling device according to claim 2, characterized in that, The cooling plate is provided with a connecting plate on the side away from the main pipe. The connecting plate is provided with a first through hole that communicates with the water injection hole. The diameter of the first through hole is smaller than the diameter of the water injection hole.

4. The cooling device according to claim 1, characterized in that, The cooling plate is provided with sealing elements on both sides, and the sealing elements cover both ends of the water injection hole.

5. The cooling device according to claim 1, characterized in that, The insulated box includes a base, side panels, and a top cover. The top cover is foldably connected to the side panels, and the side panels are foldably connected to the base. The cooling plate is detachably connected to any one of the base, the side plate, and the top cover.

6. The cooling device according to claim 5, characterized in that, The base is provided with a first pivot around its perimeter, and the side plate is rotatably connected to the base via the first pivot. One of the side plates is provided with a first slot on each side, and the other side plate adjacent to the first side plate is provided with a buckle on each side that engages with the first slot.

7. The cooling device according to claim 5, characterized in that, A second pivot is provided on the side of the side plate away from the base, and the top cover is rotatably connected to the side plate through the second pivot. The other side plate adjacent to the side plate has a snap-fit ​​protrusion on the side away from the base, and the top cover has a second slot on the side facing the base that snaps into the snap-fit ​​protrusion.

8. The cooling device according to claim 5, characterized in that, The base, the side plate, and the top cover are provided with a groove for fitting the cooling plate.

9. A cooling system, characterized in that, It includes an external cold source and a cooling device as described in any one of claims 1 to 8.

10. The cooling system according to claim 9, characterized in that, The external cold source includes a compressor, an outdoor heat exchanger, a throttling element, and an indoor heat exchanger. The third refrigerant inlet of the outdoor heat exchanger is connected to the exhaust port of the compressor via a first pipe, and the third refrigerant outlet of the outdoor heat exchanger is connected to the throttling element. The second refrigerant inlet of the indoor heat exchanger is connected to the throttling element via a second pipe, and the second refrigerant outlet of the indoor heat exchanger is connected to the air inlet of the compressor via a third pipe. The main refrigerant channel has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the second pipe via a fourth pipe, and the first refrigerant outlet is connected to the third pipe. A cooling valve is provided on the fourth pipe.

11. The cooling system according to claim 10, characterized in that, A fifth pipeline is provided between the first pipeline and the fourth pipeline, and a heating bypass valve is provided on the fifth pipeline.

12. The cooling system according to claim 11, characterized in that, The fourth pipeline is equipped with a check valve, and one end of the fifth pipeline is connected to the first pipeline, while the other end is connected to the outlet of the check valve.

13. A method for charging a cooling system as described in any one of claims 9 to 12, characterized in that, include: Insert the branch pipe into the water injection hole of the cooling plate and inject water into the water injection hole of the cooling plate; An external cold source is used to make ice by utilizing the low-temperature heat conduction of the branch pipes to the cold-filled plate; After ice making is complete, remove the cold filling plate and put it into an insulated box.

14. A mobile cold storage facility, characterized in that, include: Vehicle body; as well as The cooling system as described in any one of claims 9 to 12, wherein the cooling system is disposed on the vehicle body.

15. The mobile cold storage according to claim 14, characterized in that, An air supply pipe is provided at the air outlet of the indoor heat exchanger of the cooling system, and the air outlet of the air supply pipe faces the insulation box. A differential pressure pre-cooling fan is provided in the vehicle body, and a return air port connected to the air outlet of the indoor heat exchanger is provided in the vehicle body to form a differential pressure pre-cooling cycle.

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