Ultra-low temperature freezer for blood transfusion department

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a super low temperature freezer for blood transfusion department. Including freezer body, the storage area in freezer body inside is separated into the chamber that is independent each other through a plurality of baffle, each chamber is slidably connected with the receiving seat in, the top of receiving seat is equipped with a plurality of storage groove, the top of receiving seat at every storage groove is equipped with the RFID label corresponding with storage groove, the corresponding RFID label is installed in the chamber top and is equipped with the RFID label reader of reading and writing, the control panel of receiving the signal of reading and writing is installed on the box door of freezer body, the folding curtain that is closed to the chamber is arranged in every chamber, the movable side of folding curtain is connected with the chamber inner wall through the connecting piece, RFID label and reader are electrically connected, and the control panel is electrically connected. The utility model can more accurately take the blood plasma, and the risk of mistake is reduced as far as possible.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to an ultra-low temperature freezer for blood transfusion. Background Technology

[0002] Ultra-low temperature freezers are commonly used in blood transfusion departments. They are key equipment in modern medical blood transfusion departments for the long-term preservation of fresh frozen plasma, cryoprecipitate, and other blood products. These blood products usually need to be stored in an ultra-low temperature environment of -40°C or even -80°C to maintain their biological activity and therapeutic efficacy.

[0003] When storing plasma in current ultra-low temperature freezers, bagged or boxed blood products can usually only be stacked or laid flat, with plasma bags squeezing and obstructing each other. When it is necessary to find plasma of a specific blood type or a specific preparation date, operators often have to search through each layer, which is time-consuming and laborious. In emergency blood transfusions or busy work scenarios, relying solely on manual identification of labels greatly increases the probability of misuse. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-low temperature freezer for blood transfusion departments, which can accurately retrieve plasma and minimize the risk of accidental retrieval.

[0005] The aforementioned ultra-low temperature freezer for blood transfusion includes a freezer body. The storage area inside the freezer body is divided into independent chambers by several partitions. Each chamber has a slidably connected storage seat. The top of the storage seat has several storage slots for storing plasma bags. Each storage slot has an RFID tag on its top. A reader / writer for scanning the RFID tag is installed on the top of the chamber. A control panel for receiving reader / writer signals is installed on the door of the freezer body. Each chamber has a folding curtain for sealing the chamber. The movable side of the folding curtain is connected to the inner wall of the chamber through a connector. The RFID tag is electrically connected to the reader / writer, and the reader / writer is electrically connected to the control panel.

[0006] Furthermore, the connector includes a snap-fit ​​plate fixed to the bottom of the folding curtain, and a snap-fit ​​groove is provided at the bottom of the cavity to engage with the snap-fit ​​plate.

[0007] Furthermore, the left and right inner walls of the chamber are provided with mounting grooves, and the left and right sides of the folding curtain are embedded in the mounting grooves.

[0008] Furthermore, the end of the snap-fit ​​plate is slidably connected to the mounting groove.

[0009] Furthermore, the storage slot is equipped with a storage basket that is interference-fitted with it.

[0010] Furthermore, the storage base is slidably connected to the chamber via a damped slide rail.

[0011] Furthermore, the folding curtain is made of aluminum foil composite cross-linked polyethylene foam, with aluminum foil on the outside of the folding curtain and a reinforced polyester film on the surface of the aluminum foil.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention uses several storage slots in the storage base to store plasma bags individually. When the corresponding plasma needs to be retrieved, the location of the plasma bag can be viewed through the control panel. The reader in the chamber reads the information of the RFID tag and transmits it to the control panel. The plasma location is displayed on the screen of the control panel. Then, the door is opened, the storage base is pulled out of the chamber, and the plasma bag in the storage slot is retrieved. This allows for more accurate retrieval of plasma and minimizes the risk of mis-retrieval. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA; Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of BB; Figure 4 This is a perspective view of the present utility model; Figure 5 for Figure 4 Internal structure diagram; The components shown in the diagram are as follows: 1. Freezer body; 2. Storage base; 3. Slide rail; 4. Storage basket; 5. Control panel; 6. Partition; 7. RFID tag; 8. Snap-on plate; 9. Folding curtain; 10. Mounting slot. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0015] Example This embodiment describes an ultra-low temperature freezer for use in blood transfusion departments, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the system includes a freezer body 1. The storage area inside the freezer body 1 is divided into independent chambers by several partitions 6. Each chamber is slidably connected to a storage seat 2. The top of the storage seat 2 has several storage slots for storing plasma bags. Each storage slot has an RFID tag 7 corresponding to the storage slot. A reader is installed on the top of the chamber corresponding to the RFID tag 7 to receive the reader signal. A control panel 5 for identifying RFID tags on plasma bags is installed on the door of the freezer body 1. Each chamber is equipped with a folding curtain 9 to seal the chamber. The movable side of the folding curtain 9 is connected to the inner wall of the chamber through a connector. The RFID tag 7 is electrically connected to the reader, and the reader is electrically connected to the control panel 5. The freezer body 1 is existing technology. It includes an outer casing, an inner liner, and a door, all made of steel or stainless steel. An insulation layer, crucial for maintaining low temperatures, is filled between the outer casing and the inner liner. High-density polyurethane foam is typically used, and its thickness and insulation performance directly determine the freezer body 1's insulation effect and energy consumption. The freezer body 1's door is equipped with a sealing strip made of special low-temperature resistant silicone or magnetic rubber to ensure a tight seal when closed, preventing cold air leakage and hot air entry. A handle and safety lock ensure the door is securely closed and prevent unauthorized opening. The compressor compresses the refrigerant gas into... The high-temperature, high-pressure gas in the freezer body 1 typically employs a cascade refrigeration system, thus featuring a two-stage compressor. The high-temperature stage compressor handles the first stage of compression, while the low-temperature stage compressor handles the second stage, further compressing the refrigerant that has undergone the first stage of cooling. The condenser, usually located at the back or bottom of the freezer body 1, consists of fins and coils. Its function is to dissipate the heat from the high-temperature, high-pressure refrigerant gas discharged from the compressor into the air outside the freezer body 1, cooling and liquefying it into a high-pressure liquid. The evaporator, installed outside the inner liner, is the component that directly absorbs heat from inside the freezer, where the liquid refrigerant evaporates into gas. The refrigerant absorbs a large amount of heat, causing a rapid drop in temperature inside the freezer body 1. A throttling device, located between the condenser and evaporator, suddenly increases the cross-sectional area of ​​the channel, causing the high-pressure liquid refrigerant to depressurize and cool, becoming a low-temperature, low-pressure mist mixture, which then enters the evaporator to absorb heat. The freezer body 1 typically uses a mixed refrigerant or a special refrigerant. Temperature sensors are installed at multiple key locations inside the freezer body 1 to monitor temperature changes in real time. An alarm system will issue warnings via buzzer and flashing lights when the temperature exceeds the set range, the door is not properly closed, power is interrupted, or a system malfunction occurs. The freezer body 1 can... The plasma is formed into tiny, glassy ice crystals, thereby minimizing physical and chemical damage to the delicate protein molecules in the plasma. This allows hospitals and blood banks to establish a stable and sufficient stockpile of frozen plasma to cope with emergencies, large-scale rescues, rare blood type needs, and elective surgeries, ensuring the stability and accessibility of blood supply. The working principle and structure of the cryopreservation unit 1 for low-temperature preservation of plasma are existing technologies, and this embodiment does not improve upon them. Only the storage area inside the cryopreservation unit 1 for storing plasma bags is improved to better store plasma, make it easier to manage and identify, and facilitate storage and retrieval. The freezer body 1 is divided into several storage areas by several partitions 6. Each storage area is divided into several independent chambers by several partitions 6. Each chamber is slidably connected to a storage seat 2. The storage seat 2 is slidably connected to the chamber by a slider. Optimally, the storage seat 2 is slidably connected to the chamber by a damped slide rail 3. When pulled out, the storage seat 2 may slide out quickly due to inertia, causing a sudden stop or collision. The damper provides uniform resistance to ensure uniform speed and smooth opening and closing. Whether it is a quick pull or a quick push back, the final stage will be gently placed in place under the action of damping, completely avoiding the storage seat and the precious blood plasma inside from tipping over, falling or being damaged due to collision. The top of the storage base 2 has several storage slots. RFID tags 7 are printed and affixed to the top of each storage slot, indicating the location and information of the plasma bags placed in that slot. A reader / writer corresponding to each RFID tag 7 is installed on the top of the chamber. The RFID tags 7 and readers / writers are electrically connected. The RFID tags 7 and readers / writers are existing technologies; the reader / writer model can be FX7500, and the RFID tag 7 model can be AD-3015-1. Components requiring power in this embodiment can be connected to an external power source. A control panel 5 is installed on the door of the freezer body 1. The control panel 5 has a digital display screen and operation buttons. The control panel 5 can receive signals from the readers / writers. Each storage slot has an independent RFID tag 7, and a corresponding reader / writer is located directly above it. All locations can be scanned in real time without any manual intervention. The display screen of the control panel 5 can always show the latest plasma information. After any storage or retrieval operation, the system will instantly update the status to reflect inventory information. Each RFID tag 7 uniquely represents a specific location. For example, in a 1-row, 1-slot, 3-slot configuration, when a blood plasma bag is placed in a slot, the reader reads the RFID tag 7 and transmits the signal to the control panel 5. The control panel 5 accurately records which blood plasma bag is placed in which location. Simply input a command on the control panel 5, and the reader inside the chamber can quickly and non-contactly identify the RFID tags 7 on the top of all the storage seats 2, locate the corresponding blood plasma bag, open the door, find the corresponding chamber, pull the storage seat 2 out of the chamber, locate the corresponding blood plasma bag, and then retrieve it. Manual searching is required; when specific plasma needs to be retrieved, the control panel 5 can directly display the information of the storage slot on the screen, allowing for immediate retrieval upon opening the door, reducing the risk of accidental retrieval; by storing different plasma bags separately, they can be better preserved at low temperatures. After the storage seat 2 is pulled out of the chamber, a portion of the storage seat 2 remains connected to the chamber due to the restriction of the slide rail 3, thus ensuring the stability of the connection between the storage seat 2 and the chamber; it also reduces the loss of cold air in the freezer body 1, ensuring the stability of the temperature inside the chamber, which is beneficial for protecting the delicate clotting factors and protein activity in the plasma; Each chamber has a folding curtain 9 attached to the top. The bottom of the folding curtain 9 is connected to the bottom of the chamber through a connector. The connector includes a magnetic strip attached to the bottom of the folding curtain 9. An iron strip that attracts the magnetic strip is set at the bottom of the chamber. The folding curtain 9 is fixed by the mutual attraction between the two, so that it can be stretched to seal the opening of the chamber and ensure the low temperature insulation effect inside the chamber. Optimized connectors may also include a snap-fit ​​plate 8 fixed to the bottom of the folding curtain 9, with a slot at the bottom of the chamber that snaps into the snap-fit ​​plate 8; the snap-fit ​​plate 8 is attached to the bottom of the folding curtain 9, and the snap-fit ​​plate 8 has an inverted "L" shape structure. The vertical plate of the snap-fit ​​plate 8 is inserted into the slot at the bottom of the chamber and snaps into it, making it easy to remove the snap-fit ​​plate 8 from the slot through the horizontal plate of the snap-fit ​​plate 8, fold it to expose the chamber, pull the storage seat 2 out of the chamber, and take out or store the plasma bag in the storage tank; the snap-fit ​​between the snap-fit ​​plate 8 and the slot ensures that the bottom of the folding curtain 9 fits tightly with the bottom of the chamber, effectively preventing cold air from leaking from the most important bottom gap, and the snap-fit ​​is more secure and less likely to loosen due to movement or vibration of the freezer body 1; Furthermore, mounting grooves 10 are provided on both the left and right inner walls of the chamber, and the left and right sides of the folding curtain 9 are embedded in the mounting grooves 10; mounting grooves 10 are provided on both the left and right side walls of the chamber, and the left and right side walls of the folding curtain 9 are located in the mounting grooves 10, which makes the sealing and heat preservation effect of the folding curtain 9 better; the end of the snap-fit ​​plate 8 is slidably connected to the mounting groove 10, and the left and right ends of the snap-fit ​​plate 8 are respectively embedded in the corresponding mounting grooves 10. Rubber is glued to both the left and right ends of the snap-fit ​​plate 8, which increases the friction between the snap-fit ​​plate 8 and the inner wall of the mounting groove 10, so that the folding curtain 9 can stop at any height at the opening of the chamber when it is extended or folded, ensuring its sealing and heat preservation effect, and also facilitating the pulling out of the storage seat 2; when taking out or storing the plasma bag, the folding curtain 9 can be raised only halfway to minimize the loss of cold air; Furthermore, the folding curtain 9 is made of aluminum foil composite cross-linked polyethylene foam. An aluminum foil layer is placed on the outside of the folding curtain 9, and a reinforced polyester film is applied to the surface of the aluminum foil. In low-temperature environments, the cross-linked polyethylene foam remains flexible and will not become brittle, crack, or powder, allowing it to be folded and stretched. Its internal closed-cell structure contains a large amount of still air, resulting in extremely low thermal conductivity and providing excellent basic insulation performance. This effectively blocks heat transfer between the inside and outside, preventing warm, humid air from penetrating into the cold freezer body 1, thus avoiding the formation of destructive frost inside the folding curtain 9 and the chamber, ensuring effective low-temperature preservation of plasma. An aluminum foil layer is placed on the outside of the cross-linked polyethylene foam, and the aluminum foil can... With its highly efficient heat reflection, the radiant heat from the cold walls and components inside the freezer body 1, as well as the external radiant heat that enters when the door is opened, are all reflected back, improving the overall heat insulation efficiency of the folding curtain 9. A reinforced polyester film is adhered to the surface of the aluminum foil, which provides the folding curtain 9 with high tensile and tear strength, enabling it to withstand frequent folding, pulling, and occasional friction and collision, greatly extending its service life. It can be easily cleaned with disinfectants such as alcohol, is not easily soiled, and is easy to clean even if it gets dirty. It seals the soft cross-linked polyethylene foam core to prevent it from aging, oxidizing, or absorbing moisture from the environment due to long-term use, ensuring long-term stability of the heat insulation performance. like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a storage basket 4 is provided in the storage compartment with an interference fit. Each storage compartment contains a storage basket 4, which is interference-fitted with the storage compartment. The interference fit securely fixes the storage basket 4 in the storage compartment through friction, eliminating any space for movement or shaking. Even during emergency operations or when the freezer body 1 is moved, it ensures that the plasma bag remains upright and stable, greatly reducing the risk of sample damage due to physical collisions. The interference fit ensures that the entire outer wall of the storage basket 4 is in close contact with the cold inner wall of the storage compartment, reducing contact thermal resistance and establishing a more efficient heat conduction path. This allows the plasma bag to be cooled faster and maintain a more stable temperature during storage. Furthermore, when the storage basket 4 is contaminated or damaged, it can be removed from the storage compartment for cleaning, disinfection, or replacement, making it more flexible in use. In actual use, when storing plasma bags, plasma bags of the same blood type are placed in several storage slots of the storage base 2, slid into the independent chamber, and then the folding curtain 9 is pulled to seal the chamber opening. Under the action of the connector, the folding curtain 9 is kept stretched. The door is closed to preserve the plasma bags at low temperature. The RFID tag 7 on the top of the storage base 2 corresponds to the reader on the top of the chamber. The reader transmits the plasma information to the control panel 5 to update the plasma information in the freezer body 1 in real time. Pulling the folding curtain 9 to seal the chamber opening ensures the low temperature in the chamber. When the corresponding plasma needs to be retrieved, the location of the plasma bag is viewed on the display screen of the control panel 5. Then, the door is opened, the storage base 2 is pulled out of the chamber, and the plasma bag in the storage slot is retrieved without having to search, reducing the risk of accidentally taking the wrong plasma.

Claims

1. A cryogenic freezer for blood transfusion, comprising a freezer body (1), characterized in that: The storage area inside the freezer body (1) is divided into independent chambers by several partitions (6). Each chamber is slidably connected to a storage seat (2). The top of the storage seat (2) is provided with several storage slots for storing plasma bags. The top of the storage seat (2) at each storage slot is provided with an RFID tag (7) corresponding to the storage slot. A reader is installed on the top of the chamber corresponding to the RFID tag (7) to scan the RFID tag (7). A control panel (5) for receiving the reader signal is installed on the door of the freezer body (1). Each chamber is provided with a folding curtain (9) to seal the chamber. The movable side of the folding curtain (9) is connected to the inner wall of the chamber through a connector. The RFID tag (7) is electrically connected to the reader, and the reader is electrically connected to the control panel (5).

2. The ultra-low temperature freezer for blood transfusion departments according to claim 1, characterized in that: The connector includes a snap-fit ​​plate (8) fixed to the bottom of the folding curtain (9), and a snap-fit ​​groove is provided at the bottom of the cavity to snap into the snap-fit ​​plate (8).

3. The ultra-low temperature freezer for blood transfusion departments according to claim 2, characterized in that: The inner walls of the chamber are provided with mounting grooves (10), and the left and right sides of the folding curtain (9) are embedded in the mounting grooves (10).

4. The ultra-low temperature freezer for blood transfusion departments according to claim 3, characterized in that: The end of the snap-fit ​​plate (8) is slidably connected to the mounting groove (10).

5. The ultra-low temperature freezer for blood transfusion departments according to claim 1, characterized in that: The storage slot is equipped with a storage basket (4) that is interference-fitted with it.

6. The ultra-low temperature freezer for blood transfusion departments according to claim 1, characterized in that: The storage base (2) is slidably connected to the chamber via a damped slide rail (3).

7. The ultra-low temperature freezer for blood transfusion departments according to claim 1, characterized in that: The folding curtain (9) is made of aluminum foil composite cross-linked polyethylene foam. The outer side of the folding curtain (9) is provided with aluminum foil, and the surface of the aluminum foil is provided with an enhanced polyester film.

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