Portable medical refrigerating box

Abstract

The utility model provides a portable medical refrigerating box which comprises a main box body and a detachable PCM cold storage plate, the main box body is composed of an outer box and an inner container, the inner container is arranged in the outer box, and the detachable PCM cold storage plate is arranged on the inner wall face of the inner container. A refrigeration assembly is arranged in the inner container and comprises a semiconductor refrigerator arranged at the inner bottom of the outer box and a cooling fan arranged on the side wall of the bottom of the outer box. The cold end of the semiconductor cooler is tightly connected with the bottom of the inner container through low-temperature glue, and a cooling fan is arranged on one side of the hot end of the semiconductor cooler. The heat preservation effect of the main box body is improved through the design of the outer box and the inner container, and the heat preservation effect is further achieved through the PCM cold storage plate; and moreover, the purposes of active cooling and temperature maintaining are achieved through the semiconductor cooler, the problems that the temperature rise of a traditional heat preservation and refrigeration box is irreversible and the heat preservation effect is poor are solved, and the heat preservation and refrigeration box is suitable for long-time and long-distance heat preservation and refrigeration application.

Description

Technical Field

[0001] The utility model relates to a refrigeration container, in particular to a portable medical refrigerator with improved heat preservation effect. Background Art

[0002] Portable refrigerators are widely used and are closely related to modern life and production. In the case of no power supply, portable refrigerators can be used for long-distance low-temperature transportation of some important medical items, such as vaccines, drugs, biological reagents, blood, organs, etc.; in addition, they can also be used to refrigerate food or common drugs for some special patients, such as insulin, when at home or traveling.

[0003] Existing portable refrigerators mainly use foaming materials as the box body heat insulation layer, and the heat preservation effect is poor. As the refrigeration preservation time goes by, heat exchange occurs between the internal environment of the box and the external environment, resulting in an increase in the temperature inside the refrigerator; and currently, most medical refrigerators use cold storage agents as the cold source, and the temperature increase is irreversible, which cannot meet the requirement of keeping items at a constant temperature for a long time and is not suitable for long-distance transportation. For example, Chinese Patent CN202222026697.2 in the prior art discloses a portable red wine heat preservation bag, the box body is made of heat preservation foaming materials, and cold storage agents are placed inside. This existing refrigeration container has problems such as poor heat preservation effect, irreversible temperature increase, and inability to achieve long-distance and long-time refrigeration; therefore, it is necessary to improve this, and invent a technology with good heat preservation effect and the temperature maintained in a certain range to achieve long-distance and long-time cold fresh preservation. Summary of the Utility Model

[0004] In order to solve the problems existing in the above technology, the utility model provides a portable medical refrigerator, which solves the problems of poor heat preservation effect of the existing refrigerator, irreversible temperature increase, inability to keep items at a constant temperature for a long time, and difficulty in long-distance transportation.

[0005] A portable medical refrigerator provided by the utility model includes a main box body and a detachable PCM cold storage plate. The main box body is composed of an outer box and an inner liner. The inner liner is arranged inside the outer box, and a detachable PCM cold storage plate is provided on the inner wall surface of the inner liner;

[0006] There is a refrigeration component in the inner liner. The refrigeration component includes a thermoelectric cooler arranged at the bottom inside the outer box and a heat dissipation fan arranged on the side wall at the bottom of the outer box; the cold end of the thermoelectric cooler is tightly connected to the bottom of the inner liner, and a heat dissipation fan is arranged on one side of the hot end of the thermoelectric cooler.

[0007] Preferably, fixing parts are further arranged around the inner liner for fixing the PCM cold storage plate.

[0008] Preferably, the fixing member is a plugging rod or a clamping groove; protrusions are formed on the wall surface of the inner container, and a clamping groove is formed between two protrusions, and a PCM cold storage plate is placed in the clamping groove to form a refrigerating chamber of the partition unit.

[0009] Preferably, a heat dissipation window is provided on the bottom side wall of the outer box; a composite heat insulation layer is provided between the outer box and the inner container.

[0010] Preferably, the outer box further includes a cover plate, the cover plate is hinged to the top opening end of the outer box through a hinge, the cover plate is adapted to the top opening of the outer box, and a composite heat insulation layer is also provided inside the cover plate.

[0011] Preferably, the composite heat insulation layer is composed of three layers of materials: a polyurethane foam layer - a phase change material layer - a polyurethane foam layer.

[0012] Preferably, the semiconductor refrigerator is electrically connected to a power supply, and the power supply is a 12V external power supply or a rechargeable battery.

[0013] Preferably, the PCM cold storage plate has a filling material, and the phase change temperature range of the filling material is -20 to 8 °C.

[0014] Preferably, the PCM cold storage plate is filled with a phase change material, and the phase change material is any one of organic phase change microcapsules, inorganic phase change microcapsules, organic phase change materials, and inorganic phase change materials;

[0015] Among them, the organic phase change materials include at least one of paraffin waxes, fatty acids, and polyols; the inorganic phase change materials include at least one of sodium sulfate, sodium acetate, and sodium carbonate; the phase change temperature of the phase change material is in the range of -20 °C to 8 °C;

[0016] Preferably, the refrigerated box further includes a positioning module and a communication module. The positioning module is used to locate the real-time position of the refrigerated box, and the communication module is electrically connected to the positioning module to upload the position information of the refrigerated box.

[0017] Preferably, the cold end of the semiconductor refrigerator is tightly connected to the bottom of the inner container through a low-temperature adhesive.

[0018] Compared with the prior art, the utility model has the following technical effects:

[0019] In the basic scheme of the utility model, the main box body improves the heat insulation effect through the design of the outer box and the inner container, and further improves the heat insulation effect through the PCM cold storage plate; furthermore, the purpose of active cooling and temperature maintenance is achieved through the semiconductor refrigerator, avoiding the problems of irreversible temperature rise and poor heat insulation effect of traditional heat insulation refrigerated boxes, and is suitable for long-term and long-distance heat insulation refrigeration applications.

[0020] In the preferred embodiment, the utility model is provided with a polyurethane foam layer - a phase change material layer - a polyurethane foam layer, which can effectively enhance the heat insulation effect, reduce the heat exchange speed between the refrigerated box and the external environment, and extend the time of the constant temperature state required inside the box; the phase change temperature of the phase change material in the phase change material layer of the PCM cold storage plate is between 20°C and 28°C, which can play a role in heat storage, delay the time for heat to enter the inner container, and enable the items inside the box to be stored for a long time;

[0021] In the preferred embodiment, the utility model is provided with a detachable PCM cold storage plate around the inner container, and the phase change temperature range of the PCM in the cold storage plate is -20 to 8°C. This cold storage plate can not only act as a cold source to keep the items inside the box stored at the required low temperature, but also place cold storage plates with different phase change temperatures for items with different temperature requirements, thereby expanding the application scenarios of the refrigerated box and improving the storage and transportation efficiency;

[0022] In the preferred embodiment, the utility model uses a semiconductor refrigerator as the cold source for active temperature control, enabling the temperature inside the refrigerated box to be compensated in a timely manner, and realizing active refrigeration temperature control for the refrigerated box under indoor power supply or vehicle power supply, and thus can be used for long-term low-temperature storage of items. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of a portable medical refrigerated box of the utility model with the lid opened;

[0024] Figure 2 is a schematic diagram of the back of a portable medical refrigerated box of the utility model with the lid opened;

[0025] Figure 3 is a portable medical refrigerated box of the utility model Figure 2 is a schematic diagram of the B-B cross-sectional view;

[0026] Figure 4 is a schematic diagram of the side of a portable medical refrigerated box of the utility model with the lid opened;

[0027] Figure 5 is a portable medical refrigerated box of the utility model Figure 4 is a schematic diagram of the C-C cross-sectional view;

[0028] Figure 6 is a schematic diagram of the structure of a portable medical refrigerated box of the utility model;

[0029] Figure 7 is a schematic diagram of the composite insulation layer structure of a portable medical refrigerated box of the utility model;

[0030] Description of the Reference Numerals:

[0031] 1 - Main box body; 11 - Outer box; 12 - Inner liner; 13 - Cover plate; 14 - Hinge; 2 - PCM cold storage plate; 3 - Refrigeration component; 31 - Thermoelectric cooler; 32 - Cooling fan; 4 - Composite insulation layer; 5 - Fixing piece; 6 - Heat dissipation window. Detailed implementation mode

[0032] Embodiment 1:

[0033] As Figures 1 to 6 shown, a portable medical refrigerator provided by the present utility model includes a main box body 1 and a detachable PCM cold storage plate 2. The main box body 1 is composed of an outer box 11 and an inner liner 12. The inner liner 12 is arranged inside the outer box 11, and a detachable PCM cold storage plate 2 is provided on the inner wall surface of the inner liner 12;

[0034] A refrigeration component 3 is arranged in the inner liner 12. The refrigeration component 3 includes a thermoelectric cooler 31 arranged at the inner bottom of the outer box 11 and a cooling fan 32 arranged on the bottom side wall of the outer box 11; the cold end of the thermoelectric cooler 31 is tightly connected to the bottom of the inner liner 12, and a cooling fan 32 is arranged on one side of the hot end of the thermoelectric cooler 31.

[0035] In the actual application of the refrigerator of the present utility model, the outer box 11 plays a role of support and structural protection, generally made of hard plastic or metal. The inner liner 12 plays the first layer of heat preservation effect, and the PCM cold storage plate 2 plays the second layer of heat preservation effect. Moreover, the heat preservation principles of these two layers of insulation layers are different. The first layer of inner liner conducts heat insulation, while the second layer of cold storage plate actively cools through the phase change of the material. The two cooperate to achieve a better heat preservation effect.

[0036] Furthermore, through the refrigeration component 3 arranged at the bottom, active cooling is carried out, and the cooling fan 32 at the bottom on one side is used to discharge heat in time. The structural arrangement is reasonable. Through the setting of the cold storage plate 2 made of phase change material and the refrigeration component 3, the temperature change in the box body can be well controlled, achieving the refrigeration and heat preservation effects for long distances and long times.

[0037] Embodiment 2:

[0038] On the basis of Embodiment 1, in this embodiment:

[0039] Preferably, the cold end of the thermoelectric cooler is tightly connected to the bottom of the inner liner through a low-temperature adhesive, and the low-temperature adhesive is an existing bonding material.

[0040] Preferably, fixing pieces 5 are further arranged around the inner liner 12, and the fixing pieces 5 are used to fix the PCM cold storage plate 2.

[0041] Preferably, the fixing member 5 is a plugging rod or a clamping groove; protrusions are formed on the wall surface of the inner container 12, and a clamping groove is formed between two protrusions. The PCM cold storage plate 2 is placed in the clamping groove to form a refrigerating chamber of the partition unit. The plugging rod is a screw structure, so that the PCM cold storage plate 2 can be fixed to the inner container by means of insertion and fastening, which is convenient for disassembly; in addition, by means of the clamping groove, it can be divided into multiple refrigerating units by placing the PCM cold storage plate 2, and items to be refrigerated are placed in each refrigerating unit, making it more convenient to use.

[0042] Preferably, a heat dissipation window 6 is provided on the bottom side wall of the outer box 11; a composite heat insulation layer 4 is provided between the outer box 11 and the inner container 12. Preferably, the composite heat insulation layer 4 is composed of three layers of materials: a polyurethane foam layer - a phase change material layer - a polyurethane foam layer. The phase change material layer has a heat storage function, which can effectively delay the time for heat to enter the box body, improve the heat insulation effect of the heat insulation layer, and further extend the refrigerating time of the items in the box. As Figure 7 shown, the composite heat insulation layer 4 includes PU polyurethane foam layers on both sides and a PCM (Phase Change Material) phase change material layer in the middle.

[0043] Preferably, the outer box 11 further includes a cover plate 13, the cover plate 13 is hinged to the top opening end of the outer box 11 through a hinge 14, the cover plate 13 is adapted to the top opening of the outer box 11, and a composite heat insulation layer 4 is also provided inside the cover plate 13.

[0044] Preferably, the semiconductor refrigerator 31 is electrically connected to a power supply, and the power supply is a 12V external power supply or a rechargeable battery. To supply power to the semiconductor refrigerator 31 and the heat dissipation fan 32.

[0045] Preferably, the PCM cold storage plate 2 has a filling material, and the phase change temperature range of the filling material is -20 to 8 °C. By filling different phase change materials, PCM cold storage plates with different phase change point temperatures can be obtained, and then used in application scenarios with different temperature requirements; the PCM cold storage plate can be used as a cold source with a constant temperature to continuously provide cold for the items in the box, thereby extending the refrigerating time. The phase change materials involved in the filling material are all materials in the prior art, and their components are not improved. Existing phase change materials that meet the temperature requirements can be used in this patent.

[0046] Preferably, the PCM cold storage plate 2 is filled with a phase change material, and the phase change material is any one of organic phase change microcapsules, inorganic phase change microcapsules, organic phase change materials, and inorganic phase change materials; or other existing types of phase change materials are used.

[0047] Among them, the organic phase change materials include at least one of: paraffins, fatty acids, polyols; the inorganic phase change materials include at least one of: sodium sulfate, sodium acetate, sodium carbonate; these materials are preferred solutions, and other existing types of phase change materials can also be used.

[0048] The phase change temperature of the phase change material is in the range of -20°C to 8°C;

[0049] Preferably, the refrigerator also includes a positioning module and a communication module. The positioning module is used to locate the real-time position of the refrigerator, and the communication module is electrically connected to the positioning module to upload the position information of the refrigerator. The positioning module uses an existing module with position positioning and establishes a communication relationship with the communication module for signal transmission.

Claims

1. A portable medical refrigerator, comprising a main body (1) and a detachable PCM cold storage plate (2), characterized in that: The main box body (1) is composed of an outer box (11) and an inner liner (12); the inner liner (12) is arranged inside the outer box (11); and a detachable PCM cold storage plate (2) is provided on the inner wall surface of the inner liner (12); The inner tank (12) has a refrigeration assembly (3), which includes a semiconductor refrigerator (31) arranged at the bottom of the outer box (11) and a heat dissipation fan (32) arranged on the bottom side wall of the outer box (11); the cold end of the semiconductor refrigerator (31) is tightly connected to the bottom of the inner tank (12), and the heat dissipation fan (32) is arranged on the hot end side of the semiconductor refrigerator (31).

2. The portable medical refrigerator according to claim 1, characterized in that: Fixing members (5) are also provided around the inner tank (12), and the fixing members (5) are used to fix the PCM cold storage plate (2).

3. The portable medical refrigerator according to claim 2, characterized in that: The fixing member (5) is a plug-in rod or a clamping groove; a protrusion is formed on the wall surface of the inner tank (12), the clamping groove is formed between two protrusions, and the PCM cold storage plate (2) is placed in the clamping groove to form a cold storage room of the partition unit.

4. The portable medical refrigerator according to claim 1, characterized in that: A heat dissipation window (6) is provided on the bottom side wall of the outer box (11); and a composite heat-insulating layer (4) is provided between the outer box (11) and the inner container (12).

5. The portable medical refrigerator according to claim 4, characterized in that: The outer box (11) further comprises a cover plate (13), wherein the cover plate (13) is hingedly connected to the top opening end of the outer box (11) via a hinge (14), the cover plate (13) is adapted to the top opening of the outer box (11), and the composite thermal insulation layer (4) is also arranged inside the cover plate (13).

6. The portable medical refrigerator according to claim 4 or 5, characterized in that: The composite thermal insulation layer (4) is composed of three layers of materials: polyurethane foam layer-phase change material layer-polyurethane foam layer.

7. The portable medical refrigerator according to claim 1, characterized in that: The semiconductor refrigerator (31) is electrically connected to a power source, and the power source is a 12V external power source or a rechargeable battery.

8. The portable medical refrigerator according to claim 1, characterized in that: The PCM cold storage plate (2) is filled with a phase change material, and the phase change material is an organic phase change material or an inorganic phase change material; wherein the organic phase change material includes at least one of paraffin, fatty acid, and polyol; and the inorganic phase change material includes at least one of sodium sulfate, sodium acetate, and sodium carbonate.

9. The portable medical refrigerator according to any one of claims 1 to 5, characterized in that: The refrigerator further includes a positioning module and a communication module. The positioning module is used to locate the real-time position of the refrigerator. The communication module is electrically connected to the positioning module to upload the position information of the refrigerator.

10. The portable medical refrigerator according to any one of claims 1 to 5, characterized in that: The cold end of the semiconductor refrigerator is tightly connected to the bottom of the inner tank through low-temperature glue.

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