Portable liquid nitrogen temperature-controlled box

Abstract

A portable liquid nitrogen temperature control box, comprising a combined box, a heat preservation layer is arranged in the combined box, a heat insulation layer for placing liquid nitrogen is embedded in the heat preservation layer, a heating plate is arranged in the heat insulation layer, a temperature control disc is movably arranged at the opening of the upper side of the heat preservation layer, a steam plate is arranged at the lower side of the temperature control disc, a constant temperature cavity is formed in the temperature control disc and is closed by the steam plate; the liquid nitrogen is heated by the heating plate, the vaporized liquid nitrogen passes through the steam plate to the constant temperature cavity, and then is heated by the temperature control disc, so that the constant temperature cavity maintains constant temperature; the combined box comprises a bottom shell, a middle shell is clamped and fixed on the upper side of the bottom shell, an upper shell is clamped and fixed on the upper side of the middle shell, a square hole is formed in the middle of the upper shell, the square hole is used for placing a heat preservation cover, the heat preservation cover is located on the upper side of the temperature control disc, the upper side of the temperature control disc is clamped on the inner side of the heat preservation cover, and the lower side of the temperature control disc is located in the heat preservation layer. The utility model has the advantages of fast temperature control speed, convenient carrying, small size and the like.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen transportation technology, and in particular to a portable liquid nitrogen temperature-controlled box. Background Technology

[0002] Liquid nitrogen is frequently used to maintain cryogenic environments in scientific research, medical sample storage, and biological product transportation, placing stringent requirements on precise temperature control and equipment portability. However, traditional liquid nitrogen storage devices have several shortcomings. Firstly, most devices lack adequate insulation; ordinary insulation materials are insufficient to effectively block external heat, leading to rapid liquid nitrogen vaporization. This not only wastes the nitrogen but also causes significant temperature fluctuations within the chamber, failing to meet the high temperature stability requirements of sample storage. Secondly, existing equipment lacks precise temperature control methods, unable to adjust the liquid nitrogen temperature to a specific value and maintain a constant temperature according to actual needs, affecting sample activity and experimental accuracy. Furthermore, traditional liquid nitrogen storage devices are bulky and cumbersome, lacking portable design and difficult to move flexibly between different locations, limiting their application in emergency medical care, field research, and other scenarios. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a portable liquid nitrogen temperature control box, thereby solving the above-mentioned defects.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A portable liquid nitrogen temperature control box, comprising:

[0006] The modular enclosure includes an insulation layer, within which is embedded a heat-insulating layer for holding liquid nitrogen. A heating plate is located within the heat-insulating layer. A temperature control plate is movably mounted at the upper opening of the insulation layer, and a vapor plate is located below the temperature control plate. A constant-temperature cavity is formed inside the temperature control plate and sealed by the vapor plate. The liquid nitrogen is heated by the heating plate, and the vaporized liquid nitrogen passes through the vapor plate to reach the constant-temperature cavity, where it is then heated by the temperature control plate to maintain a constant temperature.

[0007] In one or more embodiments of this utility model, the combined box includes a bottom outer shell, a middle outer shell is fixedly attached to the upper side of the bottom outer shell, an upper outer shell is fixedly attached to the upper side of the middle outer shell, a square hole is provided in the middle of the upper outer shell for placing a heat insulation cover, the heat insulation cover is located above the temperature control plate, the upper part of the temperature control plate is attached to the inner side of the heat insulation cover, and the lower part of the temperature control plate is located inside the heat insulation layer.

[0008] In one or more embodiments of this utility model, the upper and lower sides of the central outer shell are open, and a circuit board placement compartment is embedded in any one of the outer sides of the central outer shell. A touch screen is embedded and fixed in the middle of the outer side of the circuit board placement compartment.

[0009] In one or more embodiments of this utility model, a handle is hinged to the outer side of the central axis of the upper outer shell.

[0010] In one or more embodiments of this utility model, a switch, a power interface and a USB interface are also installed on the other outer side of the middle shell. A battery is disposed between the insulation layer and the middle shell. The battery is electrically connected to the switch, the power interface, the USB interface, the heating plate and the temperature control plate.

[0011] In one or more embodiments of this utility model, the insulation layer is made of polyurethane foam material, and the insulation layer has a cubic structure as a whole, with wiring grooves on its outer surface and edges; a first cylindrical groove is formed in the middle of the insulation layer, and a second cylindrical groove is formed on the upper side of the first cylindrical groove; the heat insulation layer is disposed in the first cylindrical groove, and the lower end of the temperature control plate is located in the second cylindrical groove; a stepped surface is formed at the connection between the first cylindrical groove and the second cylindrical groove.

[0012] In one or more embodiments of this utility model, the heat insulation layer is a cylindrical structure and a vacuum heat insulation layer, with a third cylindrical groove inside and an opening on the upper side. The heating plate is disposed at the bottom of the inner side of the third cylindrical groove, and the third cylindrical groove is used to hold liquid nitrogen. A first step is formed on the outer side of the heat insulation layer, and a second step is formed on the upper side of the first cylindrical groove. The first step and the second step are engaged with each other.

[0013] In one or more embodiments of this utility model, the temperature control plate includes a main body, a plate body is fixed to the main body by screws, a third step is formed at the connection between the main body and the plate body, a fourth step is formed in the square hole of the upper outer shell, and the temperature control plate is positioned by the engagement of the third step and the fourth step; a heating device is also provided inside the temperature control plate.

[0014] In one or more embodiments of this utility model, the steam plate is a circular plate with several vertically arranged through holes on its end face, the inner wall of the insulation layer forms a fourth step, the steam plate is limited and disposed on the fourth step, and the steam plate is located at the lower end of the main body and abuts against it.

[0015] The beneficial effects of this utility model are:

[0016] This invention significantly improves insulation and reduces liquid nitrogen loss through the combination of a modular enclosure, a high-performance insulation layer, and a vacuum insulation layer. The heating plate and temperature control plate work together to achieve precise temperature control and ensure stable temperature inside the enclosure. The handle design and reasonable internal layout make the equipment easy to carry, effectively solving the technical problems of poor insulation, inaccurate temperature control, and insufficient portability of traditional liquid nitrogen storage equipment. This invention has the advantages of fast temperature control, easy portability, small size, reduced liquid nitrogen evaporation, and increased storage time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure after the insulation cover has been removed;

[0019] Figure 3 yes Figure 2 A sectional view;

[0020] Figure 4 This is a schematic diagram of the structure of the insulation layer and the heat insulation layer. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] Example 1, as Figures 1 to 4 As shown in the figure, this embodiment provides a portable liquid nitrogen temperature control box. Through innovative structural design, the temperature control box achieves precise control of liquid nitrogen temperature and has good portability. It can be widely used in scientific research experiments, medical sample storage and other fields.

[0023] The modular enclosure consists of a bottom shell 5, a middle shell 6, and an upper shell 7, connected by snap-fit ​​mechanisms. This design not only facilitates the installation and maintenance of internal components but also effectively enhances the overall structural strength of the enclosure. The bottom shell 5 is made of high-strength engineering plastic, offering excellent impact resistance and corrosion resistance, effectively protecting internal components from external impacts and chemical corrosion. The middle shell 6 features openings on both the top and bottom, creating a continuous space for heat dissipation and air circulation. A circuit board storage compartment 9 is embedded on any of the outer sides, and a touch screen display 10 is fixedly embedded in the center of the outer side, allowing operators to easily set and monitor various parameters of the temperature control chamber. A handle 11 is hinged to the outer side of the central axis of the upper shell 7. The handle 11 is ergonomically designed with a non-slip rubber layer for easy carrying and transport, and can be folded for storage when not in use, reducing space occupation.

[0024] The insulation layer 1 has a cubic structure and is made of polyurethane foam. This material has an extremely low thermal conductivity, which can effectively reduce heat transfer and thus reduce energy consumption. Wiring channels are provided on the outer surface and edges of the insulation layer 1 to facilitate the arrangement of electrical wires and signal lines, making the internal wiring neater and more organized. A first cylindrical groove and a second cylindrical groove are provided in the middle of the insulation layer 1. The first cylindrical groove is used to place the heat insulation layer 2, and the second cylindrical groove is used to place the lower part of the temperature control panel 4. The connection between the two forms a stepped surface, which serves for positioning and support.

[0025] The insulation layer 2 is a cylindrical structure employing vacuum insulation technology, with a third cylindrical groove inside for holding liquid nitrogen. This vacuum design significantly reduces heat conduction and convection, effectively maintaining the liquid nitrogen at a low temperature. A first step is formed on the outer side of the insulation layer 2, which engages with a second step formed on the upper side of the first cylindrical groove, further enhancing the insulation effect and reducing the evaporation of liquid nitrogen.

[0026] The temperature control plate 4 includes a main body 41 and a plate body 42, which are fixedly connected by screws. A third step is formed at the connection between the main body 41 and the plate body 42, which engages with a fourth step formed within the square hole of the upper outer shell 7, thus limiting the placement of the temperature control plate 4 and ensuring its stability. A heating device is installed inside the temperature control plate 4, which can precisely control the temperature of the constant temperature chamber.

[0027] The steam plate 16 is a circular plate with several vertically arranged through holes 161 on its end face. The diameter of these through holes 161 is precisely calculated to ensure that the vaporized liquid nitrogen can pass through smoothly while also playing a certain role in throttling, so that the liquid nitrogen forms a uniform airflow distribution when passing through. The steam plate 16 is positioned on the fourth step of the inner wall of the insulation layer 1 and abuts against the lower end of the main body 41 to ensure that all the vaporized liquid nitrogen can enter the constant temperature chamber.

[0028] A switch 12, a power interface 13, and a USB interface 14 are installed on the other outer side of the middle outer shell 6. A battery 15 is disposed between the insulation layer 1 and the middle outer shell 6, and the battery 15 is electrically connected to the switch 12, power interface 13, USB interface 14, heating plate 3, and temperature control panel 4. This design allows the temperature control box to be used by connecting to an external power source via the power interface 13, or to operate independently using the built-in battery 15, improving the flexibility of the device. The USB interface 14 can be used for data transmission and software upgrades, facilitating device maintenance and functional expansion. A heating device is also provided inside the temperature control panel 4. The heating device adopts existing technology, such as heating wires and heating rods.

[0029] Example 2, this example is based on Example 1:

[0030] Regarding the modular enclosure, the bottom of the outer shell 5 features an anti-slip rubber pad, increasing friction with the surface and making the equipment more stable, especially suitable for uneven environments. The circuit board compartment 9 in the middle shell 6 is waterproof, equipped with a waterproof sealing ring and waterproof interface, effectively preventing liquid ingress and improving the safety of the equipment in humid environments.

[0031] For the thermal insulation structure, the polyurethane foam material of insulation layer 1 has been upgraded to a higher density model with stronger thermal insulation performance, further reducing heat transfer efficiency. The vacuum insulation layer of insulation layer 2 has been improved in manufacturing process, adopting more advanced vacuuming technology and sealing process, extending the service life of the vacuum insulation layer and ensuring long-term stable thermal insulation effect.

[0032] A thermally conductive silicone layer is added between the main body 41 and the plate 42 of the temperature control plate 4, which improves heat transfer efficiency and makes temperature control more sensitive and precise. At the same time, a temperature sensor is added to the temperature control plate 4, which can more accurately monitor temperature changes inside the chamber and feed the data back to the control circuit in real time, achieving more precise temperature control.

[0033] Through these optimizations and improvements, the portable liquid nitrogen temperature control box in this embodiment has significantly improved in terms of heat preservation performance, temperature control accuracy, and environmental adaptability, and can better meet the user's needs in different scenarios.

[0034] Working principle of this utility model:

[0035] In practical use, when the temperature control chamber is needed, liquid nitrogen is first poured into the insulation layer 2; the required constant temperature is set through the touch display screen 10, and after the switch 12 is turned on, the heating plate 3 begins to heat the liquid nitrogen; the liquid nitrogen vaporizes upon heating, and the generated nitrogen gas enters the constant temperature chamber through the through hole 161 on the vapor plate 16; the heating device in the temperature control plate 4 precisely heats the nitrogen gas entering the constant temperature chamber according to the preset temperature, so that the constant temperature chamber is maintained within the set temperature range; throughout the process, the insulation layer 1 and the insulation layer 2 work together to reduce heat loss and reduce liquid nitrogen consumption; the touch display screen 10 displays the temperature inside the constant temperature chamber in real time and can be adjusted as needed; the battery 15 provides stable power support for the entire system, ensuring that the equipment can work normally in different environments.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A portable liquid nitrogen temperature-controlled box, characterized by, include: The modular enclosure has an insulation layer (1) inside, an insulation layer (2) for placing liquid nitrogen is embedded in the insulation layer (1), a heating plate (3) is installed in the insulation layer (2), a temperature control plate (4) is movably installed at the upper opening of the insulation layer (1), and a steam plate (16) is installed on the lower side of the temperature control plate (4). The temperature control plate (4) forms a constant temperature cavity and is sealed by the steam plate (16). The liquid nitrogen is heated by the heating plate (3), and the vaporized liquid nitrogen passes through the steam plate (16) to reach the constant temperature cavity. Then it is heated by the temperature control plate (4) to keep the constant temperature cavity at a constant temperature.

2. The portable liquid nitrogen temperature control box according to claim 1, characterized in that: The combined housing includes a bottom outer shell (5), a middle outer shell (6) is fixedly attached to the upper side of the bottom outer shell (5), an upper outer shell (7) is fixedly attached to the upper side of the middle outer shell (6), a square hole is provided in the middle of the upper outer shell (7), the square hole is used to place the heat insulation cover (8), the heat insulation cover (8) is located on the upper side of the temperature control plate (4), the upper part of the temperature control plate (4) is attached to the inner side of the heat insulation cover (8), and the lower part of the temperature control plate (4) is located inside the heat insulation layer (1).

3. A portable liquid nitrogen temperature control box according to claim 2, characterized in that: The upper and lower sides of the middle outer shell (6) are open. A circuit board placement compartment (9) is embedded in any one of the outer sides of the middle outer shell (6). A touch screen (10) is embedded and fixed in the middle of the outer side of the circuit board placement compartment (9).

4. A portable liquid nitrogen temperature control box according to claim 2, characterized in that: A handle (11) is hinged to the outside of the central axis of the upper outer shell (7).

5. A portable liquid nitrogen temperature control box according to claim 2, characterized in that: A switch (12), a power interface (13), and a USB interface (14) are also installed on the other outer side of the middle shell (6). A battery (15) is provided between the insulation layer (1) and the middle shell (6). The battery (15) is electrically connected to the switch (12), the power interface (13), the USB interface (14), the heating plate (3), and the temperature control plate (4).

6. A portable liquid nitrogen temperature control box according to claim 1, characterized in that: The insulation layer (1) is made of polyurethane foam material. The insulation layer (1) has a cubic structure and wiring grooves are provided on its outer surface and edges. A first cylindrical groove is provided in the middle of the insulation layer (1), and a second cylindrical groove is provided on the upper side of the first cylindrical groove. The heat insulation layer (2) is located in the first cylindrical groove, and the lower end of the temperature control plate (4) is located in the second cylindrical groove. A stepped surface is formed at the connection between the first cylindrical groove and the second cylindrical groove.

7. A portable liquid nitrogen temperature control box according to claim 6, characterized in that: The heat insulation layer (2) is a cylindrical structure and a vacuum heat insulation layer. It has a third cylindrical groove inside and an opening on the upper side. The heating plate (3) is located at the bottom of the inner side of the third cylindrical groove. The third cylindrical groove is used to hold liquid nitrogen. A first step is formed on the outer side of the heat insulation layer (2), and a second step is formed on the upper side of the first cylindrical groove. The first step and the second step are engaged.

8. A portable liquid nitrogen temperature control box according to claim 2, characterized in that: The temperature control plate (4) includes a main body (41), on which a plate body (42) is fixed by screws. A third step is formed at the connection between the main body (41) and the plate body (42), and a fourth step is formed in the square hole of the upper outer shell (7). The temperature control plate (4) is positioned by the engagement of the third step and the fourth step. A heating device is also provided inside the temperature control plate (4).

9. A portable liquid nitrogen temperature control box according to claim 8, characterized in that: The steam plate (16) is a circular plate with several vertically arranged through holes (161) on its end face. The inner wall of the insulation layer (1) forms a fourth step. The steam plate (16) is positioned on the fourth step. The steam plate (16) is located at the lower end of the main body (41) and abuts against it.

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