A stirling engine cryostat
By designing the conductive components and double-layer insulation structure of the Stirling machine cryogenic chamber, the problems of insufficient temperature uniformity and insulation performance of the cryogenic chamber are solved, achieving uniform temperature conduction and stable control, and improving the ease of operation and temperature monitoring accuracy of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN YUNSHUO TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-06-26
AI Technical Summary
Existing low-temperature chambers suffer from poor temperature uniformity, insufficient insulation performance, and unreasonable structural design, which affect sample storage effectiveness and ease of operation.
The Stirling engine cryogenic chamber design includes a conductive component and a double-layer insulation structure. The temperature is evenly conducted through the cooperation of the conductive frame and the heating plate. The insulation performance is improved by using a polyurethane foam layer and an insulation layer. A display screen and a temperature probe are installed on the chamber for real-time monitoring.
This achieves uniform and stable temperature within the cryogenic cavity, reduces heat exchange, optimizes the ease of use and functionality of the equipment, and improves the accuracy of temperature control.
Smart Images
Figure CN224415417U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration technology, and in particular to a Stirling machine low-temperature chamber. Background Technology
[0002] In numerous fields such as biological sample preservation, precision instrument testing, and semiconductor material research and development, the demand for low-temperature environments is increasing, and cryogenic chambers play a crucial role as key equipment. Existing cryogenic chambers face several technical bottlenecks:
[0003] Firstly, the temperature uniformity is poor. The cold energy generated by the refrigeration components of traditional low-temperature chambers is difficult to be evenly transferred to all parts of the chamber, resulting in large temperature differences in different areas of the chamber, which affects the sample storage effect and the accuracy of experimental data.
[0004] Secondly, the insulation performance is insufficient. Ordinary insulation materials cannot effectively block the transfer of external heat, which increases the energy consumption of the low temperature chamber and makes it difficult to maintain a stable low temperature environment.
[0005] Third, the structural design is unreasonable. The opening layout and internal space planning of the equipment are not conducive to material storage and retrieval and equipment maintenance. It lacks an intuitive temperature monitoring and control interface and has poor operation convenience. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a Stirling machine cryogenic chamber, thereby solving the above-mentioned defects.
[0007] The objective of this utility model is achieved through the following technical solution:
[0008] A Stirling machine cryogenic chamber, comprising:
[0009] The enclosure contains a refrigeration component, a foam layer, and a heat insulation layer. The heat insulation layer is located within the foam layer, and a storage frame is located within the heat insulation layer, forming a low-temperature cavity. The output end of the refrigeration component penetrates through the foam layer and the heat insulation layer. A conductive component is located between the heat insulation layer and the storage frame, and the energy generated by the refrigeration component is evenly conducted to the storage frame through the conductive component. The conductive component includes a conductive frame and a heating plate. The heating plate is located inside the conductive frame, and the storage frame is located inside the conductive frame, with its bottom in contact with the heating plate.
[0010] In one or more embodiments of this utility model, the conductive frame is an integral frame structure, the conductive frame includes a rectangular base plate, and several conductive strips are fixed on the four outer sides of the rectangular base plate. The conductive strips have bent portions, and the several conductive strips on the same outer side of the same end of the rectangular base plate have the same gap. The heating plate is placed at the bottom of the cavity formed by the base plate and the conductive strips.
[0011] In one or more embodiments of this utility model, the surface of the storage frame is provided with an aluminum PTFE coating, the upper side of the storage frame is an opening, and a flange edge is formed on the outer side of the opening, which forms a limit with the upper edge of the storage frame.
[0012] In one or more embodiments of this utility model, the box body includes a lower base, and an upper cover box is fixed on the base. The upper cover box has a first rectangular opening and a second rectangular opening. The area of the first rectangular opening is larger than the area of the second rectangular opening. A material storage heat insulation cover is provided on the first rectangular opening, and a PCB storage cover is provided on the second rectangular opening. Both the material storage heat insulation cover and the PCB storage cover are hinged to the upper cover box.
[0013] In one or more embodiments of this utility model, the heat insulation layer and the foam layer are both cuboid structures with an opening on the upper side. The bottom of the heat insulation layer and the foam layer are provided with rectangular openings. The output end of the refrigeration component is connected to the storage frame through the rectangular openings. The heat insulation layer, the foam layer and the storage frame are located below the first rectangular opening.
[0014] In one or more embodiments of this utility model, the refrigeration assembly includes a Stirling refrigerator fixed on the lower base, and the Stirling refrigerator is located below the insulation layer, the foam layer and the storage frame.
[0015] In one or more embodiments of this utility model, an inclined surface is formed on the upper side of the top cover box, the inclined surface is located in front of the second rectangular opening, and a display screen is installed on the inclined surface; temperature probes are installed on the upper sides of the four corners of the storage frame.
[0016] In one or more embodiments of this utility model, a USB interface, a power switch, a cooling fan, and a 24V power interface are also installed on the outside of the upper cover box; the USB interface, power switch, cooling fan, 24V power interface, temperature probe, and Stirling refrigerator are electrically connected.
[0017] The beneficial effects of this utility model are:
[0018] This utility model proposes a Stirling machine cryogenic chamber that, through the cooperation of the conductive frame and the heating plate in the conductive component, can evenly conduct the energy generated by the refrigeration component to the storage frame, ensuring uniform temperature within the cryogenic chamber; the double-layer structure of the polyurethane foam layer and the insulation layer effectively improves the insulation performance and reduces heat exchange; the reasonable planning of the chamber opening and internal layout, the setting of the display screen and temperature probe to realize real-time temperature monitoring, optimizes the ease of use and functionality of the equipment, and effectively solves the technical problems existing in current cryogenic chambers. Attached Figure Description
[0019] Figure 1This is an exploded structural diagram of this utility model;
[0020] Figure 2 This is a cross-sectional view of the present invention. 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 2 As shown, this embodiment provides a Stirling machine cryogenic chamber, which achieves precise control and uniform conduction of temperature inside the cryogenic chamber through the coordinated design of refrigeration components, conduction components and insulation structure. It is suitable for scientific research experiments, biological sample storage and other scenarios that require a stable low-temperature environment.
[0023] The enclosure consists of a lower base 12 and an upper cover 4. The upper cover 4 has a first rectangular opening and a second rectangular opening, with the first rectangular opening having a larger area than the second. The first rectangular opening is used to install the material hopper heat insulation cover 1, and the second rectangular opening is used to install the PCB hopper cover 3. Both are hinged to the upper cover 4 for easy opening and closing. The upper side of the upper cover 4 forms a slope, located in front of the second rectangular opening. A display screen 13 is mounted on the slope. This ergonomic design allows operators to clearly view temperature parameters without bending over, improving ease of use. A USB port 7, a power switch 8, a cooling fan 9, and a 24V power interface 10 are installed on the outside of the upper cover 4 and secured with screws, forming a complete electrical connection system. The 24V power interface 10 supplies power to the equipment, the USB port 7 transmits temperature data, and the cooling fan 9 dissipates heat from components such as the Stirling refrigerator 14, ensuring stable equipment operation.
[0024] Foam layer 5 is made of polyurethane, which has excellent thermal insulation properties and effectively prevents external heat from penetrating the chamber. Insulation layer 2 is located inside foam layer 5 and is also a cuboid structure. Both layers have rectangular openings at the bottom to provide channels for the output of the refrigeration components. Foam layer 5 and insulation layer 2 are bonded together with adhesive to form a tight insulation structure, further reducing heat conduction. This double-layer insulation design, compared to traditional single-insulation materials, reduces heat loss in the cryogenic chamber and ensures stable temperature within the chamber.
[0025] The refrigeration assembly includes a Stirling refrigerator 14 fixed to the lower base 12. It is located below the insulation layer 2, the foam layer 5, and the storage frame 6, and is secured by clips for easy disassembly and maintenance. The Stirling refrigerator 14 utilizes the reverse Stirling cycle principle, which has the advantages of high refrigeration efficiency and no environmental pollution, and can quickly reduce the temperature of the low-temperature chamber to the required range.
[0026] The heat transfer assembly, the core component for achieving uniform temperature distribution, includes a heat transfer frame 11 and a heating plate 15. The heat transfer frame 11 is a one-piece molded frame structure, comprising a rectangular base plate and heat transfer strips fixed to the four sides of the base plate. The heat transfer strips have bends, and there is a uniform gap between the outer heat transfer strips at the same end. This structural design increases the heat transfer area and improves heat transfer efficiency. The heating plate 15 is made of 6061 aluminum and is placed in the bottom cavity of the heat transfer frame 11. 6061 aluminum has excellent thermal conductivity, enabling it to quickly and evenly transfer the cooling energy generated by the Stirling refrigerator 14 to the storage frame 6. The storage frame 6 is located inside the heat transfer frame 11, with its bottom in contact with the heating plate 15. Its surface is coated with aluminum PTFE, which provides good thermal conductivity, prevents material adhesion at low temperatures, and enhances corrosion resistance. A flange is formed on the outer side of the opening on the upper side of the storage frame 6 to cooperate with the upper cover box 4 for positioning and to ensure sealing performance.
[0027] Temperature probes 16 are installed on the upper sides of the four corners of the storage frame 6, and are fixed with adhesive to allow for real-time monitoring of the temperature at different locations within the cryogenic cavity. The temperature probes 16 are electrically connected to the display screen 13, displaying the temperature data in real time for easy monitoring by operators. When the cryogenic cavity temperature deviates from the set value, the control system can adjust the output power of the Stirling refrigerator 14 or the operating status of the heating plate 15 to achieve precise temperature regulation, with a temperature control accuracy of ±0.5℃.
[0028] Working principle of this utility model:
[0029] After the equipment is connected to a 24V power supply, the system is started via power switch 8; the Stirling refrigerator 14 starts working, and the generated cold energy is evenly conducted to the storage frame 6 through the conduction frame 11 and heating plate 15, causing the temperature inside the low-temperature chamber to drop rapidly; the temperature probe 16 monitors the temperature in real time and feeds it back to the display screen 13. When the temperature reaches the set value, the system enters the constant temperature control mode; the operator can export the temperature data through the USB interface 7, or open the heat insulation cover 1 of the material compartment when it is necessary to add samples. The flange edge limiting structure of the storage frame 6 ensures that the cover is quickly restored to a sealed state after opening.
[0030] 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 Stirling engine cryostat, characterized by, include: The box contains a refrigeration component, a foam layer (5) and a heat insulation layer (2), the heat insulation layer (2) is located inside the foam layer (5), and a storage frame (6) is provided inside the heat insulation layer (2), forming a low-temperature cavity inside the storage frame (6); the output end of the refrigeration component passes through the foam layer (5) and the heat insulation layer (2), and a conduction component is provided between the heat insulation layer (2) and the storage frame (6), and the energy generated by the refrigeration component is uniformly conducted to the storage frame (6) through the conduction component; the conduction component includes a conduction frame (11) and a heating plate (15), the heating plate (15) is located inside the conduction frame (11), the storage frame (6) is located inside the conduction frame (11), and the bottom of the storage frame (6) is in contact with the heating plate (15).
2. The Stirling machine cryogenic chamber according to claim 1, characterized in that: The conductive frame (11) is a frame structure and is an integrally formed structure. The conductive frame (11) includes a rectangular base plate. Several conductive strips are fixed on the four outer sides of the rectangular base plate. The conductive strips have bent parts. Several conductive strips on the same outer side of the rectangular base plate have the same gap. The heating plate (15) is placed at the bottom of the cavity formed by the base plate and the conductive strips.
3. The Stirling machine cryogenic chamber according to claim 1, characterized in that: The surface of the storage frame (6) is coated with aluminum PTFE. The upper side of the storage frame (6) is open, and a flange edge is formed on the outside of the opening. The flange edge and the upper edge of the storage frame (6) form a limit.
4. A Stirling machine cryogenic chamber according to claim 1, characterized in that: The box includes a lower base (12), and an upper cover box (4) is fixed on the base (12). The upper cover box (4) has a first rectangular opening and a second rectangular opening. The area of the first rectangular opening is larger than the area of the second rectangular opening. A material storage heat insulation cover (1) is provided on the first rectangular opening, and a PCB storage cover (3) is provided on the second rectangular opening. Both the material storage heat insulation cover (1) and the PCB storage cover (3) are hinged to the upper cover box (4).
5. A Stirling machine cryogenic chamber according to claim 4, characterized in that: The insulation layer (2) and the foam layer (5) are both cuboid structures with an opening on the upper side. The bottom of the insulation layer (2) and the foam layer (5) has a rectangular opening. The output end of the refrigeration component is connected to the storage frame (6) through the rectangular opening. The insulation layer (2), the foam layer (5) and the storage frame (6) are located below the first rectangular opening.
6. A Stirling machine cryogenic chamber according to claim 4, characterized in that: The refrigeration assembly includes a Stirling refrigerator (14) fixed on the lower base (12), the Stirling refrigerator (14) being located below the insulation layer (2), the foam layer (5) and the storage frame (6).
7. A Stirling machine cryogenic chamber according to claim 4, characterized in that: The upper side of the top cover box (4) is also formed with a slope, which is located in front of the second rectangular opening. A display screen (13) is installed on the slope. Temperature probes (16) are installed on the upper sides of the four corners of the storage frame (6).
8. A Stirling machine cryogenic chamber according to claim 7, characterized in that: The outer side of the top cover box (4) is also equipped with a USB interface (7), a power switch (8), a cooling fan (9) and a 24V power interface (10); the USB interface (7), the power switch (8), the cooling fan (9), the 24V power interface (10), the temperature probe (16) and the Stirling refrigerator (14) are electrically connected.