Cold conduction structure of Stirling cryocooler and Stirling cryocooler

Abstract

The cold conduction structure of the Stirling cryocooler comprises gravity heat pipes (1) and further comprises a convection cavity (2) and heat exchange fins (3) arranged in the convection cavity (2), the gravity heat pipes (1) extend into the convection cavity (2) from the outer side and are connected with the heat exchange fins (3), and the convection cavity (2) is provided with airflow holes communicated with a heat preservation box (12); the cold conduction structure of the Stirling cryocooler is favorable for improving the refrigeration efficiency; the utility model further provides the Stirling cryocooler which adopts the cold conduction structure of the Stirling cryocooler.

Description

Technical Field

[0001] The utility model relates to the technical field of Stirling refrigeration devices, in particular to a Stirling refrigerator cooling structure and a Stirling refrigerator. Background Art

[0002] The Stirling refrigerator is a refrigeration device built based on the Stirling refrigeration principle. It has the advantages of small size, strong refrigeration capacity and high reliability. It is especially important in portable biological refrigerators. How to effectively transfer the cold energy generated by the Stirling refrigerator into the insulated box? Generally, gravity heat pipes are used to introduce the cold energy into the insulated box. However, how to further improve the cooling efficiency or refrigeration efficiency requires further research. This requires further research on the cooling structure of the Stirling refrigerator. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and propose a cooling structure for a Stirling refrigerator, which is conducive to improving the cooling efficiency; and also propose a Stirling refrigerator, which adopts the aforementioned cooling structure for the Stirling refrigerator.

[0004] Compared with the existing technology, the utility model proposes a cooling structure of a Stirling refrigerator, including a gravity heat pipe, a convection cavity, and heat exchange fins arranged in the convection cavity. The gravity heat pipe extends into the convection cavity from the outside and is connected to the heat exchange fins. The convection cavity is provided with an air flow hole connected to the insulation box.

[0005] After adopting the above structure, compared with the prior art, the utility model has the following advantages:

[0006] The present invention is improved by providing a convection cavity connected to the insulation box, and heat exchange fins are provided in the convection cavity, and the gravity heat pipe extends into the convection cavity from the outside and is connected to the heat exchange fins, so that the cold introduced by the gravity heat pipe is exchanged into the convection cavity by the heat exchange fins, and is efficiently transported from the convection cavity to the insulation box, thereby helping to improve the refrigeration efficiency.

[0007] In some embodiments, a convection fan is further included, and the convection fan is used to accelerate convection.

[0008] In some embodiments, the convection cavity adopts a cavity structure arranged in the up and down directions, and the convection fan is arranged at the upper end of the convection cavity.

[0009] In some embodiments, the convection chamber includes a frame and a cover, which are spliced ​​together to form a convection chamber. An opening is provided on the back of the frame for the gravity heat pipe to enter and exit. The frame is used to integrally incorporate a module formed by connecting heat exchange fins and gravity heat pipes, and the gravity heat pipe extends from the opening when incorporated.

[0010] In some embodiments, in the case of a convection fan, the upper end of the cover is provided with a first air flow hole for the convection fan to exchange air flow.

[0011] In some embodiments, a second air flow hole is provided at the lower end of the cover.

[0012] In some embodiments, the gravity heat pipe includes a main pipe and a meandering pipe. The meandering pipe is installed in the heat exchange fin along the up and down direction. The main pipe is connected and communicated with the upper end of the meandering pipe. The main pipe is arranged obliquely upward and extends outside the convection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional schematic diagram of the cooling structure of a Stirling refrigerator.

[0014] Figure 2 This is a three-dimensional schematic diagram of a Stirling refrigerator cooling structure with the cover removed.

[0015] Figure 3 A three-dimensional schematic diagram of a Stirling refrigerator.

[0016] Figure 4 This is a three-dimensional schematic diagram of a Stirling refrigerator with the outer shell removed.

[0017] Figure 5 for Figure 4 A three-dimensional schematic diagram of the accommodating cavity is revealed after the shell of the thermal insulation box is further removed.

[0018] Figure 6 for Figure 5 A three-dimensional schematic diagram after further removing the items in the accommodating cavity.

[0019] Figure 7 A three-dimensional schematic diagram of a Stirling refrigerator showing an exposed overhead base.

[0020] Explanation of the reference numerals: 1-gravity heat pipe, 2-convection chamber, 3-heat exchange fins, 4-convection fan, 5-frame, 6-cover, 7-opening, 8-first air flow hole, 9-second air flow hole, 10-main pipe, 11-meander pipe, 12-insulation box, 13-Stirling machine, 14-containing frame, 15-overhead base, 16-circulation hole, 17-refrigeration head, 18-insulation sealing plug, 19-insulation cotton, 20-shell, 21-shell, 22-article. DETAILED DESCRIPTION

[0021] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0022] like Figures 1 to 7 The figure shows a Stirling refrigerator cooling conduction structure and a Stirling refrigerator, wherein the Stirling refrigerator cooling conduction structure includes a gravity heat pipe 1, a convection cavity 2, and heat exchange fins 3 arranged in the convection cavity 2. The gravity heat pipe 1 extends into the convection cavity 2 from the outside and is connected to the heat exchange fins 3. The convection cavity 2 is provided with air flow holes connected to the insulation box 12. The Stirling refrigerator adopts the Stirling refrigerator cooling conduction structure, specifically, includes a shell 20, an insulation box 12 and a Stirling refrigerator 13. The convection cavity 2 of the Stirling refrigerator cooling conduction structure is connected to the insulation box 12, and the gravity heat pipe 1 of the Stirling refrigerator cooling conduction structure is connected to the cooling head 17 of the Stirling refrigerator 13.

[0023] In this example, the accommodating chamber of the heat preservation box 12, the convection chamber 2, and the Stirling machine 13 are arranged in parallel in the horizontal direction. This structure is compact and easy to manufacture. Figure 4 、 5 As shown, the accommodating cavity is exposed after the housing 21 is removed.

[0024] Further, such as Figure 4 、 5 As shown, the convection chamber 2 is disposed in the thermal insulation box 12. The thermal insulation box 12 is provided with an overhead base 15. The upper side of the overhead base 15 is used to place items 22. The overhead base 15 is connected to the thermal insulation box 12. The overhead base 15 is provided with a horizontal circumferential communication hole, which is connected to the convection chamber 2. This not only achieves higher heat exchange efficiency, but also has a more compact structure.

[0025] In some embodiments, as Figure 5 、 6 As shown, a receiving frame 14 is provided in the receiving cavity. The receiving frame 14 can be configured to be taken in and out of the receiving cavity, and the receiving frame 14 can hold articles 22 .

[0026] In order to further improve the cycle efficiency, Figure 5 、 6 As shown, circulation holes 16 are provided on the circumferential side surfaces and the bottom surface of the receiving frame 14 .

[0027] In some embodiments, as Figure 1 、 2As shown in Figures 5, 6, and 7, the convection chamber 2 includes a frame 5 and a cover 6. The frame 5 and the cover 6 are assembled to form the convection chamber 2. An opening 7 for the gravity heat pipe 1 to enter and exit is provided on the back of the frame 5. The frame 5 is used to integrally house the module formed by connecting the heat exchange fins 3 and the gravity heat pipe 1. When the module is installed, the gravity heat pipe 1 extends from the opening 7. This design facilitates production and assembly.

[0028] In this example, the frame 5 is rectangular, and the cover 6 is also the same frame 5. Of course, it can also be other structures, for example, the cover 6 is a cover plate.

[0029] The frame 5 can be rectangular, square or other shapes.

[0030] In some embodiments, in order to achieve the heat preservation effect, the opening 7 is provided with a heat preservation sealing plug 18, which extends outward along with the gravity heat pipe 1 and is connected to the heat preservation cotton 19 on the cooling head 17 of the Stirling machine 13, thereby forming a seal and heat preservation measure, or, as Figure 4 、 5 As shown, the thermal insulation cotton 19 extends from one side of the refrigeration head 17 to one side of the opening 7 and is connected to the thermal insulation sealing plug 18.

[0031] In some embodiments, as Figure 1 、 2 As shown in , 5, 6, and 7, a convection fan 4 is also included, which is used to accelerate convection.

[0032] In some embodiments, as Figure 2 As shown, the convection chamber 2 adopts a cavity structure arranged in the up-down direction, and the convection fan 4 is arranged at the upper end of the convection chamber 2. In this way, there is a larger airflow exchange space, which is conducive to the convection fan 4 to play a role.

[0033] In some embodiments, as Figure 1 As shown, for the case of having a convection fan 4, the upper end of the cover 6 is provided with a first air flow hole 8 for exchanging airflow for the convection fan 4. In this way, the convection chamber 2 is communicated with the heat preservation box 12 through the first air flow hole 8.

[0034] In some embodiments, as Figure 1 As shown, the lower end of the cover portion 6 is provided with a second air flow hole 9. Thus, together with the first air flow hole 8, the convection chamber 2 forms an efficient convection channel.

[0035] In some embodiments, as Figure 2 As shown, the gravity heat pipe 1 includes a main pipe 10 and a meandering pipe 11. The meandering pipe 11 is installed in the heat exchange fin 3 along the vertical direction. The main pipe 10 is connected and communicated with the upper end of the meandering pipe 11. The main pipe 10 is arranged obliquely upward and extends outside the convection chamber 2. This achieves higher efficiency.

[0036] In this example, if Figure 2 As shown, there are two groups of gravity heat pipes 1, and correspondingly, there are two main pipes 10 and two meandering pipes 11. The two meandering pipes 11 are arranged horizontally and side by side in the heat exchange fins 3, providing sufficient heat exchange area.

[0037] like Figure 1 As shown, the cooling structure of the Stirling refrigerator forms a modular structure, which not only improves the cooling efficiency but also provides great production convenience.

[0038] When understanding the present disclosure, if necessary, the above structure can refer to other embodiments / appendices. Figure 1 And understand, no further elaboration here.

[0039] The above description is merely an illustrative embodiment of the present invention, and therefore any equivalent changes or modifications made according to the structure, features and principles described in the scope of protection of the present invention are included in the scope of protection of the present invention.

Claims

1. A Stirling refrigerator cooling structure, comprising a gravity heat pipe (1), characterized in that: The invention also includes a convection chamber (2) and heat exchange fins (3) provided in the convection chamber (2); a gravity heat pipe (1) extends from the outside into the convection chamber (2) and is connected to the heat exchange fins (3); and the convection chamber (2) is provided with an air flow hole communicating with the heat preservation box (12).

2. The cooling conduction structure of a Stirling refrigerator according to claim 1, wherein: The utility model further comprises a convection fan (4), which is used for accelerating convection.

3. The cooling conduction structure of a Stirling refrigerator according to claim 2, wherein: The convection cavity (2) adopts a cavity structure arranged in the up-down direction, and the convection fan (4) is arranged at the upper end of the convection cavity (2).

4. The cooling conduction structure of a Stirling refrigerator according to claim 1 or 3, wherein: The convection chamber (2) comprises a frame (5) and a cover (6). The frame (5) and the cover (6) are spliced ​​together to form the convection chamber (2). An opening (7) for the gravity heat pipe (1) to enter and exit is provided on the back of the frame (5). The frame (5) is used to integrally house a module formed by connecting the heat exchange fins (3) and the gravity heat pipe (1). When the module is housed, the gravity heat pipe (1) extends from the opening (7).

5. The cooling conduction structure of a Stirling refrigerator according to claim 4, wherein: In the case of having a convection fan (4), the upper end of the cover (6) is provided with a first air flow hole (8) for the convection fan (4) to exchange air flow.

6. The cooling conduction structure of a Stirling refrigerator according to claim 4, wherein: A second air flow hole (9) is provided at the lower end of the cover portion (6).

7. The cooling conduction structure of a Stirling refrigerator according to claim 1, wherein: The gravity heat pipe (1) comprises a main pipe (10) and a meandering pipe (11). The meandering pipe (11) is installed in the heat exchange fin (3) in the up-down direction. The main pipe (10) is connected and communicated with the upper end of the meandering pipe (11). The main pipe (10) is arranged obliquely upward and extends outside the convection chamber (2).

8. A Stirling refrigerator, comprising an insulation box (12) and a Stirling refrigerator (13), characterized in that: It also includes the Stirling refrigerator cooling structure according to any one of claims 1 to 7, wherein the convection cavity (2) of the Stirling refrigerator cooling structure is connected to the insulation box (12), and the gravity heat pipe (1) of the Stirling refrigerator cooling structure is connected to the cooling head (17) of the Stirling machine (13).

9. The Stirling refrigerator according to claim 8, wherein: The accommodating chamber of the heat preservation box (12), the convection chamber (2), and the Stirling machine (13) are arranged in parallel in sequence along the horizontal direction.

10. The Stirling refrigerator according to claim 8 or 9, characterized in that: The convection chamber (2) is arranged in the heat preservation box (12). The heat preservation box (12) is provided with an overhead base (15). The upper side of the overhead base (15) is used to place articles (22). The overhead base (15) is connected to the heat preservation box (12). A communication hole is provided in the horizontal circumference of the overhead base (15). The communication hole is connected to the convection chamber (2).

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