Heat collecting head assembly and stirling refrigeration device

Abstract

The utility model discloses a heat collecting head assembly and stirling refrigerating plant, including a plurality of sets of heat collecting module, the heat collecting module includes connecting cover no.

Description

Technical Field

[0001] This utility model relates to a refrigeration device, and more specifically, to a heat collector assembly, and also to a Stirling refrigeration device having the heat collector assembly. Background Technology

[0002] A Stirling refrigeration unit, also known as a Stirling refrigerator, is a mechanical refrigeration machine that operates based on the Stirling cycle principle. During the refrigeration process, the heat collector assembly of a Stirling refrigeration unit achieves cooling by lowering its temperature and exchanging heat with the heat collector assembly, thus delivering a cooling output.

[0003] Multiple heat exchange tubes are typically installed at the heat collector head of a Stirling refrigeration unit. These heat exchange tubes improve heat exchange efficiency, thereby increasing the cooling efficiency of the equipment. The ends of the heat exchange tubes are usually fixed to other components of the heat collector module by welding, and the welded joints are sealed.

[0004] To increase the heat exchange area of ​​the heat exchange tubes and further improve the cooling efficiency, it is usually necessary to extend the length of the heat exchange tubes. However, after the length of the heat exchange tubes is extended, the stability of the welded joints of the heat exchange tubes will decrease, affecting the strength and stability of the heat exchange tubes.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat collector assembly and a Stirling refrigeration device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A heat collection head assembly includes several sets of heat collection modules. Each heat collection module includes a first connecting cover, a second connecting cover, and several heat exchange tubes. The first connecting cover and the second connecting cover are respectively installed on the Stirling engine body. The two ends of each heat exchange tube are respectively fixedly connected to the first connecting cover and the second connecting cover. The first connecting cover is integrally connected to an arc-shaped connecting seat. The arc-shaped connecting seat has a connecting cavity that communicates with the inner cavity of the first connecting cover. The arc-shaped connecting seat has a connecting hole. The first end of each heat exchange tube is inserted into the connecting hole and is sealed and fixedly connected to the connecting hole.

[0009] The present invention is further configured such that the first end of the heat exchange tube is welded and fixed to the connecting hole to achieve a seal.

[0010] The present invention is further configured such that the outward end of the connecting hole forms a flared portion, and an annular gap is formed between the outer periphery of the heat exchange tube and the flared portion, the annular gap being used to accommodate solder.

[0011] The present invention is further configured such that one end of the connecting hole is connected to the connecting cavity; a positioning step portion protruding inward is formed in the connecting hole, and the first end of the heat exchange tube is pressed against and positioned by the positioning step portion.

[0012] The present invention is further configured such that a positioning hole is formed on the side of the connecting cavity opposite to the connecting hole, the positioning hole is adapted to the first end of the heat exchange tube, and the first end of the heat exchange tube is inserted into the positioning hole.

[0013] The present invention is further configured such that a positioning bottom surface is formed inside the positioning hole, and the first end of the heat exchange tube is positioned against the positioning bottom surface.

[0014] The present invention is further configured such that a connecting groove is provided on the outer periphery of the first end of the heat exchange tube, the connecting groove penetrates the inner and outer walls of the heat exchange tube, and the position of the connecting groove is opposite to and connected to the connecting cavity.

[0015] The present invention is further configured such that the connecting cover 2 is integrally connected to the arc-shaped connecting seat 2, and a partition is connected between the arc-shaped connecting seat 1 and the arc-shaped connecting seat 2, the partition separating the heat exchange tube from the connecting cover 1 and the connecting cover 2 on both sides.

[0016] The present invention is further configured such that the heat collection module is provided in four groups and arranged in a ring array; the first connecting cover in the heat collection module is located on the outer side relative to the second connecting cover.

[0017] This utility model also provides a Stirling refrigeration device, including the heat collection head assembly as described above, as well as a Stirling engine body and a drive motor; the heat collection head assembly is installed on the Stirling engine body, and the drive motor is used to drive the Stirling engine body to operate.

[0018] In summary, this utility model has the following beneficial effects:

[0019] Multiple heat exchange tubes can be used to achieve refrigeration and heat exchange, which can extend the flow path length of the heat exchange medium when it flows through the heat exchange tubes, increase the heat exchange area of ​​the heat collection module, and thus improve the refrigeration efficiency of the refrigeration device.

[0020] By bending the heat exchange tube into three sections, the two ends of the heat exchange tube are welded and fixed to the first and second arc-shaped connecting seats, respectively. The end portion of the heat exchange tube extends into the first arc-shaped connecting seat, thereby improving the installation stability of the heat exchange tube. By forming a positioning step in the connecting hole, the first end of the heat exchange tube is pressed against the positioning step to maintain the installation stability of the heat exchange tube and achieve stable positioning.

[0021] An annular gap is formed between the outer circumference of the heat exchange tube and the flared part. During the welding process, the weld can be partially embedded in the annular gap, which can stably accommodate the weld, maintain good connection strength, and maintain a good sealing condition.

[0022] In addition, by cooperating with the positioning hole and the connecting hole, the positioning hole can be extended at the connecting hole, which can improve the stability of the insertion of the heat exchange tube and the arc-shaped connecting seat. With the cooperation of sealing welding, the heat exchange tube can be installed and fixed. Attached Figure Description

[0023] Figure 1 This is a perspective view of the heat collector assembly in Embodiment 1;

[0024] Figure 2 This is a perspective view of the heat collection module in Example 1;

[0025] Figure 3 This is a perspective view of the heat exchange tube in Example 1;

[0026] Figure 4 This is a cross-sectional view of the heat exchange tube and the arc-shaped connecting seat in Embodiment 1;

[0027] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6 This is an exploded structural diagram of the heat exchange tube and connecting hole in Example 2;

[0029] Figure 7 This is a schematic diagram of the heat exchange tube and connecting hole in Example 3;

[0030] Figure 8 This is an exploded structural diagram of the heat exchange tube and connecting hole in Example 3;

[0031] Figure 9 This is a perspective view of the Stirling refrigeration device in Example 1.

[0032] Reference numerals: 1. Heat collector head assembly; 100. Connecting cover 1; 2. Arc-shaped connecting seat 1; 21. Connecting cavity 211; Connecting hole 212; Positioning step 213; Flared part 214; Annular gap 215; Positioning hole 216; Positioning bottom surface 217; 3. Connecting cover 2; 31. Arc-shaped connecting seat 2; 4. Heat exchange tube 4; First end 41; Connecting groove 411; Second end 42; Intermediate connecting section 43; Partition plate 5; Stirling engine body 6; Drive motor 7. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] This embodiment discloses a heat collector head assembly, referring to... Figures 1-4 As shown, the heat exchanger is installed on the Stirling engine body 6 and serves as a heat exchanger. In this embodiment, the heat collection head assembly can achieve cooling.

[0036] Reference Figure 1 As shown, the heat collection head assembly of this embodiment includes four sets of heat collection modules 100, which are arranged in a ring array to form a uniform structure. Each heat collection module 100 includes a first connecting cover 2, a second connecting cover 3, and several heat exchange tubes 4. The first connecting cover 2 and the second connecting cover 3 are respectively installed on the Stirling engine body 6. The inner cavities of the first connecting cover 2 and the second connecting cover 3 are connected to the cylinder block of the Stirling engine body 6, allowing for the flow of heat exchange medium.

[0037] The two ends of the heat exchange tube 4 are fixedly connected to the connecting cover 2 and the connecting cover 3, respectively, and the heat exchange medium can achieve cooling at the heat collection module 100. Moreover, since the heat exchange tube 4 has a large heat exchange area, extending the length of the pipe can improve the cooling efficiency of the heat collection head assembly.

[0038] Reference Figure 2 , Figure 3 As shown, connecting cover 1 2 is integrally connected to arc-shaped connecting seat 1 21, and connecting cover 2 3 is integrally connected to arc-shaped connecting seat 2 31. The four are arranged in a ring array on the outer periphery and the ring array is arranged on the inner periphery. The heat exchange tube 4 has a first end 41 and a second end 42, and an intermediate connecting section 43 is formed in the middle of the heat exchange tube 4, forming a three-section bent structure.

[0039] The heat exchange tube 4 has a first end 41 and a second end 42. The first end 41 is fixed to the arc-shaped connecting seat 21, which can support the heat exchange tube 4. The second end 42 is fixed to the arc-shaped connecting seat 31, which can provide another support for the heat exchange tube 4, thereby maintaining the installation stability of the heat exchange tube 4.

[0040] Both the arc-shaped connector 1 (21) and the arc-shaped connector 2 (31) are arc-shaped with an arc angle of approximately 90°. During installation, the four arc-shaped connectors 1 (21) are assembled in a roughly ring-shaped structure, and the four arc-shaped connectors 2 (31) are also assembled in a roughly ring-shaped structure, forming two rings distributed on the inner and outer circumferences.

[0041] Reference Figure 1 , Figure 2 As shown, a partition 5 is connected between the arc-shaped connecting seat 1 21 and the arc-shaped connecting seat 2 31, and the partition 5 separates the heat exchange tube 4 from the connecting cover 1 2 and the connecting cover 2 3 on both sides.

[0042] The first end 41 of the heat exchange tube 4 is welded and fixed to the arc-shaped connecting seat 21 and can communicate with each other; the second end 42 of the heat exchange tube 4 is also welded and fixed to the arc-shaped connecting seat 31 and can also communicate with each other. The heat exchange medium can communicate with the inner cavity of the connecting cover 2, the inner cavity of the arc-shaped connecting seat 21, the heat exchange tube 4, the inner cavity of the arc-shaped connecting seat 31 and the inner cavity of the connecting cover 3, so as to realize the flow of the heat exchange medium.

[0043] To improve the connection strength of the heat exchange tube 4, the first end 41 of the heat exchange tube 4 can be inserted into the arc-shaped connecting seat 21, thereby improving the installation stability of the heat exchange tube 4.

[0044] Reference Figures 4-6 As shown, a connecting cavity 211 is provided inside the arc-shaped connecting seat 21. The connecting cavity 211 is distributed along the trend of the arc-shaped connecting seat 21. The connecting cavity 211 is connected to the inner cavity of the connecting cover 2. The heat exchange tube 4 and the inner cavity of the connecting cover 2 are connected through the connecting cavity 211.

[0045] A connection hole 212 is provided on the outer side of the arc-shaped connecting seat 21. One end of the connection hole 212 is open to the outside of the arc-shaped connecting seat 21, and the other end is connected to the connection cavity 211. The first end 41 of the heat exchange tube 4 is inserted into the connection hole 212 and is sealed and fixed to the connection hole 212.

[0046] Specifically, the first end 41 of the heat exchange tube 4 is welded and fixed to the connecting hole 212, and the welding achieves a seal between the first end 41 of the heat exchange tube 4 and the connecting hole 212. Additionally, a flared portion 214 is formed at the outward-facing end of the connecting hole 212. After the first end 41 of the heat exchange tube 4 is inserted into the connecting hole 212, an annular gap 215 is formed between the outer circumference of the heat exchange tube 4 and the flared portion 214. During welding, the weld material can partially sink into the annular gap 215, stably accommodating the weld material, maintaining good connection strength, and ensuring a good seal.

[0047] The embodiments also disclose a Stirling refrigeration device, with reference to Figure 9 As shown, the device includes the aforementioned heat collector assembly, as well as the Stirling engine body 6 and the drive motor 7. The heat collector assembly is mounted on the Stirling engine body 6, and the drive end of the drive motor 7 is connected to the rotating shaft of the Stirling engine body 6. The drive motor 7 can drive the Stirling engine body 6 to operate, thereby achieving cooling at the heat collector module 100.

[0048] Example 2

[0049] This embodiment discloses a heat collector head assembly, which is based on Embodiment 1 and further refers to... Figure 5 , Figure 6 Please provide a detailed explanation.

[0050] To maintain the installation stability of the first end 41 of the heat exchange tube 4 and the arc-shaped connecting seat 21, a positioning step 213 protruding inward is formed inside the connecting hole 212. During installation, the first end 41 of the heat exchange tube 4 and the positioning step 213 press against each other for positioning, thereby maintaining the installation stability of the heat exchange tube 4 and achieving stable positioning. Moreover, the first end 41 of the heat exchange tube 4 is inserted into the connecting hole 212 to a depth of more than 0.8 cm to maintain the installation stability of the heat exchange tube 4.

[0051] By stably inserting and welding the heat exchange tube 4 at its first end 41, the heat exchange tube 4 can be fixed in order to maintain the overall stability and installation strength performance of the heat exchange tube 4.

[0052] The second end 42 of the heat exchange tube 4 is also connected to the arc-shaped connecting seat 31 by welding. The two ends of the heat exchange tube 4 are supported by the first end 41, which can improve the stability of the heat exchange tube 4. In order to improve the connection stability of the second end 42 of the heat exchange tube 4, the second end 42 of the heat exchange tube 4 can also be partially inserted into the arc-shaped connecting seat 31, which is consistent with the insertion structure of the first end 41 of the heat exchange tube 4.

[0053] In addition, heat exchange fins can be installed between each heat exchange tube 4. The fins are fixed to multiple adjacent heat exchange tubes 4 respectively, so that the heat exchange tubes 4 in the same heat collection module 100 can be connected and supported to each other, so that each heat exchange tube 4 can be connected to form a whole, thereby improving the stability of the installation structure of the heat exchange tube 4.

[0054] Example 3

[0055] This embodiment discloses a heat collector head assembly, which is based on Embodiment 1 and further refers to... Figure 7 , Figure 8 A detailed explanation follows. In some scenarios, it is necessary to extend the length of heat exchange tube 4 to increase its heat exchange area and the length of the heat exchange channel, thereby improving the cooling efficiency.

[0056] As the length of heat exchange tube 4 is extended, the connection strength between heat exchange tube 4 and arc-shaped connecting seat 21 needs to be further increased. (Refer to...) Figure 7 , Figure 8As shown, a positioning hole 216 is formed on the side of the connecting cavity 211 facing away from the connecting hole 212. The positioning hole 216 is adapted to the first end 41 of the heat exchange tube 4. The positioning hole 216 and the connecting hole 212 are coaxial. The length of the connecting hole 212 can be extended through the positioning hole 216.

[0057] During installation, the first end 41 of the heat exchange tube 4 is inserted into the connection hole 212, then through the connection cavity 211, and finally into the positioning hole 216. The positioning hole 216 extends the insertion length of the first end 41 of the heat exchange tube 4, thereby providing good support and installation stability for the heat exchange tube 4.

[0058] A positioning bottom surface 217 is formed in the positioning hole 216. The first end 41 of the heat exchange tube 4 is positioned against the positioning bottom surface 217 to maintain the installation stability of the first end 41 of the heat exchange tube 4.

[0059] In addition, a connecting groove 411 is provided on the outer periphery of the first end 41 of the heat exchange tube 4. The connecting groove 411 penetrates the inner and outer walls of the heat exchange tube 4, and the position of the connecting groove 411 is opposite to and connected to the connecting cavity 211. The first end 41 of the heat exchange tube 4 is connected to the connecting groove 411, and the connecting cavity 211 is connected through the connecting groove 411, so that the heat exchange medium can flow through the connecting groove 411.

[0060] After the first end 41 of the heat exchange tube 4 is installed, the heat exchange tube 4 is welded and fixed to the connection hole 212 of the arc-shaped connecting seat 21, forming an annular weld state to achieve a sealed connection and fixation of the first end 41 of the heat exchange tube 4.

[0061] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heat collector head assembly, characterized in that, The device includes several sets of heat collection modules (100). Each heat collection module (100) includes a first connecting cover (2), a second connecting cover (3), and several heat exchange tubes (4). The first connecting cover (2) and the second connecting cover (3) are respectively installed on the Stirling engine body (6). The two ends of the heat exchange tubes (4) are respectively fixedly connected to the first connecting cover (2) and the second connecting cover (3). The first connecting cover (2) is integrally connected to an arc-shaped connecting seat (21). The arc-shaped connecting seat (21) has a connecting cavity (211) inside, which communicates with the inner cavity of the first connecting cover (2). The arc-shaped connecting seat (21) has a connecting hole (212). The first end (41) of the heat exchange tube (4) is inserted into the connecting hole (212) and is sealed and fixedly connected to the connecting hole (212).

2. The heat collector assembly according to claim 1, characterized in that, The first end (41) of the heat exchange tube (4) is welded and fixed to the connecting hole (212) to achieve a seal.

3. The heat collector assembly according to claim 2, characterized in that, The connecting hole (212) has an outward-facing end forming a flared portion (214), and an annular gap (215) is formed between the outer periphery of the heat exchange tube (4) and the flared portion (214), which is used to accommodate solder.

4. The heat collector assembly according to claim 1, characterized in that, One end of the connecting hole (212) is connected to the connecting cavity (211); a positioning step (213) protruding inward is formed in the connecting hole (212), and the first end (41) of the heat exchange tube (4) is pressed against the positioning step (213) for positioning.

5. The heat collector assembly according to claim 1, characterized in that, A positioning hole (216) is formed on the side of the connecting cavity (211) facing away from the connecting hole (212). The positioning hole (216) is adapted to the first end (41) of the heat exchange tube (4). The first end (41) of the heat exchange tube (4) is inserted into the positioning hole (216).

6. The heat collector assembly according to claim 5, characterized in that, A positioning bottom surface (217) is formed inside the positioning hole (216), and the first end (41) of the heat exchange tube (4) is positioned against the positioning bottom surface (217).

7. The heat collector assembly according to claim 5, characterized in that, A connecting groove (411) is provided on the outer periphery of the first end (41) of the heat exchange tube (4). The connecting groove (411) penetrates the inner and outer walls of the heat exchange tube (4). The position of the connecting groove (411) is opposite to and connected to the connecting cavity (211).

8. The heat collector assembly according to claim 1, characterized in that, The second connecting cover (3) is integrally connected to the second arc-shaped connecting seat (31). A partition (5) is connected between the first arc-shaped connecting seat (21) and the second arc-shaped connecting seat (31). The partition (5) separates the heat exchange tube (4) from the first connecting cover (2) and the second connecting cover (3) on both sides.

9. The heat collector assembly according to claim 1, characterized in that, The heat collection module (100) is provided in four groups and arranged in a ring array; the connecting cover one (2) in the heat collection module (100) is located on the outer side relative to the connecting cover two (3).

10. A Stirling refrigeration device, characterized in that, The device includes the heat collection head assembly as described in any one of claims 1-9, and further includes a Stirling engine body (6) and a drive motor (7); the heat collection head assembly is mounted on the Stirling engine body (6), and the drive motor (7) is used to drive the Stirling engine body (6) to operate.

Images