Stirling refrigeration engine system and heat exchange system thereof

Abstract

The application discloses a Stirling refrigeration engine system and a heat exchange system thereof, which comprises a Stirling engine body, wherein the Stirling engine body comprises a refrigeration head, the refrigeration head comprises a plurality of refrigeration components, the refrigeration components comprise a cover body one, a cover body two and a plurality of refrigeration capillary tubes, the cover body one is connected with a hot cylinder of the Stirling engine body, the cover body two is connected with a cold cylinder of the Stirling engine body, and the two ends of the refrigeration capillary tubes are connected between the cover body one and the cover body two respectively, the Stirling refrigeration engine system further comprises a rotary driver, a rotary output shaft of the rotary driver is connected with a rotating shaft of the Stirling engine body, and the rotary driver is used for driving the Stirling engine body to work, and the refrigeration capillary tubes can be cooled and refrigerated. The Stirling engine body can be driven to generate a Stirling cooling cycle by the electric rotary driver, working gas forms a Stirling refrigeration cycle in the Stirling engine body, and high-speed refrigeration is achieved by using the working gas to form a closed cycle to do work.

Description

Technical Field

[0001] This invention relates to refrigeration equipment, and more specifically, to a Stirling refrigeration engine system, and also to a heat exchange system for a Stirling refrigeration engine. Background Technology

[0002] Stirling refrigeration equipment is based on the reverse Stirling cycle, achieving refrigeration through heat exchange via isothermal compression and isochoric expansion of the gas. During the refrigeration process, Stirling refrigeration equipment can reach very low temperatures. However, this process puts significant pressure on the heat exchange efficiency of the cooling capacity, potentially leading to wasted cooling capacity. Furthermore, the significant heat generated internally during refrigeration, if not dissipated effectively, can also affect the normal operation of the equipment.

[0003] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a Stirling refrigeration engine system and its heat exchange system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A Stirling engine refrigeration system includes a Stirling engine body, the Stirling engine body including a refrigeration head, the refrigeration head including a plurality of refrigeration components, the refrigeration components including a first shroud, a second shroud and a plurality of refrigeration capillaries, the first shroud being connected to the hot cylinder of the Stirling engine body, the second shroud being connected to the cold cylinder of the Stirling engine body, the two ends of the refrigeration capillaries being respectively connected between the first shroud and the second shroud, and also including a rotary actuator, the rotary actuator having a rotary output shaft connected to the rotating shaft of the Stirling engine body for driving the Stirling engine body to work, and the refrigeration capillaries being capable of cooling.

[0007] The present invention is further configured such that the cover body is integrally connected to the connecting seat, the connecting seat is provided with a plurality of connecting ports, the cover body is integrally connected to the connecting seat, the connecting seat is provided with a plurality of connecting ports, the connecting ports are one-to-one corresponding to the connecting ports and connected through a cooling capillary tube.

[0008] The present invention is further configured such that both the first connecting seat and the second connecting seat are arc-shaped structures, and in each group of refrigeration components, each first connecting seat and each second connecting seat form a ring.

[0009] The present invention is further configured such that the refrigeration assembly includes a plurality of heat exchange fins, the heat exchange fins being mounted outside the refrigeration capillary tube.

[0010] The present invention also provides a heat exchange system for a Stirling refrigeration engine, including the Stirling refrigeration engine system as described above, and further including a heat exchange container, wherein the refrigeration head of the Stirling refrigeration engine system extends into the heat exchange container, and the heat exchange container has a circulation port one and a circulation port two for the circulation of heat exchange medium.

[0011] The invention is further configured to include a cooling output module, which includes a cooling heat exchanger and a refrigeration circulation pump. The cooling heat exchanger is connected to a first circulation port with an output pipe, and the cooling heat exchanger is connected to a second connection port with a return pipe. The output pipe is equipped with a refrigeration circulation pump, which is used to pump the heat exchange medium for circulation.

[0012] The present invention is further configured such that the cold energy heat exchanger includes a cold energy output section, which is used to output cold energy.

[0013] The present invention is further configured such that the cooling head of the Stirling refrigeration engine system is arranged downwards, a spiral guide vane is installed between the inner wall of the heat exchange container and the cooling head, and the second circulation interface and the first circulation interface are respectively located on the upper and lower sides of the heat exchange container.

[0014] The invention is further configured to include a heat dissipation module, which includes a heat dissipation circulation pump, a condenser radiator, and a fan. The Stirling engine body has a heat exchange channel one. The heat dissipation circulation pump is connected to the heat exchange channel one of the Stirling engine body through a connecting pipe one. The heat dissipation circulation pump is connected to the condenser radiator through a connecting pipe two. The condenser radiator is connected to the heat exchange channel one of the Stirling engine body through a connecting pipe three. The fan is used to dissipate heat from the condenser radiator.

[0015] The invention is further configured to include a fourth connecting pipe and a fifth connecting pipe, wherein the rotary drive is a motor and has a second heat exchange channel, the second heat exchange channel being connected to the third connecting pipe via the fourth connecting pipe, and the second heat exchange channel being connected to the first connecting pipe via the fifth connecting pipe.

[0016] In summary, the present invention has the following beneficial effects:

[0017] An electrically driven rotary actuator drives the Stirling engine to generate a Stirling cooling cycle, utilizing the principle of hydrogen expansion to achieve cooling through the reciprocating motion of the engine piston. The working gas forms a Stirling cooling cycle within the Stirling engine, achieving high-speed cooling by utilizing the closed-loop circulation of the working gas.

[0018] By employing a multi-capillary cooling head, the external heat exchange area can be increased, thereby improving the overall cooling output efficiency of the system. The multi-tube capillary structure also increases the heat exchange area of ​​the cooling components, further enhancing the overall cooling output efficiency of the system.

[0019] By setting up a heat exchange container, the cooling head can be inserted into the heat exchange container, and the heat exchange container can increase the heat exchange contact area and contact time between the cooling head and the heat exchange medium, thereby improving the efficiency of cold energy transfer in the refrigeration process. Attached Figure Description

[0020] Figure 1 This is a perspective view of a heat exchange system for a Stirling refrigeration engine in this embodiment.

[0021] Figure 2 This is a top view of a heat exchange system for a Stirling refrigeration engine in this embodiment;

[0022] Figure 3 This is a front view of a heat exchange system for a Stirling refrigeration engine in this embodiment;

[0023] Figure 4 This is a schematic diagram of the structure of the cooling head and heat exchange container in this embodiment;

[0024] Figure 5 This is a perspective view of the cooling head in this embodiment;

[0025] Figure 6 This is a schematic diagram of the cooling component in this embodiment;

[0026] Figure 7 This is a perspective view of the second cover in this embodiment;

[0027] Figure 8 This is a perspective view of the cover body one in this embodiment;

[0028] Figure 9 This is a schematic diagram of the structure of the cooling output module and the heat exchange container in this embodiment.

[0029] Reference numerals: 1. Stirling engine body; 2. Rotary actuator; 3. Heat exchange container; 30. Cover plate; 31. Spiral guide vane; 32. Spiral flow channel; 33. Circulation interface one; 34. Circulation interface two; 4. Cooling circulation pump; 41. Connecting pipe one; 42. Connecting pipe two; 43. Connecting pipe three; 44. Connecting pipe four; 45. Connecting pipe five; 5. Radiator; 6. Fan; 7. Working gas storage bottle; 8. Cooling head; 80. Cooling component; 81. Cooling capillary tube; 82. Cover one; 821. Connecting seat one; 822. Connecting port one; 83. Cover two; 831. Connecting seat two; 832. Connecting port two; 834. Heat exchange fins; 9. Cooling output module; 91. Cooling heat exchanger; 92. Cooling circulation pump; 93. Return pipe; 94. Output pipe; 95. Cooling output section. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This embodiment discloses a Stirling refrigeration engine system, referring to... Figures 1-9 As shown, it includes a Stirling engine body 1 and a rotary driver 2. The rotary driver 2 is an electric motor. The rotary output shaft of the rotary driver 2 is connected to the rotating shaft of the Stirling engine body 1. The rotary driver 2 can drive the Stirling engine body 1 to work, drive the Stirling refrigeration cycle, and achieve refrigeration.

[0032] Reference Figures 3-6 As shown, the Stirling engine body 1 includes a cooling head 8, the cooling head 8 includes several cooling components 80, and the cooling components 80 include a first cover 82, a second cover 83 and several cooling capillaries 81.

[0033] Cover 1 82 is connected to the hot cylinder of Stirling engine body 1, that is, connected to the piston cylinder of Stirling engine body 1; Cover 2 83 is connected to the cold cylinder of Stirling engine body 1, that is, connected to the regenerator and cooler of Stirling engine body 1; the two ends of the refrigeration capillary tube 81 are respectively connected between Cover 1 82 and Cover 2 83. Stirling engine body 1 is filled with working gas, which can form a Stirling refrigeration cycle in Stirling engine body 1, and thus achieve cooling at the refrigeration capillary tube 81 of the refrigeration head 8.

[0034] In this embodiment, the working gas is hydrogen. The high-pressure storage bottle is connected to the working gas flow channel inside the Stirling engine body 1. The reciprocating motion of the engine piston is used to achieve cooling by utilizing the principle of hydrogen expansion. The engine adopts a crank-connecting rod mechanism to drive two pistons and a four-cylinder series structure. The working gas flows back and forth in cavities such as the temperature control chamber, cooler, regenerator, heat exchanger, and refrigeration chamber. The heat exchange between high and low temperatures is used as a medium to form a closed-loop cycle to achieve high-speed cooling.

[0035] Reference Figures 5-7 As shown, a first cover 82 is integrally connected to a first connecting seat 821, which has several first connecting ports 822. A second cover 83 is integrally connected to a second connecting seat 831, which also has several second connecting ports 832. The first connecting ports 822 and the second connecting ports 832 correspond one-to-one and are connected via a refrigeration capillary tube 81. The refrigeration capillary tube 81 has a smaller diameter and a longer length, which increases the external heat exchange area and thus improves the overall system's cooling output efficiency. The multi-tube refrigeration capillary tube 81 structure also increases the heat exchange area of ​​the refrigeration component 80, further enhancing the overall system's cooling output efficiency.

[0036] In this embodiment, both connecting seat 1 821 and connecting seat 2 831 have an arc-shaped structure. Considering that the Stirling engine body 1 in this embodiment adopts a four-cylinder structure, the arc of each connecting seat 1 821 and connecting seat 2 831 is approximately 90°. In each group of refrigeration components 80, each connecting seat 1 821 and each connecting seat 2 831 form a ring, allowing the entire refrigeration head 8 to form a near-cylindrical structure, with each refrigeration capillary tube 81 distributed in a roughly circumferential array.

[0037] Furthermore, to improve heat exchange efficiency, the refrigeration assembly 80 also includes several heat exchange fins 84, which are installed outside the refrigeration capillary tubes 81. The heat exchange fins 84 are installed on the outside of each refrigeration capillary tube 81, forming a multi-fin structure, which can further increase the heat exchange area of ​​the refrigeration head 8 and improve the refrigeration efficiency.

[0038] This embodiment also provides a heat exchange system for a Stirling refrigeration engine, including the Stirling refrigeration engine system in the above embodiment. Using the Stirling refrigeration engine system as a cold source, the generated cold energy can be circulated and output through external heat exchange components.

[0039] Reference Figures 1-4 As shown, the heat exchange system of the Stirling refrigeration engine also includes a heat exchange container 3. The cooling head 8 of the Stirling refrigeration engine system extends into the heat exchange container 3, which is filled with a liquid heat exchange medium. Through the circulation of the heat exchange medium, the cooling output can be achieved.

[0040] Reference Figure 4 As shown, the cooling head 8 of the Stirling refrigeration engine system is positioned downwards, and the heat exchange container 3 is located below the Stirling engine body 1. The cooling head 8 extends into the interior of the heat exchange container 3 through the cover plate 30 on top of the heat exchange container 3, allowing heat exchange between the cooling head 8 and the heat exchange medium within the inner cavity of the heat exchange container 3. The heat exchange container 3 has a first circulation port 33 and a second circulation port 34, which are used for the flow of the heat exchange medium, thereby enabling the output of cooling capacity.

[0041] In this embodiment, ethylene glycol is used as the medium in the heat exchange container 3 to adapt to the low-temperature refrigeration environment.

[0042] In this embodiment, a cooling output module 9 is also included. The cooling output module 9 includes a cooling heat exchanger 91 and a refrigeration circulation pump 92. An output pipe 94 is connected between the cooling heat exchanger 91 and the circulation interface 33. A return pipe 93 is connected between the cooling heat exchanger 91 and the connection port 832. The refrigeration circulation pump 92 is installed on the output pipe 94.

[0043] When the refrigeration circulation pump 92 is working, the heat exchange medium can flow out from the circulation port 33 of the heat exchange container 3, pass through the refrigeration circulation pump 92, and then pass through the cold energy heat exchanger 91 to cool down the cold energy heat exchanger 91. Then it flows back from the cold energy heat exchanger 91 to the circulation port 34, and finally flows back into the heat exchange container 3 to form a cycle.

[0044] The cold energy heat exchanger 91 has an inlet pipe that is connected to the flow channel of the heat exchange medium. In addition, the cold energy heat exchanger 91 includes a cold energy output section 95, which is used to output cold energy. The cold energy output section 95 serves as the output end for refrigeration. The heat exchange structure can be selected according to the requirements. For example, the cold energy output section 95 can use a heat exchange pipe to exchange heat using liquid, or it can use air cooling for heat exchange.

[0045] Furthermore, to improve the heat exchange efficiency of the cooling head 8 within the heat exchange container 3, the heat exchange container 3 can be configured as a cylindrical structure adapted to the cooling head 8. The heat exchange container 3 is fitted over the cooling head 8, forming an annular chamber between the cooling head 8 and the inner wall of the heat exchange container 3. A spiral guide vane 31 is installed between the inner wall of the heat exchange container 3 and the cooling head 8. The spiral guide vane 31 divides the annular chamber between the cooling head 8 and the inner wall of the heat exchange container 3 into a spiral flow channel, forming a top-to-bottom spiral flow. Additionally, circulation interface two 34 and circulation interface one 33 are located on the upper and lower sides of the heat exchange container 3, respectively. In this embodiment, four circulation interfaces two 34 are evenly distributed around the outer periphery of the heat exchange container 3, and one circulation interface one 33 is provided.

[0046] In addition, the heat exchange system of the Stirling refrigeration engine in this embodiment also includes a heat dissipation module, which includes a heat dissipation circulation pump 4, a condenser radiator 5 and a fan 6. The heat dissipation module can dissipate heat from the Stirling engine body 1 and prevent the Stirling engine body 1 from overheating.

[0047] Specifically, a heat exchange channel 1 (not shown in the figure) is provided inside the casing of the Stirling engine body 1. The heat exchange circulation pump 4 is connected to the heat exchange channel 1 of the Stirling engine body 1 through a connecting pipe 41. The heat exchange circulation pump 4 is connected to the condenser radiator 5 through a connecting pipe 42. The condenser radiator 5 is connected to the heat exchange channel 1 of the Stirling engine body 1 through a connecting pipe 43.

[0048] The condenser radiator 5 is a water-air heat exchanger. When the cooling circulation pump 4 is working, it can drive the cooling water to exchange heat between the Stirling engine body 1 and the condenser radiator 5. The condenser radiator 5 has a large heat dissipation area and forms a finned structure, which can output the heat generated by the Stirling engine body 1 to the condenser radiator 5. The heat generated by the system is then dissipated by the air cooling of the condenser radiator 5 by the fan 6.

[0049] In addition, since the rotary actuator 2, i.e., the motor, also generates heat during operation, a heat dissipation module can also assist in cooling the rotary actuator 2. Specifically, a second heat exchange channel is opened inside the housing of the rotary actuator 2. The second heat exchange channel is connected to the third connecting pipe 43 via the fourth connecting pipe 44, and the second heat exchange channel is connected to the first connecting pipe 41 via the fifth connecting pipe 45. With the help of the second heat exchange channel and the third connecting pipe 43, the second heat exchange channel of the rotary actuator 2 can be connected to the heat dissipation module. Cooling water can also flow through the rotary actuator 2, carrying away the heat generated by the rotary actuator 2, and then dissipating it outward through the contact fan 6. This can simultaneously dissipate heat from both the Stirling engine body 1 and the rotary actuator 2, removing the heat generated by the system's work.

[0050] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A heat exchange system for a Stirling refrigeration engine, characterised in that, The application relates to a Stirling refrigeration engine system, which comprises a Stirling engine body (1) including a refrigeration head (8) comprising a plurality of refrigeration assemblies (80), the refrigeration assemblies (80) comprising a cover body I (82) connected to a hot cylinder of the Stirling engine body (1), a cover body II (83) connected to a cold cylinder of the Stirling engine body (1), and a plurality of refrigeration capillaries (81) with two ends respectively connected between the cover body I (82) and the cover body II (83). The cover body I (82) is integrally connected with a connecting seat I (821) provided with a plurality of connecting openings I (822), and the cover body II (83) is integrally connected with a connecting seat II (831) provided with a plurality of connecting openings II (832), the connecting openings I (822) and the connecting openings II (832) one-to-one corresponding and being communicated through the refrigeration capillaries (81). The connecting seat I (821) and the connecting seat II (831) are both arc-shaped structures, each connecting seat I (821) forms a circular ring, and each connecting seat II (831) forms a circular ring. The circular ring formed by each connecting seat II (831) is located at the outer periphery of the circular ring formed by each connecting seat I (821). The Stirling refrigeration engine system further comprises a heat exchange container (3), the refrigeration head (8) of the Stirling refrigeration engine system extends into the heat exchange container (3), and the heat exchange container (3) is provided with a circulating interface I (33) and a circulating interface II (34) for heat exchange medium circulation. The refrigeration head (8) of the Stirling refrigeration engine system is arranged downward, a helical guide vane (31) is arranged between the inner wall of the heat exchange container (3) and the refrigeration head (8), and the circulating interface II (34) and the circulating interface I (33) are located on the upper and lower sides of the heat exchange container (3) respectively. The helical guide vane (31) can divide the annular chamber between the refrigeration head (8) and the inner wall of the heat exchange container (3) into a helical flow channel, and form a helical circulation from top to bottom. The refrigeration assembly (80) further comprises a plurality of heat exchange fins (84) arranged on the outer side of each refrigeration capillary (81) to form a multi-fin structure.

2. A heat exchange system for a Stirling cryogenic engine according to claim 1, wherein The Stirling refrigeration engine system further comprises a rotary driver (2), a rotary output shaft of the rotary driver (2) is connected with a rotating shaft of the Stirling engine body (1) to drive the Stirling engine body (1) to work, and the refrigeration capillaries (81) can be cooled.

3. The heat exchange system of a Stirling cryogenic engine according to claim 1, wherein, The cold output module (9) comprises a cold heat exchanger (91) and a refrigeration circulating pump (92), the output pipe (94) is connected between the cold heat exchanger (91) and the circulating interface one (33), the backflow pipe (93) is connected between the cold heat exchanger (91) and the connecting interface two (832), the refrigeration circulating pump (92) is installed on the output pipe (94), and the refrigeration circulating pump (92) is used for pumping the circulating flow of the heat exchange medium.

4. A heat exchange system for a Stirling cryogenic engine as claimed in claim 3, wherein The cold heat exchanger (91) comprises a cold output part (95) for outputting cold.

5. The heat exchange system of a Stirling cryogenic engine according to claim 1, wherein, The heat dissipation module comprises a heat dissipation circulating pump (4), a condenser radiator (5) and a fan (6), the Stirling engine body (1) is provided with a heat exchange flow channel one, the heat dissipation circulating pump (4) is communicated with the heat exchange flow channel one of the Stirling engine body (1) through the communication pipe one (41), the heat dissipation circulating pump (4) is communicated with the condenser radiator (5) through the communication pipe two (42), the condenser radiator (5) is communicated with the heat exchange flow channel one of the Stirling engine body (1) through the communication pipe three (43), and the fan (6) is used for dissipating heat of the condenser radiator (5).

6. The heat exchange system of a Stirling cryogenic engine according to claim 2, wherein, The communication pipe four (44) and the communication pipe five (45) are further included, the rotary driver (2) is an electric machine, the heat exchange flow channel two is arranged in the rotary driver (2), the heat exchange flow channel two is communicated with the communication pipe three (43) through the communication pipe four (44), and the heat exchange flow channel two is communicated with the communication pipe one (41) through the communication pipe five (45).

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