Refrigerator

Abstract

The application provides a refrigerator, which comprises a shell, a discharge device, a cold finger device and at least two compression devices, a dismounting hole is arranged on the shell between at least two third accommodating cavities arranged at intervals, the dismounting hole is communicated with the first accommodating cavity and is used for dismounting the discharge device. By arranging the dismounting hole, the discharge device can be taken out without dismounting the compression device, the dismounting step of the discharge device can be simplified, and the need of rapid testing of the compression device can be met. By arranging the discharge device with a stepped piston, the requirement for a large stiffness and large amplitude leaf spring can be reduced, the friction between the stepped piston and the discharge cylinder is reduced, and the design life of the discharge device is improved; meanwhile, compared with an equal-area discharge device, the discharge device with the stepped piston has higher reliability and consistency. By arranging a tree topology structure or a net topology structure, the gas flow resistance can be reduced, and the refrigeration efficiency is improved; meanwhile, the structure of the refrigerator is compact, and it is beneficial to realize multi-stage refrigeration.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and more particularly to a refrigeration machine. Background Technology

[0002] In the field of cryogenic refrigeration, refrigeration machines can include regenerative heat engines, GM refrigeration machines, GM-type pulse tube refrigeration machines, Stirling refrigeration machines, and Stirling-type pulse tube refrigeration machines, etc. Among them, the Stirling refrigeration machine utilizes the reciprocating motion of the piston to create periodic pressure fluctuations, and uses an exhaust device operating at low temperature to adjust the sound field distribution of the refrigeration machine, so as to generate a cooling effect in the regenerative structure, and has high efficiency.

[0003] In related technologies, the discharge device is directly installed inside the housing of the refrigeration unit, and the piston of the discharge device is coaxially arranged with the piston of the compressor to reduce the vibration of the refrigeration unit.

[0004] However, the disassembly and assembly steps of the discharge unit in the aforementioned refrigeration units are cumbersome and cannot meet the needs of rapid compressor testing. Summary of the Invention

[0005] In order to solve at least one of the problems mentioned in the background art, this application provides a refrigeration machine, which aims to solve the technical problem that the disassembly and assembly steps of the discharge device of the refrigeration machine in the related art are cumbersome and cannot meet the needs of rapid testing of the compressor.

[0006] To achieve the above objectives, this application provides a refrigeration machine, including a housing, a discharge device, a cooling device, and at least two compression devices, wherein the housing has a first receiving cavity, a second receiving cavity, and at least two third receiving cavities that are interconnected with each other;

[0007] The discharge device is located in the first receiving cavity; the cold finger device is located in the second receiving cavity;

[0008] At least two of the compression devices are located in at least two of the third receiving cavities in a one-to-one correspondence, the at least two third receiving cavities are spaced apart, and the first receiving cavity is located between the at least two third receiving cavities;

[0009] The housing located between at least two of the third receiving cavities spaced apart is provided with a disassembly hole, which communicates with the first receiving cavity and is used for disassembling and assembling the discharge device.

[0010] In the aforementioned refrigeration unit, optionally, the housing has two third receiving cavities, which are spaced apart along a first direction and located on opposite sides of the first receiving cavity;

[0011] The two compression devices are located in the two third receiving cavities in a one-to-one correspondence;

[0012] The first receiving cavity is located between the two third receiving cavities along the first direction;

[0013] The axial direction of the disassembly hole is the second direction, which intersects with the first direction, and the opening of the disassembly hole faces the external environment.

[0014] In the aforementioned refrigeration machine, optionally, the discharge device includes two discharge components spaced apart along the second direction, and the two discharge components together with the housing form a first expansion chamber;

[0015] A first channel is provided on the housing located between the first expansion cavity and the second receiving cavity, the first channel being used to connect the first expansion cavity and the second receiving cavity.

[0016] In the aforementioned refrigeration machine, optionally, the discharge assembly includes a piston, a discharge cylinder, and an elastic element;

[0017] The cavity of the discharge cylinder is provided with a partition structure, which divides the cavity of the discharge cylinder into a first cavity and a second cavity. The cylinder wall of the discharge cylinder is provided with a first through hole, and the partition structure is provided with a second through hole. The first through hole, the first cavity, the second through hole and the second cavity are connected in sequence.

[0018] A second channel is provided on the housing located between the first receiving cavity and the third receiving cavity. The second channel corresponds to the first through hole and is used to connect the first through hole and the third receiving cavity.

[0019] A portion of the piston is located in the first cavity of the discharge cylinder, and another portion passes through the second through hole and is located in the second cavity;

[0020] The elastic element is located in the second cavity of the discharge cylinder and is connected to the piston.

[0021] Optionally, the refrigeration unit described above may also include a cover plate, which is located on the side of the discharge cylinder near the opening of the disassembly hole and is spaced apart from the piston.

[0022] The outer surface of the piston at the end closest to the elastic element, the outer surface of the piston at the end furthest from the elastic element, and the housing together form a third cavity.

[0023] In the aforementioned refrigeration machine, optionally, a third through hole is provided on the cylinder wall of the discharge cylinder, and the third through hole communicates with the first cavity;

[0024] A third channel is provided on the housing located between the first receiving cavity and the second receiving cavity. The third channel corresponds to the third through hole and is used to connect the third through hole and the second receiving cavity.

[0025] In the aforementioned refrigeration machine, optionally, the cold finger device is provided to extend in a third direction within the second receiving cavity;

[0026] The third direction intersects with the first direction and also with the second direction.

[0027] In the aforementioned refrigeration unit, optionally, the refrigeration device includes a first heat exchanger, a first regenerating element, a second heat exchanger, and a first pulse element;

[0028] The first heat exchanger, the first regenerator, the second heat exchanger, and the first pulser are arranged adjacent to each other in sequence;

[0029] A fourth channel is provided on the housing located between the second accommodating cavity and the third accommodating cavity, the fourth channel being used to connect the second accommodating cavity and the third accommodating cavity;

[0030] The first heat exchanger is located inside the second accommodating cavity near the fourth channel, and the gas channel of the first heat exchanger is connected to the fourth channel;

[0031] The first pulse element is located in the second receiving cavity near the first receiving cavity, and the gas channel of the first pulse element is connected to the first receiving cavity.

[0032] In the aforementioned refrigeration unit, optionally, the cold finger device further includes a second regenerating element, a third heat exchange element, and a second pulse element;

[0033] The second heat recovery element, the third heat exchange element, and the second pulse element are arranged adjacent to each other in sequence, and are all located between the first heat exchange element and the first heat recovery element. The gas channel of the second heat recovery element is connected to the gas channel of the first heat exchange element, and the gas channel of the first heat recovery element is connected to the gas channel of the third heat exchange element.

[0034] The gas channel of the second pulse device is connected to the first receiving cavity.

[0035] Optionally, in the aforementioned refrigeration unit, a fifth channel is provided on the housing located between the second and third accommodating cavities. The fifth channel is spaced apart from the fourth channel. The discharge device has a second expansion cavity, which is connected to the gas channel of the second pulse element through the fifth channel.

[0036] The refrigerator provided in this application includes a housing, a discharge device, a cold finger device, and at least two compression devices. The housing has a first receiving cavity, a second receiving cavity, and at least two third receiving cavities that are interconnected. By providing the housing, the discharge device, the cold finger device, and the compression devices can be accommodated to realize the refrigeration function of the refrigerator. The discharge device is located in the first receiving cavity; the cold finger device is located in the second receiving cavity; the at least two compression devices are located in the at least two third receiving cavities in a one-to-one correspondence. The at least two second receiving cavities are spaced apart, and the first receiving cavity is located between the at least two third receiving cavities. By placing the first receiving cavity between the at least two second receiving cavities, that is, placing the discharge device between the at least two compression devices, the pistons of the at least two compression devices move in opposite directions, and the vibrations generated by the piston movements can cancel each other out. In addition, the distance between the discharge device and the compression devices is small, and the gas flow distance is small, which can improve the refrigeration efficiency of the refrigerator. The housing also has a disassembly hole, which is located on the housing between the at least two spaced third receiving cavities and communicates with the first receiving cavity for disassembling and assembling the discharge device. By providing a disassembly and assembly hole on the housing located between at least two spaced third receiving cavities, and by using the disassembly and assembly hole to disassemble and assemble the discharge device, the disassembly and assembly steps of the discharge device can be simplified during the individual testing of the compression device without disassembling the compression device to remove the discharge device, thus meeting the need for rapid testing of the compression device.

[0037] The structure of this application, as well as its other objectives and beneficial effects, will become more apparent and understandable through the description of preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a partially exploded structure of a refrigeration machine provided in an embodiment of this application;

[0040] Figure 2 A schematic diagram of another partially exploded structure of the refrigerator provided in an embodiment of this application;

[0041] Figure 3 An exploded structural diagram of the discharge assembly of the discharge device of the refrigeration machine provided in the embodiments of this application;

[0042] Figure 4 Another exploded structural diagram of the discharge assembly of the discharge device of the refrigeration machine provided in the embodiments of this application;

[0043] Figure 5 This is a partial structural diagram of the housing of a refrigerator provided in an embodiment of this application;

[0044] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure at position AA';

[0045] Figure 7 for Figure 5 A cross-sectional view of the structure at the BB' position;

[0046] Figure 8 for Figure 5 A cross-sectional view of the structure at the CC' position;

[0047] Figure 9 A schematic diagram of another partial structure of the housing of the refrigerator provided in an embodiment of this application;

[0048] Figure 10 for Figure 9 A schematic diagram of the cross-sectional structure at position AA';

[0049] Figure 11 for Figure 9 A cross-sectional view of the structure at the BB' position;

[0050] Figure 12 for Figure 9 A cross-sectional view of the structure at the CC' position;

[0051] Figure 13 A cross-sectional view of the discharge assembly of the discharge device of the refrigeration machine provided in an embodiment of this application;

[0052] Figure 14 A cross-sectional view of a refrigerator provided in an embodiment of this application along a certain direction;

[0053] Figure 15 A cross-sectional view of a refrigerator provided in an embodiment of this application from another direction;

[0054] Figure 16 A cross-sectional view of a refrigerator provided in an embodiment of this application along another direction;

[0055] Figure 17 This is a schematic diagram of the first gas flow process of the refrigeration machine provided in the embodiments of this application;

[0056] Figure 18 This is a schematic diagram of a second gas flow process in a refrigerator provided in an embodiment of this application;

[0057] Figure 19Another cross-sectional view of the discharge assembly of the discharge device of the refrigeration machine provided in the embodiments of this application;

[0058] Figure 20 Another cross-sectional view of the refrigeration unit provided in an embodiment of this application along a certain direction;

[0059] Figure 21 A schematic diagram of another cross-sectional structure of the refrigerator provided in an embodiment of this application, viewed from another direction.

[0060] Figure 22 A schematic diagram of another cross-sectional structure of the refrigeration machine provided in an embodiment of this application along another direction;

[0061] Figure 23 This is a schematic diagram of a third gas flow process in a refrigerator provided in an embodiment of this application;

[0062] Figure 24 This is a schematic diagram of the fourth gas flow process of the refrigeration machine provided in the embodiments of this application.

[0063] Explanation of reference numerals in the attached figures:

[0064] 100-Refrigeration unit; 110-Housing shell; 120-Discharge device; 130-Cold finger device; 140-Compression device; 111-First receiving cavity; 112-Second receiving cavity; 113-Third receiving cavity; 141-First compression cavity; 114-Disassembly hole; X-First direction; Y-Second direction; Z-Third direction; 121-Discharge assembly; 1101-First expansion cavity; 115-First channel; 1211-Piston; 1212-Discharge cylinder; 1213-Elastic element; 12121-Blocking structure; 12122-First cavity; 12123-Second cavity; 12124-First through hole; 12125-Second through hole; 116-Second channel; 150-Cover plate; 1102-First compression cavity; Two compression chambers; 12111-First sub-piston; 12112-Second sub-piston; 1103-Third cavity; 12126-Third through hole; 117-Third channel; 131-First heat exchanger; 132-First regenerating chamber; 133-Second heat exchanger; 134-First pulser; 1104-Fourth cavity; 1121-First heat exchange chamber; 1122-First regenerating chamber; 1123-Second heat exchange chamber; 1124-First pulser; 118-Fourth channel; 135-Second regenerating chamber; 136-Third heat exchanger; 137-Second pulser; 1125-Second regenerating chamber; 1126-Third heat exchange chamber; 1127-Second pulser; 1105-Second expansion chamber; 119-Fifth channel.

[0065] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0066] In related technologies, both the compression unit and the discharge unit are located within the casing of the refrigeration unit. The discharge unit is situated between the two compression units and is coaxially mounted with them, offering high reliability. After the compression units are installed within the refrigeration unit casing, it is typically necessary to test their independent operation stability and usage. This requires disassembling the discharge unit located between the two compression units, a cumbersome process. Furthermore, if the discharge unit malfunctions and requires repair, the compression units must be disassembled first, followed by the removal of the discharge unit. This cumbersome disassembly and assembly process increases the production and maintenance costs of the refrigeration unit.

[0067] Based on the aforementioned technical problems, this application provides a refrigerator, which includes a housing, a discharge device, a cold finger device, and at least two compression devices. The housing has a first receiving cavity, a second receiving cavity, and at least two third receiving cavities that are interconnected. By providing the housing, the discharge device, the cold finger device, and the compression devices can be accommodated, thereby realizing the refrigeration function of the refrigerator. The discharge device is located in the first receiving cavity, the cold finger device is located in the second receiving cavity, and the at least two compression devices are located in the at least two third receiving cavities in a corresponding manner. The at least two third receiving cavities are spaced apart, and the first receiving cavity is located between the at least two third receiving cavities. By placing the first receiving cavity between the at least two second receiving cavities, that is, placing the discharge device between the at least two compression devices, the pistons of the at least two compression devices move in opposite directions, and the vibrations generated by the piston movements can cancel each other out. In addition, the distance between the discharge device and the compression devices is small, and the gas flow distance is small, which can improve the refrigeration efficiency of the refrigerator. The housing also has a disassembly hole, which is located on the housing between the at least two spaced third receiving cavities and communicates with the first receiving cavity, for disassembling and assembling the discharge device. By providing a disassembly and assembly hole on the housing located between at least two spaced third receiving cavities, and by using the disassembly and assembly hole to disassemble and assemble the discharge device, the disassembly and assembly steps of the discharge device can be simplified during the individual testing of the compression device without disassembling the compression device to remove the discharge device, thus meeting the need for rapid testing of the compression device.

[0068] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar structural components or structural components with the same or similar functions throughout. The described embodiments are some embodiments of this application, not all embodiments of the entire structure. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0069] See attached document Figure 1 -Appendix Figure 24 As shown, this application provides a refrigerator 100, including a housing 110, a discharge device 120, a cold finger device 130, and at least two compression devices 140.

[0070] Specifically, refer to the appendix Figure 5 -Appendix Figure 12 As shown, the housing 110 has a first receiving cavity 111, a second receiving cavity 112 and at least two third receiving cavities 113 that are connected to each other. The discharge device 120 is located in the first receiving cavity 111 and the cold finger device 130 is located in the second receiving cavity 112.

[0071] It is understood that each third receiving cavity 113 is connected to the first receiving cavity 111 and also to the second receiving cavity 112, so that the compression device 140 can push the gas to the discharge device 120 and the cooling device 130 to complete the cooling function of the refrigerator 100.

[0072] At least two compression devices 140 are located in at least two third receiving cavities 113 in a one-to-one correspondence, that is, there are at least two compression devices 140, and the compression devices 140 are located in the corresponding third receiving cavities 113.

[0073] It is understood that the compression device 140 is used to push the gas, which can be formed in the first compression chamber 141, which is located in the third receiving chamber 113 on the side close to the first receiving chamber 111 and the second receiving chamber 112. When the refrigerator 100 has at least two compression devices 140, the pressure fluctuation that the refrigerator 100 can generate is larger, which can improve the refrigeration efficiency of the refrigerator 100.

[0074] When the first receiving chamber 111, the second receiving chamber 112 and the third receiving chamber 113 are connected in pairs, the compression device 140 can push the gas from the first compression chamber 141 to the first receiving chamber 111 and the second receiving chamber 112, so that the gas enters the discharge device 120 and the cooling device 130.

[0075] In this arrangement, at least two third receiving cavities 113 are spaced apart, and the first receiving cavity 111 is located between the at least two third receiving cavities 113. That is, the discharge device 120 can be located between at least two compression devices 140. Compared with other arrangements, the distance between the first receiving cavity 111 and the third receiving cavity 113 can be shortened, thereby shortening the flow distance of the gas in the compression device 140 and improving the refrigeration efficiency of the refrigerator 100.

[0076] See attached document Figure 1 and attached Figure 2 As shown, the housing 110 also has a disassembly hole 114, which is used for disassembling and assembling the discharge device 120. That is, the user can install and remove the discharge device 120 through the disassembly hole 114. During the process of testing the compression device 140 separately, there is no need to disassemble the compression device 140 and take out the discharge device 120, which can simplify the disassembly and assembly steps of the discharge device 120 and meet the needs of rapid testing of the compression device 140.

[0077] Furthermore, the disassembly hole 114 is located on the housing 110 between at least two spaced third receiving cavities 113 and communicates with the first receiving cavity 111.

[0078] It should be noted that the number of third receiving cavities 113 can be arbitrary. For example, the number of third receiving cavities 113 can be two, three, four, five, etc. The embodiments of this application do not limit the specific number of third receiving cavities 113, nor are they limited to the above examples.

[0079] The following explanation uses two third receiving cavities 113 as an example.

[0080] By providing the aforementioned housing 110, the discharge device 120, the cold finger device 130, and the compression device 140 can be accommodated, thereby realizing the cooling function of the refrigerator 100. By placing the first receiving cavity 111 between at least two third receiving cavities 113, that is, placing the discharge device 120 between at least two compression devices 140, the pistons of the two compression devices 140 move in opposite directions, and the vibrations generated by the movement of the piston 1211 can cancel each other out. By providing a disassembly hole 114 on the housing 110 located between at least two spaced third receiving cavities 113, and by using the disassembly hole 114 to disassemble and assemble the discharge device 120, during the individual testing of the compression device 140, it is not necessary to disassemble the compression device 140 to remove the discharge device 120, which simplifies the disassembly and assembly steps of the discharge device 120 and meets the need for rapid testing of the compression device 140.

[0081] As an optional implementation, the housing 110 has two third receiving cavities 113, which are spaced apart along the first direction X and located on opposite sides of the first receiving cavity 111.

[0082] See attached document Figure 1 and attached Figure 2 As shown, the two compression devices 140 are located in the two third receiving cavities 113 in a one-to-one correspondence. The first receiving cavity 111 is located between the two third receiving cavities 113 along the first direction X. The axial direction of the disassembly hole 114 is the second direction Y, which intersects with the first direction X. The opening of the disassembly hole 114 faces the external environment.

[0083] Furthermore, the second direction Y can be perpendicular to the first direction X.

[0084] By setting the number of third receiving cavities 113 to two, that is, the number of compression devices 140 is two, and the movement directions of the compression pistons of the two compression devices 140 are opposite, the vibrations generated by the movement of the compression pistons can cancel each other out; by setting the axial direction of the disassembly hole 114 so that the direction of the opening of the disassembly hole 114 facing the external environment intersects with the direction of the arrangement of the compression devices 140, that is, the user can install or remove the discharge device 120 along the second direction Y without disassembling the compression device 140, which simplifies the disassembly and assembly steps of the discharge device 120 and meets the need for rapid testing of the compression device 140.

[0085] As an optional implementation method, refer to the appendix. Figure 1 and attached Figure 2As shown, the discharge device 120 includes two discharge components 121 arranged at intervals along the second direction Y. The two discharge components 121 and the housing 110 together form a first expansion cavity 1101. A first channel 115 is provided on the housing 110 between the first expansion cavity 1101 and the second receiving cavity 112. The first channel 115 is used to connect the first expansion cavity 1101 and the second receiving cavity 112.

[0086] By setting the discharge assembly 121 arranged along the second direction Y, the user can easily install or remove the discharge device 120 through the disassembly hole 114 without disassembling the compression device 140, which simplifies the disassembly and assembly steps of the discharge device 120 and meets the need for rapid testing of the compression device 140. By forming the first expansion chamber 1101 and the first channel 115, the first expansion chamber 1101 is connected to the second receiving chamber 112 through the first channel 115. That is, the cold finger device 130 and the discharge device 120 can be connected through the first channel 115, so that the discharge device 120 can recover sound energy and complete the cooling function of the refrigerator 100.

[0087] As an optional implementation method, refer to the appendix. Figure 1 and attached Figure 2 As shown, the cold finger device 130 is provided in the second receiving cavity 112 extending along the third direction Z, which intersects with the first direction X and the second direction Y.

[0088] Furthermore, the third direction Z can be perpendicular to the first direction X or the second direction Y.

[0089] By setting a cold finger device 130 extending along a third direction Z, and the third direction Z being perpendicular to the first direction X and the second direction Y respectively, that is, the extension direction of the cold finger device 130 being perpendicular to the extension direction of the discharge device 120 and the extension direction of the compression device 140 respectively, the space utilization rate of the refrigeration unit 100 can be improved.

[0090] As an optional implementation method, refer to the appendix. Figure 3 Appendix Figure 4 Appendix Figure 13 and appendix Figure 19 As shown, the discharge assembly 121 includes a piston 1211, a discharge cylinder 1212, and an elastic element 1213.

[0091] Specifically, a partition structure 12121 is provided in the cavity of the discharge cylinder 1212, which can divide the cavity of the discharge cylinder 1212 into a first cavity 12122 and a second cavity 12123. A first through hole 12124 is also provided on the cylinder wall of the discharge cylinder 1212, and a second through hole 12125 is provided on the partition structure 12121. The first through hole 12124, the first cavity 12122, the second through hole 12125 and the second cavity 12123 are connected in sequence.

[0092] A second channel 116 is also provided on the housing 110 located between the first receiving cavity 111 and the third receiving cavity 113. The second channel 116 corresponds to the first through hole 12124 and is used to connect the first through hole 12124 and the first compression cavity 141. That is, the gas pushed by the compression device 140 passes through the first compression cavity 141 sequentially through the second channel 116, the first through hole 12124, the first cavity 12122, the second through hole 12125, and the second cavity 12123. In other words, the gas can enter the first cavity 12122 from the first compression cavity 141 through the second channel 116 and the first through hole 12124, and then enter the second cavity 12123 through the second through hole 12125.

[0093] Furthermore, a portion of the piston 1211 is located in the first cavity 12122 of the discharge cylinder 1212, and another portion passes through the second through hole 12125 and is located in the second cavity 12123. The elastic member 1213 is located in the second cavity 12123 of the discharge cylinder 1212 and is connected to the piston 1211. The elastic member 1213 is positioned close to the opening of the disassembly hole 114.

[0094] Understandably, when part of the piston 1211 is located within the first cavity 12122 of the discharge cylinder 1212, the piston 1211 and the discharge cylinder 1212 are spaced apart, forming a second compression chamber 1102. The gas propelled by the compression device 140 can pass sequentially from the first compression chamber 141 through the second channel 116, the first through hole 12124, the first cavity 12122, and the second compression chamber 1102, i.e., the first compression chamber 141 and the second compression chamber 1102 are connected. As the gas is propelled, the size of the second compression chamber 1102 changes, which can drive the piston 1211 to move along the second direction Y, thereby causing the elastic element 1213 to undergo elastic deformation.

[0095] It should be noted that the elastic element 1213 can be a leaf spring, which can be connected to the piston 1211 via a screw connection.

[0096] It is understood that piston 1211 may include a first sub-piston 12111 and a second sub-piston 12112. The dimensions of the first sub-piston 12111 and the second sub-piston 12112 may differ; for example, the diameter of the first sub-piston 12111 may be larger than the diameter of the second sub-piston 12112. The first sub-piston 12111 is located within the first cavity 12122, and the second sub-piston 12112 passes through the second through hole 12125 and is connected to the elastic member 1213. The first sub-piston 12111, the second sub-piston 12112, and the discharge cylinder 1212 together form the second compression chamber 1102.

[0097] It should be noted that the first sub-piston 12111 and the second sub-piston 12112 can be connected by threads or integrally formed. The embodiments of this application do not limit the connection relationship between the first sub-piston 12111 and the second sub-piston 12112, nor are they limited to the above examples.

[0098] By configuring the discharge assembly 121 as described above, a first expansion chamber 1101 and a second compression chamber 1102 are formed on both sides of the piston 1211 of the discharge assembly 121. The piston 1211 reciprocates under the drive of the pressure on both sides. The first sub-piston 12111 and the second sub-piston 12112 form a stepped piston. The stepped piston can reduce the requirements of the elastic element 1213 of the discharge assembly 121. For example, a leaf spring needs to have a large stiffness and a large amplitude. With the stepped piston, the discharge assembly 121 can use a leaf spring with a smaller stiffness, or even eliminate the need for a leaf spring. This can reduce the friction between the stepped piston and the inner wall of the discharge cylinder 1212, thereby improving the service life of the discharge assembly 121. In addition, the driving force of the stepped piston mainly comes from the area difference rather than the pressure difference, thus enabling the refrigerator 100 to achieve higher reliability and consistency.

[0099] As an optional implementation method, refer to the appendix. Figure 1 Appendix Figure 2 Appendix Figure 15 and attached Figure 21 As shown, it also includes a cover plate 150, which is located on the side of the discharge cylinder 1212 near the opening of the disassembly hole 114 and is spaced apart from the piston 1211. The outer surface of the piston 1211 near the elastic member 1213, the outer surface of the piston 1211 away from the elastic member 1213, and the housing 110 together form a third cavity 1103.

[0100] It is understood that the cover plate 150 can be connected to the housing 110 by screws or by laser welding. The specific connection method between the cover plate 150 and the housing 110 is not limited in this application embodiment, nor is it limited to the above example.

[0101] By setting the cover plate 150 as described above, a third cavity 1103 is formed. The third cavity 1103 can cooperate with the first expansion cavity 1101 and the second compression cavity 1102 to realize sound power recovery.

[0102] As an optional implementation method, refer to the appendix. Figure 21 As shown, the discharge cylinder 1212 also has a third through hole 12126, which communicates with the first cavity 12122. The housing 110 also has a third channel 117, which is provided on the housing 110 located between the first receiving cavity 111 and the second receiving cavity 112. The third channel 117 corresponds to the third through hole 12126 and is used to connect the third through hole 12126 with the second receiving cavity 112.

[0103] It should be noted that the third through hole 12126 connects to the second compression chamber 1102.

[0104] By opening a third through hole 12126 on the discharge cylinder 1212 and a third channel 117 at the corresponding position on the housing 110, the discharge cylinder 1212 can communicate with the second receiving cavity 112, that is, the second receiving cavity 112 is connected to the second compression cavity 1102. The second compression cavity 1102 is connected to the second receiving cavity 112 through the third channel 117 and the third through hole 12126, and the second compression cavity 1102 is connected to the first compression cavity 141 through the second channel 116 and the first through hole 12124, forming a mesh-like interconnected structure. Within the same volume space, the increased passage between the first compression cavity 141 and the second compression cavity 1102 can reduce the gas flow rate of the refrigerator 100, thereby improving the refrigeration efficiency of the refrigerator 100.

[0105] As an optional implementation method, refer to the appendix. Figure 14 -Appendix Figure 16 Appendix Figure 20 -Appendix Figure 22 As shown, the cold finger device 130 includes a first heat exchanger 131, a first regenerating element 132, a second heat exchanger 133, and a first pulse element 134.

[0106] Specifically, the first heat exchanger 131, the first regenerating heat exchanger 132, the second heat exchanger 133, and the first pulser 134 all have gas channels, and these components can be arranged sequentially adjacent to each other. That is, the gas propelled by the compression device 140 enters the second receiving cavity 112 from the first compression chamber 141, and then sequentially passes through the gas channels of the first heat exchanger 131, the first regenerating heat exchanger 132, the second heat exchanger 133, and the first pulser 134 before entering the first expansion chamber 1101.

[0107] Furthermore, the second receiving cavity 112 may include multiple spaces, namely, the second receiving cavity 112 may include a fourth cavity 1104, a first heat exchange cavity 1121, a first regenerating cavity 1122, a second heat exchange cavity 1123 and a first pulse cavity 1124, and the fourth cavity 1104, the first heat exchange cavity 1121, the first regenerating cavity 1122, the second heat exchange cavity 1123 and the first pulse cavity 1124 are connected in sequence. The first heat exchanger 131 is located in the first heat exchange chamber 1121, the first regenerating element 132 is located in the first regenerating chamber 1122, the second heat exchanger 133 is located in the second heat exchange chamber 1123, and the first pulse element 134 is located in the first pulse chamber 1124. That is, the gas pushed by the compression device 140 enters the second receiving chamber 112 from the first compression chamber 141, and then passes through the fourth cavity 1104, the first heat exchange chamber 1121, the first regenerating chamber 1122, the second heat exchange chamber 1123, and the first pulse chamber 1124 in sequence, and then enters the first expansion chamber 1101.

[0108] See attached document Figure 7 Appendix Figure 11 Appendix Figure 14 and appendix Figure 20 As shown, a fourth channel 118 is also provided on the housing 110 located between the second receiving cavity 112 and the third receiving cavity 113. The fourth channel 118 is used to connect the second receiving cavity 112 and the third receiving cavity 113.

[0109] Furthermore, the first heat exchanger 131 is located in the second receiving cavity 112 near the fourth channel 118, and the gas channel of the first heat exchanger 131 is connected to the fourth channel 118; the first pulser 134 is located in the second receiving cavity 112 near the first receiving cavity 111, and the gas channel of the first pulser 134 is connected to the first receiving cavity 111.

[0110] By setting the aforementioned cooling device 130, the gas pushed by the compression device 140 can enter the first heat exchange chamber 1121 through the first compression chamber 141, the fourth channel 118, and the fourth cavity 1104. The first heat exchange element 131 in the first heat exchange chamber 1121 can release heat. After passing through the first heat exchange element 131, the gas enters the first heat recovery element 132 in the first heat recovery chamber 1122. After passing through the first heat recovery element 132, the gas enters the second heat exchange element 133 in the second heat exchange chamber 1123. The second heat exchange element 133 absorbs heat. After passing through the second heat exchange element 133, the gas generates cold energy, forming a refrigeration effect, and enters the first pulse element 134 in the first pulse chamber 1124. After passing through the first pulse element 134, the gas enters the first expansion chamber 1101.

[0111] In some of these embodiments, reference is made to the appendix. Figure 14 -Appendix Figure 17As shown, the gas flow process in the refrigeration unit 100 is as follows:

[0112] Part of the gas propelled by the compression device 140 passes through the first compression chamber 141, the second channel 116, and sequentially through the first through hole 12124 of the discharge cylinder 1212 into the first cavity 12122 and then into the second compression chamber 1102, thereby driving the piston 1211 to move. Simultaneously, another part of the gas propelled by the compression device 140 passes through the first compression chamber 141, the fourth channel 118, and sequentially through the fourth cavity 1104, the first heat exchange chamber 1121, the first regenerative chamber 1122, the second heat exchange chamber 1123, the first pulse chamber 1124, and the first channel 115 into the first expansion chamber 1101 between the two discharge assemblies 121, thereby driving the piston 1211 to move in the opposite direction. The first expansion chamber 1101, the second compression chamber 1102, and the third cavity 1103 can effectively achieve sound power recovery.

[0113] In other embodiments, refer to the appendix. Figure 14 -Appendix Figure 16 and appendix Figure 18 As shown, when the discharge cylinder 1212 also has a third through hole 12126 and the housing 110 also has a third channel 117, the first receiving cavity 111 is connected to the second receiving cavity 112, that is, the fourth cavity 1104 is connected to the second compression cavity 1102. The second compression cavity 1102 and the fourth cavity 1104 are connected through the third channel 117 and the third through hole 12126, and the second compression cavity 1102 and the first compression cavity 141 are connected through the second channel 116 and the first through hole 12124. The passage between the first compression cavity 141 and the second compression cavity 1102 is increased, and the gas flow rate of the refrigerator 100 can be reduced within the same volume space, thereby improving the refrigeration efficiency of the refrigerator 100.

[0114] As an optional implementation method, refer to the appendix. Figure 20 -Appendix Figure 22 As shown, the cold finger device 130 also includes a second heat recovery element 135, a third heat exchange element 136, and a second pulse element 137.

[0115] Specifically, the second heat recovery element 135, the third heat exchange element 136, and the second pulse element 137 all have gas channels. These elements are arranged sequentially adjacent to each other, and are all located between the first heat exchange element 131 and the first heat recovery element 132. The gas channel of the second heat recovery element 135 communicates with the gas channel of the first heat exchange element 131, the gas channel of the first heat recovery element 132 communicates with the gas channel of the third heat exchange element 136, and the gas channel of the second pulse element 137 communicates with the first receiving cavity 111. That is, after the gas propelled by the compression device 140 enters the gas channel of the third heat exchange element 136, a portion of the gas enters the gas channel of the first heat recovery element 132, and the remaining portion enters the gas channel of the second pulse element 137.

[0116] Furthermore, the gas entering the gas passage of the first heat exchanger 132 passes sequentially through the gas passage of the second heat exchanger 133, the gas passage of the first pulser 134, and the first passage 115 into the first expansion chamber 1101, thereby driving the piston 1211 to move.

[0117] Furthermore, the second receiving cavity 112 may also include a second regenerating cavity 1125, a third heat exchange cavity 1126, and a second pulse cavity 1127, which are sequentially connected. The second regenerating element 135 is located within the second regenerating cavity 1125, the third heat exchange element 136 is located within the third heat exchange cavity 1126, and the second pulse element 137 is located within the second pulse cavity 137. That is, after the gas propelled by the compression device 140 enters the third heat exchange cavity 1126, a portion of the gas enters the first regenerating cavity 1122, and the remaining portion enters the second pulse cavity 1127. The gas entering the first regenerating cavity 1122 then sequentially passes through the second heat exchange cavity 1123, the first pulse cavity 1124, and the first channel 115 before entering the first expansion cavity 1101.

[0118] As an optional implementation method, refer to the appendix. Figure 9 -Appendix Figure 12 Appendix Figure 20 -Appendix Figure 21 As shown, a fifth channel 119 is also provided on the housing 110 located between the second receiving cavity 112 and the third receiving cavity 113. The fifth channel 119 is spaced apart from the fourth channel 118. The discharge device 120 has a second expansion cavity 1105, which is connected to the gas channel of the second pulse element 137 through the fifth channel 119.

[0119] It is understandable that the gas entering the gas channel of the second pulse element 137 enters the second expansion chamber 1105 through the fifth channel 119, which can drive the piston 1211 to move.

[0120] It should be noted that the second expansion chamber 1105 can be located between the first expansion chamber 1101 and the second compression chamber 1102 in the second direction Y. The second expansion chamber 1105 can be formed by the piston 1211 and the discharge cylinder 1212. When the piston 1211 moves, the size of the second expansion chamber 1105 can be changed. As a result, the gas entering the second expansion chamber 1105 and the gas entering the first expansion chamber 1101 can cause the piston 1211 to move in opposite directions. At the same time, the gas entering the second expansion chamber 1105 and the gas entering the second compression chamber 1102 can also cause the piston 1211 to move in opposite directions, which can better realize sound power recovery.

[0121] Furthermore, the first expansion chamber 1101 corresponds to the first regenerating element 132, and the second expansion chamber 1105 corresponds to the second regenerating element 135.

[0122] In some of these embodiments, reference is made to the appendix. Figure 20 -Appendix Figure 23 As shown, the gas in the refrigerator 100 flows through the first heat exchange chamber 1121 as follows:

[0123] The gas passing through the first heat exchange chamber 1121 sequentially passes through the second regenerating chamber 1125 and the third heat exchange chamber 1126. Part of the gas passing through the third heat exchange chamber 1126 sequentially passes through the first regenerating chamber 1122, the second heat exchange chamber 1123, the first pulse chamber 1124, and the first channel 115 into the first expansion chamber 1101 between the two discharge components 121, thereby driving the piston 1211 to move. At the same time, another part of the gas passing through the third heat exchange chamber 1126 passes through the second pulse chamber 1127 and the fifth channel 119 into the second expansion chamber 1105, thereby driving the piston 1211 to move in the opposite direction. The first expansion chamber 1101, the second compression chamber 1102, and the second expansion chamber 1105, together with the third cavity 1103, can effectively achieve sound power recovery.

[0124] In other embodiments, refer to the appendix. Figure 9 -Appendix Figure 12 See attached document Figure 21 Appendix Figure 22 and appendix Figure 24As shown, when the discharge cylinder 1212 also has a third through hole 12126 and the housing 110 also has a third channel 117, the first receiving cavity 111 is connected to the second receiving cavity 112, that is, the fourth cavity 1104 is connected to the second compression cavity 1102. The second compression cavity 1102 and the fourth cavity 1104 are connected through the third channel 117 and the third through hole 12126, and the second compression cavity 1102 and the first compression cavity 141 are connected through the second channel 116 and the first through hole 12124. The increased passage between the first compression cavity 141 and the second compression cavity 1102 allows for a reduction in the gas flow rate of the refrigerator 100 within the same volume space, thereby improving the refrigeration efficiency of the refrigerator 100.

[0125] In the description of the embodiments of this application, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, the connection of internal structures of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0126] The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application. In the description of this application, "multiple" means two or more, unless otherwise precisely specified.

[0127] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to the structural or full structural technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A refrigeration machine, characterized in that, It includes a housing, a discharge device, a cooling device, and at least two compression devices, wherein the housing has a first receiving cavity, a second receiving cavity, and at least two third receiving cavities that are interconnected with each other; The discharge device is located in the first receiving cavity; the cold finger device is located in the second receiving cavity; At least two of the compression devices are located in at least two of the third receiving cavities in a one-to-one correspondence, the at least two third receiving cavities are spaced apart, and the first receiving cavity is located between the at least two third receiving cavities; The housing located between at least two of the third receiving cavities spaced apart is provided with a disassembly hole, which communicates with the first receiving cavity and is used for disassembling and assembling the discharge device.

2. The refrigeration machine according to claim 1, characterized in that, The housing has two third receiving cavities, which are spaced apart along a first direction and located on opposite sides of the first receiving cavity; The two compression devices are located in the two third receiving cavities in a one-to-one correspondence; The first receiving cavity is located between the two third receiving cavities along the first direction; The axial direction of the disassembly hole is the second direction, which intersects with the first direction, and the opening of the disassembly hole faces the external environment.

3. The refrigeration machine according to claim 2, characterized in that, The discharge device includes two discharge components spaced apart along the second direction, and the two discharge components together with the housing form a first expansion cavity; A first channel is provided on the housing between the first expansion cavity and the second receiving cavity, and the first channel is used to connect the first expansion cavity and the second receiving cavity.

4. The refrigeration machine according to claim 3, characterized in that, The discharge assembly includes a piston, a discharge cylinder, and an elastic element; The cavity of the discharge cylinder is provided with a partition structure, which divides the cavity of the discharge cylinder into a first cavity and a second cavity. The cylinder wall of the discharge cylinder is provided with a first through hole, and the partition structure is provided with a second through hole. The first through hole, the first cavity, the second through hole and the second cavity are connected in sequence. A second channel is provided on the housing located between the first receiving cavity and the third receiving cavity. The second channel corresponds to the first through hole and is used to connect the first through hole and the third receiving cavity. A portion of the piston is located in the first cavity of the discharge cylinder, and another portion passes through the second through hole and is located in the second cavity; The elastic element is located in the second cavity of the discharge cylinder and is connected to the piston.

5. The refrigeration machine according to claim 4, characterized in that, It also includes a cover plate, which is located on the side of the discharge cylinder near the opening of the disassembly hole and is spaced apart from the piston; The outer surface of the piston at the end closest to the elastic element, the outer surface of the piston at the end furthest from the elastic element, and the housing together form a third cavity.

6. The refrigeration machine according to claim 4, characterized in that, The cylinder wall of the discharge cylinder is also provided with a third through hole, which communicates with the first cavity; A third channel is provided on the housing located between the first receiving cavity and the second receiving cavity. The third channel corresponds to the third through hole and is used to connect the third through hole and the second receiving cavity.

7. The refrigeration machine according to claim 2, characterized in that, The cold finger device is disposed within the second receiving cavity in a third direction; The third direction intersects with the first direction and also with the second direction.

8. The refrigeration machine according to any one of claims 1-7, characterized in that, The cold finger device includes a first heat exchanger, a first regenerating element, a second heat exchanger, and a first pulse element; The first heat exchanger, the first regenerator, the second heat exchanger, and the first pulser are arranged adjacent to each other in sequence; A fourth channel is provided on the housing located between the second accommodating cavity and the third accommodating cavity, the fourth channel being used to connect the second accommodating cavity and the third accommodating cavity; The first heat exchanger is located inside the second accommodating cavity near the fourth channel, and the gas channel of the first heat exchanger is connected to the fourth channel; The first pulse element is located in the second receiving cavity near the first receiving cavity, and the gas channel of the first pulse element is connected to the first receiving cavity.

9. The refrigeration machine according to claim 8, characterized in that, The cold finger device also includes a second heat recovery element, a third heat exchange element, and a second pulse element; The second heat recovery element, the third heat exchange element, and the second pulse element are arranged adjacent to each other in sequence, and are all located between the first heat exchange element and the first heat recovery element. The gas channel of the second heat recovery element is connected to the gas channel of the first heat exchange element, and the gas channel of the first heat recovery element is connected to the gas channel of the third heat exchange element. The gas channel of the second pulse device is connected to the first receiving cavity.

10. The refrigeration machine according to claim 9, characterized in that, A fifth channel is also provided on the housing located between the second receiving cavity and the third receiving cavity. The fifth channel is spaced apart from the fourth channel. The discharge device has a second expansion cavity, which is connected to the gas channel of the second pulse element through the fifth channel.

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