Thermoacoustic refrigeration refrigerator

Abstract

This invention discloses a thermoacoustic refrigeration refrigerator, comprising: a refrigerator body, a thermoacoustic refrigeration unit with a hot end and a cold end, a low-temperature circulation loop, and a normal-temperature circulation loop. A cooler is connected in series in the low-temperature circulation loop. The cooler includes two parallel manifolds and several sets of coil assemblies connected in parallel between the two manifolds. All coil assemblies are arranged along the extension direction of the manifolds. Each coil assembly includes two connectors connected to different manifolds and several serpentine coils connected in parallel between the two connectors. All serpentine coils are arranged perpendicular to the extension direction of the manifolds, and the plane containing the axis of the serpentine coils is parallel to the axis of the manifolds. The cooler forms a multi-stage parallel heat exchange pipeline through the relative arrangement of the serpentine coils, coil assemblies, and manifolds, resulting in excellent heat exchange effect and low fluid flow resistance and loss in the cooler.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and more particularly to a cooler and its thermoacoustic refrigeration refrigerator. Background Technology

[0002] Currently, the coolers used in heat exchange systems on the market are generally composed of two rows of bent single tubes connected in series. This tube arrangement makes the length of a single tube particularly long, which is not conducive to the flow of fluid inside the tube and will cause the following problems: high fluid flow resistance, high power consumption to drive the fluid flow, and thus high energy consumption of the heat exchange system. Summary of the Invention

[0003] In order to overcome at least one of the defects described in the prior art, the present invention provides a cooler to solve the problems of high fluid flow resistance and high wasted energy loss in existing coolers.

[0004] The technical solution adopted by this invention to solve its problem is:

[0005] A cooler, comprising:

[0006] Two parallel manifolds;

[0007] Several sets of coil assemblies are connected in parallel between the two manifolds, and all the coil assemblies are arranged along the extension direction of the manifolds, wherein,

[0008] The coil assembly includes two connectors connected to different manifolds and several serpentine coils connected in parallel between the two connectors. All the serpentine coils are arranged along an extension direction perpendicular to the manifolds, and the plane containing the axis of the serpentine coils is parallel to the axis of the manifolds.

[0009] The cooler provided by this invention connects several sets of coil assemblies in parallel between two manifolds, and each set of coil assemblies has several serpentine coils connected in parallel. These coils are then connected to the two manifolds via connectors. By combining the specific arrangement of the serpentine coils, coil assemblies, and manifolds, the length of each serpentine coil between the two manifolds is shorter, while maintaining the same space and total length of the heat exchange pipes. This results in reduced fluid flow resistance and reduced wasted energy.

[0010] Furthermore, each of the coil assemblies has two serpentine coils, and the connector is a tee connector. The two ends of the two serpentine coils are respectively connected to different connecting ends of the two tee connectors, and the plane of the three connecting ends of the tee connector is perpendicular to the axis of the manifold.

[0011] Therefore, by using a T-joint to reduce the number of openings on the manifold, the number of connection points on the manifold is reduced, thus reducing the thermal deformation of the manifold. At the same time, by setting the planes of the three connection ends of the T-joint perpendicular to the axis of the manifold, the fluid of one path is divided into two parts, and the flow rate of the serpentine coil at the same height level is ensured to be the same.

[0012] Furthermore, the tee connector includes a U-shaped conduit and a straight pipe connected to the bottom of the U-shaped conduit, with the end of the straight pipe welded to the manifold.

[0013] Therefore, by connecting the U-shaped conduit with the straight pipe, the flow of fluid in the U-shaped conduit can be made smoother, reducing its flow resistance.

[0014] Furthermore, the two ends of the U-shaped conduit are respectively inserted and fixed to the ends of different serpentine coils.

[0015] Therefore, by inserting and fixing the end of the U-shaped conduit to the end of the serpentine coil, and combining this with the aforementioned method of welding the end of the straight pipe to the manifold, the overall assembly and production of the cooler becomes simpler and more convenient, improving the yield rate.

[0016] Furthermore, the serpentine coil includes a coil body and two insertion sleeves respectively connected to both ends of the coil body. The inner diameter of the insertion sleeve is larger than the inner diameter of the coil body and the outer diameter of the insertion sleeve is larger than the outer diameter of the coil body. The end of the U-shaped conduit is inserted and fixed inside the insertion sleeve.

[0017] This makes it easier to control the inner diameter of the U-shaped conduit to match the inner diameter of the coil body, thus avoiding severe turbulence at the connection between the U-shaped conduit and the serpentine coil.

[0018] Furthermore, the end of the insertion sleeve away from the coil body is provided with an outwardly widened flared opening.

[0019] Therefore, the flared opening can serve as a guide for insertion, facilitating the insertion and assembly of the U-shaped conduit and the insertion sleeve.

[0020] Furthermore, the coil assembly also includes a number of fins, all of which are arranged in parallel on the serpentine coil.

[0021] Therefore, fins are used to enhance the heat exchange efficiency of the serpentine coil.

[0022] Furthermore, each of the fins is connected to the two serpentine coils and is perpendicular to the serpentine coils.

[0023] Thus, each fin achieves heat conduction at the same height and temperature level, avoiding or reducing thermal deformation caused by uneven heating of the fins.

[0024] Furthermore, the fin is provided with two spaced-apart through holes, and the two serpentine coils respectively pass through the two through holes to achieve the connection between the fin and the two serpentine coils.

[0025] The present invention also provides a thermoacoustic refrigeration refrigerator, which includes: a refrigerator body; a thermoacoustic refrigeration unit having a hot end and a cold end; a low-temperature circulation loop for transferring the cooling capacity of the cold end to the refrigerator body, wherein the cooler is connected in series in the low-temperature circulation loop and the cooler is disposed inside the refrigerator body; and a normal temperature circulation loop for dissipating the waste heat of the hot end to the outside.

[0026] Applying the cooler of this solution to a thermoacoustic refrigeration refrigerator can effectively reduce the energy consumption of the thermoacoustic refrigeration refrigerator, thereby achieving energy saving.

[0027] In summary, the cooler provided by the present invention has the following technical effects:

[0028] In this cooler, a multi-stage parallel heat exchange pipeline is formed by the relative arrangement of serpentine coils, coil assemblies, and manifolds, resulting in excellent heat exchange performance. Furthermore, the fluid flow resistance and losses in the cooler are low, which can effectively reduce the energy consumption of thermoacoustic refrigeration refrigerators and achieve energy-saving effects. At the same time, the cooler has a simple overall structure, is easy to manufacture and assemble, and is convenient for widespread application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the cooler according to Embodiment 1 of the present invention;

[0030] Figure 2 for Figure 1 The enlarged view of part A shown below;

[0031] Figure 3 This is a schematic diagram of the cooler structure after the fins are removed according to Embodiment 1 of the present invention;

[0032] Figure 4 This is a perspective structural diagram of the thermoacoustic refrigeration refrigerator of Embodiment 2 of the present invention.

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 1. Refrigerator body; 2. Thermoacoustic refrigeration unit; 21. Hot end; 22. Cold end; 3. Low temperature circulation loop; 4. Normal temperature circulation loop; 5. Cooler; 51. Manifold; 52. Coil assembly; 521. Connector; 521'. T-joint; 5211. U-shaped conduit; 5212. Straight pipe; 522. Snake coil; 5221. Coil body; 5222. Insert sleeve; 5223. Flared mouth; 523. Fin; 5231. Through hole. Detailed Implementation

[0035] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] Example 1

[0039] See Figure 1 and Figure 3 The present invention discloses a cooler 5, which is applied in heat exchange systems, such as refrigerators, air conditioners, steam generators and other devices that need to exchange heat for cooling or heating.

[0040] In this embodiment, the cooler 5 includes two parallel manifolds 51 and four coil assemblies 52. The ends of the two manifolds 51 are respectively connected to the pipelines of the heat exchange system to serve as a conduit for the refrigerant; the four coil assemblies 52 are connected in parallel between the two manifolds 51 to serve as the main heat exchangers.

[0041] See Figure 1Preferably, the coil assembly 52 includes two connectors 521, two serpentine coils 522, and several fins 523 disposed on the serpentine coils 522. The two connectors 521 are respectively connected to different manifolds 51, and the two serpentine coils 522 are connected in parallel between the two connectors 521. Thus, the refrigerant flowing in the two serpentine coils 522 is collected and conducted to the two manifolds 51 by the two connectors 521, thereby reducing the number of openings on the manifolds 51, and thus reducing the number of connection points on the manifolds 51 and reducing the amount of thermal deformation of the manifolds 51. The four coil assemblies 52 are arranged along the extension direction of the manifolds 51. The two serpentine coils 522 in each coil assembly 52 are arranged along the extension direction perpendicular to the manifolds 51, and the plane containing the axis of the serpentine coils 522 is parallel to the axis of the manifolds 51, thereby better controlling the space occupied by the cooler 5.

[0042] Unlike existing cooler technologies that use a single tube bent to form two rows of series pipes, the cooler 5 provided by this invention connects four sets of coil assemblies 52 in parallel between two manifolds 51, with each set of coil assemblies 52 having two serpentine coils 522 in parallel, forming a multi-stage parallel heat exchange pipeline. Simply put, the cooler 5 of this invention adopts an eight-tube design with four sets of two parallel rows, so that, with the same space occupied and the same total length of heat exchange pipeline, the length of each serpentine coil 522 between the two manifolds 51 is shorter, thereby reducing fluid flow resistance and waste power loss, effectively reducing the energy consumption of the heat exchange system, and achieving energy saving.

[0043] It is understood that the coil assembly 52 may also be provided in two, three, five, six, etc., with all the coil assemblies 52 connected in parallel between the two manifolds 51, and all the coil assemblies 52 arranged along the extension direction of the manifolds 51. The present invention does not make a specific limitation on the number of coil assemblies 52.

[0044] It is understood that each coil assembly 52 may have three, four, five, or more serpentine coils 522, with all serpentine coils 522 arranged along the extension direction perpendicular to the manifold 51. This embodiment does not specify the number of serpentine coils 522.

[0045] For ease of understanding, the following description will continue to use four sets of coil assemblies 52, each of which includes two serpentine coils 522.

[0046] See Figure 2 In this embodiment, all fins 523 are arranged in parallel on the serpentine coil 522. The serpentine coil 522 is used for heat exchange between the refrigerant and the external environment. The fins 523 can be used to enhance the heat exchange efficiency of the serpentine coil 522.

[0047] Preferably, each fin 523 is connected to two serpentine coils 522 and is perpendicular to the serpentine coils 522. Specifically, the fin 523 is provided with two spaced-apart through holes 5231, the center distance between the two through holes 5231 being equal to the axial distance between the two serpentine coils 522. The two serpentine coils 522 respectively pass through the two through holes 5231, thereby fixing the fin 523 to the serpentine coils 522 and ensuring that the fin 523 is perpendicular to the serpentine coils 522.

[0048] The above scheme enables each fin 523 to conduct heat at the same height and temperature level, thus avoiding or reducing the amount of thermal deformation caused by uneven heating of the fin 523.

[0049] See Figure 2 In this embodiment, the connector 521 is a tee connector 521'. The two ends of the two serpentine coils 522 are respectively connected to different connection ends of the two tee connectors 521'. The remaining last ends of the two tee connectors 521' are respectively connected to different manifolds 51. Specifically, the two ends of the first serpentine coil 522 are respectively connected to the first connection ends of the two tee connectors 521', the two ends of the second serpentine coil 522 are respectively connected to the second connection ends of the two tee connectors 521', and the third connection end of the tee connector 521' is connected to the manifold 51.

[0050] Specifically, the planes of the three connecting ends of the tee connector 521' are perpendicular to the axis of the manifold 51, so as to divide the fluid of one path into two parts and ensure that the flow rate of the serpentine coil 522 at the same height level is the same.

[0051] See Figure 2 Preferably, the tee connector 521' includes a U-shaped conduit 5211 and a straight pipe 5212 connected to the bottom of the U-shaped conduit 5211. The end of the straight pipe 5212 is welded to the manifold 51 to facilitate smoother fluid collection or diversion on the U-shaped conduit 5211 and reduce its flow resistance. The two ends of the U-shaped conduit 5211 are respectively inserted and fixed to the ends of different serpentine coils 522, and the axes of the two ends of the U-shaped conduit 5211 can be parallel to the axes of the serpentine coils 522 to facilitate their insertion and connection.

[0052] During assembly, the straight pipe 5212 of the tee connector 521' can be welded and fixed to the manifold 51 first, and the position of the tee connector 521' can be adjusted so that the planes of the three connecting ends of the tee connector 521' are perpendicular to the axis of the manifold 51. Then, the two ends of the U-shaped guide tube 5211 of the tee connector 521' are respectively inserted and mated with different serpentine coils 522. The final fixation between the U-shaped guide tube 5211 and the serpentine coil 522 can be achieved by welding, gluing, or heat treatment with an interference fit. The assembly method of welding the tee connector 521' first and then inserting the serpentine coil 522 makes the overall assembly and production of the cooler 5 simpler and more convenient, effectively ensures the readiness of the position of the tee connector 521', and improves the yield rate.

[0053] See Figure 2 In this embodiment, to avoid severe turbulence at the connection between the U-shaped conduit 5211 and the serpentine coil 522, the serpentine coil 522 includes a coil body 5221 and two insertion sleeves 5222 respectively connected to both ends of the coil body 5221. The inner diameter of the insertion sleeve 5222 is larger than the inner diameter of the coil body 5221, and the outer diameter of the insertion sleeve 5222 is larger than the outer diameter of the coil body 5221, forming a stepped structure. The end of the U-shaped conduit 5211 is inserted and fixed inside the insertion sleeve 5222. Preferably, the inner diameter of the U-shaped conduit 5211 is the same as the inner diameter of the coil body 5221, and the outer diameter of the U-shaped conduit 5211 is the same as the inner diameter of the insertion sleeve 5222.

[0054] Preferably, in order to facilitate the insertion and assembly between the U-shaped conduit 5211 and the insertion sleeve 5222, the end of the insertion sleeve 5222 away from the coil body 5221 is provided with an outwardly enlarging flared mouth 5223, which can serve as a insertion guide.

[0055] In other preferred embodiments, the tee connector 521' may also be generally Y-shaped, wherein the vertical tube in the Y-shaped tee connector 521' is welded to the manifold 51, and the two oblique tubes in the Y-shaped tee connector 521' are respectively connected to the insertion sleeves 5222 of different serpentine coils 522; in this case, in order to adapt to the shape change of the Y-shaped tee connector 521', the insertion sleeve 5222 will be set to an inclined shape.

[0056] Example 2

[0057] See Figure 4 The present invention discloses a thermoacoustic refrigeration refrigerator, which uses a cooler 5 as described in Example 1.

[0058] In this embodiment, the thermoacoustic refrigerator includes a refrigerator body 1, a thermoacoustic refrigerator 2, a low-temperature circulation loop 3, and a normal-temperature circulation loop 4. The thermoacoustic refrigerator 2 has a hot end 21 and a cold end 22; the low-temperature circulation loop 3 is configured to transfer the cooling energy from the cold end 22 into the refrigerator body 1 for refrigeration; and the normal-temperature circulation loop 4 is configured to dissipate waste heat from the hot end 21 to cool it.

[0059] Specifically, a cooler 5 as described in Example 1 is connected in series on the low-temperature circulation loop 3, and the cooler 5 is located inside the refrigerator body 1. In use, the low-temperature circulation loop 3 transfers the cold energy from the cold end 22 to the cooler 5, allowing the cooler 5 to exchange heat with the environment inside the refrigerator body 1, thereby achieving the purpose of refrigeration. Using the cooler 5 described in Example 1 as the cold end heat exchanger of the thermoacoustic refrigeration refrigerator can effectively reduce the energy consumption of the thermoacoustic refrigeration refrigerator, thus achieving energy saving.

[0060] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A thermo-acoustic refrigeration refrigerator, characterized in that, The application relates to a refrigerator, which comprises a refrigerator body, a thermoacoustic refrigerator with a hot end and a cold end, a low-temperature circulation loop and a normal-temperature circulation loop, wherein the low-temperature circulation loop is used for delivering cold energy of the cold end to the refrigerator body, a cooler is arranged on the low-temperature circulation loop and in the refrigerator body, and the normal-temperature circulation loop is used for dissipating waste heat of the hot end. The cooler comprises two parallel collecting pipes and a plurality of coil assemblies which are connected in parallel between the two collecting pipes, wherein the coil assemblies are arranged along the extension direction of the collecting pipes. The coil assembly comprises two connecting heads connected to different collecting pipes and a plurality of serpentine coils connected in parallel between the two connecting heads, wherein the serpentine coils are arranged along a direction perpendicular to the extension direction of the collecting pipes, and the axis of the serpentine coil is parallel to the axis of the collecting pipe. The serpentine coil of each coil assembly is provided with two three-way connectors, the two ends of the two serpentine coils are connected to different connecting ends of the two three-way connectors, and the plane of the three connecting ends of the three-way connector is perpendicular to the axis of the collecting pipe. The three-way connector comprises a U-shaped pipe and a straight pipe connected to the bottom of the U-shaped pipe, the end of the straight pipe is welded to the collecting pipe, the two ends of the U-shaped pipe are respectively inserted and fixed to the ends of different serpentine coils, the serpentine coil comprises a coil body and two insertion sleeves connected to the two ends of the coil body, the inner diameter of the insertion sleeve is larger than the inner diameter of the coil body, the outer diameter of the insertion sleeve is larger than the outer diameter of the coil body, the end of the U-shaped pipe is inserted and fixed in the insertion sleeve, and the end of the insertion sleeve away from the coil body is provided with an outwardly expanding flared mouth. The coil assembly further comprises a plurality of fins, and the fins are arranged in parallel on the serpentine coil.

2. The thermo-acoustic refrigerator according to claim 1, wherein, Each fin is connected to and perpendicular to the two serpentine coils.

3. The thermo-acoustic refrigerator according to claim 2, wherein, The fin is provided with two spaced-apart through holes, and the two serpentine coils are respectively fitted through the two through holes.

4. The thermo-acoustic refrigerator according to claim 3, wherein, ​

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