Heat exchange structure for dilution refrigerator
By employing a reverse spiral flow channel and flow channel structure, along with a silver cake design, in the dilution chiller, the problems of low efficiency and insufficient space utilization in traditional heat exchangers are solved, achieving efficient heat exchange and system compactness, and improving the overall performance of the dilution chiller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional dilution refrigerators suffer from low heat exchange efficiency, insufficient space utilization, and high thermal resistance, which limits their application and development in fields such as low-temperature physics experiments, quantum computing, and superconducting materials research.
A reverse spiral flow channel and flow channel structure were designed, which combined with a silver disc with high thermal conductivity. The spiral flow channel increases the heat exchange area and optimizes space utilization, the silver disc improves heat exchange efficiency, and the sealing material reduces heat loss.
It improves the heat exchange efficiency of hot and cold fluids, saves space, achieves dual optimization of efficient heat exchange and space utilization, and reduces system energy consumption and operating costs.
Smart Images
Figure CN224094975U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of dilution refrigerator, concretely is a kind of heat exchange structure for dilution refrigerator. BACKGROUND
[0002] In the field of dilution refrigerator technology, as one of the key components, the performance of heat exchanger directly affects the overall efficiency and stability of dilution refrigerator. Traditional heat exchanger design often has low heat exchange efficiency, insufficient space utilization and high thermal resistance and other problems, which limits the application and development of dilution refrigerator in the field of low temperature physical experiment, quantum computing, superconducting material research and other fields.
[0003] Specifically, the traditional heat exchanger usually adopts straight line type or simple curve guide groove design, this design although simple structure, but heat exchange area is limited, the heat exchange between cold and hot fluid is insufficient, heat exchange efficiency is difficult to improve. At the same time, due to the limitation of space layout, traditional heat exchanger is difficult to realize efficient heat exchange in limited space, further reduces the space utilization. In addition, the traditional heat exchanger often has the problem of high thermal resistance in material selection and structure design, which affects the effective transfer of heat, increases the energy consumption and operating cost of system. SUMMARY
[0004] In order to solve the above technical problems, the utility model provides a kind of heat exchange structure for dilution refrigerator, to solve the problem of low heat exchange efficiency of heat exchanger for dilution refrigerator in prior art due to design limitation, limited heat exchange area, resulting in insufficient heat exchange between cold and hot fluid.
[0005] A kind of heat exchange structure for dilution refrigerator, including heat exchange mechanism, the upper side of the heat exchange mechanism is fixedly installed with upper cover, the lower side of the heat exchange mechanism is fixedly installed with lower cover;
[0006] The heat exchange mechanism includes heat exchange component, the heat exchange component includes heat exchanger body, the upper end of the heat exchanger body is fixedly installed with connecting pipe one near the middle position, the lower end of the heat exchanger body is fixedly installed with connecting pipe two near the middle position, the upper side of the heat exchanger body is equipped with guide groove one, the lower side of the heat exchanger body is equipped with guide groove two;
[0007] The contact surface shared by the guide groove one and guide groove two is heat exchange surface, the heat exchange surface adopts heat conducting material;
[0008] The medium in the guide groove one and guide groove two exchanges heat through heat exchange surface;
[0009] Fluid into connecting pipe two is guided out by upper cover after guide groove one, fluid into connecting pipe one is guided out by lower cover after guide groove two.
[0010] Preferably, the upper cover comprises an upper cover body, a through hole one is arranged on the upper cover body near the middle, and a connecting pipe three is fixedly installed on the upper side edge of the upper cover body;
[0011] The lower cover comprises a lower cover body, a through hole two is arranged on the lower cover body near the middle, and a connecting pipe four is fixedly installed on the lower side edge of the lower cover body;
[0012] The upper cover body is fixedly installed on the upper surface of the heat exchange assembly, the lower cover body is fixedly installed on the lower surface of the heat exchange assembly, the connecting pipe one penetrates through the through hole one, and the connecting pipe two penetrates through the through hole two;
[0013] The flow guide groove one is spiral-shaped, the connecting pipe three and the upper slot opening position of the outer end of the flow guide groove one are communicated with each other, and the connecting pipe two and the lower slot opening position of the inner end of the flow guide groove one are communicated with each other;
[0014] The flow guide groove two is spiral-shaped, the connecting pipe four and the lower slot opening position of the outer end of the flow guide groove two are communicated with each other, and the connecting pipe one and the upper slot opening position of the inner end of the flow guide groove two are communicated with each other.
[0015] Preferably, the inside of the flow guide groove one is fixedly provided with a silver disc one, and the inside of the flow guide groove two is fixedly provided with a silver disc two.
[0016] Preferably, the upper cover body and the lower cover body are made of heat insulation materials.
[0017] Compared with the prior art, the heat exchanger has the following beneficial effects:
[0018] By designing the reverse spiral-shaped flow guide groove one and the flow guide groove two, the heat exchange area is greatly increased, so that the cold and hot fluids can be more fully contacted in the flowing process, thereby improving the heat exchange efficiency;
[0019] The reverse spiral design not only improves the heat exchange efficiency, but also effectively saves the space, and in the same volume, the spiral-shaped flow guide groove can provide a longer flow path and a larger heat exchange area, thereby realizing the double optimization of efficient heat exchange and space utilization;
[0020] The heat exchanger integrates multiple parts such as the upper cover, the lower cover and the heat exchange assembly, and can be connected with the helium supply device, the dilution refrigerator mixing chamber and the helium recovery device through simple connecting pipes. This design improves the integration of the system, so that the whole refrigeration system is more compact and efficient;
[0021] By fixing the silver disc one and the silver disc two in the flow guide groove, the high thermal conductivity and the pore structure thereof are utilized, and the heat exchange capacity is further enhanced, so that the heat exchange efficiency is significantly improved. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is an exploded structural diagram of the present invention;
[0024] Figure 3 This is a schematic diagram of the heat exchange component of this utility model;
[0025] Figure 4 This is a cross-sectional view of the heat exchange component of this utility model;
[0026] Figure 5 This is a top view of the heat exchange component of this utility model.
[0027] In the diagram: 1. Heat exchange mechanism; 11. Heat exchange component; 111. Heat exchanger body; 112. Connecting pipe one; 113. Connecting pipe two; 114. Flow guide channel one; 115. Flow guide channel two; 116. Heat exchange surface; 12. Silver disc one; 13. Silver disc two; 2. Upper cover; 21. Upper cover body; 22. Through hole one; 23. Connecting pipe three; 3. Lower cover; 31. Lower cover body; 32. Through hole two; 33. Connecting pipe four. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] like Figures 1 to 4 As shown:
[0030] Example 1: This utility model provides a heat exchange structure for a dilution refrigeration machine, including a heat exchange mechanism 1, an upper cover 2 fixedly installed on the upper side of the heat exchange mechanism 1, and a lower cover 3 fixedly installed on the lower side of the heat exchange mechanism 1.
[0031] The heat exchange mechanism 1 includes a heat exchange component 11, which includes a heat exchanger body 111. A connecting pipe 112 is fixedly installed at the upper end of the heat exchanger body 111 near the middle position, and a connecting pipe 2 113 is fixedly installed at the lower end of the heat exchanger body 111 near the middle position. A guide groove 114 is opened on the upper side of the heat exchanger body 111, and a guide groove 2 115 is opened on the lower side of the heat exchanger body 111.
[0032] The upper cover 2 includes an upper cover body 21. A through hole 22 is provided on the upper cover body 21 near the middle position. A connecting pipe 23 is fixedly installed on the upper edge of the upper cover body 21.
[0033] The lower cover 3 includes a lower cover body 31. A through hole 32 is provided on the lower cover body 31 near the middle position. A connecting pipe 33 is fixedly installed on the lower edge of the lower cover body 31.
[0034] The upper cover body 21 is fixedly installed on the upper surface of the heat exchange component 11, and the lower cover body 31 is fixedly installed on the lower surface of the heat exchange component 11. The first connecting pipe 112 passes through the first through hole 22, and the second connecting pipe 113 passes through the second through hole 32.
[0035] The flow guide channel 114 is spiral-shaped. The upper opening of the outer end of the connecting pipe 23 and the outer end of the flow guide channel 114 are connected to each other, and the lower opening of the inner end of the connecting pipe 213 and the inner end of the flow guide channel 114 are connected to each other.
[0036] The second guide channel 115 is spiral-shaped. The fourth connecting pipe 33 and the lower opening of the outer end of the second guide channel 115 are connected to each other. The first connecting pipe 112 and the upper opening of the inner end of the second guide channel 115 are connected to each other.
[0037] As can be seen from the above, when in use, connect pipe 112 to the helium supply equipment, connect pipe 213 to the helium outlet of the mixing chamber of the dilution refrigerator, connect pipe 323 to the helium recovery equipment, and connect pipe 433 to the helium inlet of the mixing chamber of the dilution refrigerator.
[0038] Turn on the helium supply equipment. The helium supply equipment will guide helium into the flow channel 115 through the connecting pipe 112, and then into the mixing chamber of the dilution refrigerator through the connecting pipe 33. At the same time, the helium in the mixing chamber of the dilution refrigerator will be guided into the flow channel 114 through the connecting pipe 213, and then into the helium recovery equipment through the connecting pipe 23.
[0039] When the two flow, heat exchange can be carried out through the heat exchanger body 111. Since the heat exchange area between the first guide channel 114 and the second guide channel 115 is greatly increased by the reverse spiral design, space is greatly saved and heat exchange efficiency is improved.
[0040] like Figures 2 to 5 As shown:
[0041] Example 2: This example is basically the same as the previous example, except that a silver cake 12 is fixed inside the first guide channel 114, and a silver cake 13 is fixed inside the second guide channel 115.
[0042] Among them, both Silver Ingot 12 and Silver Ingot 2 can be fixed to the corresponding guide groove by thermal adhesive;
[0043] Silver cake 12 and silver cake 23 can rapidly absorb heat from helium during the heat exchange process, improving heat exchange efficiency. The porous structure inside the sintered silver cake facilitates helium flow and further reduces thermal resistance.
[0044] Among them, Silver Ingot 12 and Silver Ingot 2 are both made of silver powder with a purity of more than 99.999%. The high purity of the silver material reduces the influence of impurities on heat conduction, thereby reducing thermal resistance.
[0045] Specifically, both the upper cover body 21 and the lower cover body 31 are made of heat-insulating material.
[0046] Specifically, the contact surface shared by the first guide channel 114 and the second guide channel 115 is the heat exchange surface 116, which is made of a thermally conductive material.
[0047] As can be seen from the above, during operation, the helium supply equipment introduces helium into the guide channel 115 through the connecting pipe 112 and flows through the silver cake 13; at the same time, the low-temperature helium gas exported from the mixing chamber of the dilution refrigerator enters the guide channel 114 through the connecting pipe 113 and flows through the silver cake 12; the silver cake 12 and the silver cake 13 exchange heat using the heat exchange surface 116, thereby rapidly cooling the silver cake 13, so that the helium in the guide channel 115 is cooled down and enters the dilution refrigerator through the helium inlet of the mixing chamber of the dilution refrigerator;
[0048] During this process, the heat insulation materials of the upper cover body 21 and the lower cover body 31 effectively reduce heat loss, while the heat exchange surface 116 of the heat-conducting material shared by the first guide channel 114 and the second guide channel 115 ensures efficient heat transfer.
[0049] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.
[0050] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.
[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication 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 utility model according to the specific circumstances.
[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0054] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A heat exchange structure for a dilution refrigerator, characterized in that, It includes a heat exchange mechanism (1), an upper cover (2) is fixedly installed on the upper side of the heat exchange mechanism (1), and a lower cover (3) is fixedly installed on the lower side of the heat exchange mechanism (1); The heat exchange mechanism (1) includes a heat exchange component (11), which includes a heat exchanger body (111). A connecting pipe (112) is fixedly installed at the upper end of the heat exchanger body (111) near the middle position. A connecting pipe (113) is fixedly installed at the lower end of the heat exchanger body (111) near the middle position. A guide groove (114) is opened on the upper side of the heat exchanger body (111), and a guide groove (115) is opened on the lower side of the heat exchanger body (111). The common contact surface of the first guide channel (114) and the second guide channel (115) is the heat exchange surface (116), and the heat exchange surface (116) is made of a thermally conductive material. The media in the first guide channel (114) and the second guide channel (115) exchange heat through the heat exchange surface (116); The fluid entering the second connecting pipe (113) is discharged through the upper cover (2) after passing through the first guide channel (114), and the fluid entering the first connecting pipe (112) is discharged through the lower cover (3) after passing through the second guide channel (115).
2. The heat exchange structure for a dilution refrigerator as described in claim 1, characterized in that, The upper cover (2) includes an upper cover body (21), and a through hole (22) is provided on the upper cover body (21) near the middle position. A connecting pipe (23) is fixedly installed on the upper edge of the upper cover body (21). The lower cover (3) includes a lower cover body (31), and a through hole (32) is provided on the lower cover body (31) near the middle position. A connecting pipe (33) is fixedly installed on the lower edge of the lower cover body (31). The upper cover body (21) is fixedly installed on the upper surface of the heat exchange component (11), the lower cover body (31) is fixedly installed on the lower surface of the heat exchange component (11), the first connecting pipe (112) passes through the first through hole (22), and the second connecting pipe (113) passes through the second through hole (32). The first guide channel (114) is spiral-shaped. The upper slot of the outer end of the third connecting pipe (23) and the first guide channel (114) are connected to each other. The lower slot of the inner end of the second connecting pipe (113) and the first guide channel (114) are connected to each other. The second guide channel (115) is spiral-shaped. The lower slot of the outer end of the fourth connecting pipe (33) and the second guide channel (115) are connected to each other. The upper slot of the inner end of the first connecting pipe (112) and the second guide channel (115) are connected to each other.
3. The heat exchange structure for a dilution refrigerator as described in claim 2, characterized in that, Silver cake one (12) is fixed inside the first guide channel (114), and silver cake two (13) is fixed inside the second guide channel (115).
4. The heat exchange structure for a dilution refrigerator as described in claim 2, characterized in that, Both the upper cover body (21) and the lower cover body (31) are made of heat-insulating material.