Heat exchange device for dilution refrigeration
By connecting multiple heat-conducting parts between the fixed sleeve and the heat exchange sleeve, the problem of cold head vibration affecting the cooling effect is solved, and a more efficient cooling effect is achieved.
Patent Information
- Application Number
- CN202422707828.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-07
AI Technical Summary
In existing ultra-low temperature refrigeration equipment, the connection method between the cold head and the cold plate causes vibration to conduct heat, affecting the cooling effect and limiting the shock absorption effect.
Multiple evenly distributed heat-conducting parts are connected between the fixed sleeve and the heat exchange sleeve, and fixed connection is performed by copper bolts or copper braids to increase the contact area and form a stable connection by welding, and the heat-conducting parts are used to consume vibration energy.
It effectively consumes the vibration energy of the cold head, reduces or eliminates the interference of vibration on the cooling effect, and improves the cooling efficiency.
Smart Images
Figure CN223460623U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to dilution refrigeration equipment technical field especially relates to a heat exchange device for dilution refrigeration. BACKGROUND
[0002] At present, the front stage refrigerator of the extremely low temperature refrigeration equipment is usually pulse tube refrigerator or GM refrigerator, and the cold head of the refrigerant is connected with the cold disc through copper braid. When the refrigerator operates, slight vibration is generated, and the vibration can conduct heat in the extremely low temperature environment, which affects the refrigeration of the mixing chamber.
[0003] Although the connection mode of the cold head and the cold disc is soft connection, the vibration can be conducted to the cold disc through the copper braid, and the damping effect is limited in the conduction process.
[0004] From the above, it is obvious that the prior art has inconvenience and defects in actual use, so it is necessary to improve. UTILITY MODEL CONTENTS
[0005] In view of the above defects, the utility model mainly provides a heat exchange device for dilution refrigeration, which solves the technical problem of cold head vibration affecting refrigeration effect.
[0006] In order to solve the above problems, the utility model provides a heat exchange device for dilution refrigeration, which comprises a fixing sleeve for fixing the cold head; the fixing sleeve is externally sleeved with a heat exchange sleeve for connecting the cold disc; a plurality of uniformly distributed heat conducting pieces are connected between the fixing sleeve and the heat exchange sleeve.
[0007] According to the heat exchange device for dilution refrigeration of the utility model, the heat conducting piece is a copper bolt or copper braid.
[0008] According to the heat exchange device for dilution refrigeration of the utility model, the heat exchange sleeve is provided with a through hole, and a blind hole is formed on the outer wall of the fixing sleeve; the two ends of the heat conducting piece are respectively inserted into the through hole and the blind hole to form fixed connection.
[0009] According to the heat exchange device for dilution refrigeration of the utility model, the heat conducting piece is a copper braid, and the two ends thereof are respectively inserted into the through hole and the blind hole to form fixed connection by welding.
[0010] According to the heat exchange device for dilution refrigeration of the utility model, the fixing sleeve is provided with a wire harness hole which is opened through in the axial direction.
[0011] According to the heat exchange device for dilution refrigeration of the utility model, the fixing sleeve fixes the cold head by the way of hoop; the fixing sleeve and the fixed cold head are filled with low temperature grease.
[0012] The low-temperature grease is N-type low-temperature grease.
[0013] The heat exchange sleeve and the cold disc are connected through the supporting piece.
[0014] The supporting piece is a copper rod or a bellows.
[0015] The heat exchange sleeve is provided with supporting holes for connecting the supporting pieces.
[0016] In conclusion, the heat exchange device for dilution refrigeration is characterized in that a plurality of uniformly distributed heat conducting pieces are connected between the fixed sleeve and the heat exchange sleeve. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a structural schematic view of the utility model;
[0018] Figure 2 is a sectional view structural schematic view of the utility model;
[0019] Figure 3 is a top view structural schematic view of the utility model;
[0020] In the drawing: 1-heat exchange sleeve, 11-heat exchange pipe, 12-through hole, 13-supporting piece, 14-heat conducting piece, 15-supporting hole; 2-fixed sleeve, 21-wire harness hole; 3-cold head, 4-cold disc. DETAILED DESCRIPTION
[0021] Referring to Figure 1 The utility model provides a kind of heat exchange device for dilution refrigeration, including the fixed sleeve 2 for fixedly sleeving cold head 3;The external sleeve of the fixed sleeve 2 is sleeved with the heat exchange sleeve 1 for connecting cold disc 4;Combining Figure 3 A plurality of uniformly distributed heat conducting pieces 14 are connected between the fixed sleeve 2 and the heat exchange sleeve 1.
[0022] Preferably, the two ends of the heat conducting piece 14 are welded on the fixed sleeve 2 and the heat exchange sleeve 1 respectively; Good heat conduction effect.
[0023] When the cold head 3 of the refrigerator vibrates, the force direction of each heat conducting piece 14 is different, greatly consumes vibration energy, thereby reducing or even eliminating the interference of cold head vibration on refrigeration effect.
[0024] As an embodiment, the heat conducting piece 14 of the utility model is copper bolt, and the heat transfer effect is good.
[0025] As an embodiment, the heat conducting member 14 is a copper braid, which has good heat conductivity and certain flexibility. When vibrating, the copper braid is slightly deformed under stress, which can better consume vibration energy and prevent the cold head vibration from being transmitted to the cold plate 4.
[0026] In combination with Figure 2 As an embodiment, the heat exchange sleeve 1 is provided with a through hole 12, and the outer wall of the fixing sleeve 2 is provided with a blind hole. The two ends of the heat conducting member 14 are respectively inserted into the through hole 12 and the blind hole to form a fixed connection. The contact area of the connection point is increased, and the heat transfer effect is guaranteed.
[0027] Optionally, the two ends of the copper braid are inserted into the through hole 12 and the blind hole, and the fixed connection is formed by welding. The joint has high stability, large contact area and good heat conductivity. Optionally, the welding method is brazing.
[0028] As an embodiment, the fixing sleeve 2 is provided with a wire harness hole 21 which is axially and through. The wire harness hole 21 can accommodate the lead of a thermometer or the wire harness of a test sample, so that the wire harness is orderly arranged, and the heat conduction of the wire harness is reduced, and the cold loss is reduced.
[0029] Optionally, the fixing sleeve 2 of the utility model is fixed to the cold head 3 by a hoop. Further, the fixing sleeve 2 and the fixed cold head 3 are filled with low-temperature grease to guarantee the heat transfer effect. The low-temperature grease is preferably N-type low-temperature grease.
[0030] As an embodiment, the heat exchange sleeve 1 and the cold plate 4 are connected by a support 13.
[0031] The support 13 can be a copper rod, which has good heat transfer effect. It can also be a corrugated pipe, which can absorb vibration energy through the expansion and contraction deformation of the pipe body when vibrating.
[0032] Further, the heat exchange sleeve 1 is provided with a support hole 15 for connecting the support 13. The contact area of the joint is increased, and the heat conduction effect is guaranteed.
[0033] In summary, the utility model provides a heat exchange device for dilution refrigeration, which is connected with a plurality of uniformly distributed heat conducting members between the fixing sleeve and the heat exchange sleeve. When the cold head of the refrigerator vibrates, the stress directions of the heat conducting members are different, which greatly consumes vibration energy, thereby reducing or even eliminating the interference of the cold head vibration on the refrigeration effect.
[0034] Of course, the utility model can also have other various embodiments, and the skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but these corresponding changes and deformations should all belong to the protection scope of the claims attached to the utility model.
Claims
1. A heat exchange device for dilution refrigeration, characterized by The application relates to a fixing sleeve for fixing a sleeve-connected cold head; a heat exchange sleeve for connecting a cold plate is sleeved outside the fixing sleeve; and a plurality of uniformly distributed heat conducting members are connected between the fixing sleeve and the heat exchange sleeve.
2. The heat exchange device for dilution refrigeration of claim 1, wherein, The heat conducting member is a copper bolt or a copper braid.
3. The heat exchange device for dilution refrigeration of claim 1, wherein, The heat exchange sleeve is provided with a through hole, and the outer wall of the fixing sleeve is provided with a blind hole; the two ends of the heat conducting member are respectively inserted into the through hole and the blind hole to form a fixed connection.
4. The heat exchange device for dilution refrigeration of claim 3, wherein, The heat conducting member is a copper braid, the two ends of which are respectively inserted into the through hole and the blind hole to form a fixed connection by welding.
5. The heat exchange device for dilution refrigeration of claim 1, wherein, The fixing sleeve is provided with a wire harness hole which is axially and through.
6. The heat exchange device for dilution refrigeration of claim 1, wherein, The fixing sleeve is fixed to the cold head by a hoop; and low-temperature grease is filled between the fixing sleeve and the fixed cold head.
7. The heat exchange device for dilution refrigeration of claim 6, wherein, The low-temperature grease is N-type low-temperature grease.
8. The heat exchanger for dilution refrigeration of any of claims 1 to 7, wherein The heat exchange sleeve and the cold plate are connected by a supporting member.
9. The heat exchange device for dilution refrigeration of claim 8, wherein, The supporting member is a copper rod or a bellows.
10. The heat exchange device for dilution refrigeration of claim 8, wherein, The heat exchange sleeve is provided with a supporting hole for connecting the supporting member.