CN214276300U - Heater fixing device, cold head and refrigerator - Google Patents

Abstract

The utility model provides a heater fixing device, which comprises a heater, a transition transfer block and a heat-conducting medium; the heater is arranged on the secondary cold head through the transition transfer block, and the heat-conducting medium is arranged between the transition transfer block and the secondary cold head, so that the heater is conducted to the secondary cold head through the transition transfer block and the heat-conducting medium. Through set up heat-conducting medium between transition switching piece and second grade cold junction, both can guarantee the good contact between transition switching piece and the second grade cold junction in order to carry out the heat transfer, still avoided the excessive extrusion to the second grade cold junction in the installation. The utility model also provides a refrigerator that has above-mentioned heater fixing device's cold head and has above-mentioned cold head, it has above-mentioned beneficial effect equally.

Description

Heater fixing device, cold head and refrigerator

Technical Field

The utility model belongs to the technical field of the refrigerator, in particular to heater fixing device, cold head and refrigerator.

Background

In the conventional refrigerator on the superconducting magnet, a secondary cold head at the lower end of the refrigerator is directly and fixedly connected with the magnet and cannot be detached, and the refrigerator can only be maintained by replacing a piston of the refrigerator. The lower end cold head of the refrigerator is in a low-temperature state in the operation process, the refrigerator is directly disassembled at the moment, piston replacing air can enter a cylinder of the refrigerator, the piston and the cylinder are frozen together, the piston cannot be pulled out, and therefore a heater needs to be added on a secondary cold head of the refrigerator to assist in heating, and the refrigerator is heated to the normal temperature.

Because the refrigerator belongs to the precision instruments, the second grade cold head is as cylinder partly, and is very fragile, therefore fixed heater structure can not have excessive extrusion to the second grade cold head, avoids the second grade cold head to warp extrusion inside piston, leads to the piston card to die, and the refrigerator damages, and is effective rapidly for guaranteeing to heat, and heater fixed knot constructs and need contact well reliably with the second grade cold head, to sum up, heater fixed knot constructs to be fixed on the second grade cold head, can not excessively extrude the second grade cold head, still keeps contact well simultaneously.

Therefore, how to overcome the above technical defects is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heater fixing device, cold head and refrigerator have avoided in the installation to the excessive extrusion of second grade cold head, can also keep good contact simultaneously.

In order to solve the technical problem, the utility model provides a heater fixing device, which comprises a heater, a transition adapter block and a heat-conducting medium; wherein the content of the first and second substances,

the heater is arranged on the secondary cold head through the transition switching block, and the heat-conducting medium is arranged between the transition switching block and the secondary cold head, so that the heater is conducted to the secondary cold head through the transition switching block and the heat-conducting medium.

Optionally, the transition switching block is of a sleeve structure, and the transition switching block comprises two detachably connected shells.

Optionally, the two shells are connected in a clamping manner;

or the two shells are connected through a fixed connecting piece.

Optionally, the heat conducting medium is a heat conducting fin coated on the periphery of the secondary cold head.

Optionally, the heat conducting medium is a plurality of heat conducting fins.

Optionally, a butt gap is arranged between adjacent heat conducting fins.

Optionally, the heater is a cylinder, and the transition adapter block is provided with a mounting hole for accommodating the heater.

Optionally, in the locked state, the transition transfer block is in interference connection with the secondary cold head coated with the heat-conducting medium.

This scheme still provides a cold head, includes second grade cold head and heater fixing device, heater fixing device is as above heater fixing device.

The scheme also discloses a refrigerator, which comprises the cold head.

The utility model provides a heater fixing device, which comprises a heater, a transition transfer block and a heat-conducting medium; the heater is arranged on the secondary cold head through the transition transfer block, and the heat-conducting medium is arranged between the transition transfer block and the secondary cold head, so that the heater is conducted to the secondary cold head through the transition transfer block and the heat-conducting medium. Through set up heat-conducting medium between transition switching piece and second grade cold junction, both can guarantee the good contact between transition switching piece and the second grade cold junction in order to carry out the heat transfer, still avoided the excessive extrusion to the second grade cold junction in the installation.

The utility model discloses still provide a refrigerator that has above-mentioned heater fixing device's cold head and have above-mentioned cold head, consequently, it has above-mentioned beneficial effect equally, and here is no longer repeated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an assembly view of a cold head and heater fixing device according to an embodiment of the present invention;

fig. 2 is an assembly view of a cold head and heater fixing device provided in an embodiment of the present invention in a locked state;

FIG. 3 is an axial cross-sectional view of FIG. 2;

fig. 4 is an axial cross-sectional view of a cold head and heater fixing device according to an embodiment of the present invention before locking;

fig. 5 is an axial sectional view of the fixing device for a cold head and a heater provided by the embodiment of the present invention after locking.

The reference numerals in the above figures include:

a secondary cold head 1; a transition transfer block 2; a heater 3; a cold head 4; a fixed connecting piece 5; a heat transfer medium 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is more than two, and if there is a description that the first and the second are only used for distinguishing technical features, it is not understood that the relative importance is indicated or implied or the number of the indicated technical features is implicitly indicated or the precedence of the indicated technical features is implicitly indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The core of the utility model is to provide a heater fixing device, cold head and refrigerator, avoided the excessive extrusion to the second grade cold head in the installation, can also keep good contact simultaneously.

In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, the present invention provides a cold head, which includes a second-stage cold head 1 and a heater fixing device for heating the second-stage cold head 1.

The heater fixing device comprises a heater 3, a transition transfer block 2 and a heat-conducting medium 6; the heater 3 is arranged on the secondary cold head 1 through the transition transfer block 2, and the heat-conducting medium 6 is arranged between the transition transfer block 2 and the secondary cold head 1, so that the heater 3 is conducted to the secondary cold head 1 through the transition transfer block 2 and the heat-conducting medium 6.

It should be noted that the cold-conducting medium has good flexibility and thermal conductivity, and the effect is to fill the size deviation of transition transfer block 2 and second grade cold head 1 and tiny pit on the contact surface for second grade cold head 1 atress is even, avoids local atress to be extruded and warp, can also increase the area of conduction contact surface simultaneously, improves heat conduction efficiency.

Through set up heat-conducting medium 6 between transition switching piece 2 and second grade cold junction 1, both can guarantee the good contact between transition switching piece 2 and the second grade cold junction 1 in order to carry out the heat transfer, still avoided the excessive extrusion to the second grade cold junction in the installation.

In this embodiment, the transition transfer block 2 is a sleeve structure, and the transition transfer block 2 includes two detachably connected housings. The two shells can be buckled and connected through a buckle and can also be connected through a fixed connecting piece 5. Specifically, the fixed connecting piece 5 is a screw, as shown in fig. 1 and 2, threaded holes for connecting the screw are formed in the two shells, and the screw penetrates through the two shells to hold the transition junction block 2 and the secondary cold head 1 tightly. Of course, the transition transfer block 2 can be split into any shape and any number according to actual needs, and the transition transfer blocks 2 satisfying the above functions are all within the protection scope of the present solution.

In order to realize the close contact between the transition transfer block 2 and the secondary cold head 1, the heat-conducting medium 6 is designed to be a heat-conducting fin coated on the periphery of the secondary cold head 1. Specifically, the number of the heat conductive sheets is plural. A plurality of heat-conducting fins are spliced with each other and coated on the shaft of the secondary cold head 1. Further, a butt gap 601 is provided between adjacent heat-conducting sheets. The abutment gap 601 may extend in the axial direction.

The cold conducting medium has good heat conductivity and flexibility, is filled between the transition transfer block 2 and the secondary cold head 1, increases the heat conducting contact area, and improves the heat conducting efficiency. Specifically, the heat transfer medium 6 may be made of a soft metal material, or a heat transfer substance in a semi-solid liquid state, such as indium plate.

Under the locking state, the transition transfer block 2 is in interference connection with the secondary cold head 1 coated with the heat-conducting medium 6. That is, fill up flexible heat-conducting medium 6 between transition switching piece 2 and second grade cold junction 1, heat-conducting medium compression clearance is reserved in the design between transition switching piece 2, heat-conducting medium 6 compression is target in place the back transition switching piece 2 contact spacing each other, avoided installation process transition switching piece 2 transition extrusion second grade cold junction 1 to warp and lead to the refrigerator to damage, heat-conducting medium has good heat conductivity, fill and increased heat conduction area of contact between transition switching piece 2 and second grade cold junction 1, improve heat conduction efficiency. As shown in fig. 4, a represents the transition block gap between the two housings of the transition block 2 before locking. As shown in fig. 5, b indicates that the gap between the two housings of the transition block 2 disappears after locking, and the two housings contact each other.

As shown in fig. 3-5, the cold-conducting medium 6 is divided into two halves, and a gap is designed at the butt joint of the cold-conducting medium 6, i.e. the butt joint gap 601, and during the locking process of the transition transfer block 2, the cold-conducting medium 6 is extruded to generate a certain deformation and can overflow to both sides (i.e. move to the butt joint gap 601) so as to reduce the resistance of the cold-conducting medium 6 in the extrusion process and avoid the deformation caused by the overlarge stress of the secondary cold head 1.

In order to ensure the size precision of the transition transfer block 2, the transition transfer block 2 is processed by adopting a secondary processing technology. And reserving secondary machining allowance during the internal round hole during blanking preprocessing, then cutting the transition transfer block 2 into half and half, and finally splicing and fixing the transition transfer block 2, so that the internal round hole of the transition transfer block 2 is processed in place for the second time.

In this embodiment, the heater 3 is a cylinder, and the transition junction block 2 is provided with a mounting hole for accommodating the heater 3. The cylindrical surface contact surface of the mounting hole is large, and the contact heat conduction efficiency is high. The mounting holes may be glued to the heater 3, or may be connected to the heater 3 by other means. If the heater 3 adopts other shapes, correspondingly, the transition transfer block 2 can also adopt other accommodating cavities or direct connection modes to be connected for heat conduction. The number of the heaters 3 may be one or more, and is selected adaptively according to the actual application.

In addition, the application also discloses a cold head, which comprises a secondary cold head 1 and a heater fixing device, wherein the heater fixing device is the heater fixing device disclosed in the embodiment. Therefore, the cold head with the heater fixing device also has all the technical effects, and the details are not repeated.

The application also discloses a refrigerator, which comprises a cold head 4, wherein the cold head 4 is the cold head 4 disclosed in the embodiment. Therefore, the refrigerator with the cold head 4 also has all the technical effects described above, and the detailed description is omitted.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The fixing device of the heater is characterized by comprising a heater (3), a transition switching block (2) and a heat-conducting medium (6); wherein the content of the first and second substances,

the heater (3) is arranged on the secondary cold head (1) through the transition transfer block (2), the heat-conducting medium (6) is arranged between the transition transfer block (2) and the secondary cold head (1), and the heater (3) is conducted to the secondary cold head (1) through the transition transfer block (2) and the heat-conducting medium (6).

2. The heater fixture according to claim 1, wherein the transition block (2) is of a sleeve construction, the transition block (2) comprising two detachably connected housings.

3. The heater fixture device of claim 2, wherein the two housings are snap-fit connected;

or the two shells are connected through a fixed connecting piece (5).

4. The heater fixture according to claim 2, wherein the heat transfer medium (6) is a heat transfer fin wrapped around the outer periphery of the secondary cold head (1).

5. Heater fixture according to claim 4, characterized in that the heat conducting medium (6) is a plurality of heat conducting fins.

6. The heater fixture according to claim 5, wherein a butt gap (601) is provided between adjacent heat-conducting fins.

7. The heater fixture according to claim 1, wherein the heater (3) is a cylinder, and the transition junction block (2) is provided with a mounting hole for receiving the heater (3).

8. The heater fixture according to any one of claims 1-7, wherein in the locked state, the transition junction block (2) is in interference connection with the secondary cold head (1) coated with the heat transfer medium (6).

9. A coldhead, comprising a secondary coldhead (1) and a heater fixture as claimed in any one of claims 1 to 8.

10. A refrigerator, characterized by comprising a cold head (4) according to claim 9.

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