CN215675909U

CN215675909U - Novel refrigeration structure of cold head structure and applied this structure

Info

Publication number: CN215675909U
Application number: CN202022477051.7U
Authority: CN
Inventors: 姚宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-01
Filing date: 2020-11-01
Publication date: 2022-01-28
Anticipated expiration: 2030-11-01

Abstract

The utility model discloses a cold head structure and a novel refrigeration structure applying the same, wherein the cold head structure comprises a cold head shell, a piston cylinder body is fixedly connected at the bottom of the cold head shell in a hollow manner, a passage is arranged between the piston cylinder body and the cold head shell, the top of the piston cylinder body is of an open structure, an expansion piston head is arranged at the inner part of the piston cylinder body in a non-contact manner, the top of the expansion piston head is sealed, at least two expansion piston elastic pieces are connected at the lower side in parallel, the expansion piston elastic pieces are fixed with the inner wall of the piston cylinder body, a cold head connecting rod is fixed in the middle of the cold head connecting rod, the expansion piston head is connected at the top of the cold head connecting rod, and the center position of the bottom of the cold head connecting rod is fixed at a hollow connection part at the bottom side of the cold head shell. The utility model realizes the reciprocating motion of the piston through the fixation of the connecting rod and the reciprocation of the elastic sheet, is different from the traditional piston pushing motion of the reciprocating motion of the connecting rod, has independent integral structure, ensures the refrigeration effect, can reduce the volume and has higher integration level.

Description

Novel refrigeration structure of cold head structure and applied this structure

Technical Field

The utility model relates to the field of refrigeration, in particular to a cold head structure.

Background

Different from the traditional circulation theory, the circulation theory adopted by the thermoacoustic compressor is a more efficient thermodynamic theory, and the thermoacoustic compressor is more and more emphasized by technicians along with the continuous development of new technologies.

On the structural arrangement of the existing thermoacoustic refrigerator, the expansion piston is generally coaxially arranged with the piston rod of the power piston, and forms a gas suspension state to reduce friction, so that the high-efficiency operation of the existing thermoacoustic refrigeration structure can be formed.

And the expansion piston part and the power piston part of the traditional thermoacoustic compressor form a connected whole, and the bottom of the compressor is provided with a spring plate structure.

However, friction is difficult to avoid, and therefore, a new refrigeration structure needs to be developed, which can separate the two-part structure.

Disclosure of Invention

The utility model aims to solve the problems and provides a cold head structure, wherein the reciprocating motion of a piston is realized through the fixation of a connecting rod and the reciprocation of an elastic sheet, the cold head structure is different from the traditional piston driven by the reciprocating motion of the connecting rod, the whole structure is independent, the volume can be reduced while the refrigeration effect is ensured, and the integration level is higher.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a cold head structure, including the cold head casing, connect fixed piston cylinder body that is equipped with in its bottom fretwork, and be equipped with the route between piston cylinder body and the cold head casing, piston cylinder body top is opening structure and inside contactless expansion piston head that is equipped with, and expansion piston head top is sealed, the parallel at least twice expansion piston shell fragment that is connected with of downside, expansion piston shell fragment is fixed with piston cylinder body inner wall, self is fixed with the cold head connecting rod between two parties, and the expansion piston head is connected at the top to the cold head connecting rod, bottom central point puts the fretwork connecting portion that is fixed in cold head casing bottom side.

Further, the via gap was 5 mm.

Furthermore, a radiating fin is arranged on the lower side of the cold head shell, and a cooling end is arranged on the top side of the cold head shell.

Based on the cold head structure, a novel refrigeration structure is further developed.

The refrigeration structure is connected with the rotor structure through the connecting end at the bottom side of the cold head structure, and the cold head structure is arranged on one side or two sides of the rotor structure.

Further, the active cell structure includes active cell casing, and active cell casing inboard is equipped with the fixed bolster, and the fixed bolster is equipped with the power chamber between two parties, is equipped with power component in the power chamber, and the power piston head is connected to the connecting rod unilateral that power component link up or two sides, and the power piston head sets up in the cylinder liner with the inboard fixed of fixed bolster, and the connecting rod is fixed with the reed of cylinder liner bottom side, and active cell casing unilateral or two sides are equipped with and connect the opening.

Further, the power assembly comprises a coil arranged in the power cavity and a magnet arranged in the coil and connected with the coil in a penetrating manner through the connecting rod.

Further, the magnet reciprocates within the power chamber.

Further, a connecting rod connects the power piston head bilaterally.

Further, the power piston head and the connecting rod are fixed through bolts.

Further, the connecting rod is fixed with the spring plate in both directions.

Furthermore, the connection port is arranged on two sides and is an external fixed end.

Furthermore, helium gas with 3.5MPa is arranged in the rotor shell.

In summary, the utility model has the following advantages:

according to the cold head structure provided by the utility model, the reciprocating motion of the piston is realized through the fixation of the connecting rod and the reciprocation of the elastic sheet, the cold head structure is different from the traditional piston pushing motion by the reciprocating motion of the connecting rod, the whole structure is independent, the volume can be reduced while the refrigeration effect is ensured, and the integration level is higher.

In the refrigeration structure, the cold head and the rotor of the thermoacoustic compressor are separated, the effect of a double-head cold end can be formed, the expansion piston does not need to be coaxially arranged with a shaft rod of the expansion piston, the size is small, the double-head refrigeration is realized, the overall performance is better, and the selectivity is strong.

Drawings

FIG. 1 is a schematic diagram of a cold head configuration;

FIG. 2 is a schematic view of a novel refrigeration structure

Fig. 3 is a schematic view of a mover structure.

Detailed Description

The utility model is further described with reference to the following figures and examples:

example 1:

a cold head structure is shown in figure 1 and comprises a cold head shell 1-1, wherein a piston cylinder body 1-2 is fixedly connected at the bottom of the cold head shell in a hollow manner, a passage 1-4 is arranged between the piston cylinder body 1-2 and the cold head shell 1-1 and is used as a gas channel, and the gap is 5 mm.

It is worth noting that the hollow of the connecting end of the piston cylinder body 1-2 and the cold head shell 1-1 is a lateral hollow, namely a lateral flowing channel is formed for the gas.

With continued reference to fig. 1, the top of the piston cylinder 1-2 is open structure and the inside is provided with an expansion piston head 1-5 without contact, and the gap is smaller than that of the passage 1-4.

The gas circuit forms a circulation effect of external inlet and internal outlet.

The top of the expansion piston head 1-5 is sealed, the lower side of the expansion piston head is connected with at least two expansion piston elastic sheets 1-6 in parallel, in the embodiment, the number of the expansion piston elastic sheets is 2, the expansion piston elastic sheets 1-6 are fixed with the inner wall of the piston cylinder body, a cold head connecting rod 1-7 is fixed in the middle of the expansion piston elastic sheets, the top of the cold head connecting rod 1-7 is connected with the expansion piston head, and the center position of the lower side of the cold head connecting rod is fixed on a hollow connecting part 1-8 at the bottom side of the cold head shell 1-1.

The cold head connecting rod is fixed promptly, and the piston forms reciprocating motion because the effect cooperation power structure of piston shell fragment promotes gaseous flow, is different from the connecting rod drive reciprocating motion on the traditional structure, and its reciprocating contact's length is shorter, and frictional influence is littleer to refrigeration effect is more excellent.

Further, the lower side of the cold head shell 1-1 is provided with heat radiating fins 1-9, specifically the outer side, and the top side is provided with a cold conducting end 1-10, preferably red copper cold conducting.

Example 2:

this embodiment is a novel cold conduction structure, and the cold head structure in embodiment 1 is applied.

Specifically, the cold head structure is connected to the mover structure 100 through the connecting ends 1-11 at the bottom side, and the cold head structure is disposed on one side or both sides of the mover structure 100, in this embodiment, on both sides.

With continued reference to fig. 2, the mover structure includes a mover housing 1, and a heat dissipation structure, which may be a heat dissipation fin, is disposed outside the mover housing and is used for dissipating heat of the mover structure.

In the arrangement of the internal structure, the inner side of the rotor shell 1 is provided with a fixed support 2, the fixed support 2 is used as the supporting structure of the whole internal structure of the rotor, and a power cavity 21 is arranged in the middle position of the fixed support 2.

The power assembly 22 is arranged in the power cavity 21, and the connecting rod 221 through which the power assembly 22 passes is connected with the power piston head 3 on one side or on both sides.

In this embodiment, the connecting rod 221 is connected to the power piston head 3 on both sides, i.e. this embodiment can form a double-sided cold head, and realize double-sided cooling.

With continued reference to FIG. 1, power assembly 22 includes a coil 222 disposed within power chamber 21, and further includes a magnet 223 disposed within coil 222 and connected therethrough by a linkage 221, and magnet 223 reciprocates within power chamber 21.

Therefore, the connecting rod 221 can reciprocate in the whole fixing support 2, specifically, the connecting rod 221 is communicated with a through hole formed in the upper side and the lower side of the power cavity, and the power source is arranged in the power cavity, namely, the magnet is driven to move through the coil.

Under the drive of the connecting rod 221, the power piston head 3 arranged in the cylinder sleeve 4 fixed on the inner side of the fixed support 2 also moves, and the connecting rod 221 is fixed with the reed 5 on the bottom side of the cylinder sleeve 4, specifically, the central point is fixed, and the two sides are connected and fixed, so that the power piston head 3 connected on the two sides can reciprocate in the cylinder sleeve.

When the power shell is arranged on one side, the side without the cylinder sleeve is also fixed with a reed 5 which is fixed on the fixed support and used for realizing the reciprocating motion of the connecting rod while assisting the positioning, and the power shell is closed on the side.

It is noted that the power piston head 3 and the connecting rod 221 are fixed by bolts 7.

With continued reference to fig. 1, the mover housing 1 is provided with a connection port 6 on one or both sides, in this embodiment, on both sides, and is an external fixed end for connecting with a cold head end, i.e., an expansion piston end.

Helium gas of 3.5MPa is arranged in the whole rotor shell.

On the working mechanism of the structure, when the power piston head is driven by the coil to move towards the cold head, the reciprocating motion is realized by matching with the bidirectional elastic sheet, when the power piston head moves towards the cold head, the gas at the cold head part passes upwards outwards and downwards between the expansion piston and the cylinder body to form circulation, and at the moment, the expansion piston and the power piston head move relatively.

Therefore, the whole refrigeration structure is low in noise, the rotor part can be separated out, the effect of the double-end cold end can be formed, the expansion piston does not need to be coaxially arranged with a shaft rod of the expansion piston, and the whole performance is better

In conclusion, the cold head structure of this scheme is through the fixed of connecting rod to reciprocating motion through the shell fragment realizes the reciprocating motion of piston, is different from traditional connecting rod reciprocating motion and promotes the piston motion, and overall structure is independent, more can reduce the volume when guaranteeing refrigeration effect, and the integrated level is higher.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the utility model.

Claims

1. A cold head structure is characterized in that: comprises a cold head shell (1-1), wherein a piston cylinder body (1-2) is fixedly connected at the bottom of the cold head shell in a hollow manner, a passage (1-4) is arranged between the piston cylinder body (1-2) and the cold head shell (1-1), the top of the piston cylinder body (1-2) is of an open structure, an expansion piston head (1-5) is arranged in the piston cylinder body (1-2) in a non-contact manner, the top of the expansion piston head (1-5) is sealed, at least two expansion piston elastic sheets (1-6) are connected to the lower side in parallel, the expansion piston elastic sheets (1-6) are fixed in the piston cylinder body (1-2), a cold head connecting rod (1-7) is fixed in the middle of the expansion piston head (1-5), and the top of the cold head connecting rod (1-7) is connected with the expansion piston head (1-5), and the hollow connecting part (1-8) is fixed at the bottom center of the cold head shell (1-1).

2. A coldhead construction in accordance with claim 1, wherein: the gap between the passages (1-4) is 5 mm.

3. A coldhead construction in accordance with claim 1, wherein: the lower side of the cold head shell (1-1) is provided with radiating fins (1-9), and the top side is provided with a heat conducting end (1-10).

4. A novel refrigeration structure is characterized in that: including a coldhead structure according to any one of claims 1 to 3, connected to a mover structure (100) by connection ends (1 to 11) at the bottom side, the mover structure (100) being provided with the coldhead structure on one or both sides.

5. A novel refrigeration structure, as claimed in claim 4, wherein: the rotor structure (100) comprises a rotor shell (1), wherein a fixed support (2) is arranged on the inner side of the rotor shell (1), a power cavity (21) is arranged in the middle of the fixed support (2), a power assembly (22) is arranged in the power cavity (21), a power piston head (3) is connected to one side or two sides of a connecting rod (221) which is communicated with the power assembly (22), the power piston head (3) is arranged in a cylinder sleeve (4) which is fixed on the inner side of the fixed support (2), the connecting rod (221) is fixed with a reed (5) on the bottom side of the cylinder sleeve (4), and a connecting opening (6) is arranged on one side or two sides of the rotor shell (1) and the connecting end (1-11) is fixed.

6. A novel refrigeration structure as set forth in claim 5, wherein: the power assembly (22) comprises a coil (222) arranged in the power cavity (21) and a magnet (223) arranged inside the coil (222) and connected with the connecting rod (221) in a penetrating mode.

7. A novel refrigeration structure as set forth in claim 5, wherein: the power piston head (3) and the connecting rod (221) are fixed through a bolt (7).

8. A novel refrigeration structure, as claimed in claim 7, wherein: the connecting rod (221) is connected with the power piston head (3) at two sides.

9. A novel refrigeration structure as set forth in claim 8 wherein: the connecting rod (221) is fixed with the reed (5) in two directions.