A regenerator and a refrigerator

Abstract

The present invention discloses a regenerator and a refrigerator, which includes a heat exchange chamber. The heat exchange chamber is divided into a first filling zone, a second filling zone, and a third filling zone along the axial direction of the regenerator. Lead balls are filled in the first filling zone. Holmium copper balls and gadolinium oxysulfide balls are filled in the second filling zone, and the diameter of the holmium copper balls is smaller than that of the gadolinium oxysulfide balls. Gadolinium oxysulfide balls are filled in the third filling zone. By reasonably setting the distribution of the refrigeration medium and the composition of the refrigeration medium, the regenerator divides the temperature range from 10K to 4K into two stages to improve the refrigeration efficiency of the regenerator in the temperature range from 10K to 4K.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and particularly to a regenerator and a refrigerator. Background Art

[0002] The 4K GM refrigerator needs to achieve the refrigeration effect from room temperature to the 4K temperature range. Generally, the regenerator in the existing refrigerant uses phosphor bronze mesh or stainless steel mesh to achieve refrigeration from room temperature to the 40K temperature range, uses lead ball particles to achieve refrigeration from the 40K temperature range to the 10K temperature range, and generally uses holmium copper balls or / and gadolinium oxysulfide balls with a diameter of 0.15 mm - 1.0 mm to achieve refrigeration from the 10K temperature range to the 4K temperature range.

[0003] Under the limitation of objective physical laws, the lower the temperature range, the greater the difficulty of refrigeration. The factors affecting the refrigeration capacity of the regenerator include the surface area of the refrigeration medium, the heat capacity of the refrigeration medium, etc. At present, the main means to improve the refrigeration capacity of the regenerator is to increase the amount of the refrigeration medium. However, due to the limitation of the performance of the compression mechanism, the volume of the cavity where the refrigeration medium is located cannot be infinitely expanded. How to increase the refrigeration capacity per unit volume of the regenerator is one of the main problems encountered in the current design of the regenerator. Summary of the Invention

[0004] In order to overcome the defects of the existing regenerator, the present invention provides a regenerator and a refrigerator, which divide the temperature range from 10K to 4K into two stages by reasonably setting the distribution of the refrigeration medium and the composition of the refrigeration medium, so as to improve the refrigeration efficiency of the regenerator in the temperature range from 10K to 4K.

[0005] Correspondingly, the present invention provides a regenerator, including a heat exchange cavity, and the heat exchange cavity is divided into a first filling area, a second filling area and a third filling area along the axial direction of the regenerator;

[0006] Lead balls are filled in the first filling area;

[0007] Holmium copper balls and gadolinium oxysulfide balls are filled in the second filling area, and the diameter of the holmium copper balls is smaller than that of the gadolinium oxysulfide balls;

[0008] Gadolinium oxysulfide balls are filled in the third filling area.

[0009] In an optional embodiment, the diameter of the lead balls in the first filling area ranges from 0.2 mm to 0.5 mm.

[0010] In an optional embodiment, the diameter of the holmium copper balls in the second filling area ranges from 0.053 mm to 0.15 mm.

[0011] Alternative embodiment, the diameter of the gadolinium oxysulfide spheres in the second filling zone ranges from 0.2 mm to 0.5 mm.

[0012] Alternative embodiment, the diameter of the gadolinium oxysulfide spheres in the third filling zone ranges from 0.2 mm to 0.5 mm.

[0013] Alternative embodiment, the volume ratio of the holmium copper spheres in the second filling zone is at least 30%, and the volume ratio of the gadolinium oxysulfide spheres in the second filling zone is at least 30%.

[0014] Alternative embodiment, the holmium copper spheres are made based on a vacuum atomization process.

[0015] Alternative embodiment, further comprising a cold storage shell and a flow disturbance mechanism;

[0016] The flow disturbance mechanism includes a flow disturbance tube wall, a forward swing piece and a reverse swing piece.

[0017] The heat exchange cavity is arranged inside the flow disturbance tube wall, and a number of through holes smaller than the diameter of the heat exchange medium are opened on the flow disturbance tube wall; there is a swing piece gap between the flow disturbance tube wall and the cold storage shell, the width of the swing piece gap is L, and the lengths of the forward swing piece and the reverse swing piece are respectively greater than L;

[0018] The forward swing piece and the reverse swing piece are respectively hinged on the inner wall of the cold storage shell, and the forward swing piece and the reverse swing piece face in opposite directions.

[0019] Correspondingly, the present invention also provides a refrigerator, including the cold storage device described in any one of the above.

[0020] In summary, the present invention provides a cold storage device and a refrigerator. The cold storage device realizes external refrigeration through multiple filling zones in sequence. By filling smaller-diameter holmium copper spheres in the gadolinium oxysulfide spheres, the refrigeration efficiency can be improved; a flow disturbance mechanism is added, which can change the heat exchange cavity to make the flow of the heat exchange medium, give full play to the heat exchange performance of the heat exchange medium in each area, improve the heat exchange efficiency and avoid the insufficient use of the heat exchange medium, and improve the refrigeration efficiency of the cold storage device. Description of the Drawings

[0021] Figure 1 It is a schematic cross-sectional structure diagram of the cold storage device according to the embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the cold storage device according to the embodiment of the present invention. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of electroplating of the present invention.

[0024] Embodiment 1:

[0025] Figure 1 The schematic cross-sectional structure diagram of the regenerator in the embodiment of the present invention is shown.

[0026] The present invention provides a regenerator, including a heat exchange cavity, and the heat exchange cavity is divided into a first filling area 101, a second filling area 102, and a third filling area 103 along the axial direction of the regenerator;

[0027] Lead balls are filled in the first filling area 101;

[0028] Holmium copper balls and gadolinium oxysulfide balls are filled in the second filling area 102, and the diameter of the holmium copper balls is smaller than the diameter of the gadolinium oxysulfide balls;

[0029] Gadolinium oxysulfide balls are filled in the third filling area 103.

[0030] Specifically, the factors affecting the heat storage and release of the regenerator include factors such as the heat capacity and the total heat exchange surface area of the heat exchange particles inside the regenerator. Specifically, in the embodiment of the present invention, starting from the heat exchange medium inlet 110 of the refrigerator, a first filling area 101, a second filling area 102, and a third filling area 103 are respectively arranged along the axial direction.

[0031] Specifically, lead balls are filled in the first filling area 101. Preferably, the diameter of the lead balls ranges from 0.2 mm to 0.5 mm. Specifically, the first filling area 101 is mainly responsible for refrigeration in the temperature range of 40K to 10K.

[0032] Specifically, the second filling area 102 is filled with holmium copper balls and gadolinium oxysulfide balls. The diameter of the holmium copper balls is smaller than that of the gadolinium oxysulfide balls. Preferably, the diameter of the holmium copper balls in the second filling area ranges from 0.053 mm to 0.15 mm, and the diameter range of the gadolinium oxysulfide balls in the second filling area is from 0.2 mm to 0.5 mm. Specifically, the second filling area 102 is mainly used for the first-stage refrigeration from 10K to 4K. Specifically, considering cost and efficiency, the conventional processing diameter and the used diameter of the gadolinium oxysulfide balls are 0.2 mm to 0.5 mm. When filling the space with gadolinium oxysulfide balls, the volume occupied by the gaps can reach 30% of the volume of the gadolinium oxysulfide balls. Since the refrigeration of the refrigerator is related to the total surface area of the refrigeration medium, the volume occupied by the gaps severely restricts the refrigeration capacity per unit volume of the refrigerator. Therefore, in the embodiment of the present invention, the gaps between the gadolinium oxysulfide balls can be filled with holmium copper balls, and the diameter range of the holmium copper balls is 0.053 mm to 0.15 mm. The starting point of this implementation method is determined by the forming method of the holmium copper balls. As a rare alloy material, due to its own characteristics, if the holmium copper material needs to be processed into larger-sized particles (such as 0.2 mm to 0.5 mm), the preparation cost is high and the material loss is serious; if only powdered holmium copper material is needed (the conventional size of the powder is within 0.1 mm, and when the processing conditions are relaxed, holmium copper powder of the 0.15 mm size level will appear), there are many low-cost methods to achieve it, such as the vacuum gas atomization process. Specifically, the preparation of the holmium copper alloy is made by adding rare earth at high temperature in the liquid state and making the rare earth evenly distributed and then solidifying. The vacuum gas atomization process needs to go through three steps: melting the metal into a liquid, dispersing the metal liquid into droplets, and condensing the droplets into solid powder particles. By using the vacuum gas atomization process, the preparation of the holmium copper balls can be completed directly from the preparation of the raw materials at one time, reducing the intermediate processes. In addition, since the vacuum gas atomization process is carried out in a vacuum environment, on the one hand, the roundness and size uniformity of the produced holmium copper balls are better, and the quality of the produced holmium copper balls is better. On the other hand, no by-products and impurities are generated during the production process, the post-treatment of the holmium copper balls is simple, and the purity of the holmium copper balls is high.

[0033] Specifically, in actual implementation, the volume ratio of the holmium copper balls in the second filling area 102 is at least 30%, and the volume ratio of the gadolinium oxysulfide balls in the second filling area is at least 30%.

[0034] Specifically, the third filling area 103 is filled with gadolinium oxysulfide balls. Preferably, the diameter range of the gadolinium oxysulfide balls in the third filling area is from 0.2 mm to 0.5 mm, that is, the gadolinium oxysulfide balls in the third filling area and the gadolinium oxysulfide balls in the second filling area can be of the same substance.

[0035] Specifically, referring to the attached drawings Figure 1, in the embodiments of the present invention, regarding the external structure of the regenerator, structures such as the regenerator housing 100 are the same as those of the existing regenerator, and the embodiments of the present invention will not repeat the description.

[0036] Embodiment 2:

[0037] Figure 2 Shows a schematic cross-sectional structure diagram of the regenerator according to the embodiment of the present invention.

[0038] On the basis of Embodiment 1, the embodiment of the present invention adds a flow disturbing mechanism inside the regenerator housing 100.

[0039] Specifically, the heat exchange medium enters the heat exchange chamber from the heat exchange medium inlet. The flow rate of the heat exchange medium near the axis of the heat exchange chamber is faster than that on both sides. When the heat exchange medium impacts the bottom of the heat exchange chamber, turbulence will be generated, making the heat exchange between the heat exchange medium and the gadolinium sulfate oxide balls in the third filling area 103 more efficient; Holmium copper balls are filled in the gaps in the second filling area 102, reducing the fluid passing through the gaps in the second filling area 102, and initially dispersing the heat exchange medium to improve the heat exchange efficiency; further, in order to reduce the flow rate of the heat exchange medium at the axis position of the heat exchange chamber, enabling the heat exchange media in each area to fully exert the heat exchange effect and improve the heat distribution uniformity, the embodiment of the present invention adds a flow disturbing mechanism inside the regenerator housing 100. Specifically, the flow disturbing mechanism includes a flow disturbing pipe wall 200, a forward swing piece 201, and a reverse swing piece 202.

[0040] The heat exchange chamber is arranged inside the flow disturbing pipe wall 200. A number of through holes smaller than the diameter of the heat exchange medium are opened on the flow disturbing pipe wall 200; there is a swing piece gap between the flow disturbing pipe wall 200 and the regenerator housing 100, and the width of the swing piece gap is L. The lengths of the forward swing piece 201 and the reverse swing piece 202 are both greater than L; specifically, the forward swing piece 201 and the reverse swing piece 202 are respectively hinged on the inner wall of the regenerator housing 100, and the forward swing piece 201 and the reverse swing piece 202 face in opposite directions.

[0041] When the regenerator operates, the heat exchange medium will flow out of the through holes into the swing piece gap. The forward swing piece 201 and the reverse swing piece 202 will randomly swing under the disturbance of the heat exchange medium fluid, interfering (hindering) with the heat exchange medium, and causing some of the heat exchange medium to return to the flow disturbing pipe wall 200, interfering with the movement of the heat exchange medium inside the original flow disturbing pipe wall 200. Under the influence of irregular interference, the chaos degree of the heat exchange medium flow inside the flow disturbing pipe wall 200 increases, and the statistical average refrigeration effect in each area increases.

[0042] In addition, since the number of forward swing pieces 201 and reverse swing pieces 202 is large, under irregular movement, although it will cause local vibration of the regenerator, due to the non-uniform movement, the vibration situation will not be too serious. By adding a soft coating outside the swing piece and wrapping the outer shell with sound-absorbing materials, the noise situation can be reduced to the normal level to meet the use requirements.

[0043] Embodiment 3:

[0044] The embodiment of the present invention also provides a refrigerating machine, which includes one of the aforementioned regenerators.

[0045] In summary, the embodiment of the present invention provides a regenerator and a refrigerating machine. The regenerator realizes external refrigeration through multiple-stage filling areas in sequence. By filling holmium copper balls with a smaller diameter in gadolinium sulfide oxide balls, the refrigeration efficiency can be improved; a flow disturbing mechanism is added to change the heat exchange cavity to make the flow of the heat exchange medium, giving full play to the heat exchange performance of the heat exchange medium in each area, improving the heat exchange efficiency and avoiding the insufficient use of the heat exchange medium, and improving the refrigeration efficiency of the regenerator.

[0046] By improving the composition and materials of the heat exchange medium of the regenerator, the refrigeration efficiency per unit volume of the regenerator is improved, and it has good practicability.

[0047] The above has introduced in detail a regenerator and a refrigerating machine provided by the embodiment of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A regenerator, characterized in that, it includes a heat exchange chamber, and the heat exchange chamber is divided into a first filling area, a second filling area and a third filling area along the axial direction of the regenerator; lead balls are filled in the first filling area; holmium copper balls and gadolinium oxysulfide balls are filled in the second filling area, and the diameter of the holmium copper balls is smaller than the diameter of the gadolinium oxysulfide balls; gadolinium oxysulfide balls are filled in the third filling area; the volume ratio of the holmium copper balls in the second filling area is at least 30%, and the volume ratio of the gadolinium oxysulfide balls in the second filling area is at least 30%; it further includes a regenerator housing and a flow disturbance mechanism; the flow disturbance mechanism includes a flow disturbance pipe wall, a forward swing piece and a reverse swing piece; the heat exchange chamber is arranged inside the flow disturbance pipe wall, and a number of through holes smaller than the diameter of the heat exchange medium are opened on the flow disturbance pipe wall; there is a swing piece gap between the flow disturbance pipe wall and the regenerator housing, the width of the swing piece gap is L, and the lengths of the forward swing piece and the reverse swing piece are respectively greater than L; the forward swing piece and the reverse swing piece are respectively hinged on the inner wall of the regenerator housing, and the orientations of the forward swing piece and the reverse swing piece are opposite; the diameter of the holmium copper balls in the second filling area ranges from 0.053 mm to 0.15 mm, and the holmium copper balls are formed by a vacuum atomization process, and the vacuum atomization process needs to obtain the holmium copper balls by melting the metal into a liquid, dispersing the metal liquid into droplets, and condensing the droplets into solid powder particles.

2. The regenerator according to claim 1, characterized in that, the diameter of the lead balls in the first filling area ranges from 0.2 mm to 0.5 mm.

3. The regenerator according to claim 1, characterized in that, the diameter range of the gadolinium oxysulfide balls in the second filling area is 0.2 mm - 0.5 mm.

4. The regenerator according to claim 1, characterized in that, the diameter range of the gadolinium oxysulfide balls in the third filling area is 0.2 mm - 0.5 mm.

5. A refrigerator, characterized in that, it includes the regenerator according to any one of claims 1 to 4.

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