Throttling assembly and throttling refrigerator

Abstract

The utility model provides a throttle subassembly and throttle refrigerator, including throttle base and throttle cover plate, throttle base forms first runner, said throttle cover plate with said throttle base is connected, said throttle cover plate also forms the throttle orifice, said first runner with said throttle orifice is communicated, said throttle cover plate with said throttle orifice is connected with said throttle base, said throttle base is connected with said throttle cover plate, said throttle base is connected with said throttle cover plate, said throttle base is connected with said throttle cover plate. The throttling cover plate blocks a port of the first flow channel, and the sectional area of the first flow channel is larger than that of the throttling hole. According to the utility model, the throttling holes can be prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the fields of refrigeration and cryogenic engineering and infrared technology, in particular to a throttling component and a throttling refrigerator. Background Art

[0002] Throttling refrigerators are widely used in infrared refrigeration, cryogenic medical treatment, aerospace and other fields due to their compact structure, rapid cooling, small size and light weight. Figure 1 and Figure 2 , Figure 1 is a cross-sectional view of a throttling assembly in the prior art, Figure 2 1 is a top view of a throttling assembly in the prior art, wherein the throttling assembly in the prior art includes an inner cold plate 110 for connecting with an inner cold finger, and a throttling cover plate 120 connected with the inner cold plate 110, wherein the throttling cover plate 120 is formed with a first flow channel 121, a throttling hole 122, and a second flow channel 123 which are connected in sequence, wherein the cross-sectional areas of the first flow channel 121 and the second flow channel 123 are larger than the cross-sectional area of ​​the throttling hole 122. However, the first flow channel 121, the second flow channel 123, and the throttling hole 122 in this throttling assembly are all formed on the throttling cover plate 120, therefore, after the throttling cover plate 120 and the inner cold plate 110 are welded, the minimum cross-sectional area of ​​the hole through which gas can flow is the cross-sectional area of ​​the throttling hole 122. Impurities are easily introduced into the throttling refrigerator components and assembly process. Before the throttling hole 122 is made, the first flow channel 121 and the second flow channel 123 cannot be connected, resulting in impurities that cannot be cleaned up. During the operation of the product, impurities are impacted to the throttling hole 122 with the airflow. When the diameter of the throttling hole 122 is smaller than the diameter of the impurity, blockage is likely to occur, resulting in product failure.

[0003] Therefore, it is necessary to improve the existing throttling assembly and throttling refrigerator to avoid clogging of the throttling hole. Utility Model Content

[0004] The utility model aims to provide a throttling component and a throttling refrigerator to solve the problem that the throttling holes of the existing throttling components and throttling refrigerators are easily blocked.

[0005] In order to solve the above technical problems, the utility model provides a throttling assembly, including a throttling base and a throttling cover plate, the throttling base forms a first flow channel, the throttling cover plate is connected to the throttling base, a throttling hole is also formed on the throttling cover plate, the first flow channel and the throttling hole are connected, the throttling cover plate blocks the port of the first flow channel, and the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the throttling hole.

[0006] Optionally, the throttling cover plate forms a second flow channel, the first flow channel, the throttling hole and the second flow channel are connected in sequence, and the cross-sectional area of ​​the second flow channel is larger than the cross-sectional area of ​​the throttling hole.

[0007] Optionally, a limiting groove is provided on the throttling base, and the throttling cover is limited in the limiting groove.

[0008] Optionally, the first flow channel includes an inlet section and an outlet section which are connected in sequence, and a cross-sectional area of ​​the inlet section is smaller than a cross-sectional area of ​​the outlet section.

[0009] The utility model also provides a throttling refrigerator, comprising a heat exchanger assembly and the above-mentioned throttling assembly connected to the heat exchanger assembly.

[0010] Optionally, it also includes an inner cooling finger and an inner cooling plate, wherein the inner cooling finger is sleeved outside the heat exchanger assembly, the inner cooling plate is arranged on the inner cooling finger, and the throttling base is connected to the inner cooling plate.

[0011] Optionally, it also includes an air intake assembly, and the heat exchanger assembly includes a precooling heat exchange tube, a refrigeration heat exchange tube and a converging throttling tube. The air intake assembly is divided into two paths and is respectively connected to the inlets of the precooling heat exchange tube and the refrigeration heat exchange tube, the outlet of the precooling heat exchange tube is connected to the inlet of the converging throttling tube, and a precooling throttling hole facing the inner cold plate is opened on the converging throttling tube, and the outlet of the refrigeration heat exchange tube is connected to the first flow channel of the throttling base.

[0012] Optionally, an annular protrusion is provided on the throttling base, and an annular groove is provided on the inner cold plate, and the annular groove and the annular protrusion cooperate with each other.

[0013] Optionally, the throttling base and the inner cold plate are connected together by vacuum brazing, and the throttling cover plate and the inner cold plate are connected together by laser welding.

[0014] Optionally, it also includes an air intake assembly, the heat exchanger assembly includes a refrigeration heat exchange tube, the air intake assembly is connected to the inlet of the refrigeration heat exchange tube, and the outlet of the refrigeration heat exchange tube is connected to the first flow channel of the throttling base.

[0015] The utility model provides a throttling component and a throttling refrigerator, which have the following beneficial effects:

[0016] Since the cross-sectional area of ​​the throttling hole is smaller than the cross-sectional area of ​​the first flow channel, throttling cooling can be formed at the throttling hole; since the first flow channel is formed on the throttling base, the throttling cover plate blocks the port of the first flow channel. Therefore, before the throttling cover plate is set on the throttling base, the pipes in the throttling refrigerator can be flushed by the high-pressure gas flowing through the first flow channel to ensure that no impurities larger than the throttling hole remain in the entire gas circuit, so as to avoid failure of the refrigerator due to blockage of the throttling hole, thereby improving reliability and reducing production costs, and then the throttling cover plate is set on the throttling base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of a throttling assembly in the prior art;

[0018] Figure 2 is a top view of a throttling assembly in the prior art;

[0019] Figure 3 is a cross-sectional view of a throttling refrigerator in an embodiment of the utility model;

[0020] Figure 4 It is a cross-sectional view of a throttling component in a throttling refrigerator in an embodiment of the utility model;

[0021] Figure 5 It is a top view of a throttling component in a throttling refrigerator in an embodiment of the utility model.

[0022] Description of the background art reference numerals:

[0023] 110 - inner cold plate; 120 - throttling cover plate; 121 - first flow channel; 122 - throttling hole; 123 - second flow channel.

[0024] Description of the accompanying drawings in the embodiment:

[0025] 200-throttling assembly; 210-internal cold plate; 211-annular groove; 220-throttling base; 221-first flow channel; 222-annular protrusion; 230-throttling cover plate; 231-second flow channel; 232-throttling hole;

[0026] 300-internal cooling finger; 400-air intake assembly; 500-heat exchanger assembly; 510-precooling heat exchange tube; 520-refrigeration heat exchange tube; 530-converging throttling tube; 600-core shaft. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 is a cross-sectional view of a throttling refrigerator in an embodiment of the utility model, Figure 4 is a cross-sectional view of a throttling component 200 in a throttling refrigerator in an embodiment of the utility model, Figure 5 It is a top view of a throttling component 200 in a throttling refrigerator in an embodiment of the utility model. This embodiment provides a throttling component 200, including a throttling base 220 and a throttling cover 230, the throttling base 220 is formed with a first flow channel 221, the throttling cover 230 is connected to the throttling base 220, a throttling hole 232 is also formed on the throttling cover 230, the first flow channel 221 is connected to the throttling hole 232, the throttling cover 230 blocks the port of the first flow channel 221, and the cross-sectional area of ​​the first flow channel 221 is greater than the cross-sectional area of ​​the throttling hole 232.

[0034] Since the cross-sectional area of ​​the throttling hole 232 is smaller than the cross-sectional area of ​​the first flow channel 221, throttling cooling can be formed at the throttling hole 232; since the first flow channel 221 is formed on the throttling base 220, the throttling cover 230 blocks the port of the first flow channel 221. Therefore, before the throttling cover 230 is set on the throttling base 220, the pipes in the throttling refrigerator can be flushed by the high-pressure gas flowing through the first flow channel 221 to ensure that there are no impurities larger than the throttling hole 232 remaining in the entire gas circuit, so as to avoid the failure of the refrigerator due to the blockage of the throttling hole 232, thereby improving reliability and reducing production costs, and then the throttling cover 230 is set on the throttling base 220.

[0035] The throttle cover plate 230 is formed with a second flow channel 231 . The first flow channel 221 , the throttle hole 232 and the second flow channel 231 are connected in sequence. The cross-sectional area of ​​the second flow channel 231 is greater than the cross-sectional area of ​​the throttle hole 232 .

[0036] The throttling base 220 is provided with a limiting groove, and the throttling cover plate 230 cooperates with the limiting groove, so that the throttling cover plate 230 can be easily positioned on the throttling base 220.

[0037] The first flow channel 221 includes an inlet section and an outlet section which are connected in sequence, and the cross-sectional area of ​​the inlet section is smaller than the cross-sectional area of ​​the outlet section, so that impurities can be easily discharged.

[0038] This embodiment also provides a throttling refrigerator, including a heat exchanger assembly, and the above-mentioned throttling assembly 200 connected to the heat exchanger assembly 500.

[0039] In this embodiment, the throttling refrigerator is a two-stage throttling refrigerator, and the throttling component 200 also includes an internal cooling finger 300 and an internal cooling plate 210. The internal cooling finger 300 is sleeved on the outside of the heat exchanger component 500, and the internal cooling plate 210 is arranged on the internal cooling finger 300. The throttling base 220 is connected to the internal cooling plate 210.

[0040] The throttling refrigerator described in this embodiment also includes an air intake component 400, and the heat exchanger component 500 includes a precooling heat exchange tube 510, a refrigeration heat exchange tube 520 and a converging throttling tube 530. The air intake component 400 is connected to the inlets of the precooling heat exchange tube 510 and the refrigeration heat exchange tube 520 in two ways, respectively, the outlet of the precooling heat exchange tube 510 is connected to the inlet of the converging throttling tube 530, and a precooling throttling hole corresponding to the inner cold plate is opened on the converging throttling tube 530, and the outlet of the refrigeration heat exchange tube 520 is connected to the first flow channel 221 of the throttling base 220.

[0041] refer to Figure 4 The throttling base 220 is provided with an annular protrusion 222, and the inner cold plate 210 is provided with an annular groove 211. The annular groove 211 and the annular protrusion 222 cooperate with each other, so that the throttling base 220 can be easily positioned on the inner cold plate 210.

[0042] The annular protrusion 222 is in a circular ring shape, which is more convenient for setting the welding path and improving the welding effect compared to a square shape.

[0043] The throttle base 220 and the inner cold plate 210 are connected together by vacuum brazing, and the throttle cover plate 230 and the inner cold plate 210 are connected together by laser welding.

[0044] The throttling refrigerator further includes a core shaft 600 , on which the precooling heat exchange tube 510 and the cooling heat exchange tube 520 are spirally wound, with the precooling heat exchange tube 510 wound on the inner side and the cooling heat exchange tube 520 wound on the outer side.

[0045] The material of the inner cold plate 210 is titanium alloy, and its purpose is to play an insulating role. The material of the throttling base 220 is red copper, and its thermal conductivity is used to quickly absorb the cold energy after throttling and refrigeration by the converging throttling tube 530 and quickly pre-cool the gas in the throttling base 220.

[0046] The assembly process of the throttling refrigerator is as follows:

[0047] In the first step, the air intake assembly 400 , the heat exchanger assembly 500 and the internal cooling finger 300 are assembled together.

[0048] The second step is to weld the throttle base 220 onto the inner cold plate 210 .

[0049] The third step is to weld the inner cooling plate 210 onto the inner cooling finger 300 .

[0050] The fourth step is to use high-pressure gas to purge the entire gas path of the throttling refrigerator to ensure that impurities in the entire gas path are removed during the high-pressure purge.

[0051] In the fifth step, the throttle cover plate 230 is placed in the limiting groove on the throttle base 220, and the throttle cover plate 230 and the inner cold plate 210 are welded together by laser welding, so that no impurities are introduced into the entire gas path system.

[0052] In other embodiments, the throttling refrigerator may also be a single-stage throttling refrigerator, which also includes an air intake assembly, the heat exchanger assembly 500 includes a refrigeration heat exchange tube 520, the air intake assembly 400 is connected to the inlet of the refrigeration heat exchange tube 520, and the outlet of the refrigeration heat exchange tube 520 is connected to the first flow channel 221 of the throttling base 220.

[0053] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A throttling assembly, characterized in that: It includes a throttling base and a throttling cover plate, the throttling base forms a first flow channel, the throttling cover plate is connected to the throttling base, a throttling hole is also formed on the throttling cover plate, the first flow channel and the throttling hole are connected, the throttling cover plate blocks the port of the first flow channel, and the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the throttling hole.

2. The throttle assembly according to claim 1, characterized in that The throttle cover plate is formed with a second flow channel, the first flow channel, the throttle hole and the second flow channel are connected in sequence, and the cross-sectional area of ​​the second flow channel is larger than the cross-sectional area of ​​the throttle hole.

3. The throttle assembly according to claim 1, characterized in that The throttling base is provided with a limiting groove, and the throttling cover plate is limited in the limiting groove.

4. The throttle assembly according to claim 1, characterized in that The first flow channel includes an inlet section and an outlet section which are connected in sequence, and a cross-sectional area of ​​the inlet section is smaller than a cross-sectional area of ​​the outlet section.

5. A throttling refrigerator, characterized in that: It comprises a heat exchanger assembly, and a throttling assembly as described in any one of claims 1 to 4 connected to the heat exchanger assembly.

6. The throttling refrigerator according to claim 5, characterized in that It also includes an inner cooling finger and an inner cooling plate. The inner cooling finger is sleeved outside the heat exchanger assembly, the inner cooling plate is arranged on the inner cooling finger, and the throttling base is connected to the inner cooling plate.

7. The throttling refrigerator according to claim 6, characterized in that It also includes an air intake component, and the heat exchanger component includes a precooling heat exchange tube, a refrigeration heat exchange tube and a converging throttling tube. The air intake component is divided into two paths and is respectively connected to the inlets of the precooling heat exchange tube and the refrigeration heat exchange tube, the outlet of the precooling heat exchange tube is connected to the inlet of the converging throttling tube, and a precooling throttling hole facing the inner cold plate is opened on the converging throttling tube, and the outlet of the refrigeration heat exchange tube is connected to the first flow channel of the throttling base.

8. The throttling refrigerator according to claim 6, characterized in that An annular protrusion is arranged on the throttling base, and an annular groove is arranged on the inner cold plate, and the annular groove and the annular protrusion are matched.

9. The throttling refrigerator according to claim 6, characterized in that: The throttling base and the inner cold plate are connected together by vacuum brazing, and the throttling cover plate and the inner cold plate are connected together by laser welding.

10. The throttling refrigerator according to claim 5, characterized in that Also includes an air intake assembly, the The heat exchanger assembly includes a refrigeration heat exchange tube, and the air intake assembly is connected to the inlet of the refrigeration heat exchange tube. The outlet of the refrigeration heat exchange tube is connected to the first flow channel of the throttling base.

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