Throttling refrigerator and probe having the same

Abstract

The present application belongs to the field of throttling refrigeration, and particularly relates to a throttling refrigerator and a detector with the same. The throttling refrigerator comprises a disc body, a heat exchange pipe and an expansion cavity, wherein the disc body has a cavity inside; the heat exchange pipe is coiled in a plane in the cavity, and has an air inlet and a throttling hole; and the expansion cavity is connected with the throttling hole and the cavity. On one hand, the cold disc can be rapidly cooled; on the other hand, the cold capacity of the refrigerant can be fully utilized, the loss of the cold capacity of the refrigerant is reduced, and the refrigeration efficiency of the throttling refrigerator is greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of throttling refrigeration, and particularly relates to a throttling refrigerator and a probe with the same. BACKGROUND

[0002] The micro throttling refrigerator mainly utilizes the Joule-Thomson effect (JT) to perform refrigeration, and is widely applied to occasions with small sizes.

[0003] The heat exchange structure of the micro throttling refrigerator is mainly formed by winding heat exchange pipes outside a conical or columnar core shaft. However, the inside of the conical or columnar core shaft is a hollow structure, which causes a waste of a large space, and thus the probe with the throttling refrigerator also has a large space waste, and is difficult to be applied to complex scenes.

[0004] In the related art, various shaped grooves are machined on a plane plate to form a heat exchanger and a throttling device, and thus throttling refrigeration is realized. Such a planarized refrigerator can better meet the needs of various micro and planarized occasions.

[0005] However, in order to ensure the refrigeration characteristics of the throttling refrigerator and avoid the cold loss caused by the metal material with good thermal conductivity, the throttling refrigerator is mainly made of non-metal materials. In order to ensure the machining precision of the micro channel, the non-metal materials such as glass and silicon are generally used.

[0006] Therefore, the throttling refrigerator using the above technology has a limited inlet pressure and low refrigeration efficiency. SUMMARY

[0007] The present application aims to at least partially solve one of the problems in the related art.

[0008] To this end, an embodiment of the present application provides a throttling refrigerator.

[0009] The throttling refrigerator according to the embodiment of the present application has the following characteristics.

[0010] The disc body has a cavity in the inside;

[0011] The heat exchange pipe is flatly coiled in the cavity, and has an inlet and a throttling hole;

[0012] The expansion cavity is connected to the throttling hole and the cavity.

[0013] The refrigeration working medium enters the heat exchange pipe through the gas inlet, and is discharged to the expansion chamber through the throttling hole to generate throttling refrigeration effect. The refrigeration gas in the expansion chamber exchanges heat with the cold plate and other components to be cooled. The refrigeration gas after heat exchange flows back in the chamber of the disc body. The returned refrigeration gas further exchanges heat with the subsequent refrigeration working medium in the heat exchange pipe. The refrigeration working medium after heat exchange in the heat exchange pipe is discharged to the expansion chamber to exchange heat with the components to be cooled. The refrigeration gas after heat exchange further exchanges heat with the subsequent refrigeration working medium in the heat exchange pipe. Thus, the cycle is repeated. On the one hand, the cold plate can be rapidly cooled. On the other hand, the cold capacity of the refrigeration gas can be fully utilized, the loss of the cold capacity of the refrigeration gas is reduced, and the refrigeration efficiency of the throttling refrigerator is greatly improved.

[0014] The throttling refrigerator of the embodiment of the present application is arranged in a flat structure by winding the heat exchange pipe in a planar manner in the chamber of the disc body, thereby reducing the volume of the throttling refrigerator, enriching the application scenarios of the throttling refrigerator, and enabling the throttling refrigerator of the embodiment of the present application to be applied to more extensive scenarios. Compared with the cylindrical or conical structure in the related art, the throttling refrigerator of the embodiment of the present application designed in a flat structure has strong impact resistance and high stability.

[0015] In some embodiments, the heat exchange pipe is a single heat exchange pipe which is wound in a double-layer spiral in the chamber after centering.

[0016] In some embodiments, the disc body includes a first disc body and a second disc body, the first disc body and / or the second disc body is provided with a spiral groove, and the first disc body and the second disc body abut to define a spiral chamber; and the heat exchange pipe is spirally wound in the spiral chamber.

[0017] In some embodiments, the first disc body is provided with an air path channel penetrating through the disc body at a position corresponding to the throttling hole, the air path channel and the spiral chamber are in communication, and the air path channel is provided with a cold plate outside.

[0018] In some embodiments, at least one of the first disc body and the second disc body is made of heat-insulating material or low-thermal-conductivity material.

[0019] In some embodiments, at least one of the first disc body and the second disc body is provided with a vent hole communicating the spiral chamber with the outside.

[0020] In some embodiments, the vent hole is a plurality of vent holes, and the plurality of vent holes are arranged at intervals in the circumferential direction of the first disc body or the second disc body.

[0021] In some embodiments, the throttling refrigerator further comprises a housing, the first disc body and the second disc body are arranged in a receiving cavity of the housing, the housing is provided with a mounting hole corresponding to the gas passage, and the cold disc is arranged at the mounting hole.

[0022] In some embodiments, the throttling refrigerator comprises a first cover and a second cover, the first cover and the second cover are connected to define the receiving cavity, the first disc body is arranged in the first cover, the second disc body is arranged in the second cover, and the mounting hole is arranged on the first cover.

[0023] The throttling refrigerator provided by the embodiments of the present application has the advantages of rich application scenarios, small size, good impact resistance and stability, and high refrigeration efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the throttling refrigerator according to the embodiments of the present application;

[0025] Figure 2 is a structural schematic view of the spiral groove disc of the throttling refrigerator according to the embodiments of the present application;

[0026] Figure 3 is a structural schematic view of the adiabatic disc of the throttling refrigerator according to the embodiments of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1, disc body; 101, first disc body; 102, second disc body; 2, heat exchange pipe; 3, cold disc; 4, spiral groove; 5, spiral chamber; 6, throttling hole; 7, gas passage; 8, expansion cavity; 9, housing; 901, receiving cavity; 902, first cover; 903, second cover; 10, mounting hole; 11, air inlet pipe; 12, air inlet joint; 13, air hole. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] The embodiments of the present application are described below with reference to the accompanying drawings, Figures 1-3 The throttling refrigerator according to the embodiments of the present application,

[0031] The throttling refrigerator of the embodiment of the present application comprises a disc body, a heat exchange pipe and an expansion cavity, wherein the disc body has a cavity inside; the heat exchange pipe is coiled in a planar shape in the cavity, and the heat exchange pipe has an air inlet and a throttling hole; and the expansion cavity is connected with the throttling hole and the cavity.

[0032] The refrigeration working medium enters the heat exchange pipe through the air inlet and is discharged to the expansion cavity through the throttling hole to generate a throttling refrigeration effect. The refrigeration gas in the expansion cavity exchanges heat with the cold disc and other components to be cooled. The refrigeration gas after heat exchange flows back in the cavity of the disc body. The backflow refrigeration gas further exchanges heat with the subsequent refrigeration working medium in the heat exchange pipe. The refrigeration working medium after heat exchange in the heat exchange pipe is discharged to the expansion cavity through the throttling hole to exchange heat with the components to be cooled. The refrigeration gas after heat exchange further exchanges heat with the subsequent refrigeration working medium in the heat exchange pipe in the disc body. Thus, the cycle is repeated. On the one hand, the cold disc can be rapidly cooled. On the other hand, the cold energy of the refrigeration gas can be fully utilized, the loss of the cold energy of the refrigeration gas is reduced, and the refrigeration efficiency of the throttling refrigerator is greatly improved.

[0033] The throttling refrigerator of the embodiment of the present application coils the heat exchange pipe in a planar shape in the cavity of the disc body, thereby being designed in a flattened structure. The volume of the throttling refrigerator is reduced, the application scenarios of the throttling refrigerator are enriched, and the throttling refrigerator of the embodiment of the present application can be applied to more extensive scenarios. Compared with the cylindrical and conical structures in the related art, the throttling refrigerator of the embodiment of the present application designed in a flattened structure has strong impact resistance and high stability.

[0034] It should be noted that the heat exchange pipe is coiled in a planar shape in the cavity, that is, the heat exchange pipe is arranged to extend along a plane. Specifically, the heat exchange pipe can also be provided in multiple layers, but each layer of the heat exchange pipe extends in the same plane. In some embodiments, the heat exchange pipe is spirally coiled in the cavity. In other embodiments, the heat exchange pipe is coiled in a serpentine or curved shape in the cavity.

[0035] The disc body can be an integrated structure with an internal cavity. The disc body can also be composed of multiple sub-disc bodies to define an internal cavity.

[0036] In some embodiments, the disc body comprises a first disc body and a second disc body. The first disc body and / or the second disc body is provided with a spiral groove. The first disc body and the second disc body abut to define a spiral cavity. The heat exchange pipe is spirally coiled in the spiral cavity.

[0037] It can be understood that the spiral groove can be provided on one of the first disc body and the second disc body, or the spiral groove can be provided on both the first disc body and the second disc body.

[0038] In some embodiments, the heat exchange pipe is a single heat exchange pipe which is coiled in a double-layer spiral in the cavity after being centered.

[0039] In some embodiments, the first disc body is provided with an air passage through the disc body at the position corresponding to the throttling orifice. The air passage is connected to the spiral chamber. A cold plate is provided outside the air passage. The air passage and the cold plate define the expansion chamber.

[0040] In some embodiments, at least one of the first and second discs is made of an insulating material or a material with low thermal conductivity.

[0041] In other words, at least one of the first and second discs is made of heat-insulating material or at least one of the first and second discs is made of low thermal conductivity material. That is, the first and second discs can be selected as heat-insulating materials or low thermal conductivity materials as needed.

[0042] In some embodiments, at least one of the first disc and the second disc is provided with a vent hole that connects the spiral chamber to the outside.

[0043] It is understandable that the vent can be provided on only one of the first and second discs, or on both the first and second discs.

[0044] In some embodiments, there are multiple vent holes on the first or second disc body, and the multiple vent holes are spaced apart in the circumferential direction of the first or second disc body.

[0045] In some embodiments, the throttling refrigerator of the present invention further includes a housing, a first plate and a second plate are disposed in the receiving cavity of the housing, the housing is provided with mounting holes corresponding to the gas passage, and the cold plate is disposed at the mounting holes.

[0046] In some embodiments, the housing includes a first cover and a second cover connected to define a receiving cavity, a first disc located inside the first cover, a second disc located inside the second cover, and a mounting hole provided on the first cover.

[0047] The following is in conjunction with the appendix Figures 1-3 A throttling refrigerator according to an embodiment of the present invention is described.

[0048] like Figure 1 As shown, the throttling refrigerator of this embodiment includes a plate body 1, a heat exchange tube 2 and a cold plate 3, wherein the plate body 1 includes a first plate body 101 and a second plate body 102.

[0049] The end surface of the first disc body 101 is provided with a spiral groove 4, the second disc body 102 is in abutment with the end surface of the first disc body 101 provided with the spiral groove 4 to define a spiral cavity 5; the heat exchange pipe 2 is arranged in the spiral cavity 5 along the spiral line of the spiral cavity 5, wherein the second disc body 102 is provided with a vent hole 13 for connecting the spiral cavity 5 with the atmosphere; and the heat exchange pipe 2 is provided with an air inlet and a throttling hole 6; the first disc body 101 is provided with an air path channel 7 penetrating the disc body 1 at a position corresponding to the throttling hole 6, the air path channel 7 is in communication with the spiral cavity 5, and the cold disc 3 is arranged on the outer surface of the disc body 1 at a position corresponding to the air path channel 7 and defines an expansion cavity 8 with the air path channel 7.

[0050] It can be understood that the throttling refrigerator of the embodiment of the present application introduces refrigeration gas into the heat exchange pipe 2 through the air inlet of the heat exchange pipe 2, the refrigeration gas in the heat exchange pipe 2 is sprayed out through the throttling hole 6 of the heat exchange pipe 2, and then enters the expansion cavity 8 defined by the air path channel 7 and the cold disc 3, and the pressure and temperature of the refrigeration gas in the expansion cavity 8 are reduced, on one hand, the refrigeration gas after temperature reduction exchanges heat with the cold disc 3, thereby reducing the temperature of the cold disc 3; on the other hand, the refrigeration gas after temperature reduction flows back to the spiral cavity 5, flows along the spiral line of the spiral cavity 5, and exchanges heat with the heat exchange pipe 2 arranged in the spiral cavity 5, so as to reduce the temperature of the refrigeration gas in the heat exchange pipe 2. The refrigeration gas in the spiral cavity 5 exchanges heat with the cooling gas in the heat exchange pipe 2, and then flows out to the atmosphere through the vent hole 13 of the second disc body 102.

[0051] Therefore, the refrigeration gas in the heat exchange pipe 2 is sprayed out through the throttling hole after temperature reduction of the refrigeration gas in the spiral cavity 5, the temperature of the refrigeration gas is further reduced, the refrigeration gas after further temperature reduction flows back to the spiral cavity 5 and further exchanges heat with the subsequent refrigeration gas in the heat exchange pipe 2, so as to further reduce the temperature of the subsequent refrigeration gas in the heat exchange pipe 2, and the temperature of the cold disc 3 is stabilized at a low temperature through the reciprocating process, thereby being capable of cooling the components that need to be cooled.

[0052] The throttle refrigerator of the embodiment of the present application has the advantages of rich application scenarios and high refrigeration efficiency.

[0053] Therefore, the throttle refrigerator of the embodiment of the present application has the advantages of rich application scenarios and high refrigeration efficiency.

[0054] The throttle refrigerator of the embodiment of the present application will be further described below with reference to the accompanying drawings. Figures 1-3 The throttle refrigerator of the embodiment of the present application will be further described below with reference to the accompanying drawings.

[0055] As shown in the drawings, the throttle refrigerator of the embodiment of the present application comprises a disc body 1, a heat exchange pipe 2 and a cold disc 3. Figure 1 The first disc body 101 has a spiral groove 4 on the end face, and the second disc body 102 is in abutment with the end face of the first disc body 101 provided with the spiral groove 4 to define a spiral cavity 5.

[0056] The heat exchange pipe 2 is arranged in the spiral cavity 5 along the spiral line of the spiral cavity 5, the second disc body 102 is provided with a vent hole 13 for connecting the spiral cavity 5 with the atmosphere, and the heat exchange pipe 2 has an air inlet and a throttling hole 6.

[0057] As shown in the drawings, the vent hole 13 can be an arc-shaped hole, and the number of the vent holes 13 can be multiple. Figure 3 The vent holes 13 are arranged at intervals in the circumferential direction of the second disc body 102.

[0058] It can be understood that the spiral groove 4 can be formed by integral injection molding or integral casting, or machining.

[0059] Optionally, the cross section of the disc body 1 is circular, rectangular, triangular, etc., and the specific shape can be reasonably set according to actual needs.

[0060] It can be understood that the cross section of the disc body 1 is perpendicular to the thickness direction of the disc body 1.

[0061] The first disc body 101 is provided with a gas path channel 7 penetrating the disc body 1 at a position corresponding to the throttle hole, the gas path channel 7 is in communication with the spiral cavity 5, and the cold disc 3 is arranged on the outer side of the disc body 1 at a position corresponding to the gas path channel 7 and defines an expansion cavity 8 with the gas path channel 7.

[0062] It can be understood that the gas path channel 7 and the cold disc 3 define an expansion cavity, and after the refrigerant gas in the heat exchange pipe 2 is throttled and sprayed through the throttle hole 6 of the heat exchange pipe 2, the pressure and temperature in the expansion cavity 8 defined by the gas path channel 7 and the cold disc 3 are reduced, so that the cold quantity of the refrigerant gas can directly act on the cold disc, greatly reducing the loss of the cold quantity of the refrigerant gas and improving the utilization rate of the cold quantity of the refrigerant gas.

[0063] As shown in FIG. Figure 2 In some embodiments, the gas path channel 7 is arranged on the first disc body 101 and located at the center position of the first disc body 101, i.e., at the end point of the spiral groove 4.

[0064] It can be understood that in order to enable the cooling gas throttled and sprayed to pass through the gas path channel 7 and the cold disc 3 for heat exchange as soon as possible, the throttle hole should be arranged at the position of the heat exchange pipe 2 corresponding to the gas path channel 7, i.e., the throttle hole can be arranged at the position of the heat exchange pipe 2 at the end point of the spiral groove 4.

[0065] Optionally, the throttle hole can be made by laser drilling or mechanical drilling.

[0066] In some embodiments, the first disc body 101 is made of a low-thermal-conductivity material such as epoxy and is a spiral groove disc, and the second disc body 102 is made of a heat-insulating material such as foam and is a heat-insulating disc.

[0067] In order to better fix the heat exchange pipe 2 in the spiral groove 4, local glue can be used to fix the heat exchange pipe 2 in the spiral groove disc 101.

[0068] In some embodiments, the throttle support of the embodiment of the present application further comprises a shell 9 having a containing cavity 901, two disc bodies 1 are arranged in the containing cavity 901, the shell 9 has a mounting hole 10, and the cold disc 3 is arranged and mounted at the mounting hole 10.

[0069] Optionally, the shell 9 can be made of metal material, thereby fixing the two disc structures 1, and greatly improving the structural strength of the embodiment of the present application, and thereby enabling the throttling refrigerator to withstand higher inlet gas pressure, and improving the refrigeration efficiency of the throttling refrigerator.

[0070] The shell 9 comprises a first cover 902 and a second cover 903, and the first cover 902 and the second cover 903 define a containing cavity 901.

[0071] Further, the first cover 902 and the second cover 903 can be connected by fasteners to define the containing cavity 901.

[0072] Optionally, the mounting hole 10 is arranged on the first cover 9 corresponding to the gas path channel 7.

[0073] Further, the cold disc 3 can be fixed at the mounting hole 10 by welding.

[0074] In some embodiments, the heat exchange pipe 2 is a finned pipe.

[0075] The throttling refrigerator of the embodiment of the present application sets the heat exchange pipe 2 as a finned pipe, thereby enabling the refrigeration gas in the heat exchange pipe 2 to exchange heat with the refrigeration gas in the spiral cavity 5 more quickly, and further improving the refrigeration efficiency of the throttling refrigerator.

[0076] Optionally, the heat exchange pipe 2 is at least one. Setting multiple heat exchange pipes 2 can further improve the refrigeration efficiency of the throttling refrigerator.

[0077] In some embodiments, the throttling refrigerator of the embodiment of the present application further comprises an inlet pipe 11, and the outlet of the inlet pipe 11 is connected with the inlet of the heat exchange pipe 2 (not shown in the figure).

[0078] By connecting the inlet pipe 11 with the heat exchange pipe 2, the refrigeration gas can be well introduced into the heat exchange pipe 2 through the inlet pipe 11, especially when the number of the heat exchange pipes 2 is multiple.

[0079] Further, in order to facilitate the introduction of the refrigeration gas into the inlet pipe 11, the throttling refrigerator of the embodiment of the present application further comprises an inlet joint 12, and the inlet joint 12 is connected with the inlet of the inlet pipe 11.

[0080] The embodiment of the present application further provides a detector comprising the throttling refrigerator described in the above embodiments. The detector includes but is not limited to an infrared detector.

[0081] The probe of the embodiment of the present application reduces the volume of the probe by setting the throttling refrigerator described in the above embodiment, enriches the application scenarios of the probe, and enables the probe to be applied to more extensive scenarios. Compared with the cylindrical or conical structure in the related art, the probe of the embodiment of the present application has strong impact resistance and high stability.

[0082] On the other hand, the probe of the embodiment of the present application sets the first disc body 101 and the second disc body 102 in abutment, sets the spiral groove 4 on the first disc body 101, and sets the second disc body 102 in abutment with the spiral groove 4. The second disc body 102 and the spiral groove 4 define the spiral chamber 5 in which the heat exchange pipe 2 can be arranged, and the gas passage 7 is set to connect the throttling hole of the heat exchange pipe 2 and the cold disc 3, so that the throttled refrigerator exchanges heat only with the cold disc 3. The backflow of the refrigerator after heat exchange with the cold disc 3 is connected only with the high-pressure gas in the heat exchange pipe 2 in the spiral chamber 5, which can improve the heat exchange efficiency of the refrigeration gas and further improve the refrigeration efficiency. At the same time, at least one of the first disc body 101 and the second disc body 102 is made of heat insulation material, which further reduces the loss of cold energy of the refrigeration gas.

[0083] Therefore, the probe of the present application has rich application scenarios, small volume, good impact resistance and stability, and high refrigeration efficiency.

[0084] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0085] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0086] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", "fixedly connected", "connected", "fixed", and the like should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0088] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0089] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A throttling refrigerator, characterized in that, include: The disc body has internal chambers; A heat exchange tube, which is coiled in a planar shape within the cavity, has an air inlet and a throttling orifice; An expansion cavity, the expansion cavity being connected to the throttling orifice and the chamber; The refrigerant enters the heat exchange tube through the inlet and is discharged into the expansion chamber through the throttling orifice to produce a throttling cooling effect. The refrigerant in the expansion chamber exchanges heat with the components waiting to be cooled on the cold plate. The refrigerant after heat exchange flows back through the chamber of the plate and exchanges heat with the subsequent refrigerant in the heat exchange tube. The refrigerant after heat exchange in the heat exchange tube is discharged into the expansion chamber through the throttling orifice to exchange heat with the components waiting to be cooled. The refrigerant after heat exchange in the plate exchanges heat with the subsequent refrigerant in the heat exchange tube.

2. The throttling refrigerator according to claim 1, characterized in that, The disc body includes a first disc body and a second disc body, and the first disc body and / or the second disc body are provided with spiral grooves. The first disc body and the second disc body abut against each other to define a spiral chamber. The heat exchange tube is spirally wound in the spiral chamber.

3. The throttling refrigerator according to claim 2, characterized in that, The first disc body has an air passage that penetrates through the disc body at the position corresponding to the throttling orifice. The air passage is connected to the spiral chamber. A cold plate is provided on the outside of the air passage. The air passage and the cold plate define the expansion chamber.

4. The throttling refrigerator according to claim 2, characterized in that, At least one of the first and second disc bodies is made of thermal insulation material or low thermal conductivity material.

5. The throttling refrigerator according to claim 2, characterized in that, At least one of the first disc and the second disc is provided with a vent hole that connects the spiral chamber to the outside.

6. The throttling refrigerator according to claim 5, characterized in that, There are multiple vent holes, which are spaced apart in the circumferential direction of the first disc or the second disc.

7. The throttling refrigerator according to claim 3, characterized in that, It also includes a housing, the first plate and the second plate are disposed in the receiving cavity of the housing, the housing is provided with mounting holes corresponding to the air passage, and the cold plate is disposed at the mounting holes.

8. The throttling refrigerator according to claim 7, characterized in that, The housing includes a first cover and a second cover, which are connected to define the receiving cavity. The first disc is located inside the first cover, and the second disc is located inside the second cover. The mounting hole is provided on the first cover.

9. The throttling refrigerator according to claim 1, characterized in that, The heat exchange tube is a single heat exchange tube that is centered and then spirally wound in a double layer within the cavity.

10. A detector, characterized in that, Includes the throttling refrigerator as described in any one of claims 1-7.

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