CN218495393U - Stirling refrigerator - Google Patents
Stirling refrigerator Download PDFInfo
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- CN218495393U CN218495393U CN202222370156.1U CN202222370156U CN218495393U CN 218495393 U CN218495393 U CN 218495393U CN 202222370156 U CN202222370156 U CN 202222370156U CN 218495393 U CN218495393 U CN 218495393U
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Abstract
The application relates to the technical field of low-temperature refrigeration, for example to a Stirling refrigerator. The Stirling refrigerator includes: cooling the head; a heat conducting member having a first side connected to the cold head and a second side connected to an object to be cooled; the heat conducting member is capable of conducting heat from the second side to the first side and preventing heat from being conducted from the first side to the second side, the first side and the second side being opposite sides. The Stirling refrigerator can avoid heat leakage from a Stirling cold head, and improve the low-temperature retention time of a cooled object.
Description
Technical Field
The application relates to the technical field of low-temperature refrigeration, for example to a Stirling refrigerator.
Background
The Stirling refrigerator is a mechanical refrigerator driven by electric power, has the advantages of simple structure, reliable operation, long service life, no oil, low noise, difficult abrasion, convenient and adjustable refrigerating capacity and the like, and is widely applied to the field of low-temperature refrigeration. The stirling cryocooler has a cold-end heat exchanger (i.e., a cold head) through which heat is exchanged with an object to be cooled, thereby lowering the temperature of the object to be cooled.
In the related art, the cold head of the stirling cooler is in direct contact with the object to be cooled. The temperature of the cold head is low, the temperature of the cooled object is relatively high, the cold head is in direct contact with the cooled object, and heat is conducted from the cooled object with relatively high temperature to the cold head with relatively low temperature, so that the temperature of the cooled object is reduced.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in order to ensure the effect of heat exchange between the Stirling refrigerator and the cooled object, the cold head of the Stirling refrigerator has higher heat conductivity coefficient and better heat conductivity. However, after the Stirling refrigerator is shut down, heat is extremely easy to leak from the Stirling cold head, and the low-temperature retention time of the cooled object is influenced.
SUMMERY OF THE UTILITY MODEL
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a Stirling refrigerator, which can avoid heat leakage from a Stirling cold head and improve the low-temperature retention time of a cooled object.
In some embodiments, the stirling cooler comprises: cooling the head; a heat conducting member having a first side connected to the cold head and a second side connected to an object to be cooled; the heat conducting member is capable of conducting heat from the second side to the first side and preventing heat from being conducted from the first side to the second side, the first side and the second side being opposite sides.
Optionally, the stirling cooler further comprises: the first heat conduction bonding layer is arranged on the first side of the heat conduction piece and used for enabling the first side of the heat conduction piece to be in heat conduction connection with the cold head; and/or the second heat conduction bonding layer is arranged on the second side of the heat conduction piece and used for enabling the second side of the heat conduction piece to be in heat conduction connection with the cooled object.
Optionally, when the stirling cooler comprises the first heat-conducting adhesive layer, the material of the first heat-conducting adhesive layer comprises heat-conducting silicone grease and/or heat-conducting glue; when the first heat-conducting adhesive layer is made of heat-conducting silicone grease and heat-conducting glue, the first heat-conducting adhesive layer comprises a first heat-conducting glue outer ring layer and a first heat-conducting silicone grease layer, and the first heat-conducting silicone grease layer is filled in the first heat-conducting glue outer ring layer; when the Stirling refrigerator comprises the second heat-conducting bonding layer, the second heat-conducting bonding layer is made of heat-conducting silicone grease and/or heat-conducting glue; when the second heat-conducting bonding layer is made of heat-conducting silicone grease and heat-conducting glue, the second heat-conducting bonding layer comprises a second heat-conducting glue outer ring layer and a second heat-conducting silicone grease layer, and the second heat-conducting silicone grease layer is filled in the second heat-conducting glue outer ring layer.
Optionally, one end of the cold head connected to the heat conducting member is a first connecting end, one end of the heat conducting member connected to the cold head is a second connecting end, and the first connecting end and the second connecting end are identical in shape and size.
Optionally, the stirling cooler further comprises: the heat preservation piece is sleeved on the outer side of the heat conduction piece.
Optionally, the heat conducting member includes: the first side of the lead layer is connected with the cold head; erNi 2 The alloy layer is arranged on one side, away from the cold head, of the lead layer; and, er 3 NiAn alloy layer disposed on the ErNi 2 One side of the alloy layer far away from the lead layer, the Er 3 The other side of the Ni alloy layer is used for connecting with the cooled object.
Optionally, the heat conducting member is shaped as a cylinder, and a height of the cylinder ranges from 16mm to 24mm.
Optionally, the lead layer, the ErNi 2 Alloy layer and said Er 3 The height ratio of the Ni alloy layer is 1.6-2.4.
Optionally, the lead layer, the ErNi 2 Alloy layer and said Er 3 The Ni alloy layers are connected by welding.
Optionally, the stirling cooler further comprises: the shell is provided with a back pressure cavity, a compression cavity and an expansion cavity which are connected in sequence; the compressor is arranged in the back pressure cavity and is used for compressing the gas in the compression cavity; the hot end heat exchanger is sleeved outside the shell and corresponds to the position of the compression cavity; a regenerator, a first end in communication with the compression chamber and a second end in communication with the expansion chamber; the ejector is arranged in the expansion cavity and can reciprocate along the axial direction; the cold end heat exchanger is connected with one end of the expansion cavity far away from the compression cavity; wherein the cold end heat exchanger is the cold end.
The Stirling refrigerator provided by the embodiment of the disclosure can realize the following technical effects:
according to the Stirling refrigerator provided by the embodiment of the disclosure, the first side of the heat conducting piece is connected with the cold head, and the second side of the heat conducting piece is connected with the cooled object. When the temperature of the cold head is lower than the temperature of the object to be cooled, heat is transferred from the object to be cooled to the cold head, and the object to be cooled can be cooled by the cold head. In the case where the temperature of the cold head is higher than the temperature of the object to be cooled, heat tends to be conducted from the cold-end heat exchanger to the object to be cooled, but the heat-conducting member prevents heat from being conducted from the first side to the second side, and therefore heat cannot be conducted from the cold head to the object to be cooled. In this way, when the stirling refrigerator is stopped and the temperature of the cold head is higher than the temperature of the object to be cooled, it is possible to prevent the temperature of the object to be cooled from increasing due to heat leakage from the cold head. Therefore, the Stirling refrigerator provided by the embodiment of the disclosure can avoid heat leakage from the Stirling cold head, and improve the low-temperature retention time of the cooled object.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of the heat conduction of a Stirling cooler provided by embodiments of the present disclosure;
FIG. 2 is a schematic structural view of a heat-conducting member according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a Stirling cooler according to an embodiment of the present disclosure;
fig. 4 is a cross-sectional view of a stirling cooler provided in accordance with an embodiment of the present disclosure.
Reference numerals:
1. a heat conductive member; 11. a lead layer; 12. ErNi 2 An alloy layer; 13. er 3 A Ni alloy layer; 2. a housing; 21. a back pressure chamber; 22. a compression chamber; 23. an expansion chamber; 3. a compressor; 4. a hot end heat exchanger; 5. a heat regenerator; 6. an ejector; 7. a cold side heat exchanger.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the disclosed embodiments can be understood by those of ordinary skill in the art according to specific situations.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
The stirling cooler is an electrically driven mechanical cooler that relies on the expansion of a gas in an expansion chamber to absorb heat for cooling. The Stirling refrigerator has the advantages of simple structure, reliable operation, long service life, no oil, low noise, difficult abrasion, convenient and adjustable refrigerating capacity and the like, and is widely applied to the field of low-temperature refrigeration.
In the related art, the cold head of the stirling cooler is in direct contact with the object to be cooled. The temperature of the cold head is low, the temperature of the cooled object is relatively high, the cold head is in direct contact with the cooled object, and heat is conducted from the cooled object with relatively high temperature to the cold head with relatively low temperature, so that the temperature of the cooled object is reduced.
In order to ensure the effect of heat exchange between the Stirling refrigerator and the cooled object, the cold head of the Stirling refrigerator has higher heat conductivity coefficient and better heat conductivity. However, after the Stirling refrigerator is turned off, heat is easy to leak from the Stirling cold head, and the low-temperature retention time of a cooled object is influenced.
Therefore, the embodiment of the disclosure provides a stirling cryocooler, which can avoid heat leakage from a stirling cold head and improve the low-temperature retention time of a cooled object.
Referring to fig. 1, the stirling cooler comprises a cold head and a heat conducting member 1.
The first side of the heat conducting member 1 is connected to the cold head, and the second side is connected to the object to be cooled. The heat-conducting member 1 is capable of conducting heat from a second side of the heat-conducting member 1 to a first side of the heat-conducting member 1 and preventing heat from being conducted from the first side of the heat-conducting member 1 to the second side of the heat-conducting member 1, the first side and the second side being opposite sides.
According to the Stirling refrigerator provided by the embodiment of the disclosure, the first side of the heat conducting member 1 is connected with the cold head, and the second side of the heat conducting member 1 is connected with the cooled object. When the temperature of the cold head is lower than the temperature of the object to be cooled, heat is transferred from the object to be cooled to the cold head, and the object to be cooled can be cooled by the cold head. In the case where the temperature of the cold head is higher than the temperature of the object to be cooled, heat tends to be conducted from the cold-end heat exchanger to the object to be cooled, but the heat-conductive member 1 prevents heat from being conducted from the first side to the second side, and therefore heat cannot be conducted from the cold head to the object to be cooled. In this way, when the stirling refrigerator is stopped and the temperature of the cold head is higher than the temperature of the object to be cooled, it is possible to prevent the temperature of the object to be cooled from increasing due to heat leakage from the cold head.
Therefore, the Stirling refrigerator provided by the embodiment of the disclosure can avoid heat leakage from the Stirling cold head, and improve the low-temperature retention time of the cooled object.
Optionally, the stirling cooler further comprises a first thermally conductive adhesive layer and/or a second thermally conductive adhesive layer.
The first heat conducting bonding layer is arranged on the first side of the heat conducting piece 1 and used for enabling the first side of the heat conducting piece 1 to be in heat conducting connection with the cold head. The second heat-conducting adhesive layer is disposed on the second side of the heat-conducting member 1, and is used for heat-conducting connection between the second side of the heat-conducting member and the cooled object.
Through setting up first heat conduction adhesive linkage, can avoid leading heat piece 1 to drop from the cold head with leading heat piece 1 and cold head fixed connection, in addition, can not influence the heat-conduction effect between heat piece 1 and the cold head. Through setting up the second heat conduction adhesive linkage, can with heat conduction piece 1 with by cooling object fixed connection, avoid heat conduction piece 1 to drop from by the cooling object, in addition, can not influence heat conduction piece 1 and by the heat-conduction effect between the cooling object.
Optionally, when the stirling cooler includes the first heat-conducting adhesive layer, the material of the first heat-conducting adhesive layer includes heat-conducting silicone grease and/or heat-conducting glue. When the material of the first heat-conducting bonding layer comprises heat-conducting silicone grease and heat-conducting glue, the first heat-conducting bonding layer comprises a first heat-conducting glue outer ring layer and a first heat-conducting silicone grease layer, and the first heat-conducting silicone grease layer is filled in the first heat-conducting glue outer ring layer.
The material of first heat conduction adhesive linkage includes heat conduction silicone grease, can improve the heat conduction effect between the first side of heat-conducting member 1 and the cold head. The material of first heat conduction adhesive linkage includes the heat conduction glue, can guarantee the heat conduction effect between the first side of heat conduction spare 1 and the cold head, can also realize the fixed connection between the first side of heat conduction spare 1 and the cold head. The material of first heat conduction adhesive linkage includes heat conduction silicone grease and heat conduction glue, can improve the heat conduction effect between the first side of heat conduction spare 1 and the cold head, can also realize the fixed connection between the first side of heat conduction spare 1 and the cold head.
It can be understood that the first heat-conducting outer ring layer, the first side of the heat-conducting member 1 and the cold head enclose to define a first accommodating cavity, and the first heat-conducting silicone grease layer is filled in the first accommodating cavity.
When the Stirling refrigerator comprises the second heat-conducting bonding layer, the material of the second heat-conducting bonding layer comprises heat-conducting silicone grease and/or heat-conducting glue. When the second heat-conducting bonding layer is made of heat-conducting silicone grease and heat-conducting glue, the second heat-conducting bonding layer comprises a second heat-conducting glue outer ring layer and a second heat-conducting silicone grease layer, and the second heat-conducting silicone grease layer is filled in the second heat-conducting glue outer ring layer.
The material of the second heat-conducting adhesive layer comprises heat-conducting silicone grease, so that the heat-conducting effect between the second side of the heat-conducting piece 1 and the cooled object can be improved. The material of second heat conduction adhesive linkage includes the heat conduction glue, can guarantee the second side of heat conduction spare 1 and by the heat conduction effect between the cooling object, can also realize the second side of heat conduction spare 1 and by the fixed connection between the cooling object. The material of second heat conduction adhesive linkage includes heat conduction silicone grease and heat conduction glue, can improve the heat conduction effect between the second side of heat conduction spare 1 and the cooled object, can also realize the fixed connection between the second side of heat conduction spare 1 and the cooled object.
It can be understood that the second heat-conducting outer ring layer, the second side of the heat-conducting member 1 and the cooled object enclose to define a second accommodating cavity, and the second heat-conducting silicone grease layer is filled in the second accommodating cavity.
The heat-conducting silicone grease is a heat-conducting silicone grease-like compound prepared by taking organic silicone as a main raw material and adding a material with excellent heat resistance and heat-conducting property. The heat-conducting silicone grease can keep a grease state for a long time at the temperature of-50-230 ℃, and has the advantages of good electrical insulation, good heat conductivity, low freeness, high and low temperature resistance, water resistance, ozone resistance, weather aging resistance and the like. In heat dissipation and conduction applications, even two flat surfaces with very clean surfaces will have voids in contact with each other, and the air in these voids is a poor conductor of heat and hinders the conduction of heat to the heat sink. And heat-conducting silicone grease is filled between the two sections, and the heat-conducting silicone grease in a grease state can fill the gaps, so that heat can be conducted more smoothly and rapidly.
Optionally, one end of the cold head connected to the heat conducting member 1 is a first connecting end, one end of the heat conducting member 1 connected to the cold head is a second connecting end, and the first connecting end and the second connecting end are the same in shape and size.
So set up, first link and second link are in the same place tightly, can increase the heat conduction area between cold head and the heat-conducting member 1, improve hot-conductive effect.
Optionally, the end of the object to be cooled connected to the heat conducting member 1 is a third connecting end, the end of the heat conducting member 1 connected to the object to be cooled is a fourth connecting end, and the third connecting end and the fourth connecting end are the same in shape and size.
So set up, third link and fourth link are tightly laminated together, can increase by the heat conduction area between cooling object and the heat-conducting member 1, improve heat-conducting effect.
Optionally, the stirling cooler further comprises a thermal insulator, which is sleeved outside the heat conducting member 1.
So set up, can improve the heat preservation effect of heat-conducting member 1, avoid cold volume to reveal and cause the unnecessary loss.
Optionally, the material of the heat preservation member is a foaming material. The foaming material has low heat conductivity coefficient, and can avoid cold leakage.
Optionally, the heat preservation member is made of polyurethane rigid foam. The polyurethane rigid foam has an extremely low thermal conductivity (0.022 to 0.033W/(m.K)), and is excellent in heat retaining property and water resistance.
Alternatively, referring to fig. 2, the heat-conducting member 1 includes a lead layer 11, erNi 2 Alloy layer 12 and Er 3 And a Ni alloy layer 13.
The first side of the lead layer 11 is connected to the cold head. ErNi 2 The alloy layer 12 is disposed on the side of the lead layer 11 away from the cold head. Er 3 The Ni alloy layer 13 is disposed on the ErNi 2 The side of the alloy layer 12 away from the lead layer 11, er 3 The other side of the Ni alloy layer 13 is used for connection to an object to be cooled.
From the lead layer 11, erNi 2 Alloy layer 12 and Er 3 The heat conductor 1, which is composed of the Ni alloy layers 13 stacked in this order, has directivity for heat conduction, and heat is easily conducted from the side where the lead layer 11 is located to Er 3 Ni alloy layer 13 side, however, heat is hardly transferred from Er 3 The side of the Ni alloy layer 13 conducts to the side of the lead layer 11. One side of the lead layer 11 is connected with a cold head, er 3 One side of the Ni alloy layer 13 is connected to the object to be cooled. When the temperature of the object to be cooled is higher than the temperature of the cold head, heat is easily conducted from the object to be cooled to the cold head, thereby cooling the object to be cooled. In the case where the temperature of the object to be cooled is lower than the temperature of the cold head, heat is hardly conducted from the cold head to the object to be cooled. In this way, when the temperature of the cold head rises and is higher than the cooled object in the case where the stirling cooler is stopped, it is possible to avoid the temperature of the cooled object from rising due to heat leakage from the cold head. Therefore, the low-temperature retention time of the cooled object can be prolonged, and resource waste can be avoided.
Wherein the lead layer 11 and ErNi 2 Alloy layer 12 and Er 3 The main principle of the heat conductor 1 formed by sequentially stacking the Ni alloy layers 13, which has directionality for heat conduction, is as follows: at different temperatures, the thermal conductivity and specific heat capacity of the three materials are different, and an interface effect exists between the three materials. For example, er 3 The Ni has high heat conductivity coefficient in a low-temperature area and low heat conductivity coefficient in a high-temperature area. By blending different materials, the overall thermal conductivity in a specific temperature range is higher, and the overall thermal conductivity in another temperature range is lower. Thus, the unidirectional heat transfer effect that heat is easily transferred in some temperature intervals and heat is not easily transferred in other temperature intervals is obtained.
It can be understood that the heat conduction member 1 has directivity for heat conduction, and the heat conduction member 1 is a thermal diode.
Alternatively, referring to fig. 1, the heat conduction member 1 is shaped as a cylinder, and the height of the cylinder ranges from 16mm to 24mm. For example, the height of the cylinder may be 16mm, 17mm, 18mm, 20mm, 21mm, 22mm, 23mm, 24mm, and the like.
In this way, heat can be easily conducted from the second side to the first side of the heat conductive member 1, making it difficult for heat to be conducted from the first side to the second side of the heat conductive member 1. In addition, the shape of the heat conducting piece 1 is set to be a cylinder, so that the heat conducting piece 1 is connected with a cold head conveniently, and the heat conducting area is increased.
Optionally, lead layer 11, erNi 2 Alloy layer 12 and said Er 3 The height ratio of the Ni alloy layer 13 is 1 (1.6-2.4) to 0.8-1.2 in sequence. For example, lead layer 11, erNi 2 Alloy layer 12 and Er 3 The height ratio of the Ni alloy layer 13 may be 1.
By applying a lead layer 11, erNi 2 Alloy layer 12 and said Er 3 The height ratio of the Ni alloy layer 13 is limited to the above range, and heat can be easily conducted from the second side to the first side of the heat conductive member 1, and heat can be hardly conducted from the first side to the second side of the heat conductive member 1. Ensuring unidirectional thermal conductivity of the thermally conductive member 1.
Optionally, the lead layer 11 is shaped as a second cylinder, and a height of the second cylinder ranges from 4mm to 6mm. For example, the height of the second cylinder may take on a value of 4mm, 4.2mm, 4.5mm, 5mm, 5.5mm, or 6mm, etc.
By limiting the value of the height of the second cylinder to the above range, heat can be easily conducted from the second side to the first side of the heat conductive member 1, making it difficult for heat to be conducted from the first side to the second side of the heat conductive member 1. Ensuring unidirectional thermal conductivity of the thermally conductive member 1.
Alternatively, erNi 2 The alloy layer 12 is shaped as a third cylinder, and the height of the third cylinder ranges from 8mm to 12mm. For example, the height of the third cylinder may take on a value of 8mm, 9mm, 10mm, 10.5mm, 11mm, 12mm, or the like.
By limiting the height of the third cylinder to the above range, heat can be easily conducted from the second side to the first side of the heat conductive member 1, making it difficult to conduct heat from the first side to the second side of the heat conductive member 1. Ensuring unidirectional thermal conductivity of the thermally conductive member 1.
Alternatively, er 3 The shape of the Ni alloy layer 13 is a fourth cylinder, and the height of the fourth cylinder ranges from 4mm to 6mm. For example, the height of the fourth cylinder may take on a value of 4mm, 4.2mm, 4.5mm, 5mm, 5.5mm, 6mm, or the like.
By limiting the value of the height of the fourth cylinder to the above range, heat can be easily conducted from the second side to the first side of the heat conductive member 1, making it difficult for heat to be conducted from the first side to the second side of the heat conductive member 1. Ensuring unidirectional thermal conductivity of the thermally conductive member 1.
Optionally a lead layer 11, erNi 2 Alloy layer 12 and Er 3 The Ni alloy layer 13 is connected by welding.
The lead layer 11, erNi can be formed by soldering 2 Alloy layer 12 and Er 3 The Ni alloy layers 13 are firmly joined together, achieving unidirectional thermal conductivity of the thermally conductive member 1. In addition, the welding is easy to realize, the operation is flexible, the cost is low, and the cost is saved.
Optionally, in conjunction with fig. 3 and 4, the stirling cooler further comprises a housing 2, a compressor 3, a hot-end heat exchanger 4, a regenerator 5, an ejector 6 and a cold-end heat exchanger 7.
The housing 2 is provided with a back pressure chamber 21, a compression chamber 22 and an expansion chamber 23 connected in this order. The compressor 3 is disposed in the back pressure chamber 21 for compressing the gas in the compression chamber 22. The hot end heat exchanger 4 is sleeved outside the shell 2 and corresponds to the position of the compression cavity 22. A first end of regenerator 5 communicates with compression chamber 22 and a second end of regenerator 5 communicates with expansion chamber 23. The ejector 6 is provided in the expansion chamber 23 so as to be capable of reciprocating relative to the expansion chamber 23. And the cold end heat exchanger 7 is connected with one end of the expansion cavity 23 far away from the compression cavity 22, wherein the cold end heat exchanger 7 is the cold head.
The working process of the Stirling refrigerator is as follows: the stirling refrigerator relies on motor drive's compressor 3 to make the working gas volume that is located initial condition in compression chamber 22 compressed, its temperature has the trend of rising when the gas is compressed, its temperature keeps unchanged after working gas dispels the heat through hot end heat exchanger 4, then, working gas flows through regenerator 5, it is exothermic at regenerator 5's first half section, absorb heat at regenerator 5's latter half section, moreover, working gas gets into expansion chamber 23 through regenerator 5, from cold junction heat exchanger 7 heat absorption volume expansion in expansion chamber 23, so reciprocating cycle, the temperature of cold junction heat exchanger 7 place one end constantly reduces, thereby realize the refrigeration function.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A stirling cooler, comprising:
cooling the head;
a heat conducting member having a first side connected to the cold head and a second side connected to an object to be cooled; the heat conducting member is capable of conducting heat from the second side to the first side and preventing heat from being conducted from the first side to the second side, the first side and the second side being opposite sides.
2. A stirling cooler in accordance with claim 1, further comprising:
the first heat conduction bonding layer is arranged on the first side of the heat conduction piece and used for enabling the first side of the heat conduction piece to be in heat conduction connection with the cold head; and/or the presence of a gas in the gas,
and the second heat conduction bonding layer is arranged on the second side of the heat conduction piece and used for enabling the second side of the heat conduction piece to be in heat conduction connection with the cooled object.
3. A Stirling cooler according to claim 2,
when the Stirling refrigerator comprises the first heat-conducting adhesive layer, the first heat-conducting adhesive layer is made of heat-conducting silicone grease and/or heat-conducting glue; when the first heat-conducting adhesive layer is made of heat-conducting silicone grease and heat-conducting glue, the first heat-conducting adhesive layer comprises a first heat-conducting glue outer ring layer and a first heat-conducting silicone grease layer, and the first heat-conducting silicone grease layer is filled in the first heat-conducting glue outer ring layer;
when the Stirling refrigerator comprises the second heat-conducting bonding layer, the second heat-conducting bonding layer is made of heat-conducting silicone grease and/or heat-conducting glue; when the second heat-conducting adhesive layer is made of heat-conducting silicone grease and heat-conducting glue, the second heat-conducting adhesive layer comprises a second heat-conducting glue outer ring layer and a second heat-conducting silicone grease layer, and the second heat-conducting silicone grease layer is filled in the second heat-conducting glue outer ring layer.
4. A Stirling refrigerator according to claim 3,
the end of the cold head connected with the heat conducting piece is a first connecting end, the end of the heat conducting piece connected with the cold head is a second connecting end, and the first connecting end and the second connecting end are identical in shape and size; and/or the presence of a gas in the gas,
the cooling device comprises a heat conducting piece, a cooled object, a heat conducting piece and a heat conducting piece, wherein one end of the cooled object, which is connected with the heat conducting piece, is a third connecting end, one end of the heat conducting piece, which is connected with the cooled object, is a fourth connecting end, and the third connecting end and the fourth connecting end are identical in shape and size.
5. A Stirling refrigerator according to any one of claims 1 to 4, further comprising:
the heat preservation piece is sleeved on the outer side of the heat conduction piece.
6. A Stirling refrigerator according to any one of claims 1 to 4, wherein the heat conducting member includes:
the first side of the lead layer is connected with the cold head;
ErNi 2 the alloy layer is arranged on one side, away from the cold head, of the lead layer; and (c) and (d),
Er 3 a Ni alloy layer disposed on the ErNi 2 The alloy layer is far away from one side of the lead layer, and the Er 3 The other side of the Ni alloy layer is used for connecting with the cooled object.
7. A Stirling refrigerator according to claim 6,
the heat conducting piece is in a cylinder shape, and the height of the cylinder ranges from 16mm to 24mm.
8. A Stirling cooler according to claim 7,
the lead layer and the ErNi 2 Alloy layer and said Er 3 The height ratio of the Ni alloy layer is 1.6-2.4.
9. A Stirling refrigerator according to claim 7 or 8,
the lead layer and the ErNi 2 Alloy layer and said Er 3 The Ni alloy layers are connected by welding.
10. A stirling cooler in accordance with claim 1, further comprising:
the shell is provided with a back pressure cavity, a compression cavity and an expansion cavity which are connected in sequence;
the compressor is arranged in the back pressure cavity and is used for compressing the gas in the compression cavity;
the hot end heat exchanger is sleeved outside the shell and corresponds to the position of the compression cavity;
a regenerator, a first end of which is communicated with the compression chamber and a second end of which is communicated with the expansion chamber;
the ejector is arranged in the expansion cavity and can reciprocate along the axial direction;
the cold end heat exchanger is connected with one end of the expansion cavity far away from the compression cavity; wherein the cold end heat exchanger is the cold end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222370156.1U CN218495393U (en) | 2022-09-06 | 2022-09-06 | Stirling refrigerator |
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| CN202222370156.1U CN218495393U (en) | 2022-09-06 | 2022-09-06 | Stirling refrigerator |
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| CN218495393U true CN218495393U (en) | 2023-02-17 |
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