A cryogenic refrigerator and a refrigeration method

Abstract

The present invention relates to the field of refrigeration technology, and particularly relates to a cryogenic refrigerator and a refrigeration method. It includes: a housing filled with a working medium therein, the housing is fixedly connected to a bearing seat, the housing is slidably connected with a first moving member and a second moving member, and a heat chamber is arranged on one side of the second moving member away from the bearing seat; a plurality of heat dissipation plates arranged circumferentially, all fixedly connected to one side of the housing close to the heat chamber, and the heat dissipation plates are provided with grooves with spaced steps; a guiding mechanism arranged in the housing for guiding the first moving member; a heat insulation mechanism arranged in the housing. The present invention guides the passing air flow through the grooves, thereby changing the flow state of the air flow, changing the contact state between the air flow and the heat dissipation plate, increasing the contact area between the two, prolonging the heat exchange duration between the two, improving the heat dissipation effect, and further improving the refrigeration effect of the refrigerator.

Description

Technical Field

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

[0002] A refrigerator is a device that transfers heat from a low-temperature region to a high-temperature region by consuming energy (such as electrical energy, mechanical energy, or thermal energy). Its working principle is based on various thermodynamic cycles. Refrigerators are widely used in multiple fields such as air-conditioning systems, food preservation, and industrial cooling. Among them, refrigerators are classified into vapor compression refrigerators, absorption refrigerators, Stirling refrigerators, etc. according to different working (principle) methods. Among them, Stirling refrigerators are widely used due to their characteristics of compact structure, high reliability, and wide application range (high and low temperature environments, etc.).

[0003] The Stirling refrigerator is based on the Stirling cycle and uses the compression and expansion of gas to transfer heat, thereby achieving the purpose of refrigeration. It consists of a hot end and a cold end. Due to the unique refrigeration method of the Stirling refrigerator, there is a certain temperature ratio relationship between the cold end and the hot end. The cold end is the working end and there is "cooling capacity" consumption, while the heat at the hot end continuously accumulates. Therefore, it is necessary to dissipate the heat at the hot end of the Stirling refrigeration. The existing heat dissipation method only uses a heat dissipation plate of a single shape for heat dissipation. For some high-power Stirling refrigerators, such a heat dissipation method is not sufficient for normal heat dissipation, and this situation will lead to local overheating of the refrigerator (the temperature ratio between the hot end and the cold end changes), reducing the working efficiency and even damaging parts. Summary of the Invention

[0004] In order to overcome the disadvantages mentioned in the above background, the present invention provides a cryogenic refrigerator and a refrigeration method.

[0005] The technical solution is as follows: A cryogenic refrigerator includes: a housing filled with a working medium; a carrier seat fixedly connected to the housing; a first moving member and a second moving member slidably connected to the housing, the first moving member being slidably connected to the second moving member; a heat storage filler filled in the second moving member; a heat chamber provided on a side of the second moving member away from the carrier seat; a refrigeration side on a side of the second moving member close to the carrier seat; a plurality of heat dissipation plates arranged circumferentially and fixedly connected to a side of the housing close to the heat chamber, the heat dissipation plates being provided with grooves arranged at intervals, and the groove width of the grooves gradually changing; a driving member installed on a side of the housing away from the carrier seat for driving the first moving member and the second moving member; a guiding mechanism provided in the housing for guiding the first moving member; and a heat insulation mechanism provided in the housing for adjusting the temperature in the heat chamber.

[0006] As a further improvement of the present application, the diameter change trends of adjacent grooves on the same heat dissipation plate are opposite to each other in sequence, and the diameter changes of adjacent grooves on different heat dissipation plates are also opposite to each other, which is used to guide and disrupt the passing air.

[0007] As a further improvement of the present application, the guiding mechanism includes: a guiding member fixedly connected to the inside of the housing, and the housing is fixedly connected with a fixing member; a torsion spring fixedly connected to the fixing member, the torsion spring is fixedly connected with the second moving member, the housing is fixedly connected with a guiding sleeve, and both the guiding member and the guiding sleeve are slidably connected with the first moving member.

[0008] As a further improvement of the present application, the heat preservation mechanism includes: a heat preservation sheet fixedly connected to the housing, and the heat preservation sheet is provided with a plurality of through holes arranged at intervals; a connecting member fixedly connected to the heat preservation sheet, both the heat preservation sheet and the connecting member are made of elastic materials, and the connecting member is in close contact with the housing; a guiding ring fixedly connected to the housing, and the guiding ring is used to support and guide the heat preservation sheet; a limiting component arranged in the housing for deforming the heat preservation sheet; a triggering component arranged in the housing for deforming the connecting member.

[0009] As a further improvement of the present application, the heat preservation sheet is made of elastic rubber and is initially in a compressed state, that is, the heat preservation sheet is deformed and blocks the through holes.

[0010] As a further improvement of the present application, the limiting component includes: a first sliding member slidably connected to the housing, and an elastic element is fixedly connected between the first sliding member and the housing; a limiting frame fixedly connected to the first sliding member, the limiting frame is provided with first limiting grooves arranged in a mirror image, the heat preservation sheet is fixedly connected with limiting protrusions arranged in a mirror image, the first limiting grooves are used to limit adjacent limiting protrusions, and the housing is provided with second limiting grooves arranged in a mirror image on the side close to the limiting protrusions, the second limiting grooves are used to limit adjacent limiting protrusions, and there is an included angle between the first limiting grooves and adjacent second limiting grooves for the limiting protrusions to slide along the second limiting grooves.

[0011] As a further improvement of the present application, the triggering component includes: a pressing plate slidably connected to the housing, the housing is provided with a channel and a cavity, the pressing plate slides in the channel, the channel is filled with a transmission medium, and the cavity is filled with a temperature-sensitive medium; a second sliding member slidably connected to the channel, and the second sliding member is fixedly connected with the first sliding member.

[0012] As a further improvement of the present application, it further includes: a heat conduction rod fixedly connected to the housing, and the heat conduction rod is fixedly connected to the bearing seat; a heat distribution ring fixedly connected to the housing, the heat distribution ring is fixedly connected to the heat conduction rod, and a plurality of circumferentially arranged heat distribution rods are fixedly connected to the heat distribution ring.

[0013] As a further improvement of the present application, the heat distribution rods are located outside the heat preservation sheet and are used to adjust the temperature at the heat cavity.

[0014] A low-temperature refrigeration method, based on the above-mentioned low-temperature refrigerator, includes the following steps:

[0015] Step 1: The driving member drives the first moving member and the second moving member to move, and repeatedly increases and decreases the volume of the working medium in the housing, thereby cooling the refrigeration side of the second moving member. During this process, the heat dissipation plate continuously dissipates the heat generated at the heat cavity, thereby maintaining the thermal balance of the refrigerator.

[0016] Step 2: The first moving member always slides relative to the guiding member and the guiding ring, thereby ensuring the stability of the first moving member and the second moving member during the movement process.

[0017] Step 3: The heat preservation sheet and the connecting member wrap the heat cavity to insulate the heat cavity. When the temperature at the heat cavity is too high, the temperature-sensitive medium in the cavity 1303 gradually expands, and through the extrusion plate, the transmission medium in the channel and the second sliding member, the first sliding member slides relative to the housing, so that the "opening" degree of the through hole matches the temperature at the heat cavity.

[0018] Step 4: The refrigeration side of the second moving member transfers its own "coldness" to the outside of the heat preservation sheet through the heat conduction rod, the heat distribution ring and the heat distribution rods. When the temperature at the heat cavity is too high, the through hole gradually "opens", and the heat at the heat cavity gradually overflows. Subsequently, the heat conduction rod quickly absorbs the heat to quickly correct the temperature difference, thereby improving the refrigeration efficiency and reducing the poor refrigeration effect caused by long-term thermal imbalance. The refrigerator balances the heat and cold by its own refrigeration capacity, thus reducing additional energy consumption.

[0019] In summary, the present invention has the following advantages: The present invention guides the passing air flow through the grooves to change the flow state of the air flow, change the contact state between the air flow and the heat dissipation plate, increase the contact area between the two, extend the heat exchange time between the two, improve the heat dissipation effect, make the refrigerator in a state of thermal balance, and thus improve the refrigeration effect of the refrigerator; Use the "opening and closing" of the heat preservation sheet and the through holes thereon to change the heat dissipation form at the heat cavity, so as to prevent the temperature at the heat cavity from matching the temperature of the refrigeration side of the second moving member, thereby making the refrigerator in a state of thermal imbalance and reducing the refrigeration effect; The heat conduction rod quickly absorbs the heat to quickly correct the temperature difference, thereby improving the refrigeration efficiency and reducing the poor refrigeration effect caused by long-term thermal imbalance. The refrigerator balances the heat and cold by its own refrigeration capacity, thus reducing additional energy consumption. Brief Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the whole of the present invention;

[0021] Figure 2 It is a three-dimensional structure cross-sectional view of the housing, the carrier seat and the driving member of the present invention;

[0022] Figure 3 It is a three-dimensional structure cross-sectional view of the second moving member and the guiding member of the present invention;

[0023] Figure 4 It is a three-dimensional structure cross-sectional view of the second moving member and the heat storage filler of the present invention;

[0024] Figure 5 It is a three-dimensional structure cross-sectional view when the housing and the first moving member of the present invention slide relative to each other;

[0025] Figure 6 It is a three-dimensional structure cross-sectional view when the first moving member and the second moving member of the present invention slide relative to each other;

[0026] Figure 7 It is a three-dimensional structure cross-sectional view of the housing and the second moving member of the present invention;

[0027] Figure 8 It is a three-dimensional structure cross-sectional view of the housing and the guiding member of the present invention;

[0028] Figure 9 It is a three-dimensional structure schematic diagram when the first sliding member moves along with the second sliding member of the present invention;

[0029] Figure 10 It is an exploded three-dimensional structure view of the second moving member and its parts of the present invention.

[0030] Description of the reference numerals in the drawings: 1 - housing, 2 - carrier seat, 3 - first moving member, 4 - second moving member, 5 - heat storage filler, 6 - heat chamber, 7 - heat dissipation plate, 8 - groove, 9 - driving member, 1001 - guiding member, 1002 - fixing member, 1003 - coil spring, 1004 - guiding sleeve, 1101 - heat insulation sheet, 1102 - through hole, 1103 - connecting member, 1104 - guiding ring, 1201 - first sliding member, 1202 - elastic element, 1203 - limiting frame, 1204 - first limiting groove, 1205 - limiting protrusion, 1206 - second limiting groove, 1301 - extrusion plate, 1302 - channel, 1303 - cavity, 1304 - second sliding member, 1401 - heat conducting rod, 1402 - heat dividing ring, 1403 - heat dividing rod. Detailed Description of the Invention

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments do not limit the technical solutions claimed by the present invention to the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0032] A Stirling refrigerator is a thermal machine based on the Stirling cycle. It transfers heat through the compression and expansion of gas, thereby achieving a refrigeration effect. Different from traditional vapor compression refrigerators, a Stirling refrigerator does not require the use of a refrigerant, but uses gas (usually air or helium) as the working medium. The Stirling cycle consists of four main processes: isochoric heating, isobaric expansion, isochoric cooling, and isobaric compression. These four processes alternate in a closed working chamber to form a complete cycle. The Stirling refrigerator transfers heat from the low-temperature end to the high-temperature end through these processes.

[0033] As Figures 1 - 6 shown, in an embodiment of the present invention, a low-temperature refrigerator is proposed to solve the problems that the shape of the heat sink on the existing refrigerator is single, the contact area with the outside air is limited, it is difficult to meet the requirements for dissipating heat from a high-power refrigerator, resulting in local overheating of the refrigerator, reducing the working efficiency, and even damaging parts. It includes: a housing 1 filled with a working medium inside, the housing 1 is fixedly connected with a bearing seat 2, the housing 1 is slidably connected with a first moving member 3 and a second moving member 4, the first moving member 3 is slidably connected with the second moving member 4, the second moving member 4 is filled with a heat storage filler 5, a heat chamber 6 is arranged on the side of the second moving member 4 away from the bearing seat 2, and heat will be generated in the heat chamber 6 during the working process. The side of the second moving member 4 close to the bearing seat 2 is the refrigeration side; a plurality of heat dissipation plates 7 arranged circumferentially, all fixedly connected to the side of the housing 1 close to the heat chamber 6, grooves 8 arranged at intervals are provided on the heat dissipation plates 7, the groove width of the grooves 8 gradually changes, the diameter change trends of adjacent grooves 8 on the same heat dissipation plate 7 are opposite in turn, and the diameter changes of adjacent grooves 8 on different heat dissipation plates 7 are also opposite, for guiding and disturbing the passing air; a driving member 9 installed on the side of the housing 1 away from the bearing seat 2 for driving the first moving member 3 and the second moving member 4; a guiding mechanism arranged inside the housing 1 for guiding the first moving member 3; a heat insulation mechanism arranged inside the housing 1 for regulating the temperature inside the heat chamber 6.

[0034] In the above solution, the Stirling movement is utilized to compress and expand the gas medium at different positions. During the compression and expansion processes, the gas medium absorbs and releases heat to achieve refrigeration. The working medium in the housing 1 is a gas, which includes but is not limited to helium and hydrogen. The heat storage filler 5 is in the form of filaments. The trend of the groove width change of the groove 8 is non-linear, which is used to enhance the degree of disturbance of the flowing air, thereby improving the heat dissipation effect. The driving member 9 adopts electromagnetic drive. Compared with the existing direct drive of the motor, it reduces unnecessary power loss, reduces transmission consumption, and saves energy. The driving of the first moving member 3 and the second moving member 4 by the driving member 9 is an existing technology, and its detailed working principle will not be elaborated here. During operation, the driving member 9 drives the first moving member 3 and the second moving member 4 to move. Both the first moving member 3 and the second moving member 4 slide relative to the housing 1, and the first moving member 3 also slides relative to the second moving member 4, thereby repeatedly increasing and decreasing the volume of the gas medium in the housing 1, so as to cool the refrigeration side of the second moving member 4. During this process, the heat dissipation plate 7 continuously dissipates the heat generated at the heat chamber 6 to maintain the thermal balance of the refrigerator. When the external air flow passes through the heat dissipation plate 7, the air flow flows along the groove 8. During this process, the flow state of the air flow changes under the guidance of the groove 8, thereby changing the contact state between the air flow and the heat dissipation plate 7, increasing the contact area between the two, prolonging the heat exchange time between the two, improving the heat dissipation effect, making the refrigerator in a thermal balance state, and thus improving the refrigeration effect of the refrigerator.

[0035] As Figures 2 - 10 shown, the guiding mechanism includes: a guiding member 1001, fixedly connected inside the housing 1, and the housing 1 is fixedly connected with a fixing member 1002; a coil spring 1003, fixedly connected to the fixing member 1002, and the coil spring 1003 is fixedly connected to the second moving member 4. The housing 1 is fixedly connected with a guiding sleeve 1004. Both the guiding member 1001 and the guiding sleeve 1004 are slidably connected to the first moving member 3. The heat insulation mechanism includes: a heat insulation sheet 1101, fixedly connected to the housing 1, and the heat insulation sheet 1101 is provided with a number of through holes 1102 arranged at intervals; a connecting member 1103, fixedly connected to the heat insulation sheet 1101. Both the heat insulation sheet 1101 and the connecting member 1103 are made of elastic materials. The heat insulation sheet 1101 is made of elastic rubber and is initially in a compressed state, that is, the heat insulation sheet 1101 is deformed and blocks the through holes 1102. The connecting member 1103 is in close contact with the housing 1; a guiding ring 1104, fixedly connected to the housing 1, and the guiding ring 1104 is used to support and guide the heat insulation sheet 1101; a limiting component, arranged in the housing 1, for deforming the heat insulation sheet 1101; a triggering component, arranged in the housing 1, for deforming the connecting member 1103.

[0036] In the above solution, the surface of the heat insulation sheet 1101 is coated with a heat insulation material. A number of through holes 1102 are distributed in a staggered manner. The through holes 1102 are rectangular holes, and the projection length of the through holes 1102 on the "X" axis of the horizontal plane is greater than its projection length on the "Y" axis of the horizontal plane, that is, the longer side of the through hole 1102 is parallel to the axis of the heat insulation sheet 1101. Both the left and right sides of the connecting piece 1103 are made of rubber material, and this rubber material is used to closely contact the housing 1 to ensure sealing. During the movement of the first moving part 3 and the second moving part 4, the first moving part 3 always slides relative to the guiding part 1001 (guiding ring 1104), so as to ensure the stability during the movement of the first moving part 3 and the second moving part 4, reduce the vibration of the refrigerator during operation, and reduce the generation of noise. The first moving part 3 drives the coil spring 1003 to deform repeatedly.

[0037] During the refrigeration process, the heat insulation sheet 1101 and the connecting piece 1103 always wrap the heat chamber 6 to insulate the heat chamber 6 and prevent the overheat of the heat chamber 6 from causing the imbalance between the cold and heat of the refrigerator, resulting in the decline of both the refrigeration effect and the refrigeration efficiency of the refrigerator. The heat insulation sheet 1101 is deformed through the limiting component, and the through hole 1102 is "opened" to dissipate the heat accumulated in the heat chamber 6, avoiding the overheating of the heat chamber 6 from causing the imbalance between the cold and heat of the refrigerator and affecting the normal operation. The triggering component is used to deform the connecting piece 1103 and then dissipate the heat accumulated in the heat chamber 6.

[0038] As Figures 6 - 10 shown, the limiting component includes: a first sliding part 1201, which is slidably connected to the housing 1, and an elastic element 1202 is fixedly connected between the first sliding part 1201 and the housing 1; a limiting frame 1203, which is fixedly connected to the first sliding part 1201. The limiting frame 1203 is provided with mirror-image arranged first limiting grooves 1204. The heat insulation sheet 1101 is fixedly connected with mirror-image arranged limiting protrusions 1205. The first limiting grooves 1204 are used to limit the adjacent limiting protrusions 1205. On one side of the housing 1 close to the limiting protrusions 1205, there are mirror-image arranged second limiting grooves 1206. The second limiting grooves 1206 are used to limit the adjacent limiting protrusions 1205. The limiting protrusions 1205 are initially located at the upper ends of the adjacent first limiting grooves 1204 (second limiting grooves 1206). There is an included angle between the first limiting grooves 1204 and the adjacent second limiting grooves 1206 for the limiting protrusions 1205 to slide along the second limiting grooves 1206.

[0039] In the above solution, the elastic element 1202 is a tension spring used to reset the first sliding member 1201. The mirror-arranged first limiting grooves 1204 are respectively located on the front and rear sides of the limiting frame 1203. Both the first limiting groove 1204 and the adjacent second limiting groove 1206 are circular arcs, and the included angle between the mirror-arranged first limiting grooves 1204 is greater than the included angle between the mirror-arranged second limiting grooves 1206. During the refrigeration process, when the temperature at the hot cavity 6 is too high, the trigger assembly is used to move the first sliding member 1201 downward. The first sliding member 1201 slides relative to the housing 1, the elastic element 1202 is stretched, the first sliding member 1201 drives the limiting frame 1203 to move downward together, the first limiting groove 1204 begins to squeeze the adjacent limiting protrusion 1205, and the limiting protrusion 1205 begins to slide in the adjacent second limiting groove 1206. The mirror-arranged limiting protrusions 1205 begin to move towards each other, and the limiting protrusion 1205 begins to stretch (compress) the heat insulation sheet 1101 (the connecting member 1103). The heat insulation sheet 1101 gradually deforms. During the process, the heat insulation sheet 1101 "slides" along the guiding ring 1104, and the through hole 1102 gradually "opens", so that the heat insulation sheet 1101 loses the wrapping of the hot cavity 6, and the heat at the hot cavity 6 is dissipated through the heat dissipation plate 7, thereby preventing the temperature at the hot cavity 6 from being too high, which may cause the imbalance between the cold and heat of the refrigerator and reduce the refrigeration effect and efficiency.

[0040] As Figure 6 and Figure 9 shown, the trigger assembly includes: a pressing plate 1301, slidably connected to the housing 1. The housing 1 is provided with a channel 1302 and a cavity 1303. The pressing plate 1301 slides in the channel 1302, and the channel 1302 is filled with a transmission medium, and the cavity 1303 is filled with a temperature-sensitive medium; a second sliding member 1304, slidably connected to the channel 1302, and the second sliding member 1304 is fixedly connected to the first sliding member 1201.

[0041] In the above solution, the transmission medium in the channel 1302 is hydraulic oil, and the temperature-sensitive medium in the cavity 1303 is nitrogen. The cavity 1303 is located on the housing 1 near the hot cavity 6. During the refrigeration process, if the temperature at the hot cavity 6 is too high, the heat is transferred to the cavity 1303, and the nitrogen in the cavity 1303 begins to expand due to heat and squeezes the pressing plate 1301. The pressing plate 1301 begins to move leftward and squeezes the hydraulic oil in the channel 1302. The hydraulic oil in the channel 1302 then squeezes the second sliding member 1304, and the second sliding member 1304 begins to move downward. The second sliding member 1304 drives the first sliding member 1201 to move downward together, so that the downward movement of the first sliding member 1201 is determined by the temperature at the hot cavity 6, and further the degree of "opening" of the through hole 1102 matches the temperature at the hot cavity 6, so as to balance the cold and heat of the refrigerator and improve the refrigeration effect.

[0042] AsFigure 3 , Figure 5 , Figure 6 and Figure 10 As shown in Figure 6 and Figure 10 , it further includes: a heat conduction rod 1401, fixedly connected to the housing 1, and the heat conduction rod 1401 is fixedly connected to the bearing seat 2; a heat distribution ring 1402, fixedly connected to the housing 1, the heat distribution ring 1402 is fixedly connected to the heat conduction rod 1401, and a plurality of circumferentially arranged heat distribution rods 1403 are fixedly connected to the heat distribution ring 1402. The heat distribution rods 1403 are located outside the heat preservation sheet 1101 and are used to adjust the temperature at the heat chamber 6.

[0043] In the above solution, during the refrigeration process, the refrigeration side of the second moving member 4 gradually absorbs the heat on the heat conduction rod 1401, that is, the temperature of the heat conduction rod 1401 gradually decreases. The "coldness" is transferred to the outside of the heat preservation sheet 1101 through the heat distribution ring 1402 and the heat distribution rods 1403. When the temperature at the heat chamber 6 is too high, the through hole 1102 gradually "opens", and the heat at the heat chamber 6 gradually overflows. Subsequently, the heat conduction rod 1401 quickly absorbs heat to quickly correct the cold and heat difference, thereby improving the refrigeration efficiency and reducing the poor refrigeration effect caused by long-term cold and heat imbalance. The cold and heat are balanced by the refrigeration capacity of the refrigerator itself, so as to reduce additional energy consumption. After the refrigeration is completed, the power supply can be disconnected.

[0044] As Figures 1 - 10 shown in Figures 1 - 10 , an embodiment of the present invention proposes a low-temperature refrigeration method, based on the above-mentioned low-temperature refrigerator, including the following steps:

[0045] Step 1: The driving member 9 drives the first moving member 3 and the second moving member 4 to move, and makes the volume of the working medium in the housing 1 increase and decrease repeatedly, so as to refrigerate the refrigeration side of the second moving member 4. During the process, the heat dissipation plate 7 continuously dissipates the heat generated at the heat chamber 6 to maintain the cold and heat balance of the refrigerator;

[0046] Step 2: The first moving member 3 always slides relative to the guiding member 1001 and the guiding ring 1104 to ensure the stability of the first moving member 3 and the second moving member 4 during the movement process;

[0047] Step 3: The heat preservation sheet 1101 and the connecting member 1103 wrap the heat chamber 6 to insulate the heat chamber 6. When the temperature at the heat chamber 6 is too high, the temperature-sensitive medium in the cavity 1303 gradually expands, and through the pressing plate 1301, the transmission medium in the channel 1302 and the second sliding member 1304, the first sliding member 1201 slides relative to the housing 1, so that the "opening" degree of the through hole 1102 matches the temperature at the heat chamber 6;

[0048] Step Four: The refrigeration side of the second moving part 4 transfers its own "coldness" to the outside of the heat preservation sheet 1101 through the heat conduction rod 1401, the heat distribution ring 1402, and the heat distribution rod 1403. When the temperature at the heat chamber 6 is too high, the through hole 1102 gradually "opens", and the heat at the heat chamber 6 gradually overflows. Subsequently, the heat conduction rod 1401 is used to quickly absorb heat to quickly correct the cold-heat difference.

[0049] The above has introduced in detail a low-temperature refrigerator and a refrigeration method provided by an embodiment of the present invention. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of the above embodiments should not be construed as a limitation to the present invention.

Claims

1. A low temperature refrigerator, characterized in that: Included are: A shell (1), wherein the shell (1) is filled with a working medium, the shell (1) is fixedly connected to a bearing seat (2), the shell (1) is slidably connected to a first moving member (3) and a second moving member (4), the first moving member (3) is slidably connected to the second moving member (4), the second moving member (4) is filled with a heat storage filler (5), a heat chamber (6) is provided on a side of the second moving member (4) away from the bearing seat (2), and a side of the second moving member (4) close to the bearing seat (2) is a cooling side; A plurality of heat dissipation plates (7) are arranged in a circumferential direction and are all fixedly connected to a side of the housing (1) close to the heat chamber (6); grooves (8) arranged at intervals are provided on the heat dissipation plates (7); and the groove width of the grooves (8) changes gradually; A driving member (9) mounted on a side of the housing (1) away from the bearing seat (2), and used for driving the first moving member (3) and the second moving member (4); A guide mechanism, disposed in the housing (1) and used for guiding the first moving member (3); A heat preservation mechanism, arranged in the shell (1) and used for adjusting the temperature in the heat chamber (6); The heat preservation mechanism comprises: A heat-insulating sheet (1101) fixedly connected to the housing (1), the heat-insulating sheet (1101) being provided with a plurality of through holes (1102) arranged at intervals; A connecting piece (1103) is fixedly connected to the thermal insulation sheet (1101); the thermal insulation sheet (1101) and the connecting piece (1103) are both made of elastic material; and the connecting piece (1103) is in close contact with the shell (1); A guide ring (1104) fixedly connected to the shell (1), the guide ring (1104) being used to support and guide the thermal insulation sheet (1101); A limiting component, arranged on the housing (1) and used to deform the thermal insulation sheet (1101); A trigger component, arranged on the housing (1) and used to deform the connecting member (1103); A heat-conducting rod (1401) is fixedly connected to the housing (1); the heat-conducting rod (1401) is fixedly connected to the bearing seat (2); The heat distribution ring (1402) is fixedly connected to the shell (1), the heat distribution ring (1402) is fixedly connected to the heat conducting rod (1401), and the heat distribution ring (1402) is fixedly connected to a plurality of heat distribution rods (1403) arranged circumferentially.

2. A cryogenic refrigerator according to claim 1, characterized in that: The diameter variation trends of adjacent grooves (8) on the same heat sink (7) are opposite to each other, and the diameter variation trends of adjacent grooves (8) on different heat sinks (7) are also opposite to each other, so as to guide and disturb the passing air.

3. A cryogenic refrigerator according to claim 2, characterized in that: The guiding mechanism comprises: A guide member (1001) is fixedly connected inside the housing (1), and the housing (1) is fixedly connected to a fixing member (1002); A coil spring (1003) is fixedly connected to the fixing member (1002), the coil spring (1003) is fixedly connected to the second movable member (4), the housing (1) is fixedly connected to a guide sleeve (1004), and the guide member (1001) and the guide sleeve (1004) are both slidably connected to the first movable member (3).

4. A low temperature refrigerator according to claim 3, characterized in that: The thermal insulation sheet (1101) is elastic rubber and is initially in a compressed state, that is, the thermal insulation sheet (1101) is deformed and blocks the through hole (1102).

5. A cryogenic refrigerator according to claim 4, characterized in that: The limit assembly includes: A first sliding member (1201) is slidably connected to the housing (1), and an elastic element (1202) is fixedly connected between the first sliding member (1201) and the housing (1); A limiting frame (1203) is fixedly connected to the first sliding member (1201), the limiting frame (1203) is provided with a first limiting groove (1204) arranged in a mirror image, the thermal insulation sheet (1101) is fixedly connected with a limiting protrusion (1205) arranged in a mirror image, the first limiting groove (1204) is used to limit the adjacent limiting protrusion (1205), a side of the shell (1) close to the limiting protrusion (1205) is provided with a second limiting groove (1206) arranged in a mirror image, the second limiting groove (1206) is used to limit the adjacent limiting protrusion (1205), and an angle is formed between the first limiting groove (1204) and the adjacent second limiting groove (1206), so that the limiting protrusion (1205) slides along the second limiting groove (1206).

6. A cryogenic refrigerator according to claim 5, characterized in that: The trigger component includes: An extrusion plate (1301) is slidably connected to the housing (1), the housing (1) is provided with a channel (1302) and a cavity (1303), the extrusion plate (1301) slides in the channel (1302), the channel (1302) is filled with a transmission medium, and the cavity (1303) is filled with a temperature sensing medium; The second sliding member (1304) is slidably connected to the channel (1302), and the second sliding member (1304) is fixedly connected to the first sliding member (1201).

7. A cryogenic refrigerator according to claim 6, characterized in that: The heat distribution rod (1403) is located outside the heat insulation sheet (1101) and is used to adjust the temperature of the heat chamber (6).

8. A low temperature refrigeration method, characterized in that: According to the low temperature refrigerator of claim 7, the specific method of use is as follows: Step 1: The driving member (9) drives the first moving member (3) and the second moving member (4) to move, and causes the volume of the working medium in the housing (1) to repeatedly increase and decrease, thereby cooling the cooling side of the second moving member (4). During the process, the heat sink (7) continuously dissipates the heat generated in the heat chamber (6), thereby maintaining the heat balance of the refrigerator; Step 2: The first moving member (3) always slides relative to the guide member (1001) and the guide ring (1104), thereby ensuring the stability of the first moving member (3) and the second moving member (4) during movement; Step 3: The heat-insulating sheet (1101) and the connecting member (1103) wrap the heat chamber (6) to insulate the heat chamber (6). When the temperature of the heat chamber (6) is too high, the temperature-sensitive medium in the chamber (1303) gradually expands, and through the extrusion plate (1301), the transmission medium in the channel (1302) and the second sliding member (1304), the first sliding member (1201) and the housing (1) slide relative to each other, so that the degree of "opening" of the through hole (1102) matches the temperature of the heat chamber (6); Step 4: The cooling side of the second movable member (4) transfers its own "coldness" to the outside of the thermal insulation plate (1101) through the heat conducting rod (1401), the heat dividing ring (1402) and the heat dividing rod (1403). When the temperature at the heat chamber (6) is too high, the through hole (1102) gradually "opens", and the heat at the heat chamber (6) gradually overflows. The heat is then quickly absorbed by the heat conducting rod (1401), thereby quickly correcting the difference between cold and hot.

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