CN117870221A - Intensified expansion type heat regenerator and special Stirling refrigerator - Google Patents
Intensified expansion type heat regenerator and special Stirling refrigerator Download PDFInfo
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- CN117870221A CN117870221A CN202410151547.5A CN202410151547A CN117870221A CN 117870221 A CN117870221 A CN 117870221A CN 202410151547 A CN202410151547 A CN 202410151547A CN 117870221 A CN117870221 A CN 117870221A
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Abstract
The invention provides an intensified expansion type heat regenerator and a special Stirling refrigerator, wherein the intensified expansion type heat regenerator comprises: a regenerator housing serving as a housing of the intensified expansion regenerator; the reinforced expansion type circulation channels are favorable for circulating and reinforcing alternating oscillation compressed gas which is introduced into the reinforced expansion type circulation channels in the expansion direction, and the reinforced expansion type circulation channels are closely arranged in the regenerator shell in a side-by-side and up-down through mode. The invention also provides a special Stirling refrigerator, which comprises the intensified expansion type heat regenerator and has higher refrigeration efficiency.
Description
Technical Field
The invention relates to the field of regenerators and refrigerators, in particular to an intensified expansion regenerator and a special Stirling refrigerator.
Background
With the development of military, medical and aerospace technologies, stirling refrigerators are rapidly developed, gradually developed from expensive military application scenes to the field of medical equipment with normal price, and play an increasingly important role in various low-temperature requirements of infrared equipment, superconductivity, biological sample preservation and the like.
Stirling refrigerators have various forms, wherein a key component is a heat regenerator, a hot end of the heat regenerator is usually at normal temperature, a cold end of the heat regenerator is in a deep low temperature region, temperature difference of tens to hundreds of degrees along a path is generated in a non-long heat regenerator, and the refrigeration efficiency of the whole refrigerator is seriously affected by a small heat regenerator loss, so that how to further improve the efficiency of the heat regenerator is a key research content of the Stirling refrigerator.
The current regenerator is usually in a packing type and has various different forms, such as stainless steel wire gauze packing, namely stainless steel wire gauze structures stacked layer by layer are adopted for packing, so that the regenerative performance of the regenerator is ensured, and meanwhile, gas with larger porosity still passes through, so that an axial sharp temperature difference along the journey is formed; for example, lead shot filling, namely, lead shots with small volume are piled up, and the lead shot filling can have better thermodynamic performance, however, the lead shot filling is forbidden gradually due to the toxicity of the lead; such as Er 3 Rare metal fillers such as Ni and the like are also prepared into spheres with smaller volumes for stacking and filling, and have better thermodynamic performance at deep low temperature due to higher specific heat capacity, but have the defect of high price; other metal materials are also in the form of stacked pellets, which are prone to sticking after long service time, resulting in reduced performance.
In summary, the current regenerator adopts a silk screen or pellet stacking mode as a filler, ensures higher specific heat capacity and simultaneously has larger porosity for gas to pass through, and can better realize large axial temperature gradient, however, if the efficiency of the refrigerator is further improved, a brand-new regenerator mode is needed to ensure higher regenerative efficiency.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an enhanced expansion regenerator and a special stirling refrigerator.
The present invention provides an enhanced expansion regenerator having the features of: a regenerator housing serving as a housing of the intensified expansion regenerator; and the reinforced expansion type circulating channels are favorable for circulating and reinforcing alternating oscillating compressed gas which is introduced into the reinforced expansion type circulating channels in the expansion direction, and the reinforced expansion type circulating channels are closely arranged in parallel and vertically communicated in the regenerator shell.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: the reinforced expansion type circulation channel comprises a plurality of reinforced expansion type circulation parts, compressed gas alternately oscillated in the reinforced expansion type circulation parts circulates in the expansion direction for reinforcement, circulation in the other direction is blocked, and the reinforced expansion type circulation parts are connected end to end and are communicated into a row to form the reinforced expansion type circulation channel.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: wherein the reinforced expansion type flow-through part comprises: the reinforced expansion type circulation cavity is a drop-shaped cavity with an upward tip and a downward oval end, and a plurality of reinforced expansion type circulation cavities are connected end to end and communicated into a row; and the flow isolation piece is arranged in the reinforced expansion type circulation cavity, so that compressed gas oscillated alternately is favorable for circulating in the reinforced expansion type circulation cavity from bottom to top and prevents the gas from circulating from top to bottom.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: wherein, the baffle includes: the fixed column is of a cylindrical structure which is not penetrated up and down and is arranged in the reinforced expansion type circulation cavity, one end of the fixed column is fixed at the center of the inner top of the reinforced expansion type circulation cavity, and the other end of the fixed column is fixed at the center of the inner bottom of the reinforced expansion type circulation cavity; the flow separation plate is used for enabling alternating oscillating compressed gas to flow from bottom to top, generating backflow resistance for the gas flowing from top to bottom, and comprises an inverted conical surface structure without a circular bottom surface, a cylindrical surface structure which is fixed at the center of the fixed column along the symmetry axis of the conical surface structure and has the same diameter as the conical surface structure and is penetrated from top to bottom, and the cylindrical surface structure is fixed at the top of the conical surface structure and has an upward opening.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: the top tip of the reinforced expansion type circulation cavity and the center of the elliptical end of the bottom of the reinforced expansion type circulation cavity are uniformly provided with a plurality of through holes in a circle, the plurality of through holes at the top of the reinforced expansion type circulation cavity are connected and communicated with the plurality of through holes at the bottom of another reinforced expansion type circulation cavity adjacent to the top of the reinforced expansion type circulation cavity in a one-to-one correspondence manner, and are connected end to end in sequence, so that a plurality of reinforced expansion type circulation parts are communicated into a reinforced expansion type circulation channel.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: the top tip of the reinforced expansion type circulation cavity and the reflux part are uniformly and circularly provided with a plurality of through holes, and the plurality of through holes at the top of the reinforced expansion type circulation cavity are correspondingly connected and communicated with the plurality of through holes at the reflux part at the bottom of the other reinforced expansion type circulation cavity adjacent to the top of the reinforced expansion type circulation cavity one by one and are sequentially connected from head to tail, so that the plurality of reinforced expansion type circulation parts are communicated into a reinforced expansion type circulation channel.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: the reinforced expansion type circulation channel further comprises a plurality of circulation pipes, wherein the plurality of circulation pipes are used for communicating a plurality of through holes at the top of the reinforced expansion type circulation cavity with a plurality of through holes at the bottom of another reinforced expansion type circulation cavity adjacent to the top of the reinforced expansion type circulation cavity, and the plurality of circulation pipes are connected end to end in sequence, so that the plurality of reinforced expansion type circulation parts are communicated into the reinforced expansion type circulation channel.
In the enhanced expansion regenerator provided by the invention, the enhanced expansion regenerator can also have the following characteristics: the heat regenerator shell is of a cylindrical surface structure, holes corresponding to the flow pipes one by one are formed in the upper end and the lower end of the heat regenerator shell, the holes are used for connecting the flow pipes to allow gas to flow in or flow out, the rest parts of the heat regenerator shell except the holes in the upper end and the lower end are all sealed, and the reinforced expansion heat regenerator is made of stainless steel.
The invention also provides a special Stirling refrigerator having the features that it comprises: a linear compressor for pushing the gas to form an alternating oscillating pressure wave; and the Stirling cold head is connected with the linear compressor and comprises a hot end heat exchanger, an intensified expansion type heat regenerator, a cold end heat exchanger and a cold end sealing head, wherein the intensified expansion type heat regenerator is any one of the intensified expansion type heat regenerators.
In the special stirling cooler provided by the invention, the special stirling cooler can also have the following characteristics: the linear compressor is connected with the Stirling cold head to form a compression cavity and an expansion cavity, a plurality of bidirectional air inlets are arranged between the compression cavity and the expansion cavity in a penetrating way, a plurality of cold end air channels are arranged at the contact position of the cold end heat exchanger and the expansion cavity in a penetrating way, the linear compressor pushes air to form alternating oscillating pressure waves to enter the compression cavity, the alternating oscillating pressure waves enter the intensified expansion heat regenerator after radiating through the hot end radiator, alternating oscillating air in the intensified expansion heat regenerator is difficult to flow in a sinusoidal compression period, more expansion air is generated in the expansion period due to easier circulation, the air in the intensified expansion heat regenerator enters the cold end heat exchanger after being expanded, cold energy is led out through the cold end seal head, then the air flows back into the compression cavity through the bidirectional air inlets after flowing into the expansion cavity, compression refrigeration is continued, and direct current components existing in the alternating flow process of the air are led back to the compression cavity through the expansion cavity, so that the air is prevented from accumulating in the expansion cavity.
Effects and effects of the invention
According to an enhanced expansion regenerator and a special Stirling refrigerator, the invention relates to the enhanced expansion regenerator, because the enhanced expansion regenerator comprises: a regenerator housing serving as a housing of the intensified expansion regenerator; the reinforced expansion type circulating channels are favorable for circulating and reinforcing alternating oscillation compressed gas introduced into the reinforced expansion type circulating channels in the expansion direction, and the reinforced expansion type circulating channels are closely arranged in the regenerator shell in parallel and vertically communicated, so that the reinforced expansion type regenerator is favorable for expanding and moving the reciprocating oscillation compressed gas more easily in the expansion direction and blocking the reciprocating oscillation compressed gas in the other direction, and the reciprocating oscillation compressed gas has more components involved in expansion, thereby having higher regenerative efficiency.
Because the special Stirling refrigerator comprises the intensified expansion type heat regenerator, the special Stirling refrigerator has higher refrigeration efficiency.
Drawings
Fig. 1 is a perspective view of an enhanced expansion regenerator in accordance with a first embodiment of the present invention;
fig. 2 is a longitudinal sectional view of an enhanced expansion regenerator in accordance with a first embodiment of the present invention;
FIG. 3 is a longitudinal cross-sectional view of a row of enhanced expansion flow-through channels in accordance with a first embodiment of the present invention;
FIG. 4 is a longitudinal cross-sectional view of a reinforced inflatable flow-through section according to a first embodiment of the present invention;
FIG. 5 is a perspective view of a reinforced expansion-type flow-through chamber with a portion of the reinforced expansion-type flow-through section broken away in accordance with a first embodiment of the present invention;
fig. 6 is a schematic diagram of a special stirling cooler in accordance with a second embodiment of the present invention.
Detailed Description
In order to make the technical means, creation characteristics, achievement purposes and effects achieved by the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings as an enhanced expansion regenerator and a special stirling refrigerator.
Example 1
The present embodiment provides an enhanced expansion regenerator.
Fig. 1 is a perspective view of an enhanced expansion regenerator in accordance with a first embodiment of the present invention.
As shown in fig. 1, the enhanced expansion regenerator 100 is made of stainless steel, and the enhanced expansion regenerator 100 includes a regenerator housing 10 and a plurality of enhanced expansion flow channels 20.
Fig. 2 is a longitudinal sectional view of an enhanced expansion regenerator in accordance with a first embodiment of the present invention.
As shown in fig. 1 to 2, a plurality of the intensified expansion type flow channels 20 are closely arranged side by side and vertically penetrating inside the regenerator housing 10.
FIG. 3 is a longitudinal cross-sectional view of a row of enhanced expansion flow channels in accordance with a first embodiment of the present invention.
As shown in fig. 3, the reinforced expansion type flow passage 20 includes a plurality of reinforced expansion type flow portions 21 and a plurality of flow pipes 22.
FIG. 4 is a longitudinal cross-sectional view of a reinforced inflatable flow-through section according to a first embodiment of the present invention; fig. 5 is a perspective view of a reinforced expansion-type flow-through chamber with a reinforced expansion-type flow-through portion partially broken away in accordance with a first embodiment of the present invention.
As shown in fig. 4 to 5, the reinforced expansion type flow-through section 21 includes a reinforced expansion type flow-through chamber 211 and a flow barrier 212.
The reinforced expansion type circulation cavity 211 is a drop-shaped cavity with an upward tip and a downward oval end, a plurality of through holes are uniformly formed around the tip of the top of the reinforced expansion type circulation cavity 211, and a reflux part 2111 is convexly arranged in the center of the inside of the oval end of the bottom of the reinforced expansion type circulation cavity 211.
The backflow portion 2111 is formed integrally with the reinforced expansion type circulation chamber 211, and a plurality of through holes are uniformly formed in the backflow portion 2111 in a circle.
The baffle 212 includes a fixed post 2121 and a baffle plate 2122.
The fixing post 2121 has a cylindrical structure that is not penetrated up and down, and is disposed inside the reinforced expansion type circulation cavity 211, one end of the fixing post 2121 is fixed at the center of the inner top of the reinforced expansion type circulation cavity 211, and the other end is fixed at the center of the inner portion of the backflow portion 2111, wherein the diameter of the fixing post 2121 is the same as the diameter of the upper bottom surface of the backflow portion 2111.
The baffle 2122 comprises an inverted conical surface structure without a circular bottom surface, a cylindrical surface structure which is fixed at the center of the fixed column 2121 along the symmetry axis and has the same diameter as the conical surface structure and is penetrated up and down, and the cylindrical surface structure is fixed at the top of the conical surface structure and has an upward opening.
As shown in fig. 3 to 5, the plurality of flow pipes 22 connect the plurality of through holes at the top of the reinforced expansion type flow chamber 211 with the plurality of through holes at the return portion 2111 of another reinforced expansion type flow chamber 211 adjacent thereto, and are connected in sequence from the beginning to the end, so that the plurality of reinforced expansion type flow portions 21 are connected to form the reinforced expansion type flow channel 20.
As shown in fig. 1-5, the regenerator housing 10 has a cylindrical surface structure, holes corresponding to the flow tubes 22 are arranged at the upper and lower ends, the holes are used for connecting the flow tubes 22 to allow gas to flow into or out of the reinforced expansion type flow channel 20, and the regenerator housing 10 is sealed and arranged everywhere except for the holes at the upper and lower ends.
< procedure for Using the enhanced expansion regenerator 100 >
When helium gas is selected as the gas working medium and compressed helium gas which is alternately oscillated is introduced into the intensified expansion type heat regenerator 100 from bottom to top, helium gas is firstly introduced from a plurality of holes at the lower end of the heat regenerator shell 10, enters the intensified expansion type circulation cavity 211 through a plurality of through holes on the reflux portion 2111 by the circulation pipe 22, flows into the next intensified expansion type circulation cavity through a plurality of through holes at the top tip of the intensified expansion type circulation cavity 211 and repeats the process until helium gas flows out of the heat regenerator 100, and no component generates reflux resistance to the helium gas in the whole process.
When helium flows from top to bottom, the inverted conical surface structure without the circular bottom surface of the baffle 2122 inside the reinforced expansion type flow cavity 211 can generate reflux resistance for the helium flowing from top to bottom, and prevent the helium from flowing from top to bottom; when helium gas flows to the bottom of the reinforced expansion type circulation chamber 211, a part of helium gas is blocked by the truncated cone-shaped backflow portion 2111 with a narrow upper part and a wide lower part to generate backflow resistance, and the flow from top to bottom is blocked, so that the flow of part of helium gas from top to bottom is inhibited.
< action and Effect of embodiment one >
The combination of the reinforced expansion type circulation cavity 211 and the flow-blocking member 212 in the reinforced expansion type circulation part 21 facilitates the compressed gas of alternating oscillation therein to circulate in the expansion direction in a reinforced expansion manner, the reinforced expansion type circulation channel 20 comprises a plurality of reinforced expansion type circulation parts 21, and the reinforced expansion type heat regenerator 100 is provided with a plurality of reinforced expansion type circulation channels 20, so that the reinforced expansion type heat regenerator 100 facilitates the compressed gas of reciprocating oscillation therein to expand and move more easily in the expansion direction, and the compressed gas of reciprocating oscillation in the other direction is blocked when flowing, thereby enabling the compressed gas of reciprocating oscillation to participate in more expansion amount, and enabling the reinforced expansion type heat regenerator 100 to have better heat recovery efficiency.
< example two >
The present embodiment provides a special stirling cooler.
Fig. 6 is a schematic diagram of a special stirling cooler in accordance with a second embodiment of the present invention.
As shown in fig. 6, the special stirling cooler 200 includes a linear compressor a and a stirling cooler B.
The linear compressor a includes a stator assembly 30 and a mover assembly 40.
The stator assembly 30 is for providing electromagnetic force, and includes a compressor housing 31, a yoke body 32, a stator coil 33, and a fixture 34.
The compressor housing 31 has a cylindrical barrel structure with a circular opening in its top surface.
The yoke body 32 is protrusively disposed around the center of the inner wall of the compressor housing 31.
The stator coil 33 is annularly embedded in the yoke body 32 for providing an alternating magnetic field to generate electromagnetic force, wherein the yoke body 32 restrains the magnetic field of the stator coil 33 to be more uniform and stable.
The fixing device 34 is disposed around the upper and lower portions of the inner wall of the compressor housing 31, and is used for fixing the yoke body 32, and the height of the protruding portion on the inner wall is consistent with the height of the yoke body 32.
The mover assembly 40 includes a first mover 41, a first mover spring 42, a second mover 43, and a second mover spring 44.
The first mover 41 includes a discharge portion 411 and a first mover link 412.
The discharge portion 411 has a disk structure with a hole in the middle, and the discharge portion 411 is sealed by the fixing device 34 and/or the yoke body 32 to be movable up and down.
One end of each of the first mover links 412 is uniformly and vertically fixed to the bottom of the discharge portion 411, and the other end is connected to the compressor housing 31 through the first mover spring 42 at the bottom inside the compressor housing 31.
The second mover 43 includes a linear motion portion 431, a second mover link 432, and a compression portion 433.
The linear motion portion 431 is a permanent magnet with a cylindrical structure, penetrating pipelines which are in one-to-one correspondence with the first rotor connecting rods 412 and used for penetrating the same are arranged from top to bottom in a penetrating manner, the penetrating pipelines are in clearance seal with the first rotor connecting rods 412, the bottom center of the linear motion portion 431 is connected with the compressor housing 31 through a second rotor spring 44 at the inner bottom of the compressor housing 31 and is in clearance seal embedded in a cylindrical cavity formed by the fixing device 34 and the magnetic yoke body 32, and the linear motion portion 431 is driven by an alternating magnetic field of the stator assembly 30 to do reciprocating linear motion in the cylindrical cavity relative to the stator assembly 30, wherein the diameter of the linear motion portion 431 is the same as that of the discharge portion 411.
One end of the second movable connecting rod 432 is vertically fixed on the top surface of the linear motion portion 431, the fixed point is located at the center of the top surface of the linear motion portion 431, and the second movable connecting rod 432 penetrates through the hole of the discharge portion 411 and is sealed with the hole gap.
The compressing part 433 is in a cylindrical structure, the bottom surface of the compressing part 433 is fixedly and vertically connected with the other end of the second movable element connecting rod 432, the fixed point is the center of the bottom surface, the compressing part 433 is driven by the linear moving part 431 to do reciprocating linear movement through the second movable element connecting rod 432, and the compressing part 433 is always positioned outside the compressor shell 31 in the moving process.
Stirling cold head B comprises cold head outer housing 50, cold end head 60, cold head inner housing 70, cold end heat exchanger 80, enhanced expansion regenerator 100, and hot end heat exchanger 90.
The cold head outer shell 50 is of a cylindrical surface structure which penetrates up and down, the inner diameter of the cold head outer shell is the same as that of the circular opening on the top surface of the compressor shell 31, and the bottom of the cold head outer shell 50 is in sealing connection with the circular opening on the top surface of the compressor shell 31.
The cold end seal 60 has a disc structure, and the diameter of the cold end seal 60 is the same as the outer diameter of the cold end outer shell 50, and is hermetically arranged at the top of the cold end outer shell 50.
The inner cold head shell 70 is a cylindrical surface structure penetrating up and down and arranged in the outer cold head shell 50, the outer diameter of the inner cold head shell 70 is smaller than the inner diameter of the outer cold head shell 50, the top of the inner cold head shell 70 is connected to the center of the bottom surface of the cold end seal head 60 in a sealing way so as to be fixed in the Stirling cold head B, the inner diameter of the inner cold head shell 70 is equal to the diameter of the compression part 433, the compression part 433 is sealed in a clearance way and can be embedded in the inner cold head shell 70 in a vertically reciprocating linear mode, and the space surrounded by the discharge part 411, the compression part 433, the second rotor connecting rod 432, the outer cold head shell 50, the cold end seal head 60 and the inner cold head shell 70 together forms an expansion cavity 1.
The cold end heat exchanger 80 is a slit type heat exchanger made of copper, is arranged at the inner top of the cold head inner shell 70 and is connected with the inner side wall of the cold head inner shell 70 and the cold end sealing head 60 for guiding out cold energy, wherein a plurality of cold end gas channels 81 are arranged on the connecting part of the side wall of the cold head inner shell 70 and the cold end heat exchanger 80 in a penetrating way and are used for supplying gas inside the cold end heat exchanger 80 to the expansion cavity 1, the reinforced expansion type heat regenerator 100 made of stainless steel is arranged inside the cold head inner shell 70 and is positioned at the bottom of the cold end heat exchanger 80, the reinforced expansion type heat regenerator 100 is connected with the inner side wall of the cold head inner shell 70, and the upper side of the reinforced expansion type heat regenerator 100 is connected with the bottom of the cold end heat exchanger 80 and is communicated for expanding and backheating gas working media.
The hot-end heat exchanger 90 is a shell-and-tube heat exchanger made of stainless steel, is arranged in the cold-end inner shell 70 and is positioned at the bottom of the intensified expansion type heat regenerator 100, the hot-end heat exchanger 90 is connected with the inner side wall of the cold-end inner shell 70, the hot-end heat exchanger 90 is connected with the lower side of the intensified expansion type heat regenerator 100 and is used for introducing compressed gas, the hot-end heat exchanger 90 is also communicated with two cooling water channels 91 which penetrate through the supercooling-end inner shell 70 and the cold-end outer shell 50 at the same time and are used for introducing and discharging cooling water to cool the compressed high-temperature gas working medium, wherein the space surrounded by the cold-end inner shell 70, the compression part 433 and the hot-end heat exchanger 90 together forms a compression cavity 2, a plurality of bidirectional air inlets 3 are formed in the side wall of the cold-end inner shell 70 at the position of the compression cavity 2 in a penetrating manner and are used for enabling the gas in the expansion cavity 1 to enter the compression cavity 2 to be compressed so as to avoid gas accumulation in the expansion cavity 1, the bottom of the hot-end heat exchanger 90 is communicated with the compression cavity 2, and the gas working medium in the compression cavity 2 can enter the heat exchanger 90 through compression.
< procedure of operation of Special Stirling refrigerator 200 >
The gas working medium is selected as helium, the linear movement part 431 longitudinally reciprocates and linearly moves relative to the stator assembly 30 under the electromagnetic force provided by the alternating magnetic field of the stator coil 33, the compression part 433 is driven by the second rotor connecting rod 432 to reciprocate and linearly move, the compression part 433 compresses helium in the compression cavity 2 in the reciprocating and linear movement, the helium is heated after being compressed and enters the hot end heat exchanger 90, the cooling water channel 91 is communicated with the hot end heat exchanger 90 and is introduced with cooling water to cool the high-temperature compressed helium, the cooled compressed helium flows into the intensified expansion type regenerator 100 and flows upward in an intensified expansion manner into the cold end heat exchanger 80, the cold end heat exchanger 80 guides cold energy through the cold end seal head 60 connected with the top, meanwhile, the helium after heat is guided into the expansion cavity 1 through the cold end gas channel 81 to generate alternating oscillation pressure, the pushing discharge part 411 also longitudinally reciprocates and linearly moves relative to the stator assembly 30, and redundant direct current components generated in the alternating oscillation are pressed into the compression cavity 2 through the bidirectional air inlet hole 3, and the flow is repeated.
< action and Effect of example two >
In the present embodiment, since the special stirling cooler 200 includes the enhanced expansion regenerator 100 with good heat recovery efficiency,
and because of the existence of the intensified expansion type heat regenerator 100, the part of the compressed gas which alternately oscillates expands and flows into the expansion cavity 1 is increased, so that the bidirectional air inlet hole 3 is arranged, and the redundant gas which is partially generated by direct current is guided to flow back into the compression cavity 2, so that the gas in the compression cavity 2 is not less and less, the gas is prevented from accumulating in the expansion cavity 2, and the special refrigerator 200 is ensured to continuously have higher efficiency and refrigerating capacity.
Therefore, the special Stirling refrigerator 200 of the embodiment has a good refrigerating efficiency.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An intensified-expander regenerator, comprising:
a regenerator shell which is used as a shell of the intensified expansion type regenerator; and
the reinforced expansion type circulating channels are beneficial to circulating and reinforcing alternating oscillating compressed gas which is introduced into the reinforced expansion type circulating channels in the expansion direction, and the reinforced expansion type circulating channels are closely arranged in parallel and vertically through in the regenerator shell.
2. The intensified expansion regenerator of claim 1, wherein:
wherein the reinforced expansion type circulation channel comprises a plurality of reinforced expansion type circulation parts,
the compressed gas of alternating oscillation in the reinforced expansion type circulation part circulates and strengthens towards the expansion direction, and the circulation is blocked in the other direction, and a plurality of reinforced expansion type circulation parts are connected end to end and communicated into a row to form the reinforced expansion type circulation channel.
3. The intensified expansion regenerator of claim 2, wherein:
wherein the reinforced expansion type flow-through portion includes:
the reinforced expansion type circulation cavity is a drop-shaped cavity with an upward tip and a downward oval end, and a plurality of reinforced expansion type circulation cavities are connected end to end and communicated into a row; and
the flow isolation piece is arranged in the reinforced expansion type circulation cavity, so that compressed gas oscillated alternately is favorable for circulating in the reinforced expansion type circulation cavity from bottom to top, and the gas is prevented from circulating from top to bottom.
4. The enhanced expansion regenerator of claim 3, wherein:
wherein, the baffle includes:
the fixed column is of a cylindrical structure which is not communicated up and down and is arranged in the reinforced expansion type circulation cavity, one end of the fixed column is fixed at the center of the inner top of the reinforced expansion type circulation cavity, and the other end of the fixed column is fixed at the center of the inner bottom of the reinforced expansion type circulation cavity; and
the flow separation plate is used for enabling alternating oscillating compressed gas to flow from bottom to top, generating backflow resistance for the gas flowing from top to bottom, and comprises an inverted conical surface structure without a circular bottom surface, a cylindrical surface structure which is fixed at the center of the fixed column along the symmetry axis of the conical surface structure and has the same diameter as the conical surface structure and penetrates through the cylindrical surface structure from top to bottom, and the cylindrical surface structure is fixed at the top of the conical surface structure and has an upward opening.
5. The enhanced expansion regenerator of claim 3, wherein:
the top tip of the reinforced expansion type circulation cavity and the center of the elliptical end of the bottom of the reinforced expansion type circulation cavity are uniformly provided with a plurality of through holes in a circle, and the plurality of through holes at the top of the reinforced expansion type circulation cavity are correspondingly connected and communicated with the plurality of through holes at the bottom of the reinforced expansion type circulation cavity adjacent to the top of the reinforced expansion type circulation cavity one by one and are sequentially connected end to end, so that a plurality of reinforced expansion type circulation parts are communicated into the reinforced expansion type circulation channel.
6. The enhanced expansion regenerator of claim 3, wherein:
wherein, the inner center of the bottom elliptic end of the reinforced expansion type circulation cavity is convexly provided with a backflow part which is used for generating backflow resistance for alternating oscillation compressed gas flowing from top to bottom along the inner wall surface of the reinforced expansion type circulation cavity to prevent the compressed gas from flowing from top to bottom,
wherein the reflux part is in a truncated cone shape with a narrow upper part and a wide lower part,
the top tip of the reinforced expansion type circulation cavity and the reflux part are uniformly provided with a plurality of through holes in a circle, and the plurality of through holes at the top of the reinforced expansion type circulation cavity and the plurality of through holes on the reflux part at the bottom of the reinforced expansion type circulation cavity adjacent to the top of the reinforced expansion type circulation cavity are connected and communicated in a one-to-one correspondence and are sequentially connected end to end, so that the reinforced expansion type circulation parts are communicated into the reinforced expansion type circulation channel.
7. The intensified expansion regenerator of claim 5 or 6, wherein:
wherein the reinforced expansion type flow passage also comprises a plurality of flow pipes,
the plurality of the flow pipes are used for communicating the plurality of through holes at the top of the reinforced expansion type flow cavity with the plurality of through holes at the bottom of the reinforced expansion type flow cavity adjacent to the top of the reinforced expansion type flow cavity, and are sequentially connected end to end, so that the plurality of reinforced expansion type flow parts are communicated into the reinforced expansion type flow channel.
8. The intensified expansion regenerator of claim 7, wherein:
wherein the heat regenerator shell is in a cylindrical surface structure, holes corresponding to the flow pipes one by one are arranged at the upper end and the lower end of the heat regenerator shell and are used for connecting the flow pipes to supply gas to flow in or flow out,
except for a plurality of holes at the upper end and the lower end of the heat regenerator shell, all the other parts are arranged in a sealing way,
the reinforced expansion type heat regenerator is made of stainless steel.
9. A special stirling cooler comprising:
a linear compressor for pushing the gas to form an alternating oscillating pressure wave; and
the Stirling cold head is connected with the linear compressor and comprises a hot end heat exchanger, an intensified expansion type heat regenerator, a cold end heat exchanger and a cold end sealing head,
wherein the enhanced expansion regenerator is the enhanced expansion regenerator of any one of claims 1 to 8.
10. The special stirling cooler of claim 9, wherein:
wherein the linear compressor is connected with the Stirling cold head to form a compression cavity and an expansion cavity, a plurality of bidirectional air inlets are arranged between the compression cavity and the expansion cavity in a penetrating way, a plurality of cold end gas channels are arranged at the contact position of the cold end heat exchanger and the expansion cavity in a penetrating way,
the linear compressor pushes gas to form alternating oscillation pressure wave to enter the compression cavity, then enters the intensified expansion type heat regenerator after being radiated by the hot end radiator, the alternating oscillation gas in the intensified expansion type heat regenerator is difficult to flow back in a compression period of sinusoidal movement, and flows more easily in an expansion period to generate more expansion gas,
the gas in the intensified expansion type heat regenerator enters the cold end heat exchanger after being expanded and the cold quantity is led out through the cold end sealing head, then flows into the expansion cavity through the cold end gas channel and returns to the compression cavity through the two-way air inlet hole to continue compression refrigeration,
the bidirectional air inlet hole guides direct current components existing in the alternating flow process of the gas back to the compression cavity through the expansion cavity, so that the accumulation of the gas in the expansion cavity is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410151547.5A CN117870221A (en) | 2024-02-02 | 2024-02-02 | Intensified expansion type heat regenerator and special Stirling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410151547.5A CN117870221A (en) | 2024-02-02 | 2024-02-02 | Intensified expansion type heat regenerator and special Stirling refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117870221A true CN117870221A (en) | 2024-04-12 |
Family
ID=90586728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410151547.5A Pending CN117870221A (en) | 2024-02-02 | 2024-02-02 | Intensified expansion type heat regenerator and special Stirling refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117870221A (en) |
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2024
- 2024-02-02 CN CN202410151547.5A patent/CN117870221A/en active Pending
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