CN104930742A - Regenerator - Google Patents
Regenerator Download PDFInfo
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- CN104930742A CN104930742A CN201510105237.0A CN201510105237A CN104930742A CN 104930742 A CN104930742 A CN 104930742A CN 201510105237 A CN201510105237 A CN 201510105237A CN 104930742 A CN104930742 A CN 104930742A
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- Prior art keywords
- insertion parts
- regenerator
- storage material
- cool storage
- refrigerant gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention aims to improve efficiency of regenerator in an ultralow temperature refrigerator. In the regenerator of the ultralow temperature refrigerator, the cold regeneration material generates coldness through expansion of freezing medium gas. The container is barrel-shaped and accommodates the cold regeneration material and freezing medium gas flows in the barrel. An insertion part (35) is arranged in the container and is uniform in thickness in the axial direction of the container. The insertion part (35) is provided with an opening part as a flow path for the freezing medium gas at least at the outer periphery and the integral opening rate of the insertion part (35) is greater than that of the insertion part (35)in the center part.
Description
The application advocates the priority of No. 2014-055903rd, the Japanese patent application based on application on March 19th, 2014.The full content of this Japanese publication is by reference to being applied in this description.
Technical field
The present invention relates to a kind of savings to be expanded and the regenerator of cold of generation by the west illiteracy of the higher pressure refrigerant gas supplied from compression set.
Background technology
As the refrigeration machine producing ultralow temperature, there will be a known Ji Fude-McMahon (Gifford-McMahon; GM) refrigeration machine.GM refrigeration machine changes the volume of expansion space by moving back and forth displacer in cylinder body.Correspondingly optionally be connected exhaust end and the suction side of expansion space and compressor with this Volume Changes, make refrigerant gas expand in expansion space thus.Cold of the refrigerant gas produced in expansion space is passed to cooling bench and reaches desired ultralow temperature putting aside while regenerator, thus cools the cooling object (referenced patent document 1) be connected with cooling bench.
Patent document 1: Japanese Unexamined Patent Publication 7-324832 publication
Regenerator uses cool storage material.When refrigerant gas is in the regenerator by being filled with cool storage material and cool storage material carry out heat exchange.At this, the cool storage material be filled in regenerator designs with following prerequisite, and the flow velocity of the refrigerant gas namely flowed in regenerator is impartial, and has nothing to do with the position in regenerator.But, such as owing to being subject to the impact of the flow path resistance of regenerator inwall, when refrigerant gas flows in regenerator, sometimes there is the phenomenon that the flow velocity of the refrigerant gas flowed near the inwall in regenerator is different from the flow velocity of the refrigerant gas that the central part at regenerator flows.Now, the design premises of cool storage material is destroyed, and the efficiency of regenerator can decline.
Summary of the invention
The object of the present invention is to provide a kind of technology of efficiency of the regenerator improved in ultra-low temperature refrigerating device.
In order to solve above-mentioned problem, the regenerator of one embodiment of the present invention possesses: cool storage material, puts aside the cold produced by the expansion of refrigerant gas; Cylindrical container, holds cool storage material and circulation has refrigerant gas; Insertion parts, is contained in container and identical at the thickness axially of container.Insertion parts is at least formed with the opening portion of the stream becoming refrigerant gas at peripheral part, and the aperture opening ratio of insertion parts entirety is greater than the aperture opening ratio of insertion parts at central part.
According to the present invention, the efficiency of the regenerator in ultra-low temperature refrigerating device can be improved.
Accompanying drawing explanation
Fig. 1 is the figure of an example of the regenerative refrigerator schematically represented involved by embodiment.
Fig. 2 is the schematic diagram of the velocity flow profile for illustration of the refrigerant gas flowed in the 2nd regenerator involved by embodiment.
Fig. 3 is the figure of the shape of the insertion parts schematically represented involved by embodiment.
Fig. 4 (a) and Fig. 4 (b) is the figure of the aperture opening ratio for illustration of the insertion parts involved by embodiment.
Fig. 5 (a) and Fig. 5 (b) is the figure of other shapes of the insertion parts schematically represented involved by embodiment.
Fig. 6 is the figure of another shape of the insertion parts schematically represented involved by embodiment.
Fig. 7 (a) and Fig. 7 (b) is the figure of the change for illustration of the aperture opening ratio circumferentially in the peripheral part of the insertion parts involved by embodiment.
Fig. 8 (a) and Fig. 8 (b) is the concept map of the change of the aperture opening ratio of the insertion parts represented involved by embodiment.
In figure: 1-regenerative refrigerator, C1-the 1st gap, 2-the 1st displacer, C2-the 2nd gap, 3-the 2nd displacer, 4-sells, 5-connector, 6-sells, 7-the 1st cylinder body, 8-the 2nd cylinder body, 9-the 1st regenerator, 10, 11-rectifier, 12-Room, 13-the 1st opening, 14-compressor, 15-supply valve, 16-return valve, 17-seal, 18-the 1st expansion space, 19-the 2nd opening, 20-the 1st cooling bench, 21, 22-rectifier, 23-partition member, 24-high temperature side region, 25-low temperature side region, 26-the 2nd expansion space, 27-the 3rd opening, 28-the 2nd cooling bench, 29, 30-cap, 31, 32-pressure pin, 34-the 2nd regenerator, 35-insertion parts, 36-opening portion, 37-center, 38-border circular areas, 39a-part 1 region, 39b-part 2 region.
Detailed description of the invention
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the figure of an example of the regenerative refrigerator 1 schematically represented involved by embodiment.Regenerative refrigerator 1 involved by embodiment is such as use helium as Ji Fude-McMahon (GM) the formula ultra-low temperature refrigerating device of refrigerant gas.As shown in Figure 1, regenerative refrigerator 1 the 2nd displacer 3 that possesses the 1st displacer 2 and link with the 1st displacer 2 along its length.1st displacer 2 and the 2nd displacer 3 such as connect via pin 4, connector 5 and pin 6.
1st cylinder body 7 and the 2nd cylinder body 8 form as one, and have temperature end and low-temperature end respectively.The low-temperature end of the 1st cylinder body 7 is connected in the bottom of the 1st cylinder body 7 with the temperature end of the 2nd cylinder body 8.2nd cylinder body 8 is formed as along the axially extended form identical with the 1st cylinder body 7, is the cartridge that diameter is less than the 1st cylinder body 7.1st cylinder body 7 is the cylindrical container holding the 1st displacer 2 in the mode that can move back and forth along its length.Further, the 2nd cylinder body 8 is the cylindrical container holding the 2nd displacer 3 in the mode that can move back and forth along its length.
Consider intensity, thermal conductivity factor, helium isolating power etc., the 1st cylinder body 7 and the 2nd cylinder body 8 such as use stainless steel.The peripheral part of the 2nd displacer 3 is by metal cylinders such as stainless steels.The outer peripheral face of the 2nd displacer 3 can be formed polyfurolresin uniform wearability resin protection film.
The scotch yoke mechanism (not shown) that the 1st displacer 2 and the 2nd displacer 3 are moved back and forth is provided with in the temperature end of the 1st cylinder body 7.1st displacer 2, the 2nd displacer 3 move back and forth along the 1st cylinder body 7, the 2nd cylinder body 8 respectively.1st displacer 2 and the 2nd displacer 3 possess temperature end and low-temperature end respectively.
1st displacer 2 is for having the container of cylindric outer peripheral face.From viewpoints such as proportion, intensity, thermal conductivity factors, the 1st displacer 2 such as uses folder cloth phenolic resins etc.The 1st cool storage material webbed metal of processing (woven wire) be laminated such as is filled with in the inside of the 1st displacer 2.The internal capacity of the 1st displacer 2 plays a role as the 1st regenerator 9.The top of the 1st regenerator 9 is provided with rectifier 10, the bottom of the 2nd regenerator 9 is provided with rectifier 11.Being formed in the temperature end of the 1st displacer 2 makes refrigerant gas flow to the 1st opening 13 of the 1st displacer 2 from Room 12.
Room 12 is the space formed by the temperature end of the 1st cylinder body 7 and the 1st displacer 2.The volume of Room 12 changes along with the 1st moving back and forth of displacer 2.Be connected with in Room 12 and the exhaust that supplies in the interconnective pipe arrangement of suction and discharge system be made up of compressor 14, supply valve 15 and return valve 16 is shared pipe arrangement.Further, between the part and the 1st cylinder body 7 of the close temperature end of the 1st displacer 2, seal 17 is installed.
The 2nd opening 19 importing refrigerant gas via the 1st clearance C 1 to the 1st expansion space 18 is formed in the low-temperature end of the 1st displacer 2.1st expansion space 18 is the space formed by the 1st cylinder body 7 and the 1st displacer 2.The volume of the 1st expansion space 18 changes along with the 1st moving back and forth of displacer 2.Hot linked 1st cooling bench 20 is configured with not shown cooling object in the position corresponding with the 1st expansion space 18 of the periphery of the 1st cylinder body 7.1st cooling bench 20 is cooled by the refrigerant gas by the 1st clearance C 1.
2nd displacer 3 has cylindric outer peripheral face.The inside of the 2nd displacer 3 is divided into two sections vertically by the rectifier 21 of upper end, the rectifier 22 of lower end and the partition member 23 be positioned at up and down.Ratio partition member 23 in the internal capacity of the 2nd displacer 3 is more by being filled with the 2nd cool storage material be such as made up of nonmagnetic substances such as plumbous or bismuths in the high temperature side region 24 of high temperature side.The cool storage material different from high temperature side region 24 is filled with, such as, by HoCu in the low temperature side region 25 of low temperature (hypomere) side of partition member 23
2deng the 3rd cool storage material that magnetic material is formed.Lead or bismuth, HoCu
2etc. being formed as spherical, multiple spherical formation is assembled and forms cool storage material.Partition member 23 possesses the filter (not shown) that restriction the 2nd cool storage material and the 3rd cool storage material pass through, and mixes with the cool storage material in low temperature side region 25 to prevent the cool storage material in high temperature side region 24.The internal capacity (i.e. high temperature side region 24 and low temperature side region 25) of the 2nd displacer 3 plays a role as the 2nd regenerator 34.1st expansion space 18 is communicated with by the access around connector 5 with the temperature end of the 2nd displacer 3.Refrigerant gas flows to the 2nd regenerator 34 via this access from the 1st expansion space 18.
Be formed for making refrigerant gas flow to the 3rd opening 27 to the 2nd expansion space 26 via the 2nd clearance C 2 in the low-temperature end of the 2nd displacer 3.2nd expansion space 26 is the space formed by the 2nd cylinder body 8 and the 2nd displacer 3.The volume of the 2nd expansion space 26 changes along with the 2nd moving back and forth of displacer 3.2nd clearance C 2 is formed by the low-temperature end of the 2nd cylinder body 8 and the 2nd displacer 3.
Position corresponding with the 2nd expansion space 26 in the periphery of the 2nd cylinder body 8 is configured with and cools hot linked 2nd cooling bench 28 of object.2nd cooling bench 28 is cooled by the refrigerant gas by the 2nd clearance C 2.
1st displacer 2 and the 2nd displacer 3 can possess cap 29 and cap 30 in low-temperature end respectively.Engage from the view point of with displacer main body, cap 29 and cap 30 have the cylinder form of secondary shape.Cap 29 is fixed on the 1st displacer 2 by pressure pin 31, and cap 30 is fixed on the 2nd displacer 3 by pressure pin 32.
2nd regenerator 34 possesses: the 1st insertion parts 35a, adjusts the velocity flow profile of the refrigerant gas of flowing in high temperature side region 24; 2nd insertion parts 35b, adjusts the velocity flow profile of the refrigerant gas of flowing in low temperature side region 25.Below, when not distinguishing the 1st insertion parts 35a and the 2nd insertion parts 35b, be referred to as " insertion parts 35 ".In addition, the detailed content of insertion parts 35 will be carried out aftermentioned.
Then, the action of the regenerative refrigerator 1 involved by embodiment is described.In a certain moment of refrigerant gas supply step, the 1st displacer 2 and the 2nd displacer 3 are positioned at the lower dead center of the 1st cylinder body 7 and the 2nd cylinder body 8.If meanwhile or in the moment of departing from a little open supply valve 15, then high-pressure helium (such as, the helium of 2.2MPa) be supplied in the 1st cylinder body 7 via supply valve 15 from sharing pipe arrangement for exhaust, the 1st opening 13 through the top being arranged in the 1st displacer 2 flows into the 1st regenerator 9 of the 1st displacer 2 inside.Flow into high-pressure helium in the 1st regenerator 9 and be supplied to the 1st expansion space 18 by while the 1st cool storage material cooling via the 2nd opening 19 of bottom and the 1st clearance C 1 that are positioned at the 1st displacer 2.
The high-pressure helium being supplied to the 1st expansion space 18 flows in the 2nd regenerator 34 of the 2nd displacer 3 inside via the access around connector 5.Flow into high-pressure helium in the 2nd regenerator 34 and be supplied to the 2nd expansion space 26 by while the 2nd cool storage material cooling via the 3rd opening 27 of bottom and the 2nd gap that are positioned at the 2nd displacer 3.
So, the 1st expansion space 18 and the 2nd expansion space 26 are full of by high-pressure helium, and supply valve 15 is closed.Now, the 1st displacer 2 and the 2nd displacer 3 are positioned at the top dead centre of the 1st cylinder body 7 and the 2nd cylinder body 8.If meanwhile or in the moment of departing from a little open return valve 16, then the refrigerant gas in the 1st expansion space 18, the 2nd expansion space 26 is depressurized and expands, and becomes low pressure helium (such as, the helium of 0.8MPa).Now, by the expansion of refrigerant gas, produce cold.Absorbed the heat of the 1st cooling bench 20 via the 1st clearance C 1 by the helium that is expanded into the 1st expansion space 18 of low temperature.Further, the helium of the 2nd expansion space 26 absorbs the heat of the 2nd cooling bench 28 via the 2nd clearance C 2.
1st displacer 2 and the 2nd displacer 3 move towards lower dead center, the volume reducing of the 1st expansion space 18 and the 2nd expansion space 26.Helium in 2nd expansion space 26 returns to the 1st expansion space 18 via the 2nd clearance C 2, the 3rd opening 27, the 2nd regenerator 34 and access.And the helium in the 1st expansion space 18 returns to the suction side of compressor 14 via the 2nd opening 19, the 1st regenerator 9 and the 1st opening 13.Now, the 1st cool storage material, the 2nd cool storage material and the 3rd cool storage material cooled dose of gas cooling.That is, the 1st cool storage material, the 2nd cool storage material and the 3rd cool storage material put aside the cold produced by the expansion of refrigerant gas.Using this operation as 1 circulation, regenerative refrigerator 1, by repeatedly carrying out this cool cycles, cools the 1st cooling bench 20 and the 2nd cooling bench 28.
Then, the insertion parts 35 involved by embodiment is described in more detail.
Fig. 2 is the schematic diagram for illustration of the velocity flow profile of the refrigerant gas of flowing in the 2nd regenerator 34 involved by embodiment, is the figure of the velocity flow profile represented when not possessing insertion parts 35.As mentioned above, the 2nd regenerator 34 accommodates the multiple spherical formation as cool storage material.
In Fig. 2, the arrow that symbol 40 and symbol 41 represent is the vector of the flow velocity representing refrigerant gas.Specifically, vector 40a, vector 40b, vector 40c, vector 40d, vector 40e and vector 40f represent the velocity flow profile of the refrigerant gas moved at the temperature end effluent of the 2nd regenerator 34.Further, vector 41a, vector 41b, vector 41c, vector 41d, vector 41e and vector 41f represent the velocity flow profile of the refrigerant gas moved at the low-temperature end effluent of the 2nd regenerator 34.
In Fig. 2, represent that the length of the vector 40a of the vector 40c of flow velocity of central part in the high temperature side of the 2nd regenerator 34, the length of vector 40d and the flow velocity near the inwall of expression the 2nd regenerator 34, vector 40f is equal.This represents in the end of the high temperature side of the 2nd regenerator 34, and the velocity flow profile of refrigerant gas is even, and has nothing to do with the position of the 2nd regenerator 34.
On the other hand, represent that the vector 41c of flow velocity of central part in the low temperature side of the 2nd regenerator 34, the length of vector 41d are longer than the length of the vector 41a of the flow velocity near the inwall of expression the 2nd regenerator 34, vector 41f.This represents in the end of the low temperature side of the 2nd regenerator 34, and the velocity flow profile of refrigerant gas is also unequal.
The cool storage material that 2nd regenerator 34 holds is the metal ball being formed as same radius.Therefore, can say that the flow path resistance that the cool storage material in the 2nd regenerator 34 causes is impartial, and have nothing to do with the position of the 2nd regenerator 34.On the other hand, the flow path resistance of the refrigerant gas that the inwall of the 2nd regenerator 34 causes naturally exists only in the inwall of the 2nd regenerator 34, is not present in the central part of the 2nd regenerator 34.Therefore, the flow path resistance near the inwall of the 2nd regenerator 34 is greater than the flow path resistance of the central part of the 2nd regenerator 34.
Its result, along with refrigerant gas flows to low-temperature end from temperature end in the 2nd regenerator 34, the flow velocity near the inwall of the 2nd regenerator 34 becomes the flow velocity of the central part being less than the 2nd regenerator 34.Therefore, in the end of the low temperature side of the 2nd regenerator 34, the velocity flow profile of refrigerant gas is uneven, becomes and has the hemispherical of protuberance or rotary parabolic planar in low temperature side.
The roughly the same cool storage material of shape is filled with roughly equably in 2nd regenerator 34.Therefore, the heat exchanger effectiveness can saying between refrigerant gas and cool storage material depends on the flow velocity of refrigerant gas.Specifically, the flow velocity of the refrigerant gas flowed in cool storage material is larger, and the heat exchanger effectiveness between refrigerant gas and cool storage material is larger.Therefore, in the low temperature side of the 2nd regenerator 34, the temperature being present in the cool storage material of the central part of the 2nd regenerator 34 is higher than the temperature of the cool storage material near the inwall being present in the 2nd regenerator 34.Its result, the direction of the long axis normal with the 2nd regenerator 34 occurs the thermograde of cool storage material.Thus, heat moves from the cool storage material of the central part being present in the 2nd regenerator 34 towards the cool storage material near the inwall being present in the 2nd regenerator 34, becomes entropy loss.Therefore, if the velocity flow profile of the refrigerant gas of flowing is uneven in the 2nd regenerator 34, then the efficiency of the 2nd regenerator 34 can decline.In addition, when refrigerant gas flows to temperature end from low-temperature end, produce the heat contrary with above-mentioned direction and move.
Based on above-mentioned situation, the 2nd regenerator 34 involved by embodiment possesses the insertion parts 35 of the velocity flow profile equalization of the refrigerant gas for making flowing in the 2nd regenerator 34.
Fig. 3 is the figure of the shape of the insertion parts 35 schematically represented involved by embodiment.Insertion parts 35 is inserted in cylindrical container (i.e. the 2nd regenerator 34).Therefore, insertion parts 35 is formed as discoideus, to be contained in the inwall of the 2nd regenerator 34.Insertion parts 35 is formed as identical at the thickness axially of the 2nd regenerator 34 when being inserted into the 2nd regenerator 34.Insertion parts 35 is also provided with the opening portion 36 becoming refrigerant gas stream, and this opening portion 36 is arranged in when this insertion parts 35 is inserted into the 2nd regenerator 34 and is through to low temperature side from high temperature side.Such as, insertion parts is the plate-shaped member being configured with multiple opening.In Fig. 3, in order to avoid numerous and diverse, only symbol is marked to an opening portion 36.But the shape represented with blank in Fig. 3 is opening portion 36.Also identical in Fig. 4 and Fig. 5 described later.
In Fig. 3, the center 37 that the black round dot represented with symbol 37 is insertion parts 35.As shown in Figure 3, the central part region that insertion parts 35 is comprising center 37 is not provided with opening portion 36, is at least provided with an opening portion 36 at the peripheral part of insertion parts 35.
At this, " peripheral part " of insertion parts 35 refers to by the circular region of 2 the concentric circles encirclements being common center with the center 37 of insertion parts 35.In the circular region of peripheral part forming insertion parts 35, the circle in outside can be consistent with the periphery of insertion parts 35.Further, " inner peripheral portion " of insertion parts 35 refers to the region that the circle of the inner side be configured in the circular region of peripheral part surrounds.Can say that the inner peripheral portion of insertion parts 35 is central part regions of the insertion parts 35 at the center 37 comprising insertion parts 35.
Fig. 4 (a) and Fig. 4 (b) is the figure of the aperture opening ratio for illustration of the insertion parts 35 involved by embodiment.More specifically, Fig. 4 (a) is the figure of the integral finish rate for illustration of the insertion parts 35 shown in Fig. 3, Fig. 4 (b) is the figure be described the aperture opening ratio of the central part of the insertion parts 35 shown in Fig. 3.
As shown in Fig. 4 (a), the integral finish rate of insertion parts 35 is the percentage of area summation Sb relative to the total surface area Sa of the upper surface part of insertion parts 35 of the opening portion 36 in the upper surface part of insertion parts 35.In Fig. 4 (a), the subject area during integral finish rate that the region represented with oblique line is calculating insertion parts 35.
On the other hand, the aperture opening ratio of the central part of insertion parts 35 is the aperture opening ratio in border circular areas 38 centered by the center 37 of insertion parts 35.That is, the aperture opening ratio of the central part of insertion parts 35 is the percentage of area summation Sd relative to the area Sc of border circular areas 38 of opening portion 36 in border circular areas 38.In Fig. 4 (b), the region represented with oblique line is border circular areas 38.Therefore, in Fig. 4 (a), border circular areas 38 is consistent with the whole upper surface part of insertion parts 35.In addition, the border circular areas 38 shown in Fig. 4 (b) is an example of the inner peripheral portion of above-mentioned insertion parts 35.
As shown in Fig. 3 and Fig. 4 (a), Fig. 4 (b), the density of the opening portion 36 that insertion parts 35 is formed as in peripheral part is greater than the density of the opening portion 36 in central part.Therefore, in insertion parts 35, the integral finish rate of insertion parts 35 is greater than the aperture opening ratio of insertion parts 35 at central part.That is, in insertion parts 35, compared with central part, peripheral part is provided with more opening portion 36, refrigerant gas more easily flows.Thus, if insertion parts 35 is inserted in the 2nd regenerator 34, then compared with central part, less at the flow path resistance of the refrigerant gas of the inwall side of the 2nd regenerator 34.Its result, in the 2nd regenerator 34, the velocity flow profile of the refrigerant gas of flowing is close to impartial.
Fig. 3 and Fig. 4 (a), Fig. 4 (b) represent to possess multiple opening portion 36 and the identical insertion parts 35 of their shape.The shape of the opening portion 36 that insertion parts 35 possesses can not be identical, and size or shape can not be identical.
Fig. 5 (a) and Fig. 5 (b) is the figure of other shapes of the insertion parts 35 schematically represented involved by embodiment.Specifically, Fig. 5 (a) and Fig. 5 (b) represents to possess the identical but figure of the insertion parts 35 of the opening portion 36 varied in size of shape.
In insertion parts 35 shown in Fig. 5, near center 37, be not provided with opening portion 36.Further, in the insertion parts 35 shown in Fig. 5, the size being arranged at the opening portion 36a of peripheral part is larger than the opening portion 36b be arranged at inside it.At this, Fig. 5 (a) represents whole insertion parts 35.Further, Fig. 5 (b) represents the central part of insertion parts 35.Insertion parts 35 shown in Fig. 5 (a) and Fig. 5 (b) is also identical with the insertion parts 35 shown in Fig. 3, and the integral finish rate of insertion parts 35 is greater than the aperture opening ratio of insertion parts 35 at central part.
Fig. 6 is the figure of another shape of the insertion parts 35 schematically represented involved by embodiment.Specifically, Fig. 6 is the figure representing the insertion parts 35 possessing size and all not identical opening portion 36 of shape.
In insertion parts 35 shown in Fig. 6, near center 37, be not provided with opening portion 36 equally.Further, in the insertion parts 35 shown in Fig. 6, the size being arranged at the opening portion 36a of peripheral part is larger than the opening portion 36b being arranged at inner side.Insertion parts 35 shown in Fig. 6 is also identical with the insertion parts 35 shown in Fig. 3 and Fig. 4 (a), Fig. 4 (b), and the integral finish rate of insertion parts 35 is greater than the aperture opening ratio of insertion parts 35 at central part.
As mentioned above, the aperture opening ratio that the insertion parts 35 involved by embodiment is configured to peripheral part is larger than the aperture opening ratio of central part.Therefore, the flow path resistance of the central part of insertion parts 35 is greater than the flow path resistance of peripheral part, is greater than by the refrigerant gas of insertion parts 35 degree reduced at the flow velocity of peripheral part in the degree that the flow velocity of central part reduces.Thus, by inserting insertion parts 35, the flow velocity of the refrigerant gas of flowing in the 2nd regenerator 34 can be made close to impartial, and have nothing to do with the position of the 2nd regenerator 34 inside.
At this, impartial from the flow velocity of the refrigerant gas making flowing the 2nd regenerator 34, and the viewpoint irrelevant with the position of the 2nd regenerator 34 inside, the aperture opening ratio of preferred insertion parts 35 is constant in the circumference of insertion parts 35.
Fig. 7 (a) and Fig. 7 (b) is the figure of the change for illustration of the aperture opening ratio circumferentially in the peripheral part of the insertion parts 35 involved by embodiment.In Fig. 7 (a), part 1 region 39a is by the part in the circular region (i.e. the peripheral part of insertion parts 35) of concentric circles 42a, 42b encirclement being common center with the center 37 of insertion parts 35.And in Fig. 7 (b), part 2 region 39b is by the part in the circular region of concentric circles 42a, 42b encirclement being common center with the center 37 of insertion parts 35, is the region different from the part 1 region 39a shown in Fig. 7 (a).In Fig. 7 (a) and Fig. 7 (b), concentric circles 42a can be consistent with the periphery of insertion parts 35.In addition, part 1 region 39a and part 2 region 39b all determines in the mode at least comprising an opening portion 36.
Part 1 region 39a is different regions from part 2 region 39b, and therefore aperture opening ratio is also different.But the insertion parts 35 involved by embodiment is configured to opening portion 36 and periodically occurs in the circumferential.Therefore, even if part 1 region 39a and part 2 region 39b is zones of different, the difference of its aperture opening ratio also drops in prescribed limit R.
Fig. 8 (a) and Fig. 8 (b) is the concept map of the change of the aperture opening ratio of the insertion parts 35 represented involved by embodiment.More specifically, Fig. 8 (a) is the curve map of the variation tendency of the aperture opening ratio of the radial direction represented along insertion parts 35, and Fig. 8 (b) is the curve map of the variation tendency of the aperture opening ratio of the circumference represented along insertion parts 35.As 8 (a) and Fig. 8 (b) represent that setting at least comprises the subregion of an opening portion 36 to derive the situation of aperture opening ratio.
As mentioned above, in the insertion parts 35 involved by embodiment, the density of the opening portion 36 in peripheral part is greater than the density of the opening portion 36 in inner peripheral portion.Therefore, as shown in Fig. 8 (a), the aperture opening ratio of insertion parts 35 more more increases away from central part along radial direction.
On the other hand, the insertion parts 35 involved by embodiment is configured to opening portion 36 and periodically occurs in the circumferential.Therefore, as being illustrated with reference to figure 7 (a) and Fig. 7 (b), when the aperture opening ratio distance in the radial direction of insertion parts 35 is equal, even if circumferentially move, the difference of aperture opening ratio also drops in prescribed limit R.Thus, in insertion parts 35, the difference of flow path resistance circumferentially also falls within the specific limits.Therefore, no matter passed through any position in the circumference of insertion parts 35 by the refrigerant gas of insertion parts 35, the slip of flow velocity all drops in certain limit R.Therefore, by inserting insertion parts 35, the flow velocity of the refrigerant gas of flowing in the 2nd regenerator 34 can be made close to impartial, and have nothing to do with the position of the 2nd regenerator 34 inside.
By making the velocity flow profile of the refrigerant gas of flowing in the 2nd regenerator 34 close to impartial, the Temperature Distribution of the cool storage material on the direction of the long axis normal with the 2nd regenerator 34 also becomes impartial.Thus, for being contained in the cool storage material of the 2nd regenerator 34, the heat on the direction of the long axis normal with the 2nd regenerator 34 can being suppressed to move, thus the loss of entropy can be suppressed.Therefore, the efficiency of the 2nd regenerator 34 is improved, and then can improve the refrigeration performance of the regenerative refrigerator 1 possessing the 2nd regenerator 34.
But if insertion parts 35 is inserted into the 2nd regenerator 34, then the cool storage material that can be filled in the 2nd regenerator 34 reduces the amount corresponding to the volume of insertion parts 35.The reason that the refrigeration performance that the minimizing being filled in the cool storage material of the 2nd regenerator 34 likely becomes the regenerative refrigerator 1 possessing the 2nd regenerator 34 declines.
Therefore, the insertion parts 35 involved by embodiment can be made to possess the function of above-mentioned partition member 23, and replace partition member 23 and be inserted into the 2nd regenerator 34.As mentioned above, the 2nd regenerator 34 accommodates the 2nd cool storage material and the 3rd cool storage material with the 2nd cool storage material unlike material respectively in high temperature side region 24 and low temperature side region 25.The filter that restriction the 2nd cool storage material and the 3rd cool storage material pass through is set at the two ends of the opening portion 36 of insertion parts 35, and is inserted into the border of the 2nd cool storage material and the 3rd cool storage material.Thereby, it is possible to make insertion parts 35 possess the function of above-mentioned partition member 23.
Because partition member 23 is just contained in the 2nd regenerator 34 originally, even if therefore partition member 23 is replaced by insertion parts 35, therefore and than ever the cool storage material being filled in the 2nd regenerator 34 also can not reduce.When insertion parts 35 is thicker than partition member 23 in the past, the cool storage material being filled in the 2nd regenerator 34 reduces the amount corresponding with the thickness difference of partition member 23 to insertion parts 35 than ever.But compared with when also insertion parts 35 being inserted into the 2nd regenerator 34 except partition member 23, its impact can be inhibited.Thereby, it is possible to maintain the amount being filled in the cool storage material of the 2nd regenerator 34, and make the velocity flow profile of the refrigerant gas of flowing in the 2nd regenerator 34 close to impartial.Or, insertion parts 35 can be configured in the position adjacent with partition member 23.
As described above, according to the 2nd regenerator 34 of the present invention, the efficiency of regenerator can be improved.
Above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to above-described embodiment, without departing from the present invention, can to above-described embodiment various distortion and displacement in addition.
Above, mainly situation insertion parts 35 being inserted into the 2nd regenerator 34 is illustrated.Except the 2nd regenerator 34, insertion parts 35 the 1st regenerator 9 be can also be inserted into, or the 2nd regenerator 34 and the 1st regenerator 9 insertion parts 35 can be inserted into.Now, in conjunction with the size of the inner peripheral portion of the 1st regenerator 9, suitably amplify insertion parts 35 and use.Due to the efficiency of the 1st regenerator 9 can be improved, therefore, it is possible to improve the refrigeration performance of regenerative refrigerator 1 further.
In above-mentioned regenerative refrigerator, illustrated that progression is the situation of secondary, but this progression can be one-level, also can suitably be chosen as more than three grades.Further, in embodiments, be that the example of the GM refrigeration machine of displacer formula is illustrated to regenerative refrigerator, but be not limited thereto.Such as, the present invention can also be applicable to the GM refrigeration machine, sterlin refrigerator, Suhl prestige refrigeration machine etc. of pulse tube.
Claims (4)
1. a regenerator, is characterized in that, possesses:
Cool storage material, puts aside the cold produced by the expansion of refrigerant gas;
Cylindrical container, holds described cool storage material, and circulation has refrigerant gas; And
Insertion parts, is contained in described container, and identical at the thickness axially of described container,
Described insertion parts is at least formed with the opening portion of the stream becoming refrigerant gas at peripheral part, and the integral finish rate of described insertion parts is greater than the aperture opening ratio of described insertion parts at central part.
2. regenerator according to claim 1, is characterized in that,
The aperture opening ratio of described insertion parts is arranged to, and becomes prescribed limit at the aperture opening ratio at least comprised in the part 1 region of an opening portion of the peripheral part of described insertion parts with the difference of the aperture opening ratio in the part 2 region different from described part 1 region in the peripheral part of described insertion parts.
3. regenerator according to claim 1 and 2, is characterized in that,
Described insertion parts possesses multiple opening portions of same shape, and the density of opening portion in peripheral part is greater than the density of the opening portion in inner peripheral portion.
4. regenerator according to any one of claim 1 to 3, is characterized in that,
Described cool storage material comprises the 1st cool storage material and the 2nd cool storage material with described 1st cool storage material unlike material,
Described 1st cool storage material and described 2nd cool storage material are contained in different regions by described container respectively,
Described insertion parts possesses described 1st cool storage material of restriction and described 2nd cool storage material by the filter of described opening portion, and is inserted in the border of described 1st cool storage material and described 2nd cool storage material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-055903 | 2014-03-19 | ||
| JP2014055903A JP6284794B2 (en) | 2014-03-19 | 2014-03-19 | Regenerator |
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| CN104930742A true CN104930742A (en) | 2015-09-23 |
| CN104930742B CN104930742B (en) | 2018-07-06 |
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Cited By (1)
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| CN108645069A (en) * | 2018-06-04 | 2018-10-12 | 中船重工鹏力（南京）超低温技术有限公司 | Shut-off member for regenerator and the Cryo Refrigerator using the shut-off member |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104930742B (en) | 2018-07-06 |
| JP6284794B2 (en) | 2018-02-28 |
| JP2015178916A (en) | 2015-10-08 |
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