CN117628736A - Low-temperature elastic heating refrigerating system - Google Patents
Low-temperature elastic heating refrigerating system Download PDFInfo
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- CN117628736A CN117628736A CN202210987820.9A CN202210987820A CN117628736A CN 117628736 A CN117628736 A CN 117628736A CN 202210987820 A CN202210987820 A CN 202210987820A CN 117628736 A CN117628736 A CN 117628736A
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- 238000010438 heat treatment Methods 0.000 title description 27
- 238000005057 refrigeration Methods 0.000 claims abstract description 58
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000001172 regenerating effect Effects 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 16
- 230000000704 physical effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- -1 copper-aluminum-manganese Chemical compound 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a low-temperature elastic thermal refrigerating system, and relates to the technical field of low-temperature refrigeration. The low-temperature elastic thermal refrigerating system comprises a shell, wherein the shell comprises: a cold head; a heat sink; the heat flicking piece is arranged between the cold head and the heat sink; the driving device is in transmission connection with the heat flicking piece and is used for driving the heat flicking piece to reciprocate so as to enable the heat flicking piece to be in thermal contact with the cold head or the heat sink; when the heat flicking piece is in thermal contact with the cold head, the heat flicking piece is in a shrinkage heat absorption state; when the thermal spring is in thermal contact with the heat sink, the thermal spring is in a stretched exothermic state. The low-temperature elastic thermal refrigerating system provided by the invention realizes the refrigerating cycle of the system by utilizing the characteristics of heat absorption when the elastic thermal element contracts and heat release when the elastic thermal element stretches, does not need to be provided with intermediate fluid, and avoids the problem of low refrigerating efficiency of the system caused by severe change of physical properties of the intermediate fluid.
Description
Technical Field
The invention relates to the technical field of low-temperature refrigeration, in particular to a low-temperature elastic thermal refrigeration system.
Background
Low temperature plays an important role in the fields of energy, medical treatment and high technology. The existing refrigeration modes at low temperature mainly comprise six modes: GM, stirling, pulse tube and inverse brayton refrigeration techniques based on fluid expansion refrigeration effects and multi-stage cascade and mixed refrigerant refrigeration techniques based on fluid throttling refrigeration effects.
However, in both refrigeration systems based on fluid expansion and fluid throttling characteristics, an intermediate fluid is required to complete thermodynamic cycle, and the physical properties of the fluid are severely changed along with the decrease of temperature, so that the physical properties of the fluid are difficult to perfectly match by the existing process technology, the physical properties of the fluid are difficult to fully and accurately consider when the system is designed, and meanwhile, the throttling, expansion and backheating processes of the fluid can generate larger loss of thermodynamic fire, the thermodynamic perfection is reduced, and the further improvement of the efficiency of the refrigeration system at low temperature and the miniaturization development of refrigeration devices are not facilitated.
Disclosure of Invention
The invention provides a low-temperature elastic thermal refrigerating system which is used for solving the technical problems that a refrigerating system in the prior art depends on intermediate fluid and has lower refrigerating efficiency.
The invention provides a low-temperature elastic thermal refrigerating system, which comprises a shell, wherein the shell comprises the following components:
a cold head;
a heat sink;
the heat flicking piece is arranged between the cold head and the heat sink;
the driving device is in transmission connection with the heat flicking piece and is used for driving the heat flicking piece to reciprocate so as to enable the heat flicking piece to be in thermal contact with the cold head or the heat sink;
when the heat flicking piece is in thermal contact with the cold head, the heat flicking piece is in a shrinkage heat absorption state; when the thermal spring is in thermal contact with the heat sink, the thermal spring is in a stretched exothermic state.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the central area of the end part of the heat sink is protruded towards the direction approaching the elastic thermal piece relative to the surrounding area.
According to the low-temperature elastic heat refrigerating system provided by the invention, the low-temperature elastic heat refrigerating system further comprises a radiation radiator, and the radiation radiator is connected with the heat sink.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the low-temperature elastic thermal refrigerating system further comprises a throttling component, wherein the throttling component comprises a compressor, a condenser, a throttling valve and an evaporator which are sequentially communicated, and the compressor, the condenser, the throttling valve and the evaporator form a circulating loop of refrigerating working medium;
the heat sink is in thermal contact with the evaporator.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the throttling component further comprises a regenerative heat exchanger, the regenerative heat exchanger comprises a first regenerative channel and a second regenerative channel, the first regenerative channel is respectively connected with the condenser and the throttling valve in series, and the second regenerative channel is respectively connected with the evaporator and the compressor in series.
According to the low-temperature elastic heat refrigerating system provided by the invention, a plurality of elastic heat pieces are arranged at intervals along the direction from the cold head to the heat sink, and the elastic heat pieces synchronously move under the drive of the driving device;
the low-temperature elastic heat refrigerating system further comprises an intermediate heat exchanger, wherein an intermediate heat exchanger is arranged between any two adjacent elastic heat pieces, the intermediate heat exchanger comprises a first heat exchange surface and a second heat exchange surface which are away from each other, the first heat exchange surface is used for thermally contacting the elastic heat pieces which are close to the heat sink and are in a shrinkage heat absorption state, and the second heat exchange surface is used for thermally contacting the elastic heat pieces which are close to the cold head and are in a stretching heat release state.
According to the low-temperature elastic heating refrigerating system provided by the invention, the elastic heating piece comprises a first elastic heating piece and a second elastic heating piece, and the first elastic heating piece and the second elastic heating piece are respectively positioned at two sides of the cold head;
the heat sink comprises a first heat sink and a second heat sink, the first heat sink is positioned on one side of the first heat flicking piece, which is away from the cold head, and the second heat sink is positioned on one side of the second heat flicking piece, which is away from the cold head;
the distance between the first heat sink and the second heat sink is less than the distance between the first and second thermal spring mounting locations.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the number of the first heat sinks and the number of the second heat sinks are two, the two first heat sinks are arranged in an inclined mode, the intersection point of the extension lines of the two first heat sinks along the inclined direction is located in the direction close to the cold head, the two second heat sinks are arranged in an inclined mode, and the intersection point of the extension lines of the two second heat sinks along the inclined direction is located in the direction close to the cold head.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the low-temperature elastic thermal refrigerating system further comprises two heat insulation fixing pieces, the two heat insulation fixing pieces are distributed on two sides of the cold head, and the heat insulation fixing pieces are used for fixing the first elastic thermal piece or the second elastic thermal piece part on the cold head.
According to the low-temperature elastic thermal refrigerating system provided by the invention, the low-temperature elastic thermal refrigerating system further comprises a heat preservation component, and the heat preservation component is covered outside the shell.
According to the low-temperature elastic heating refrigerating system, the elastic heating part is arranged, so that the refrigerating cycle of the system is realized by utilizing the characteristics of heat absorption during shrinkage and heat release during stretching of the elastic heating part, intermediate fluid is not required to be arranged, and the problem of low refrigerating efficiency of the system due to severe physical property change of the intermediate fluid is avoided; through setting up drive arrangement and bullet hot piece transmission and being connected, drive bullet hot piece reciprocating motion, make bullet hot piece and cold head or heat sink directly exchange heat through the thermal contact, realize the coupling of power and heat transfer, be favorable to reducing the system volume simultaneously, improved the suitability of low temperature bullet hot refrigerating system in each field.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a two-stage low-temperature elastic thermal refrigeration system according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a three-stage low-temperature elastic thermal refrigeration system according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system in an initial state according to a fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system according to a fifth embodiment of the present invention when the second elastic thermal element is in a contracted heat absorbing state;
fig. 8 is a schematic structural diagram of a low-temperature elastic thermal refrigeration system according to a fifth embodiment of the present invention when the first elastic thermal element is in a contracted heat absorbing state.
Reference numerals:
1: a cold head; 2: a heat sink; 21: a first heat sink; 22: a second heat sink; 3: a heating element; 31: a first spring heating element; 32: a second spring heating element; 301: a primary spring heating element; 302: a secondary spring heating element; 303: a third-stage heat-ejecting piece; 4: a driving device; 5: a radiant heat sink; 61: a compressor; 62: a condenser; 63: a throttle valve; 64: an evaporator; 65: a regenerative heat exchanger; 651: a first heat return channel; 652: a second heat return channel; 7: an intermediate heat exchanger; 701: a primary intermediate heat exchanger; 702: a second-stage intermediate heat exchanger; 8: and a heat insulating fixing member.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 to 8, the low-temperature elastic thermal refrigeration system provided by the invention comprises a shell, wherein the shell comprises a cold head 1, a heat sink 2, an elastic thermal element 3 and a driving device 4.
The spring heating element 3 is arranged between the cold head 1 and the heat sink 2. The driving device 4 is in transmission connection with the heat flicking piece 3, and the driving device 4 is used for driving the heat flicking piece 3 to reciprocate so as to enable the heat flicking piece 3 to be in thermal contact with the cold head 1 or the heat sink 2.
When the heat-ejecting member 3 is in thermal contact with the cold head 1, the heat-ejecting member 3 is in a contracted heat-absorbing state; when the thermal spring 3 is in thermal contact with the heat sink 2, the thermal spring 3 is in a stretched exothermic state.
The heat-ejection member 3 is made of heat-ejection materials such as nickel-titanium alloy, copper-aluminum-manganese alloy and the like, and the intrinsic efficiency of the heat-ejection materials is high and can reach more than 80%; there is a significant refrigeration effect (entropy change of tens of J.kg-1.K-1) in a wide temperature range of 4K to 300K. Different phase transformation processes are realized based on force loading and unloading by utilizing the elasto-thermal refrigeration technology, and the heat conductivity coefficient is high, so that efficient heat transfer can be realized.
The elastic heating element 3 is heated up when being stretched, releases heat to the outside, and is cooled down when being contracted, and absorbs heat to the outside. Specifically, when the driving device 4 drives the heat flicking piece 3 to move towards the direction approaching the heat sink 2, the heat flicking piece 3 is in contact with the heat sink 2 and continuously stretches along with the movement of the driving device, and the heat flicking piece 3 transmits heat to the heat sink 2; when the driving device 4 drives the heat flicking piece 3 to move from the heat sink 2 to the direction approaching the cold head 1, the heat flicking piece 3 gradually contracts and reduces in volume along with the movement of the driving device, and when the heat flicking piece 3 contacts with the cold head 1, the heat flicking piece 3 is in a minimum volume state and absorbs the heat of the cold head 1, and a low-temperature environment is formed at the cold head 1, so that the cold head 1 outputs cold energy to the outside.
The driving device 4 can be a linear driving piece such as a linear motor, an electric push rod, an air cylinder and the like, and the driving device 4 is used for driving the heat spring piece 3 to linearly reciprocate so as to realize refrigeration cycle.
According to the low-temperature elastic heating refrigerating system provided by the invention, the elastic heating part 3 is arranged, so that the refrigerating cycle of the system is realized by utilizing the characteristics of heat absorption when the elastic heating part 3 contracts and heat release when the elastic heating part stretches, intermediate fluid is not required to be arranged, and the problem of low refrigerating efficiency of the system caused by severe physical property change of the intermediate fluid is avoided; through setting up drive arrangement 4 and bullet hot piece 3 transmission and being connected, drive bullet hot piece 3 reciprocating motion, make bullet hot piece 3 and cold head 1 or heat sink 2 directly exchange heat through the thermal contact, realize the coupling of power and heat transfer, be favorable to reducing the system volume simultaneously, improved the suitability of low temperature bullet hot refrigerating system in each field.
In order to illustrate the working principle of the low temperature elastic thermal refrigeration system of the present invention, the following description is divided into different embodiments.
Example 1
As shown in fig. 1, the low-temperature elastic thermal refrigeration system provided in the first embodiment includes a cold head 1, a heat sink 2, an elastic thermal element 3 and a driving device 4.
The end part of the heat sink 2, which is close to the cold head 1, is outwards protruded to improve deformation quantity and heat release quantity of the heat flicking piece 3, and meanwhile, the heat flicking piece 3 is attached to the end surface of the heat sink 2, so that efficient heat dissipation of the heat flicking piece 3 is realized.
Further, the central region of the end of the heat sink 2 is convex in a direction approaching the heat element 3 with respect to the peripheral region. Specifically, the longitudinal section of the heat sink 2 may be trapezoidal, triangular, arc-shaped, etc., and the present invention is not particularly limited. For example, as shown in fig. 1, the longitudinal section of the heat sink 2 is trapezoidal, and as the driving device 4 gradually moves toward the heat sink 2, the heat-ejecting member 3 contacts with the end of the heat sink 2 and is continuously stretched, and the heat-ejecting member 3 transfers heat to the heat sink 2 in a direct contact manner.
In this embodiment one, the heat sink 2 is cooled directly by dissipating heat to the air.
The working principle of the low-temperature elastic thermal refrigerating system provided by the first embodiment is as follows: as shown in fig. 1, when the driving device 4 drives the heat-ejecting member 3 to move rightward, the heat-ejecting member 3 is in contact with the heat sink 2 and is continuously stretched, and the heat-ejecting member 3 transfers heat to the heat sink 2; when the driving device 4 drives the heat-flicking piece 3 to move leftwards, the heat-flicking piece 3 gradually contracts and the volume is reduced, and when the heat-flicking piece 3 contacts with the cold head 1, the heat-flicking piece 3 is in a state of minimum volume and absorbs the heat of the cold head 1, and a low-temperature environment is formed at the cold head 1.
Example two
The difference between the low-temperature elastic heat refrigerating system provided by the second embodiment and the low-temperature elastic heat refrigerating system provided by the first embodiment is that: the low-temperature elastic thermal refrigeration system provided in the second embodiment further comprises a radiation radiator 5.
As shown in fig. 2, the radiation radiator 5 is connected with the heat sink 2, the heat sink 2 radiates heat through the radiation radiator 5, and the low-temperature elastic thermal refrigeration system provided in the second embodiment can be applied to the field of aviation technology.
Example III
The low-temperature elastic heat refrigerating system provided in the third embodiment is different from the low-temperature elastic heat refrigerating system provided in the first embodiment only in that: the low temperature elasto-thermal refrigeration system provided by this embodiment also includes a throttling assembly.
As shown in fig. 3, the throttle assembly includes a compressor 61, a condenser 62, a throttle valve 63, and an evaporator 64, which are sequentially connected, and the compressor 61, the condenser 62, the throttle valve 63, and the evaporator 64 constitute a circulation circuit of a refrigerant. The heat sink 2 is in thermal contact with the evaporator 64.
In the third embodiment, the heat sink 2 dissipates heat through the throttle assembly. Specifically, the evaporator 64 may be embedded in the heat sink 2 to achieve direct contact with the heat sink 2, thereby cooling the heat sink 2.
The refrigerant is heated and pressurized in the compressor 61 to become high temperature and high pressure gas, which then enters the condenser 62 to release heat; then the temperature is reduced by throttling through a throttle valve 63, and the heat is absorbed by flowing into an evaporator 64, so that the temperature of the heat sink 2 is reduced; the refrigerant absorbs heat and evaporates in the evaporator 64, and enters the compressor 61 again, and the refrigerant repeatedly circulates in this way to cool the heat sink 2.
Further, the throttle assembly further comprises a regenerative heat exchanger 65, the regenerative heat exchanger 65 comprises a first regenerative channel 651 and a second regenerative channel 652, the first regenerative channel 651 is respectively connected in series with the condenser 62 and the throttle valve 63, and the second regenerative channel 652 is respectively connected in series with the evaporator 64 and the compressor 61.
The refrigerant circulates in a clockwise direction in the throttle assembly as shown in fig. 3. The regenerative heat exchanger 65 can exchange heat between the low-temperature refrigerant gas from the evaporator 64 and the normal-temperature refrigerant liquid from the condenser 62, so that the refrigerant before throttling is supercooled and the refrigerant before entering the compressor 61 is overheated, the unit refrigerating capacity is improved, and the cooling effect on the heat sink 2 is enhanced.
In the third embodiment, by setting the throttling assembly, efficient heat dissipation is achieved on the heat sink 2, meanwhile, the temperature of the heat-ejecting member 3 is reduced by the heat sink 2 in the stretching heat release state, the heat-ejecting member 3 has lower temperature in the shrinkage heat absorption state, the lowest output temperature of the low-temperature heat-ejecting refrigerating system is reduced, and the refrigerating efficiency of the low-temperature heat-ejecting refrigerating system is improved.
Example IV
As shown in fig. 4 and 5, in the low-temperature elastic thermal refrigeration system provided in the fourth embodiment, a plurality of elastic thermal pieces 3 are provided, the plurality of elastic thermal pieces 3 are distributed at intervals along the direction from the cold head to the heat sink 2, and the plurality of elastic thermal pieces 3 are driven by the driving device 4 to move synchronously. The low-temperature elastic heat refrigerating system further comprises an intermediate heat exchanger 7, an intermediate heat exchanger 7 is arranged between any two adjacent elastic heat pieces 3, the intermediate heat exchanger 7 comprises a first heat exchange surface and a second heat exchange surface which are away from each other, the first heat exchange surface is used for being in thermal contact with the elastic heat pieces 3 which are close to the heat sink 2 and are in a shrinkage heat absorption state, and the second heat exchange surface is used for being in thermal contact with the elastic heat pieces 3 which are close to the cold head 1 and are in a stretching heat release state. Wherein the first heat exchanging surface of each intermediate heat exchanger 7 is located at a side close to the heat sink 2 and the second heat exchanging surface is located at a side close to the cold head 1.
By arranging the plurality of heat spring pieces 3 and the intermediate heat exchanger 7, the heat spring refrigeration cycle can be overlapped in multiple layers, and the low-temperature heat spring refrigeration system is facilitated to realize lower refrigeration temperature.
Specifically, under the condition that the elastic heating refrigeration cycle is overlapped by N stages, the number of elastic heating elements is N, and the number of intermediate heat exchangers 7 is N-1. From the heat sink 2 to the cold head 1, each heat ejecting piece 3 is a first-stage heat ejecting piece 301, a second-stage heat ejecting piece 302, a third-stage heat ejecting piece 303 … … N-1-stage heat ejecting piece and an N-stage heat ejecting piece in sequence; from the heat sink 2 to the cold head 1, the intermediate heat exchangers 7 are a first-stage intermediate heat exchanger 701, a second-stage intermediate heat exchanger 702, a … … N-2-stage intermediate heat exchanger and an N-1-stage intermediate heat exchanger in sequence. Wherein N > 0 and is an integer.
The plurality of heat flicking pieces 3 synchronously move under the drive of the driving device to synchronously absorb or release heat. When the driving device 4 drives the plurality of heat-ejecting pieces 3 to move towards the direction close to the heat sink 2, so that the primary heat-ejecting piece 301 contacts with the heat sink 2 and stretches to release heat, the secondary heat-ejecting piece 302 contacts with the second heat exchange surface of the primary intermediate heat exchanger 701 and stretches to release heat, the tertiary heat-ejecting piece 303 contacts with the second heat exchange surface of the secondary intermediate heat exchanger 702 and stretches to release heat, and the … … i stage heat-ejecting piece contacts with the second heat exchange surface of the i-1 stage intermediate heat exchanger and stretches to release heat; when the driving device 4 drives the plurality of heat-ejection pieces 3 to move towards the direction close to the cold head 1, so that the N-stage heat-ejection pieces contact with the cold head 1 and shrink to absorb heat, the first-stage heat-ejection piece 301 contacts with the first heat exchange surface of the first-stage intermediate heat exchanger 701 and shrink to absorb heat, and the second-stage heat-ejection piece 302 contacts with the first heat exchange surface of the second-stage intermediate heat exchanger 702 and shrink to absorb heat … … i-stage heat-ejection pieces contact with the first heat exchange surface of the i-stage intermediate heat exchanger and shrink to absorb heat. It is understood that 0<i N and i is an integer.
In the process, the i-level heat-ejecting member releases heat at the i-1 level intermediate heat exchanger and absorbs heat at the i-level intermediate heat exchanger, so that the temperature of the i-level intermediate heat exchanger is reduced, the temperature of the i+1 level heat-ejecting member is reduced when the i+1 level heat-ejecting member contacts with the first heat exchange surface of the i-level intermediate heat exchanger, the temperature of the i+1 level heat-ejecting member is further reduced when the i+1 level heat-ejecting member contacts with the first heat exchange surface of the i+1 level intermediate heat exchanger, and larger cold energy is output. In this way, the temperature of each stage of intermediate heat exchanger 7 is sequentially reduced along the direction from the heat sink 2 to the cold head 1 in the shrinkage heat absorption state of the plurality of heat-ejecting members 3, the refrigeration temperature of each stage of heat-ejecting members 3 is sequentially reduced, finally the heat absorption capacity of the N stages of heat-ejecting members 3 at the cold head 1 is maximized, and the temperature of the cold head 1 is lower than the temperature of each stage of intermediate heat exchanger 7, so that the low-temperature heat-ejecting system has lower refrigeration temperature.
In a specific embodiment, as shown in fig. 4, the system is a two-stage low-temperature heat-flicking refrigeration system, two heat flicking pieces 3 are provided, one heat flicking piece 3 on the right side is a first-stage heat flicking piece 301, and the other heat flicking piece 3 on the left side is a second-stage heat flicking piece 302. An intermediate heat exchanger 7 is arranged between the two heat-ejecting pieces 3, and the primary heat-ejecting piece 301 and the secondary heat-ejecting piece 302 synchronously move and synchronously absorb and release heat under the drive of the driving device 4.
In this embodiment, when the driving device 4 drives the two heat-ejecting members 3 to move rightward, so that the primary heat-ejecting member 301 contacts with the heat sink 2 and stretches to release heat, the secondary heat-ejecting member 302 contacts with the second heat-exchanging surface of the intermediate heat exchanger 7 and stretches to release heat; when the driving device 4 drives the two heat-ejecting pieces 3 to move leftwards, the first-stage heat-ejecting piece 301 contacts with the first heat exchange surface of the intermediate heat exchanger 7 and contracts to absorb heat, and the second-stage heat-ejecting piece 302 contacts with the cold head 1 and contracts to absorb heat. The primary heat-ejecting member 301 reduces the temperature of the intermediate heat exchanger 7 in the shrinkage heat-absorbing state, so that the secondary heat-ejecting member 302 emits more heat when contacting with the second heat-exchanging surface of the intermediate heat exchanger 7 to release heat, and the secondary heat-ejecting member 302 further reduces the temperature when contacting with the cold head 1 to absorb heat, so that the cold head 1 has a lower refrigeration temperature.
In yet another specific embodiment, as shown in fig. 5, the system is a three-stage low-temperature heat-flicking refrigeration system, three heat flicking pieces 3 are arranged, in the direction from the heat sink 2 to the cold head 1, the three heat flicking pieces 3 are a first-stage heat flicking piece 301, a second-stage heat flicking piece 302 and a third-stage heat flicking piece 303 in sequence, a first-stage intermediate heat exchanger 701 is arranged between the first-stage heat flicking piece 301 and the second-stage heat flicking piece 302, and a second-stage intermediate heat exchanger 702 is arranged between the second-stage heat flicking piece 302 and the third-stage heat flicking piece 303. The working principle of the three-stage low-temperature elastic thermal refrigerating system is the same as that of the two-stage low-temperature elastic thermal refrigerating system, and the working principle is not repeated here. In this embodiment, the temperatures of the primary heat-ejecting member 301, the secondary heat-ejecting member 302 and the tertiary heat-ejecting member 303 after absorbing heat are sequentially reduced, and the refrigeration temperature output by the cold head 1 is further reduced relative to the secondary low-temperature heat-ejecting refrigeration system.
The central area of the first heat exchange surface protrudes towards the direction close to the cold head 1 relative to the peripheral area, for example, the longitudinal section of the first heat exchange surface can be trapezoid, triangle, arc-shaped and the like, which is beneficial to improving the deformation quantity and the heat release quantity of the heat ejection member 3. The second heat exchange surface is a plane, so that the shrinkage heat absorption effect of the heat-ejecting member 3 is ensured. Optionally, the shape of the intermediate heat exchanger 7 is the same as the shape of the heat sink 2.
Preferably, the low-temperature elastic thermal refrigeration system of the fourth embodiment comprises a throttling assembly to form an N-level throttling cascade refrigeration system, and is suitable for being applied to the field of very low temperature.
It should be noted that the heat dissipation method of the heat sink 2 is not limited to those of fig. 4 and 5, and any one of the heat dissipation methods or the heat dissipation structures of the first to third embodiments may be applied to the fourth embodiment.
Example five
As shown in fig. 6, in the fifth embodiment, the heat-ejecting member 3 includes a first heat-ejecting member 31 and a second heat-ejecting member 32, and the first heat-ejecting member 31 and the second heat-ejecting member 32 are respectively located on both sides of the coldhead 1.
The heat sink 2 comprises a first heat sink 21 and a second heat sink 22, the first heat sink 21 and the second heat sink 22 are respectively located at two sides of the cold head 1, the first heat sink 21 is located at one side of the first elastic heat element 31 facing away from the cold head 1, and the second heat sink 22 is located at one side of the second elastic heat element 32 facing away from the cold head 1.
The distance between the first heat sink 21 and the second heat sink 22 is smaller than the distance between the mounting positions of the first and second thermal spring members 31, 32. The installation position of the first thermal element 31 or the second thermal element 32 is a position where the first thermal element 31 or the second thermal element 32 is connected with the driving device 4. Along with the driving device 4 driving the two heat-ejecting members 3 to reciprocate, the arrangement makes at most one of the first heat-ejecting member 31 and the second heat-ejecting member 32 in the same time be in a shrinkage heat-absorbing state, so that the alternate refrigeration of the first heat-ejecting member 31 and the second heat-ejecting member 32 is realized.
As shown in fig. 6, in the initial state, the first and second elastic members 31 and 32 are blocked by the heat sink 2 or other fixing member and a stretch is generated, and the first and second elastic members 31 and 32 exhibit a state symmetrical to each other. As the driving device 4 moves in a direction approaching the first heat sink 21, the stretching degree of the first heat-ejecting member 31 gradually increases, and the second heat-ejecting member 32 gradually contracts until the second heat-ejecting member 32 reaches the minimum volume state as shown in fig. 7, at this time, the second heat-ejecting member 32 absorbs heat to the cold head 1, and the first heat-ejecting member 31 contacts with the first heat sink 21 and stretches to release heat. As the driving device 4 moves toward the second heat sink 22, the stretching degree of the second heat-ejecting member 32 gradually increases, and the first heat-ejecting member 31 gradually contracts, the first heat-ejecting member 31 and the second heat-ejecting member 32 return to the initial state, and then the driving device 4 continues to move toward the second heat sink 22 until the first heat-ejecting member 31 reaches the minimum volume state as shown in fig. 8, at which time the first heat-ejecting member 31 absorbs heat to the cold head 1, and the second heat-ejecting member 32 contacts with the second heat sink 22 and stretches to release heat. The first elastic heating element 31 and the second elastic heating element 32 alternately refrigerate the cold head 1 in a reciprocating cycle in this way, so that the refrigeration cycle is shortened, and the continuous refrigeration of the low-temperature elastic heating refrigeration system is realized.
Further, the two first heat sinks 21 and the two second heat sinks 22 are both two, the two first heat sinks 21 are obliquely arranged with each other, the intersection point of the extension lines of the two first heat sinks 21 along the oblique direction is located in the direction close to the cold head 1, the two second heat sinks 22 are obliquely arranged with each other, and the intersection point of the extension lines of the two second heat sinks 22 along the oblique direction is located in the direction close to the cold head 1. It will be appreciated that the first heat sink 21 and the second heat sink 22 may also be convex structures at the ends in the first embodiment.
As shown in fig. 6, the first heat sink 21 and the second heat sink 22 are symmetrical about a horizontal line, the two first heat sinks 21 are symmetrical about a vertical line, and the two second heat sinks 22 are symmetrical about a vertical line. In the initial state, the first and second heat-ejecting members 31 and 32 may be respectively contacted with the ends of the first and second heat sinks 21 and 22 near the cold head 1, so that the first and second heat-ejecting members 31 and 32 are blocked and stretched by the ends of the first and second heat sinks 21 and 22 to realize the heat absorption by the alternate contraction of the first and second heat-ejecting members 31 and 32.
Moreover, by arranging the two first heat sinks 21 and the two second heat sinks 22 to incline, deformation of the inclined surfaces of the first heat bouncing piece 31 attached to the two first heat sinks 21 and deformation of the inclined surfaces of the second heat bouncing piece 32 attached to the two second heat sinks 22 are facilitated, the heat exchange area is increased, and the heat exchange effect is improved.
Further, the low-temperature elastic thermal refrigeration system provided in the fifth embodiment further includes two heat insulation fixing pieces 8, the two heat insulation fixing pieces 8 are distributed on two sides of the cold head 1, and the heat insulation fixing pieces 8 are used for fixing the first elastic thermal piece 31 or the second elastic thermal piece 32 to the cold head partially.
As shown in fig. 6, the two heat insulating fixing members 8 are symmetrically arranged relative to the horizontal line, and the middle part of the first heat ejecting member 31 or the second heat ejecting member 32 is fixed on the cold head 1, so that the stability of the first heat ejecting member 31 or the second heat ejecting member 32 during movement is improved. The heat insulation fixing piece 8 has good heat insulation performance, and can avoid the influence of the temperature of the heat insulation fixing piece on the cold head 1.
On the basis of any one of the embodiments, the low-temperature elastic thermal refrigerating system further comprises a heat preservation component, the heat preservation component is covered outside the shell, heat transfer between the low-temperature elastic thermal refrigerating system and an external environment is reduced, and refrigerating effect of the low-temperature elastic thermal refrigerating system is guaranteed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A low temperature elasto-thermal refrigeration system comprising a housing, wherein the housing comprises:
a cold head;
a heat sink;
the heat flicking piece is arranged between the cold head and the heat sink;
the driving device is in transmission connection with the heat flicking piece and is used for driving the heat flicking piece to reciprocate so as to enable the heat flicking piece to be in thermal contact with the cold head or the heat sink;
when the heat flicking piece is in thermal contact with the cold head, the heat flicking piece is in a shrinkage heat absorption state; when the thermal spring is in thermal contact with the heat sink, the thermal spring is in a stretched exothermic state.
2. The low temperature spring thermal refrigeration system of claim 1, wherein a central region of an end of the heat sink is convex relative to a surrounding region in a direction toward the spring.
3. The low temperature elasto-thermal refrigeration system of claim 2, further comprising a radiant heat sink connected to the heat sink.
4. The low temperature elasto-thermal refrigeration system of claim 2, further comprising a throttling assembly comprising a compressor, a condenser, a throttle valve, and an evaporator in sequential communication, the compressor, the condenser, the throttle valve, and the evaporator forming a refrigeration cycle;
the heat sink is in thermal contact with the evaporator.
5. The low temperature elastic thermal refrigeration system according to claim 4, wherein said throttling assembly further comprises a regenerative heat exchanger comprising a first regenerative channel and a second regenerative channel, said first regenerative channel being respectively in series with said condenser and said throttling valve, said second regenerative channel being respectively in series with said evaporator and said compressor.
6. The cryogenic spring heat refrigeration system according to any one of claims 1 to 5, wherein the spring heat pieces are a plurality of, the spring heat pieces are distributed at intervals along the direction from the cold head to the heat sink, and the spring heat pieces are driven by the driving device to synchronously move;
the low-temperature elastic heat refrigerating system further comprises an intermediate heat exchanger, wherein an intermediate heat exchanger is arranged between any two adjacent elastic heat pieces, the intermediate heat exchanger comprises a first heat exchange surface and a second heat exchange surface which are away from each other, the first heat exchange surface is used for thermally contacting the elastic heat pieces which are close to the heat sink and are in a shrinkage heat absorption state, and the second heat exchange surface is used for thermally contacting the elastic heat pieces which are close to the cold head and are in a stretching heat release state.
7. The cryogenic spring heat refrigeration system of claim 1, wherein the spring heat element comprises a first spring heat element and a second spring heat element, the first spring heat element and the second spring heat element being located on either side of the cold head, respectively;
the heat sink comprises a first heat sink and a second heat sink, the first heat sink is positioned on one side of the first heat flicking piece, which is away from the cold head, and the second heat sink is positioned on one side of the second heat flicking piece, which is away from the cold head;
the distance between the first heat sink and the second heat sink is less than the distance between the first and second thermal spring mounting locations.
8. The low temperature elastic thermal refrigeration system according to claim 7, wherein the first heat sink and the second heat sink are two, the two first heat sinks are arranged obliquely to each other, an intersection point of extension lines of the two first heat sinks along the oblique direction is located in a direction close to the cold head, and the two second heat sinks are arranged obliquely to each other, and an intersection point of extension lines of the two second heat sinks along the oblique direction is located in a direction close to the cold head.
9. The low temperature elasto-thermal refrigeration system of claim 8, further comprising two thermally insulating fasteners distributed on either side of the cold head, the thermally insulating fasteners being used to secure the first elasto-thermal member or the second elasto-thermal member portion to the cold head.
10. The low temperature elasto-thermal refrigeration system of claim 1, further comprising a thermal insulation assembly, wherein the thermal insulation assembly is housed outside the housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987820.9A CN117628736A (en) | 2022-08-17 | 2022-08-17 | Low-temperature elastic heating refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210987820.9A CN117628736A (en) | 2022-08-17 | 2022-08-17 | Low-temperature elastic heating refrigerating system |
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| CN117628736A true CN117628736A (en) | 2024-03-01 |
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| CN202210987820.9A Pending CN117628736A (en) | 2022-08-17 | 2022-08-17 | Low-temperature elastic heating refrigerating system |
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| Country | Link |
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| CN (1) | CN117628736A (en) |
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- 2022-08-17 CN CN202210987820.9A patent/CN117628736A/en active Pending
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