CN112944720A - Shape memory alloy-based refrigerating and heating device - Google Patents
Shape memory alloy-based refrigerating and heating device Download PDFInfo
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- CN112944720A CN112944720A CN202110397480.XA CN202110397480A CN112944720A CN 112944720 A CN112944720 A CN 112944720A CN 202110397480 A CN202110397480 A CN 202110397480A CN 112944720 A CN112944720 A CN 112944720A
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- shape memory
- memory alloy
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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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
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Abstract
The invention discloses a shape memory alloy-based refrigerating and heating device which comprises a rotating shaft and a refrigerating and heating mechanism arranged on the rotating shaft, wherein the refrigerating and heating mechanism comprises a supporting rod arranged along the radial direction of the rotating shaft, a shape memory alloy spring sleeved on the supporting rod and a sliding block in sliding fit with the supporting rod, the shape memory alloy spring is positioned between the rotating shaft and the sliding block, one end of the shape memory alloy spring is fixedly arranged, and the other end of the shape memory alloy spring is fixedly connected with the sliding block. Compared with the existing refrigerating device, the refrigerating and heating device based on the shape memory alloy directly takes gas as a medium, does not need to exchange heat and cold through liquid, and improves the refrigerating efficiency; and, its component structure is simple compact, need not to carry out the setting of many pipelines and a plurality of valves, has reduced weight and volume, has reduced occupation space.
Description
Technical Field
The invention relates to the technical field of refrigerating and heating equipment, in particular to a refrigerating and heating device based on a shape memory alloy.
Background
As is well known, a system that uses external energy to transfer heat from a lower temperature substance (or environment) to a higher temperature substance (or environment) is called a refrigeration system. The refrigeration system generally comprises a refrigerant and four major components, namely a compressor, a condenser, an expansion valve and an evaporator, and the refrigeration principle is as follows: the compressor sucks in the low working medium steam from the evaporator, the low working medium steam is sent to the condenser after the pressure of the low working medium steam is increased, the high pressure liquid is condensed in the condenser, the high pressure liquid is throttled by the throttle valve to be low pressure liquid and then sent to the evaporator, the low pressure steam is obtained by heat absorption and evaporation in the evaporator and then sent to the inlet of the compressor, and therefore the refrigeration cycle is completed.
However, with the rapid development of science and technology, Shape Memory Alloy (SMA) is being gradually applied to a refrigeration system as an intelligent material, for example, two chinese patents with application numbers of CN201820888197.0 and CN201810588121.0, and the patent names of both being "a piston-cylinder refrigeration device based on memory alloy thermo-elastic effect", the disclosed refrigeration device applies the principle of shape memory alloy phase change absorption/heat release, and the medium of heat and cold exchange is liquid, so that the refrigeration efficiency is low, and the liquid passage uses a plurality of pipes and a plurality of valves, which is heavy, large in volume and large in occupied space.
Disclosure of Invention
The invention mainly aims to provide a shape memory alloy-based refrigerating and heating device, and aims to solve the technical problems of low refrigerating efficiency, heavier weight and larger volume of the conventional refrigerating device.
In order to achieve the above purpose, the present invention provides a shape memory alloy-based refrigeration and heating device, which includes a rotating shaft and a refrigeration and heating mechanism disposed on the rotating shaft, wherein the refrigeration and heating mechanism includes a support rod disposed along a radial direction of the rotating shaft, a shape memory alloy spring sleeved on the support rod, and a slider in sliding fit with the support rod, the shape memory alloy spring is located between the rotating shaft and the slider, one end of the shape memory alloy spring is fixedly disposed, and the other end of the shape memory alloy spring is fixedly connected with the slider.
Preferably, the refrigeration and heating mechanism is at least provided with one group, and the refrigeration and heating mechanism comprises a plurality of refrigeration and heating mechanisms arranged along the circumferential direction of the rotating shaft.
Preferably, the cooling and heating mechanisms are arranged in groups along the axial direction of the rotating shaft.
Preferably, the shape memory alloy-based refrigerating and heating device further comprises a fixed shaft sleeve and an outer ring which are arranged corresponding to a group of refrigerating and heating mechanisms;
the fixed shaft sleeve is fixed on the rotating shaft, and two ends of the supporting rods of the plurality of refrigerating and heating mechanisms are respectively connected with the fixed shaft sleeve and the outer ring.
Preferably, the shape memory alloy-based refrigerating and heating device further comprises a cold and hot air collecting box, the rotating shaft and the refrigerating and heating mechanism are both located in the cold and hot air collecting box, and an air inlet and an air outlet are formed in the cold and hot air collecting box.
Preferably, a fan is arranged in the air inlet.
Preferably, the shape memory alloy-based refrigerating and heating device further comprises a tee shell arranged on the cold and hot air collecting box and communicated with the air outlet, the tee shell comprises a cold air port and a hot air port, and a sealing plate used for sealing the cold air port and the hot air port is arranged in the tee shell.
Preferably, wear to be equipped with the dwang in the tee bend shell, seal the board and be located the cold wind mouth with between the hot-blast mouth and its one side with the dwang is connected.
Preferably, be equipped with on the tee bend shell and be used for the drive dwang pivoted drive assembly, drive assembly include with the connecting plate that the dwang is connected, two relative settings are in the fixing base of connecting plate both sides and connection the connecting plate with the shape memory alloy silk between the fixing base.
Compared with the prior art, the technical scheme of the embodiment of the invention has the beneficial effects that:
when the rotating shaft of the refrigerating and heating device based on the shape memory alloy rotates in an accelerating mode, the pulling force provided by the shape memory alloy spring to the sliding block is smaller than the centrifugal force applied to the sliding block, the shape memory alloy spring gradually extends to the maximum value under the traction of the sliding block, and due to the thermal elastic effect (extending heat release and shortening heat absorption) of the shape memory alloy, the shape memory alloy spring extends to generate phase change heat release in the process so as to form hot air; the shape memory alloy-based refrigerating and heating device directly takes gas as a medium, does not need to exchange heat and cold through liquid, and improves the refrigerating efficiency; in addition, the rotating shaft, the supporting rod, the shape memory alloy spring and the sliding block are adopted, the structure is simple and compact, a plurality of pipelines and a plurality of valves are not required to be arranged, the weight and the size are reduced, and the occupied space is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a refrigerating and heating device based on shape memory alloy according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a refrigerating and heating device based on a shape memory alloy according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a refrigerating and heating device based on a shape memory alloy according to another embodiment of the present invention;
fig. 4 is an exploded view of the refrigerating and heating device based on shape memory alloy in fig. 3;
fig. 5 is a partial structural schematic diagram of the refrigerating and heating device based on the shape memory alloy in fig. 3.
Detailed Description
In the following, the embodiments of the present invention will be described in detail with reference to the drawings in the following, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a shape memory alloy-based refrigerating and heating device, and referring to fig. 1, the shape memory alloy-based refrigerating and heating device comprises a rotating shaft 100 and a refrigerating and heating mechanism 200 arranged on the rotating shaft 100, wherein the refrigerating and heating mechanism 200 comprises a supporting rod 210 arranged along the radial direction of the rotating shaft 100, a shape memory alloy spring 220 sleeved on the supporting rod 210 and a sliding block 230 in sliding fit with the supporting rod 210, the shape memory alloy spring 220 is positioned between the rotating shaft 100 and the sliding block 230, one end of the shape memory alloy spring 220 is fixedly arranged, and the other end of the shape memory alloy spring 220 is fixedly connected with the sliding block 230.
The shape memory alloy-based refrigerating and heating device of the embodiment utilizes the shape memory alloy as a core refrigerating and heating component to realize refrigerating and heating. Specifically, the shape memory alloy-based cooling and heating device mainly comprises a rotating shaft 100 and a cooling and heating mechanism 200, wherein the cooling and heating mechanism 200 comprises a supporting rod 210, a shape memory alloy spring 220 and a sliding block 230, wherein:
the rotating shaft 100 may be driven by a transmission assembly disposed between the rotating shaft and an output shaft of the motor to accelerate, decelerate, or rotate at a constant speed. The transmission component can be a gear, a transmission belt and the like, and is particularly arranged according to actual conditions. Of course, in order to realize the arrangement of the rotating shaft 100, a base may be correspondingly arranged, so that the rotating shaft 100 is mounted on the base through a bearing. Further, the supporting rod 210 of the cooling and heating mechanism 200 is fixed on the rotating shaft 100 and arranged along the radial direction of the rotating shaft 100, in this embodiment, the supporting rod 210 is a round rod, the supporting rod 210 is used for arranging the shape memory alloy spring 220 and the sliding block 230, and the shape memory alloy spring 220 and the sliding block 230 are correspondingly sleeved on the supporting rod 210. The shape memory alloy spring 220 is made of Shape Memory Alloy (SMA) material, and the applied spring structure form makes it have a certain elastic acting force. The shape memory alloy spring 220 is located between the rotating shaft 100 and the slider 230, and has one end fixedly disposed and the other end fixedly connected to the slider 230. The sliding block 230 is a cylindrical block with a certain mass, and it is easily understood that when the rotating shaft 100 rotates, the sliding block 230 slides on the supporting rod 210 due to the centrifugal force applied thereto, and the shape memory alloy spring 220 expands and contracts accordingly.
The working principle of the cooling and heating device of the embodiment is as follows: when the rotating shaft 100 rotates at an accelerated speed, the pulling force provided by the shape memory alloy spring 220 to the slider 230 is smaller than the centrifugal force applied to the slider 230, the shape memory alloy spring 220 gradually extends to the maximum under the traction of the slider 230, and accordingly, when the rotating shaft 100 rotates at a decelerated speed, the pulling force provided by the shape memory alloy spring 220 to the slider 230 is larger than the centrifugal force applied to the slider 230, the shape memory alloy spring 220 gradually shortens and recovers to the original length, the shape memory alloy spring 220 shortens and generates phase change heat absorption, and therefore cold air is formed, namely, the rotating shaft 100 rotates at an accelerated speed and the decelerated speed, so that the hot air and the cold air are continuously discharged.
The shape memory alloy-based refrigerating and heating device directly takes gas as a medium, does not need to exchange heat and cold through liquid, and improves the refrigerating efficiency; in addition, the rotating shaft 100, the supporting rod 210, the shape memory alloy spring 220 and the sliding block 230 are adopted, so that the structure is simple and compact, a plurality of pipelines and a plurality of valves are not required to be arranged, the weight and the volume are reduced, and the occupied space is reduced. In addition, compared with the traditional refrigeration system (compression type, absorption type and the like), the refrigeration and heating device does not use a refrigerant, has low energy consumption and low noise, does not generate greenhouse gases (such as carbon dioxide), is green and environment-friendly, and has stable and reliable operation.
In a preferred embodiment, referring to fig. 1, at least one set of cooling and heating mechanisms 200 is provided, and the set of cooling and heating mechanisms 200 includes a plurality of cooling and heating mechanisms 200 arranged along the circumferential direction of the rotating shaft 100. In this embodiment, the cooling and heating mechanisms 200 are divided into groups, each group of cooling and heating mechanisms 200 is composed of a plurality of cooling and heating mechanisms 200, and the plurality of cooling and heating mechanisms 200 are arranged along the circumferential direction of the rotating shaft 100. The plurality of refrigerating and heating mechanisms 200 in the set of refrigerating and heating mechanisms 200 are used for refrigerating and heating simultaneously, so that compared with a single refrigerating and heating mechanism 200, the refrigerating and heating efficiency is improved, and the refrigerating and heating effect is better. Specifically, when actually provided, the set of cooling and heating mechanisms 200 is composed of four cooling and heating mechanisms 200, and is arranged in a cross shape, which is merely exemplary and not limiting.
In a preferred embodiment, referring to fig. 1, the cooling and heating mechanisms 200 are provided in groups arranged along the axial direction of the rotating shaft 100. In this embodiment, the cooling and heating mechanisms 200 are provided in a plurality of groups, and the plurality of groups of cooling and heating mechanisms 200 are arranged along the axial direction of the rotating shaft 100. The plurality of groups of refrigerating and heating mechanisms 200 are arranged to simultaneously refrigerate and heat, so that compared with the single group of refrigerating and heating mechanisms 200, the refrigerating and heating efficiency is improved, and the refrigerating and heating effect is better. The number of cooling/heating means 200 is not limited herein, and may be set according to actual circumstances.
In a preferred embodiment, referring to fig. 2, the shape memory alloy-based cooling and heating apparatus further includes a fixed bushing 300 and an outer ring 400 disposed corresponding to a set of cooling and heating mechanisms 200;
the fixed shaft sleeve 300 is fixed on the rotating shaft 100, and two ends of the supporting rod 210 of the plurality of cooling and heating mechanisms 200 are respectively connected with the fixed shaft sleeve 300 and the outer ring 400.
In this embodiment, the number of the fixed shaft sleeves 300 and the outer ring 400 is determined according to the number of the refrigerating and heating mechanisms 200, the fixed shaft sleeves 300 are adapted to the rotating shaft 100 and can be fixed on the rotating shaft 100 by welding, key connection, and the like, and the radius of the outer ring 400 is consistent with the length of the support rod 210. The fixing shaft sleeve 300 is provided with a threaded hole corresponding to the support rod 210, one end of the support rod 210 is in threaded connection with the fixing shaft sleeve 300, and the other end of the support rod is in abutting connection with the inner ring surface of the outer ring 400. Under the combined action of the fixed shaft sleeve 300 and the outer ring 400, the support rods 210 of the plurality of cooling and heating mechanisms 200 are stably mounted on the rotating shaft 100 and stably rotate along with the rotating shaft 100. In addition, the outer ring 400 also has a limiting function on the sliding block 230, so as to prevent the sliding block 230 from sliding off the supporting rod 210.
In a preferred embodiment, referring to fig. 3 and 4, the shape memory alloy-based cooling and heating apparatus further includes a cold and hot air collecting box 500, the rotating shaft 100 and the cooling and heating mechanism 200 are both located in the cold and hot air collecting box 500, and the cold and hot air collecting box 500 is provided with an air inlet 510 and an air outlet 520. In this embodiment, the cold and hot air collecting box 500 is a cylindrical box, and two ends of the rotating shaft 100 may be correspondingly sleeved with bearings to be installed in the cold and hot air collecting box 500 through the bearings. Specifically, the normal temperature air is fed from the air inlet 510 of the cold and hot air collecting box 500, is combined with the cold air or hot air generated by the cooling and heating mechanism 200 to generate cold air or hot air correspondingly, and is then fed from the air outlet 520, so that the cold and hot air is collected and conveyed in a centralized manner, and the cooling and heating effects are improved. Preferably, the air inlet 510 and the air outlet 520 are disposed opposite to each other on the circumferential side of the hot and cold air collecting box 500, and correspond to the positions of both ends of the rotary shaft 100.
In a preferred embodiment, referring to fig. 3 and 4, the intake vent 510 has a fan 10 disposed therein. By the fan 10, the air inlet amount of the air inlet 510 can be adjusted to accelerate the generation and transportation of the cold and hot air in the cold and hot air collection box 500, thereby further improving the cooling and heating effects.
In a preferred embodiment, referring to fig. 3 to 5, the shape memory alloy-based cooling and heating device further includes a three-way housing 600 disposed on the cold and hot air collecting box 500 and communicating with the air outlet 520, the three-way housing includes a cold air outlet 610 and a hot air outlet 620, and the three-way housing 600 is provided with a sealing plate 20 for sealing the cold air outlet 610 and the hot air outlet 620. In this embodiment, the three-way shell 600 and the sealing plate 20 are used for separately conveying cold air and hot air in the cold and hot air collection box 500, and the shape and size of the sealing plate 20 are matched with the cold air port 610 and the hot air port 620, so it is easy to understand that when the air outlet 520 of the cold and hot air collection box 500 sends hot air, the sealing plate 20 in the three-way shell 600 correspondingly seals the cold air port 610, and the hot air entering the three-way shell 600 is conveyed from the hot air port 620; when the air outlet 520 of the cold and hot air collecting box 500 sends out cold air, the sealing plate 20 in the three-way shell 600 correspondingly seals the hot air port 620, and the cold air entering the three-way shell 600 is conveyed from the cold air port 610. The sealing plate 20 may be one or two separately arranged corresponding to the cold air port 610 and the hot air port 620, and is selected according to actual conditions. Further, the sealing operation of the sealing plate 20 may be manually performed or driven by a driving mechanism.
In a preferred embodiment, referring to fig. 5, a rotating rod 30 is inserted into the three-way housing 600, and the sealing plate 20 is located between the cold air port 610 and the hot air port 620 and one side of the sealing plate is connected to the rotating rod 30. In this embodiment, the two ends of the rotating rod 30 corresponding to the three-way shell 600 are respectively provided with the mounting holes, and the two ends of the rotating rod 30 are arranged in the mounting holes in a penetrating manner to realize the rotation on the three-way shell 600. Driven by the rotating rod 30, the sealing plate 20 can rotate to the cold air port 610 or the hot air port 620 to correspondingly seal the cold air port 610 or the hot air port 620. Further, the rotating rod 30 may adopt a motor as a power source and rotate under the transmission of a transmission assembly, the transmission assembly may be a gear assembly disposed between the rotating rod 30 and an output shaft of the motor, and the driving structure of the rotating rod 30 is provided, including but not limited thereto.
In a preferred embodiment, referring to fig. 5, a driving assembly 40 for driving the rotating rod 30 to rotate is disposed on the three-way housing 600, and the driving assembly 40 includes a connecting plate 41 connected to the rotating rod 30, two fixing bases 42 oppositely disposed on two sides of the connecting plate 41, and a shape memory alloy wire 43 connected between the connecting plate 41 and the fixing bases 42. In this embodiment, the connecting plate 41 is located at one end of the rotating rod 30 extending out of the three-way shell 600, the two fixing seats 42 are disposed on the shell wall of the three-way shell 600, the two fixing seats 42 are disposed at positions corresponding to the hot air port 620 and the cold air port 610, and are respectively connected with the connecting plate 41 in the middle to form a shape memory alloy wire 43. Based on the Shape Memory Effect (SME) of the shape memory alloy, it is easy to understand that, when the cold air port 610 or the hot air port 620 needs to be closed, the shape memory alloy wire 43 between the fixing base 42 and the connecting plate 41 corresponding to the air port is correspondingly electrified and heated, and the shape memory alloy wire 43 is shortened to pull the connecting plate 41 to rotate, so as to drive the rotating rod 30 to rotate, and the sealing plate 20 correspondingly seals the cold air port 610 or the hot air port 620. The driving assembly 40 of the present embodiment has a simple structure, is easy to control, and works stably and reliably.
The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes, which are made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The refrigerating and heating device based on the shape memory alloy is characterized by comprising a rotating shaft and a refrigerating and heating mechanism arranged on the rotating shaft, wherein the refrigerating and heating mechanism comprises a supporting rod arranged along the radial direction of the rotating shaft, a shape memory alloy spring sleeved on the supporting rod and a sliding block in sliding fit with the supporting rod, the shape memory alloy spring is positioned between the rotating shaft and the sliding block, one end of the shape memory alloy spring is fixedly arranged, and the other end of the shape memory alloy spring is fixedly connected with the sliding block.
2. The cooling and heating device based on shape memory alloy as claimed in claim 1, wherein at least one set of cooling and heating mechanisms is provided, and one set of cooling and heating mechanisms comprises a plurality of cooling and heating mechanisms arranged along the circumference of the rotating shaft.
3. The refrigerating and heating device based on shape memory alloy as claimed in claim 2, wherein said refrigerating and heating mechanism is a plurality of groups arranged along the axial direction of said rotating shaft.
4. The refrigerating and heating device based on shape memory alloy as claimed in claim 2 or 3, characterized by further comprising a fixed bushing and an outer ring arranged corresponding to a set of said refrigerating and heating mechanisms;
the fixed shaft sleeve is fixed on the rotating shaft, and two ends of the supporting rods of the plurality of refrigerating and heating mechanisms are respectively connected with the fixed shaft sleeve and the outer ring.
5. The refrigerating and heating device based on shape memory alloy as claimed in claims 1-4, further comprising a cold and hot air collecting box, wherein said rotating shaft and said refrigerating and heating mechanism are both located in said cold and hot air collecting box, and said cold and hot air collecting box is provided with an air inlet and an air outlet.
6. The refrigerating and heating device based on shape memory alloy as claimed in claim 5, characterized in that a fan is arranged in said air inlet.
7. The refrigerating and heating device based on the shape memory alloy as claimed in claim 5, further comprising a three-way shell disposed on the cold and hot air collecting box and communicated with the air outlet, wherein the three-way shell comprises a cold air outlet and a hot air outlet, and a sealing plate for sealing the cold air outlet and the hot air outlet is disposed in the three-way shell.
8. The refrigerating and heating device based on the shape memory alloy as claimed in claim 7, wherein a rotating rod is inserted into the three-way shell, the sealing plate is located between the cold air port and the hot air port, and one side of the sealing plate is connected with the rotating rod.
9. The refrigerating and heating device based on shape memory alloy as claimed in claim 8, wherein the three-way shell is provided with a driving component for driving the rotation rod to rotate, and the driving component comprises a connecting plate connected with the rotation rod, two fixing seats oppositely arranged at two sides of the connecting plate, and a shape memory alloy wire connected between the connecting plate and the fixing seats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397480.XA CN112944720A (en) | 2021-04-13 | 2021-04-13 | Shape memory alloy-based refrigerating and heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397480.XA CN112944720A (en) | 2021-04-13 | 2021-04-13 | Shape memory alloy-based refrigerating and heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944720A true CN112944720A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110397480.XA Pending CN112944720A (en) | 2021-04-13 | 2021-04-13 | Shape memory alloy-based refrigerating and heating device |
Country Status (1)
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|---|---|
| CN (1) | CN112944720A (en) |
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2021
- 2021-04-13 CN CN202110397480.XA patent/CN112944720A/en active Pending
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