CN114136047B - Refrigeration cycle device and heat exchange unit - Google Patents
Refrigeration cycle device and heat exchange unit Download PDFInfo
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- CN114136047B CN114136047B CN202111215053.1A CN202111215053A CN114136047B CN 114136047 B CN114136047 B CN 114136047B CN 202111215053 A CN202111215053 A CN 202111215053A CN 114136047 B CN114136047 B CN 114136047B
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
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- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a refrigeration circulating device and a heat exchange unit, which relate to the technical field of air conditioners and comprise a heat exchange unit, a guide element, a transmission device and a ventilation device, wherein the heat exchange unit consists of a transmission part, a thermoelastic element and a fixing component, the thermoelastic element is elastic shape memory alloy, the transmission part is used for changing the relative position between the fixing components so that the state of the thermoelastic element is changed between loosening and tensioning, and the transmission device is used for transmitting the received rotation power to the transmission part so that the transmission part and the guide element move relatively, so that the thermoelastic element is periodically changed between refrigeration and heat dissipation to achieve the purpose of adjusting the environmental temperature. The invention adopts the shape memory alloy as the medium to regulate the temperature, has simple structure, ingenious design and high heat exchange efficiency, and simultaneously solves the problem of environmental pollution in the traditional gas compression refrigeration technology.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a refrigeration cycle device and a heat exchange unit arranged in the refrigeration cycle device.
Background
Worldwide, the electricity consumed by refrigeration accounts for over 15% of the global electricity, and generates a great amount of carbon emissions each year, and the proportion is increasing with economic development and global warming. Furthermore, the most widely used vapor compression refrigeration technology today has reached, through centuries of development, carnot cycle theoretical efficiencies approaching 40-45%. However, most of the refrigerants used in vapor compression refrigeration are environmentally unfriendly, e.g., the best refrigerants are toxic (amino chemicals are still used in industrial production) or produce ozone depletion and greenhouse effects (freon and hydrofluorocarbon liquids). Many countries around the world have progressively legislated restrictions and banned these refrigerants. Therefore, there is now an urgent need to replace gas compression technology with a clean, environmentally friendly technology, especially after the new global climate agreement in paris. In light of this demand and background, solid state refrigeration technology has been proposed and rapidly developed. The key to solid state refrigeration technology is that when an external field is applied or changed, the solid state material exchanges heat with the outside world. The refrigerating effect is achieved by repeatedly superposing and collecting the endothermic effect. The solid elastic thermal refrigeration utilizes reversible martensite phase change of a stress-induced material, so that large entropy change is caused, and a remarkable refrigeration effect is finally obtained. Due to the characteristics of high efficiency, environmental protection, low cost and the like of the elastic heating refrigeration technology, a united states department of energy reported in 2014 defines the elastic heating refrigeration technology as the technology with the greatest development prospect in 17 future non-gas-liquid compression refrigeration technologies.
However, the design of modern pop-up refrigeration systems still presents more challenges. Chinese patent CN107289668B discloses a system for driving a memory alloy of a low-temperature refrigeration set, which is austenite at normal temperature and zero stress, to refrigerate to a low-temperature refrigeration space by absorbing heat from a low-grade heat source and discharging heat to a normal heat sink from a memory alloy of a high-temperature drive set, which is martensite at normal temperature and zero stress, and aims to solve the problem of driving force of an elastic thermal refrigeration system, but fails to solve the problem of low heat exchange efficiency caused by insufficient heat exchange. In order to evolve the elastic heating refrigeration technology from laboratory to industrial mass production, a refrigeration system with high heat exchange efficiency and high refrigeration density is urgently needed.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a refrigeration cycle apparatus and a heat exchange unit, which are used to solve the problem of low heat exchange efficiency of the existing elastic heating refrigeration system.
According to one aspect of the present application, there is provided a heat exchange unit, the thermoelastic element being a shape memory alloy member having elasticity;
a securing assembly including a first securing member and a second securing member, the securing assembly providing tension to the thermoelastic element such that the thermoelastic element is tensioned between the first securing member and the second securing member;
the transmission piece is used for being connected with the first fixing piece, and the first fixing piece can change the relative position of the first fixing piece and the second fixing piece in response to the action of the transmission piece, so that the state of the thermoelastic element is changed between relaxation and tension;
the thermoelastic element forms a barrier band between the first mount and the second mount for blocking gas flow.
Furthermore, the driving medium includes sliding base, slider, traction bearing and guide rail, sliding base one end is connected with first mounting and the other end is connected with traction bearing, sliding base fixes on the slider, the slider with guide rail sliding connection.
Furthermore, the thermoelastic element is a shape memory alloy wire which is wound on the first fixing piece and the second fixing piece to form an annular strip-shaped alloy piece.
Further, the annular strip-shaped alloy part is provided with two strip-shaped bodies between the first fixing piece and the second fixing piece, and the distance between the strip-shaped bodies is gradually increased along the direction from the first fixing piece to the second fixing piece.
Further, the driving medium includes sliding base, slider, traction bearing and guide rail, sliding base one end is connected with first mounting and the other end is connected with traction bearing, sliding base fixes on the slider, the slider with guide rail sliding connection.
According to another aspect of the present application, there is provided a refrigeration cycle apparatus using the heat exchange unit, the refrigeration cycle apparatus including a guide member, a radial sidewall of the guide member including a first diameter-changing section, a second diameter-changing section, and a second diameter-changing section in this order according to a difference in distance from a center axis of the guide member, a distance from the radial sidewall of the first diameter-changing section to the center axis of the guide member being constant, distances from the radial sidewalls of the first diameter-changing section and the second diameter-changing section to the center axis of the guide member gradually changing in a predetermined changing direction, and a changing direction of the distance from the first diameter-changing section to the center axis of the guide member being opposite to a changing direction of the distance from the second diameter-changing section to the center axis of the guide member in a same clock rotation direction in which the center axis of the guide member is a rotation axis;
a transmission for transmitting the received rotational power to the transmission for rotation of the transmission, the transmission having a degree of freedom of movement about a central axis of the guide element on a radial sidewall of the guide element;
the ventilation device is provided with a closed annular cavity for accommodating the thermoelastic element, and the annular cavity is coaxial with the central axis of the guide element;
the annular cavity is sequentially provided with a hot area inlet, a hot area outlet, a cold area inlet and a cold area outlet;
defining a region between the hot zone inlet and the hot zone outlet as a first ventilation cavity, the first ventilation cavity being located in correspondence with a first radius section of the guide element; defining a region between the hot zone outlet and the cold zone inlet as a first narrow air cavity, wherein the position of the first narrow air cavity corresponds to a first variable-diameter section of the guide element; defining an area between the cold zone inlet and the cold zone outlet as a second vent cavity, the second vent cavity being located in correspondence with the second radiused section of the guide element; defining a region between the cold zone outlet and the hot zone inlet as a second narrow air cavity corresponding to a second variable diameter section of the guide element;
the axial cavity size of the first ventilation cavity and the second ventilation cavity is larger than that of the first narrow air cavity and the second narrow air cavity; the arrangement of the barrier belt on the thermoelastic element is matched with the axial distance between the first narrow wind cavity and the second narrow wind cavity to form a barrier to the gas flow in the annular cavity at the position;
the air at one side of the hot area inlet and the hot area outlet enters from the cold area inlet, is cooled and then flows out from the cold area outlet.
Furthermore, the ventilation device comprises a first air duct and a second air duct, the first air duct covers the second air duct, and the hot area inlet, the hot area outlet, the cold area inlet and the cold area outlet are all arranged on the first air duct.
Furthermore, the first diameter-changing section and the first diameter-changing section are heat dissipation sections, the second diameter-changing section and the second diameter-changing section are refrigeration sections, and at least one refrigeration section and at least one heat dissipation section are alternately arranged on the guide element.
Further, the transmission device comprises a fixed base, a central shaft and a rotary bearing;
one end of the central shaft is connected with the fixed base, the other end of the central shaft is connected with a connecting plate, and the middle part of the central shaft is arranged in the inner ring of the rotary bearing;
the outer side of the connecting plate is connected with the first air duct, and the connecting plate covers the guide element and is fixedly connected with the guide element;
the outer ring of the rotary bearing is connected with a flange, and the outer edge of the flange is connected with a rotary base;
at least one heat exchange unit is arranged in the circumferential direction of the rotating base, a gear ring is connected to the outer side of the rotating base, and the gear ring is used for receiving rotating power to enable the rotating base to rotate.
Further, the heat exchange units are radially distributed around the central shaft in a circumferential manner.
Further, the rotating base is fixedly connected with the transmission part, the second air duct and the second fixing part from inside to outside in sequence, and the rotating base and the second air duct rotate in the same direction;
the second wind channel is equipped with one at least along radial direction's ventilation groove, first wind channel is lieing in first ventilation chamber with the second ventilation chamber region is equipped with one at least along radial ventilation groove.
Furthermore, the thermoelastic element is arranged on the groove edge of the ventilation groove of the second air duct.
Further, the rotating base is sequentially connected with the heat exchange unit, the second air channel and the second fixing piece from inside to outside, the second air channel is slidably connected with the rotating base, and the rotating base and the second air channel rotate relatively;
the second air duct and the first air duct are provided with at least one radial ventilation groove in the areas of the first ventilation cavity and the second ventilation cavity.
Furthermore, the ventilation grooves on the first air duct and the second air duct are alternately arranged.
Further, the thermoelastic element is in transition fit with the ventilation device in the areas of the first narrow wind cavity and the second narrow wind cavity.
Further, the direction of the wind flowing in the first ventilation chamber and the second ventilation chamber is opposite to the rotation direction of the rotating base, that is, the direction of the wind flowing from the hot zone inlet to the hot zone outlet is opposite to the rotation direction of the rotating base, and the direction of the wind flowing from the cold zone inlet to the cold zone outlet is opposite to the rotation direction of the rotating base.
Further, the guide element is composed of the first variable diameter section, the first constant diameter section, the second variable diameter section and the second constant diameter section through detachable connection.
According to the technical scheme, the technical scheme of the invention has the following beneficial effects:
the invention discloses a heat exchange unit using shape memory alloy, which uses the elastic thermal effect of a thermal elastic element made of the shape memory alloy, when the thermal elastic element is stretched by the action of a transmission member, the martensite is positively changed, namely, the martensite is changed from austenite to martensite, the heat is released and the temperature of the material is increased, so as to generate the heat dissipation effect, and when the thermal elastic element is changed from stretching to compression by the influence of the transmission member, the thermal elastic element absorbs the heat from the environment, so as to generate the refrigeration effect. The heat exchange unit is used for temperature control, so that the problem of environmental pollution existing in the traditional gas compression refrigeration technology can be solved, and the thermoelastic element in the heat exchange unit can be formed by winding a large number of shape memory alloy wires, so that the thermoelastic element is large in volume and high in refrigeration density, and the refrigeration efficiency is improved.
In addition, the invention discloses a refrigeration cycle device using the heat exchange unit, which comprises a transmission device, a guide element, a ventilation device and the heat exchange unit, wherein the transmission device is stressed to drive the heat exchange unit to do circular motion, and a transmission part on the heat exchange unit and the guide element do relative motion. The device has the advantages of simple structure, ingenious design and convenient use.
In addition, the distance between the first equal-diameter section and the second equal-diameter section on the guide element is longer, so that the thermoelastic element has sufficient time for heat exchange, and the heat exchange efficiency is improved.
Meanwhile, the axial distance between the blocking belt of the thermoelastic element and the first narrow air cavity and the axial distance between the blocking belt of the thermoelastic element and the second narrow air cavity in the annular cavity are matched to achieve the purpose of blocking air flow, so that air in the first ventilation cavity and the second ventilation cavity on two sides of the narrow air cavity cannot flow freely, the loss of refrigerating capacity is reduced, and the heat exchange efficiency is improved.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a sectional view 1 of a refrigeration cycle device in an embodiment of the invention;
FIG. 2 is a schematic structural view of a heat exchange unit in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a thermoelastic element and a fixing assembly according to an embodiment of the present invention;
FIG. 4 is a distribution diagram of a heat exchange unit in an embodiment of the present invention;
FIG. 5 is a schematic structural view of a guide member in an embodiment of the present invention;
fig. 6 is a sectional view 2 of a refrigeration cycle unit in an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a first air duct according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a first narrow wind chamber in an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a first ventilation lumen in an embodiment of the invention;
fig. 10 is a diagram showing the operation performance of the refrigeration cycle unit in the embodiment of the present invention.
In the figures, the reference symbols have the following meanings:
1. a thermoelastic element; 2. a first fixing member; 3. a second fixing member; 4. a traction bearing; 5. a slide base; 6. a slider; 7. a guide rail; 11. a guide member; 12. a first variable diameter section; 13. a first constant diameter section; 14. a second variable diameter section; 15. a second equal-diameter section; 21. a first air duct; 22. a hot zone outlet; 23. a hot zone inlet; 24. a cold zone outlet; 25. a cold zone inlet; 31. a fixed base; 32. a central shaft; 33. a rotating bearing; 34. a flange; 35. a connecting plate; 36. a ring gear; 37. rotating the base; 41. and a second air duct.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few 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 described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.
Based on the discovery of the solid-state refrigeration technology in the prior art, the key point is that when the form of the solid-state material is changed, the solid-state material exchanges heat with the outside. The effect of refrigeration is achieved by repeatedly superposing and collecting endothermic effect. Wherein, the solid-state elastic thermal refrigeration is reversible martensite phase transformation of a stress-induced material. However, in specific applications, there are some disadvantages, which result in lack of efficiency in temperature adjustment using a shape memory alloy, and embodiments of the present invention provide a refrigeration cycle apparatus having a simple structure and a smart design to greatly improve efficiency in heat exchange using a shape memory alloy.
The refrigeration cycle apparatus and the heat exchange unit according to the embodiment of the present invention will be described in further detail with reference to the embodiments shown in the drawings.
As shown in fig. 2 and 3, the heat exchange unit based on the shape memory alloy wire comprises a thermoelastic element 1, wherein the thermoelastic element 1 is a shape memory alloy part with elasticity; the fixing assembly comprises a first fixing piece 2 and a second fixing piece 3, the fixing assembly provides tension for the thermoelastic element 1 so that the thermoelastic element 1 is tensioned between the first fixing piece 2 and the second fixing piece 3, the first fixing piece 2 and the second fixing piece 3 are two mutually parallel grooved cylinders, and the diameter of the first fixing piece 2 is smaller than that of the second fixing piece 3; a transmission member for connecting with the first fixing member 2, the first fixing member 2 being capable of changing the relative positions of the first fixing member 2 and the second fixing member 3 in response to the action of the transmission member, so that the state of the thermoelastic element 1 changes between relaxed and tensioned states; the thermoelastic element 1 forms a barrier zone between the first mount 2 and the second mount 3 for blocking the gas flow.
The thermoelastic element 1 is a shape memory alloy wire wound into an annular strip-shaped alloy piece on the first fixing piece 2 and the second fixing piece 3, the annular strip-shaped alloy piece is equivalent to a plane after being straightened, and air cannot freely vertically pass through the plane. The invention is not limited to this configuration, and configurations that block air from passing perpendicularly through the plane of the thermoelastic element are within the scope of the present application, for example, shape memory alloy wires may be closely arranged between the fixed components and arranged in multiple layers to block gas flow, or shape memory alloy plates may be directly used instead of shape memory alloy wires.
As shown in fig. 2, the annular strip-shaped alloy member has two strips between the first fixing member 2 and the second fixing member 3, and the distance between the strips gradually increases from the first fixing member 2 to the second fixing member 3. When the heat exchange units are arranged in a circular shape as shown in fig. 4, the length of the strip-shaped body is longer when the diameter of the second fixing member 3 is larger than that of the first fixing member 2 than when the diameters of the two are the same, so that the contact area between the thermoelastic element 1 and the exchange gas is increased, and the heat exchange efficiency is improved.
The driving medium includes sliding base 5, slider 6, traction bearing 4 and guide rail 7, 5 one end of sliding base is connected with first mounting 2 and the other end is connected with traction bearing 4, sliding base 5 is fixed on slider 6, slider 6 with guide rail 7 sliding connection. The first fixed part 2 and the traction bearing 4 are fixed to a sliding base 5, which sliding base 5 is mounted on a slide 6, below which is a guide rail 7. The sliding base 5 can slide along the guide rail 7, when the sliding base 5 slides, the first fixing part 2 moves along with the sliding base, and the second fixing part 3 is fixed relative to the guide rail 7, so that when the first fixing part 2 moves, the distance between the first fixing part 2 and the second fixing part 3 can be increased or shortened, the thermoelastic element 1 can change between tension and relaxation, when the thermoelastic element 1 is tensioned, heat is released, when the thermoelastic element is relaxed, heat is absorbed, and the purpose of adjusting the temperature is achieved through reasonable application of the change.
The heat exchange unit is a basic unit constituting the refrigeration cycle apparatus in this embodiment, and as shown in fig. 6, in addition to the heat exchange unit, the refrigeration cycle apparatus in the embodiment of the present invention further includes a guide element 11, a transmission device, and a ventilation device, which are used to realize deformation of the thermo-elastic element in the heat exchange unit and temperature adjustment of the inlet and outlet air. The structure and function of these devices will now be described.
As shown in fig. 5, the radial sidewall of the guide element 11 includes a first variable diameter section 12, a first constant diameter section 13, a second variable diameter section 14 and a second constant diameter section 15 in sequence according to the distance from the central axis of the guide element 11, the distance from the radial sidewall of the first variable diameter section 13 and the distance from the radial sidewall of the second constant diameter section 15 to the central axis of the guide element 11 are kept constant, the distance from the radial sidewall of the first variable diameter section 12 and the distance from the radial sidewall of the second variable diameter section 14 to the central axis of the guide element 11 are gradually changed to a preset changing direction, and the changing direction of the distance from the first variable diameter section 12 to the central axis of the guide element 11 is opposite to the changing direction of the distance from the second variable diameter section 14 to the central axis of the guide element 11 in the same clock rotation direction with the central axis of the guide element 11 as a rotation axis.
As shown in fig. 4, the guide element 11 is in contact with a transmission of the heat exchange unit, said transmission having a freedom of movement on the radial side walls of said guide element 11 about the central axis of said guide element 11. Due to the different distances of the radial side walls of the guide element 11 from its central axis and the fact that the guide element 11 is arranged between the traction bearing 4 and the first fixed part 2, the sliding base 5 moves relative to the guide rail 7 under the action of the traction bearing 4 driven in motion by the guide element 11 when the traction bearing 4 slides on the guide element 11, so that the thermoelastic element 1 changes between slack and tension.
In some preferred embodiments, the guiding element 11 may be formed integrally, or may be formed by combining the first diameter-changing section 12, the first diameter-changing section 13, the second diameter-changing section 14 and the second diameter-changing section 15 through a detachable connection, when the guiding element 11 is formed by the detachable connection, it may be convenient to replace if some parts of the guiding element are damaged, and the purpose of adjusting the degree of tension and looseness of the thermoelastic element 1 may be achieved by replacing parts of the guiding element.
The thermoelastic element 1 is changed by the movement of a transmission member on the guide element 11, the power of which movement originates from an external rotational power and which is transmitted to said transmission member by means of a transmission device.
As shown in fig. 6, the transmission includes a fixed base 31, a center shaft 32, and a rotary bearing 33. The fixed base 31 is used as a fixed base 31 of the whole refrigeration cycle device, the fixed base 31 has a hole, and the central shaft 32 is fitted into the hole of the fixed base 31 and has one end placed in and fixed to the hole, that is, a state where one end of the central shaft 32 is connected to the fixed base 31 is formed. The other end of the central shaft 32 is exposed out of the hole and the other end is connected with a connecting plate 35. The connecting plate 35 is fixedly connected to the guide element 11, and the guide element 11 is arranged coaxially with the central shaft 32. In order to fix the guiding element 11 to the connecting plate 35, the guiding element 11 in this embodiment is T-shaped, and the T-shaped structure includes a transverse plate and a vertical plate which are vertically arranged, the transverse plate is connected to the connecting plate 35, and the vertical plate is in contact with the traction bearing 4. This achieves that the connecting plate 35, the guide element 11 are fixed relative to the fixed base 31.
The middle part of the central shaft 32 is arranged in the inner ring of the rotary bearing 33, the outer ring of the rotary bearing 33 is connected with a flange 34, and the outer edge of the flange 34 is connected with a rotary base 37. At least one heat exchange unit is arranged on the circumference of the rotary base 37, the rotary base 37 is fixedly connected with a guide rail of the heat exchange unit, a gear ring 36 is connected to the outer side of the rotary base 37, and the gear ring 36 is used for receiving rotation power to enable the rotary base 37 to rotate. When the ring gear 36 is rotated by external power, the flange 34, the spin base 37 and the heat exchange unit are rotated by the ring gear 36. Thus, by means of the above-mentioned transmission means, a relative movement between the heat exchange unit fixed to the rotating base 37 and the guide element 11 fixed relative to the fixed base 31 is enabled.
The transmission device transmits power to the transmission part, the heat exchange unit and the guide element 11 move relatively, the thermoelastic element 1 changes between heat dissipation and refrigeration, and the ventilation device introduces gas to exchange heat with the thermoelastic element 1.
The ventilation device has a closed annular chamber for accommodating the thermoelastic element 1, said annular chamber being coaxial with the central axis 32 of the guide element 11. The annular cavity is sequentially provided with a hot area inlet 23, a hot area outlet 22, a cold area inlet 25 and a cold area outlet 24. As shown in fig. 6 and 7, the ventilation device in the embodiment of the present invention includes a first air duct 21 and a second air duct 41, the first air duct 21 covers the second air duct 41, the thermoelastic element 1 is disposed between the first air duct 21 and the second air duct 41, and the hot-zone inlet 23, the hot-zone outlet 22, the cold-zone inlet 25, and the cold-zone outlet 24 are all disposed on the first air duct 21. Defining the area between the hot zone inlet 23 and the hot zone outlet 22 as a first ventilation cavity, the position of the first ventilation cavity corresponding to the first equal-diameter section 13 of the guide element 11; defining the area between the hot zone outlet 22 and the cold zone inlet 25 as a first narrow air cavity, the position of which corresponds to the first variable-diameter section 12 of the guide element 11; defining the area between the cold zone inlet 25 and the cold zone outlet 24 as a second vent chamber, the location of which corresponds to the second equal-diameter section 15 of the guide element 11; the area between the cold zone outlet 24 and the hot zone inlet 23 is defined as a second narrow air chamber, which corresponds to the second variable diameter section 14 of the guiding element 11. The hot zone inlet 23 and the air at one side of the hot zone outlet 22 are introduced from the hot zone inlet 23, and flow out from the hot zone outlet 22 after the first ventilation cavity exchanges heat with the thermoelastic element 1. And after entering from the cold area inlet 25, the air on one side of the cold area inlet 25 and one side of the cold area outlet 24 exchanges heat with the thermal elastic element 1 in the second ventilation cavity, and then flows out from the cold area outlet 24. Therefore, the gas is continuously heat-exchanged with the thermoelastic element 1 by the arrangement of the ventilation device.
The refrigeration cycle device of the embodiment of the invention achieves the purpose of adjusting the temperature through the heat exchange unit, the guide element 11, the transmission device and the ventilation device. As shown in fig. 4 and 9, the heat exchange units are evenly distributed around the central shaft 32 on the rotating base 37. The external power drives the ring gear 36 to rotate, and the flange 34, the rotating base 37 and the heat exchange unit are rotated by the ring gear 36. When the guide element 11 and the heat exchange unit are rotated relatively, the thermo-elastic element 1 changes between tension and relaxation. When the thermoelastic element 1 is in the first diameter-changing section 12, the traction bearing 4 is stressed to make the sliding base 5 slide along the guide rail 7, the first fixing piece 2 is fixed on the sliding base 5, therefore, the distance between the first fixing piece 2 and the second fixing piece 3 is increased along with the movement of the sliding base 5, so that the thermoelastic element 1 is gradually changed into tension from relaxation and keeps tension in the first diameter-changing section 13 for heat release, and the hot zone inlet 23 and the hot zone outlet 22 side wind are introduced from the hot zone inlet 23, and flow out from the hot zone outlet 22 after the first ventilation cavity is heated. When the thermoelastic element 1 is in the second reducer section 14, it changes from tension to relaxation and maintains the relaxation in the second reducer section 15 for refrigeration, and after entering from the cold area inlet 25 and the air at one side of the cold area outlet 24, the air flows out from the cold area outlet 24 after refrigeration in the second ventilation cavity.
In order to make the gas and the thermoelastic element 1 perform sufficient heat exchange in the first ventilation cavity and the second ventilation cavity, as shown in fig. 1, 8 and 9, in the embodiment of the present invention, the second air duct 41 is provided with ventilation slots along the radial direction, the first air duct 21 is provided with ventilation slots along the radial direction in the areas of the first ventilation cavity and the second ventilation cavity, the thermoelastic element 1 is arranged on the slot edge of the ventilation slot of the second air duct 41, and multiple sets of ventilation slots are arranged in the first air duct 21 and the second air duct 41 in a circumferential radial distribution manner. The rotating base 37 is fixedly connected with the transmission piece, the second air duct 41 and the second fixing piece 3 from inside to outside in sequence, and the rotating base 37 and the second air duct 41 rotate in the same direction. Therefore, when wind enters the annular cavity, along with the rotation of the second air duct 41, the ventilation grooves between the first air duct 21 and the second air duct 41 form an S-shaped ventilation duct, and when air flows in the S-shaped ventilation duct, the air and the thermoelastic element 1 perform more sufficient heat exchange, so that the heat exchange efficiency is improved. Meanwhile, as the thermoelastic element 1 is arranged on the groove edge of the ventilation groove of the second air duct 41, the thermoelastic element 1 on the groove edge of the ventilation groove of the first narrow air cavity and the second narrow air cavity area can block air from flowing in the first ventilation cavity and the second ventilation cavity.
As a preferred embodiment, in order to further improve the heat exchange efficiency, the rotating base 37 is connected to the heat exchange unit, the second air duct 41, and the second fixing member 3 in sequence from inside to outside, the second air duct 41 is slidably connected to the rotating base 37, and the rotating base 37 and the second air duct 41 rotate relatively. The second air duct 41 and the first air duct 21 are provided with at least one radial ventilation slot in the area of the first ventilation cavity and the second ventilation cavity. The ventilation grooves on the first air channel 21 and the second air channel 41 are alternately arranged to form an S-shaped air channel, and on the basis that the barrier belt of the thermoelastic element 1 blocks the air flow of the first narrow air cavity and the second narrow air cavity, the second air channel is fixed when the heat exchange unit and the rotating base 37 rotate, so that the air in the ventilation grooves of the second air channel 41 cannot diffuse between the first ventilation cavity and the second ventilation cavity along with the rotation, the loss of refrigerating capacity is further reduced, and the heat exchange efficiency is improved.
The direction of the wind flow needs to be controlled during the operation of the refrigeration cycle apparatus, and the direction in which the wind flows in the first and second ventilation chambers in the embodiment of the present invention is opposite to the rotation direction of the rotating base 37 in order to obtain more entropy increase during the heat exchange. As shown in fig. 10, during operation of the refrigeration system, ambient outdoor air is blown into the hot zone inlet 23, where the temperature of the thermo-elastic element 1 is high, and then air is passed through the first ventilation chamber, where the heated air is blown out from the hot zone outlet 22 to the outdoor atmosphere, where the temperature of the thermo-elastic element 1 is highest. The air is S-shaped and bent to circulate and advance in the process of passing through the first ventilation cavity, and the temperature difference between the air and the thermoelastic element 1 is relatively stable, so that relatively sufficient heat exchange is performed. The air in the room is blown into the cold zone inlet 25, where the temperature of the thermoelastic element 1 is lower, and then the air circulates through the whole second ventilation chamber, and the air cooled by the heat absorption is blown back into the room from the cold zone outlet 24, where the temperature of the thermoelastic element 1 is lowest. The air is bent in an S shape and circulates forwards in the process of passing through the second ventilation cavity, the temperature difference between the air and the thermoelastic element 1 is relatively stable, sufficient heat exchange is carried out, and repeated cooling of the air entering the refrigeration cycle device is achieved. Namely, indoor air enters the second ventilation cavity, is absorbed by the thermal elastic element 1 with low temperature and takes away heat, and the cooled air is discharged back to the room; the taken heat is released into the air blown in from the outside in the first ventilation chamber, and then the heated air is discharged back to the outside.
Since the actual environments of the refrigeration cycle devices are different, it may be necessary for one refrigeration cycle device to simultaneously control the temperatures of a plurality of regions, and the control of the plurality of regions can be achieved by the following improvement. The first variable diameter section 12 and the first constant diameter section 13 are heat dissipation sections, the second variable diameter section 14 and the second constant diameter section 15 are refrigeration sections, at least one refrigeration section and at least one heat dissipation section can be alternately arranged on the guide element 11, and corresponding air inlet and air outlet openings are arranged on the ventilation device. Therefore, the refrigeration section and the heat dissipation section are arranged and corresponding air inlets and air outlets are arranged according to actual conditions, so that the temperature of a plurality of spaces can be adjusted in one period.
The working process of the refrigeration cycle device comprises the following steps: the gear ring 36 receives power to enable the rotating base 37 to rotate, the transmission piece connected with the rotating base 37, the second air channel 41 and the second fixing piece 3 rotate together with the transmission piece, the traction bearing 4 on the transmission piece and the guide element 11 rotate relatively, the traction bearing 4 drives the first fixing piece 2 to move due to different radial distances of the guide element 11, the thermal elastic element 1 changes between tension and relaxation, when the thermal elastic element 1 rotates in the first ventilation cavity, the thermal elastic element is in a tension state, air flows into the thermal area inlet 23 and exchanges heat with the thermal elastic element 1 through the S-shaped air channel, and then flows out of the thermal area outlet 22 to take away heat, and the heat dissipation process is completed. When the thermoelastic element 1 rotates to the first narrow wind cavity, the blocking band formed by the thermoelastic element 1 blocks the air from flowing in the annular cavity. When the thermoelastic element 1 rotates in the second ventilation cavity, the thermoelastic element 1 is in a relaxed state, air flows in from the cold area inlet 25 and exchanges heat with the thermoelastic element 1 through the S-shaped air channel, then flows out from the cold area outlet 24 to take away heat to complete a refrigeration process, and when the thermoelastic element 1 rotates to the second narrow air cavity, a blocking belt formed by the thermoelastic element 1 blocks air from flowing in the annular cavity. The temperature is adjusted by the circulation.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be defined by the appended claims.
Claims (15)
1. A refrigeration cycle apparatus, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the heat exchange unit comprises a thermoelastic element, and the thermoelastic element is a shape memory alloy piece with elasticity; a securing assembly including a first securing member and a second securing member, the securing assembly providing tension to the thermoelastic element such that the thermoelastic element is tensioned between the first securing member and the second securing member; the transmission piece is used for being connected with the first fixing piece, and the first fixing piece can change the relative position of the first fixing piece and the second fixing piece in response to the action of the transmission piece, so that the state of the thermoelastic element is changed between relaxation and tension; the thermoelastic element forming a barrier band between the first mount and the second mount for blocking gas flow;
the radial side wall of the guide element sequentially comprises a first variable diameter section, a first equal diameter section, a second variable diameter section and a second equal diameter section according to different distances from the radial side wall of the guide element to a central shaft of the guide element, the distances from the radial side walls of the first and second equal diameter sections to the central shaft of the guide element are kept unchanged, the distances from the radial side walls of the first and second variable diameter sections to the central shaft of the guide element are gradually changed to a preset change direction, and in the same clock rotation direction taking the central shaft of the guide element as a rotating shaft, the change direction of the distance from the first variable diameter section to the central shaft of the guide element is opposite to the change direction of the distance from the second variable diameter section to the central shaft of the guide element;
a transmission for transmitting the received rotational power to the transmission for rotation of the transmission, the transmission having a degree of freedom of movement about a central axis of the guide element on a radial sidewall of the guide element;
the ventilation device is provided with a closed annular cavity for accommodating the thermoelastic element, and the annular cavity is coaxial with the central axis of the guide element;
the annular cavity is sequentially provided with a hot area inlet, a hot area outlet, a cold area inlet and a cold area outlet;
defining a region between the hot zone inlet and the hot zone outlet as a first ventilation cavity, the first ventilation cavity being located in correspondence with a first radius section of the guide element; defining a region between the hot zone outlet and the cold zone inlet as a first narrow air cavity, wherein the position of the first narrow air cavity corresponds to a first variable-diameter section of the guide element; defining an area between the cold area inlet and the cold area outlet as a second vent cavity, wherein the position of the second vent cavity corresponds to a second equal-diameter section of the guide element; defining a region between the cold zone outlet and the hot zone inlet as a second narrow air cavity corresponding to a second variable diameter section of the guide element;
the axial cavity size of the first ventilation cavity and the second ventilation cavity is larger than that of the first narrow air cavity and the second narrow air cavity; the arrangement of the blocking belt on the thermoelastic element is matched with the axial distance between the first narrow wind cavity and the second narrow wind cavity to form blocking to the gas flow in the annular cavity body at the position;
the air at one side of the hot area inlet and the hot area outlet enters from the cold area inlet, is cooled and then flows out from the cold area outlet.
2. The refrigeration cycle apparatus according to claim 1, wherein: the thermoelastic element is a shape memory alloy wire which is wound on the first fixing piece and the second fixing piece to form an annular strip-shaped alloy piece.
3. The refrigeration cycle apparatus according to claim 2, wherein: the annular strip-shaped alloy part is provided with two strip-shaped bodies between the first fixing piece and the second fixing piece, and the distance between the strip-shaped bodies is gradually increased from the first fixing piece to the direction pointing to the second fixing piece.
4. The refrigeration cycle apparatus of any of claims 2~3, wherein: the driving medium includes sliding base, slider, traction bearing and guide rail, sliding base one end is connected with first mounting and the other end is connected with traction bearing, sliding base fixes on the slider, the slider with guide rail sliding connection.
5. The refrigeration cycle apparatus according to claim 1, wherein: the ventilation device comprises a first air duct and a second air duct, the first air duct covers the second air duct, and the hot area inlet, the hot area outlet, the cold area inlet and the cold area outlet are all arranged on the first air duct.
6. The refrigeration cycle apparatus according to claim 5, wherein: the first reducing section and the first constant diameter section are heat dissipation sections, the second reducing section and the second constant diameter section are refrigeration sections, and at least one refrigeration section and at least one heat dissipation section are alternately arranged on the guide element.
7. The refrigeration cycle apparatus according to claim 5 or 6, characterized in that: the transmission device comprises a fixed base, a central shaft and a rotary bearing;
one end of the central shaft is connected with the fixed base, the other end of the central shaft is connected with a connecting plate, and the middle part of the central shaft is arranged in the inner ring of the rotary bearing;
the outer side of the connecting plate is connected with the first air duct, and the connecting plate covers the guide element and is fixedly connected with the guide element;
the outer ring of the rotary bearing is connected with a flange, and the outer edge of the flange is connected with a rotary base;
at least one heat exchange unit is arranged in the circumferential direction of the rotating base, a gear ring is connected to the outer side of the rotating base, and the gear ring is used for receiving rotating power to enable the rotating base to rotate.
8. The refrigeration cycle apparatus according to claim 7, wherein: the heat exchange units are circumferentially and radially distributed around the central shaft.
9. The refrigeration cycle apparatus according to claim 8, wherein: the rotating base is fixedly connected with the transmission part, the second air duct and the second fixing part from inside to outside in sequence, and the rotating base and the second air duct rotate in the same direction;
the second wind channel is at least provided with a ventilation groove along the radial direction, and the first wind channel is at least provided with a ventilation groove along the radial direction in the areas of the first ventilation cavity and the second ventilation cavity.
10. The refrigeration cycle apparatus according to claim 9, wherein: and the thermoelastic element is arranged on the groove edge of the ventilation groove of the second air duct.
11. The refrigeration cycle apparatus according to claim 8, wherein: the rotating base is sequentially connected with the heat exchange unit, the second air channel and the second fixing piece from inside to outside, the second air channel is connected with the rotating base in a sliding mode, and the rotating base and the second air channel rotate relatively;
the second air duct and the first air duct are provided with at least one radial ventilation groove in the areas of the first ventilation cavity and the second ventilation cavity.
12. The refrigeration cycle apparatus according to claim 11, wherein: the ventilation grooves on the first air channel and the second air channel are alternately arranged.
13. A refrigeration cycle apparatus according to any one of claims 5, 6, 9, 10, 11, or 12, wherein: the thermoelastic element is in transition fit with the ventilation device in the region of the first narrow wind cavity and the second narrow wind cavity.
14. A refrigeration cycle apparatus according to any one of claims 8, 9, 10, 11, or 12, wherein: the thermoelastic element is in transition fit with the ventilation device in the areas of the first narrow air cavity and the second narrow air cavity; the direction in which the wind flows in the first and second ventilation chambers is opposite to the rotation direction of the spin base.
15. The refrigeration cycle apparatus according to claim 14, wherein: the guide element is composed of the first variable diameter section, the first constant diameter section, the second variable diameter section and the second constant diameter section through detachable connection.
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| CN108562061B (en) * | 2018-06-08 | 2024-03-08 | 北京科技大学 | Piston-hydraulic cylinder refrigerating device based on memory alloy thermoelastic effect |
| CN111141060B (en) * | 2020-01-16 | 2023-11-28 | 天津商业大学 | Refrigeration method and refrigeration system based on elastic heating effect |
| CN111854222B (en) * | 2020-07-20 | 2021-07-13 | 西安交通大学 | Elastic heating refrigerating system and refrigerating method thereof |
| CN113115559B (en) * | 2021-03-11 | 2022-04-22 | 西安交通大学 | Heat dissipation device and heat dissipation method based on shape memory alloy |
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