CN217632711U - Infusion core, heat exchange mechanism and Stirling generator - Google Patents

Abstract

The utility model relates to the technical field of power generation, and provides an infusion core, a heat exchange mechanism and a Stirling generator. The infusion core comprises at least two infusion tubes and a wire mesh. The infusion tube has an inner cavity for liquid to flow, and the infusion tube is provided with There are a plurality of through holes communicating with the inner cavity, and the side walls between the adjacent infusion tubes abut each other; the wire mesh is wrapped around the outside of the infusion tube, and the inner wall of the wire mesh is attached to the outer wall of the infusion tube, and A flow channel for liquid circulation is formed between the infusion pipe and the infusion pipe, wherein the infusion pipe is respectively connected with the heat source and the heat exchanger to exchange heat between the heat exchanger and the heat source. In the above way, after the wire mesh is wrapped around the two infusion tubes, the area that is attached to the outer wall of the heat exchanger and the outer wall of the heat source is larger, the infusion effect is better, and a better heat exchange effect can be achieved. This can accommodate higher power Stirling generators.

Description

Infusion core, heat exchange mechanism and Stirling generator

technical field

The utility model relates to the technical field of power generation, in particular to a liquid infusion core, a heat exchange mechanism and a Stirling generator.

Background technique

The free piston Stirling generator has the advantages of high efficiency, reliability and environmental protection. The Stirling generator includes a water cooler, a regenerator, a high temperature heat exchanger, and an ejector piston. Among them, the high temperature heat exchanger is the key to the system. The components need to exchange high-temperature heat with the outside world. Generally, the heat source cannot directly exchange heat with the high-temperature heat exchanger, but adopts the method of infusion core.

Generally, the condensation section of the infusion core can be inserted into the red copper block, and the red copper is welded on the outer surface of the high-temperature heat exchanger, that is, the heat exchange with the infusion core is realized by using the heat conduction of the red copper, but this form can only be applied to the low-power stainless steel. For the Turling engine, after the power increases, the heat conduction temperature difference on the copper will rise sharply, and the mass is large and becomes very bulky.

Utility model content

The embodiment of the present utility model provides a liquid infusion core, a heat exchange mechanism and a Stirling generator, which are used to solve the problem that the heat exchange coupling structure of the liquid infusion core and the high temperature heat exchanger in the prior art cannot meet the requirements of the high-power Stirling generator. Technical issues with thermal requirements.

In a first aspect, an embodiment of the present invention provides an infusion core, comprising:

At least two infusion tubes, the infusion tubes have an inner cavity for liquid to flow, a plurality of through holes communicating with the inner cavity are opened on the infusion tubes, and the side walls between the adjacent infusion tubes abut each other;

A wire mesh is wrapped around the outside of the infusion tube, and the inner wall of the wire mesh is attached to the outer wall of the infusion tube, and a flow channel for liquid circulation is formed between the wire mesh and the infusion tube; wherein,

The infusion pipes are respectively connected with a heat source and a heat exchanger, so as to exchange heat between the heat exchanger and the heat source.

According to the infusion core of an embodiment of the present invention, the end of the wire mesh is attached to the evaporation surface of the heat source or inserted into the heat pipe of the heat source.

According to the infusion core of an embodiment of the present invention, the conducting holes are sequentially spaced and spirally arranged along the axial direction of the infusion tube.

According to the infusion core of an embodiment of the present invention, the surface of the wire mesh includes arc surfaces at both ends and a fitting plane in the middle, and the fitting plane is fitted with the outer wall surface of the heat exchanger.

According to the infusion core of an embodiment of the present invention, the flow channel includes a circulation gap formed on the outside of the infusion tube and the inside of the wire mesh and the inner cavity, and the liquid working medium is transported along the flow channel.

According to the infusion core of an embodiment of the present invention, both ends of the infusion tube are provided with seals.

In a second aspect, an embodiment of the present invention provides a heat exchange mechanism, comprising: a heat exchanger;

an outer shell, which is wrapped around the outside of the heat exchanger, and a plurality of heat sources are connected in the outer shell;

At least one of the above-mentioned infusion cores, the infusion cores are respectively connected with the heat source and the heat exchanger.

According to the heat exchange mechanism of an embodiment of the present invention, the number of the infusion cores is at least two, and the adjacent infusion cores are arranged at intervals along the axial direction of the heat exchanger.

According to the heat exchange mechanism of an embodiment of the present invention, the outer wall of the heat exchanger is provided with a first porous liquid-absorbing core, the outer wall of the heat source is provided with a second porous liquid-absorbing core, and the heat exchange Liquid working medium is stored in the outer wall surface of the device, the outer wall surface of the heat source and the infusion core.

The embodiment of the present invention also provides a Stirling generator, comprising: a water cooler, a regenerator and the above-mentioned heat exchange mechanism connected in sequence.

The infusion core provided by the embodiment of the present invention includes at least two infusion tubes, and after the wire mesh is wrapped around the two infusion tubes, the area that is attached to the outer wall surface of the heat exchanger and the outer wall surface of the heat source is larger, and the infusion effect is improved. Better, and can achieve better heat exchange effect, which can adapt to higher power Stirling generators.

Further, the heat exchange mechanism provided by the embodiment of the present invention includes the above-mentioned infusion core, thereby having the beneficial effect of the infusion core, which will not be repeated here.

Further, the Stirling generator provided by the embodiment of the present utility model includes the above-mentioned heat exchange mechanism, and the heat exchange mechanism includes an infusion core. Therefore, the Stirling generator also has all the beneficial effects of the infusion core, which is omitted here. Repeat.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative work.

Fig. 1 is the structural representation of the Stirling generator of the utility model embodiment;

Fig. 2 is the sectional view at the A-A place shown in Fig. 1;

3 is a schematic structural diagram of an infusion tube according to an embodiment of the present invention;

4 is a cross-sectional view of an infusion core according to an embodiment of the present invention;

5 is another schematic structural diagram of the Stirling generator according to the embodiment of the present invention;

Fig. 6 is the sectional view at the B-B place shown in Fig. 5;

Reference number:

10, infusion tube; 110, lumen; 120, through hole;

20, wire mesh; 210, flow channel; 220, arc surface; 230, fit plane; 240, circulation gap;

30, heat exchange mechanism; 310, heat source; 3110, second porous wick; 320, heat exchanger; 3210, first porous wick; 330, infusion core; 340, shell; 3410, cavity;

40, Stirling generator; 410, water cooler; 420, regenerator; 430, piston; 440, excluder.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "horizontal", "top", "bottom", "front", "rear", "left", "right" "," "vertical", "horizontal", "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description The embodiments and simplified descriptions of the present invention do not indicate or imply that the devices or elements referred to must have specific orientations, are constructed and operate in specific orientations, and therefore should not be construed as limitations to the embodiments of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood in specific situations.

1 to 6, an embodiment of the present utility model proposes to protect a Stirling generator 40, including a water cooler 410, a regenerator 420, a heat exchange mechanism 30, and other components such as an ejector 440 and a piston 430. , which will not be repeated here.

As for the heat exchange mechanism 30 including the heat exchanger 320, the casing 340 and the infusion core 330, it should be noted that the water cooler 410 is kept at a lower temperature, and the heat exchange between the heat exchanger 320 and the heat source 310 is kept at a higher temperature temperature, so that an axial temperature gradient is formed in the regenerator 420 between the heat exchanger 320 and the water cooler 410. When the temperature gradient reaches a certain value, spontaneous formation can be formed inside the Stirling generator 40 after excitation. The sound wave oscillates, converts thermal energy into mechanical energy, and thus pushes the piston 430 to reciprocate for power generation. The Stirling generator 40 can be an opposed Stirling generator, which can counteract the vibration generated by the moving parts.

The casing 340 encloses the heat exchanger 320 of the Stirling generator 40 and forms a closed cavity 3410 to prevent the heat source 310 from contacting the outside and affecting the heat exchange effect between the heat source 310 and the heat exchanger 320 .

Specifically, a plurality of heat sources 310 are connected in the casing 340 , the transfusion core 330 is wrapped around the outer wall of the heat exchanger 320 and both ends are connected to the heat sources 310 . For the heat sources 310 , the embodiment of the present invention takes six heat sources 310 as an example to describe, but it is not limited thereto. The six heat sources 310 correspond to three infusion cores 330 , and two heat sources 310 are respectively connected to both ends of each infusion core 330 .

For the heat exchanger 320, the outer wall of the heat exchanger 320 is provided with a first porous liquid wick 3210, the outer wall of the heat source 310 is provided with a second porous liquid wick 3110, the outer wall of the heat exchanger 320, the heat source 310 Liquid working medium is stored in the outer wall surface of the infusion core 330 and in the infusion core 330 . The outer wall surface of the heat exchanger 320 is the condensation wall surface, and the outer wall surface of the heat source 310 is the evaporation surface. Specifically, the first porous liquid-absorbent core 3210 and the second porous liquid-absorbent core 3110 are provided in laminated wire mesh, stacked pellets or porous structures.

Referring to FIGS. 3 to 5 , in some embodiments of the present invention, the infusion core 330 includes at least two infusion tubes 10 and a wire mesh 20 , the infusion tubes 10 have an inner cavity 110 for liquid to flow, and the infusion tubes 10 There are a plurality of through holes 120 communicating with the inner cavity 110 , and the side walls of the adjacent infusion tubes 10 abut against each other. The wire mesh 20 is wrapped around the outside of the infusion tube 10, and the inner wall of the wire mesh 20 is attached to the outer wall of the infusion tube 10, and a flow channel 210 for liquid circulation is formed between the wire mesh 20 and the infusion tube 10; wherein, the infusion tube 10 is respectively connected to a heat source 310 and the heat exchanger 320 to exchange heat between the heat exchanger 320 and the heat source 310 .

Because the infusion core 330 in the embodiment of the present application includes at least two infusion tubes 10 , the hydraulic diameter of the liquid flow channel 210 is larger, and the resistance of the liquid flow is greatly reduced, so the conveying volume of the liquid is greatly increased. It has a significant effect on the heat transfer ability of heat pipes, especially in the state of weightlessness. Further, the thickness of the first porous absorbent core 3210 and the second porous absorbent core 3110 may be smaller than the thickness of the wire mesh 20 . This can effectively reduce the effect of steam flow on liquid transport.

For the infusion tube 10 , the through holes 120 are sequentially spaced and spirally arranged along the axial direction of the infusion tube 10 . The arrangement of the through hole 120 facilitates the rapid flow of the liquid working medium along the via hole, thereby improving the heat exchange efficiency.

It should be noted that the end of the wire mesh 20 is attached to the evaporation surface of the heat source 310 . For details, please refer to FIG. 2 . In FIG. 2 , the end of the wire mesh 20 is attached to the evaporation surface of the heat source 310 . The wire mesh 20 has a certain resistance and capillary force, which can prevent the liquid from leaving the infusion core 330 and provide a driving force for the flow of the liquid. The wire mesh 20 can be made by sintering, so as to avoid looseness between the wire mesh 20 and the infusion tube 10 .

Please refer to FIG. 4 , further, the surface of the wire mesh 20 includes arc surfaces 220 at both ends and a bonding plane 230 in the middle. The bonding plane 230 is in contact with the outer wall surface of the heat exchanger 320 and the outer wall surface of the heat source 310, which can improve the heat transfer efficiency.

Specifically, in some embodiments of the present invention, the number of infusion tubes 10 is two, the side walls of the two infusion tubes 10 are in contact with each other, and the wire mesh 20 is wound on the surface of the wire mesh 20 after the outer wall surface of the infusion tube 10 It includes the arc surfaces 220 at both ends and a bonding plane 230 between the arc surfaces 220 . The bonding plane 230 is used to be attached to the outer wall of the heat exchanger 320 , and the bonding plane 230 is used to improve the connection between the heat exchanger 320 and the heat exchanger 320 . The bonding area between the outer walls can make the infusion pipe 10 transport the heat exchange medium to the outer wall of the heat exchanger 320, the contact area between the heat exchange medium and the outer wall of the heat exchanger 320 is larger, thereby improving the heat exchange. efficiency.

For the infusion core 330, the infusion core 330 may be U-shaped, with two protruding parts and a bent part between the protruding parts, and the protruding part is inserted into the heat pipe of the heat source 310 or attached to the outside of the heat source 310 The wall surface and the bending part correspond to the size of the heat exchanger 320, so as to be wound around the outer wall surface of the heat exchanger 320, so as to better fit the outer wall surface of the heat exchanger 320, thereby improving the relationship between the infusion core 330 and the heat exchanger 320. The effective heat exchange area between them. It should be noted that both ends of the infusion tube 10 have seals. The sealing arrangement can prevent the liquid in the infusion tube 10 from flowing out of the tube.

Further, the flow channel 210 includes a circulation gap 240 and an inner cavity 110 formed on the outside of the infusion tube 10 and the inside of the wire mesh 20 , and the liquid working medium is transported along the flow channel 210 .

Please refer to FIG. 1 and FIG. 2 , the heat exchanger 320 in FIG. 2 is a radiating fin-shaped structure. The gaps between the fins are the flow channels of the internal working gas of the Stirling generator 40 , and the outer surface thereof is a cylindrical surface.

The outer wall surface of the heat source 310 corresponds to the evaporation surface, the outer wall surface of the heat exchanger 320 corresponds to the condensation wall surface, and the evaporation surface is provided with a second porous liquid suction core 3110, and the liquid working medium enters the second porous suction core of the evaporation surface from the infusion core 330. Inside the liquid core 3110 and spreads along the circumferential direction of the second porous liquid absorbent core 3110, absorbs the heat of the heat source 310 and evaporates into steam, the steam is collected at the infusion core 330, It is transferred to the direction of the heat exchanger 320, and then transferred to the condensation wall surface of the heat exchanger 320 for condensation and heat release. Because the first porous liquid-absorbing core 3210 is provided on the outer wall of the heat exchanger 320, the condensing working fluid is condensed and heat-exchanged on the first porous liquid-absorbing core 3210 disposed on the outer surface of the heat exchanger 320, and the condensed liquid enters the infusion solution The flow channel 210 in the core 330 returns to the side of the heat source 310 along the infusion core 330 to complete the cycle.

Specifically, the heat exchanger 320 and the heat source 310 are spaced apart, and the infusion core 330 forms an adiabatic section at this interval, and the outer surface of the adiabatic section can be covered with a film, thereby completely isolating the influence of steam flow. Small holes are arranged on the membrane at intervals of 5-10mm to facilitate the discharge of air bubbles in the liquid channel.

If the traditional design method is adopted, for example, referring to FIG. 5 and FIG. 6 , when the heat exchanger 320 is a tube bundle structure, it is necessary to lay wicks on the inner surface of the shell, and connect the evaporation surface and the condensation surface through the wicks. Realize the liquid transport between the two. In this way, the inner surface is completely covered with liquid absorbent cores and seamless connection is achieved, which is very difficult to function. In addition, the liquid transmission path is long, the transmission effect is greatly reduced, and the performance is very unsatisfactory. In the embodiment of the present application, the infusion core 330 is directly connected to the evaporation surface and the condensation surface, which greatly shortens the infusion distance and reduces the difficulty of process realization, so the performance can be greatly improved.

In the embodiments of the present invention, unless otherwise expressly specified and limited, the first feature "on" or "under" the second feature may be in direct contact between the first and second features, or the first and second features pass through Indirect intermediary contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials or features are included in at least one example or example of embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit of the technical solutions of the embodiments of the present invention and range.

Claims (10)

1. an infusion core, is characterized in that, comprises: At least two infusion tubes, the infusion tubes have an inner cavity for liquid to flow, a plurality of through holes communicating with the inner cavity are opened on the infusion tubes, and the side walls between the adjacent infusion tubes abut each other; A wire mesh is wrapped around the outside of the infusion tube, and the inner wall of the wire mesh is attached to the outer wall of the infusion tube, and a flow channel for liquid circulation is formed between the wire mesh and the infusion tube; wherein, The infusion pipes are respectively connected with a heat source and a heat exchanger, so as to exchange heat between the heat exchanger and the heat source. 2 . The infusion core according to claim 1 , wherein the end of the wire mesh is attached to the evaporation surface of the heat source. 3 . 3 . The infusion core according to claim 1 , wherein the through holes are sequentially spaced and spirally arranged along the axial direction of the infusion tube. 4 . 4 . The infusion core according to claim 1 , wherein the surface of the wire mesh comprises arc surfaces at both ends and a fitting plane in the middle, and the fitting plane is fitted with the outer wall surface of the heat exchanger. 5 . 5 . The infusion core according to claim 1 , wherein the flow channel comprises a circulation gap formed on the outside of the infusion tube and the inside of the wire mesh and the inner cavity, and the liquid working medium flows along the flow channel. 6 . to transmit. 6 . The infusion core according to claim 1 , wherein both ends of the infusion tube have seals. 7 . 7. A heat exchange mechanism, characterized in that, comprising: Heat Exchanger; an outer shell, which is wrapped around the outside of the heat exchanger, and a plurality of heat sources are connected in the outer shell; At least one infusion core according to any one of claims 1-6, wherein the infusion core is respectively connected with the heat source and the heat exchanger. 8 . The heat exchange mechanism according to claim 7 , wherein the number of the infusion cores is at least two, and the adjacent infusion cores are arranged at intervals along the axial direction of the heat exchanger. 9 . 9 . The heat exchange mechanism according to claim 7 , wherein the outer wall of the heat exchanger is provided with a first porous wick, and the outer wall of the heat source is provided with a second porous wick. 10 . , liquid working medium is stored in the outer wall surface of the heat exchanger, the outer wall surface of the heat source and the infusion core. 10. A Stirling generator comprising: The water cooler, the regenerator and the heat exchange mechanism according to any one of claims 7-9 are connected in sequence.

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