Wall-penetrating type heat pipe phase change heat transfer structure for heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a through-wall type heat pipe phase change heat transfer structure for a heat exchanger, which is applicable to the heat exchanger, the heat exchanger is composed of a plurality of heat exchange plates and connecting pieces used for combining the plurality of heat exchange plates, and the through-wall type heat pipe phase change heat transfer structure comprises a plurality of V-shaped grooves arranged on one sides of the heat exchange plates at equal intervals; the multiple first extension grooves are formed in the other side of the heat exchange plate at equal intervals, and the first extension grooves and the V-shaped grooves are formed in the two sides of the heat exchange plate in a front-back mode; the multiple second extension grooves and the first extension grooves are formed in the heat exchange plate on the same side; wherein the inner cavities of the V-shaped groove, the first extension groove and the second extension groove are arranged in a splayed shape, and one end with a small opening in the splayed shape is the bottom of the inner cavity; one arc-shaped groove is formed in one side of the bottom of the inner cavity of each of the V-shaped groove, the first extension groove and the second extension groove; and one side of the heat pipe is arranged in the V-shaped groove, and the other side of the heat pipe is arranged in the first extension groove or the second extension groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely relates to the heat pipe phase change heat transfer structure for heat exchanger of wall type. BACKGROUND

[0002] The heat exchanger of the wall type (also known as the heat exchanger of the surface type) is a typical heat exchanger that realizes the isolation of cold and hot fluids through a solid wall and transfers heat through the wall. The cold and hot fluids flow on both sides of the wall, and the heat is exchanged through the heat conduction of the solid wall. The heat exchange efficiency is affected by many factors, including the thermal conductivity of the wall material, the temperature difference between the cold and hot fluids, the effective heat exchange area, and the turbulence degree of fluid flow. This type of heat exchanger has the advantages of compact structure, complete fluid isolation, wide application range, easy maintenance, etc. It has good adaptability in handling corrosive, high temperature and high pressure, or toxic media, and is widely used in chemical, energy, food, pharmaceutical and other industries.

[0003] However, the traditional heat exchanger of the wall type still has problems such as large thermal resistance, limited heat transfer efficiency, and easy scaling and blocking, which limits its further application in high-efficiency heat exchange and energy-saving scenarios. To improve performance, methods such as increasing heat exchange area or complex structure (such as corrugated plate, finned tube) are often used, which has certain effect, but the structure is bulky and the volume is increased, and the theoretical bottleneck of heat transfer capacity has not been broken through.

[0004] To solve this problem, the present technology introduces heat pipe technology into the heat exchanger of the wall type to construct a "heat pipe phase change heat exchanger" structure. The heat pipe is a passive high-efficiency heat transfer element based on the principle of phase change heat transfer, which has extremely high heat conduction efficiency (up to hundreds of times that of metal) and can achieve efficient heat transfer without external power. By inserting the heat pipe into the wall, the two ends contact the cold and hot media respectively, which can greatly shorten the heat transfer path and significantly improve the thermal conductivity (theoretically from 20 W / (m·K) of stainless steel to 15000-20000 W / (m·K)). This structure not only greatly increases the heat exchange amount per unit time, but also has the advantages of temperature equalization, anti-scaling, compact design, passive operation, etc., greatly expanding the application boundary of the heat exchanger of the wall type, and is suitable for high-end fields such as high-efficiency energy saving, extreme working conditions, and new energy vehicle thermal management. SUMMARY

[0005] In view of the deficiencies of the prior art, the heat pipe phase change heat transfer structure for the heat exchanger is provided, which solves the problems raised in the background art.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme:

[0007] The application discloses a through-wall heat pipe phase change heat transfer structure for a heat exchanger.

[0008] A plurality of V-shaped grooves are equidistantly arranged on one side of the heat exchange plate.

[0009] A plurality of first extension grooves are equidistantly arranged on the other side of the heat exchange plate and are arranged on the two sides of the heat exchange plate in front of and behind the V-shaped grooves.

[0010] A plurality of second extension grooves are arranged on the heat exchange plate on the same side as the first extension grooves; wherein the cavities of the V-shaped grooves, the first extension grooves and the second extension grooves are arranged in an eight-shaped manner, and the end with a small opening in the eight-shaped manner is the bottom of the cavity.

[0011] An arc-shaped groove is arranged on one side of the bottom of the cavity of the V-shaped groove, the first extension groove and the second extension groove.

[0012] The heat pipe is arranged in the V-shaped groove on one side and arranged in the first extension groove or the second extension groove on the other side.

[0013] Optionally, the two end edges of the V-shaped groove are marked as point A and point B.

[0014] The side of the first extension groove corresponding to point A is arranged.

[0015] The side of the second extension groove corresponding to point B is arranged.

[0016] Optionally, the cavity of the V-shaped groove is arranged in an eight-shaped manner by being inclined from the horizontal position of the surface of the heat exchange plate to the bottom end of the cavity of the V-shaped groove.

[0017] Optionally, a first perforation with a size suitable for the heat pipe is arranged between the first extension groove corresponding to point A and the V-shaped groove.

[0018] Optionally, a second perforation with a size suitable for the heat pipe is arranged between the second extension groove corresponding to point B and the V-shaped groove.

[0019] Optionally, the heat pipe is divided into a C region and a D region.

[0020] One side surface of the C region is arranged in the arc-shaped groove arranged in the V-shaped groove, and the side surface is defined as the back surface of the C region, and the front surface of the C region is exposed in the V-shaped groove.

[0021] The front surface of the C region is the front surface of the D region.

[0022] The front surface of the D region is arranged in the arc-shaped groove arranged in the first extension groove or the second extension groove, and the back surface of the D region is exposed in the first extension groove or the second extension groove.

[0023] Optionally, the heat pipe is sized to fit the arc-shaped slot.

[0024] Optionally, the diameter of the arc-shaped slot is smaller than the diameters of the V-shaped slot, the first extended slot and the second extended slot.

[0025] The utility model provides a wall -penetrating heat pipe phase change heat transfer structure for heat exchanger, has the following beneficial effects:

[0026] 1, by the heat pipe penetrates the wall surface of heat exchanger, makes the both ends of heat pipe to be located in cold and hot medium respectively, utilizes the phase change heat transfer mechanism of working medium, makes heat realize efficient exchange between two medium, and its equivalent heat conductivity coefficient can be improved more than 100 times than traditional metal material, greatly shortens heat conduction path and time.

[0027] 2, heat pipe can operate without external power, can efficiently realize the shift and recovery of energy between different working conditions and different medium, and is especially suitable for energy - saving scene such as waste heat recovery, low - grade energy utilization.

[0028] 3, heat pipe maintains constant temperature characteristics during the phase change process of working medium, makes the temperature field in heat exchanger more uniform, reduces local thermal stress and material fatigue, reduces the risk of thermal crack, effectively prolongs the service life of equipment.

[0029] 4, since heat pipe has super - high heat conduction capacity per unit volume, can significantly reduce the heat exchange area and the number of sheets required for heat exchanger, realizes the design of smaller, lighter, higher integrated equipment.

[0030] 5, the uniform heat exchange temperature distribution reduces the risk of local overheating of wall surface, reduces the frequency of scale formation or corrosion, prolongs the cleaning and maintenance period, and the heat pipe structure has good high temperature resistance and low temperature resistance, and is suitable for various extreme environment working conditions.

[0031] 6, the structure of the application is passive heat exchange, does not need pump, fan and other auxiliary power devices, simplifies the system structure, reduces the operation energy consumption, and improves the safety and operation stability of the whole system. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structure schematic diagram of the utility model;

[0033] Figure 2 It is the arc-shaped slot structure schematic diagram of the utility model;

[0034] Figure 3 It is the V-shaped slot structure schematic diagram of the utility model;

[0035] Figure 4 It is the first extended slot structure schematic diagram of the utility model;

[0036] Figure 5 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0037] Figure 6 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0038] Figure 7 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0039] Figure 8 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0040] Figure 9 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0041] Figure 10 A schematic diagram of the heat pipe structure of the present application is shown in the figure.

[0042] In the figure: 1, heat exchanger; 2, heat exchange plate; 3, connecting piece; 4, V-shaped groove; 41, point A; 42, point B; 5, first extension groove; 51, first perforation; 6, second extension groove; 61, second perforation; 7, arc-shaped groove; 8, heat pipe; 81, C area; 82, D area. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0044] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "transverse", "longitudinal", "end", "edge", "side wall", "upper", "lower", "upper portion", "lower portion", "directly above", "surface", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the technical solutions of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation and be operated, and therefore cannot be understood as limiting the present application.

[0045] The present application proposes a heat pipe phase change heat transfer structure for a heat exchanger, which is as follows:

[0046] For reference Figures 6-7 The present application is applicable to a heat exchanger 1, which is composed of a plurality of heat exchange plates 2 and connecting pieces 3 for combining the plurality of heat exchange plates 2, and the heat exchanger 1 is a commonly used technology of the existing detachable plate heat exchanger or brazing heat exchanger, which will not be described in detail.

[0047] Reference can be made to Figures 1-5 The structure of the present application is mainly arranged on the heat exchange plate 2. By arranging the V-shaped groove 4, the first extension groove 5 and the second extension groove 6 on the heat exchange plate 2, and by inserting the heat pipes 8 into the grooves, and by arranging the arc-shaped grooves 7 in the V-shaped groove 4, the first extension groove 5 and the second extension groove 6 for positioning the heat pipes 8, the equivalent thermal conductivity of the structure can be increased by more than 100 times compared with the traditional metal materials, and the heat conduction path and time can be greatly shortened.

[0048] Reference can be made to Figures 1-5 The V-shaped groove 4 is arranged on one side of the heat exchange plate 2, and a plurality of V-shaped grooves 4 are arranged at equal intervals on the same horizontal plane.

[0049] Reference can be made to Figures 1-5 The first extension groove 5 is arranged on the other side of the heat exchange plate 2, and a plurality of first extension grooves 5 are arranged at equal intervals on the same horizontal plane. The number of the first extension grooves 5 is the same as that of the V-shaped grooves 4, and the spacing between the plurality of first extension grooves 5 is the same as that between the V-shaped grooves 4.

[0050] In one embodiment, the side of the heat exchange plate 2 provided with the V-shaped groove 4 is regarded as the front side of the heat exchange plate 2, and the side of the heat exchange plate 2 provided with the first extension groove 5 is regarded as the back side of the heat exchange plate 2. The V-shaped groove 4 and the first extension groove 5 are arranged on the front and back sides of the heat exchange plate 2. The arrangement of the V-shaped groove 4 and the first extension groove 5 on the front and back sides of the heat exchange plate 2 is not limited, and the arrangement can be determined according to the setting and the environment. The V-shaped groove 4 and the first extension groove 5 are arranged on the front and back sides of the heat exchange plate 2.

[0051] Reference can be made to Figures 1-5 The second extension groove 6 is arranged on the same side of the heat exchange plate 2 as the first extension groove 5, and the first extension groove 5 is arranged on the front and back sides of the heat exchange plate 2. Further, the second extension groove 6 and the first extension groove 5 are symmetrically arranged on the heat exchange plate 2, and the middle part of the connection is matched with the V-shaped groove 4.

[0052] Specifically, the inner cavities of the V-shaped groove 4, the first extension groove 5 and the second extension groove 6 are all in the shape of a splayed end, the inner cavity of the V-shaped groove 4 is splayed from the horizontal position on the surface of the heat exchange plate 2 to the bottom end of the inner cavity of the V-shaped groove 4, and the splayed end with the smaller opening is the bottom of the inner cavity, and the flow channel formed by the splayed end enables the liquid to flow in the heat exchanger 1 according to the set route.

[0053] Reference can be made to Figures 1-5 An arc-shaped groove 7 is arranged at one end of the bottom of the inner cavity of the V-shaped groove 4, the first extension groove 5 and the second extension groove 6, and the heat pipe 8 is adapted in the arc-shaped groove 7 arranged in multiple directions to work, wherein the diameter of the arc-shaped groove 7 is smaller than the diameter of the V-shaped groove 4, the first extension groove 5 and the second extension groove 6, and the flow passage does not affect each other.

[0054] Specifically, the two end edges of the V-shaped groove 4 are marked as point A 41 and point B 42, and the first extension groove 5 is arranged corresponding to the point A 41 on the other side at one end towards the second extension groove 6, that is, in one embodiment, the V-shaped groove 4 is located on the front surface of the heat exchange plate 2, and the point A 41 is also on the front surface, and the whole first extension groove 5 is formed by extending from the position corresponding to the point A 41 on the back surface of the heat exchange plate 2 to the direction away from the second extension groove 6, that is, the first extension groove 5 is located on the back surface of the heat exchange plate 2 and continues the V-shaped groove 4 from the point A 41 to one side edge of the heat exchange plate 2.

[0055] Then the same, the second extension groove 6 is arranged corresponding to the point B 42 on the side towards the first extension groove 5; that is, in one embodiment, the V-shaped groove 4 is located on the front surface of the heat exchange plate 2, and the point B 42 is also on the front surface, and the whole second extension groove 6 is formed by extending from the position corresponding to the point B 42 on the back surface of the heat exchange plate 2 to the direction away from the first extension groove 5, that is, the second extension groove 6 is located on the back surface of the heat exchange plate 2 and continues the V-shaped groove 4 from the point B 42 to the other side edge of the heat exchange plate 2.

[0056] The first extension groove 5 is provided with a first perforation 51 corresponding to the point A 41 and the V-shaped groove 4, which is adapted to the size of the heat pipe 8, the heat pipe 8 is first placed into the first extension groove 5, then passes out through the first perforation 51, and the heat pipe 8 after passing out reaches the middle of the V-shaped groove 4 and occupies half of the V-shaped groove 4.

[0057] The second extension groove 6 at the symmetrical position of the first extension groove 5 is provided with a second perforation 61 corresponding to the point B 42 and the V-shaped groove 4, which is adapted to the size of the heat pipe 8, the heat pipe 8 is first placed into the second extension groove 6, then passes out through the second perforation 61, and the heat pipe 8 after passing out reaches the middle of the V-shaped groove 4 and occupies the other half of the V-shaped groove 4.

[0058] In the opposite V-shaped groove 4, a first extension groove 5 and a second extension groove 6 are required to cooperate with each other, and the same is required to set two heat pipes 8; after the two heat pipes 8 are set in the V-shaped groove 4 at the same time, the middle part of the V-shaped groove 4 causes the distance between the two heat pipes 8 to decrease, but no intersection interference occurs during this period.

[0059] For reference Figure 1 In order to fully illustrate the connection relationship between the heat pipe 8 and the arc-shaped groove 7 and the V-shaped groove 4 thereof, the heat pipe 8 is further divided into two parts, a C area 81 and a D area 82, wherein the heat pipe 8 is sized to fit the arc-shaped groove 7 and is actually fitted inside it to work;

[0060] For reference Figures 1-5 With Figure 10 The side surface of the C area 81 is fitted in the arc-shaped groove 7 provided in the V-shaped groove 4, and the fitting surface is represented as the back surface of the C area 81, and the front surface of the C area 81 is exposed to the setting in the V-shaped groove 4; it should be noted that the front surface of the C area 81 is the front surface of the D area 82; the front surface of the D area 82 is fitted in the arc-shaped groove 7 provided in the first extension groove 5 or the second extension groove 6, and the back surface of the D area 82 is exposed to the setting in the first extension groove 5 or the second extension groove 6; thus, through the penetration setting, the two ends of the heat pipe 8 are directly located in the cold and hot medium (and the two sides of the heat exchange plate 2), respectively, and the phase change heat transfer mechanism of the working medium is used to realize efficient exchange of heat between the two media, and a large amount of heat can be efficiently transferred during the phase change process, while maintaining a relatively stable temperature, at the same time, the heat pipe 8 can operate without external power, and can efficiently realize the transfer and recovery of energy between different working conditions and different media, especially suitable for energy-saving scenes such as waste heat recovery and low-grade energy utilization.

[0061] Further, due to the setting of the heat pipe 8, it has super-high unit volume heat conduction capacity, thereby being able to significantly reduce the heat exchange area and the number of plates required for the heat exchanger, realizing smaller, lighter, and higher integrated equipment design; in addition, its uniform heat exchange temperature distribution reduces the risk of local overheating of the wall surface, reduces the frequency of scale or corrosion, and prolongs the cleaning and maintenance period; at the same time, the heat pipe structure has good high-temperature resistance and low-temperature resistance, and is suitable for various extreme environmental conditions.

[0062] For reference Figures 8-10Compared with the existing conventional heat exchanger, the heat pipe 8 in the application penetrates the wall between the heat exchange plates 2, one end of which is at the cold end and the other end is at the hot end, which increases the thermal conductivity by more than 100 times (for example, from 15-20 W / (m·K) of stainless steel in the conventional structure with 1000 times increase in thermal conductivity to 15000-20000 W / (m·K) or even higher of stainless steel+heat pipe thermal conductivity), which will completely change the performance boundary of the inter-wall heat exchanger and promote its revolutionary application in the fields of high-efficiency energy saving, extreme working conditions and miniaturization. Its advantages have disruptive technology applications in the fields of high-end industry, new energy, new energy vehicle heat management and cutting-edge technology.

[0063] It should be noted that the heat pipe 8 is a relatively mature existing technology, and its working principle is as follows:

[0064] The heat absorption end of the heat pipe: the high-temperature side heat makes the working medium in the heat pipe evaporate into gas, and carries the latent heat to the condensing end. The heat release end of the heat pipe: the gas condenses into liquid at the low-temperature side, and releases the latent heat to the external system (such as the refrigerant or water in the heat exchanger). Phase change heat exchanger linkage: the condensed working medium returns to the hot end through capillary action (or gravity), and circulates. In this process, the phase change heat exchanger further transfers energy through multiple heat pipe structures to realize multi-stage heat exchange.

[0065] In the utility model, the working steps of the device are as follows:

[0066] 1. First, the heat pipe 8 is installed in the arc-shaped groove 7 in the V-shaped groove 4, the first extension groove 5 and the second extension groove 6 on the heat exchange plate 2, ensuring that the two ends (C area 81, D area 82) of the heat pipe 8 are attached to the structure in the groove, and the heat pipe 8 passes through the corresponding perforation (first perforation 51 or second perforation 61) from the first extension groove 5 or the second extension groove 6, enters the middle part of the V-shaped groove 4, and the eight-shaped inner cavity design of the V-shaped groove 4, the first extension groove 5 and the second extension groove 6 ensures that the liquid can flow along the set route, thereby effectively guiding the heat flow;

[0067] 2. Secondly, the high-temperature medium (such as hot water or gas) enters the heat absorption end (C area 81) of the heat pipe, heats the working medium through heat conduction, evaporates it into gas, and carries away the latent heat; the evaporated working medium gas flows to the low-temperature end (D area 82), releases the latent heat at the condensing end, and condenses into liquid; during the condensation process, the heat released by the working medium is transferred to the external cooling medium (such as cold water or air) through the wall of the heat pipe 8, and the heat exchange is completed;

[0068] 3. Then, the condensed working medium liquid returns to the hot end (C area 81) of the heat pipe through capillary action or gravity, completes the cycle, and through this continuous phase change cycle, the heat pipe 8 transfers heat from the hot end to the cold end, and continuously performs efficient heat transfer;

[0069] 4. Finally, in each part of the heat pipe 8, the working fluid repeatedly undergoes evaporation and condensation processes, ensuring that heat is effectively transferred from the high-temperature medium to the low-temperature medium; through the cooperative work of multiple heat pipes, the heat exchanger 1 can achieve efficient multi-stage heat exchange.

[0070] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and various changes and improvements can be made without departing from the spirit and scope of the present application. These changes and improvements are all within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A wall-penetrating heat pipe phase transition heat transfer structure for a heat exchanger, which is applicable to a heat exchanger (1) composed of a plurality of heat exchange plates (2) and a connecting member (3) for combining the plurality of heat exchange plates (2), characterized in that: Comprising, ​ V-shaped groove (4) is provided with multiple, equidistantly opened in heat exchange plate (2) one side; First extension groove (5) is provided with multiple, equidistantly opened in heat exchange plate (2) the other side, with V-shaped groove (4) is in front and back position to be arranged on both sides of heat exchange plate (2); Second extension groove (6) is provided with multiple, with first extension groove (5) same side setting on heat exchange plate (2); Wherein, the V-shaped groove (4), first extension groove (5) and second extension groove (6) inner cavity are all arranged in the shape of eight characters, and the small end of the opening in the shape of eight characters is the inner cavity bottom; Arc-shaped groove (7) is located in the inner cavity bottom side of V-shaped groove (4), first extension groove (5) and second extension groove (6) is provided with one; Heat pipe (8) is arranged in V-shaped groove (4) on one side, and is arranged in first extension groove (5) or second extension groove (6) on the other side.

2. The phase change heat transfer structure of the through-wall heat pipe for heat exchangers according to claim 1, characterized in that: The two end edges of the V-shaped groove (4) are marked as A point (41) and B point (42); The side of the first extension groove (5) towards the second extension groove (6) is provided corresponding to the A point (41); The side of the second extension groove (6) towards the first extension groove (5) is provided corresponding to the B point (42).

3. The phase change heat transfer structure of the through-wall heat pipe for heat exchangers according to claim 1, characterized in that: The inner cavity of the V-shaped groove (4) is arranged in the shape of eight characters by the surface horizontal position of the heat exchange plate (2) towards the inner cavity bottom end of the V-shaped groove (4).

4. The phase change heat transport structure of the through-wall heat pipe for heat exchangers according to claim 2, characterized in that: The first extension groove (5) is provided with a first perforation (51) between the A point (41) and the V-shaped groove (4), which is adapted to the size of the heat pipe (8).

5. The phase change heat transport structure of the through-wall heat pipe for heat exchangers according to claim 2, characterized in that: The second extension groove (6) is provided with a second perforation (61) between the B point (42) and the V-shaped groove (4), which is adapted to the size of the heat pipe (8).

6. The phase change heat transport structure of the through-wall heat pipe for heat exchangers according to claim 1, characterized in that: The heat pipe (8) is divided into C area (81) and D area (82); One side of the C area (81) is attached to the arc-shaped groove (7) provided in the V-shaped groove (4), and the attached surface is the back surface of the C area (81), while the front surface of the C area (81) is exposed in the V-shaped groove (4); The front surface of the C area (81) is the front surface of the D area (82); The front surface of the D area (82) is attached to the arc-shaped groove (7) provided in the first extension groove (5) or the second extension groove (6), while the back surface of the D area (82) is exposed in the first extension groove (5) or the second extension groove (6).

7. The phase change heat transport structure of the through-wall heat pipe for heat exchangers according to claim 1, characterized in that: The size of the heat pipe (8) is adapted to the arc-shaped groove (7).

8. The phase change heat transfer structure of the through-wall heat pipe for heat exchangers according to claim 1, characterized in that: The diameter of the arc-shaped groove (7) is smaller than the diameter of the V-shaped groove (4), the first extension groove (5) and the second extension groove (6).

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