CN113669920B

CN113669920B - Method for improving heat transfer effect of heat transfer chain in water heater

Info

Publication number: CN113669920B
Application number: CN202111036067.7A
Authority: CN
Inventors: 唐文涛; 吴会娇; 夏洪良; 王瑞祥; 孙成鹏
Original assignee: Beijing Tongchuang Green Source Energy Technology Co ltd
Current assignee: Beijing Tongchuang Green Source Energy Technology Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2024-01-02
Anticipated expiration: 2041-09-06
Also published as: CN113669920A

Abstract

The invention discloses a method for improving the heat transfer effect of a heat transfer chain in a water heater, which is characterized in that a gap between the outer side surface of a fin wing part and an inner glass sleeve is filled with liquid with heat transfer effect, so that the heat transfer efficiency between the fin wing part and the inner glass sleeve is improved. The invention has the advantages of good sunlight absorption and heat transfer effects and high heat conversion efficiency.

Description

Method for improving heat transfer effect of heat transfer chain in water heater

Technical Field

The invention relates to the field of water heater equipment utilizing solar energy, in particular to a method for improving heat transfer effect of a heat transfer chain in a water heater.

Background

Heat utilization is an important application form for solar energy utilization. A solar water heater is a device that converts radiant energy of the sun into thermal energy. In particular, in solar water heating systems, it is necessary to collect thermal energy from solar radiation by means of a solar water heater to heat the water. Because the heat collector can only collect solar energy in a limited time of day, the heat absorption efficiency is a key for determining the quality of the solar water heating system.

Among the existing solar water heaters, the most common is a heat pipe type solar water heater, its structure mainly includes the header and heat collecting pipe, the heat collecting pipe slope sets up, the header is rectangular shape and installs and fix in the upper end of heat collecting pipe, the inside heat exchange chamber that is of header, heat exchange chamber one end is connected with the inlet tube, the other end is connected with the outlet pipe, the heat collecting pipe has a plurality ofly and along the direction interval arrangement setting in the header downside of perpendicular to header, the structure of heat collecting pipe, usually include the sleeve pipe of glass material, still include the heat pipe, the evaporation end of heat pipe inserts in the sleeve pipe, the condensation end of heat pipe exposes in the sleeve pipe and peg graft and enter into the heat exchange chamber of header, wherein the sleeve pipe usually can adopt double glazing sleeve pipe's structure, set up vacuum intermediate layer between double glazing sleeve pipe, and the surface coating heat absorbing material coating of inner sleeve pipe. When the sun irradiates, the heat absorbing material coating is irradiated through the outer sleeve and the vacuum interlayer to be absorbed and enable the inner sleeve to be heated, the arrangement of the outer sleeve and the vacuum interlayer can prevent collected heat from being taken away by external wind flow, and heat absorption and heat storage are facilitated. Fins are then typically provided between the heat pipe evaporator end and the inner sleeve to better transfer heat from the inner sleeve to the heat pipe evaporator end. When the heat pipe is in operation, after the evaporation end of the heat pipe absorbs heat, the internal working medium is heated and vaporized and moves upwards to the condensation end to release heat and condense, the heat released by the condensation end heats water in the heat exchange cavity, and meanwhile, the working medium flows back to the evaporation end downwards after being condensed at the condensation end to form circulation.

The existing solar water heater has the following defects: 1 the existing heat collecting pipe mounting structure is only provided with a sealing ring on the mounting opening of the header, because the length of the condensing end part of the heat collecting pipe is smaller, in order to improve the heat release effect of the condensing end as much as possible, then the condensing end of the heat collecting pipe needs to be inserted into the header from the sealing ring until being completely abutted on the inner wall of the other end of the inner cavity of the header, and thus the length of the condensing end in the inner cavity of the header is improved as much as possible to improve the heat release effect. However, when the heat collecting tube is installed, the position cannot be accurately measured, and the heat collecting tube is easily inserted too deeply and the contact pressure of the inner side wall of the header is too large, so that the heat collecting tube is damaged. Meanwhile, the heat pipe still has the defect that the heat release efficiency of the condensing end is lower than the heat absorption efficiency of the evaporating end, so that the heat conversion absorption effect is reduced. Meanwhile, the existing heat collecting tube mounting structure has the defect that the mounting, the inserting, the dismounting and the extracting are very inconvenient. 2 the heat absorption efficiency of the evaporation end of the heat pipe in the existing heat collecting pipe is larger than the heat release efficiency of the condensation end, so that the overall heat conversion efficiency of the heat pipe is low, and the utilization efficiency of solar radiation heat is low. In some of the prior patent technologies, phase change materials are filled between the heat pipe and the sleeve to store heat; but this in turn results in a slower heating reaction rate of the device, which is not appreciated. In the existing heat collecting tube, although fins are arranged between the evaporation end of the heat tube and the inner sleeve to transfer heat better, gaps exist between the fins and the side wall of the attached glass tube, and the fins are heated and softened easily to increase the gaps, so that air flows in the gaps after being heated, the heat transfer and heat conduction performance of the fins can be greatly influenced, and the comprehensive heat exchange coefficient of the heat collecting tube is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problems that: provided is a method for improving the heat transfer effect of a heat transfer chain in a water heater, which can improve the solar energy utilization efficiency.

In order to solve the technical problems, the invention adopts the following technical scheme:

the method for raising heat transfer effect of heat transfer chain in water heater is characterized by that the heat transfer chain formed in the water heater can absorb solar heat energy, and can transfer the solar heat energy irradiated on the heat-absorbing material coating layer of external surface of internal layer sleeve tube into internal energy of water in the internal cavity of header, and the gap between external surface of fin wing portion and internal layer glass sleeve tube is filled with liquid with heat-conducting effect so as to raise heat transfer efficiency between them.

In this way, in the method, the gap between the outer side surface of the fin wing part and the inner layer glass sleeve is filled with the liquid with heat conduction effect, so that the air gap between the fin wing part and the inner layer glass sleeve is avoided to reduce the heat transfer efficiency; meanwhile, after the air between the outer side surface of the fin wing part and the liquid of the gap between the inner layer glass sleeve is extruded, the fin wing part can be tightly attached to the inner surface of the inner layer glass sleeve under the action of air pressure, so that the fin wing part is better prevented from being softened to be separated from the inner layer glass sleeve after the temperature is increased, and the heat transfer reliability of the heat transfer chain at the heat transfer starting position is ensured. The gaps between the outer side surfaces of the fin wings and the inner glass sleeve refer to gaps generated between the fin wings and the inner glass sleeve due to shape errors and installation errors of curved surfaces after the fin wings and the inner glass sleeve are attached. Typically, the fins are made of aluminum, which provides better heat transfer.

Further, the gap between the fin mounting part and the evaporation end of the heat pipe is filled with liquid with heat conduction effect, so that heat transfer efficiency between the fin mounting part and the evaporation end of the heat pipe is improved.

In this way, it is possible to further avoid a decrease in heat transfer efficiency due to the presence of an air gap between the fin mounting portion and the evaporating end of the heat pipe.

The solar water heater comprises a mounting frame, a header and heat collecting pipes, wherein the mounting frame is obliquely arranged, the heat collecting pipes are obliquely arranged and fixed on the mounting frame, the header is of a strip shape and is installed and fixed on the mounting frame at the upper end of the heat collecting pipes, a heat exchange cavity is formed in the header, one end of the heat exchange cavity is connected with a water inlet pipe, the other end of the heat exchange cavity is connected with a water outlet pipe, the heat collecting pipes are arranged at the lower side of the header at intervals along the direction perpendicular to the header, the heat collecting pipes adopt a double-layer glass sleeve structure formed by combining inner-layer sleeves and outer-layer sleeves, a vacuum interlayer is arranged between the double-layer glass sleeves, and the outer surface of the inner-layer sleeve is coated with a heat absorbing material coating; the heat pipe is characterized by further comprising a heat pipe, an evaporation end of the heat pipe is inserted into the heat collecting pipe and is positioned in the middle of the inner cavity of the inner sleeve, a fin is arranged between the evaporation end of the heat pipe and the inner sleeve, the fin is provided with a wing part with an arc-shaped section, the outer side of the wing part is used for being attached to the inner wall of the inner sleeve and absorbing heat, the fin is also provided with an integrally annular mounting part, the evaporation end of the heat pipe is wrapped and mounted in the mounting part, and the fin is also provided with a rib part for connecting the wing part and the mounting part and transferring heat between the wing part and the mounting part; the condensing end of the heat pipe is exposed out of the heat collecting pipe and inserted into the heat exchange cavity of the header, wherein a layer of heat conducting oil film formed by heat conducting oil is arranged between the outer side surface of the wing part of the fin and the inner wall of the corresponding inner layer sleeve.

Therefore, the heat conduction oil film can avoid the influence of air entering the gap on heat transfer, and the wing parts can absorb heat better. And meanwhile, more importantly, the heat-conducting oil film has certain viscosity, so that the wing parts of the fins can still be attached to the inner wall of the inner sleeve after being heated and softened, the heat transfer efficiency is low due to the fact that the fins are separated from the inner wall of the inner sleeve due to the heated and softened state is avoided, and the stability of the heat transfer effect at the initial position of the heat transfer path is ensured. In practice, the heat-conducting oil film is formed by heat-conducting oil with good heat conductivity and cohesiveness.

Further, liquid distribution micro-channels are distributed on the outer side surfaces of the wing parts of the fins, and each liquid distribution micro-channel is composed of a plurality of liquid distribution grooves which are distributed on the outer side surfaces of the wing parts of the fins and have a depth of less than 1 millimeter.

Therefore, the liquid distribution micro-channel formed by the liquid distribution grooves can be more convenient for distributing the heat conduction oil on the surface of the wing part of the whole fin and forming a heat conduction oil film.

Further, the liquid distribution grooves comprise width direction liquid distribution grooves which are arranged along the width direction of the wing part and uniformly distributed at intervals along the length direction, and further comprise length direction liquid distribution grooves which are positioned at the positions adjacent to the first rib parts and arranged along the length direction of the fins, and one ends of the width direction liquid distribution grooves are connected with the length direction liquid distribution grooves.

In this way, the heat conduction oil can be more uniformly distributed on the whole surface of the fin wing part, and a heat conduction oil film is formed.

Further, a liquid storage groove is formed at the joint of the liquid distribution groove in the width direction and the liquid distribution groove in the length direction in an expanding mode, a liquid storage capsule is packaged in the liquid storage groove, the liquid storage capsule is used for containing heat conduction oil, and one side of the liquid storage capsule is connected with the elastic sealing strip.

Therefore, in the installation process, after the elastic sealing strip is installed in place, the elastic sealing strip is pressed against the inner wall of the inner sleeve, so that the liquid storage capsules are broken, the heat conduction oil is released, and the liquid distribution grooves are filled. Therefore, the structure is skillfully combined with the elastic sealing strip, so that the elastic deformation force application of the elastic sealing strip is utilized to release the heat conduction oil for liquid distribution in the installation process. Is very convenient, quick, ingenious and feasible.

Further, the liquid storage capsule is prepared by adopting a hot melt adhesive film, and the melting temperature of the hot melt adhesive film is about 50 ℃. Therefore, even if part of liquid storage capsules are not crushed or broken thoroughly during installation, the hot melt adhesive film can be melted and broken to distribute liquid along with the heating temperature rise of the heat collecting pipe in the using process of the device, so that the reliability of the device is improved.

Further, an isolation area formed by separating a part of the inner sleeve from the evaporation end of the heat pipe in the circumferential direction is arranged between the inner sleeve and the evaporation end of the heat pipe, solid-liquid phase-change materials are filled in the isolation area, the phase-change temperature of the solid-liquid phase-change materials is 40-60 ℃ (most preferably about 50 ℃), and a part of the fins pass through the isolation area.

In this way, in the process that the fins transfer the solar illumination heat absorbed by the heat collecting pipe to the evaporation end of the heat pipe, the solar illumination heat passes through the solid-liquid phase material and is liquefied, a part of the heat is absorbed and stored by the solid-liquid phase material, and a part of the heat is transferred to the evaporation end of the heat pipe to be absorbed and transferred into the header through the heat pipe. Therefore, a part of heat is absorbed by the solid-liquid phase change material for storage, the defect that the heat absorption efficiency of the evaporation end of the heat pipe is higher than the heat dissipation efficiency of the condensation end, so that the overall heat conversion utilization efficiency is low can be overcome, and the influence on the condensation effect due to the fact that too high temperature is caused by too much heat introduced into the condensation end of the heat pipe can be avoided. The heat stored in the phase-change material can be slowly released at night, the temperature in the tube is kept not too low, and the heat collecting tube can be well prevented from being frosted or frozen at night to cause damage in areas with large temperature difference at the morning and evening.

Further, the ribs of the fins pass through the isolation region.

Therefore, the fins are attached to the inner wall of the inner sleeve by virtue of the wing parts and absorb heat, and solid-liquid phase change materials are not arranged at the positions of the wing parts, so that the overall heat absorption effect of the fins cannot be affected. Meanwhile, after the wing parts absorb heat, the heat is concentrated to the rib parts and then is transferred to the middle mounting part through the rib parts, so that surplus heat can occur to the rib parts, and the surplus heat can be absorbed and stored by solid-liquid phase change materials in the isolation areas in the rib heat transfer process because the rib parts pass through the isolation areas, and the rest heat is normally transferred to the mounting part and enters the heat pipe. Therefore, the structure ensures that the heat collecting tube can store heat and simultaneously avoids the defect that the heating reaction rate of the device is slow due to untimely heat transfer.

Further, the rib has a plurality, and part of the rib is connected with the mounting part through the isolation area, and part of the rib is directly connected with the mounting part.

Therefore, a part of heat can be better guaranteed to be directly transferred to the installation part through the rib, when the sunlight is weak, enough heat is also directly transferred to the installation part and absorbed by the heat pipe in the installation part, and the phenomenon that the hot water effect of the device is poor due to the heat absorption influence of the solid-liquid phase material when the sunlight is weak is avoided.

Further, the sections of the wing parts are in a bad arc shape and are positioned at the left side and the right side of the heat collecting pipe, the rib parts comprise two first rib parts, and the two first rib parts extend inwards from the upper ends of the wing parts at the two sides to the central position along the diameter direction of the inner sleeve and are connected in a winding manner to form a mounting part for surrounding the evaporation end of the heat collecting pipe; the solid-liquid phase-change material is encapsulated between the two first ribs and forms an isolation region.

Thus facilitating the formation and installation of the fins and also facilitating the formation of the isolation regions. Meanwhile, after the solid-liquid phase material is heated and liquefied, the solid-liquid phase material can be filled into a gap between the mounting part and the evaporation end of the heat pipe, so that heat can be better transferred between the mounting part and the evaporation end of the heat pipe, and the heat transfer efficiency between the fins and the evaporation end of the heat pipe is increased.

Further, the joint position between the wing part and the first rib part is also provided with an elastic sealing strip arranged along the length direction of the heat collecting pipe, and the elastic sealing strip protrudes out of the outer surface of the wing part (when not stressed) and is abutted against the inner wall of the inner sleeve to form a seal.

Therefore, the fixing of the positions of the fins can be better kept after the fins are mounted, and meanwhile, the solid-liquid phase change material can be better packaged in the isolation area, so that the solid-liquid phase change material is prevented from falling into the lower space through the outer surfaces of the fins.

Further, the two first ribs are provided with a heat transfer protrusion which is formed by bending and extending in opposite directions at positions close to the mounting part.

In this way, the heat transfer protrusions extend into the solid-liquid phase change material, and the surplus heat accumulated in the mounting portion (especially, the surplus heat caused when the heat transferred to the mounting portion by the rib in the opposite direction to the first rib is excessively large) can be transferred to the solid-liquid phase change material to be stored. Meanwhile, because the heat transfer protrusion is close to the mounting part, the situation that the mounting part robs the first rib to transfer heat cannot occur too much. Meanwhile, in the process of installing the fins, the fins can be conveniently installed in the inner-layer sleeve of the heat collecting tube by inwards extruding the heat transfer protrusions to enable the wing parts of the fins to shrink inwards. After the fin is installed, an outward elastic force (the first rib is arranged along the diameter direction and cannot generate the outward elastic force along the diameter direction by itself) can be applied to the first rib by the heat transfer protrusions, so that the elastic sealing strip at the outer end of the first rib can better tightly resist and seal with the inner wall of the inner sleeve, and solid-liquid phase-change materials can be better ensured not to leak.

In addition, the fan-shaped area positions of the front end and the rear end of the isolation area in the length direction of the fin can be selectively connected in a sealing mode by elastic and flexible materials, and therefore the fin can be conveniently installed in a mode of compressing the fin part, and the fin can be inserted and installed more conveniently and rapidly. Of course, in implementation, the front end and the rear end of the isolation area in the length direction of the fin can also be sealed by embedding an elastic sealing strip at the upper surface position after the two sides of the fan-shaped connecting plate and the rib are sealed and fixed. In addition, the front end and the rear end of the heat pipe can be further sealed by sleeving sealing rings, so that the isolation area can be better completely sealed and isolated, and solid-liquid phase-change materials are prevented from leaking. In addition, in the implementation, the solid-liquid phase change material can adopt 48# paraffin, 58# paraffin, trioxymethylene paraffin, erythritol and the like, and the filling capacity can be about 75% of the filling reserved space (the filling capacity is changed according to the angle of the heat collector), so that the overflow of the solid-liquid phase change material which is easy to melt due to excessive filling is prevented.

Further, the lower end position of the wing part is also provided with a second rib part which extends inwards to a middle position along the diameter direction of the inner sleeve and is connected with the mounting part.

Therefore, a part of heat can be better guaranteed to be directly transferred to the installation part through the rib, when solar illumination is weak, the part of heat absorbed by the wing parts can directly reach the heat pipe to be prevented from being absorbed by the phase change material, and the hot water effect of the device in the cloudy day is guaranteed. Meanwhile, the second rib can better support the wing parts, so that the wing parts of the fins can still be attached to the inner wall of the inner sleeve after being heated and softened, the heat transfer efficiency is low due to the fact that the fins are separated from the inner wall of the inner sleeve due to the heated and softened state is avoided, and the stability of the heat transfer effect at the initial position of the heat transfer path is guaranteed.

Further, the inner end of the second rib is provided with an upward folded section, and the folded section is connected and fixed with the mounting part.

In this way, the second rib can generate a radially outward spring force (which cannot be generated if the second rib is arranged radially as a whole) by means of the upwardly folded portion, which spring force can make the wing portion better fit against the inner wall of the inner sleeve. Simultaneously, more importantly, after the heat pipe evaporation end can be inserted into the installation part of the fin firstly by the folding section when the fin is installed, the installation part is held firstly, the folding section of the second rib is compressed, so that the two side fins are inwards close, then the whole fin can be conveniently and rapidly inserted into the inner layer sleeve, after the fin is inserted in place, the folding section of the second rib is loosened, the two side fins are outwards ejected and are attached to the inner wall of the inner layer sleeve, then the folding section of the second rib can be pushed along the outwards diameter direction, the two side fins are better attached to the inner wall of the inner layer sleeve tightly, and liquid storage capsules are better extruded and crushed, so that the release of the heat conducting oil is realized. So the convenience of installation is greatly improved.

Further, a sealing plug is arranged at the front end face between the inner sleeve and the outer sleeve, and the evaporation end of the heat pipe is inserted into and sealed and fixed on the sealing plug.

Thus, the heat pipe and the inner and outer double-layer sleeve are convenient to install and fix.

Further, a spring clip is arranged at the bottom of the rear end between the inner sleeve and the outer sleeve.

Thus, the interval between the inner double-layer sleeve and the outer double-layer sleeve is convenient to keep.

Further, the condensing end of the heat pipe is inserted into the heat exchange cavity to the adjacent or attached position of the inner side wall of the header heat exchange cavity opposite to the plug-in port.

Therefore, the condensing end is inserted into the heat exchange cavity to the deepest extent, and the heat release efficiency of the condensing end can be improved to the greatest extent.

Further, a groove is formed in the inner side wall of the header heat exchange cavity, which is opposite to the inserting port, an elastic pad with the area larger than the end part of the condensation end of the heat pipe is embedded in the groove, and the condensation end of the heat pipe is abutted against the elastic pad.

Therefore, when the condensation end of the heat pipe is inserted into the innermost part of the heat exchange chamber, the condensation end of the heat pipe is protected, and damage caused by propping against the inner side wall of the heat exchange chamber of the header is avoided. And then can make the heat pipe condensation end heat transfer effect maximize under the prerequisite of guaranteeing the safety assembly.

Further, the outer surface of the elastic pad is provided with a heat dissipation plate, the area of the heat dissipation plate is larger than the end part of the condensation end of the heat pipe, and the heat dissipation plate is made of a material with heat transfer efficiency larger than that of water.

Therefore, the end part of the condensing end of the heat pipe can be further convenient to conduct heat outwards through the heat dissipation plate, and the heat release efficiency of the condensing end is improved.

Further, the heat dissipation plate is made of aluminum materials. Low cost and better heat dissipation effect.

Further, the heat collecting pipe and the header are connected through a quick-insertion limiting structure.

Like this, the heat-collecting tube accomplishes the erection joint through inserting limit structure soon, realizes spacingly in the time of can guaranteeing quick installation, avoids the heat pipe condensation end of heat-collecting tube to insert too dark and the header inner wall butt is too tight to lead to the damage, has made things convenient for quick installation and has guaranteed exothermic efficiency after the installation.

Further, the quick-insertion limiting structure comprises a condensation end of the heat pipe, the condensation end of the heat pipe is completely exposed out of a sealing plug on the end face of the heat collecting pipe, and the diameter of the condensation end of the heat pipe is larger than that of the evaporation end of the heat pipe; the quick-plug limiting structure further comprises a heat collecting pipe mounting groove positioned on the mounting surface of the header, the end part of the heat collecting pipe is inserted and matched in the heat collecting pipe mounting groove, a plug-in port communicated to the heat exchange cavity and used for inserting the condensation end of the heat supplying pipe is formed in the middle position of the bottom of the heat collecting pipe mounting groove, and a sealing ring matched with the condensation end of the heat pipe is arranged on the plug-in port.

Therefore, the limit of the end part of the heat collecting tube is realized by the heat collecting tube mounting groove, the condensation end of the heat collecting tube is inserted into the heat exchange cavity from the plug-in port, and the sealing between the condensation end of the heat collecting tube and the plug-in port of the header is realized by the sealing ring. Therefore, the quick installation limit of the heat collecting tube can be realized, and the installation is very convenient and quick.

Further, the quick-insertion limiting structure further comprises a circle of elastic limiting rings arranged on the inner side wall of the heat collecting pipe mounting groove, and the elastic limiting rings are used for contacting and limiting the outer peripheral surface of the heat collecting pipe when the heat collecting pipe is mounted.

Therefore, the notch of the heat collecting pipe mounting groove can be opened larger to facilitate the insertion of the heat collecting pipe by means of the contact and limitation of the outer peripheral surface of the elastic limiting ring and the heat collecting pipe, the heat collecting pipe is limited by the elastic limiting ring after being inserted, and two positioning points of the sealing ring and the elastic limiting ring are arranged in the length direction of the heat collecting pipe, so that the alignment can be better ensured and the quick mounting can be realized.

Further, the sealing ring is fixedly arranged at the inserting port, the periphery of the front end of the sealing ring is provided with a circle of elastic clamping pieces which are outwards folded in half before being arranged, one end of each elastic clamping piece is fixed with the sealing ring, the other end of each elastic clamping piece is fixedly connected with an abutting disc, the abutting disc is positioned at the position adjacent to or attached to the inner side wall of the heat exchange cavity of the header opposite to the inserting port after being unfolded, and the condensation end of the heat pipe is inserted and matched in the sealing ring to enable the elastic clamping pieces to be in an unfolded state; a space is reserved between the end face of the end part of the heat collecting pipe and the bottom face of the heat collecting pipe installation groove.

Like this, in the installation, after the heat pipe condensation end of heat-collecting tube tip inserts the heat transfer cavity from the grafting mouth, can directly support the butt dish and insert to the heat transfer cavity is inside, until the elasticity clamping piece is promoted to the expansion state, and the heat-collecting tube can't be promoted again this moment, and elasticity clamping piece and butt dish are wrapped the heat pipe condensation end together and are assisted to realize fixedly, improve fixed effect. Meanwhile, the abutting plate is located at the position adjacent to or attached to the inner side wall of the header heat exchange cavity opposite to the plug-in port, so that the condensation end can be guaranteed to be located in the heat exchange cavity to the greatest extent. Therefore, the heat collecting pipe is convenient to install and fix, and the heat release efficiency of the condensing end in the heat exchange cavity can be improved to the greatest extent.

Further, the shape of the abutting disc is consistent with the shape of the end face of the condensing end of the heat pipe, and the cross section of the elastic clamping piece is an arc consistent with the cross section circle of the condensing end of the heat pipe.

After the heat collecting pipe is installed and inserted, the condensation end of the heat pipe can be just wrapped by the abutting plate and the unfolded elastic clamping piece in a fitting mode, and therefore the phenomenon that the condensation end of the heat pipe is difficult to pull out when the condensation scale is condensed and removed due to the fact that the condensation end of the heat pipe is directly exposed in a heat exchange cavity for a long time is avoided. Greatly improves the convenience degree of device maintenance and disassembly.

Further, the abutting plate and the elastic clamping piece are made of materials with heat transfer efficiency larger than that of water; the outer side surface of the front half section of the elastic clamping piece far away from the plug-in port is provided with a rib protruding outwards along the length direction.

Therefore, after the heat collecting pipe is installed and inserted, the condensation end of the heat collecting pipe can be just wrapped by the abutting plate and the unfolded elastic clamping piece in a fitting way; therefore, after the abutting plate and the elastic clamping piece are made of materials with heat transfer efficiency larger than that of water, under the auxiliary heat dissipation effect of the abutting plate, the elastic clamping piece and the rib structure, heat emitted by the condensation end of the heat pipe can be rapidly emitted into running water in the heat exchange cavity. The heat release efficiency of the condensation end of the heat pipe is greatly improved in an auxiliary mode, the phenomenon that the condensation effect is influenced due to the fact that the temperature is too high due to untimely heat dissipation of the condensation end is avoided, and then the heat utilization efficiency of the device is greatly improved as a whole.

Further, the abutting plate and the elastic clamping piece are made of aluminum materials, the elastic clamping piece comprises a front half section and a rear half section, the rib is made of elastic metal materials, the rib is integrally welded to the middle of the outer surface of the front half section of the elastic clamping piece in the length direction, the front end and the rear end of the rib exceed the front end and the rear end of the front half section of the elastic clamping piece and are flattened, the front end of the rib exceeds the front end portion of the front half section of the elastic clamping piece and is welded and fixed on the abutting plate (front end) after being flattened, and the rear end of the rib exceeds the rear end portion of the front half section of the elastic clamping piece and is welded to the outer side face of the rear half section of the elastic clamping piece in a bending state after being flattened.

Therefore, the abutting plate and the elastic clamping piece are made of aluminum, so that the heat dissipation and heat release effects can be better improved; meanwhile, the connection between the two sections of elastic clamping pieces and the abutting disc is conveniently realized by means of the ribs made of elastic metal materials, the elasticity is kept, and the heat collecting tube can be conveniently disassembled and pulled out and then can be quickly reset.

Further, the rear end of the elastic clamping piece at the rear half section is provided with a connecting strip narrowing in the width direction, and the connecting strip is spliced and fixed in the sealing ring after being bent.

Thus, the elastic clamping piece is convenient to connect with the sealing ring and can keep deformation.

Further, the front end of the front half section of the elastic clamping piece is connected to the front end of the abutting disc, the front end of the sealing ring extends forwards from the front end of the plug-in port to form a lip with a horn-shaped inner surface, and when the elastic clamping piece is in a half-folding state, the rear end of the abutting disc can fall into the lip to form sealing.

Therefore, in the process of disassembling and overhauling the heat collecting tube, after the heat collecting tube is pulled out, the elastic clamping piece is restored to a half-folded state, and the abutting disc is driven to be restored to abut against the lip, and is tightly pressed to form a seal under the action of water pressure in the heat exchange cavity. Water leakage is avoided, and online disassembly and overhaul of the heat collecting pipe are conveniently realized.

Further, the rear end of the sealing ring is exposed backwards from the rear end of the plug-in port and forms a limiting bulge, and a hanging step is formed between the limiting bulge and the bottom surface of the heat collecting pipe mounting groove.

The sealing ring is convenient to position by means of the hanging steps during assembly, and the front end face of the heat collecting tube can be buffered by the limiting protrusions during installation of the heat collecting tube, so that damage is avoided.

Further, the main body part of the header is made of polyurethane material; the outer surface of the body portion of the header also has a shell of greater rigidity. Therefore, the heat-insulating device has enough heat-insulating effect and avoids heat dissipation and loss in the heat exchange cavity.

Further, when the condensing end of the heat pipe is inserted and the elastic clamping piece is in an unfolding state, the condensing end of the heat pipe is abutted against the outer surface of the elastic pad through the abutting disc.

Therefore, the condensation end of the heat pipe can be inserted into the innermost part of the heat exchange chamber, the condensation end of the heat pipe is protected, and damage caused by propping against the inner side wall of the heat exchange chamber of the header is avoided. And then can make the heat pipe condensation end heat transfer effect maximize under the prerequisite of guaranteeing the safety assembly.

Further, when the condensing end of the heat pipe is inserted and the elastic clamping piece is in an unfolding state, the condensing end of the heat pipe is abutted with the surface of the heat dissipation plate through the abutting disc.

In conclusion, the solar heat-transfer device has the advantages of good sunlight absorption and heat transfer effects and high heat conversion efficiency.

Drawings

FIG. 1 is a schematic diagram of a solar water heater with high heat transfer efficiency used in the practice of the present invention.

Fig. 2 is a schematic partial structure diagram of the single quick-plug limiting structure in fig. 1.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a schematic structural diagram of the device for sealing and fixing the condensation end of the single heat pipe in fig. 1.

Fig. 5 is a schematic view of the individual heat collecting pipes of fig. 1.

Fig. 6 is a schematic cross-sectional view of fig. 5.

FIG. 7 is a schematic illustration of the structure of the individual fins of FIG. 6.

Fig. 8 is a left side view of fig. 7.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The specific implementation method comprises the following steps: the method for raising heat transfer effect of heat transfer chain in water heater is characterized by that the heat transfer chain formed in the water heater can absorb solar heat energy, and can transfer the solar heat energy irradiated on the heat-absorbing material coating layer of external surface of internal layer sleeve tube into internal energy of water in the internal cavity of header, and the gap between external surface of fin wing portion and internal layer glass sleeve tube is filled with liquid with heat-conducting effect so as to raise heat transfer efficiency between them.

Wherein, the gap between the fin mounting part and the evaporation end of the heat pipe is filled with liquid with heat conduction effect, so that the heat transfer efficiency between the fin mounting part and the evaporation end of the heat pipe is improved.

Specifically, the method is implemented by adopting the solar water heater with high heat transfer efficiency shown in fig. 1-8, the solar water heater with high heat transfer efficiency comprises a mounting frame (the mounting frame is not shown in the drawing), a header 1 and a heat collecting pipe 2, wherein the mounting frame is obliquely arranged, the heat collecting pipe 2 is obliquely arranged and fixed on the mounting frame, the header is of a strip shape and is arranged and fixed on the mounting frame at the upper end of the heat collecting pipe, a heat exchange cavity 3 is arranged in the header, one end of the heat exchange cavity 3 is connected with a water inlet pipe 4, the other end of the heat exchange cavity is connected with a water outlet pipe 5, the heat collecting pipe 2 is arranged at the lower side of the header at intervals along the direction perpendicular to the header, the solar water heater also comprises heat pipes 6, evaporation ends 7 of the heat pipes 6 are inserted into the heat collecting pipes, and condensation ends 8 of the heat pipes are exposed out of the heat collecting pipes 2 and are inserted into the heat exchange cavity 3 of the header 1.

Wherein, the condensation end 8 of the heat pipe is inserted into the heat exchange chamber 3 to the adjacent or adjacent position of the inner side wall of the header heat exchange chamber opposite to the plug-in port.

Wherein, the heat collecting tube 2 is connected with the header 1 through a quick-insertion limit structure.

Wherein, the heat collecting tube 2 adopts a double-layer glass sleeve structure formed by combining an inner layer sleeve 9 and an outer layer sleeve 10, a vacuum interlayer is arranged between the double-layer glass sleeves, and the outer surface of the inner layer sleeve is coated with a heat absorbing material coating 11.

Therefore, the heat absorbing material coating can absorb the illumination heat better, and the vacuum interlayer is used for isolating air, so that heat loss is avoided.

Wherein, the evaporation end 7 of the heat pipe 6 is positioned in the middle part of the inner cavity of the inner sleeve 9, and fins 12 are arranged between the evaporation end 7 of the heat pipe and the inner sleeve 9.

This allows for better heat transfer. Typically, the fins are made of aluminum, which provides better heat transfer.

The quick-insertion limiting structure comprises a condensation end 8 of a heat pipe 6, wherein the condensation end 8 of the heat pipe is totally exposed out of a sealing plug 13 on the end face of the heat collecting pipe, and the diameter of the condensation end 8 of the heat pipe is larger than that of a vaporization end 7 of the heat pipe; the quick-insertion limiting structure further comprises a heat collecting pipe mounting groove 14 positioned on the mounting surface of the header, the end part of the heat collecting pipe is inserted and matched in the heat collecting pipe mounting groove 14, an inserting port communicated to the heat exchange cavity and used for inserting the condensation end of the heat supplying pipe is formed in the middle of the bottom of the heat collecting pipe mounting groove, and a sealing ring 15 matched with the condensation end of the heat pipe is arranged on the inserting port.

The quick-insertion limiting structure further comprises a ring of elastic limiting rings 23 arranged on the inner side wall of the heat collecting pipe mounting groove, and the elastic limiting rings 23 are used for contacting and limiting the outer peripheral surface of the heat collecting pipe when the heat collecting pipe is mounted.

Therefore, the notch of the heat collecting pipe mounting groove can be opened larger to facilitate the insertion of the heat collecting pipe by means of the contact and limitation of the outer peripheral surface of the elastic limiting ring and the heat collecting pipe, the heat collecting pipe is limited by the elastic limiting ring after being inserted, and two positioning points of the sealing ring and the elastic limiting ring are arranged in the length direction of the heat collecting pipe, so that the alignment can be better ensured and the quick mounting can be realized. In implementation, the elastic limiting ring is made of rubber materials.

The sealing ring 15 is fixedly arranged at the inserting port, the periphery of the front end of the sealing ring is provided with a circle of elastic clamping piece, the elastic clamping piece comprises a front half section 16 and a rear half section 17, the front part of the sealing ring is in an outward half-folding state, one end of the elastic clamping piece is fixedly connected with the sealing ring 15, the other end of the elastic clamping piece is fixedly connected with an abutting disc 18, the abutting disc 18 is positioned at the position adjacent to or attached to the inner side wall of the heat exchange chamber of the header opposite to the inserting port after the elastic clamping piece is unfolded, and the condensation end 8 of the heat pipe is inserted and matched in the sealing ring 15 to enable the elastic clamping piece to be in an unfolded state; a space is reserved between the end face of the end part of the heat collecting pipe and the bottom face of the heat collecting pipe installation groove.

Wherein, the shape of the abutting disc 18 is consistent with the shape of the end face of the condensation end 8 of the heat pipe, and the cross section of the elastic clamping piece is an arc consistent with the cross section circle of the condensation end of the heat pipe.

Wherein, the abutting plate 18 and the elastic clamping piece are made of materials with heat transfer efficiency greater than that of water; the outer side surface of the front half section of the elastic clamping piece far away from the plug-in port is provided with a rib 19 protruding outwards along the length direction.

The abutting plate 18 and the elastic clamping piece are made of aluminum materials, the elastic clamping piece comprises a front half section 16 and a rear half section 17, the rib 19 is made of elastic metal materials, the rib 19 is integrally welded to the middle of the outer surface of the front half section of the elastic clamping piece in the length direction, the front end and the rear end of the rib 19 exceed the front end and the rear end of the front half section of the elastic clamping piece and are flattened, the front end part of the rib exceeds the front end part 16 of the front half section of the elastic clamping piece and is welded and fixed on the abutting plate (front end), and the rear end of the rib exceeds the rear end part of the front half section of the elastic clamping piece and is welded to the outer side face of the rear half section 17 of the elastic clamping piece in a bending state after being flattened.

The rear end of the elastic clamping piece at the rear half section is provided with a connecting strip 20 narrowing in the width direction, and the connecting strip 20 is spliced and fixed in the sealing ring after being bent.

Thus, the elastic clamping piece is convenient to connect with the sealing ring and can keep deformation. So based on above-mentioned structure, this application still discloses a device for sealing and fixing heat pipe condensation end in fact, its foundation structure is, including a sealing washer 15, the sealing washer 15 outside is used for cooperating with the grafting mouth of collecting tube mounting groove bottom intermediate position on the header, the sealing washer 15 inboard is used for the cooperation of heat pipe condensation end to insert, sealing washer front end periphery is provided with round elasticity clamping piece, elasticity clamping piece is outside half folding state, elasticity clamping piece one end is fixed with sealing washer 15, other end fixedly connected with butt dish 18, the sealing washer external diameter is greater than the butt dish external diameter. The specific external shape of each member in the sealing and fixing device can be further reduced to the external shape structure defined above and described later. The sealing fixing device can be assembled and installed in the plug-in port of the header after being produced, processed and formed independently; so that the production and the assembly are more convenient.

The front end of the front half section 16 of the elastic clamping piece is connected to the front end of the abutting disc 18, and the front end of the sealing ring extends forwards from the front end of the plug-in port to form a lip 21 with a horn-shaped inner surface, so that when the elastic clamping piece is in a half-folded state, the rear end of the abutting disc 18 can fall into the lip 21 to form sealing.

The rear end of the sealing ring 15 is exposed backward from the rear end of the plug connector and forms a limiting protrusion 22, and a hanging step is formed between the limiting protrusion 22 and the bottom surface of the heat collecting pipe mounting groove.

Wherein, the main body part of the header is made of polyurethane material; the outer surface of the body portion of the header also has a more rigid outer shell 34 which may be formed of a metallic material or a rigid plastic material to enhance the overall strength of the device. Therefore, the heat-insulating device has enough heat-insulating effect and avoids heat dissipation and loss in the heat exchange cavity.

Wherein, be provided with a recess on the heat transfer cavity 3 of header 1 just to the inside wall of interface, the recess is embedded to be provided with a piece area and is greater than the elastic pad 24 of heat pipe condensation end tip, and the condensation end of heat pipe inserts and makes the elastic clamping piece be when expanding the state, and the butt dish pastes with the elastic pad 24 surface.

Wherein, the elastic pad 24 is provided with a heat dissipation plate 25 on the outer surface, the area of which is larger than the end of the condensing end of the heat pipe, the heat dissipation plate is made of a material with heat transfer efficiency larger than that of water, and the condensing end of the heat pipe is inserted and the elastic clamping piece is in an unfolding state, and the surface of the heat dissipation plate 25 is abutted to the abutting plate.

Therefore, the end part of the condensing end of the heat pipe can be further convenient to conduct heat outwards through the heat dissipation plate, and the heat release efficiency of the condensing end is improved. Meanwhile, according to the principle, the grooves and the elastic materials therein and the structural mode of further adding the heat dissipation plate can be independently implemented on the header, so that the header structure which is convenient for installing the heat pipe and improves the protection effect in the process of installing the heat pipe can be obtained.

Wherein the heat dissipation plate 25 is made of aluminum material. Low cost and better heat dissipation effect.

The heat pipe comprises an inner sleeve, a heat pipe evaporation end, a solid-liquid phase change material, a fin 12, a heat pipe evaporation end, an insulation area 26, a solid-liquid phase change material and a heat pipe evaporation end, wherein the insulation area 26 is formed by separating a part of the heat pipe evaporation end in the circumferential direction, the solid-liquid phase change material is filled in the insulation area 26, the phase change temperature of the solid-liquid phase change material is 40-60 ℃ (most preferably about 50 ℃), and the part of the fin 12 passes through the insulation area 26.

Wherein, the fin 12 has a wing part 27 with arc-shaped cross section, the outer side of the wing part 27 is used for being attached to the inner wall of the inner sleeve and absorbing heat, the fin also has an integrally annular mounting part 28, the evaporation end of the heat pipe is wrapped and mounted in the mounting part, the fin also has a rib part for connecting the wing part and the mounting part and for transferring heat between the two parts, and the rib part passes through the isolation area.

Wherein the ribs are provided in plurality, a portion of the ribs are connected to the mounting portion 28 via the isolation region, and a portion of the ribs are directly connected to the mounting portion.

The sections of the wing parts 27 are in a bad arc shape and are positioned at the left side and the right side of the heat collecting pipe, the rib parts comprise two first rib parts 29, and the two first rib parts 29 extend inwards from the upper ends of the wing parts at the two sides to the central position along the diameter direction of the inner sleeve and are connected with each other in a winding manner to form a mounting part 28 for surrounding the evaporation end of the heat collecting pipe; the solid-liquid phase-change material is encapsulated between the two first ribs and forms the isolation region 26.

The joint position between the wing part 27 and the first rib part 29 is also provided with an elastic sealing strip 30 arranged along the length direction of the heat collecting tube, and the elastic sealing strip 30 protrudes out of the outer surface of the wing part (when not stressed) and is abutted against the inner wall of the inner sleeve to form a seal.

The two first ribs 29 are each provided with a heat transfer protrusion 39 formed by bending and extending in opposite directions at positions close to the mounting portion 28.

And a layer of heat conducting oil film formed by heat conducting oil is arranged between the outer side surfaces of the wing parts of the fins 12 and the inner wall of the corresponding inner sleeve.

The fin is characterized in that liquid distribution micro-channels 31 are distributed on the outer side surfaces of the fins, and each liquid distribution micro-channel 31 is composed of a plurality of liquid distribution grooves which are distributed on the outer side surfaces of the fins and have a depth of less than 1 millimeter.

Wherein, the liquid distribution groove includes the width direction liquid distribution groove 32 that sets up along wing width direction and evenly arranges along length direction interval, still including being located adjacent department with first rib and along the length direction of fin length direction liquid distribution groove 33, width direction liquid distribution groove one end meets with length direction liquid distribution groove.

Wherein, the joint of the width direction liquid distribution groove and the length direction liquid distribution groove is also extended to form a liquid storage groove 35, a liquid storage capsule is encapsulated in the liquid storage groove 35, the liquid storage capsule is used for containing heat conduction oil, and one side of the liquid storage capsule is connected with an elastic sealing strip.

Wherein the liquid storage capsule is prepared by adopting a hot melt adhesive film, and the melting temperature of the hot melt adhesive film is about 50 ℃. Therefore, even if part of liquid storage capsules are not crushed or broken thoroughly during installation, the hot melt adhesive film can be melted and broken to distribute liquid along with the heating temperature rise of the heat collecting pipe in the using process of the device, so that the reliability of the device is improved.

Wherein the lower end position of the wing part 27 is also provided with a second rib 36 which extends inwards to an intermediate position along the diameter direction of the inner sleeve and is connected with the mounting part.

Wherein, the inner end position of the second rib 36 is provided with an upward folded section 37, and is connected and fixed with the mounting part through the folded section.

The front end face between the inner sleeve and the outer sleeve is provided with a sealing plug 13, and the evaporation end of the heat pipe is inserted into and sealed and fixed on the sealing plug 13.

Wherein a spring clip 38 is provided at the bottom of the rear end between the inner sleeve and the outer sleeve.

Claims

1. The method for improving the heat transfer effect of the heat transfer chain inside the water heater is characterized in that the gap between the outer side surface of the fin wing part and the inner glass sleeve is filled with liquid with heat transfer effect, so that the heat transfer efficiency between the fin wing part and the inner glass sleeve is improved;

the solar water heater with high heat transfer efficiency comprises a mounting frame, a header and heat collecting pipes, wherein the mounting frame is obliquely arranged, the heat collecting pipes are obliquely arranged and fixed on the mounting frame, the header is of a strip shape and is installed and fixed on the mounting frame at the upper end of the heat collecting pipes, a heat exchange cavity is arranged in the header, one end of the heat exchange cavity is connected with a water inlet pipe, the other end of the heat exchange cavity is connected with a water outlet pipe, the heat collecting pipes are arranged at the lower side of the header at intervals along the direction perpendicular to the header, the heat collecting pipes adopt a double-layer glass sleeve structure formed by combining an inner layer sleeve and an outer layer sleeve, a vacuum interlayer is arranged between the double-layer glass sleeve, and the outer surface of the inner layer sleeve is coated with a heat absorbing material coating; the heat pipe is characterized by further comprising a heat pipe, an evaporation end of the heat pipe is inserted into the heat collecting pipe and is positioned in the middle of the inner cavity of the inner sleeve, a fin is arranged between the evaporation end of the heat pipe and the inner sleeve, the fin is provided with a wing part with an arc-shaped section, the outer side of the wing part is used for being attached to the inner wall of the inner sleeve and absorbing heat, the fin is also provided with an integrally annular mounting part, the evaporation end of the heat pipe is wrapped and mounted in the mounting part, and the fin is also provided with a rib part for connecting the wing part and the mounting part and transferring heat between the wing part and the mounting part; the condensing end of the heat pipe is exposed out of the heat collecting pipe and is inserted into a heat exchange cavity of the header, wherein a layer of heat conducting oil film formed by heat conducting oil is arranged between the outer side surface of a wing part of the fin and the inner wall of the corresponding inner layer sleeve;

The outer side surfaces of the wing parts of the fins are distributed with liquid distribution micro-channels, and the liquid distribution micro-channels are formed by a plurality of liquid distribution grooves which are distributed on the outer side surfaces of the wing parts of the fins and have a depth of less than 1 millimeter;

the liquid distribution grooves comprise width-direction liquid distribution grooves which are arranged along the width direction of the wing part and uniformly distributed at intervals along the length direction, and further comprise length-direction liquid distribution grooves which are positioned adjacent to the first rib parts and arranged along the length direction of the fins, and one ends of the width-direction liquid distribution grooves are connected with the length-direction liquid distribution grooves;

the joint of the width-direction liquid distribution groove and the length-direction liquid distribution groove is also extended to form a liquid storage groove, a liquid storage capsule is encapsulated in the liquid storage groove, the liquid storage capsule is used for containing heat conduction oil, and one side of the liquid storage capsule is connected with the elastic sealing strip.

2. The method for improving the heat transfer effect of a heat transfer chain in a water heater according to claim 1, wherein a liquid having a heat conducting effect is filled in a gap between the fin mounting portion and the evaporating end of the heat pipe to improve the heat transfer efficiency therebetween.

3. The method for improving heat transfer effect of heat transfer chain in water heater as set forth in claim 1, wherein an isolation area formed by separating part of the inner sleeve and the evaporating end of the heat pipe in circumferential direction is provided between the inner sleeve and the evaporating end of the heat pipe, solid-liquid phase change material is filled in the isolation area, the phase change temperature of the solid-liquid phase change material is 40-60 ℃, and part of the fin passes through the isolation area;

The sections of the wing parts are in a bad arc shape and are positioned at the left side and the right side of the heat collecting pipe, the rib parts comprise two first rib parts, and the two first rib parts extend inwards from the upper ends of the wing parts at the two sides to the central position along the diameter direction of the inner sleeve and are connected with each other in a winding manner to form a mounting part for surrounding the evaporation end of the heat collecting pipe; the solid-liquid phase-change material is encapsulated between the two first ribs and forms an isolation region.

4. The method for improving heat transfer effect of heat transfer chain in water heater according to claim 3, wherein the joint position between the wing part and the first rib part is also provided with an elastic sealing strip arranged along the length direction of the heat collecting tube, the elastic sealing strip protrudes out of the outer surface of the wing part and is abutted against the inner wall of the inner sleeve to form a seal;

the two first ribs are provided with a heat transfer protrusion which is formed by bending and extending towards opposite directions at positions close to the mounting part.

5. A method of improving the heat transfer effect of a heat transfer chain within a water heater as set forth in claim 3, wherein the lower end of the wing portion further has a second rib extending radially inwardly of the inner sleeve to a mid-position where it meets the mounting portion;

the inner end of the second rib is provided with an upward folded section which is connected and fixed with the mounting part through the folded section;

A sealing plug is arranged at the front end face between the inner sleeve and the outer sleeve, and the evaporation end of the heat pipe is inserted into and sealed and fixed on the sealing plug;

a spring clip is arranged at the bottom of the rear end between the inner sleeve and the outer sleeve.

6. The method for improving the heat transfer effect of a heat transfer chain in a water heater according to claim 3, wherein the condensing end of the heat pipe is inserted into the heat exchange chamber to a position adjacent to or in contact with the inner side wall of the heat exchange chamber of the header opposite to the plug-in port;

a groove is formed in the inner side wall of the front opposite plug-in port of the header heat exchange chamber, an elastic pad with the area larger than the end part of the condensation end of the heat pipe is embedded in the groove, and the condensation end of the heat pipe is propped against the elastic pad;

the outer surface of the elastic pad is provided with a heat dissipation plate, the area of the heat dissipation plate is larger than the end part of the condensation end of the heat pipe, and the heat dissipation plate is made of a material with heat transfer efficiency larger than that of water.

7. The method for improving the heat transfer effect of a heat transfer chain in a water heater according to claim 6, wherein the heat collecting pipe is connected with the header through a quick-plug limiting structure;

the quick-insertion limiting structure comprises a condensation end of the heat pipe, wherein the condensation end of the heat pipe is totally exposed out of a sealing plug on the end face of the heat collecting pipe, and the diameter of the condensation end of the heat pipe is larger than that of the evaporation end of the heat pipe; the quick-plug limiting structure also comprises a heat collecting pipe mounting groove positioned on the mounting surface of the header, the end part of the heat collecting pipe is inserted and matched in the heat collecting pipe mounting groove, the middle position of the bottom of the heat collecting pipe mounting groove is provided with an inserting port which is communicated with the heat exchange cavity and is used for inserting the condensation end of the heat supplying pipe, and the inserting port is provided with a sealing ring matched with the condensation end of the heat pipe;

The quick-insertion limiting structure also comprises a circle of elastic limiting rings arranged on the inner side wall of the heat collecting pipe mounting groove, wherein the elastic limiting rings are used for contacting and limiting the outer peripheral surface of the heat collecting pipe when the heat collecting pipe is mounted;

the sealing ring is fixedly arranged at the inserting port, the periphery of the front end of the sealing ring is provided with a circle of elastic clamping piece, the elastic clamping piece is in an outward half-folded state before being arranged, one end of the elastic clamping piece is fixed with the sealing ring, the other end of the elastic clamping piece is fixedly connected with an abutting disc, the abutting disc is positioned at the position adjacent to or attached to the inner side wall of the heat exchange cavity of the header, which is opposite to the inserting port, after the elastic clamping piece is unfolded, the condensation end of the heat pipe is inserted and matched in the sealing ring, and the elastic clamping piece is in an unfolded state; a space is reserved between the end face of the end part of the heat collecting pipe and the bottom face of the heat collecting pipe installation groove.

8. The method for improving the heat transfer effect of a heat transfer chain in a water heater according to claim 7, wherein the shape of the abutting disc is consistent with the shape of the end face of the condensing end of the heat pipe, and the cross section of the elastic clamping piece is in an arc shape consistent with the cross section circle of the condensing end of the heat pipe;

the abutting plate and the elastic clamping piece are made of materials with heat transfer efficiency larger than that of water; the outer side surface of the front half section of the elastic clamping piece far away from the plug-in port is provided with a rib protruding outwards along the length direction;

The elastic clamping piece comprises a front half section and a rear half section, the rib is made of elastic metal materials, the whole rib is welded in the middle of the outer surface of the front half section of the elastic clamping piece along the length direction, the front end and the rear end of the rib exceed the front end and the rear end of the front half section of the elastic clamping piece and are flattened, the front end of the rib exceeds the front end of the front half section of the elastic clamping piece and is welded and fixed on the abutting plate after being flattened, and the rear end of the rib exceeds the rear end of the front half section of the elastic clamping piece and is welded to the outer side surface of the rear half section of the elastic clamping piece in a bending state after being flattened;

the rear end of the elastic clamping piece at the rear half section is provided with a connecting strip narrowing in the width direction, and the connecting strip is spliced and fixed in the sealing ring after being bent;

the front end of the front half section of the elastic clamping piece is connected to the front end of the abutting disc, and the front end of the sealing ring extends forwards from the front end of the plug-in port to form a lip with a horn-shaped inner surface, so that the rear end of the abutting disc can fall into the lip to form a seal when the elastic clamping piece is in a half-folding state;

the rear end of the sealing ring is exposed backwards from the rear end of the plug-in port and forms a limiting bulge, and a hanging step is formed between the limiting bulge and the bottom surface of the heat collecting pipe mounting groove.