Heat exchanger and water heater
By integrating the main heat exchange assembly and the condensing heat exchange assembly on one heat exchanger, the problems of complex structure and large volume of existing gas water heaters are solved, and a higher energy efficiency and a more compact structure are achieved.
Patent Information
- Application Number
- CN202421470868.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-25
AI Technical Summary
Due to the split design and long connecting pipes, the heat exchangers of existing gas water heaters have complex structures and large volumes, making it difficult to achieve higher energy efficiency.
An integrated heat exchanger structure is adopted, and the main heat exchange assembly and condensation heat exchange assembly are integrated on one heat exchanger. Two-stage heat exchange is achieved through an integrated heat exchanger, simplifying the structure and reducing volume.
A simpler and more compact heat exchanger structure is achieved, reducing volume, improving energy efficiency, and reducing production and maintenance costs.
Smart Images
Figure CN222926011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchange, in particular to a heat exchanger and a water heater. Background Art
[0002] Under the background of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. To improve energy efficiency, it is necessary to utilize the latent heat of vaporization of flue gas and increase condensation heat transfer. In related technologies, some gas water heaters include a main heat exchanger and a condensation heat exchanger, which can achieve two-stage heat transfer of main heat transfer and condensation heat transfer. However, the main heat exchanger and the condensation heat exchanger generally adopt a split design, with a complex structure. Moreover, a relatively long connecting pipe is required between the main heat exchanger and the condensation heat exchanger to achieve their connection, resulting in a large volume of the heat exchanger. Summary of the Utility Model
[0003] The main purpose of the utility model is to provide a heat exchanger and a water heater, aiming to achieve two-stage heat transfer through a simpler heat exchanger structure and reduce the volume of the heat exchanger.
[0004] To achieve the above object, the utility model provides a heat exchanger, comprising:
[0005] A main heat transfer assembly, including a first heat transfer pipeline;
[0006] A condensation heat transfer assembly, including a second heat transfer pipeline, the second heat transfer pipeline defining a first heat transfer layer and a second heat transfer layer. The first heat transfer pipeline, the first heat transfer layer, and the second heat transfer layer are arranged in sequence along a first direction. The second heat transfer pipeline has a water inlet part and a water outlet part. The water outlet part is located in the first heat transfer layer, and the water inlet part is located in the second heat transfer layer. The water outlet part is communicated with the water inlet end of the first heat transfer pipeline.
[0007] In one embodiment, the first heat transfer pipeline includes a plurality of first heat transfer tubes extending along a second direction, the plurality of first heat transfer tubes being spaced apart and communicated along a third direction. The main heat transfer assembly further includes a fin group sleeved around the plurality of first heat transfer tubes; the first direction, the second direction, and the third direction intersect pairwise.
[0008] In one embodiment, the second heat transfer pipeline includes a plurality of second heat transfer tubes extending along a second direction. The first heat transfer layer and the second heat transfer layer are respectively provided with the second heat transfer tubes. The plurality of second heat transfer tubes in the same heat transfer layer are spaced apart along a third direction. The number of second heat transfer tubes in the first heat transfer layer is the same as that in the second heat transfer layer. The second heat transfer tubes in the first heat transfer layer and the second heat transfer layer are arranged staggeredly; the first direction, the second direction, and the third direction intersect pairwise.
[0009] In one embodiment, the second heat exchange tubes of the first heat exchange layer and the second heat exchange tubes of the second heat exchange layer are alternately communicated, so that the second heat exchange pipeline is in a spiral coil structure that spirally winds and extends along the third direction.
[0010] In one embodiment, the heat exchanger further includes two end plates oppositely arranged along the second direction, and the main heat exchange assembly and the condensation heat exchange assembly are arranged between the two end plates; the first direction intersects with the second direction.
[0011] In one embodiment, the water inlet end of the first heat exchange pipeline and the water outlet part face the same side of the heat exchanger, and the heat exchanger further includes a connecting pipe, and the water outlet part and the water inlet end of the first heat exchange pipeline are communicated through the connecting pipe.
[0012] In one embodiment, the heat exchanger further includes a water inlet pipe, a water outlet pipe and a bypass pipe. The water inlet pipe is communicated with the water inlet part, the water outlet pipe is communicated with the water outlet end of the first heat exchange pipeline, one end of the bypass pipe is communicated with the connecting pipe, and the other end of the bypass pipe is communicated with the water outlet pipe.
[0013] In one embodiment, the water outlet pipe has a water inlet section and a water outlet section that are communicated with each other. The water inlet section extends in a bent manner from the water outlet end of the first heat exchange pipeline toward the side close to the connecting pipe, and the water outlet section is located at one end of the water inlet section close to the connecting pipe.
[0014] In one embodiment, the condensation heat exchange assembly is located below the main heat exchange assembly and is downstream of the main heat exchange assembly in the flue gas flow direction. The water outlet pipe further includes a lifting section communicated between the water inlet section and the water outlet section, and the lowest height inside the lifting section is not less than the highest height inside the first heat exchange pipeline.
[0015] The present utility model further provides a water heater, including the heat exchanger as described above.
[0016] The technical solution of the present utility model integrates the main heat exchange component and the condensation heat exchange component on a heat exchanger, and realizes two-stage heat exchange through an integrated heat exchanger, making the overall structure of the heat exchanger simpler and more compact, which is beneficial to reducing the volume. The second heat exchange pipeline of the condensation heat exchange component constructs a first heat exchange layer and a second heat exchange layer. In practical applications, the burner of the water heater can be arranged on the side of the main heat exchange component far from the condensation heat exchange component, and the high-temperature flue gas generated by the combustion of the burner can sequentially pass through the main heat exchange component, the first heat exchange layer and the second heat exchange layer for heat exchange. The water inlet part is located in the second heat exchange layer, and the water outlet part is located in the first heat exchange layer. The water outlet part is communicated with the water inlet end of the first heat exchange pipeline. In this way, the distance between the water outlet part and the water inlet end of the first heat exchange pipeline can be shortened in the height direction of the heat exchanger, the length of the connecting pipe for connecting the main heat exchange component and the condensation heat exchange component can be reduced, and the volume of the heat exchanger can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model.
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.
[0019] Figure 1 is a schematic structural diagram of an embodiment of the heat exchanger provided by the present utility model;
[0020] Figure 2 is Figure 1 a schematic structural diagram of the heat exchanger from another angle;
[0021] Figure 3 is Figure 1 the front view of the heat exchanger in;
[0022] Figure 4 is Figure 3 the sectional structural diagram of.
[0023] Description of the reference numerals in the drawings:
[0024] 100, Heat exchanger; 10, Main heat exchange component; 11, First heat exchange pipeline; 111, First heat exchange tube; 12, Fin group; 121, Fin; 20, Condensation heat exchange component; 20a, First heat exchange layer; 20b, Second heat exchange layer; 21, Second heat exchange pipeline; 211, Water inlet part; 212, Water outlet part; 213, Second heat exchange tube; 30, End plate; 40, Connecting pipe; 50, Water inlet pipe; 60, Water outlet pipe; 61, Water inlet section; 62, Water outlet section; 63, Lifting section; 70, Bypass pipe.
[0025] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0028] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0029] In the related art, some gas water heaters include a main heat exchanger and a condensing heat exchanger, which can achieve two-stage heat exchange of main heat exchange and condensing heat exchange. However, the main heat exchanger and the condensing heat exchanger generally adopt a split design, with a complex structure. Moreover, a relatively long connecting pipe is required between the main heat exchanger and the condensing heat exchanger to achieve their connection, resulting in a large volume of the heat exchanger.
[0030] Based on this, the present utility model proposes a heat exchanger 100, which realizes two-stage heat exchange through a simpler heat exchanger structure and reduces the volume of the heat exchanger 100.
[0031] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the heat exchanger 100 includes a main heat exchange assembly 10 and a condensing heat exchange assembly 20. The main heat exchange assembly 10 includes a first heat exchange pipeline 11; the condensing heat exchange assembly 20 includes a second heat exchange pipeline 21, and the second heat exchange pipeline 21 constructs a first heat exchange layer 20a and a second heat exchange layer 20b. The main heat exchange assembly 10, the first heat exchange layer 20a, and the second heat exchange layer 20b are arranged in sequence in a first direction. The second heat exchange pipeline 21 has a water inlet part 211 and a water outlet part 212. The water outlet part 212 is located in the first heat exchange layer 20a, the water inlet part 211 is located in the second heat exchange layer 20b, and the water outlet part 212 is communicated with the water inlet end of the first heat exchange pipeline 11.
[0032] The heat exchanger 100 includes a main heat exchange assembly 10 and a condensing heat exchange assembly 20. When applied to a water heater, the burner of the water heater can be arranged on the side of the main heat exchange assembly 10 away from the condensing heat exchange assembly 20, so that the condensing heat exchange assembly 20 is located downstream of the main heat exchange assembly 10 in the flue gas flow direction. In this way, the high-temperature flue gas generated by the combustion of the burner flows towards the heat exchanger 100. The high-temperature flue gas first exchanges heat on the surface of the main heat exchange assembly 10, and then exchanges heat by condensation on the surface of the condensing heat exchange assembly 20; the second heat exchange pipeline 21 introduces cold water through the water inlet part 211. For example, the water inlet part 211 can be connected to the water inlet pipe 50 of the heat exchanger 100. External cold water can be transported into the second heat exchange pipeline 21 through the water inlet part 211 for preheating, and the preheated water is then transported to the first heat exchange pipeline 11 by the water outlet part 212 for reheating and then hot water is output.
[0033] The second heat exchange pipeline 21 constructs a first heat exchange layer 20a and a second heat exchange layer 20b, and the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b are arranged in sequence in the first direction. Among them, the first direction can be the height direction (i.e., the up and down direction) of the heat exchanger 100. The main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b can be arranged in sequence from top to bottom. Correspondingly, when applied, the burner can be arranged above the main heat exchange component 10. During the process of the flue gas flowing from top to bottom, it can sequentially pass through the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b for heat exchange. Or, the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b can be arranged in sequence from bottom to top. Correspondingly, when applied, the burner can be arranged below the main heat exchange component 10. During the process of the flue gas flowing from bottom to top, it can sequentially pass through the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b for heat exchange.
[0034] It should be noted that the water inlet part 211 is located in the second heat exchange layer 20b, and the water outlet part 212 is located in the first heat exchange layer 20a. Among them, the water inlet part 211 and the water outlet part 212 can be arranged on the same side of the heat exchanger 100; or the water inlet part 211 is arranged on one side of the heat exchanger 100, and the water outlet part 212 is arranged on the other side of the heat exchanger 100. However, regardless of whether the water inlet part 211 and the water outlet part 212 are arranged on the same side of the heat exchanger 100, the water outlet part 212 is arranged adjacent to the first heat exchange pipeline 11 in the height direction of the heat exchanger 100 relative to the water inlet part 211, and then the water outlet part 212 is communicated with the water inlet end of the first heat exchange pipeline 11. In this way, the distance between the water outlet part 212 and the water inlet end of the first heat exchange pipeline 11 can be shortened in the height direction of the heat exchanger 100, the length of the connecting pipe 40 for connecting the main heat exchange component 10 and the condensation heat exchange component 20 can be reduced, and the volume of the heat exchanger 100 can be reduced.
[0035] The technical solution of the present utility model integrates the main heat exchange component 10 and the condensation heat exchange component 20 on a heat exchanger 100, and realizes two-stage heat exchange through the integrated heat exchanger 100, making the overall structure of the heat exchanger 100 simpler and more compact, which is beneficial to reducing the volume. The second heat exchange pipeline 21 of the condensation heat exchange component 20 constructs a first heat exchange layer 20a and a second heat exchange layer 20b. In practical applications, the burner of the water heater can be arranged on the side of the main heat exchange component 10 away from the condensation heat exchange component 20, and the high-temperature flue gas generated by the combustion of the burner can sequentially pass through the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b for heat exchange. The water inlet part 211 is located in the second heat exchange layer 20b, and the water outlet part 212 is located in the first heat exchange layer 20a. The water outlet part 212 is communicated with the water inlet end of the first heat exchange pipeline 11. In this way, the distance between the water outlet part 212 and the water inlet end of the first heat exchange pipeline 11 can be shortened in the height direction of the heat exchanger 100, the length of the connecting pipe 40 for realizing the connection between the main heat exchange component 10 and the condensation heat exchange component 20 can be reduced, and the volume of the heat exchanger 100 can be reduced.
[0036] As Figures 1 to 4 shown, in an embodiment, the first heat exchange pipeline 11 includes a plurality of first heat exchange tubes 111 extending along the second direction, and the plurality of first heat exchange tubes 111 are arranged at intervals and communicated along the third direction. The main heat exchange component 10 further includes a fin group 12 sleeved outside the plurality of first heat exchange tubes 111; the first direction, the second direction, and the third direction intersect pairwise.
[0037] In this embodiment, the main heat exchange component 10 is realized by a tube-fin heat exchange structure. The plurality of first heat exchange tubes 111 extend along the second direction. Among them, the second direction is the length direction of the heat exchanger 100 (for example, the left-right direction). The plurality of first heat exchange tubes 111 can be connected in series or in parallel to form the first heat exchange pipeline 11. The plurality of first heat exchange tubes 111 can be arranged in one layer, two layers or more in the third direction. Among them, the third direction is the width direction of the heat exchanger 100 (for example, the front-back direction). Optionally, the plurality of first heat exchange tubes 111 are arranged at intervals in a single-layer structure along the third direction, and the plurality of first heat exchange tubes 111 can be connected in series through connecting elbows to form a first heat exchange pipeline 11 extending in a circuitous manner. The fin group 12 includes a plurality of fins 121, and the plurality of fins 121 are arranged along the second direction to form the fin group 12. Each fin 121 is provided with a plurality of through holes, and the number of through holes is adapted to the number of first heat exchange tubes 111.
[0038] Exemplarily, as Figure 4As shown, each heat exchange pipeline includes four first heat exchange tubes 111 arranged in a single row along the third direction. Correspondingly, each fin 121 is provided with four through holes arranged in a single row along the third direction, and the first heat exchange tubes 111 are inserted into the through holes on the fins 121 in a one-to-one correspondence. Of course, the number of the first heat exchange tubes 111 is not limited to four, and can also be three, five or more, for example. A gap for the flue gas to pass through is formed between two adjacent fins 121. The high-temperature flue gas passes through the gap between the fins 121 along the incoming flow direction, sweeps across the surface of the fins 121, and realizes the heat transfer from the high-temperature flue gas to the fins 121, so as to heat the water in the first heat exchange tubes 111, and can effectively improve the heat exchange efficiency.
[0039] As Figures 1 to 4 As shown, in an embodiment, the second heat exchange pipeline 21 includes a plurality of second heat exchange tubes 213 extending along the second direction. The first heat exchange layer 20a and the second heat exchange layer 20b are respectively provided with the second heat exchange tubes 213. The plurality of second heat exchange tubes 213 in the same heat exchange layer are arranged at intervals along the third direction. The number of the second heat exchange tubes 213 in the first heat exchange layer 20a is the same as the number of the second heat exchange tubes 213 in the second heat exchange layer 20b. The second heat exchange tubes 213 in the first heat exchange layer 20a and the second heat exchange tubes 213 in the second heat exchange layer 20b are arranged staggeredly; the first direction, the second direction, and the third direction intersect pairwise.
[0040] In this embodiment, each heat exchange layer has a plurality of second heat exchange tubes 213 arranged at intervals along the third direction, and the second heat exchange tubes 213 can extend along the second direction. Among them, the second direction can be the length direction of the heat exchanger 100, and the third direction can be the width direction of the heat exchanger 100. The distance between the outer edges of the two outermost second heat exchange tubes 213 in the same heat exchange layer in the third direction is the width dimension of the heat exchange layer. The number of the second heat exchange tubes 213 in the first heat exchange layer 20a is equal to the number of the second heat exchange tubes 213 in the second heat exchange layer 20b, so that the width dimension of the first heat exchange layer 20a is equal to the width dimension of the second heat exchange layer 20b. Moreover, the second heat exchange tubes 213 in the first heat exchange layer 20a and the second heat exchange tubes 213 in the second heat exchange layer 20b are arranged staggeredly. For example, the second heat exchange tubes 213 in the first heat exchange layer 20a can be opposite to the gap between two adjacent second heat exchange tubes 213 in the second heat exchange layer 20b. In this way, it can be avoided that the projections of the second heat exchange tubes 213 in two adjacent heat exchange layers completely overlap in the flue gas flow direction, so that the flue gas can fully contact the surfaces of the second heat exchange tubes 213 in each heat exchange layer during the flow process for heat exchange, so as to improve the heat exchange efficiency; in addition, the condensed water generated on the surfaces of the second heat exchange tubes 213 in the upper heat exchange layer can also drip downward from the gap between two adjacent second heat exchange tubes 213 in the lower heat exchange layer, ensuring that the condensed water can be discharged smoothly.
[0041] Exemplarily, as Figure 4 shown, the first heat exchange layer 20a includes six second heat exchange tubes 213 arranged at intervals along the third direction, and the second heat exchange layer 20b includes six second heat exchange tubes 213 arranged at intervals along the third direction. Of course, the number of the second heat exchange tubes 213 in the first heat exchange layer 20a and the second heat exchange layer 20b is not limited to this, and can be set according to actual needs. Taking the first heat exchange layer 20a being located above the second heat exchange layer 20b as an example, the width dimension of the first heat exchange layer 20a is equal to the width dimension of the second heat exchange layer 20b, and the second heat exchange tubes 213 of the first heat exchange layer 20a are completely staggered from the second heat exchange tubes 213 of the second heat exchange layer 20b, so that the cross-section of the second heat exchange pipeline 21 in the direction parallel to the flue gas flow direction generally presents a parallelogram structure with the same width up and down, thereby avoiding the projections of the second heat exchange layers 20b of two adjacent heat exchange layers completely overlapping in the flue gas flow direction, increasing the contact area between each second heat exchange tube 213 and the flue gas, and improving the condensation heat exchange efficiency.
[0042] In one embodiment, the second heat exchange tube 213 can be implemented by using a smooth tube. The surface of the smooth tube is smoother, which is beneficial to the rapid dripping of condensed water and avoids the occurrence of condensed water blockage. Alternatively, the second heat exchange tube 213 can also be implemented by using a corrugated tube. Compared with the smooth tube, the folds on the surface of the corrugated tube can increase the heat exchange area. Thus, when the length of the second heat exchange pipeline 21 is the same, the heat exchange efficiency can be improved. Or, when the same heat exchange efficiency is achieved, the length of the second heat exchange pipeline 21 can be shortened, saving materials and reducing costs. And, compared with the finned tube, the fold depth on the surface of the corrugated tube is shallower and it is not easy to accumulate condensed water, avoiding the occurrence of condensed water blockage.
[0043] As Figure 1 and Figure 2 shown, in one embodiment, the second heat exchange tubes 213 of the first heat exchange layer 20a and the second heat exchange tubes 213 of the second heat exchange layer 20b are alternately communicated, so that the second heat exchange pipeline 21 has a spiral coil structure that spirally winds and extends along the third direction.
[0044] In this embodiment, starting from the water inlet part 211 as the starting end, a section of pipeline is formed in the second heat exchange layer 20b, then extends into the first heat exchange layer 20a to form another pipeline, then extends into the second heat exchange layer 20b to form another section of pipeline, and then extends into the first heat exchange layer 20a to form another section of pipeline and then forms the water outlet part 212. It can be seen that the second heat exchange tubes 213 of the first heat exchange layer 20a and the second heat exchange tubes 213 of the second heat exchange layer 20b are alternately communicated to form the second heat exchange pipeline 21 that spirally winds and extends along the third direction.
[0045] In one embodiment, the second heat exchange pipeline 21 is integrally formed by winding a single pipe. In this way, the manufacturing process of the second heat exchange pipeline 21 can be simplified, so that the second heat exchange pipeline 21 does not need to be welded or spliced by multiple pipes, and the risk of water leakage can be reduced.
[0046] In one embodiment, the first heat exchange pipeline 11 is made of copper pipe, and the second heat exchange pipeline 21 is made of stainless steel pipe. In this way, the first heat exchange pipeline 11 can make full use of the high thermal conductivity of copper to achieve sufficient heat exchange with the flue gas and improve the main heat exchange efficiency. The second heat exchange pipeline 21 is made of stainless steel pipe, which can prevent blockage by condensate, and stainless steel has good corrosion resistance, which can prevent the condensate from corroding the surface of the second heat exchange pipeline 21.
[0047] As Figure 1 and Figure 2 shown, in one embodiment, the heat exchanger 100 further includes two end plates 30 oppositely arranged along the second direction, and the main heat exchange assembly 10 and the condensation heat exchange assembly 20 are arranged between the two end plates 30; the first direction intersects with the second direction.
[0048] In this embodiment, the first heat exchange pipeline 11 and the second heat exchange pipeline 21 share two end plates 30 for installation and fixation, which is beneficial to simplifying the structure of the heat exchanger 100, saving materials, reducing costs, and at the same time reducing the volume of the heat exchanger 100.
[0049] As Figure 1 and Figure 2 shown, in one embodiment, the water inlet end of the first heat exchange pipeline 11 and the water outlet part 212 face the same side of the heat exchanger 100, and the heat exchanger 100 further includes a connecting pipe 40, and the water outlet part 212 and the water inlet end of the first heat exchange pipeline 11 are connected through the connecting pipe 40.
[0050] In this embodiment, the water inlet end of the first heat exchange pipeline 11 and the water outlet part 212 face the same side of the heat exchanger 100, that is, the water inlet end and the water outlet part 212 of the first heat exchange pipeline 11 are arranged on the same side. In this way, the length of the connecting pipe 40 for connecting the water inlet end and the water outlet part 212 of the first heat exchange pipeline 11 can be shortened, thereby reducing the volume of the heat exchanger 100.
[0051] On the basis of the above embodiments, as Figure 1 and Figure 2 shown, in one embodiment, the heat exchanger 100 further includes a water inlet pipe 50, a water outlet pipe 60 and a bypass pipe 70. The water inlet pipe 50 is communicated with the water inlet part 211, the water outlet pipe 60 is communicated with the water outlet end of the first heat exchange pipeline 11, one end of the bypass pipe 70 is communicated with the connecting pipe 40, and the other end of the bypass pipe 70 is communicated with the water outlet pipe 60.
[0052] In this embodiment, when the heat exchanger 100 operates, external cold water can be transported through the water inlet pipe 50 to the second heat exchange pipeline 21 for preheating, and then transported to the first heat exchange pipeline 11 through the water outlet part 212 for continuous heating. The heated hot water is output from the water outlet pipe 60. Moreover, when the hot water is output from the water outlet pipe 60, the water with a relatively high temperature in the second heat exchange pipeline 21 can flow into the water outlet pipe 60 through the bypass pipe 70 for mixing, so as to reduce the temperature rise of the heat exchanger 100 when it stops working.
[0053] On the basis of the above embodiment, as Figure 1 and Figure 2 shown, in one embodiment, the water outlet pipe 60 has a water inlet section 61 and a water outlet section 62 that are connected to each other. The water inlet section 61 extends in a bent manner from the water outlet end of the first heat exchange pipeline 11 towards the side close to the connecting pipe 40. The water outlet section 62 is located at one end of the water inlet section 61 close to the connecting pipe 40. When the water outlet pipe 60 and the water inlet pipe 50 are arranged on the same side of the heat exchanger 100, the water outlet section 62 is arranged adjacent to the connecting pipe 40, which can further shorten the length of the bypass pipe 70 connecting the water outlet section 62 and the connecting pipe 40 and reduce the volume of the heat exchanger 100.
[0054] When the water pressure of the external water source pumped into the heat exchange pipe is insufficient and the position of the first heat exchange pipeline 11 is relatively high, it is possible that the water in the first heat exchange pipeline 11 flows out of the water outlet pipe 60 before filling the entire pipe cavity. Since the water in the first heat exchange pipe 111 cannot fill the voids, when the burner heats the first heat exchange pipeline 11, the water in the pipe evaporates into high-temperature steam and impacts the pipe wall, generating vaporization noise.
[0055] To reduce the vaporization noise of the water heater, in one embodiment, the condensing heat exchange assembly 20 is located below the main heat exchange assembly 10 and is downstream of the main heat exchange assembly 10 in the flue gas flow direction. The water outlet pipe 60 further includes a lifting section 63 connected between the water inlet section 61 and the water outlet section 62, and the lowest height inside the lifting section 63 is not less than the highest height inside the first heat exchange pipeline 11.
[0056] In this embodiment, the condensation heat exchange assembly 20 is located below the main heat exchange assembly 10. When applied to a water heater, the burner of the water heater can be arranged above the main heat exchange assembly 10, so that the condensation heat exchange assembly 20 is located downstream of the main heat exchange assembly 10 in the flue gas flow direction. In this way, the high-temperature flue gas generated by the combustion of the burner flows from top to bottom, first passes through the main heat exchange assembly 10 for main heat exchange, and then passes through the condensation heat exchange assembly 20 for condensation heat exchange. The temperature of the flue gas after heat exchange with the main heat exchange assembly 10 is generally higher than the flue gas dew point temperature by a certain margin, and no condensed water will be generated on the surface of the main heat exchange assembly 10. Therefore, even if the main heat exchange assembly 10 adopts a finned tube heat exchange structure, there will be no problem of condensed water clogging due to the accumulation of condensed water in the gaps between the fins 121. The condensation heat exchange assembly 20 adopts a tube heat exchange structure, and there are no fins 121 around the second heat exchange pipeline 21, so that the condensed water generated on the surface of the second heat exchange pipeline 21 can drip quickly, so as to avoid the accumulation of condensed water in the gaps between the fins 121 and cause condensed water blockage. Moreover, the condensation heat exchange assembly 20 is located below the main heat exchange assembly 10, and the condensed water generated on the surface of the condensation heat exchange assembly 20 can drip downward under the action of gravity, but will not drip onto the surface of the main heat exchange assembly 10 to affect the main heat exchange efficiency.
[0057] Based on the above content, the water outlet pipe 60 further includes a lifting section 63, and the lowest height inside the lifting section 63 is not less than the highest height inside the first heat exchange pipeline 11. In this way, when hot water flows out through the water outlet pipe 60, it will pass through the lifting section 63. When the water level reaches the lifting section 63, since the lowest point of the lifting section 63 is not less than the highest point of the first heat exchange pipeline 11, the water level inside the first heat exchange pipeline 11 can reach its highest point when the lifting section 63 can intake water. Even when the water heater 100 intakes a small amount of water, the inside of the first heat exchange pipeline 11 can still be filled with water without gaps. When the first heat exchange pipeline 11 is heated, it can avoid the high-temperature vaporization of the water inside and the collision between the vapor and the pipe wall at the gap part to generate vaporization noise, thus improving the sound insulation effect when the water heater 100 is in use.
[0058] The present utility model also proposes a water heater, which includes a heat exchanger 100. The specific structure of the heat exchanger 100 refers to the above embodiment. Since this water heater adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0059] Among them, the water heater further includes components such as a burner and a blower. The burner can be arranged on the side of the main heat exchange component 10 away from the condensation heat exchange component 20. The blower is used to drive the air flow to flow from the burner towards the heat exchanger 100. In this way, the high-temperature flue gas generated by the combustion of the burner can sequentially pass through the main heat exchange component 10 and the condensation heat exchange component 20 for heat exchange. For example, the blower, the burner, and the heat exchanger 100 can be arranged in sequence from top to bottom. When the water heater is working, the blower can drive the air flow to flow from top to bottom from the burner towards the heat exchanger 100, so that the high-temperature flue gas generated by the combustion of the burner flows from top to bottom and sequentially passes through the main heat exchange component 10 and the condensation heat exchange component 20 of the heat exchanger 100 to achieve two-stage heat exchange. Or, the blower, the burner, and the heat exchanger 100 can also be arranged in sequence from bottom to top. By driving the air flow to flow from bottom to top from the burner towards the heat exchanger 100 by the blower, the high-temperature flue gas generated by the combustion of the burner flows from bottom to top and sequentially passes through the main heat exchange component 10 and the condensation heat exchange component 20 of the heat exchanger 100 to achieve two-stage heat exchange.
[0060] The above are only some embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims
1. A heat exchanger, characterized in that: include: A main heat exchange assembly, comprising a first heat exchange pipeline; The condensing heat exchange component includes a second heat exchange pipeline, the second heat exchange pipeline is configured with a first heat exchange layer and a second heat exchange layer, the first heat exchange pipeline, the first heat exchange layer and the second heat exchange layer are arranged in sequence along a first direction, the second heat exchange pipeline has a water inlet and a water outlet, the water outlet is located in the first heat exchange layer, the water inlet is located in the second heat exchange layer, and the water outlet is connected to the water inlet end of the first heat exchange pipeline.
2. The heat exchanger according to claim 1, characterized in that The first heat exchange pipeline includes a plurality of first heat exchange tubes extending along the second direction, and the plurality of first heat exchange tubes are arranged at intervals and connected along the third direction. The main heat exchange component also includes a fin group sleeved on the periphery of the plurality of first heat exchange tubes; the first direction, the second direction, and the third direction intersect each other.
3. The heat exchanger according to claim 1, characterized in that The second heat exchange pipeline includes a plurality of second heat exchange tubes extending along the second direction, the first heat exchange layer and the second heat exchange layer are respectively arranged with the second heat exchange tubes, the plurality of second heat exchange tubes in the same heat exchange layer are arranged at intervals along the third direction, the number of second heat exchange tubes in the first heat exchange layer is the same as the number of second heat exchange tubes in the second heat exchange layer, the second heat exchange tubes in the first heat exchange layer are staggered with the second heat exchange tubes in the second heat exchange layer; the first direction, the second direction and the third direction intersect each other.
4. The heat exchanger according to claim 3, characterized in that The second heat exchange tubes of the first heat exchange layer and the second heat exchange tubes of the second heat exchange layer are alternately connected, so that the second heat exchange pipeline is a spiral coil structure that is spirally coiled and extends along the third direction.
5. The heat exchanger according to claim 1, characterized in that The heat exchanger further includes two end plates arranged opposite to each other along a second direction, and the main heat exchange component and the condensing heat exchange component are arranged between the two end plates; the first direction intersects with the second direction.
6. The heat exchanger according to any one of claims 1 to 5, characterized in that: The water inlet end of the first heat exchange pipeline and the water outlet portion face the same side of the heat exchanger. The heat exchanger further includes a connecting pipe, and the water outlet portion and the water inlet end of the first heat exchange pipeline are connected through the connecting pipe.
7. The heat exchanger according to claim 6, characterized in that The heat exchanger also includes an inlet pipe, an outlet pipe and a bypass pipe, the inlet pipe is connected to the water inlet part, the outlet pipe is connected to the water outlet end of the first heat exchange pipeline, one end of the bypass pipe is connected to the connecting pipe, and the other end of the bypass pipe is connected to the outlet pipe.
8. The heat exchanger according to claim 7, characterized in that The water outlet pipe has an inlet section and an outlet section which are interconnected. The inlet section is bent and extended from the outlet end of the first heat exchange pipeline toward a side close to the connecting pipe. The outlet section is located at one end of the inlet section close to the connecting pipe.
9. The heat exchanger according to claim 8, characterized in that The condensing heat exchange component is located below the main heat exchange component and downstream of the main heat exchange component in the direction of flue gas flow. The water outlet pipe also includes a lifting section connected between the water inlet section and the water outlet section. The lowest height inside the pipe of the lifting section is not less than the highest height inside the pipe of the first heat exchange pipeline.
10. A water heater, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.