Heat exchanger and water heater

Abstract

The utility model discloses a heat exchanger and a water heater, and relates to the technical field of heat exchange, and the heat exchanger comprises a main heat exchange assembly which comprises a first heat exchange pipeline; the condensation heat exchange assembly comprises a second heat exchange pipeline, the second heat exchange pipeline is provided 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 sequentially arranged in the first direction, and the second heat exchange pipeline is provided with a water inlet part and a water outlet part; the first heat exchange pipeline is provided with a water inlet end and a water outlet end, the water inlet part and the water outlet part face the same side of the heat exchanger in the second direction, and the water outlet part communicates with the water inlet end of the first heat exchange pipeline; the first direction intersects with the second direction. According to the technical scheme, the heat exchange efficiency of the heat exchanger can be guaranteed, meanwhile, the size of the heat exchanger is reduced, and whole machine installation is facilitated.

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] The existing water heater includes a heat exchanger, which can be used for heat exchange between a heat exchange medium and external air, or for heat exchange between two heat exchange media. In order to improve the heat exchange efficiency, the condensation heat exchange pipeline of the existing heat exchanger is usually arranged from one side to the other side in sequence, that is, the water inlet and the water outlet of the condensation heat exchange pipeline are arranged on different sides. However, this pipe arrangement will make the heat exchanger larger in size, which is not convenient for the installation of the whole water heater. Utility Model Content

[0003] The main purpose of the utility model is to provide a heat exchanger and a water heater, aiming to ensure the heat exchange efficiency of the heat exchanger, while reducing the volume of the heat exchanger to facilitate installation of the whole machine.

[0004] In order to achieve the above object, the utility model provides a heat exchanger, comprising:

[0005] A main heat exchange assembly includes a first heat exchange pipeline; and

[0006] 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 inlet end and the water outlet end of the first heat exchange pipeline, the water inlet and the water outlet are on the same side of the heat exchanger in the second direction, and the water outlet is connected to the water inlet end of the first heat exchange pipeline; the first direction intersects with the second direction.

[0007] In one embodiment, the heat exchanger also includes a first end plate and a second end plate arranged opposite to each other along a second direction, the first heat exchange pipeline and the second heat exchange pipeline are installed between the first end plate and the second end plate, the first end plate is provided with a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole, the water inlet end and the water outlet end of the first heat exchange pipeline are respectively passed through the first mounting hole and the second mounting hole, and the water inlet part and the water outlet part are respectively passed through the third mounting hole and the fourth mounting hole.

[0008] In one embodiment, the first end plate has a first side edge and a second side edge opposite to each other along a third direction, the first mounting hole and the fourth mounting hole are arranged along the first direction and disposed close to the first side edge, and the second mounting hole and the third mounting hole are arranged along the first direction and disposed close to the second side edge.

[0009] In one embodiment, the heat exchanger further 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 pipe, and the bypass pipe is connected to the inlet pipe and the outlet pipe.

[0010] In one embodiment, the first heat exchange pipeline includes a plurality of first heat exchange tubes extending along the second direction, the plurality of first heat exchange tubes are arranged at intervals and connected along the third direction, and 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.

[0011] In one embodiment, the water inlet is located at the first heat exchange layer, the water outlet is located at the second heat exchange layer, 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 of the same heat exchange layer are arranged at intervals along the third direction, the number of second heat exchange tubes of the first heat exchange layer is the same as the number of second heat exchange tubes of the second heat exchange layer, the second heat exchange tubes of the first heat exchange layer and the second heat exchange tubes of the second heat exchange layer are staggered; the first direction, the second direction, and the third direction intersect each other.

[0012] 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 connected, so that the second heat exchange pipeline is a spiral coil structure that is spirally coiled and extends along the third direction.

[0013] In one embodiment, the second heat exchange pipeline is formed by integrally winding a single tube.

[0014] In one embodiment, the condensing heat exchange component is located below the main heat exchange component and downstream of the main heat exchange component in the flue gas flow direction.

[0015] The utility model also provides a water heater, comprising the heat exchanger as described above.

[0016] The technical solution of the utility model integrates the main heat exchange component and the condensing heat exchange component into one heat exchanger, and realizes two-stage heat exchange through the integrated heat exchanger, so that the overall structure of the heat exchanger is simpler and more compact, which is conducive to reducing the volume; the second heat exchange pipeline of the condensing heat exchange component constructs the first heat exchange layer and the second heat exchange layer. In actual application, the burner of the water heater can be arranged on the side of the main heat exchange component away from the condensing heat exchange component, and the high-temperature flue gas generated by the combustion of the burner can pass through the main heat exchange component, the first heat exchange layer and the second heat exchange layer in sequence for heat exchange; the water inlet end and the water outlet end, the water inlet part and the water outlet part of the first heat exchange pipeline are facing the same side of the heat exchanger in the length direction. In actual application, the water inlet pipe and the water outlet pipe of the water heater, and the connecting pipe for connecting the main heat exchange component and the condensing heat exchange component can be arranged on the same side of the heat exchanger in the length direction, thereby compressing the volume of the heat exchanger in the length direction, which is convenient for the installation of the heat exchanger as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic structural diagram of an embodiment of a heat exchanger provided by the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the heat exchanger from another angle;

[0021] Figure 3 for Figure 1 The main view of the heat exchanger;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure.

[0023] Description of Figure Numbers:

[0024] 100, heat exchanger; 10, main heat exchange component; 11, first heat exchange pipeline; 111, first heat exchange tube; 112, water inlet; 113, water outlet; 12, fin group; 121, fin; 20, condensing heat exchange component; 20a, first heat exchange layer; 20b, second heat exchange layer; 21, second heat exchange pipeline; 211, water inlet; 212, water outlet; 213, second heat exchange tube; 30, first end plate; 31, first mounting hole; 32, second mounting hole; 33, third mounting hole; 34, fourth mounting hole; 35, first side edge; 36, second side edge; 40, second end plate; 50, water inlet pipe; 60, water outlet pipe; 70, bypass pipe; 80, connecting pipe.

[0025] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] The existing water heater includes a heat exchanger, which can be used for heat exchange between a heat exchange medium and external air, or for heat exchange between two heat exchange media. In order to improve the heat exchange efficiency, the condensation heat exchange pipeline of the existing heat exchanger is usually arranged from one side to the other side in sequence, that is, the water inlet and the water outlet of the condensation heat exchange pipeline are arranged on different sides. However, this pipe arrangement will make the heat exchanger larger in size, which is not convenient for the installation of the whole water heater.

[0030] Based on this, the utility model proposes a heat exchanger 100, which aims to ensure the heat exchange efficiency of the heat exchanger 100, while reducing the volume of the heat exchanger 100 to facilitate the installation of the whole machine.

[0031] See also Figures 1 to 4 In one embodiment of the utility model, the heat exchanger 100 includes a main heat exchange component 10 and a condensing heat exchange component 20. The main heat exchange component 10 includes a first heat exchange pipeline 11; the condensing heat exchange component 20 includes a second heat exchange pipeline 21, the second heat exchange pipeline 21 is configured with a first heat exchange layer 20a and a second heat exchange layer 20b, the first heat exchange pipeline 11, the first heat exchange layer 20a and the second heat exchange layer 20b are arranged in sequence along a first direction, the second heat exchange pipeline 21 has a water inlet 211 and a water outlet 212, the water inlet end 112 and the water outlet end 113 of the first heat exchange pipeline 11, the water inlet 211, and the water outlet 212 are on the same side of the heat exchanger 100 in the second direction, and the water outlet 212 is connected to the water inlet end 112 of the first heat exchange pipeline 11; the first direction intersects with the second direction.

[0032] The heat exchanger 100 includes a main heat exchange component 10 and a condensing heat exchange component 20. When applied to a water heater, the burner of the water heater can be arranged on a side of the main heat exchange component 10 away from the condensing heat exchange component 20, so that the condensing heat exchange component 20 is located downstream of the main heat exchange component 10 in the flue gas flow direction. In this way, the high-temperature flue gas generated by the burner combustion flows toward the heat exchanger 100, and the high-temperature flue gas first passes through the surface of the main heat exchange component 10 for heat exchange, and then passes through the surface of the condensing heat exchange component 20 for condensation heat exchange; the second heat exchange pipeline 21 introduces cold water through the water inlet 211. For example, the water inlet 211 can be connected to the water inlet pipe 50 of the heat exchanger 100, and the external cold water can be transported to the second heat exchange pipeline 21 by the water inlet 211 for preheating. The preheated water is then transported to the first heat exchange pipeline 11 by the water outlet 212 to be heated again and output as hot water.

[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. The first direction may be the height direction of the heat exchanger 100 (e.g., the up-down direction). The main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b may be arranged in sequence from top to bottom. Accordingly, when applied, the burner may be arranged above the main heat exchange component 10. During the process of flue gas flowing from top to bottom, the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b may be sequentially exchanged. Alternatively, the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b may be arranged in sequence from bottom to top. Accordingly, when applied, the burner may be arranged below the main heat exchange component 10. During the process of flue gas flowing from bottom to top, the main heat exchange component 10, the first heat exchange layer 20a and the second heat exchange layer 20b may be sequentially exchanged.

[0034] It should be noted that the water inlet 112 and the water outlet 113 of the first heat exchange pipeline 11, and the water inlet 211 and the water outlet 212 of the second heat exchange pipeline 21 are facing the same side of the heat exchanger 100 in the second direction, and the water outlet 212 is connected to the water inlet 112. The second direction may be the length direction of the heat exchanger 100 (e.g., the left-right direction). However, no matter how the first heat exchange pipeline 11 and the second heat exchange pipeline 21 are wound, in actual application, the water inlet pipe 50, the water outlet pipe 60 of the water heater, and the connecting pipe 80 for connecting the main heat exchange component 10 and the condensing heat exchange component 20 can be arranged on one side of the heat exchanger 100 in the length direction, thereby compressing the volume of the heat exchanger 100 in the length direction, which is convenient for the installation of the heat exchanger 100 as a whole.

[0035] The technical solution of the utility model integrates the main heat exchange component 10 and the condensing heat exchange component 20 into a heat exchanger 100, and realizes two-stage heat exchange through the integrated heat exchanger 100, so that the overall structure of the heat exchanger 100 is simpler and more compact, which is conducive to reducing the volume; the second heat exchange pipeline 21 of the condensing heat exchange component 20 constructs the first heat exchange layer 20a and the second heat exchange layer 20b. In actual application, the burner of the water heater can be arranged on the side of the main heat exchange component 10 away from the condensing heat exchange component 20, and the high-temperature flue gas generated by the combustion of the burner can pass through the main heat exchange component in sequence. 10. The first heat exchange layer 20a and the second heat exchange layer 20b exchange heat; the water inlet end 112 and the water outlet end 113, the water inlet portion 211, and the water outlet portion 212 of the first heat exchange pipeline 11 are oriented toward the same side of the heat exchanger 100 in the length direction. In actual application, the water inlet pipe 50 and the water outlet pipe 60 of the water heater, as well as the connecting pipe 80 for connecting the main heat exchange component 10 and the condensing heat exchange component 20 can be arranged on the same side of the heat exchanger 100 in the length direction, thereby compressing the volume of the heat exchanger 100 in the length direction, which is convenient for the installation of the heat exchanger 100 as a whole.

[0036] like Figure 1 and Figure 2 As shown, in one embodiment, the heat exchanger 100 also includes a first end plate 30 and a second end plate 40 arranged relatively to each other along a second direction, the first heat exchange pipeline 11 and the second heat exchange pipeline 21 are installed between the first end plate 30 and the second end plate 40, the first end plate 30 is provided with a first mounting hole 31, a second mounting hole 32, a third mounting hole 33 and a fourth mounting hole 34, the water inlet end 112 and the water outlet end 113 of the first heat exchange pipeline 11 are respectively penetrated through the first mounting hole 31 and the second mounting hole 32, the water inlet part 211 and the water outlet part 212 are respectively penetrated through the third mounting hole 33 and the fourth mounting hole 34.

[0037] In this embodiment, the first heat exchange pipeline 11 and the second heat exchange pipeline 21 are installed and fixed by sharing the first end plate 30 and the second end plate 40, which is beneficial to simplify the structure of the heat exchanger 100, save materials, reduce costs, and reduce the volume of the heat exchanger 100. Furthermore, on the basis of realizing the installation of the first heat exchange pipeline 11 and the second heat exchange pipeline 21, by setting the first mounting hole 31, the second mounting hole 32, the third mounting hole 33 and the fourth mounting hole 34 on the first end plate 30, the water inlet end 112 and the water outlet end 113 of the first heat exchange pipeline 11 are respectively penetrated through the first mounting hole 31 and the second mounting hole 32, and the water inlet part 211 and the water outlet part 212 of the second heat exchange pipeline 21 are respectively penetrated through the third mounting hole 33 and the fourth mounting hole 34, so that the water inlet end 112 and the water outlet end 113, the water inlet part 211 and the water outlet part 212 are arranged on the first end plate 30, that is, the water inlet pipe 50 and the water outlet pipe 60 of the water heater, and the connecting pipe 80 for connecting the main heat exchange component 10 and the condensing heat exchange component 20 are arranged on the same end plate, so as to realize the concentration of the pipelines and further compress the volume of the heat exchanger 100 in the length direction, so as to facilitate its installation on the water heater.

[0038] On the basis of the above embodiment, in order to further reduce the volume of the heat exchanger 100, as Figure 1 and Figure 2 As shown, in one embodiment, the first end plate 30 has a first side edge 35 and a second side edge 36 opposite to each other along a third direction, the first mounting hole 31 and the fourth mounting hole 34 are arranged along the first direction and are disposed close to the first side edge 35, and the second mounting hole 32 and the third mounting hole 33 are arranged along the first direction and are disposed close to the second side edge 36.

[0039] In this embodiment, the third direction may be the width direction (e.g., the front-to-back direction) of the heat exchanger 100. By arranging the first mounting hole 31 and the fourth mounting hole 34 along the first direction and disposed close to the first side edge 35, that is, arranging the water inlet end 112 of the first heat exchange pipeline 11 and the water outlet 212 of the second heat exchange pipeline 21 along the first direction and disposed close to the first side edge 35, since the water outlet 212 is connected to the water inlet end 112, the length of the connecting pipe 80 connecting the two can be shortened, thereby reducing the volume of the heat exchanger 100. Furthermore, by arranging the second mounting hole 32 and the third mounting hole 33 along the first direction and setting them close to the second side edge 36, that is, arranging the water outlet end 113 of the first heat exchange pipeline 11 and the water inlet part 211 of the second heat exchange pipeline 21 along the first direction and setting them close to the second side edge 36, since the water outlet end 113 can be connected to the water outlet pipe 60 of the water heater, and the water inlet part 211 can be connected to the water inlet pipe 50 of the water heater, the water outlet pipe 60 and the water outlet pipe 60 can be arranged on the second side edge 36, and the connecting pipe 80 connecting the water outlet part 212 and the water inlet end 112 is arranged on the first side edge 35, thereby realizing a reasonable layout of the water inlet pipe 50, the water outlet pipe 60 and the connecting pipe 80 in the width direction, further compressing the volume of the heat exchanger 100 in the width direction, and making it more convenient to install it on the water heater.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the heat exchanger 100 also includes an inlet pipe 50, an outlet pipe 60 and a bypass pipe 70, the inlet pipe 50 is connected to the water inlet part 211, the outlet pipe 60 is connected to the water outlet end 113 of the first heat exchange pipe 111, and the bypass pipe 70 is connected to the inlet pipe 50 and the outlet pipe 60.

[0041] In this embodiment, when the heat exchanger 100 is working, external cold water can be transported to the second heat exchange pipe 213 through the water inlet pipe 50 for preheating, and then transported to the first heat exchange pipeline 11 through the water outlet 212 for further heating, and the heated hot water is output from the water outlet pipe 60. When the water inlet pipe 50 outputs cold water, a part of the cold water in the water inlet pipe 50 can flow to the water outlet pipe 60 through the bypass pipe 70 and then be output, thereby reducing the cold water capacity entering the first heat exchange layer 20a and increasing the water temperature inside the first heat exchange layer 20a. After the high-temperature flue gas exchanges heat with the main heat exchange component 10, it passes through the first heat exchange layer 20a and the second heat exchange layer 20b in sequence, that is, the flue gas temperature in contact with the first heat exchange layer 20a is higher, and the flue gas temperature in contact with the second heat exchange layer 20b is relatively low. Even if the temperature of the flue gas in contact with the first heat exchange layer 20a is high, the water temperature inside the first heat exchange layer 20a is also relatively high, so that a large temperature difference can still be maintained between the high-temperature flue gas and the high-temperature water in the first heat exchange layer 20a to achieve effective heat exchange, thereby improving the condensation heat exchange efficiency. In addition, since the water outlet end 113 of the first heat exchange pipeline 11 and the water inlet 211 of the second heat exchange pipeline 21 face the same side of the heat exchanger 100 in the length direction, that is, the water outlet pipe 60 and the water inlet pipe 50 are arranged on the same side of the heat exchanger 100 in the length direction, on the basis of this structure, the bypass pipe 70 for improving the condensation heat exchange efficiency is connected to the water inlet pipe 50 and the water outlet pipe 60, even if the bypass pipe 70 is added, the volume of the heat exchanger 100 will not be increased too much.

[0042] like Figures 1 to 4 As shown, in one 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 connected along the third direction, and the main heat exchange component 10 also includes a fin group 12 sleeved on the periphery of the plurality of first heat exchange tubes 111; the first direction, the second direction, and the third direction intersect each other.

[0043] In this embodiment, the main heat exchange component 10 is implemented by a tube-fin heat exchange structure. A plurality of first heat exchange tubes 111 are arranged to extend along the second direction. The second direction is the length direction of the heat exchanger 100 (e.g., the left-right direction). The plurality of first heat exchange tubes 111 can be connected in series or in parallel to form a first heat exchange pipeline 11. The plurality of first heat exchange tubes 111 can be arranged in a third direction into one layer, two layers or more. The third direction is the width direction of the heat exchanger 100 (e.g., the front-back direction). Optionally, the plurality of first heat exchange tubes 111 are arranged in a single-layer structure at intervals along the third direction, and the plurality of first heat exchange tubes 111 can be connected in series through connecting bends to form a first heat exchange pipeline 11 that is extended in a circuitous manner. The fin group 12 includes a plurality of fins 121, and the plurality of fins 121 are arranged in the second direction to form the fin group 12, and each fin 121 is provided with a plurality of perforations, wherein the number of perforations matches the number of the first heat exchange tubes 111.

[0044] For example, Figure 4 As 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 perforations arranged in a single row along the third direction. The first heat exchange tubes 111 are interlaced and matched with the perforations on the fins 121 in a one-to-one correspondence. Of course, the number of first heat exchange tubes 111 is not limited to four, for example, it can also be three, five or more. A gap for 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 realize the heating of the water in the first heat exchange tubes 111, which can effectively improve the heat exchange efficiency.

[0045] like Figures 1 to 4 As shown, in one embodiment, the water inlet 211 is located in the first heat exchange layer 20a, the water outlet 212 is located in the second heat exchange layer 20b, 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 arranged with the second heat exchange tubes 213, and the plurality of second heat exchange tubes 213 of the same heat exchange layer are arranged at intervals along the third direction, the number of the second heat exchange tubes 213 of the first heat exchange layer 20a is the same as the number of the second heat exchange tubes 213 of the second heat exchange layer 20b, and 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 staggered; the first direction, the second direction, and the third direction intersect each other.

[0046] 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 be extended along the second direction. 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 second heat exchange tubes 213 located at the outermost sides of 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 of the first heat exchange layer 20a is equal to the number of the second heat exchange tubes 213 of 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 tube 213 of the first heat exchange layer 20a is staggered with the second heat exchange tube 213 of the second heat exchange layer 20b. For example, the second heat exchange tube 213 of 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. This can avoid the complete overlap of the projections of the second heat exchange tubes 213 of the two adjacent heat exchange layers in the direction of flue gas flow, so that the flue gas can fully contact the surface of the second heat exchange tube 213 of each heat exchange layer for heat exchange during the flow process, so as to improve the heat exchange efficiency; in addition, the condensed water generated on the surface of the second heat exchange tube 213 of the upper heat exchange layer can also drip downward from the gap between the two adjacent second heat exchange tubes 213 of the lower heat exchange layer, ensuring that the condensed water can be discharged smoothly.

[0047] For example, Figure 4 As shown, the first heat exchange layer 20a includes 6 second heat exchange tubes 213 arranged at intervals along the third direction, and the second heat exchange layer 20b includes 6 second heat exchange tubes 213 arranged at intervals along the third direction. Of course, the number of second heat exchange tubes 213 of the first heat exchange layer 20a and the second heat exchange layer 20b is not limited thereto, and can be set according to actual needs. Taking the first heat exchange layer 20a as an example, the width of the first heat exchange layer 20a is equal to the width of the second heat exchange layer 20b, and 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 completely staggered, so that the cross-section of the second heat exchange pipeline 21 parallel to the flue gas flow direction generally presents a parallelogram structure with the same width from top to bottom, thereby avoiding the complete overlap of the projections of the second heat exchange layers 20b of the two adjacent heat exchange layers 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.

[0048] In one embodiment, the second heat exchange tube 213 can be implemented by a light tube. The surface of the light tube is smoother, which is conducive to the rapid dripping of condensed water and avoids condensed water blockage. Alternatively, the second heat exchange tube 213 can also be implemented by a corrugated tube. Compared with a light tube, the folds on the surface of the corrugated tube can increase the heat exchange area, so that when the length of the second heat exchange pipeline 21 is the same, the heat exchange efficiency can be improved. Alternatively, when the same heat exchange efficiency is achieved, the length of the second heat exchange pipeline 21 can be shortened to save materials and reduce costs. In addition, compared with finned tubes, the folds on the surface of the corrugated tube are shallower and are not easy to accumulate condensed water, thus avoiding condensed water blockage.

[0049] like Figure 1 and Figure 2 As 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 connected so that the second heat exchange pipeline 21 is a spiral coil structure that is spirally coiled and extends along the third direction.

[0050] In this embodiment, the water inlet 211 is used as the starting end to form a section of pipeline in the second heat exchange layer 20b, and then extends to the first heat exchange layer 20a to form another section of pipeline, and then extends to the second heat exchange layer 20b to form another section of pipeline, and then extends to the first heat exchange layer 20a to form another section of pipeline to form the water outlet 212. It can be seen that the second heat exchange tube 213 of the first heat exchange layer 20a and the second heat exchange tube 213 of the second heat exchange layer 20b are alternately connected to form a second heat exchange pipeline 21 that is spirally coiled and extends along the third direction.

[0051] In one embodiment, the second heat exchange pipeline 21 is formed by winding a single pipe in one piece, so that 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 ​​through multiple pipes, which can reduce the risk of water leakage.

[0052] like Figure 1 As shown, in one embodiment, the condensing heat exchange component 20 is located below the main heat exchange component 10 and downstream of the main heat exchange component 10 in the flue gas flow direction.

[0053] In this embodiment, the condensing heat exchange component 20 is located below the main heat exchange component 10. When applied to a water heater, the burner of the water heater can be arranged above the main heat exchange component 10, so that the condensing heat exchange component 20 is located downstream of the main heat exchange component 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 component 10 for main heat exchange, and then passes through the condensing heat exchange component 20 for condensation heat exchange. The flue gas temperature after heat exchange with the main heat exchange component 10 is generally higher than the flue gas dew point temperature by a certain margin, and condensed water will not be generated on the surface of the main heat exchange component 10. Therefore, even if the main heat exchange component 10 adopts a tube-fin heat exchange structure, there will be no problem of condensed water accumulating in the gap between the fins 121 and causing condensed water blockage. The condensing heat exchange component 20 adopts a tubular heat exchange structure, and there are no fins 121 on the periphery of 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 to avoid the accumulation of condensed water in the gaps between the fins 121 and the occurrence of condensed water blockage. The condensing heat exchange component 20 is located below the main heat exchange component 10. The condensed water generated on the surface of the condensing heat exchange component 20 can drip downward under the action of gravity, but will not drip onto the surface of the main heat exchange component 10 and affect the main heat exchange efficiency.

[0054] The 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 the water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0055] The water heater further includes components such as a burner and a fan. The burner can be arranged on the side of the main heat exchange component 10 away from the condensing heat exchange component 20. The fan is used to drive the airflow from the burner to the heat exchanger 100, so that the high-temperature flue gas generated by the burner can pass through the main heat exchange component 10 and the condensing heat exchange component 20 in sequence for heat exchange. For example, the fan, the burner and the heat exchanger 100 can be arranged in sequence from top to bottom. When the water heater is working, the fan can drive the airflow from the burner to flow from top to bottom toward the heat exchanger 100, so that the high-temperature flue gas generated by the burner combustion flows from top to bottom, and passes through the main heat exchange component 10 and the condensing heat exchange component 20 of the heat exchanger 100 in sequence to achieve two-stage heat exchange. Alternatively, the fan, burner and heat exchanger 100 may be arranged sequentially from bottom to top, with the fan driving the airflow to flow from the burner toward the heat exchanger 100 from bottom to top, so that the high-temperature flue gas generated by the burner flows from bottom to top, passing through the main heat exchange component 10 and the condensing heat exchange component 20 of the heat exchanger 100 in sequence to realize two-stage heat exchange.

[0056] The above descriptions are only some embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are 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; as well as 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 inlet end and the water outlet end of the first heat exchange pipeline, the water inlet and the water outlet are on the same side of the heat exchanger in the second direction, and the water outlet is connected to the water inlet end of the first heat exchange pipeline; the first direction intersects with the second direction.

2. The heat exchanger according to claim 1, characterized in that The heat exchanger also includes a first end plate and a second end plate arranged opposite to each other in a second direction, the first heat exchange pipeline and the second heat exchange pipeline are installed between the first end plate and the second end plate, the first end plate is provided with a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole, the water inlet end and the water outlet end of the first heat exchange pipeline are respectively passed through the first mounting hole and the second mounting hole, and the water inlet part and the water outlet part are respectively passed through the third mounting hole and the fourth mounting hole.

3. The heat exchanger according to claim 2, characterized in that The first end plate has a first side edge and a second side edge opposite to each other along a third direction, the first mounting hole and the fourth mounting hole are arranged along the first direction and are disposed close to the first side edge, and the second mounting hole and the third mounting hole are arranged along the first direction and are disposed close to the second side edge.

4. The heat exchanger according to claim 1, characterized in that The heat exchanger further includes a water inlet pipe, a water outlet pipe and a bypass pipe, the water inlet pipe is connected to the water inlet part, the water outlet pipe is connected to the water outlet end of the first heat exchange pipe, and the bypass pipe is connected to the water inlet pipe and the water outlet pipe.

5. 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.

6. The heat exchanger according to claim 1, characterized in that The water inlet is located in the first heat exchange layer, the water outlet is located in the second heat exchange layer, 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 and the second heat exchange tubes in the second heat exchange layer are staggered; the first direction, the second direction, and the third direction intersect each other.

7. The heat exchanger according to claim 6, 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.

8. The heat exchanger according to claim 7, characterized in that The second heat exchange pipeline is formed by integrally winding a single pipe.

9. The heat exchanger according to any one of claims 1 to 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 flue gas flow direction.

10. A water heater, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.

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