Condensation type water heater

Abstract

The utility model discloses a condensation type water heater which comprises a shell, a combustor, a first-stage heat exchanger and a second-stage heat exchanger, the combustor is arranged in the shell and provided with a combustion cavity, the first-stage heat exchanger is arranged on the shell and located above the combustor, the first-stage heat exchanger comprises a first heat exchange cavity and a first heat exchange pipe, the first heat exchange pipe is arranged in the first heat exchange cavity, and the second heat exchange pipe is arranged in the second heat exchange cavity. The first heat exchange cavity is communicated with the combustion cavity, a communication opening is formed in the top of the first heat exchange cavity, the second-stage heat exchanger is arranged in the shell and located above the first-stage heat exchanger, the second-stage heat exchanger comprises a second heat exchange cavity and a second heat exchange pipe, the second heat exchange pipe is arranged in the second heat exchange cavity and connected with the first heat exchange pipe, and the communication opening is formed close to one side of the shell. A smoke inlet is formed in the side wall, close to the communicating opening, of the second heat exchange cavity, a smoke outlet is formed in the top of the second heat exchange cavity and is away from one side of the smoke inlet, and the smoke inlet can communicate with the communicating opening. Heat loss can be reduced, and heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to water heaters, and in particular to a condensing water heater. Background Art

[0002] A gas water heater uses gas as fuel, transferring heat through combustion and heating to cold water flowing through a heat exchanger to produce hot water. Condensing gas water heaters are currently available. Compared to conventional gas water heaters, these feature a secondary condensing heat exchanger, enabling them to utilize flue gas for heating. However, since condensed water is produced during heat exchange in the secondary heat exchanger and cannot enter the burner, an adapter component is required to connect the secondary and primary heat exchangers, resulting in some heat loss and reduced heat exchange efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a condensing water heater that can reduce heat loss in the water heater and improve heat exchange efficiency.

[0004] 14. The heat exchanger as claimed in claim 13, wherein the heat exchanger is arranged in a direction of advancing the heat exchanger from the front of the casing to the rear of the casing, wherein the heat exchanger is arranged in a direction of advancing the heat exchanger from the front of the casing to the rear of the casing.

[0005] A condensing water heater according to an embodiment of the present invention has at least the following beneficial effects: the burner combustion chamber first directly heats the first heat exchange tube in the first heat exchange chamber, and the combustion flue gas is output through the connecting port, and the connecting port is set to one side so that it can correspond to the smoke inlet located on the side wall to reduce the resistance of the smoke flow and reduce heat loss. After the smoke enters from the smoke inlet on the side, it flows out from the smoke exhaust port on the other side, wherein the smoke can fully pass through the second heat exchange tube for heat exchange, and the heat exchange efficiency is high, and the condensed water generated by the second heat exchange tube will fall into the bottom of the second heat exchange chamber, and cannot flow out from the smoke exhaust port on the side wall. Through the above structure, it is possible to block the condensed water, reduce the smoke flow resistance, reduce heat loss, and improve the heat exchange efficiency.

[0006] According to some embodiments of the present invention, a guide portion is provided on the top of the first heat exchange chamber, and the guide portion is inclined from bottom to top toward the communication port.

[0007] According to some embodiments of the present invention, the secondary heat exchanger also includes a box body, which has a cavity. A vertical partition is provided in the box body, and the partition is used to separate the cavity into a second heat exchange cavity and a flue gas channel. The partition is provided with the smoke inlet to connect the second heat exchange cavity with the flue gas channel, and the flue gas channel is connected with the connecting port.

[0008] According to some embodiments of the present invention, the first heat exchange tube is configured as a series heat exchange tube, and the second heat exchange tube is configured as a parallel heat exchange tube. One end of the series heat exchange tube is used to be connected to an external water inlet pipe, and the other end is connected to the parallel heat exchange tube. The other end of the parallel heat exchange tube is used to be connected to an external water outlet pipe.

[0009] According to some embodiments of the present invention, the parallel heat exchange tubes include a water inlet chamber, a water outlet chamber and multiple branch heat exchange tubes, one end of the branch heat exchange tubes is connected to the water inlet chamber, and the other end is connected to the water outlet chamber, the first heat exchange tube is connected to the water inlet chamber, and the water outlet chamber is used to connect to an external water outlet pipe.

[0010] According to some embodiments of the present invention, the branch heat exchange tubes are serpentine-shaped and extend in a zigzag manner in the transverse direction, and the branch heat exchange tubes are arranged at intervals in the vertical direction.

[0011] According to some embodiments of the present invention, the upper and lower adjacent branch heat exchange tubes are staggered.

[0012] According to some embodiments of the present invention, the series heat exchange tubes include a plurality of straight tubes and a plurality of connecting elbows, the straight tubes are arranged at intervals, and the connecting elbows can connect two of the straight tubes and connect the straight tubes in series.

[0013] According to some embodiments of the present invention, several of the straight tubes are arranged transversely at intervals to form a first layer tube group, and several of the straight tubes are arranged transversely at intervals to form a second layer tube group. The first layer tube group and the second layer tube group are arranged up and down, and the straight tubes of the first layer tube group and the second layer tube group are staggered. One end of the connecting elbow is connected to the straight tubes of the first layer tube group, and the other end is connected to the straight tubes of the second layer tube group.

[0014] According to some embodiments of the present invention, a fan is further included. The fan is arranged in the shell and connected to the burner. The fan can blow air toward the combustion chamber to the first heat exchange chamber and the second heat exchange chamber.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of the hidden front panel of the embodiment of the utility model;

[0018] Figure 2 are cross-sectional views of some embodiments of the present invention;

[0019] Figure 3 This is a cross-sectional view of some embodiments of the present invention after the housing is hidden;

[0020] Figure 4 This is an exploded view of some embodiments of the present invention after the housing is hidden;

[0021] Figure 5 This is the box structure diagram.

[0022] Reference numerals:

[0023] Housing 100;

[0024] Burner 200, combustion chamber 210;

[0025] The primary heat exchanger 300, the first heat exchange chamber 310, the communication port 311, the guide portion 312, the series heat exchange tubes 320, the straight tubes 321, and the connecting elbow 322;

[0026] Secondary heat exchanger 400, second heat exchange chamber 410, smoke inlet 411, smoke exhaust port 412, housing 420, baffle 421, smoke channel 422, parallel heat exchange tubes 430, water inlet chamber 431, water outlet chamber 432, branch heat exchange tubes 433;

[0027] Fan 500. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Reference Figures 1 to 4According to the first embodiment of the present invention, a condensing water heater includes a housing 100, a burner 200, a primary heat exchanger 300, and a secondary heat exchanger 400. The burner 200 is disposed in the housing 100. The burner 200 has a combustion chamber 210. The primary heat exchanger 300 is disposed in the housing 100 and is located above the burner 200. The primary heat exchanger 300 includes a first heat exchange chamber 310 and a first heat exchange tube. The first heat exchange tube is disposed in the first heat exchange chamber 310. The first heat exchange chamber 310 is connected to the combustion chamber 210. The top of the first heat exchange chamber 310 is provided with a connecting port. 311. The secondary heat exchanger 400 is arranged in the shell 100 and above the primary heat exchanger 300. The secondary heat exchanger 400 includes a second heat exchange chamber 410 and a second heat exchange tube. The second heat exchange tube is arranged in the second heat exchange chamber 410 and is connected to the first heat exchange tube. The connecting port 311 is arranged near one side of the shell 100. A smoke inlet 411 is provided on the side wall of the second heat exchange chamber 410 near the connecting port 311. A smoke exhaust port 412 is provided on the top of the second heat exchange chamber 410. The smoke exhaust port 412 is arranged away from the side of the smoke inlet 411, and the smoke inlet 411 can be connected to the connecting port 311. The combustion chamber 210 of the burner 200 first directly heats the first heat exchange tube in the first heat exchange chamber 310, and the combustion flue gas is output through the connecting port 311. The connecting port 311 is set to one side so that it can correspond to the smoke inlet 411 located on the side wall to reduce the resistance of the smoke flow and reduce heat loss. After the smoke enters from the smoke inlet 411 on the side, it flows out from the smoke exhaust port 412 on the other side, wherein the smoke can fully pass through the second heat exchange tube for heat exchange, and the heat exchange efficiency is high. The condensed water generated by the second heat exchange tube will fall into the bottom of the second heat exchange chamber 410, and cannot flow out from the smoke exhaust port 412 on the side wall. Through the above structure, it can not only block the condensed water, but also reduce the smoke flow resistance, reduce heat loss, and improve the heat exchange efficiency.

[0032] Specifically, the burner 200 is arranged at the lower part of the shell 100, and the combustion chamber 210 of the burner 200 is directly connected to the first heat exchange chamber 310 of the first-level heat exchanger 300 to directly heat the first heat exchange tube of the first heat exchange chamber 310. The specific structure of the first heat exchange tube is not limited here. The cold water in the first heat exchange tube flows to the second heat exchange tube of the secondary heat exchanger 400 after heat exchange, and the secondary heat exchanger 400 is arranged above the first-level heat exchanger 300. The smoke inlet 411 of the second heat exchange chamber 410 is arranged on the side wall, so that the bottom wall of the first heat exchange chamber 310 forms a trough body, which can accumulate condensed water. It can be understood Yes, a drain pipe can be provided on the bottom wall of the second heat exchange chamber 410 to drain the condensed water, and the connecting port 311 is at the top of the first heat exchange chamber 310 and is provided close to one side, so that the connecting port can be close to the smoke inlet 411, so as to shorten the flow distance of the smoke and reduce the resistance, thereby reducing heat loss and improving the heat exchange efficiency. After the smoke enters the second heat exchange chamber 410, it can be discharged through the smoke exhaust port 412. The flow direction of the smoke is guided by the position of the smoke inlet 411 and the smoke exhaust port 412, so that the smoke can fully pass through the second heat exchange chamber 410 to fully exchange heat with the second heat exchange tube, and the heat exchange efficiency is high.

[0033] Reference Figure 2 and Figure 4 In some embodiments of the present invention, a guide portion 312 is provided at the top of the first heat exchange chamber 310. The guide portion 312 is inclined from bottom to top toward the communication port 311. Specifically, the guide portion 312 can be configured as an inclined guide plate. The guide portion 312 can guide the flue gas toward the communication port 311 to reduce the flow resistance of the flue gas and facilitate the flow of the flue gas to the second heat exchange chamber 410 for heating.

[0034] Reference Figures 2 to 5 In some embodiments of the present invention, the secondary heat exchanger 400 further includes a box body 420, which has a cavity therein. A vertical partition 421 is provided in the box body 420, and the partition 421 is used to separate the cavity into a second heat exchange cavity 410 and a smoke channel 422. The partition 421 is provided with a smoke inlet 411 to connect the second heat exchange cavity 410 with the smoke channel 422, and the smoke channel 422 is connected to the connecting port 311. Specifically, the box body 420 is installed above the first-stage heat exchanger 300, and the partition 421 can be separated on the side of the box body 420 close to the connecting port 311, so that the separated flue gas channel 422 can be connected with the connecting port 311, and the second heat exchange chamber 410 can also be divided larger. The bottom of the flue gas channel 422 has a through hole connected with the connecting port 311. By arranging the smoke inlet 411 on the partition 421, the partition 421 can be used to separate the condensed water, so that the condensed water cannot easily flow into the flue gas channel 422 from the smoke inlet 411, and the above structure is relatively simple and can be easily assembled.

[0035] Reference Figures 2 to 4In some embodiments of the present invention, the first heat exchange tube is configured as a series heat exchange tube 320, and the second heat exchange tube is configured as a parallel heat exchange tube 430. One end of the series heat exchange tube 320 is used to connect to an external water inlet pipe, and the other end is connected to the parallel heat exchange tube 430. The other end of the parallel heat exchange tube 430 is used to connect to an external water outlet pipe. Specifically, the first heat exchange tube is configured as a series pipe arrangement, one end is connected to the water inlet pipe, and the other end is upwardly connected to the parallel heat exchange tube 430 of the secondary heat exchanger 400. External cold water enters the series heat exchange tube 320 from the water inlet pipe for heat exchange. Since the first heat exchange chamber 310 has a large amount of heat and the fluid flow rate in the series pipe is fast, the cold water in the pipe can transfer the heat away in time. After the fluid enters the secondary heat exchanger 400, since the secondary heat exchanger 400 is located above the primary heat exchanger 300, it uses flue gas for heat exchange, and the temperature is lower than that of the primary heat exchanger 300. After the series heat exchange pipe 320 is connected to the parallel heat exchange pipe 430, the parallel heat exchange pipe 430 is a parallel pipe arrangement method, which can divert the main pipe of the series output to multiple branch pipes. The branch pipes can be set thinner to expand the heat exchange area. It can be understood that the fluid flow rate of each branch can be reduced, thereby extending the heating time, so that the flue gas temperature can be more fully utilized. Finally, the branches converge and output to the water outlet pipe for users to use. Through the above structure, compared with the conventional series pipe form, this embodiment can reduce heat loss and improve heat exchange efficiency.

[0036] Reference Figures 3 and 4 In some embodiments of the present invention, the parallel heat exchange tubes 430 include a water inlet chamber 431, a water outlet chamber 432, and multiple branch heat exchange tubes 433. One end of the branch heat exchange tubes 433 is connected to the water inlet chamber 431, and the other end is connected to the water outlet chamber 432. The first heat exchange tube is connected to the water inlet chamber 431, and the water outlet chamber 432 is used to connect to an external water outlet pipe. Specifically, the water inlet chamber 431 and the water outlet chamber 432 can be configured as vertically arranged water collection shells, and the ends of the branch heat exchange tubes 433 are respectively connected to the water inlet chamber 431 and the water outlet chamber 432, and are stacked up and down. The multiple branch heat exchange tubes 433 can be connected in parallel through the water inlet chamber 431 and the water outlet chamber 432, resulting in a simple structure and easy layout.

[0037] Reference Figure 2 and Figure 4 In some embodiments of the present invention, the branch heat exchange tubes 433 are serpentine-shaped and extend in a zigzag manner in the transverse direction. Each branch heat exchange tube 433 is spaced apart vertically. Specifically, the branch heat exchange tubes 433 can extend in a serpentine manner in the front-to-back direction to extend the tube length and increase the heat exchange area. Furthermore, the branch heat exchange tubes 433 can be stacked one on top of the other to increase the heat exchange flow rate and enhance the heat exchange effect.

[0038] Reference Figure 2 and Figure 4In some embodiments of the present invention, adjacent branch heat exchange tubes 433 are arranged in a staggered arrangement. Specifically, when the branch heat exchange tubes 433 are arranged in a serpentine pattern, gaps are provided between the tubes. By staggering the adjacent tubes, the gaps between one branch heat exchange tube 433 can be aligned with those between another branch heat exchange tube 433, allowing the flue gas to fully contact and heat each branch heat exchange tube 433, further improving heat exchange efficiency.

[0039] It should be noted that the branch heat exchange tube 433 can be made of stainless steel.

[0040] Reference Figures 2 to 4 In some embodiments of the present invention, the series heat exchange pipes 320 include a plurality of straight pipes 321 and a plurality of connecting elbows 322. The straight pipes 321 are spaced apart, and the connecting elbows 322 can connect two straight pipes 321 and connect the straight pipes 321 in series. Specifically, the spacing of the straight pipes 321 is relatively simple, and the connecting elbows 322 can be connected to the straight pipes 321 via quick-connect interfaces, which simplifies assembly. After the straight pipes 321 and the connecting elbows 322 are connected, the entire series heat exchange pipe assembly 320 can be formed into a serpentine shape, which improves heat exchange efficiency and facilitates the assembly of the pipes in series.

[0041] Reference Figures 2 to 4 In some embodiments of the present invention, a plurality of straight tubes 321 are arranged transversely at intervals to form a first-layer tube group, and a plurality of straight tubes 321 are arranged transversely at intervals to form a second-layer tube group. The first-layer tube group and the second-layer tube group are arranged vertically, and the straight tubes 321 of the first-layer tube group and the second-layer tube group are arranged staggered. One end of the connecting elbow 322 is connected to the straight tubes 321 of the first-layer tube group, and the other end is connected to the straight tubes 321 of the second-layer tube group. Specifically, the first-layer tube group and the second-layer tube group are arranged vertically at intervals, and the two-layer tube groups have the same number of straight tubes 321. The connecting elbow 322 can be connected to the straight tubes 321 at an angle, with the lower end connected to the first-layer tube group and the upper end connected to the second-layer tube group. The two-layer tube group can extend the length of the series tubes and expand the heat exchange area. The connecting elbow 322 allows the entire pipeline to be arranged to meander vertically and horizontally, which can further improve the heat exchange effect.

[0042] Reference Figures 1 to 4 In some embodiments of the present invention, a blower 500 is further included. The blower 500 is disposed in the housing 100 and connected to the burner 200. The blower 500 can blow air toward the combustion chamber 210 and into the first heat exchange chamber 310 and the second heat exchange chamber 410. Specifically, the blower 500 can accelerate the upward flow of the flue gas, thereby accelerating the upward transfer of heat and improving the heat exchange effect.

[0043] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A condensing water heater, characterized in that: include: Housing (100); A burner (200) is disposed in the housing (100), and the burner (200) has a combustion chamber (210); A primary heat exchanger (300) is provided in the housing (100) and is located above the burner (200). The primary heat exchanger (300) includes a first heat exchange cavity (310) and a first heat exchange tube. The first heat exchange tube is provided in the first heat exchange cavity (310). The first heat exchange cavity (310) is connected to the combustion cavity (210). A communication port (311) is provided at the top of the first heat exchange cavity (310). a secondary heat exchanger (400) disposed in the housing (100) and located above the primary heat exchanger (300); the secondary heat exchanger (400) comprising a second heat exchange cavity (410) and a second heat exchange tube; the second heat exchange tube is disposed in the second heat exchange cavity (410) and connected to the first heat exchange tube; The connecting port (311) is arranged close to one side of the shell (100), a smoke inlet (411) is provided on the side wall of the second heat exchange chamber (410) close to the connecting port (311), a smoke exhaust port (412) is provided on the top of the second heat exchange chamber (410), and the smoke exhaust port (412) is arranged away from one side of the smoke inlet (411), and the smoke inlet (411) can be connected to the connecting port (311).

2. A condensing water heater according to claim 1, characterized in that: A guide portion (312) is provided at the top of the first heat exchange chamber (310), and the guide portion (312) is inclined from bottom to top toward the communication port (311).

3. A condensing water heater according to claim 2, characterized in that: The secondary heat exchanger (400) further comprises a box body (420), wherein the box body (420) has a cavity therein, and a vertical partition (421) is provided in the box body (420), wherein the partition (421) is used to separate the cavity into a second heat exchange cavity (410) and a smoke channel (422), and the partition (421) is provided with the smoke inlet (411) to connect the second heat exchange cavity (410) with the smoke channel (422), and the smoke channel (422) is connected with the connecting port (311).

4. A condensing water heater according to claim 2, characterized in that: The first heat exchange tube is configured as a series heat exchange tube (320), and the second heat exchange tube is configured as a parallel heat exchange tube (430). One end of the series heat exchange tube (320) is used to be connected to an external water inlet pipe, and the other end is connected to the parallel heat exchange tube (430). The other end of the parallel heat exchange tube (430) is used to be connected to an external water outlet pipe.

5. A condensing water heater according to claim 4, characterized in that: The parallel heat exchange tube (430) comprises a water inlet chamber (431), a water outlet chamber (432) and a plurality of branch heat exchange tubes (433). One end of the branch heat exchange tube (433) is in communication with the water inlet chamber (431), and the other end is in communication with the water outlet chamber (432). The first heat exchange tube is in communication with the water inlet chamber (431), and the water outlet chamber (432) is used to be connected to an external water outlet pipe.

6. A condensing water heater according to claim 5, characterized in that: The branch heat exchange tubes (433) are serpentine-shaped and extend in a zigzag manner in the transverse direction, and the branch heat exchange tubes (433) are arranged at intervals in the vertical direction.

7. A condensing water heater according to claim 6, characterized in that: The upper and lower adjacent branch heat exchange tubes (433) are arranged in a staggered manner.

8. The condensing water heater according to claim 4, characterized in that: The series heat exchange tubes (320) include a plurality of straight tubes (321) and a plurality of connecting elbows (322). The straight tubes (321) are arranged at intervals. The connecting elbows (322) can connect two straight tubes (321) and connect the straight tubes (321) in series.

9. The condensing water heater according to claim 8, characterized in that: A plurality of the straight tubes (321) are arranged transversely at intervals to form a first layer tube group, and a plurality of the straight tubes (321) are arranged transversely at intervals to form a second layer tube group. The first layer tube group and the second layer tube group are arranged vertically, and the straight tubes (321) of the first layer tube group and the second layer tube group are staggered. One end of the connecting elbow (322) is connected to the straight tubes (321) of the first layer tube group, and the other end is connected to the straight tubes (321) of the second layer tube group.

10. The condensing water heater according to claim 1, characterized in that: The invention also includes a fan (500), which is arranged in the housing (100) and connected to the burner (200). The fan (500) can blow air toward the combustion chamber (210) to the first heat exchange chamber (310) and the second heat exchange chamber (410).

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