Gas water heater

Abstract

The utility model discloses a gas water heater and relates to the technical field of water heaters. The gas water heater comprises a machine shell, a combustion heat exchange assembly, a draught fan and a condensation heat exchange assembly. The machine shell comprises a bottom shell and a face cover arranged on the front face of the bottom shell. The combustion heat exchange assembly is arranged in the bottom shell and is close to one side wall of the bottom shell, and the combustion heat exchange assembly and the other side wall of the bottom shell are arranged in a spaced mode to form a mounting space. The fan is arranged below the combustion heat exchange assembly; the condensation heat exchange assembly is arranged above the installation space and located on the smoke downstream side of the combustion heat exchange assembly. A first water inlet end and a first water outlet end are arranged on the side, facing the face cover, of the condensation heat exchange assembly, the first water inlet end is used for being connected with a first water inlet pipe, and the first water outlet end is used for being connected with a first water outlet pipe. According to the technical scheme, the internal structure of the water heater can be reasonably arranged, and the overall size is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a gas water heater. Background Technology

[0002] After a single heat exchange, a conventional gas water heater typically produces medium-temperature flue gas at around 180℃. This flue gas has a high content of CO2 and NOx, and also contains water vapor with a high heat energy content. Direct emission of this gas not only pollutes the environment but also results in a significant loss of heat energy. To avoid environmental pollution and heat energy waste caused by direct flue gas emission, condensing gas water heaters have been developed. Condensing gas water heaters use a condensing heat exchanger for secondary heat exchange, preheating the water, recovering the latent heat of the medium-temperature flue gas, improving the utilization rate of the gas, and significantly reducing the temperature of the flue gas discharged from the unit.

[0003] In related technologies, the condensing heat exchanger in a condensing gas water heater is located directly above the main heat exchanger. Considering that the condensing heat exchanger produces condensate, a water-receiving structure or partition is usually installed between the condensing and main heat exchangers to prevent condensate from dripping onto the main heat exchanger, resulting in an increase in overall height. Furthermore, the inlet and outlet pipes of the condensing heat exchanger are typically led out from the lower side or lateral side, which reduces the space available for disassembling and installing the inlet and outlet pipes. This may encroach on the installation space of the electrical control device, causing the electrical control device and its components below it (such as water valves) to be moved downwards, resulting in a larger overall size of the water heater. Utility Model Content

[0004] The main purpose of this utility model is to propose a gas water heater that aims to rationally arrange the internal structure of the water heater and reduce the overall size of the unit.

[0005] To achieve the above objectives, the gas water heater proposed in this utility model includes:

[0006] The housing includes a bottom shell and a front cover disposed on the front of the bottom shell;

[0007] A combustion heat exchange assembly is disposed inside the bottom shell and is located near one side wall of the bottom shell. The combustion heat exchange assembly and the other side wall of the bottom shell are spaced apart to form an installation space.

[0008] A blower, located below the combustion heat exchange assembly, is used to blow air into the combustion heat exchange assembly; and

[0009] A condensing heat exchange component is disposed above the installation space and located downstream of the flue gas of the combustion heat exchange component; the condensing heat exchange component has a first water inlet and a first water outlet on the side facing the cover, the first water inlet is used to connect to a first water inlet pipe, and the first water outlet is used to connect to a first water outlet pipe.

[0010] In one embodiment of this application, the gas water heater further includes an electronic control device disposed within the bottom shell, the electronic control device being installed in the installation space near the condensing heat exchange component.

[0011] In one embodiment of this application, the bottom wall of the bottom shell is provided with a water inlet connector, and the first water inlet pipe extends from the water inlet connector through the installation space to connect with the first water inlet end;

[0012] The first water inlet pipe is located on the side of the electronic control device near the face cover.

[0013] In one embodiment of this application, the combustion heat exchange component is provided with a second water inlet and a second water outlet on the side near the installation space, the first water outlet pipe connects the first water outlet and the second water inlet, and the second water outlet is connected to the second water outlet pipe;

[0014] The first water outlet pipe is located within the installation space;

[0015] A water outlet connector is provided on the bottom wall of the bottom shell, and the second water outlet pipe extends from the second water outlet end through the installation space to connect with the water outlet connector.

[0016] In one embodiment of this application, the electronic control device extends vertically, and a cavity exists between the electronic control device and the combustion heat exchange assembly;

[0017] The first water outlet pipe is located on the side of the electronic control device near the face cover, and / or the first water outlet pipe is located inside the cavity.

[0018] In one embodiment of this application, the first water outlet pipe includes a first sub-pipe segment and a second sub-pipe segment connected by bending. The first sub-pipe segment is located on the side of the electronic control device near the face cover and extends downward from the first water outlet end. The second sub-pipe segment is located in the cavity and extends upward to connect with the second water inlet end.

[0019] The gas water heater also includes a bypass pipe disposed in the cavity, the bypass pipe connecting the second sub-pipe section and the second outlet pipe, and extending in the front-to-back direction.

[0020] In one embodiment of this application, the bottom wall of the bottom shell is provided with a drainage assembly, the bottom wall of the condensation heat exchange assembly is connected with a drain pipe, the drain pipe extends downward through the installation space to connect with the drainage assembly, and the drain pipe is located between the electronic control device and the combustion heat exchange assembly.

[0021] In one embodiment of this application, the gas water heater further includes a gas valve assembly and a water inlet valve assembly disposed on the bottom shell. The gas valve assembly is disposed below the combustion heat exchange assembly and located to the side of the fan. The water inlet valve assembly is installed on the first water inlet pipe and is located to the side of the gas valve assembly.

[0022] In one embodiment of this application, the gas water heater further includes a smoke guide structure disposed on the top of the combustion heat exchange component, and the condensation heat exchange component is disposed on the side of the smoke guide structure. The smoke guide structure connects the combustion heat exchange component and the condensation heat exchange component so that the flue gas flowing out of the combustion heat exchange component enters the condensation heat exchange component after making a bend.

[0023] In one embodiment of this application, the condensation heat exchange assembly includes:

[0024] A condensing heat exchanger includes a condensing shell and a condensing heat exchange tube disposed within the condensing shell. The first water inlet and the first water outlet are located on the side of the condensing shell facing the cover and are both connected to the condensing heat exchange tube.

[0025] A flue gas inlet pipe is located on the side of the condenser housing and connected to the outlet end of the flue gas guiding structure; and

[0026] The exhaust pipe is located at the top of the condenser shell and extends through the top wall of the bottom shell.

[0027] In this utility model's gas water heater, the combustion heat exchange component is located on one side of the bottom shell, with an installation space formed by a gap between it and the other side of the bottom shell. A fan is positioned below the combustion heat exchange component, and a condensing heat exchange component is positioned above the installation space, dividing the internal space of the casing into a left-right distribution pattern. This arrangement allows for rational planning of water circuit layout and electrical wiring, making full use of the internal space and resulting in a more compact overall layout. Furthermore, by placing the first inlet and outlet of the condensing heat exchange component on the side facing the front cover, sufficient space is available for assembling or disassembling the inlet and outlet pipes simply by removing the front cover from the bottom shell. Compared to related technologies where the inlet and outlet connectors are located at the bottom or side, this embodiment does not require installation space for components such as electrical control devices, nor does it require increasing the casing volume to expand the operating space. Therefore, this embodiment reduces the overall size of the unit while facilitating the assembly and disassembly of the condensing heat exchange component's inlet and outlet pipes. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the gas water heater of this utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the hidden electronic control device in the embodiment;

[0031] Figure 3 for Figure 2 Side view;

[0032] Figure 4 This is a schematic diagram of the cooperative structure of the combustion heat exchange component, the smoke guiding structure, and the condensation heat exchange component in an embodiment of this utility model;

[0033] Figure 5 for Figure 4 Cross-sectional view of the embodiment;

[0034] Figure 6 This is a schematic diagram of the condensation heat exchange component in an embodiment of this utility model.

[0035] Explanation of icon numbers:

[0036] label name label name 1 bottom shell 401 First water inlet end 101 Water inlet connector 402 First water outlet end 102 Water outlet connector 51 First water inlet pipe 2 Combustion heat exchange components 52 First water outlet pipe 21 burner 521 First sub-section 22 Main heat exchanger 522 Second sub-section 201 Second water inlet end 53 Second water outlet pipe 202 Second water outlet 54 Bypass pipe 3 Fan 55 Inlet valve assembly 4 Condensing heat exchanger 6 Electrical control device 41 Condensing heat exchanger 71 Drain pipe 411 Condensation shell 72 Drainage components 412 Condensing heat exchanger tube 8 Gas valve assembly 42 Smoke inlet pipe 9 Smoke guiding structure 43 Smoke exhaust pipe A Installation space

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or" as an example, it includes option A, option OR, or option A and both satisfying the condition.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] Gas water heaters include forced-extraction water heaters and forced-blowing water heaters. In some forced-extraction water heaters, the fan is located above the main heat exchanger, and the condensing heat exchanger is located to the side of the fan. That is, the fan is located between the main heat exchanger and the condensing heat exchanger. It is used to extract the flue gas flowing through the main heat exchanger and transport it to the condensing heat exchanger for secondary heat exchange. However, since forced-extraction water heaters extract gas through negative pressure, the negative pressure environment may lead to incomplete combustion and produce more harmful substances. In forced-draft water heaters, the fan is located below the main heat exchanger. By using positive pressure to blow air, it can more effectively provide combustion air and improve combustion efficiency. However, in this type of water heater, the condenser heat exchanger is usually located directly above the main heat exchanger. Since the condenser heat exchanger produces condensate, a water collection structure or partition structure is usually installed between the condenser heat exchanger and the main heat exchanger to prevent condensate from dripping onto the main heat exchanger. This results in an increase in overall height. At the same time, the inlet and outlet water pipes of the condenser heat exchanger usually need to be led out from the lower side or the lateral side. This arrangement results in less space for disassembling and assembling the inlet and outlet water pipes. In order to have sufficient space for disassembly and assembly, leading the inlet and outlet water pipes out from the lower side may require moving the electrical control device and the components below it (such as water valves) to expand the space, resulting in an increase in the overall height of the unit. Leading the inlet and outlet water pipes out from the lateral side may require expanding the side wall of the casing outward, resulting in an increase in the volume of the casing.

[0043] Based on this, the present invention proposes a gas water heater, which aims to rationally arrange the internal structure of a forced-draft water heater, reduce the overall size of the unit, and facilitate the disassembly and assembly of the inlet and outlet pipes of the condenser heat exchanger 41. The structure of the gas water heater will be described below by way of an embodiment.

[0044] like Figures 1 to 4 As shown, the gas water heater includes a casing, a combustion heat exchange component 2, a fan 3, and a condensation heat exchange component 4.

[0045] The housing includes a bottom shell 1 and a cover on the front of the bottom shell 1; a combustion heat exchange assembly 2 is disposed inside the bottom shell 1 and is located on one side close to the bottom shell 1, and the combustion heat exchange assembly 2 and the other side wall of the bottom shell 1 are spaced apart to form an installation space A; a fan 3 is disposed below the combustion heat exchange assembly 2 and is used to blow air into the combustion heat exchange assembly 2; a condensation heat exchange assembly 4 is disposed above the installation space A and is located downstream of the flue gas of the combustion heat exchange assembly 2; the condensation heat exchange assembly 4 is provided with a first water inlet 401 and a first water outlet 402 on the side facing the cover, the first water inlet 401 is used to connect to a first water inlet pipe 51, and the first water outlet 402 is used to connect to a first water outlet pipe 52.

[0046] In this embodiment, the casing is the outer shell of the water heater, used to install and support its various internal components, such as the combustion heat exchange assembly 2, the fan 3, the condensation heat exchange assembly 4, the flue gas guide structure 9, the gas valve assembly 8, and the water valve assembly, etc. The casing includes a bottom shell 1 and a front cover, which can be fixed by means of snaps, screws, etc., to facilitate the installation and disassembly of the internal components. It can be understood that when the water heater is in normal wall-mounted operation, the bottom shell 1 is fixed to the wall, and the front cover is located on the side of the bottom shell 1 away from the wall, shielding and protecting the internal components. Some control panels for user operation can be installed on it, that is, the front cover is on the front (front side) of the bottom shell 1. It should be noted that, for ease of understanding, the directional terms such as above, below, top wall, bottom wall, and side mentioned in this specification all refer to the orientation of the water heater in normal wall-mounted operation.

[0047] Understandably, the combustion heat exchange assembly 2 includes a burner 21 and a main heat exchanger 22 located above the burner 21. The fan 3 is used to blow external air into the interior of the combustion heat exchange assembly 2 to mix with the gas and be burned by the burner 21. It also drives the high-temperature flue gas generated by the combustion of the burner 21 to flow upward to the main heat exchanger 22 for primary heat exchange. After primary heat exchange, the flue gas flows through the flue gas guide structure 9 to the condensation heat exchange assembly 4 for secondary heat exchange before being discharged from the exhaust pipe 43. In this way, the temperature of the flue gas after secondary heat exchange is lower, which improves the heat utilization rate.

[0048] The combustion heat exchange component 2 is located inside the bottom shell 1 and near one side wall of the bottom shell 1 (as shown in the figure, the left side wall). The combustion heat exchange component 2 and the other side wall of the bottom shell 1 (as shown in the figure, the right side wall) are spaced apart to form an installation space A. This installation space A can be used for the installation of the power control device 6, water pipes, or other components. At the same time, the fan 3 is located below the combustion heat exchange component 2, and the condensation heat exchange component 4 is located above the installation space A. This divides the internal space of the casing into a left-right distribution pattern. The combustion heat exchange component 2 and the fan 3 are located in the left area, and the condensation heat exchange component 4, the power control device 6, water pipes, and other components are located in the right installation space A area. This arrangement allows for reasonable planning of both water circuit layout and electrical wiring layout, avoiding clutter and complexity. Furthermore, placing the condensing heat exchange assembly 4 on the side of the combustion heat exchange assembly 2 not only makes full use of the space on the side of the combustion heat exchange assembly 2 within the casing, resulting in a more compact overall layout and reduced overall size, but also facilitates the drainage of condensate and prevents condensate from dripping into the main heat exchanger 22, eliminating the need for additional water collection structures or baffles. Optionally, the condensing heat exchange assembly 4 can be a tube-fin heat exchanger, a plate heat exchanger, or some other type of heat exchanger. The condensing heat exchange assembly 4 may have the same or different structural type as the main heat exchanger 22.

[0049] The condensing heat exchange assembly 4 has a condensing heat exchange channel inside. The first inlet end 401 of the condensing heat exchange channel is connected to the first inlet pipe 51, and the first outlet end 402 is connected to the first outlet pipe 52. The first inlet pipe 51 is used to connect to the water inlet connector 101 of the water heater, and the first outlet pipe 52 is used to connect to the water inlet end of the main heat exchanger 22. In this way, cold water first flows through the condensing heat exchange assembly 4 for preheating, and then flows through the first outlet pipe 52 to the main heat exchanger 22 for heating. Finally, it flows out from the water outlet pipe of the water heater to the water terminal. This configuration can improve heat exchange efficiency and increase heat utilization rate. By setting the first water inlet 401 and the first water outlet 402 of the condensing heat exchange component 4 on the side close to the cover, that is, setting the water inlet and outlet connectors of the condensing heat exchange component 4 in the thickness direction of the whole machine, when assembly or disassembly is required, it is only necessary to remove the cover from the bottom shell 1, and the water inlet and outlet connectors 102 of the condensing heat exchange component 4 will be exposed and facing the front, providing sufficient space and operational convenience for the staff to disassemble and assemble. Compared with the method of setting the water inlet and outlet connectors 102 at the bottom or side in related technologies, this embodiment does not require the removal of other nearby components to make room, and also does not require increasing the volume of the casing to expand the operating space.

[0050] Optionally, the connection method between the first water inlet end 401 and the first water inlet pipe 51 can be determined according to the actual situation, such as quick-release connector, threaded connection, clamp connection, etc. Correspondingly, the connection method between the first water outlet end 402 and the first water outlet pipe 52 can also be determined according to the actual situation, such as quick-release connector, threaded connection, clamp connection, etc.

[0051] In summary, in the gas water heater of this utility model, the combustion heat exchange component 2 is located on one side of the bottom shell 1, and is spaced apart from the other side of the bottom shell 1 to form an installation space A. By setting the fan 3 below the combustion heat exchange component 2 and the condensing heat exchange component 4 above the installation space A, the internal space of the casing is divided into a left-right distribution pattern. This arrangement allows for reasonable planning of both water circuit layout and electrical wiring layout, making full use of the internal space of the casing and making the overall layout more compact. In addition, by setting the first water inlet end 401 and the first water outlet end 402 of the condensing heat exchange component 4 on the side facing the cover, when it is necessary to assemble or disassemble the water inlet and outlet pipes, it is only necessary to remove the cover from the bottom shell 1 to have sufficient space for disassembly and assembly. Compared with the method of setting the water inlet and outlet connectors 102 at the bottom or side in related technologies, this embodiment does not require the installation space of components such as the electronic control device 6, nor does it require increasing the volume of the casing to expand the operating space. Therefore, this embodiment can reduce the overall volume of the unit and facilitate the disassembly and assembly of the water inlet and outlet pipes of the condensing heat exchange component 4.

[0052] Please see Figures 1 to 3 In one embodiment of this application, the gas water heater further includes an electronic control device 6 disposed in the bottom shell 1, and the electronic control device 6 is installed in the installation space A near the condensing heat exchange component 4.

[0053] The electrical control device 6 controls the operation of the gas water heater. For example, the electrical control device 6 can be electrically connected to components such as the gas valve assembly 8, water valve assembly, burner 21, and fan 3 to control the operation of each component according to different functional requirements. In this embodiment, the electrical control device 6 is installed in the installation space A near the condensing heat exchange assembly 4, which avoids wasting space below the condensing heat exchange assembly 4 and ensures that there is sufficient space below the electrical control device 6 for the installation of other components such as the water valve assembly, making the structural layout more compact and reducing the overall size of the unit. Optionally, the electrical control device 6 can be configured as a modular structure and installed using a mounting bracket fixed to the back plate of the bottom shell 1.

[0054] Please see Figure 1 In one embodiment of this application, the bottom wall of the bottom shell 1 is provided with a water inlet connector 101, and the first water inlet pipe 51 extends from the water inlet connector 101 through the installation space A to connect with the first water inlet end 401; the first water inlet pipe 51 is located on the side of the electronic control device 6 near the face cover.

[0055] The water inlet connector 101 is located on the bottom wall of the bottom shell 1 and is used to connect to an external water source pipe. One end of the first water inlet pipe 51 is connected to the water inlet connector 101, and the other end is connected to the first water inlet end 401 of the condensing heat exchange component 4, so that cold water can smoothly enter the condensing heat exchange component 4. It is understood that in order to ensure sufficient combustion space, the combustion heat exchange component 2 will have sufficient thickness. Under normal circumstances, the thickness dimension of the combustion heat exchange component 2 will be greater than the thickness dimension of the electronic control device 6, that is, there will be a certain space between the electronic control device 6 and the front cover. In this embodiment, the first water inlet pipe 51 is located on the side of the electronic control device 6 closer to the front cover. This setting can make full use of the thickness space inside the water heater shell and avoid occupying the width space, which can effectively reduce the overall size of the machine. At the same time, the cold water flowing in the first water inlet pipe 51 can cool down the electronic control device 6 and prevent the electronic control device 6 from overheating.

[0056] Please see Figures 1 to 3 In one embodiment of this application, the combustion heat exchange component 2 is provided with a second water inlet 201 and a second water outlet 202 on the side near the installation space A. A first water outlet pipe 52 connects the first water outlet 402 and the second water inlet 201, and the second water outlet 202 is connected to a second water outlet pipe 53. The first water outlet pipe 52 is located in the installation space A. A water outlet connector 102 is provided on the bottom wall of the bottom shell 1, and the second water outlet pipe 53 extends from the second water outlet 202 through the installation space A to connect with the water outlet connector 102.

[0057] Understandably, the second inlet end 201 and the second outlet end 202 are the inlet and outlet ends of the main heat exchanger 22. The first outlet pipe 52 connects the first outlet end 402 and the second inlet end 201, and the second outlet end 202 is connected to the second outlet pipe 53, so that the main heat exchanger 22 is located downstream of the water path of the condensing heat exchange component 4. Thus, the cold water can be preheated by the condensing heat exchange component 4 before entering the main heat exchanger 22 for heating. This setting forms a counter-current mode between the flue gas and the water path, which can effectively improve the heat exchange efficiency.

[0058] A water outlet connector 102 is provided on the bottom wall of the bottom shell 1 for connecting an external hot water pipe to deliver hot water to the water terminal. In this embodiment, the first water outlet pipe 52 is located in the installation space A, and the second water outlet pipe 53 extends from the second water outlet end 202 through the installation space A to connect with the water outlet connector 102. That is, the paths of the first water outlet pipe 52 and the second water outlet pipe 53 both pass through the installation space A. In this way, the space on the side of the combustion heat exchange component 2 can be fully utilized, making the layout between each pipe and each component more reasonable and orderly.

[0059] Please see Figures 1 to 3 In one embodiment of this application, the electronic control device 6 extends vertically, and there is a cavity between the electronic control device 6 and the combustion heat exchange component 2.

[0060] In this embodiment, the electronic control device 6 extends vertically, so that the extension direction of the electronic control device 6 is approximately the same as the extension direction of the combustion heat exchange component 2. This allows full utilization of the installation space A on the side of the combustion heat exchange component 2, reducing the width dimension. At the same time, there is a cavity between the electronic control device 6 and the combustion heat exchange component 2, which can play a certain role in heat insulation, preventing excessive heat transfer from the combustion heat exchange component 2 to the electronic control device 6, thus avoiding overheating failure and extending the service life of the electronic control device 6.

[0061] Furthermore, the first water outlet pipe 52 is located on the side of the electronic control device 6 near the face cover, and / or the first water outlet pipe 52 is located inside the cavity.

[0062] Understandably, in practical applications, the first water outlet pipe 52 can be located on the side of the electronic control device 6 near the cover, which can make full use of the space of the casing thickness; or, the first water outlet pipe 52 can be located in the cavity, which can make full use of the installation space A on the side of the combustion heat exchange component 2; or, the first water outlet pipe 52 can be partially located on the side of the electronic control device 6 near the cover and partially located in the cavity between the electronic control device 6 and the combustion heat exchange component 2, which can adapt to the pipe routing requirements, such as easy bending, connecting to the bypass pipe 54 and other different requirements.

[0063] Specifically, please refer to Figures 1 to 3 The first water outlet pipe 52 includes a first sub-pipe section 521 and a second sub-pipe section 522 connected by bending. The first sub-pipe section 521 is located on the side of the electronic control device 6 near the face cover and extends downward from the first water outlet end 402. The second sub-pipe section 522 is located in the cavity and extends upward to connect with the second water inlet end 201. The gas water heater also includes a bypass pipe 54 disposed in the cavity. The bypass pipe 54 connects the second sub-pipe section 522 and the second water outlet pipe 53 and extends in the front-back direction.

[0064] In this embodiment, by setting a bypass pipe 54 to connect the second sub-pipe section 522 and the second outlet pipe 53, the water in the second sub-pipe section 522 can flow into the second outlet pipe 53 through the bypass pipe 54 to mix with the hot water, thus preventing the water heater from overheating when the water supply is interrupted. By configuring the first water outlet pipe 52 as including a first sub-pipe segment 521 and a second sub-pipe segment 522 connected by bending, the first sub-pipe segment 521 is connected to the first water outlet end 402 and the second sub-pipe segment 522 is connected to the second water inlet end 201. The first sub-pipe segment 521 is located on the side of the electronic control device 6 near the cover, and the second sub-pipe segment 522 is located in the cavity between the electronic control device 6 and the combustion heat exchange assembly 2. This allows the pipe layout of the first water outlet pipe 52 to be adapted to the space inside the casing, making full use of the space on the front and left sides of the electronic control device 6. At the same time, the bypass pipe 54 connects to the second sub-pipe segment 522 and extends in the front-back direction, so that the extension direction of the bypass pipe 54 is roughly parallel to the side wall of the combustion heat exchange assembly 2. Thus, the second water outlet pipe 53 extends roughly in the vertical direction inside the cavity. This makes the layout inside the casing more regular and compact, and does not require additional space for components such as the electronic control device 6 and water valve assembly, preventing the overall size of the machine from being too large.

[0065] Please see Figure 1 In one embodiment of this application, the bottom wall of the bottom shell 1 is provided with a drainage component 72, and the bottom wall of the condensation heat exchange component 4 is connected to a drain pipe 71. The drain pipe 71 extends downward through the installation space A to connect with the drainage component 72. The drain pipe 71 is located between the electronic control device 6 and the combustion heat exchange component 2.

[0066] Understandably, the condensing heat exchange component 4 will produce some condensate after exchanging heat with the flue gas. By setting a drain pipe 71 on the bottom wall of the condensing heat exchange component 4 and a drain component 72 on the bottom wall of the bottom shell 1, the condensate in the condensing heat exchange component 4 can be discharged downwards through the drain pipe 71 to the drain component 72 under its own gravity for treatment. Optionally, the drain component 72 can be a component with filtering, neutralization and other functions, or the drain component 72 can be a component for collecting condensate, etc.

[0067] In this embodiment, by extending the drain pipe 71 downward through the installation space A and placing it between the electronic control device 6 and the combustion heat exchange assembly 2, the space between the combustion heat exchange assembly 2 and the electronic control device 6 can be fully utilized without the need for additional design to avoid the drain pipe 71, and the overall size of the machine can also be reduced.

[0068] Please see Figures 1 to 3 In one embodiment of this application, the gas water heater further includes a gas valve assembly 8 and a water inlet valve assembly 55 disposed on the bottom shell 1. The gas valve assembly 8 is disposed below the combustion heat exchange assembly 2 and located to the side of the fan 3; the water inlet valve assembly 55 is installed on the first water inlet pipe 51 and is located to the side of the gas valve assembly 8.

[0069] In this embodiment, by placing the gas valve assembly 8 below the combustion heat exchange assembly 2 and on the side of the fan 3, the distance between the gas valve assembly 8 and the burner 21 is relatively close, which facilitates the control of gas intake; the water inlet valve assembly 55 is installed below the electronic control device 6 and on the side of the gas valve assembly 8, which can make reasonable use of the space below the electronic control device 6 and on the side of the fan 3, making the overall layout more compact.

[0070] Please see Figure 1 , Figure 2 as well as Figures 4 to 6 In one embodiment of this application, the gas water heater further includes a smoke guide structure 9 disposed on the top of the combustion heat exchange component 2, and a condensation heat exchange component 4 disposed on the side of the smoke guide structure 9. The smoke guide structure 9 connects the combustion heat exchange component 2 and the condensation heat exchange component 4 so that the flue gas flowing out of the combustion heat exchange component 2 enters the condensation heat exchange component 4 after making a bend.

[0071] In this embodiment, the combustion heat exchange component 2 and the condensation heat exchange component 4 are connected by a smoke guide structure 9. This allows the flue gas after primary heat exchange by the combustion heat exchange component 2 to be guided by the smoke guide structure 9 to the condensation heat exchange component 4 on the side for secondary heat exchange. Compared with the related technology where the condensation heat exchange component 4 is located directly above the combustion heat exchange component 2, this approach makes full use of the space on the side of the combustion heat exchange component 2 inside the casing, resulting in a more compact overall layout and reduced overall size. It also facilitates the discharge of condensate and prevents condensate from dripping into the main heat exchanger 22 without the need for additional water collection structures or baffles. Furthermore, the smoke guiding structure 9 is used to guide the airflow through its inner cavity in one bend. That is, the flue gas flowing out of the combustion heat exchange component 2 flows to the condensation heat exchange component 4 in only one bend. Compared with the structure with multiple bends in related technologies, this embodiment reduces the resistance of flue gas emission and makes the flue gas flow more smoothly without having to increase the speed of the fan 3. Thus, under the same flue gas emission efficiency, this embodiment can effectively reduce system noise.

[0072] It should be noted that the single-turn guidance of the flue gas by the smoke guide structure 9 in this embodiment can be understood as the flue gas flowing out of the combustion heat exchange component 2 turning and changing direction once to align with the direction of the condensation heat exchange component 4's inlet. In practical applications, to further reduce flue gas emission resistance, the turning angle of the single-turn guidance via the smoke guide structure 9 can be selected to be no more than 100°, and approximately around 90°. This setting allows for smaller changes in the flue gas flow angle, which is more conducive to circulation. The specific structure of the smoke guide structure 9 can also be determined according to the actual situation, such as a pipe structure, a box structure, or some irregular structures.

[0073] In one embodiment of this application, the condensing heat exchange assembly 4 includes a condensing heat exchanger 41, a flue gas inlet pipe 42, and a flue gas outlet pipe 43. The condensing heat exchanger 41 includes a condensing shell 411 and a condensing heat exchange pipe 412 disposed within the condensing shell 411. A first water inlet end 401 and a first water outlet end 402 are disposed on the side of the condensing shell 411 facing the cover and are both connected to the condensing heat exchange pipe 412. The flue gas inlet pipe 42 is disposed on the side of the condensing shell 411 and is connected to the outlet end of the flue gas guiding structure 9. The flue gas outlet pipe 43 is disposed on the top of the condensing shell 411 and extends through the top wall of the bottom shell 1.

[0074] The condenser shell 411 serves to form a flue gas passage and prevent flue gas leakage. The first water inlet 401 and the first water outlet 402 are set on the condenser shell 411. Multiple condenser heat exchange tubes 412 are provided inside the condenser shell 411. The condenser heat exchange flow channel formed by the multiple condenser heat exchange tubes 412 is connected to the first water inlet 401 and the first water outlet 402 respectively. The first water inlet 401 of the condenser heat exchanger 41 is connected to the first water inlet pipe 51. The first water outlet 402 is connected to the second water inlet 201 of the main heat exchanger 22 through the first water outlet pipe 52. The second water outlet 202 of the main heat exchanger 22 is connected to the second water outlet pipe 53. The cold water is preheated by the condenser heat exchanger 41 before flowing into the main heat exchanger 22. By placing the first water inlet 401 and the first water outlet 402 on the side of the condenser housing 411 facing the cover, when it is necessary to assemble or disassemble the water inlet and outlet pipes, it is only necessary to remove the cover from the bottom shell 1 to have sufficient space for disassembly and assembly, which is more conducive to disassembly and assembly operations.

[0075] The flue gas inlet pipe 42 is connected to the flue gas guide structure 9, allowing the flue gas inside the flue gas guide structure 9 to smoothly enter the condensing heat exchanger 41. Optionally, the flue gas inlet pipe 42 is fitted outside the outlet end of the flue gas guide structure 9 to prevent flue gas leakage from the gap between the two. Optionally, the outlet end of the flue gas inlet pipe 42 and the flue gas guide structure 9 can be directly press-fitted together, or a sealing ring can be used to ensure the airtightness of the flue gas emission. The exhaust pipe 43 is located at the top of the condensing heat exchanger 41 and extends outside the gas water heater, allowing the exhaust gas inside the gas water heater to be discharged to the outside.

[0076] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A gas water heater, characterized in that, include: The housing includes a bottom shell and a front cover disposed on the front side of the bottom shell; A combustion heat exchange assembly is disposed inside the bottom shell and is located near one side wall of the bottom shell. The combustion heat exchange assembly and the other side wall of the bottom shell are spaced apart to form an installation space. A blower, located below the combustion heat exchange assembly, is used to blow air into the combustion heat exchange assembly; and A condensing heat exchange component is disposed above the installation space and located downstream of the flue gas of the combustion heat exchange component; the condensing heat exchange component has a first water inlet and a first water outlet on the side facing the cover, the first water inlet is used to connect to a first water inlet pipe, and the first water outlet is used to connect to a first water outlet pipe.

2. The gas water heater as described in claim 1, characterized in that, The gas water heater also includes an electronic control device located inside the bottom shell, which is installed in the installation space near the condensing heat exchange component.

3. The gas water heater as described in claim 2, characterized in that, The bottom wall of the bottom shell is provided with a water inlet connector, and the first water inlet pipe extends from the water inlet connector through the installation space to connect with the first water inlet end; The first water inlet pipe is located on the side of the electronic control device near the face cover.

4. The gas water heater as described in claim 2, characterized in that, The combustion heat exchange component is provided with a second water inlet and a second water outlet on the side near the installation space. The first water outlet pipe connects the first water outlet and the second water inlet, and the second water outlet is connected to the second water outlet pipe. The first water outlet pipe is located within the installation space; A water outlet connector is provided on the bottom wall of the bottom shell, and the second water outlet pipe extends from the second water outlet end through the installation space to connect with the water outlet connector.

5. The gas water heater as described in claim 4, characterized in that, The electronic control device extends vertically, and there is a cavity between the electronic control device and the combustion heat exchange assembly; The first water outlet pipe is located on the side of the electronic control device near the faceplate, and / or the first water outlet pipe is located inside the cavity.

6. The gas water heater as described in claim 5, characterized in that, The first water outlet pipe includes a first sub-pipe section and a second sub-pipe section connected by bending. The first sub-pipe section is located on the side of the electronic control device near the face cover and extends downward from the first water outlet end. The second sub-pipe section is located in the cavity and extends upward to connect with the second water inlet end. The gas water heater also includes a bypass pipe disposed in the cavity, the bypass pipe connecting the second sub-pipe section and the second outlet pipe, and extending in the front-to-back direction.

7. The gas water heater as described in any one of claims 2 to 6, characterized in that, The bottom wall of the bottom shell is provided with a drainage assembly, and the bottom wall of the condensation heat exchange assembly is connected to a drain pipe. The drain pipe extends downward through the installation space to connect with the drainage assembly, and the drain pipe is located between the electronic control device and the combustion heat exchange assembly.

8. The gas water heater as described in any one of claims 1 to 6, characterized in that, The gas water heater also includes a gas valve assembly and a water inlet valve assembly disposed on the bottom shell. The gas valve assembly is disposed below the combustion heat exchange assembly and located to the side of the fan. The water inlet valve assembly is installed on the first water inlet pipe and is located to the side of the gas valve assembly.

9. The gas water heater as described in any one of claims 1 to 6, characterized in that, The gas water heater also includes a smoke guide structure located on top of the combustion heat exchange component, and a condensation heat exchange component located on the side of the smoke guide structure. The smoke guide structure connects the combustion heat exchange component and the condensation heat exchange component so that the flue gas flowing out of the combustion heat exchange component enters the condensation heat exchange component after making a bend.

10. The gas water heater as described in claim 9, characterized in that, The condensation heat exchange assembly includes: A condensing heat exchanger includes a condensing shell and a condensing heat exchange tube disposed within the condensing shell. The first water inlet and the first water outlet are located on the side of the condensing shell facing the cover and are both connected to the condensing heat exchange tube. A flue gas inlet pipe is located on the side of the condenser housing and connected to the outlet end of the flue gas guiding structure; and The exhaust pipe is located at the top of the condenser shell and extends through the top wall of the bottom shell.

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