CN221666264U - Condensing gas water heater - Google Patents

Abstract

The utility model relates to the technical field of household appliances and discloses a condensing gas water heater which comprises a water heater main body, a condensed water eduction tube and an evaporation assembly, wherein the water heater main body comprises a heat exchanger assembly, the condensed water eduction tube is connected between the heat exchanger assembly and the evaporation assembly and is used for conveying condensed water generated by the heat exchanger assembly to the evaporation assembly, and the evaporation assembly is used for heating and evaporating the condensed water conveyed by the condensed water eduction tube. The condensing gas water heater is connected between the heat exchanger component and the evaporation component by adopting the condensed water eduction tube, so that condensed water generated by the heat exchanger component is conveyed to the evaporation component, and the condensed water is heated and evaporated by the evaporation component, so that a special condensed water discharge pipeline is not required to be reserved indoors, the step of wiring a water tube is omitted, the popularization threshold of the condensing gas water heater is reduced, and the practicability is higher.

Description

Condensing gas water heater

Technical Field

The utility model relates to the technical field of household appliances, in particular to a condensing gas water heater.

Background

Condensing water heater is one of the most energy-saving and most environment-friendly products at present. When a common gas water heater works, the temperature of discharged flue gas is up to 180 ℃, the temperature of flue gas discharged by the condensing water heater is only about 60 ℃, compared with the common gas water heater, the condensing water heater is provided with a condensing heat exchanger, cold water is preheated by absorbing energy in high-temperature flue gas through the condensing heat exchanger, and the heat of preheating the cold water is not obtained by burning gas, but the heat in the flue gas which cannot be recovered originally is utilized. Therefore, the condensing water heater improves the heat conversion efficiency, not only realizes the energy-saving effect, but also saves fuel gas, and is more environment-friendly.

Because condensation formula water heater is in the in-process of utilizing latent heat in the flue gas, needs reduce exhaust temperature to can produce the comdenstion water, for this reason, indoor needs to reserve the comdenstion water discharge pipeline specially, in order to draw out the comdenstion water open air, causes the pipeline wiring complicated, and the practicality is discounted greatly.

Disclosure of utility model

In view of the defects in the prior art, the utility model provides the condensing gas water heater, which can lead out an outdoor condensing drain pipe without additional arrangement, and improves the practicability of products.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a condensation type gas heater, includes water heater main part, comdenstion water eduction tube and evaporation subassembly, the water heater main part includes the heat exchanger subassembly, the comdenstion water eduction tube is connected the heat exchanger subassembly with between the evaporation subassembly, be used for with the comdenstion water that the heat exchanger subassembly produced is carried to the evaporation subassembly, the evaporation subassembly is used for the heating evaporation comdenstion water that the comdenstion water eduction tube carried.

As one embodiment, the evaporation assembly comprises an evaporation container and a heating element arranged in the evaporation container, the evaporation container is provided with an opening communicated with the outside, and condensed water can be evaporated from the opening after being heated by the heating element.

As one embodiment, the opening is formed at the top of the evaporation vessel.

As one embodiment, the water heater main body comprises a smoke exhaust pipe, the opening is communicated with the smoke exhaust pipe, and condensed water evaporated in the evaporation container can be collected from the opening to the smoke exhaust pipe for discharge.

As one embodiment, the water heater main body comprises a shell, and the heat exchanger assembly and the evaporation container are both positioned in the shell.

As one embodiment, the evaporation container is arranged below the heat exchanger assembly, and/or the condensed water eduction tube is connected to the bottom of the heat exchanger assembly.

As one embodiment, the water heater body comprises a combustion device and a water pipe assembly, the heat exchanger assembly comprises a first heat exchanger, the water pipe assembly comprises a first water pipe arranged on the first heat exchanger, and the combustion device is used for heating the first heat exchanger.

As one embodiment, the combustion device is arranged above or below the first heat exchanger, and a flame nozzle of the combustion device faces to the first heat exchanger.

As one embodiment, the heat exchanger assembly further comprises a second heat exchanger in fluid communication with the first heat exchanger and disposed above the first heat exchanger; the water pipe assembly comprises a second water pipe arranged on the second heat exchanger, and the second water pipe is arranged on the water path at the upstream of the first water pipe.

As one embodiment, the condensed water lead-out pipe is connected below the second heat exchanger.

The condensing gas water heater is connected between the heat exchanger component and the evaporation component by adopting the condensed water eduction tube, so that condensed water generated by the heat exchanger component is conveyed to the evaporation component, and the condensed water is heated and evaporated by the evaporation component, so that a special condensed water discharge pipeline is not required to be reserved indoors, the step of wiring a water tube is omitted, the popularization threshold of the condensing gas water heater is reduced, and the practicability is higher.

Drawings

FIG. 1 shows a schematic structure of a condensing gas water heater according to an embodiment of the present utility model;

FIG. 2 shows a schematic structural view of another condensing gas water heater according to an embodiment of the present utility model;

FIG. 3 shows a schematic view of an evaporation assembly of a condensing gas water heater according to an embodiment of the present utility model;

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

In the present utility model, the terms "disposed," "provided," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "radial," "circumferential," etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Fig. 1 shows a schematic structure of a condensing gas water heater according to an embodiment of the present utility model.

Referring to fig. 1, an embodiment of the present application provides a condensing gas water heater, which mainly includes a water heater main body 10, a condensate outlet pipe 20 and an evaporation assembly 30, wherein the water heater main body 10 includes a heat exchanger assembly 11, the condensate outlet pipe 20 is connected between the heat exchanger assembly 11 and the evaporation assembly 30, the condensate outlet pipe 20 is used for conveying condensate generated by the heat exchanger assembly 11 to the evaporation assembly 30, and the evaporation assembly 30 is used for heating and evaporating the condensate conveyed by the condensate outlet pipe 20.

Specifically, the water heater body 10 includes a combustion device 100 and a water pipe assembly, the gas pipe Q, and a smoke exhaust pipe, the water pipe assembly includes a water inlet pipe P1, a water outlet pipe P2, and an intermediate pipe (not shown) connected between the water inlet pipe P1 and the water outlet pipe P2, and the intermediate pipe is connected to the heat exchanger assembly 11. The gas pipe Q is used to supply the combustion apparatus 100 with gas, and the combustion apparatus 100 may have a plurality of flame spray heads, for example, a plurality of flame spray heads arranged in a row, which may heat the heat exchanger assembly 11. The heat exchanger assembly 11 may then transfer heat to the intermediate conduit connected thereto, thereby heating the cold water flowing through the intermediate conduit. The smoke exhaust pipe is used for exhausting the cooled smoke generated in the combustion process of the combustion device 100. Illustratively, the flame jets of the combustion apparatus 100 are arranged linearly or in an array and face the heat exchanger assembly 11 to ensure heating uniformity.

In order to adjust the heating power of the combustion device 100, in one embodiment, a flow control unit K, such as a flow control valve, may be further disposed between the inlet of the gas pipe Q and the combustion device 100, and the supply adjustment of the gas may be performed by the flow control unit K.

It will be appreciated that the water heater body 10 may include a housing 101, the heat exchanger assembly 11 and the evaporation vessel 31 may be located within the housing 101, and the flow control unit K may be located within the housing 101. The water inlet pipe P1 and the water outlet pipe P2 can be respectively connected to different parts of the shell 101, so that a user can only see the smoke exhaust pipe, the water inlet pipe P1, the water outlet pipe P2 and the gas pipe Q when viewing from the outside of the condensing gas water heater, and the beauty of the equipment is guaranteed.

In the working process of the condensing gas water heater, the heat exchanger component 11 is heated after the combustion device 100 of the water heater main body 10 is ignited, and meanwhile, the flue gas generated by the combustion of the combustion device 100 also heats the heat exchanger component 11, so that the temperature of the heat exchanger component 11 is increased; in the process, cold water entering from the water inlet pipe P1 is conveyed to the heat exchanger assembly 11 through the middle pipeline, after heat exchange, heat of the heat exchanger assembly 11 is transferred to the cold water in the middle pipeline, the temperature of the cold water is increased to be high-temperature water, and then the cold water is conveyed to the water outlet pipe P2 through the middle pipeline, so that the cold water flows out of the condensing gas water heater and is supplied to a water end. In addition, the condensed water generated during the heating of the heat exchanger assembly 11 by the flue gas can be delivered to the evaporation assembly 30 through the condensed water lead-out pipe 20, and the condensed water can be vaporized and evaporated under the heating of the evaporation assembly 30, so that the condensed water does not need to be treated in a liquid form.

Because the latent heat of the high-temperature flue gas generated in the ignition process of the combustion device 100 is fully utilized to heat the cold water in the middle pipeline, the heating efficiency of the condensing gas water heater is higher, and meanwhile, the temperature of the flue gas discharged from the condensing gas water heater is lower and the environment is protected.

The condensing gas water heater of the embodiment of the utility model adopts the condensed water eduction tube 20 to be connected between the heat exchanger component 11 and the evaporation component 30, so that condensed water generated by the heat exchanger component 11 is conveyed to the evaporation component 30, and the condensed water is heated and evaporated by the evaporation component 30, so that a special condensed water discharge pipeline is not required to be reserved indoors, the step of wiring a water tube is omitted, the popularization threshold of the condensing gas water heater is reduced, and the practicability is higher.

In one embodiment, the water heater body 10 includes a combustion device 100 and a water pipe assembly, the heat exchanger assembly 11 includes a first heat exchanger 11A, the water pipe assembly includes a first water pipe 41 provided on the first heat exchanger 11A, and the combustion device 100 is used to heat the first heat exchanger 11A.

The combustion device 100 may be disposed below the first heat exchanger 11A, the flame nozzle of the combustion device 100 may face the first heat exchanger 11A above the flame nozzle, and the gas pipe Q may be connected to the combustion device 100 from below the combustion device 100. The water pipe assembly comprises a first water pipe 41 arranged on the first heat exchanger 11A, and the combustion device 100 is used for heating the first heat exchanger 11A, so as to heat water flowing through the first water pipe 41. Illustratively, the first water pipe 41 is coiled around the outer circumferential surface of the first heat exchanger 11A to exchange heat with the first heat exchanger 11A as much as possible.

In order to collect the condensed water generated by the combustion device 100 more conveniently, the heat exchanger assembly 11 further comprises a second heat exchanger 11B, wherein the second heat exchanger 11B is in fluid communication with the first heat exchanger 11A and is disposed above the first heat exchanger 11A. For example, the second heat exchanger 11B is communicated with the first heat exchanger 11A through a flue gas pipeline, or the first heat exchanger 11A and the combustion device 100 are located in one cavity, the second heat exchanger 11B is located in the other cavity, and a passage is formed between the two cavities. The high-temperature flue gas heated by the first heat exchanger 11A can be continuously heated by the second heat exchanger 11B, so that the flue gas is fully utilized for preheating, and the temperature of the finally discharged flue gas is lower.

Illustratively, the water line assembly includes a second water line 42 disposed on the second heat exchanger 11B, the second water line 42 being disposed upstream of the first water line 41 in a waterway. For example, the second water pipe 42 is coiled around the surface of the second heat exchanger 11B to perform better heat exchange with the second heat exchanger 11B.

Since the second water pipe 42 is disposed on the water path at the upstream of the first water pipe 41, the cold water entering from the water inlet pipe P1 flows into the first water pipe 41 after being preheated by the second heat exchanger 11B through the second water pipe 42, and is heated by the first heat exchanger 11A again, so that the cold water can be rapidly heated at the first heat exchanger 11A, the heating efficiency is improved, and the hot water generated after being heated by the first heat exchanger 11A finally flows out from the water outlet pipe P2. Illustratively, the water inlet pipe P1 and the water outlet pipe P2 may be respectively located at the left and right sides of the water heater and below the water heater.

In one embodiment, the condensate outlet pipe 20 is connected directly below the second heat exchanger 11B. It will be appreciated that the condensate outlet pipe 20 may be curved, and that only the evaporation assembly 30 is lower than the second heat exchanger 11B, so as to ensure that the evaporation assembly 30 can collect condensate normally. For example, in some embodiments, the condensate removal tube 20 may be U-shaped, V-shaped, S-shaped, or the like.

The second heat exchanger 11B is disposed obliquely above the first heat exchanger 11A, i.e., is disposed offset from the first heat exchanger 11A in the horizontal direction, so that, on the one hand, the flue gas can naturally heat the second heat exchanger 11B from bottom to top, and, on the other hand, the internal space of the water heater can be reasonably utilized. For example, it may be convenient to connect the condensate water extraction pipe 20 and the evaporation assembly 30 under the second heat exchanger 11B, and the condensate water extraction pipe 20 may be connected directly under the second heat exchanger 11B to collect condensate water as much as possible, avoiding condensate water residue.

By disposing the second heat exchanger 11B obliquely above the first heat exchanger 11A with a displacement, the condensate water extraction pipe 20 may collect condensate water from the second heat exchanger 11B in a substantially vertical manner at one end near the second heat exchanger 11B, and of course, the intermediate portion of the condensate water extraction pipe 20 may have a curved portion in the actual design process. In addition, the evaporation module 30 may be disposed horizontally and side by side with the first heat exchanger 11A, and disposed below or obliquely below the second heat exchanger 11B, so as to utilize the lower space of the water heater as much as possible, thereby realizing a compact design.

It will be appreciated that in other embodiments, the combustion apparatus 100 may be inverted. For example, as shown in fig. 2, there is shown a schematic structural view of another condensing gas water heater according to an embodiment of the present utility model, in which the combustion apparatus 100 is disposed upside down, i.e., the flame spray head of the combustion apparatus 100 is directed downward.

Similar to the embodiment of the upright burner 100, in the embodiment of the inverted burner 100, the water heater body 10 includes the burner 100 and a water pipe assembly, the heat exchanger assembly 11 includes a first heat exchanger 11A, and the water pipe assembly includes a first water pipe 41 provided on the first heat exchanger 11A, and the burner 100 is used to heat the first heat exchanger 11A. But differs in that the first heat exchanger 11A is located below the combustion device 100, and the flame nozzle of the combustion device 100 is directly opposite to the first heat exchanger 11A therebelow.

The condensate outlet pipe 20 may be directly connected to the lower portion of the cavity where the first heat exchanger 11A is located, so as to collect condensate, and the evaporation assembly 30 is further located at the other end of the condensate outlet pipe 20. It will be appreciated that the condensate outlet pipe 20 may be curved, and that the evaporation assembly 30 may be kept lower than the first heat exchanger 11A, so as to ensure that the evaporation assembly 30 can collect condensate normally. For example, in some embodiments, the condensate removal tube 20 may be U-shaped, V-shaped, S-shaped, or the like.

When the combustion device 100 is inverted, only one first heat exchanger 11A is needed, the second heat exchanger 11B is omitted, the first heat exchanger 11A is an efficient heat exchanger, and the condensate water eduction tube 20 and the evaporation component 30 are directly connected to the first heat exchanger 11A.

As shown in fig. 2, during the operation of the condensing gas water heater, the gas pipe Q may be connected to the combustion apparatus 100 from above the combustion apparatus 100. The combustion device 100 of the water heater main body 10 heats the first heat exchanger 11A below the water heater main body after ignition, and meanwhile, flue gas generated by combustion of the combustion device 100 heats the first heat exchanger 11A, so that the temperature of the heat exchanger assembly 11 is increased; in the process, cold water entering from the water inlet pipe P1 is conveyed to the first heat exchanger 11A through the middle pipeline, after heat exchange, the heat of the first heat exchanger 11A is transferred to the cold water in the middle pipeline, the temperature of the cold water is increased to be high-temperature water, and then the cold water is conveyed to the water outlet pipe P2 through the middle pipeline, so that the cold water flows out of the condensing gas water heater and is supplied to a water end. In addition, the condensed water generated during the heating of the heat exchanger assembly 11 by the flue gas can be delivered to the evaporation assembly 30 through the condensed water lead-out pipe 20, and the condensed water can be vaporized and evaporated under the heating of the evaporation assembly 30, so that the condensed water does not need to be treated in a liquid form.

The inverted combustion device 100 can be more beneficial to collecting condensed water, can avoid the condensed water from flowing into the combustion device 100 and rusting the inverted combustion device 100, does not need to be collected through complex transmission, can directly collect at the first time of a combustion chamber (namely a cavity where the combustion device 100 is positioned), thereby avoiding corrosion of other parts in the water heater, avoiding secondary pollution and being more beneficial to prolonging the service life of the water heater.

Fig. 3 shows a schematic structural diagram of an evaporation assembly of a condensing gas water heater according to an embodiment of the utility model.

As further shown in fig. 3, the evaporation module 30 includes an evaporation container 31 and a heating element 32 disposed in the evaporation container 31, the evaporation container 31 has an opening 310 communicating with the outside, and condensed water can be evaporated from the opening 310 after being heated by the heating element 32. The evaporation vessel 31 is a substantially closed vessel, and is only in butt joint with the condensed water eduction tube 20 at one end opening of the condensed water eduction tube 20, and an opening 310 for evaporating and overflowing the condensed water is reserved, so that the acidic components of the flue gas contained in the condensed water are prevented from overflowing the water heater to corrode the shell 101.

The heating element 32 may be a heating wire, a heating net, a heating rod, or the like. For example, the heating element 32 can be made of high-resistance alloy materials such as iron-chromium-aluminum and nickel-chromium electrothermal alloy, has the advantages of high resistivity, small resistance temperature coefficient, long high-temperature-resistant service life, light weight, low price and the like, has excellent high-temperature oxidation resistance, and can be used in an acid gas environment.

In one embodiment, the opening 310 is provided at the top of the evaporation vessel 31. Thus, the acidic vapor generated by evaporation can naturally rise to the top opening 310 at the first time to be discharged, so as to avoid the influence of secondary condensation on the evaporation effect caused by filling the evaporation container 31 with the vapor.

The number of the openings 310 is not limited to one, and may be plural, and the plural openings 310 may be formed at a certain position in a unified manner, thereby improving the steam overflow efficiency.

In one embodiment, as shown in fig. 2, the water heater body 10 includes a smoke exhaust pipe 12, and an opening 310 of the evaporation vessel 31 may be connected to the smoke exhaust pipe 12, so that condensed water evaporated in the evaporation vessel 31 may be collected into the smoke exhaust pipe 12 through the opening 310 and then discharged together with smoke generated by combustion of gas.

In one embodiment, the water heater body 10 includes a housing 101, and the heat exchanger assembly 11 and the evaporation vessel 31 are all located within the housing 101. The evaporation vessel 31 may be connected to the smoke discharge pipe 12 in the housing 101, and only an outlet portion of the smoke discharge pipe 12 may be seen from the outside of the water heater without seeing a connection pipe of the evaporation vessel 31 and the smoke discharge pipe 12.

It will be appreciated that in other embodiments, at least a portion of the connection tube of the evaporation vessel 31 to the smoke evacuation tube 12 may extend out of the housing 101. Alternatively, the connection pipe of the evaporation vessel 31 may be directly drawn out to discharge the evaporated condensed water outside.

In one embodiment, the inner wall of the evaporation container 31 may further have an anti-corrosion layer, or the evaporation container 31 is made of stainless steel, so that the evaporation container 31 is prevented from being corroded by acid gas to affect the normal use of other parts inside the water heater.

Through the arrangement, the embodiment of the application has the following beneficial effects:

1. The cold water in the middle pipeline is heated by fully utilizing the latent heat of the high-temperature flue gas generated in the ignition process of the combustion device, so that the heating efficiency of the condensing gas water heater is higher, and meanwhile, the temperature of the flue gas discharged from the condensing gas water heater is lower and the environment is protected;

2. The condensed water eduction tube is connected between the heat exchanger component and the evaporation component, so that condensed water generated by the heat exchanger component is conveyed to the evaporation component, and the condensed water is heated and evaporated through the evaporation component, so that a special condensed water discharge pipeline is not required to be reserved indoors, the step of wiring the water tube is omitted, the popularization threshold of the condensing gas water heater is reduced, and the practicability is higher;

3. The combustion device can be arranged in the normal direction or inverted direction according to the situation, so that the connection relation between the heat exchanger component and the condensed water eduction tube as well as the evaporation component is adaptively selected, the space inside the gas water heater is reasonably arranged, and the structural compactness is improved;

4. The steam opening of the evaporation assembly is communicated with the smoke exhaust pipe of the water heater, so that condensed water evaporated in the evaporation container is collected to the smoke exhaust pipe from the evaporation assembly and then is discharged together with smoke generated by combustion of fuel gas, corrosion of acid gas to the water heater can be avoided, and the service life of the whole water heater is prolonged;

5. In the condensing gas water heater with the positive-arranged combustion device, the preheating of cold water entering the water heater can be realized by reasonably setting the position relation of a plurality of heat exchangers and the connection relation of the heat exchangers, a condensed water eduction tube and an evaporation assembly and the connection relation of the heat exchangers, a water inlet tube, a water outlet tube and a middle pipeline, so that the heating efficiency of the water heater is improved.

The foregoing is merely illustrative of the embodiments of this application and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the application, and it is intended to cover all modifications and variations as fall within the scope of the application.

Claims (10)

1. The utility model provides a condensation type gas heater, its characterized in that includes water heater main part (10), comdenstion water eduction tube (20) and evaporation subassembly (30), water heater main part (10) include heat exchanger subassembly (11), comdenstion water eduction tube (20) are connected between heat exchanger subassembly (11) with evaporation subassembly (30), be used for with comdenstion water that heat exchanger subassembly (11) produced is carried to evaporation subassembly (30), evaporation subassembly (30) are used for the heating evaporation comdenstion water that comdenstion water eduction tube (20) carried.

2. The condensing gas water heater according to claim 1, wherein the evaporation assembly (30) comprises an evaporation container (31) and a heating element (32) arranged in the evaporation container (31), the evaporation container (31) is provided with an opening (310) communicated with the outside, and condensed water can be evaporated from the opening (310) after being heated by the heating element (32).

3. The condensing gas water heater according to claim 2, characterized in that the opening (310) is open at the top of the evaporation vessel (31).

4. A condensing gas water heater according to claim 3, characterized in that the water heater body (10) comprises a smoke evacuation tube (12), the opening (310) communicates with the smoke evacuation tube (12), and condensed water evaporated in the evaporation vessel (31) can be collected from the opening (310) to the smoke evacuation tube (12) for evacuation.

5. The condensing gas water heater of claim 4, wherein the water heater body (10) comprises a housing (101), and wherein the heat exchanger assembly (11) and the evaporation vessel (31) are both located within the housing (101).

6. Condensing gas water heater according to claim 2, characterized in that the evaporation vessel (31) is arranged below the heat exchanger assembly (11) and/or that the condensate water lead-out pipe (20) is connected to the bottom of the heat exchanger assembly (11).

7. A condensing gas water heater according to any of claims 1-6, characterized in that the water heater body (10) comprises a combustion device (100) and a water tube assembly, the heat exchanger assembly (11) comprising a first heat exchanger (11A), the water tube assembly comprising a first water tube (41) provided on the first heat exchanger (11A), the combustion device (100) being adapted to heat the first heat exchanger (11A).

8. The condensing gas water heater according to claim 7, characterized in that the combustion device (100) is arranged above or below the first heat exchanger (11A), and the flame nozzle of the combustion device (100) is directed towards the first heat exchanger (11A).

9. The condensing gas water heater according to claim 7, characterized in that the heat exchanger assembly (11) further comprises a second heat exchanger (11B), the second heat exchanger (11B) being in fluid communication with the first heat exchanger (11A) and being provided above the first heat exchanger (11A); the water pipe assembly comprises a second water pipe (42) arranged on the second heat exchanger (11B), and the second water pipe (42) is arranged on the water path at the upstream of the first water pipe (41).

10. The condensing gas water heater according to claim 9, characterized in that the condensate water lead-out pipe (20) is connected below the second heat exchanger (11B).