Condensation type gas water heater

Abstract

The invention relates to the technical field of household appliances, and discloses a condensation type gas water heater which comprises a water heater body, a condensate water outlet pipe and an evaporation assembly, the water heater body comprises a heat exchanger assembly, and the condensate water outlet pipe is connected between the heat exchanger assembly and the evaporation assembly. The condensate water outlet pipe is used for conveying condensate water generated by the heat exchanger assembly to the evaporation assembly, and the evaporation assembly is used for heating and evaporating the condensate water conveyed by the condensate water outlet pipe. According to the condensation type gas water heater, the condensate water outlet pipe is connected between the heat exchanger assembly and the evaporation assembly, so that the condensate water generated by the heat exchanger assembly is conveyed to the evaporation assembly, the condensate water is heated and evaporated through the evaporation assembly, a special condensate water discharging pipeline does not need to be reserved indoors, the step of water pipe wiring is omitted, and the production cost is reduced. And the popularization threshold of the condensation type gas water heater is lowered, and the practicability is higher.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a condensing gas water heater. Background Art

[0002] Condensing water heaters are one of the most energy-saving and environmentally friendly products currently. When ordinary gas water heaters are working, the exhaust gas temperature is as high as 180°C, while the exhaust gas temperature of condensing water heaters is only about 60°C. Compared with ordinary gas water heaters, condensing gas water heaters are equipped with condensing heat exchangers, which absorb the energy in the high-temperature flue gas to preheat the cold water. Since the heat for preheating the cold water is not obtained by burning gas, but by utilizing the heat in the flue gas that cannot be recovered. Therefore, condensing water heaters improve the heat conversion efficiency, achieve energy-saving effects, save gas, and are more environmentally friendly.

[0003] Since the condensing water heater needs to lower the exhaust temperature in the process of utilizing the latent heat in the flue gas, condensed water will be produced. Therefore, a special condensed water discharge pipe needs to be reserved indoors to lead the condensed water to the outdoors, which makes the pipeline wiring complicated and greatly reduces its practicality. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a condensing gas water heater, which does not require the additional arrangement of a condensation drain pipe leading to the outdoors, thereby improving the practicality of the product.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A condensing gas water heater comprises a water heater body, a condensed water outlet pipe and an evaporation component, wherein the water heater body comprises a heat exchanger component, the condensed water outlet pipe is connected between the heat exchanger component and the evaporation component and is used to transport the condensed water generated by the heat exchanger component to the evaporation component, and the evaporation component is used to heat and evaporate the condensed water transported by the condensed water outlet pipe.

[0007] As one embodiment, the evaporation component includes an evaporation container and a heating element disposed in the evaporation container. The evaporation container has an opening connected to the outside. Condensed water can be heated by the heating element and evaporated from the opening.

[0008] As one implementation manner, the opening is opened at the top of the evaporation container.

[0009] As one embodiment, the water heater body includes a smoke exhaust pipe, the opening is connected to the smoke exhaust pipe, and the condensed water evaporated in the evaporation container can be collected from the opening and discharged from the smoke exhaust pipe.

[0010] As one embodiment, the water heater body includes a shell, and the heat exchanger assembly and the evaporation container are both located in the shell.

[0011] As one embodiment, the evaporation container is arranged below the heat exchanger assembly, and / or the condensed water outlet pipe is connected to the bottom of the heat exchanger assembly.

[0012] As one embodiment, the water heater body includes a combustion device and a water pipe assembly, the heat exchanger assembly includes a first heat exchanger, the water pipe assembly includes a first water pipe arranged on the first heat exchanger, and the combustion device is used to heat the first heat exchanger.

[0013] As one implementation manner, the combustion device is disposed above or below the first heat exchanger, and a flame nozzle of the combustion device faces the first heat exchanger.

[0014] As one embodiment, the heat exchanger assembly also includes a second heat exchanger, which is fluidically connected to the first heat exchanger and is arranged above the first heat exchanger; the water pipe assembly includes a second water pipe arranged on the second heat exchanger, and the second water pipe is arranged upstream of the first water pipe on the waterway.

[0015] As one implementation manner, the condensate outlet pipe is connected below the second heat exchanger.

[0016] The condensing gas water heater of the present invention adopts a condensed water outlet pipe connected between the heat exchanger component and the evaporation component, so as to transport the condensed water generated by the heat exchanger component to the evaporation component, and the condensed water is heated and evaporated by the evaporation component. Therefore, there is no need to reserve a special condensed water discharge pipe indoors, the step of water pipe wiring is omitted, the popularization threshold of condensing gas water heaters is lowered, and the practicality is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a condensing gas water heater according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic structural diagram of another condensing gas water heater according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic structural diagram of an evaporation assembly of a condensing gas water heater according to an embodiment of the present invention is shown;

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] In the present invention, the terms "disposed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Figure 1 A structural schematic diagram of a condensing gas water heater according to an embodiment of the present invention is shown.

[0027] See also Figure 1The embodiment of the present application provides a condensing gas water heater, which mainly includes a water heater body 10, a condensed water outlet pipe 20 and an evaporation component 30, wherein the water heater body 10 includes a heat exchanger component 11, and the condensed water outlet pipe 20 is connected between the heat exchanger component 11 and the evaporation component 30. The condensed water outlet pipe 20 is used to transport the condensed water generated by the heat exchanger component 11 to the evaporation component 30, and the evaporation component 30 is used to heat and evaporate the condensed water transported by the condensed water outlet pipe 20.

[0028] Specifically, the water heater body 10 includes a combustion device 100 and a water pipe assembly, a gas pipe Q, and a smoke exhaust pipe. The water pipe assembly includes an inlet pipe P1, an outlet pipe P2, and an intermediate pipe (not shown) connected between the inlet pipe P1 and the outlet pipe P2. The intermediate pipe is connected to the heat exchanger assembly 11. The gas pipe Q is used to supply gas to the combustion device 100. The combustion device 100 can have a plurality of flame nozzles. For example, the plurality of flame nozzles are arranged in a row, and the heat exchanger assembly 11 can be heated. The heat exchanger assembly 11 can transfer heat to the intermediate pipe connected thereto, thereby heating the cold water flowing through the intermediate pipe. The smoke exhaust pipe is used to discharge the cooled smoke generated during the combustion of the combustion device 100. Exemplarily, the flame nozzles of the combustion device 100 are arranged linearly or in an array, and are directly opposite to the heat exchanger assembly 11, which can ensure heating uniformity.

[0029] In order to adjust the heating power of the combustion device 100, in one embodiment, a flow control unit K, such as a flow regulating valve, may be provided between the inlet of the gas pipe Q and the combustion device 100, and the flow control unit K may be used to adjust the supply of the gas.

[0030] It is understandable that the water heater body 10 may include a housing 101, the heat exchanger assembly 11 and the evaporation container 31 may be located in the housing 101, and the flow control unit K may also be located in the housing 101. The water inlet pipe P1 and the water outlet pipe P2 may be connected to different parts of the housing 101, respectively, so that from the outside of the condensing gas water heater, the user can only see the exhaust pipe, the water inlet pipe P1, the water outlet pipe P2, and the gas pipe Q, which is conducive to ensuring the aesthetics of the equipment.

[0031] During the operation of the condensing gas water heater, the combustion device 100 of the water heater body 10 heats the heat exchanger assembly 11 after ignition. At the same time, the flue gas generated by the combustion of the combustion device 100 also heats the heat exchanger assembly 11, causing the temperature of the heat exchanger assembly 11 to rise. During this process, the cold water entering from the water inlet pipe P1 is transported to the heat exchanger assembly 11 through the intermediate pipe. After heat exchange, the heat of the heat exchanger assembly 11 is transferred to the cold water in the intermediate pipe. The cold water temperature rises and becomes high-temperature water. It is then transported to the water outlet pipe P2 through the intermediate pipe, thereby flowing out of the condensing gas water heater and supplied to the water use end. In addition, the condensed water generated during the process of the flue gas heating the heat exchanger assembly 11 can be transported to the evaporation assembly 30 through the condensed water outlet pipe 20. Under the heating of the evaporation assembly 30, the condensed water can be vaporized and evaporated, and no longer needs to be processed in liquid form.

[0032] Since the latent heat of the high-temperature flue gas generated during the ignition process of the combustion device 100 is fully utilized to heat the cold water in the middle pipe, the heating efficiency of the condensing gas water heater is higher. At the same time, the flue gas discharged from the condensing gas water heater is lower in temperature and more environmentally friendly.

[0033] The condensing gas water heater in the embodiment of the present invention adopts a condensed water outlet pipe 20 connected between the heat exchanger assembly 11 and the evaporation assembly 30, so as to transport the condensed water generated by the heat exchanger assembly 11 to the evaporation assembly 30, and the condensed water is heated and evaporated by the evaporation assembly 30, thereby eliminating the need to reserve a special condensed water discharge pipe indoors, eliminating the step of water pipe wiring, lowering the popularization threshold of condensing gas water heaters, and improving practicality.

[0034] 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 arranged on the first heat exchanger 11A, and the combustion device 100 is used to heat the first heat exchanger 11A.

[0035] The combustion device 100 may be disposed below the first heat exchanger 11A, the flame nozzle of the combustion device 100 faces the first heat exchanger 11A above it, and the gas pipe Q may be connected to the combustion device 100 from below the combustion device 100. The water pipe assembly includes a first water pipe 41 disposed on the first heat exchanger 11A, and the combustion device 100 is used to heat the first heat exchanger 11A, thereby heating the water flowing through the first water pipe 41. Exemplarily, the first water pipe 41 is coiled on the outer peripheral surface of the first heat exchanger 11A to perform heat exchange with the first heat exchanger 11A as much as possible.

[0036] In order to more conveniently collect the condensed water generated by the combustion device 100, the heat exchanger assembly 11 further includes a second heat exchanger 11B, which is fluidically connected to the first heat exchanger 11A and is disposed above the first heat exchanger 11A. For example, the second heat exchanger 11B is connected to the first heat exchanger 11A through a flue gas duct, or the first heat exchanger 11A and the combustion device 100 are located in one cavity, and the second heat exchanger 11B is located in another cavity, and a passage is formed between the two cavities. The high-temperature flue gas heated by the first heat exchanger 11A can continue to heat the second heat exchanger 11B, thereby making full use of the flue gas preheating, so that the temperature of the flue gas finally discharged is lower.

[0037] Exemplarily, the water pipe assembly includes a second water pipe 42 disposed on the second heat exchanger 11B, and the second water pipe 42 is disposed upstream of the first water pipe 41 in the waterway. For example, the second water pipe 42 is coiled on the surface of the second heat exchanger 11B to better exchange heat with the second heat exchanger 11B.

[0038] Since the second water pipe 42 is arranged upstream of the first water pipe 41 on the waterway, the cold water entering from the water inlet pipe P1 first passes through the second water pipe 42, is preheated by the second heat exchanger 11B, flows into the first water pipe 41, and is heated again by the first heat exchanger 11A, so that the cold water can be quickly heated at the first heat exchanger 11A, improving the heating efficiency, and the hot water generated after being heated by the first heat exchanger 11A finally flows out from the water outlet pipe P2. Exemplarily, the water inlet pipe P1 and the water outlet pipe P2 can be located on the left and right sides of the water heater, respectively, and located below the water heater.

[0039] In one embodiment, the condensate outlet pipe 20 is connected to the lower part of the second heat exchanger 11B. It is understood that the condensate outlet pipe 20 can be curved, and as long as the evaporation assembly 30 is lower than the second heat exchanger 11B, the evaporation assembly 30 can collect the condensate normally. For example, in some embodiments, the condensate outlet pipe 20 can be U-shaped, V-shaped, S-shaped, etc.

[0040] For example, the second heat exchanger 11B is disposed obliquely above the first heat exchanger 11A, that is, it is displaced from the first heat exchanger 11A in the horizontal direction. 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 is convenient to connect the condensed water outlet pipe 20 and the evaporation assembly 30 below the second heat exchanger 11B, and the condensed water outlet pipe 20 can be connected directly below the second heat exchanger 11B to collect condensed water as much as possible to avoid condensed water residue.

[0041] By displacing the second heat exchanger 11B above the first heat exchanger 11A, the condensed water outlet pipe 20 can collect condensed water from the second heat exchanger 11B in a substantially vertical manner at one end close to the second heat exchanger 11B. Of course, in the actual design process, the middle portion of the condensed water outlet pipe 20 can also have a curved portion. In addition, the evaporation assembly 30 can also be arranged horizontally side by side with the first heat exchanger 11A and be arranged below or obliquely below the second heat exchanger 11B, so as to make full use of the lower space of the water heater and achieve a compact design.

[0042] It is understandable that in other embodiments, the combustion device 100 may also be inverted. Figure 2 , which is a schematic structural diagram of another condensing gas water heater according to an embodiment of the present invention. In this embodiment, the combustion device 100 is inverted, that is, the flame nozzle of the combustion device 100 faces downward.

[0043] Similar to the embodiment of the upright combustion device 100, in the embodiment of the inverted combustion device 100, the water heater body 10 includes the 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 disposed on the first heat exchanger 11A, and the combustion device 100 is used to heat the first heat exchanger 11A. However, the difference is that the first heat exchanger 11A is located below the combustion device 100, and the flame nozzle of the combustion device 100 is directly facing the first heat exchanger 11A below it.

[0044] The condensate outlet pipe 20 can be directly connected to the lower part of the cavity where the first heat exchanger 11A is located to collect the condensate, and the evaporation assembly 30 is further located at the other end of the condensate outlet pipe 20. It is understandable that the condensate outlet pipe 20 can be curved, and as long as the evaporation assembly 30 is lower than the first heat exchanger 11A, the evaporation assembly 30 can achieve normal collection of the condensate. For example, in some embodiments, the condensate outlet pipe 20 can be U-shaped, V-shaped, S-shaped, etc.

[0045] When the combustion device 100 is inverted, only one first heat exchanger 11A is required, and the second heat exchanger 11B is omitted. The first heat exchanger 11A is a high-efficiency heat exchanger, and the condensate outlet pipe 20 and the evaporation component 30 are directly connected to the first heat exchanger 11A.

[0046] like Figure 2As shown, during the operation of the condensing gas water heater, the gas pipe Q can be connected to the combustion device 100 from above the combustion device 100. After the combustion device 100 of the water heater body 10 is ignited, the first heat exchanger 11A below it is heated. At the same time, the flue gas generated by the combustion of the combustion device 100 also heats the first heat exchanger 11A, so that the temperature of the heat exchanger assembly 11 increases; in this process, the cold water entering from the water inlet pipe P1 is transported to the first heat exchanger 11A through the intermediate pipe. After heat exchange, the heat of the first heat exchanger 11A is transferred to the cold water in the intermediate pipe. The temperature of the cold water increases and becomes high-temperature water, and then it is transported to the water outlet pipe P2 through the intermediate pipe, so as to flow out of the condensing gas water heater and supplied to the water use end. In addition, the condensed water generated in the process of the flue gas heating the heat exchanger assembly 11 can be transported to the evaporation assembly 30 through the condensed water outlet pipe 20. Under the heating of the evaporation assembly 30, the condensed water can be vaporized and evaporated, and no longer needs to be treated in liquid form.

[0047] The inverted combustion device 100 can be more conducive to the collection of condensed water, and can prevent condensed water from flowing into the combustion device 100 and causing rust. The condensed water does not need to be collected through complicated transmission, and can be collected directly in the combustion chamber (i.e., the cavity where the combustion device 100 is located) at the first time, thereby avoiding corrosion of other components in the water heater, avoiding secondary pollution, and being more conducive to improving the service life of the water heater.

[0048] Figure 3 A schematic structural diagram of an evaporation assembly of a condensing gas water heater according to an embodiment of the present invention is shown.

[0049] Further integration Figure 3 As shown, the evaporation assembly 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 connected to the outside, and the condensed water can be heated by the heating element 32 and evaporated from the opening 310. The evaporation container 31 is a substantially closed container, with only one end of the condensed water outlet pipe 20 being opened to connect with the condensed water outlet pipe 20, and an opening 310 is reserved for the condensed liquid to evaporate and overflow, so as to prevent the acidic components of the flue gas contained in the condensed liquid from overflowing into the water heater and corroding the shell 101.

[0050] The heating element 32 may be a heating wire, a heating net, or a heating rod, etc. For example, the heating element 32 may be made of high-resistance alloy materials such as iron-chromium-aluminum and nickel-chromium electric heating alloy, which have the advantages of high resistivity, small temperature coefficient of resistance, long high-temperature life, light weight, low price, etc., and has excellent high-temperature oxidation resistance and can be used in an acidic gas environment.

[0051] In one embodiment, the opening 310 is opened at the top of the evaporation container 31. In this way, the acidic water vapor generated by evaporation can naturally rise to the top opening 310 and be discharged immediately, thereby preventing the steam from filling the evaporation container 31 and causing secondary condensation to affect the evaporation effect.

[0052] In addition, the number of the openings 310 is not limited to one, but may be multiple, and multiple openings 310 may be uniformly formed at a certain location to improve the overflow efficiency of steam.

[0053] In one embodiment, Figure 2 The water heater body 10 includes a smoke exhaust pipe 12, and the opening 310 of the evaporation container 31 can be connected to the smoke exhaust pipe 12, so that the condensed water evaporated in the evaporation container 31 can be collected from the opening 310 to the smoke exhaust pipe 12, and then discharged together with the smoke generated by the combustion of gas.

[0054] In one embodiment, the water heater body 10 includes a shell 101, and the heat exchanger assembly 11 and the evaporation container 31 are both located in the shell 101. The evaporation container 31 can be connected to the smoke exhaust pipe 12 in the shell 101, and only the outlet portion of the smoke exhaust pipe 12 can be seen from the outside of the water heater, but the connection pipe between the evaporation container 31 and the smoke exhaust pipe 12 cannot be seen.

[0055] It is understandable that in other embodiments, at least part of the connecting pipe between the evaporation container 31 and the smoke exhaust pipe 12 may be extended outside the housing 101. Alternatively, the connecting pipe of the evaporation container 31 may be directly led out to discharge the evaporated condensed water outdoors.

[0056] In one embodiment, the inner wall of the evaporation container 31 may also have an anti-corrosion layer, or the evaporation container 31 is made of stainless steel, which can prevent the evaporation container 31 from being corroded by acidic gas and affecting the normal use of other components inside the water heater.

[0057] Through the above configuration, the embodiment of the present application has the following beneficial effects:

[0058] 1. Since the latent heat of the high-temperature flue gas generated during the ignition process of the combustion device is fully utilized to heat the cold water in the middle pipe, the heating efficiency of the condensing gas water heater is higher. At the same time, the flue gas temperature discharged from the condensing gas water heater is lower and more environmentally friendly;

[0059] 2. The condensed water outlet pipe is connected between the heat exchanger assembly and the evaporation assembly, so that the condensed water generated by the heat exchanger assembly is transported to the evaporation assembly, and the condensed water is heated and evaporated by the evaporation assembly, so there is no need to reserve a special condensed water discharge pipe indoors, which saves the steps of water pipe wiring, reduces the popularization threshold of condensing gas water heaters, and is more practical;

[0060] 3. The combustion device can be placed upright or inverted according to the situation, so as to adaptably select the connection relationship between the heat exchanger assembly, the condensed water outlet pipe, and the evaporation assembly, reasonably arrange the space inside the gas water heater, and improve the compactness of the structure;

[0061] 4. By connecting the steam opening of the evaporation component to the exhaust pipe of the water heater, the condensed water evaporated in the evaporation container can be collected from the evaporation component to the exhaust pipe, and then discharged together with the flue gas generated by the combustion of gas, thereby avoiding corrosion of the water heater caused by acidic gas and prolonging the service life of the water heater as a whole;

[0062] 5. In a condensing gas water heater with an upright combustion device, by reasonably setting the positional relationship of multiple heat exchangers, as well as the connection relationship between the heat exchanger and the condensed water outlet pipe and the evaporation component, and the connection relationship between multiple heat exchangers and the water inlet pipe, water outlet pipe, and intermediate pipeline, the cold water entering the water heater can be preheated, thereby improving the heating efficiency of the water heater.

[0063] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A condensing gas water heater, It is characterized in that The invention comprises a water heater body (10), a condensed water outlet pipe (20) and an evaporation component (30), wherein the water heater body (10) comprises a heat exchanger component (11), the condensed water outlet pipe (20) is connected between the heat exchanger component (11) and the evaporation component (30) and is used for conveying condensed water generated by the heat exchanger component (11) to the evaporation component (30), and the evaporation component (30) is used for heating and evaporating the condensed water conveyed by the condensed water outlet pipe (20).

2. The condensing gas water heater according to claim 1, It is characterized in that The evaporation component (30) comprises an evaporation container (31) and a heating element (32) arranged in the evaporation container (31); the evaporation container (31) has an opening (310) communicating with the outside; condensed water can be heated by the heating element (32) and then evaporated from the opening (310).

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

4. The condensing gas water heater according to claim 3, It is characterized in that The water heater body (10) comprises a smoke exhaust pipe (12), the opening (310) is connected to the smoke exhaust pipe (12), and the condensed water evaporated in the evaporation container (31) can be collected from the opening (310) to the smoke exhaust pipe (12) for discharge.

5. The condensing gas water heater according to claim 4, It is characterized in that The water heater body (10) comprises a shell (101), and the heat exchanger assembly (11) and the evaporation container (31) are both located in the shell (101).

6. The condensing gas water heater according to claim 2, It is characterized in that The evaporation container (31) is arranged below the heat exchanger assembly (11), and / or the condensed water outlet pipe (20) is connected to the bottom of the heat exchanger assembly (11).

7. The condensing gas water heater according to any one of claims 1 to 6, It is characterized in that The water heater body (10) comprises a combustion device (100) and a water pipe assembly, the heat exchanger assembly (11) comprises a first heat exchanger (11A), the water pipe assembly comprises a first water pipe (41) arranged on the first heat exchanger (11A), and the combustion device (100) is used to heat the first heat exchanger (11A).

8. The condensing gas water heater according to claim 7, It is 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) faces the first heat exchanger (11A).

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

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

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