Balanced gas-fired water heating apparatus

Abstract

This utility model relates to the field of hot water equipment technology and discloses a balanced gas-fired hot water equipment. It includes a casing with an opening, an inner flue pipe extending into the casing through the opening, and an outer flue pipe fitted over the inner flue pipe and mounted on the casing. A first air inlet channel is formed between the inner wall of the outer flue pipe and the outer wall of the inner flue pipe. Along the height of the casing, a rainwater collection tray is installed inside the casing and fitted over the lower end of the inner flue pipe, with the lower end of the outer flue pipe above the rainwater collection tray. This tray collects rainwater sliding down the inner wall of the lower end of the outer flue pipe. A second air inlet channel is formed between the inner wall of the rainwater collection tray and the outer wall of the inner flue pipe, with the inlet of the second air inlet channel opposite to the outlet of the first air inlet channel. This utility model effectively collects rainwater entering through the first air inlet channel and reduces the impact of the rainwater collection tray on the outlet resistance, lowering the outlet resistance and allowing the equipment to intake air normally, thus ensuring its operating performance.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment technology and discloses a balanced gas-fired hot water equipment. Background Technology

[0002] Balanced-flue gas water heating systems, such as balanced-flue gas water heaters and balanced-flue wall-hung boilers, are characterized by a coaxial, double-layered balanced flue structure. The inner pipe serves as the exhaust channel, while the outer pipe forms an air intake channel between the inner and outer pipes, allowing combustion air to be drawn in from the outside and exhausted outdoors. During operation, to prevent rainwater from entering the system through the air intake channel's outlet, which could cause water ingress and damage to components, a rainwater collection tray is typically installed on the outer wall of the inner flue. The air intake channel's outlet is positioned opposite this tray to collect rainwater. However, the airflow at the outlet impacts the rainwater collection tray, changing its direction and causing the rainwater to flow out between the tray and the top wall of the boiler casing. This increases airflow resistance, affecting the boiler's normal air intake and ultimately reducing its performance. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a balanced gas water heater, which effectively solves the problem of high air resistance at the air outlet of the air inlet channel while preventing rainwater from entering the balanced gas water heater.

[0004] The above-mentioned technical problems are solved by the following technical solutions:

[0005] A balanced flue gas water heater includes:

[0006] Shell, inner flue pipe, outer flue pipe, and rainwater collection tray;

[0007] The housing has an opening, one end of the inner tube of the flue passes through the opening and extends into the housing, the outer tube of the flue is sleeved on the outside of the inner tube of the flue and installed on the housing, and a first air inlet channel is formed between the inner wall of the outer tube of the flue and the outer wall of the inner tube of the flue.

[0008] Along the height direction of the housing, the rainwater collection tray is installed inside the housing and sleeved on the lower end of the inner tube of the flue pipe. The lower end of the outer tube of the flue pipe is located above the rainwater collection tray and is used to collect rainwater that slides down from the inner wall of the lower end of the outer tube of the flue pipe. A second air inlet channel is provided between the inner wall of the rainwater collection tray and the outer wall of the inner tube of the flue pipe. The air inlet of the second air inlet channel is opposite to the air outlet of the first air inlet channel.

[0009] Compared with the prior art, the balanced gas water heater of this invention has the following advantages: The lower end of the outer flue pipe is positioned above the rainwater collection tray, allowing rainwater entering from the first air inlet channel to flow along the inner wall of the outer flue pipe into the rainwater collection tray, thus preventing rainwater from entering the balanced gas water heater. Furthermore, the rainwater collection tray is fitted over the lower end of the inner flue pipe, and a second air inlet channel is provided between the inner wall of the rainwater collection tray and the outer wall of the inner flue pipe. This provides sufficient space for gas flow, allowing some of the airflow entering the casing from the outlet of the first air inlet channel to directly enter through the second air inlet channel. This avoids the airflow entering from the outlet of the first air inlet channel directly impacting the rainwater collection tray, thereby reducing the impact of the rainwater collection tray on the outlet resistance and lowering the outlet resistance at the outlet of the first air inlet channel. This allows the balanced gas water heater to receive air normally, ensuring its operational performance.

[0010] In one embodiment, the rainwater collection tray includes a collection tray body and a first baffle and a second baffle extending upward from opposite sides of the collection tray body, respectively, with a water collection trough formed between the first baffle and the second baffle; along the height direction of the housing, the lower end face of the outer pipe of the flue is projected onto the horizontal plane within the horizontal projection range of the opening of the water collection trough.

[0011] In one embodiment, the water collection tank includes a first tank section, a second tank section, and a third tank section. A first transition section is inclined between the first tank section and the second tank section, a second transition section is inclined between the second tank section and the third tank section, and a third transition section is inclined between the third tank section and the first tank section. Along the height direction of the shell, the height of the first tank section is greater than the height of the second tank section, and the height of the second tank section is greater than the height of the third tank section.

[0012] In one embodiment, the rainwater collection tray is further provided with a rainwater drain outlet, which is located at one end of the third trough section away from the second trough section, and a rainwater drain pipe is connected to the rainwater drain outlet.

[0013] In one embodiment, an air inlet is provided in the middle of the main body of the collection tray, and the lower end of the inner tube of the flue is located inside the air inlet.

[0014] In one embodiment, a condenser is further included, the condenser comprising a condenser housing, a smoke inlet on the side wall of the condenser housing, and a smoke exhaust outlet on the top of the condenser housing, the smoke exhaust outlet being connected to the inner tube of the flue pipe.

[0015] In one embodiment, the outer periphery of the rainwater collection tray is provided with a plurality of connecting ears, each of the connecting ears being provided with a through hole, and the rainwater collection tray is installed on the condenser housing by a plurality of fasteners passing through the plurality of through holes one by one.

[0016] In one embodiment, the fastener includes a snap fastener, which includes a connecting body and a limiting portion disposed on the connecting body. One end of the connecting body is connected to the condenser housing, and the other end is connected to the limiting portion.

[0017] In one embodiment, the condenser housing is further provided with a condensate drain outlet, which is located at the bottom of the condenser housing and is connected to a condensate drain pipe.

[0018] In one embodiment, a water collector is also included, which includes a rainwater collection port and a condensate collection port, the rainwater collection port being connected to the rainwater drain pipe and the condensate collection port being connected to the condensate drain pipe. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a balanced gas-fired water heater according to an embodiment of the present invention;

[0021] Figure 2 This is a partial cross-sectional view of a balanced gas-fired water heater according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the condenser and rainwater collection tray in a balanced gas-fired water heater according to an embodiment of the present invention;

[0023] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0024] Figure 5 This is a schematic diagram of the structure of a rainwater collection tray in a balanced gas-fired hot water device according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the water collector in a balanced gas-fired hot water device according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Condenser; 11. Condenser shell; 12. Clip; 121. Connecting body; 122. Limiting part; 13. Smoke inlet; 14. Smoke outlet; 15. Condensate drain outlet; 2. Rainwater collection tray; 21. Air inlet; 22. Water collection trough; 221. First trough section; 222. Second trough section; 223. Third trough section; 224. First transition section; 225. Second transition section; 226. Third transition section; 23. 24. Rainwater drain outlet; 25. First retaining edge; 26. Second retaining edge; 27. Connecting lug; 28. Through hole; 3. Rainwater drain pipe; 4. Water collector; 48. Rainwater collection port; 49. Condensate collection port; 50. Condensate drain pipe; 61. Inner pipe of flue; 62. Outer pipe of flue; 7. Sealing ring; 100. Housing; 101. Opening; 102. First air inlet channel; 103. Second air inlet channel; 104. Air outlet. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] According to embodiments of the present invention, such as Figures 1 to 6As shown, a balanced gas-fired water heater is provided, including: a shell 100, an inner flue pipe 61, an outer flue pipe 62, and a rainwater collection tray 2; the shell 100 has an opening 101, one end of the inner flue pipe 61 passes through the opening 101 and extends into the shell 100, the outer flue pipe 62 is sleeved on the outside of the inner flue pipe 61 and installed on the shell 100, and a first air inlet channel 102 is formed between the inner wall of the outer flue pipe 62 and the outer wall of the inner flue pipe 61; along the shell In the vertical direction (up and down direction in the figure), the rainwater collection tray 2 is installed inside the housing 100 and sleeved on the lower end of the inner tube 61 of the flue. The lower end of the outer tube 62 of the flue is located above the rainwater collection tray 2 and is used to collect rainwater that slides down from the inner wall of the lower end of the outer tube 62. A second air inlet channel 103 is left between the inner wall of the rainwater collection tray 2 and the outer wall of the inner tube 61 of the flue. The air inlet of the second air inlet channel 103 is opposite to the air outlet 104 of the first air inlet channel 102.

[0031] In this embodiment, the housing 100 is the external structure of the balanced gas water heater, used to house the various components of the balanced gas water heater. An opening 101 is provided at the top of the housing 100, the diameter of which is slightly larger than the outer diameter of the inner flue pipe 61, allowing the inner flue pipe 61 to pass through the housing 100. One end of the inner flue pipe 61 extends through the opening 101 at the top of the housing 100 into the interior of the housing 100, and the other end extends into the exterior of the housing 100. The inner flue pipe 61 is used to discharge the flue gas generated by the combustion of the balanced gas water heater. An outer flue pipe 62 is installed on the housing 100, forming a stable connection with it. The outer flue pipe 62 is sleeved on the outside of the inner flue pipe 61, forming a first air inlet channel 102 between them. This first air inlet channel 102 allows external airflow, enabling airflow to flow along the first air inlet channel 102 and enter the balanced gas water heater from the air outlet 104 of the first air inlet channel 102.

[0032] Furthermore, the rainwater collection tray 2 is installed inside the housing 100 and fitted onto the lower end of the inner pipe 61 of the flue. This allows the rainwater collection tray 2 to collect rainwater entering from outside the flue, preventing rainwater from entering the balanced gas water heater and thus avoiding damage to components. A second air inlet channel 103 is provided between the inner wall of the rainwater collection tray 2 and the outer wall of the flue pipe 61. The second air inlet channel 103 is opposite to the air outlet 104 of the first air inlet channel 102. The second air inlet channel 103 provides sufficient space for gas flow, so that part of the airflow entering the housing 100 from the air outlet 104 of the first air inlet channel 102 can directly enter the interior of the housing 100 from the second air inlet channel 103. This avoids the airflow entering from the air outlet 104 of the first air inlet channel 102 directly impacting the rainwater collection tray 2, thereby reducing the impact of the rainwater collection tray 2 on the air outlet resistance and reducing the air outlet resistance at the air outlet 104 of the first air inlet channel 102. This allows the balanced gas water heater to have normal air intake, ensuring the working performance of the balanced gas water heater. By placing the lower end of the flue pipe 62 above the rainwater collection tray 2, and ensuring that the orthographic projection of the lower end of the flue pipe 62 is within the range of the rainwater collection tray 2, rainwater entering from the first air inlet channel 102 can flow along the inner wall of the flue pipe 62 into the rainwater collection tray 2, thereby preventing rainwater from entering the interior of the balanced gas water heater and ensuring that the balanced gas water heater can operate normally.

[0033] like Figure 5 As shown, in one embodiment, the rainwater collection tray 2 includes a collection tray body and a first baffle 24 and a second baffle 25 extending upward from opposite sides of the collection tray body, respectively, forming a water collection trough 22 between the first baffle 24 and the second baffle 25; along the height direction of the housing 100, the lower end face of the flue pipe 62 is projected onto the horizontal plane within the horizontal projection range of the opening of the water collection trough 22.

[0034] In this embodiment, the main body of the collection tray is approximately a circular planar structure, and the diameter of the main body of the collection tray is larger than the diameter of the outer pipe 62 of the flue. This ensures that the main body of the collection tray can completely cover the lower projection area of ​​the outer pipe 62, allowing rainwater entering the annular channel to flow along the inner wall of the outer pipe 62 to the main body of the collection tray. The main body of the collection tray supports the first baffle 24 and the second baffle 25, which extend upward from opposite sides of the main body of the collection tray to form a U-shaped structure, which is the water collection trough 22. Along the height direction of the housing 100, the lower end face of the outer pipe 62 is projected onto the horizontal plane within the horizontal projection range of the opening of the water collection trough 22, thereby collecting rainwater dripping from the lower end of the outer pipe 62. This prevents rainwater from entering the interior of the balanced gas water heater and also avoids rainwater from splashing into the interior of the balanced gas water heater after dripping onto the main body of the collection tray, further preventing rainwater from damaging the components inside the balanced gas water heater.

[0035] like Figures 2 to 4 As shown, in one embodiment, the water collection tank 22 includes a first tank section 221, a second tank section 222, and a third tank section 223. A first transition section 224 is inclined between the first tank section 221 and the second tank section 222, a second transition section 225 is inclined between the second tank section 222 and the third tank section 223, and a third transition section 226 is inclined between the third tank section 223 and the first tank section 221. Along the height direction of the housing 100, the height of the first tank section 221 is greater than the height of the second tank section 222, and the height of the second tank section 222 is greater than the height of the third tank section 223.

[0036] In this embodiment, the water collection trough 22 is formed by combining a first trough segment 221, a second trough segment 222, and a third trough segment 223. The first trough segment 221, the second trough segment 222, and the third trough segment 223 are connected end to end to form an approximately annular water collection trough 22. A first transition section 224 is inclined between the first trough segment 221 and the second trough segment 222, a second transition section 225 is inclined between the second trough segment 222 and the third trough segment 223, and a third transition section 226 is inclined between the third trough segment 223 and the first trough segment 221. This ensures that the first trough segment 221, the second trough segment 222, and the third trough segment 223 of the water collection trough 22 are not on the same horizontal plane, which facilitates the flow of rainwater within the water collection trough 22 and ensures that all rainwater in the water collection trough 22 eventually flows onto the third trough segment 223, facilitating subsequent drainage of the rainwater from the water collection trough 22.

[0037] Furthermore, since the height of the first trough segment 221 is greater than the height of the second trough segment 222, and the height of the second trough segment 222 is greater than the height of the third trough segment 223 along the height direction of the housing 100, the distance between the first trough segment 221 and the top of the housing 100 is less than the distance between the second trough segment 222 and the top of the housing 100, and the distance between the second trough segment 222 and the top of the housing 100 is less than the distance between the third trough segment 223 and the top of the housing 100, the rainwater collection tray 2 is designed in a stepped manner to facilitate the flow of rainwater in the collection trough 22. Furthermore, since the gap between the rainwater collection tray 2 and the top of the housing 100 allows airflow, the airflow entering the housing 100 from the air outlet 104 of the first air inlet channel 102 can flow into the interior of the housing 100 through this gap. Therefore, designing the rainwater collection tray 2 as a stepped type can increase the distance between the rainwater collection tray 2 and the top of the housing 100, thereby ensuring that the gap is large enough, thus ensuring sufficient airflow in the balanced gas water heater, and further reducing the impact of the rainwater collection tray 2 on the air outlet resistance.

[0038] In one embodiment, the rainwater collection tray 2 is also provided with a rainwater drain outlet 23, which is located at the end of the third trough section 223 away from the second trough section 222, and a rainwater drain pipe 3 is connected to the rainwater drain outlet 23.

[0039] In this embodiment, the rainwater drain outlet 23 is located on the third trough section 223 and is positioned away from the second trough section 222, so that the rainwater drain outlet 23 is located at the lowest point of the water collection trough 22. This allows the rainwater drain outlet 23 to efficiently drain the collected rainwater, preventing water from overflowing or stagnating in the rainwater collection pan 2. A rainwater drain pipe 3 is connected to the rainwater drain outlet 23, allowing rainwater to drain from the outlet 23 and then enter the water collector 4 through the drain pipe 3, further discharging the rainwater to the outside of the balanced gas water heater.

[0040] In one embodiment, an air inlet 21 is provided in the middle of the main body of the collection tray, and the lower end of the inner tube 61 of the flue is located inside the air inlet 21.

[0041] In this embodiment, an air inlet 21 is provided in the middle of the main body of the collection tray. The diameter of the air inlet 21 is slightly larger than the outer diameter of the inner tube 61 of the flue pipe, so that the inner tube 61 can pass through the air inlet 21 and the lower end of the inner tube 61 is located inside the air inlet 21. At the same time, a gap is left between the outer wall of the inner tube 61 and the inner wall of the air inlet 21 to form a second air inlet channel 103. The air inlet 21 provides sufficient space for gas flow, so that airflow can enter the interior of the housing 100 from the second air inlet channel 103, thereby reducing the impact of the rainwater collection tray 2 on the air outlet resistance, and allowing external air to smoothly enter the interior of the balanced gas water heater through the second air inlet channel 103 to provide the necessary air for combustion.

[0042] In one embodiment, the balanced gas water heater further includes a condenser 1, which includes a condenser shell 11. A flue gas inlet 13 is provided on the side wall of the condenser shell 11, and a flue gas outlet 14 is provided on the top of the condenser shell 11. The flue gas outlet 14 is connected to the inner pipe 61 of the flue pipe.

[0043] In this embodiment, the condenser 1 is used to cool the high-temperature flue gas generated by combustion, recover heat from the flue gas, and improve the thermal efficiency of the balanced gas-fired water heater. A flue gas inlet 13 is provided on the side wall of the condenser shell 11, allowing the high-temperature flue gas generated by combustion in the combustion chamber to enter the interior of the condenser shell 11 through the flue gas inlet 13. Simultaneously, a heat exchanger is provided inside the condenser shell 11, consisting of multiple coiled metal pipes. As the flue gas passes through these metal pipes, heat is transferred to the water outside the pipes, thus achieving heat recovery. A flue gas outlet 14 is provided at the top of the condenser shell 11, and the flue gas outlet 14 is connected to the inner flue pipe 61, used to discharge the cooled flue gas outside the balanced gas-fired water heater. A sealing ring 7 is also provided between the flue gas outlet 14 and the inner flue pipe 61 to prevent flue gas from escaping from the connection between the flue gas outlet 14 and the inner flue pipe 61.

[0044] In one embodiment, the outer periphery of the rainwater collection tray 2 is provided with a plurality of connecting ears 26, each connecting ear 26 being provided with a through hole 261, and the rainwater collection tray 2 is installed on the condenser housing 11 by a plurality of fasteners passing through the plurality of through holes 261 one by one.

[0045] In this embodiment, the outer periphery of the rainwater collection tray 2 is provided with multiple connecting ears 26, which are extensions of the rainwater collection tray 2 and are used to fix the rainwater collection tray 2. Each connecting ear 26 is provided with a through hole 261, which can be a circular hole on the connecting ear 26 for fasteners to pass through. The fasteners can be bolts, screws, etc. The condenser housing 11 is provided with connecting holes. By passing multiple fasteners one by one through the multiple through holes 261 and extending the fasteners into the connecting holes, the rainwater collection tray 2 can be detachably installed on the condenser housing 11. This avoids the integrated design of the condenser housing 11 and the rainwater collection tray 2, thereby saving installation space for the condenser 1 and the rainwater collection tray 2 and helping to achieve miniaturization of the balanced gas water heater.

[0046] In one embodiment, the fastener includes a snap fastener 12, which includes a connecting body 121 and a limiting part 122 disposed on the connecting body 121. One end of the connecting body 121 is connected to the condenser housing 11, and the other end is connected to the limiting part 122.

[0047] In this embodiment, the fastener is a snap-fit ​​12. Multiple snap-fits 12 can be provided, each located on the top of the condenser housing 11 and corresponding to a connecting ear 26. Each snap-fit ​​12 consists of a connecting body 121 and a limiting part 122. One end of the connecting body 121 is connected to the condenser housing 11, and the other end is connected to the limiting part 122. The limiting part 122 is located on the side away from the condenser housing 11. When installing the rainwater collection tray 2 onto the condenser housing 11, the snap-fit ​​12 passes through the through hole 261, causing the limiting part 122 of the snap-fit ​​12 to abut against the upper end of the connecting ear 26, thus partially abutting the rainwater collection tray 2 against the condenser housing 11, thereby detachably installing the rainwater collection tray 2 onto the condenser housing 11.

[0048] In one embodiment, the condenser housing 11 is further provided with a condensate drain outlet 15, which is located at the bottom of the condenser housing 11 and is connected to the condensate drain pipe 5.

[0049] In this embodiment, when the high-temperature flue gas passes through the condenser 1, the water vapor in the flue gas will condense into water, and condensate may also be generated on the inner wall of the flue pipe 61 due to excessive temperature difference. This condensate will flow back into the condenser housing 11 along the inner wall of the flue pipe 61. Therefore, by providing a condensate drain outlet 15 on the condenser housing 11 and placing the condensate drain outlet 15 at the bottom of the condenser housing 11, the condensate can be discharged through the condensate drain outlet 15. It can be understood that the bottom of the condenser housing 11 is inclined at a certain angle, so that the position of the condensate drain outlet 15 is at the lowest position at the bottom of the condenser housing 11 to facilitate the discharge of condensate.

[0050] Furthermore, a condensate drain pipe 5 is connected to the condensate drain outlet 15, so that after the condensate can be discharged from the condensate drain outlet 15, it enters the water collector 4 through the condensate drain pipe 5, and then the condensate is discharged to the outside of the balanced gas water heater.

[0051] like Figure 6 As shown, in one embodiment, the balanced gas water heater further includes a water collector 4, which includes a rainwater collection port 41 and a condensate collection port 42. The rainwater collection port 41 is connected to the rainwater drain pipe 3, and the condensate collection port 42 is connected to the condensate drain pipe 5.

[0052] In this embodiment, the water collector 4 is used to collect rainwater and condensate, and then discharge the rainwater and condensate to the outside of the balanced gas water heater. The water collector 4 is provided with a rainwater collection port 41 and a condensate collection port 42, both located at the top of the water collector 4. The rainwater collection port 41 is connected to the rainwater drain pipe 3 and is used to receive rainwater discharged from the rainwater drain pipe 3. The condensate collection port 42 is connected to the condensate drain pipe 5 and is used to receive condensate discharged from the condensate drain pipe 5.

[0053] When the balanced flue gas water heater is in operation, the high-temperature flue gas generated by combustion first enters the condenser 1, where it undergoes heat exchange through the heat exchanger inside the condenser 1. The heat in the flue gas is recovered, and its temperature decreases. The cooled flue gas then enters the inner pipe 61 of the flue gas exhaust port 14, and is subsequently discharged outside the balanced flue gas water heater through the inner pipe 61. Simultaneously, the air required for combustion enters the balanced flue gas water heater through the first air inlet channel, providing air for combustion.

[0054] If it rains outside, rainwater may enter from the upper end of the outer pipe 62 of the flue and then flow down along the inner wall of the outer pipe 62. Since the lower end of the outer pipe 62 is located above the rainwater collection tray 2, and the orthographic projection of the lower end of the outer pipe 62 is within the range of the rainwater collection tray 2, rainwater will drip onto the rainwater collection tray 2 and be collected by it. The collected rainwater is discharged through the rainwater drain outlet 23 and the rainwater drain pipe 3, and finally enters the rainwater collection outlet 41 of the water collector 4.

[0055] Meanwhile, the condensate generated during the operation of condenser 1 is discharged through condensate drain outlet 15 and condensate drain pipe 5, and finally enters the condensate collection outlet 42 of water collector 4. Water collector 4 discharges the collected rainwater and condensate to the outside of the balanced gas water heater, preventing rainwater or condensate from damaging the balanced gas water heater.

[0056] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0057] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A balanced gas-fired hot water system, characterized in that, include: Shell (100), inner pipe of flue (61), outer pipe of flue (62) and rainwater collection tray (2); The housing (100) is provided with an opening (101), one end of the inner tube (61) of the flue passes through the opening (101) and extends into the housing (100), the outer tube (62) of the flue is sleeved on the outside of the inner tube (61) and installed on the housing (100), and a first air inlet channel (102) is formed between the inner wall of the outer tube (62) and the outer wall of the inner tube (61); Along the height direction of the housing (100), the rainwater collection tray (2) is installed inside the housing (100) and sleeved on the lower end of the inner tube (61) of the flue pipe. The lower end of the outer tube (62) of the flue pipe is located above the rainwater collection tray (2) and is used to collect rainwater that slides down from the inner wall of the lower end of the outer tube (62). A second air inlet channel (103) is left between the inner wall of the rainwater collection tray (2) and the outer wall of the inner tube (61) of the flue pipe. The air inlet of the second air inlet channel (103) is opposite to the air outlet (104) of the first air inlet channel (102).

2. The balanced gas-fired hot water equipment according to claim 1, characterized in that, The rainwater collection tray (2) includes a collection tray body and a first baffle (24) and a second baffle (25) extending upward from opposite sides of the collection tray body, respectively. A water collection trough (22) is formed between the first baffle (24) and the second baffle (25). Along the height direction of the housing (100), the lower end face of the flue pipe (62) is projected on the horizontal plane within the horizontal projection range of the opening of the water collection trough (22).

3. The balanced gas-fired hot water equipment according to claim 2, characterized in that, The water collection tank (22) includes a first tank section (221), a second tank section (222), and a third tank section (223). A first transition section (224) is inclined between the first tank section (221) and the second tank section (222). A second transition section (225) is inclined between the second tank section (222) and the third tank section (223). A third transition section (226) is inclined between the third tank section (223) and the first tank section (221). Along the height direction of the shell (100), the height of the first tank section (221) is greater than the height of the second tank section (222), and the height of the second tank section (222) is greater than the height of the third tank section (223).

4. The balanced gas-fired hot water equipment according to claim 3, characterized in that, The rainwater collection tray (2) is also provided with a rainwater drain outlet (23), which is located at one end of the third trough section (223) away from the second trough section (222), and a rainwater drain pipe (3) is connected to the rainwater drain outlet (23).

5. The balanced gas-fired hot water equipment according to claim 2, characterized in that, The main body of the collection tray is provided with an air inlet (21) in the middle, and the lower end of the inner tube (61) of the smoke pipe is located inside the air inlet (21).

6. The balanced gas-fired hot water equipment according to claim 4, characterized in that, It also includes a condenser (1), which includes a condenser shell (11), a smoke inlet (13) on the side wall of the condenser shell (11), and a smoke exhaust port (14) on the top of the condenser shell (11), which is connected to the inner tube (61) of the smoke pipe.

7. The balanced gas-fired hot water equipment according to claim 6, characterized in that, The rainwater collection tray (2) has multiple connecting ears (26) on its outer periphery. Each connecting ear (26) has a through hole (261). The rainwater collection tray (2) is installed on the condenser housing (11) by multiple fasteners that are inserted one-to-one through the multiple through holes (261).

8. The balanced gas-fired hot water equipment according to claim 7, characterized in that, The fastener includes a buckle (12), which includes a connecting body (121) and a limiting part (122) provided on the connecting body (121). One end of the connecting body (121) is connected to the condenser housing (11), and the other end is connected to the limiting part (122).

9. The balanced gas-fired hot water equipment according to claim 6, characterized in that, The condenser housing (11) is also provided with a condensate drain outlet (15), which is located at the bottom of the condenser housing (11) and is connected to the condensate drain pipe (5).

10. The balanced gas-fired hot water equipment according to claim 9, characterized in that, It also includes a water collector (4), which includes a rainwater collection port (41) and a condensate collection port (42). The rainwater collection port (41) is connected to the rainwater drain pipe (3), and the condensate collection port (42) is connected to the condensate drain pipe (5).

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