Full-premixing condensation gas furnace

Abstract

The utility model relates to the technical field of heating and ventilation, and provides a full-premixing condensation gas furnace which comprises a furnace body, and a first premixing combustion heat exchanger and a second premixing combustion heat exchanger which are arranged in the furnace body in an up-and-down spaced or left-and-right spaced mode. A condensation drain pipe, a fuel gas inlet pipe, a heating water return pipe and a heating water outlet pipe are further arranged in the boiler body. Two or more premixed combustion heat exchangers are arranged, each premixed combustion heat exchanger can operate independently or simultaneously, and when a plurality of users need to use hot water simultaneously, the two premixed combustion heat exchangers operate simultaneously, so that different use scenes can be adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating technology field, concretely relates to a full premix condensing gas stove. BACKGROUND

[0002] The existing gas heating water heater, including: main heat exchanger, plate heat exchanger, secondary heat exchanger, burner, fan, first switching valve, heating water pipe, heating return water pipe, bathroom inlet pipe, bathroom outlet pipe, main heat exchanger connects heating water pipe and heating return water pipe. Realize when using bathroom function, also can carry out heating. But the efficiency is lower, when meeting multiple users need to use hot water simultaneously, and hot water water consumption is larger, hot water outlet temperature is correspondingly lower. SUMMARY

[0003] The utility model provides a full premix condensing gas stove, be equipped with two or two above premix combustion heat exchanger, and each premix combustion heat exchanger can independently operate or simultaneously operate, when meeting multiple users need to use hot water simultaneously, two premix combustion heat exchanger simultaneously operate, like this can adapt to different use scene.

[0004] A full premix condensing gas stove designed for this purpose, comprising a furnace body, the furnace body is equipped with two first premix combustion heat exchanger and second premix combustion heat exchanger arranged in an upper and lower interval or left and right interval, the furnace body is also equipped with condensing drain pipe, gas inlet pipe, heating return water pipe and heating outlet pipe;

[0005] The first premix combustion heat exchanger and second premix combustion heat exchanger are both equipped with condensing drain port connected with condensing drain pipe;

[0006] The first premix combustion heat exchanger and second premix combustion heat exchanger are both equipped with gas inlet end connected with gas inlet pipe;

[0007] The first premix combustion heat exchanger and second premix combustion heat exchanger are both equipped with cold water inlet end connected with heating return water pipe;

[0008] The first premix combustion heat exchanger and second premix combustion heat exchanger are both equipped with hot water outlet end connected with heating outlet pipe;

[0009] The furnace body is externally provided with a water tank and a radiator, cold water is heated to form hot water by entering the first premix combustion heat exchanger and the second premix combustion heat exchanger through the heating return water pipe, and the hot water flows to the water tank or the radiator along the heating outlet pipe.

[0010] The furnace body is also externally provided with a coupling tank, a spiral water pipe is arranged in the water tank, the spiral water pipe and the radiator are connected with the coupling tank respectively, and the heating return water pipe and the heating outlet pipe are connected with the coupling tank respectively.

[0011] The furnace body has a first water circuit operation mode and a second water circuit operation mode;

[0012] When the furnace body is in the first water circuit operation mode, hot water in the heating outlet pipe enters the spiral water pipe of the water tank and the liquid in the water tank through the coupling tank for heat exchange, and the water in the spiral water pipe returns to the heating return pipe through the coupling tank.

[0013] When the furnace body is in the second water circuit operation mode, hot water in the heating outlet pipe enters the radiator through the coupling tank, and the liquid in the radiator returns to the heating return pipe through the coupling tank.

[0014] The water tank is provided with a water storage cavity, the water inlet end of the water storage cavity is connected with the water inlet device, and the water outlet end of the water storage cavity is connected with the water using device.

[0015] The first premix combustion heat exchanger is provided with a first hot water outlet pipe, a first condensate pipe, a first gas pipe and a first cold water inlet pipe, the first hot water outlet pipe is connected with the heating outlet pipe, the first condensate pipe is connected with the condensate drain pipe, the first gas pipe is connected with the gas inlet pipe, and the first cold water inlet pipe is connected with the heating return pipe.

[0016] The second premix combustion heat exchanger is provided with a second hot water outlet pipe, a second condensate pipe, a second gas pipe and a second cold water inlet pipe; the second hot water outlet pipe is connected with the heating outlet pipe, the second condensate pipe is connected with the condensate drain pipe, the second gas pipe is connected with the gas inlet pipe, and the second cold water inlet pipe is connected with the heating return pipe.

[0017] The first premix combustion heat exchanger and the second premix combustion heat exchanger are both provided with a heat exchanger and a burner for releasing high-temperature flue gas to heat the heat exchanger, and the heating return pipe and the heating outlet pipe are respectively connected with the heat exchanger;

[0018] The first premix combustion heat exchanger is provided with a first fan, and the second premix combustion heat exchanger is provided with a second fan, the air suction ports of the first fan and the second fan are respectively communicated with the gas inlet pipe, the air suction ports of the first fan and the second fan are also communicated with the external air, the gas inlet end of the burner of the first premix combustion heat exchanger is communicated with the air outlet port of the first fan, and the gas inlet end of the burner of the second premix combustion heat exchanger is communicated with the air outlet port of the second fan, so as to realize that the gas and the external air are mixed into the burner.

[0019] The furnace body is provided with a mounting plate and a smoke collecting pipe, the first premix combustion heat exchanger is provided with a first smoke exhaust pipe, the second premix combustion heat exchanger is provided with a second smoke exhaust pipe, the first smoke exhaust pipe and the second smoke exhaust pipe abut on the mounting plate, the mounting plate is connected with the smoke collecting pipe, the smoke collecting pipe is provided with a smoke inlet communicated with the smoke exhaust pipe, and the mounting plate is provided with a mounting port inserted into the smoke exhaust pipe.

[0020] The mounting plate and the smoke collecting pipe are both arranged in the furnace body along the arrangement direction of the first premix combustion heat exchanger and the second premix combustion heat exchanger.

[0021] The installation plate is provided with a reinforcing column on the side corresponding to the smoke collecting pipe, the reinforcing column is connected with the smoke collecting pipe, the furnace body is provided with a smoke discharging seat, and the smoke collecting pipe is provided with a cavity communicating with the smoke discharging seat.

[0022] The first premix combustion heat exchanger is provided with a first gas valve between the first premix combustion heat exchanger and the gas inlet pipe, and the second premix combustion heat exchanger is provided with a second gas valve between the second premix combustion heat exchanger and the gas inlet pipe.

[0023] The beneficial technical effects of the utility model are as follows:

[0024] By being provided with two or more than two premix combustion heat exchangers, each premix combustion heat exchanger can be independently operated or simultaneously operated, when multiple users need to use hot water at the same time, two premix combustion heat exchangers are simultaneously operated, so that different use scenarios can be adapted.

[0025] The installation plate, the smoke collecting pipe and each premix combustion heat exchanger can be pre-assembled into a module accessory installed in the furnace body, so that the whole module accessory can be independently produced and configured according to the requirements of users. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0027] Figure 1 It is a plane structure schematic view of a full premix condensing gas furnace of an embodiment of the utility model.

[0028] Figure 2 It is a structure schematic view of a premix combustion heat exchanger and an installation plate of an embodiment of the utility model.

[0029] Figure 3 It is a three-dimensional structure schematic view of a premix combustion heat exchanger, an installation plate and a smoke collecting pipe of an embodiment of the utility model.

[0030] Figure 4 It is another plane structure schematic view of a full premix condensing gas furnace of an embodiment of the utility model.

[0031] Figure 5 It is a three-dimensional structure schematic view of a full premix condensing gas furnace of an embodiment of the utility model.

[0032] Figure 6 It is a waterway structure schematic view of a full premix condensing gas furnace of an embodiment of the utility model. DETAILED DESCRIPTION

[0033] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. In order to make the above objectives, characteristics and advantages of the present application more apparent and understandable, a lot of specific details are described in the following description so as to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] Referring to Figures 1-6 A full premix condensing gas stove comprises a stove body 1, two first premix combustion heat exchangers 2 and second premix combustion heat exchangers 6 arranged in an up-down interval or a left-right interval in the stove body 1, a condensing drain pipe 27, a gas inlet pipe 28, a heating return water pipe 29 and a heating outlet water pipe 30 arranged in the stove body 1;

[0035] The first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 are both provided with a condensing drain port connected with the condensing drain pipe 27;

[0036] The first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 are both provided with a gas inlet end connected with the gas inlet pipe 28;

[0037] The first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 are both provided with a cold water inlet end connected with the heating return water pipe 29;

[0038] The first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 are both provided with a hot water outlet end connected with the heating outlet water pipe 30;

[0039] The stove body 1 is externally provided with a water tank 31 and a radiator 32, cold water enters the first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 to be heated to form hot water along the heating outlet water pipe 30 to the water tank 31 or the radiator 32.

[0040] In the embodiment, the condensing drain pipe 27 is provided with a condensing water port 23, the gas inlet pipe 28 is provided with a gas inlet port 24, the heating return water pipe 29 is provided with a heating return water port 25, and the heating outlet water pipe 30 is provided with a heating outlet water port 26.

[0041] The stove body 1 is further externally provided with a coupling tank 33, the water tank 31 is provided with a spiral water pipe, the spiral water pipe and the radiator 32 are connected with the coupling tank 33 respectively, and the heating return water pipe 29 and the heating outlet water pipe 30 are connected with the coupling tank 33 respectively;

[0042] The stove body 1 has a first water circuit operation mode and a second water circuit operation mode;

[0043] The furnace body 1 is in the first water circuit operation mode, the hot water in the heating outlet pipe 30 enters the spiral water pipe of the water tank 31 through the coupling tank 33 and exchanges heat with the liquid in the water tank 31, and the water in the spiral water pipe returns to the heating return pipe 29 through the coupling tank 33.

[0044] The furnace body 1 is in the second water circuit operation mode, the hot water in the heating outlet pipe 30 enters the radiator 32 through the coupling tank 33, and the liquid in the radiator 32 returns to the heating return pipe 29 through the coupling tank 33.

[0045] The water tank 31 is provided with a water storage cavity, the water inlet end of the water storage cavity is connected with a water inlet device, and the water outlet end of the water storage cavity is connected with a water using device.

[0046] The first premix combustion heat exchanger 2 is provided with a first hot water outlet pipe 3, a first condensate pipe 4, a first gas pipe 5 and a first cold water inlet pipe 15, the first hot water outlet pipe 3 is connected with the heating outlet pipe 30, the first condensate pipe 4 is connected with the condensate drain pipe 27, the first gas pipe 5 is connected with the gas inlet pipe 28, and the first cold water inlet pipe 15 is connected with the heating return pipe 29.

[0047] In this embodiment, an electromagnetic valve is arranged on the connecting pipeline between the first cold water inlet pipe 15 and the heating return pipe 29, so as to control the water circuit on-off between the first cold water inlet pipe 15 and the heating return pipe 29.

[0048] The second premix combustion heat exchanger 6 is provided with a second hot water outlet pipe 7, a second condensate pipe 8, a second gas pipe 9 and a second cold water inlet pipe 12; the second hot water outlet pipe 7 is connected with the heating outlet pipe 30, the second condensate pipe 8 is connected with the condensate drain pipe 27, the second gas pipe 9 is connected with the gas inlet pipe 28, and the second cold water inlet pipe 12 is connected with the heating return pipe 29.

[0049] In this embodiment, an electromagnetic valve is arranged on the connecting pipeline between the first cold water inlet pipe 15 and the heating return pipe 29, so as to control the water circuit on-off between the first cold water inlet pipe 15 and the heating return pipe 29.

[0050] In this embodiment, an auxiliary water pump is arranged on the connecting pipeline between the heating outlet pipe 30 and the coupling tank 33, and a water inlet device is arranged on the connecting pipeline between the auxiliary water pump and the coupling tank 33.

[0051] In this embodiment, the water inlet device includes a flow meter and a faucet connected water inlet pipeline.

[0052] The first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6 are both provided with a heat exchanger and a burner for releasing high-temperature flue gas to heat the heat exchanger, and the heating return pipe 29 and the heating outlet pipe 30 are respectively connected with the heat exchanger.

[0053] The first premix combustion heat exchanger 2 is provided with a first fan 16, and the second premix combustion heat exchanger 6 is provided with a second fan 11, the suction ports of the first fan 16 and the second fan 11 are communicated with a gas inlet pipe 28, and the suction ports of the first fan 16 and the second fan 11 are also communicated with external air, the gas inlet end of the burner of the first premix combustion heat exchanger 2 is communicated with the air outlet of the first fan 16, and the gas inlet end of the burner of the second premix combustion heat exchanger 6 is communicated with the air outlet of the second fan 11, so as to realize the mixing of the gas and the external air into the burner.

[0054] In the embodiment, one end of the gas inlet pipe 28 is connected with a three-way valve, one end of the three-way valve is communicated with external air, and the other end of the three-way valve is connected with the suction port of the fan, when the fan is started and the gas inlet pipe 28 delivers gas, the gas and the external air pass through the three-way valve and the fan under the traction of the fan, enter the air guide cover connected with the air outlet of the fan, and are mixed and output to the burner.

[0055] The furnace body 1 is provided with a mounting plate 36 and a smoke collecting pipe 34, the first premix combustion heat exchanger 2 is provided with a first smoke exhaust pipe 18, the second premix combustion heat exchanger 6 is provided with a second smoke exhaust pipe 14, the first smoke exhaust pipe 18 and the second smoke exhaust pipe 14 abut on the mounting plate 36, the mounting plate 36 is connected with the smoke collecting pipe 34, the smoke collecting pipe 34 is provided with a smoke inlet communicated with the smoke exhaust pipe, and the mounting plate 36 is provided with a mounting opening inserted into the smoke exhaust pipe.

[0056] The mounting plate 36 and the smoke collecting pipe 34 are arranged in the furnace body 1 along the arrangement direction of the first premix combustion heat exchanger 2 and the second premix combustion heat exchanger 6.

[0057] The mounting plate 36 is provided with a reinforcing column 35 on the side corresponding to the smoke collecting pipe 34, the reinforcing column 35 is connected with the smoke collecting pipe 34, the furnace body 1 is provided with a smoke exhaust seat 19, and the smoke collecting pipe 34 is provided with a cavity communicated with the smoke exhaust seat 19.

[0058] The first premix combustion heat exchanger 2 and the gas inlet pipe 28 are provided with a first gas valve 21, and the second premix combustion heat exchanger 6 and the gas inlet pipe 28 are provided with a second gas valve 22.

[0059] In the embodiment, the reinforcing column 35 can increase the supporting strength of the mounting plate 36, so that the mounting plate 36 is not easily deformed, and in addition, the interval between the reinforcing column 35 and the smoke collecting pipe 34 forms a heat insulation gap.

[0060] Specifically:

[0061] The condensing furnace module furnace is connected to corresponding pipelines, wherein the condensate water outlet 23 is connected to a corresponding drain, the gas inlet 24 is connected to a natural gas inlet, the heating return water inlet 25 is connected to a return water end of the coupling tank 33, and the heating water outlet 26 is connected to a water outlet end of the coupling tank 33.

[0062] Auxiliary devices such as a water pump, an exhaust valve and an expansion tank are arranged in the water system. Figure 6

[0063] When the machine is started and hot water is needed, the water tank water pump is operated, the heating water of the system flows into the water tank coil (spiral water pipe) of the machine, heats the water in the water tank, and then flows back to the machine, forming a heating small cycle.

[0064] At the same time of the water system operation, the gas enters the gas valve through the gas inlet 24, then enters the mixing channel of the premix combustion heat exchanger through the pipeline, in the mixing channel, the gas and the air are mixed in a corresponding proportion (the air inlet amount can be set by adjusting the rotation speed of the fan), and then are sent to the burner by the fan for combustion. The high-temperature flue gas of the combustion continuously heats the liquid flowing through the heat exchanger, the flue gas is discharged outdoors through the smoke pipe, the flue, and the smoke seat; and the condensate water generated in the heat exchanger is discharged out of the machine through the condensate water outlet 23. When the water in the water tank reaches the set temperature, the machine switches to heating.

[0065] When the heating is operated, the heating water pump is operated, the heating water flows to the heating radiators, does not pass through the heating coil of the water tank, and at the same time, the combustion system is combusted to continuously heat the heating water, and stops when the heating water reaches the set temperature.

[0066] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0067] In the above description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0068] ​In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or identifying the number of the indicated technical features. Thus, a feature limited to "first" or "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0069] In the above description of the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixed connection by screw, rivet or welding, or it can be detachable connection, or it can be integrated by metal processing (die casting, deep drawing stamping, lathe machining, etc.), or it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the above description of the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0071] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

Claims

1. A fully premixed condensing gas stove comprising a stove body (1), characterized in that: The furnace body (1) is internally provided with two first premix combustion heat exchangers (2) and second premix combustion heat exchangers (6) arranged in an up-down interval or a left-right interval, and is further provided with a condensate drainage pipe (27), a gas inlet pipe (28), a heating return water pipe (29), and a heating outlet water pipe (30); The first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) are both provided with a condensate drainage port connected with the condensate drainage pipe (27); The first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) are both provided with a gas inlet end connected with the gas inlet pipe (28); The first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) are both provided with a cold water inlet end connected with the heating return water pipe (29); The first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) are both provided with a hot water outlet end connected with the heating outlet water pipe (30); The furnace body (1) is externally provided with a water tank (31) and a radiator (32), and cold water enters the first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) through the heating return water pipe (29) to be heated to form hot water, which flows to the water tank (31) or the radiator (32) along the heating outlet water pipe (30).

2. The fully premixed condensing gas furnace according to claim 1, characterized in that: The furnace body (1) is further externally provided with a coupling tank (33), the water tank (31) is internally provided with a spiral water pipe, the spiral water pipe and the radiator (32) are respectively connected with the coupling tank (33), and the heating return water pipe (29) and the heating outlet water pipe (30) are respectively connected with the coupling tank (33); The furnace body (1) has a first water circuit operation mode and a second water circuit operation mode; When the furnace body (1) is in the first water circuit operation mode, the hot water of the heating outlet water pipe (30) enters the water tank (31) through the coupling tank (33) to exchange heat with the liquid in the water tank (31) and the spiral water pipe, and the water in the spiral water pipe returns to the heating return water pipe (29) through the coupling tank (33); When the furnace body (1) is in the second water circuit operation mode, the hot water of the heating outlet water pipe (30) enters the radiator (32) through the coupling tank (33), and the liquid in the radiator (32) returns to the heating return water pipe (29) through the coupling tank (33).

3. The fully premix condensing gas furnace according to claim 1, wherein: The water tank (31) is internally provided with a water storage cavity, the water inlet end of the water storage cavity is connected with a water inlet device, and the water outlet end of the water storage cavity is connected with a water using device.

4. The fully premix condensing gas furnace according to claim 1, wherein: The first premix combustion heat exchanger (2) is provided with a first hot water outlet pipe (3), a first condensate pipe (4), a first gas pipe (5), and a first cold water inlet pipe (15), the first hot water outlet pipe (3) is connected with the heating outlet water pipe (30), the first condensate pipe (4) is connected with the condensate drainage pipe (27), the first gas pipe (5) is connected with the gas inlet pipe (28), and the first cold water inlet pipe (15) is connected with the heating return water pipe (29).

5. The fully premix condensing gas furnace according to claim 1, wherein: The second premix combustion heat exchanger (6) is provided with a second hot water outlet pipe (7), a second condensate pipe (8), a second gas pipe (9) and a second cold water inlet pipe (12); the second hot water outlet pipe (7) is connected with the heating outlet pipe (30), the second condensate pipe (8) is connected with the condensate drainage pipe (27), the second gas pipe (9) is connected with the gas inlet pipe (28), and the second cold water inlet pipe (12) is connected with the heating return pipe (29).

6. The fully premix condensing gas furnace according to claim 1, wherein: The first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6) are both provided with heat exchangers and burners for releasing high-temperature flue gas to heat the heat exchangers; the heating return pipe (29) and the heating outlet pipe (30) are connected with the heat exchangers, respectively. The first premix combustion heat exchanger (2) is provided with a first fan (16), and the second premix combustion heat exchanger (6) is provided with a second fan (11); the suction ports of the first fan (16) and the second fan (11) are connected with the gas inlet pipe (28), respectively; the suction ports of the first fan (16) and the second fan (11) are also connected with the external air; the gas inlet end of the burner of the first premix combustion heat exchanger (2) is connected with the air outlet of the first fan (16); the gas inlet end of the burner of the second premix combustion heat exchanger (6) is connected with the air outlet of the second fan (11), so that the gas and the external air are mixed and enter the burners.

7. The fully premix condensing gas furnace according to claim 1, wherein: The furnace body (1) is provided with a mounting plate (36) and a smoke collecting pipe (34); the first premix combustion heat exchanger (2) is provided with a first smoke exhaust pipe (18), and the second premix combustion heat exchanger (6) is provided with a second smoke exhaust pipe (14); the first smoke exhaust pipe (18) and the second smoke exhaust pipe (14) abut on the mounting plate (36); the mounting plate (36) is connected with the smoke collecting pipe (34); the smoke collecting pipe (34) is provided with a smoke inlet connected with the smoke exhaust pipe; and the mounting plate (36) is provided with a mounting opening inserted into the smoke exhaust pipe.

8. The fully premix condensing gas furnace according to claim 7, wherein: The mounting plate (36) and the smoke collecting pipe (34) are arranged in the furnace body (1) along the arrangement direction of the first premix combustion heat exchanger (2) and the second premix combustion heat exchanger (6).

9. The fully premix condensing gas furnace according to claim 7, wherein: The mounting plate (36) is provided with a reinforcing column (35) on the side corresponding to the smoke collecting pipe (34); the reinforcing column (35) is connected with the smoke collecting pipe (34); the furnace body (1) is provided with a smoke exhaust seat (19); and the smoke collecting pipe (34) is provided with a cavity connected with the smoke exhaust seat (19).

10. The fully premix condensing gas furnace according to claim 1, wherein: The first premix combustion heat exchanger (2) and the gas inlet pipe (28) are provided with a first gas valve (21); and the second premix combustion heat exchanger (6) and the gas inlet pipe (28) are provided with a second gas valve (22).

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