Full-premixing condensation type wall-hanging stove

Abstract

The utility model relates to a full premixing condensation type wall-hanging stove which comprises a stove body and further comprises a premixer used for heating a heat exchanger, the premixer is provided with a ventilating duct used for being connected with a blast air inlet assembly, a fuel gas inlet assembly and a burner, the blast air inlet assembly conveys air to the ventilating duct, the fuel gas inlet assembly conveys fuel gas to the ventilating duct, and the burner is connected with the burner. And the fuel gas is mixed with air and then enters the combustor to be ignited. The gas guide mixing cavity used for mixing gas and air is formed in the ventilation channel, the arc-shaped gas guide pieces forming the turbulent flow structure are arranged in the gas guide mixing cavity, the airflow trend can be effectively changed through the turbulent flow structure, the gas and the air are fully mixed, and the combustion effect of the gas is improved.

Description

Technical Field

[0001] The utility model relates to a wall-mounted boiler, in particular to a fully premixed condensing wall-mounted boiler. Background Art

[0002] Existing wall-mounted boilers generally only heat the heat exchanger with the gas in the combustion chamber. In order to make the gas burn fully, some wall-mounted boilers adopt a premixer. For example, Chinese Patent No. ZL202020997191.4 discloses a fully premixed condensing gas wall-mounted boiler based on a variable-frequency water pump, which includes a housing. A burner and a first heat exchanger are arranged in the housing. An air flow channel and a water flow channel are provided in the first heat exchanger. The outlet end of the burner is connected to the inlet of the air flow channel of the first heat exchanger. The inlet end of the burner is respectively connected to an air inlet pipe and a gas inlet pipe through a premixer. The inlet of the water flow channel of the first heat exchanger is connected to the main water

[0003] supply pipe, and further includes a variable-frequency water pump. The variable-frequency water pump is provided with an outlet connected to the main water supply pipe and at least two inlets. The at least two inlets are respectively connected to a return pipe and a high-level expansion water tank. The variable-frequency water pump is connected with a safety valve, and the variable-frequency water pump and the safety valve are clamped by a fastening mechanism.

[0004] For the above-mentioned premixed condensing gas wall-mounted boiler, both the gas and the air are blown into the premixer by a blower for mixing. However, the space in the premixer is limited, and the mixing time of the air and the gas is short, resulting in a general mixing effect of the air and the gas. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a fully premixed condensing wall-mounted boiler, which can fully mix the gas and the air. A gas guiding mixing cavity for mixing the gas and the air is arranged in the ventilation duct. Arc-shaped gas guiding vanes forming a turbulent flow structure are arranged in the gas guiding mixing cavity. Through the turbulent flow structure, the air flow direction can be effectively changed, so that the gas and the air are fully mixed, and the combustion effect of the gas is improved.

[0006] The purpose of the utility model is realized as follows:

[0007] A fully premixed condensing wall-mounted boiler includes a furnace body, and further includes a premixer for heating a heat exchanger. The premixer is provided with a ventilation duct for connecting a blower air intake assembly, a gas intake assembly, and a burner. The blower air intake assembly conveys air to the ventilation duct, and the gas intake assembly conveys gas to the ventilation duct. After the gas and the air are mixed, they enter the burner and are ignited.

[0008] The burner is arranged in the premixer, and the air outlet of the ventilation duct forms a mixed air outlet communicating with the burner air inlet.

[0009] The blast air intake assembly includes a blower. The air outlet end of the blower is connected to a ventilation duct, and the air suction end of the blower communicates with the inner cavity of the furnace body and the gas intake assembly. Under the suction of the air suction end of the blower, the air in the furnace body and the gas output by the gas intake assembly are premixed.

[0010] The blast air intake assembly includes a blower and a volute air guiding member connected to the blower. One end of the volute air guiding member communicates with the inner cavity of the furnace body, and the other end of the volute air guiding member is connected to the output end of the gas intake assembly.

[0011] The gas intake assembly includes a gas valve connected to a gas source through a pipeline.

[0012] The premixer includes a housing and a cover body covering the opening of the housing. A wind guiding cover is extended and provided on the outer side of the cover body, and a ventilation duct is formed in the inner cavity of the wind guiding cover; a burner is fixedly arranged on the inner side of the cover body; a heat exchanger is arranged in the housing.

[0013] The heat exchanger includes a heat exchange coil spirally wound in the premixer. One end of the heat exchange coil is connected to a water source, and the other end of the heat exchange coil serves as a hot water outlet.

[0014] A plurality of arc-shaped air guiding vanes for guiding the air flow direction are arranged in the ventilation duct, and the guiding end of the arc-shaped air guiding vane faces the air outlet of the ventilation duct.

[0015] The guiding end of the arc-shaped air guiding vane faces the air outlet of the ventilation duct. The gas and air entering the ventilation duct are both attached to the arc-shaped air guiding vane and flow towards the burner air inlet under the traction of the blower, so that the gas is fully mixed with the air before combustion.

[0016] A plurality of arc-shaped air guiding vanes are arranged on both the left and right inner sides of the ventilation duct. The plurality of arc-shaped air guiding vanes divide the ventilation duct into two or more spaced guiding and mixing chambers. After the gas and air are mixed in the first guiding and mixing chamber, they then flow to the second guiding and mixing chamber, effectively mixing the gas and air in this way.

[0017] A condensation pipe is provided in the premixer corresponding to the heat exchanger;

[0018] One end of the condensation pipe extends out of the furnace body, or one end of the condensation pipe is connected to a condensation water storage box. Extending one end of the condensation pipe out of the furnace body can eliminate the setting of the condensation water storage box, saving the installation space inside the furnace body and reducing production costs.

[0019] The beneficial effects of the present utility model are as follows:

[0020] A guiding and mixing chamber for mixing gas and air is provided in the ventilation duct, and arc-shaped air guiding vanes forming a turbulence structure are arranged in the guiding and mixing chamber. Through the turbulence structure, the air flow direction can be effectively changed, enabling the gas and air to be fully mixed and improving the combustion effect of the gas. Brief Description of the Drawings

[0021] Figure 1 This is a schematic diagram of the internal structure of a wall-mounted boiler according to an embodiment of the present utility model.

[0022] Figure 2 This is a schematic diagram of the external structure of a premixer according to an embodiment of the present utility model.

[0023] Figure 3 This is a schematic diagram of the internal structure of a ventilation duct according to an embodiment of the present utility model.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of a heat exchanger according to an embodiment of the present utility model. Detailed implementation manners

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] See Figures 1-4 , a fully premixed condensing wall-mounted boiler, including a furnace body 1, and further including a premixer 3 for heating a heat exchanger 2. The premixer 3 is provided with a ventilation duct 6 for connecting a blower air intake assembly 4, a gas intake assembly 5, and a burner. The blower air intake assembly 4 conveys air to the ventilation duct 6, and the gas intake assembly 5 conveys gas to the ventilation duct 6. After the gas and air are mixed, they enter the burner and are ignited.

[0027] The burner is arranged in the premixer 3, and the air outlet of the ventilation duct 6 forms a mixed air outlet communicating with the burner air inlet.

[0028] The blower air intake assembly 4 includes a blower 7. The air outlet end of the blower 7 is connected to the ventilation duct 6, and the air intake end of the blower 7 communicates with the inner cavity of the furnace body 1 and the gas intake assembly 5. Under the suction action of the air intake end of the blower 7, the air in the furnace body 1 and the gas output by the gas intake assembly 5 are premixed.

[0029] The air intake end of the blower 7 extracts the air in the inner cavity of the furnace body 1 and the gas output by the gas intake assembly 5, so that the gas and air are premixed before gas combustion

[0030] The blower air intake assembly 4 includes a blower 7 and a volute air guiding member 8 connected to the blower 7. One end of the volute air guiding member 8 communicates with the inner cavity of the furnace body 1, and the other end of the volute air guiding member 8 is connected to the output end of the gas intake assembly 5.

[0031] The gas intake assembly 5 includes a gas valve 9 connected to a gas source through a pipeline.

[0032] The premixer 3 includes a housing 10 and a cover body 11 covering the opening of the housing 10. A wind guide hood 12 is extended and provided on the outer side of the cover body 11, and a ventilation duct 6 is formed in the inner cavity of the wind guide hood 12; the burner is fixedly arranged on the inner side of the cover body 11; the heat exchanger 2 is arranged in the housing 10.

[0033] The cover body 11 is fixedly sealed on the housing 10 by screws.

[0034] One end of the housing 10 of the premixer 3 is provided with a smoke exhaust port communicating with the smoke exhaust seat of the furnace body 1.

[0035] The heat exchanger 2 includes a heat exchange coil 13 spirally wound in the premixer 3. One end of the heat exchange coil 13 is connected to a water source, and the other end of the heat exchange coil 13 serves as a hot water outlet.

[0036] The heat exchanger 2 is provided with a cold water inlet connected to a water source, and the cold water inlet is connected to a water pump and a solenoid valve through a water pipe.

[0037] The housing 10 of the premixer 3 is provided with a water inlet seat corresponding to the cold water inlet of the heat exchange coil 13, and the housing 10 of the premixer 3 is provided with a water outlet seat corresponding to the hot water outlet of the heat exchange coil 13. One end of the heat exchange coil 13 extends out of the water inlet seat, and the other end of the heat exchange coil 13 extends out of the water outlet seat.

[0038] The heat exchange coil 13 is coiled in the housing 10. When the high-temperature flue gas fills the entire housing 10, the cold water in the heat exchange coil 13 is heated, and the excess high-temperature flue gas in the housing 10 is discharged out of the smoke exhaust seat of the furnace body 1 through the smoke exhaust port.

[0039] A plurality of arc-shaped air guide vanes 14 for guiding the air flow direction are arranged in the ventilation duct 6, and the guiding end of the arc-shaped air guide vane 14 faces the air outlet of the ventilation duct 6.

[0040] A plurality of arc-shaped air guide vanes 14 are arranged on both the left and right inner sides of the ventilation duct 6, and the plurality of arc-shaped air guide vanes 14 divide the ventilation duct 6 into two or more spaced air guide mixing cavities 15.

[0041] The premixer 3 is provided with a condensation pipe 16 corresponding to the heat exchanger 2;

[0042] One end of the condensation pipe 16 extends out of the furnace body 1, or one end of the condensation pipe 16 is connected to a condensation water storage box.

[0043] The above is the preferred embodiment of the present utility model, which shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fully premixed condensing wall-mounted boiler, comprising a boiler body (1), characterized in that: It further includes a premixer (3) for heating the heat exchanger (2). The premixer (3) is provided with a ventilation duct (6) for connecting the air inlet assembly (4), the gas inlet assembly (5), and the burner. The air inlet assembly (4) conveys air to the ventilation duct (6), and the gas inlet assembly (5) conveys gas to the ventilation duct (6). After the gas is mixed with the air, it enters the burner and is ignited.

2. The all-premixed condensing wall-mounted boiler according to claim 1, wherein: The burner is arranged inside the premixer (3), and the air outlet of the ventilation duct (6) forms a mixed air outlet communicating with the burner air inlet.

3. The all-premixed condensing wall-mounted boiler according to claim 1, wherein: The air inlet assembly (4) includes a blower (7). The air outlet end of the blower (7) is connected to the ventilation duct (6), and the air suction end of the blower (7) communicates with the inner cavity of the furnace body (1) and the gas inlet assembly (5). Under the suction action of the air suction end of the blower (7), the air in the furnace body (1) is premixed with the gas output by the gas inlet assembly (5).

4. The all-premixed condensing wall-mounted boiler according to claim 1, wherein: The air inlet assembly (4) includes a blower (7) and a volute air guiding member (8) connected to the blower (7). One end of the volute air guiding member (8) communicates with the inner cavity of the furnace body (1), and the other end of the volute air guiding member (8) is connected to the output end of the gas inlet assembly (5).

5. The all-premixed condensing wall-mounted boiler according to claim 1, wherein: The gas inlet assembly (5) includes a gas valve (9) connected to the gas source through a pipeline.

6. The all-premixed condensing wall-mounted boiler according to claim 1, wherein: The premixer (3) includes a housing (10) and a cover body (11) covering the opening of the housing (10). A wind guiding cover (12) is extended and provided on the outer side of the cover body (11), and the inner cavity of the wind guiding cover (12) forms the ventilation duct (6); the burner is fixedly arranged on the inner side of the cover body (11); the heat exchanger (2) is arranged inside the housing (10).

7. The all-premixed condensing wall-mounted boiler according to claim 1, characterized in that: The heat exchanger (2) includes a heat exchange coil (13) spirally wound inside the premixer (3). One end of the heat exchange coil (13) is connected to a water source, and the other end of the heat exchange coil (13) serves as a hot water outlet.

8. The all-premixed condensing wall-mounted boiler according to claim 1, characterized in that: A number of arc-shaped air guiding vanes (14) for guiding the air flow direction are arranged inside the ventilation duct (6), and the air guiding end of the arc-shaped air guiding vane (14) faces the air outlet of the ventilation duct (6).

9. The all-premixed condensing wall-mounted boiler according to claim 8, wherein: A number of arc-shaped air guiding vanes (14) are arranged on both the left and right inner sides of the ventilation duct (6), and the number of arc-shaped air guiding vanes (14) divides the ventilation duct (6) into two or more spaced air guiding and mixing chambers (15).

10. The all-premixed condensing wall-hung boiler according to claim 1, characterized in that: The premixer (3) is provided with a condensate pipe (16) corresponding to the heat exchanger (2); One end of the condensate pipe (16) extends outside the furnace body (1), or one end of the condensate pipe (16) is connected to a condensate water storage box.

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