Fully premixed combustion device

Abstract

The utility model discloses a full premix combustion device, including the casing, be equipped with burner, combustion chamber and heat exchanger from top to bottom in the casing, the burner is equipped with a plurality of groups of fire holes, the heat exchanger includes the heat exchange pipeline of a plurality of groups of fire holes one-to-one correspondence, each group of fire holes is located right above the corresponding heat exchange pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters and heating furnaces, in particular to a fully premixed combustion device. Background Art

[0002] A gas water heater generally includes a burner and a heat exchanger. Multiple rows of fire holes are provided in the burner. The heat exchanger generally adopts coiled heat exchange tubes. In the existing structure, the fire holes and the heat exchange tubes are arranged in a staggered manner, and the fire holes are not aligned with the heat exchange tubes, resulting in non-concentrated heat exchange and low heat exchange efficiency. Content of the Utility Model

[0003] An object of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a fully premixed combustion device that enables concentrated heat exchange and improves heat exchange efficiency.

[0004] The fully premixed combustion device according to an embodiment of the utility model includes a housing. A burner, a combustion chamber and a heat exchanger are provided in the housing from top to bottom. Multiple groups of fire holes are provided on the burner. The heat exchanger includes heat exchange pipes corresponding to the multiple groups of fire holes one by one. Each group of fire holes is located directly above the corresponding heat exchange pipe.

[0005] According to some embodiments of the utility model, the burner includes a fire hole panel and a water-cooled coil. Multiple rows of downwardly protruding combustion heads connected to each other are provided on the fire hole panel. Each combustion head is provided with a group of fire holes. The water-cooled coil is wound between two adjacent combustion heads.

[0006] According to some embodiments of the utility model, a cold water inlet communicating with the water inlet end of the water-cooled coil and a preheating outlet communicating with the water outlet end of the water-cooled coil are provided on the housing. A preheating inlet and a hot water outlet respectively communicating with the heat exchange pipes are provided on the heat exchanger. The preheating inlet and the preheating outlet are connected by a water pipe.

[0007] According to some embodiments of the utility model, the cold water inlet, the preheating outlet, the preheating inlet and the hot water outlet are all arranged on the same side.

[0008] According to some embodiments of the utility model, the water-cooled coil is respectively in contact with two adjacent combustion heads.

[0009] According to some embodiments of the utility model, a premixing assembly and a diffuser tube are further included. The premixing assembly is connected to the air inlet end of the diffuser tube. The air outlet end of the diffuser tube is communicated with the opening at the top of the burner. The part of the diffuser tube close to the burner is conical.

[0010] According to some embodiments of the utility model, the diffuser tube is in an inverted L shape, and the premixing assembly is located at the lower end of the diffuser tube.

[0011] According to some embodiments of the present utility model, the premixing assembly includes a premixing fan, a gas inlet and an air inlet that are respectively communicated with the premixing fan. The gas inlet is located below the premixing fan, and the air inlet is located on the side of the premixing fan.

[0012] The fully premixed combustion device according to the embodiments of the present utility model has at least the following beneficial effects: Since each group of flame holes is located directly above the corresponding heat exchange pipe, the heat is concentrated. At the same time, through the inverted structure, the burner is arranged above the heat exchanger, and under the action of gravity, the heat is more concentrated, thereby improving the heat exchange efficiency.

[0013] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0014] The following further describes the specific embodiments of the present utility model with reference to the drawings;

[0015] Figure 1 is one structural diagram of the fully premixed combustion device;

[0016] Figure 2 is the second structural diagram of the fully premixed combustion device. Specific Embodiments

[0017] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0019] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0020] Referring to Figure 1 and Figure 2 ,A fully premixed combustion device of the present utility model includes a housing. A burner 10, a combustion chamber 11, and a heat exchanger 20 are provided in the housing from top to bottom. Multiple groups of fire holes 12 are provided on the burner 10. The heat exchanger 20 includes heat exchange pipes 21 corresponding one by one to the multiple groups of fire holes 12. Each group of fire holes 12 is located directly above the corresponding heat exchange pipe 21. Since each group of fire holes 12 is located directly above the corresponding heat exchange pipe 21, the heat is concentrated. At the same time, through the inverted structure, the burner 10 is arranged above the heat exchanger 20. Under the action of gravity, the heat is more concentrated, thereby improving the heat exchange efficiency.

[0021] As Figure 2 shown, the burner 10 includes a fire hole panel and a water-cooled coil. Multiple rows of downwardly protruding combustion heads 13 connected to each other are provided on the fire hole panel. Each combustion head 13 is provided with a group of fire holes 12. The water-cooled coil is wound between two adjacent combustion heads 13. The water-cooled coil is respectively in contact with two adjacent combustion heads 13, and can effectively absorb the heat around the combustion head 13 to reduce the temperature on the surface of the combustion head 13, playing a good heat dissipation role. It can not only reduce the generation of nitrogen oxides, but also extend the service life of the combustion head 13. A cold water inlet 14 communicating with the water inlet end of the water-cooled coil and a preheating outlet 15 communicating with the water outlet end of the water-cooled coil are provided on the burner 10. A preheating inlet 22 and a hot water outlet 23 respectively communicating with the heat exchange pipes 21 are provided on the heat exchanger 20. The preheating inlet 22 and the preheating outlet 15 are connected by a water pipe. After the water-cooled coil absorbs the heat around the combustion head 13, the cold water in the coil becomes warm water to achieve preheating. The preheated warm water flows into the heat exchanger 20 for heat exchange again, improving the heat exchange efficiency.

[0022] Furthermore, the cold water inlet 14, the preheating outlet 15, the preheating inlet 22, and the hot water outlet 23 are all arranged on the same side, so that the water pipe routes are all distributed on one side, saving space and reducing the volume of the water heater.

[0023] As Figure 1 shown, it further includes a premixing component and a diffuser pipe 30. The premixing component is connected to the air inlet end of the diffuser pipe 30. The air outlet end of the diffuser pipe 30 is communicated with the opening at the top of the burner 10. The diffuser pipe 30 is thinner near the premixing component side, and the part of the diffuser pipe 30 close to the burner 10 is conical, which not only saves materials but also has a good diffusing effect.

[0024] Furthermore, the diffuser pipe 30 is in an inverted L shape, and the premixing component is located at the lower end of the diffuser pipe 30, effectively saving the distribution space and reducing the volume of the water heater.

[0025] Further, the premixing component includes a premixing fan 40, a gas inlet 41 and an air inlet 42 which are respectively communicated with the premixing fan. The gas inlet 41 is located below the premixing fan 40 for facilitating connection with an external gas pipeline, and the air inlet 42 is located on the side of the premixing fan 40 for facilitating air entry.

[0026] It is easily understood by those skilled in the art that, on the premise of no conflict, the above preferred modes can be freely combined and superimposed.

[0027] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A fully premixed combustion device, characterized in that: include: A shell, wherein a burner (10), a combustion chamber (11) and a heat exchanger (20) are arranged in the shell from top to bottom, the burner (10) is provided with a plurality of groups of fire holes (12), the heat exchanger (20) comprises heat exchange pipes corresponding to the plurality of groups of fire holes (12) one by one, and each group of fire holes (12) is located directly above the corresponding heat exchange pipe.

2. The full premixed combustion device according to claim 1, characterized in that: The burner (10) comprises a fire hole panel and a water cooling coil, wherein the fire hole panel is provided with a plurality of rows of mutually connected downwardly protruding combustion heads (13), each of the combustion heads (13) (41) is provided with a group of the fire holes (12), and the water cooling coil is coiled between two adjacent combustion heads (13).

3. The full premixed combustion device according to claim 2, characterized in that: The burner is provided with a cold water inlet (14) connected to the water inlet end of the water cooling coil and a preheating outlet (15) connected to the water outlet end of the water cooling coil. The heat exchanger (20) is provided with a preheating inlet (22) and a hot water outlet (23) respectively connected to the heat exchange pipe. The preheating inlet (22) is connected to the preheating outlet (15) through a water pipe.

4. The full premixed combustion device according to claim 3, characterized in that: The cold water inlet (14), the preheating outlet (15), the preheating inlet (22) and the hot water outlet (23) are all arranged on the same side.

5. The full premixed combustion device according to claim 2, characterized in that: The water cooling coil is respectively in contact with two adjacent combustion heads (13).

6. The full premixed combustion device according to claim 1, characterized in that: It also comprises a premixing component and a diffuser pipe (30), wherein the premixing component is connected to the air inlet end of the diffuser pipe (30), the air outlet end of the diffuser pipe (30) is connected to the opening at the top of the burner (10), and the diffuser pipe (30) is tapered near the burner (10).

7. The full premixed combustion device according to claim 6, characterized in that: The diffuser pipe (30) is in an inverted L-shape, and the premixing assembly is located at the lower end of the diffuser pipe (30).

8. The full premixed combustion device according to claim 7, characterized in that: The premixing assembly comprises a premixing fan (40) and a gas inlet (41) and an air inlet (42) respectively connected to the premixing fan, wherein the gas inlet (41) is located below the premixing fan (40), and the air inlet (42) is located on the side of the premixing fan (40).

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