Full-premixing water-cooling combustion device and gas water heater

Abstract

The utility model discloses a full-premixing water-cooling combustion device which comprises a premixing assembly, a diffuser pipe, a flow storage cavity, a flow equalizing plate, a fire hole panel and a water-cooling coil pipe, the premixing assembly is arranged at the lower end of the diffuser pipe, the upper end of the diffuser pipe is connected with the lower end of the flow storage cavity, the flow equalizing plate is arranged in the flow storage cavity, and the fire hole panel is arranged in the water-cooling coil pipe. The fire hole panel is arranged at the upper end of the flow storage cavity and located above the flow equalizing plate, a plurality of rows of combustion heads which are connected with one another are arranged on the fire hole panel, a plurality of fire holes are formed in each combustion head, and the water cooling coil pipe is wound between every two adjacent combustion heads.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a full premixed water-cooled combustion device and a gas water heater. Background Art

[0002] There are two main types of premixing for gas water heaters: partial premixing (atmospheric combustion) and full premixing. Partial premixing of gas flames cannot burn completely, resulting in low combustion efficiency and high nitrogen oxide content. Although full premixing has high combustion efficiency, the temperature at the burner head is high, and the space around the burner head is closed and difficult to dissipate heat, which further puts the burner head in a high-temperature combustion state, easily generating more nitrogen oxides, causing greater pollution hazards and reducing the service life of the product. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a fully premixed water-cooled combustion device that can effectively dissipate heat and reduce nitrogen oxide emissions.

[0004] According to the first aspect of the present invention, a fully premixed water-cooled combustion device includes a premixing component, a diffuser, a flow storage chamber, a flow equalizing plate, a fire hole panel and a water-cooling coil. The premixing component is arranged at the lower end of the diffuser, the upper end of the diffuser is connected to the lower end of the flow storage chamber, the flow equalizing plate is arranged in the flow storage chamber, the fire hole panel is arranged at the upper end of the flow storage chamber and is located above the flow equalizing plate, the fire hole panel is provided with multiple rows of interconnected burner heads, each of the burner heads is provided with multiple fire holes, and the water-cooling coil is coiled between two adjacent burner heads.

[0005] According to some embodiments of the present invention, the water-cooling coil is respectively in contact with two adjacent combustion heads.

[0006] According to some embodiments of the present invention, the cross-section of the burner head is a cone that is narrow at the top and wide at the bottom, the top of the burner head is arc-shaped, the fire holes include a plurality of first fire holes and a plurality of second fire holes, the first fire holes are arranged at the top of the burner head, and the second fire holes are evenly arranged on the side wall of the burner head, and the first fire holes and the second fire holes are respectively strip-shaped through holes.

[0007] According to some embodiments of the present invention, the fire hole includes a plurality of third fire holes, and the third fire holes are arranged at the connection between the arc-shaped top of the burner head and the side wall thereof, and the third fire holes are circular through holes.

[0008] According to some embodiments of the present invention, the fluid storage chamber is funnel-shaped.

[0009] According to some embodiments of the present invention, a plurality of opposite tube holes are respectively provided on the front wall and the rear wall of the flow storage chamber, the tube holes are used for passing the water cooling coil, and the tube holes are located between two adjacent burner heads.

[0010] According to some embodiments of the present invention, the flow balancing plate is provided with a plurality of groups of flow balancing holes corresponding one-to-one to the plurality of burner heads, and each group of the flow balancing holes is located directly below the corresponding burner head.

[0011] According to some embodiments of the present invention, the area where the flow balancing hole is located is recessed to form a pressure relief area.

[0012] According to the second aspect of the present invention, the gas water heater comprises the above-mentioned fully premixed water-cooled combustion device and the heat exchange device, the water inlet end of the water-cooling coil is connected to the cold water pipe, and the water outlet end of the water-cooling coil is connected to the water inlet of the heat exchange device.

[0013] The fully premixed water-cooled combustion device and gas water heater according to the embodiment of the present invention have at least the following beneficial effects: air and gas are mixed through the premixing assembly and then enter the flow storage chamber through the diffuser tube. After being fully mixed in the flow storage chamber, they are evenly distributed through the flow equalizer plate and then burned through the combustion head. Since the water-cooled coil is arranged between two adjacent combustion heads, it can effectively absorb the heat around the combustion head to reduce the temperature of the combustion head surface, play a good heat dissipation role, not only can reduce the generation of nitrogen oxides, but also can extend the service life of the combustion head. In addition, after the water-cooled coil absorbs the heat around the combustion head, the cold water in the coil becomes warm water to achieve preheating. The preheated warm water flows into the heat exchange device for heat exchange, thereby improving the efficiency of heat exchange.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings;

[0016] Figure 1 It is the overall structural diagram of the fully premixed water-cooled combustion device;

[0017] Figure 2 It is the explosion structure diagram of the fully premixed water-cooled combustion device;

[0018] Figure 3 It is a structural diagram of the fire hole panel;

[0019] Figure 4 It is a cross-sectional structural diagram of a fully premixed water-cooled combustion device. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] Reference Figures 1 to 4 The present invention discloses a fully premixed water-cooled combustion device, comprising a premixing assembly 10, a diffuser 20, a flow storage chamber 30, a flow equalizing plate 31, a fire hole panel 40 and a water-cooling coil 50. The premixing assembly 10 is arranged at the lower end of the diffuser 20, the upper end of the diffuser 20 is connected to the lower end of the flow storage chamber 30, the flow equalizing plate 31 is arranged in the flow storage chamber 30, the fire hole panel 40 is arranged at the upper end of the flow storage chamber 30 and is located above the flow equalizing plate 31, a plurality of rows of interconnected burner heads 41 are arranged on the fire hole panel 40, each burner head 41 is provided with a plurality of fire holes, and the water-cooling coil 50 is coiled between two adjacent burner heads 41. After being mixed by the premixing assembly 10, the air and the gas enter the flow storage chamber 30 through the diffuser 20, are fully mixed in the flow storage chamber 30, are evenly distributed through the flow equalizing plate 31, and then are burned through the combustion head 41. Since the water-cooling coil 50 is arranged between two adjacent combustion heads 41, it can effectively absorb the heat around the combustion head 41 to reduce the temperature of the surface of the combustion head 41, and play a good heat dissipation role, which can not only reduce the generation of nitrogen oxides, but also extend the service life of the combustion head 41.

[0024] like Figure 4 As shown, the water-cooling coil 50 is respectively in contact with two adjacent burner heads 41 , so that the water-cooling coil 50 quickly absorbs the heat on the surface of the burner head 41 , further improving the heat transfer efficiency and achieving a good heat dissipation effect.

[0025] like Figure 3The cross section of the burner head 41 is a cone that is narrow at the top and wide at the bottom. The top of the burner head 41 is arc-shaped. The fire holes include a plurality of first fire holes 421 and a plurality of second fire holes 422. The first fire holes 421 are arranged at the top of the burner head 41, and the second fire holes 422 are evenly arranged on the side wall of the burner head 41. The first fire holes 421 and the second fire holes 422 are respectively strip-shaped through holes, which are convenient for passing a larger flame. Since the cross section of the burner head 41 is a cone that is narrow at the top and wide at the bottom, and the top of the burner head 41 is arc-shaped, the flame does not rise vertically, but is sprayed along the inclined side wall and arc-shaped top of the burner head 41, forming an angle with the airflow to eliminate combustion resonance and prevent flame backflow. Moreover, the first fire holes 421 and the second fire holes 422 are distributed in different planes, so that the flames are coupled with each other, and the combustion is better.

[0026] Furthermore, the fire holes include a plurality of third fire holes 433, which are arranged at the connection between the arc-shaped top of the burner head 41 and its side wall. The third fire holes 433 are circular through holes, which effectively utilize the area of ​​the burner head 41, increase the number of fire holes, and improve combustion efficiency.

[0027] like Figure 1 , 2 As shown in FIG. 4 , the flow storage chamber 30 is funnel-shaped, which is convenient for uniform mixing and for the upward flow of air. A plurality of opposite tube holes 32 are respectively provided on the front wall and the rear wall of the flow storage chamber 30. The tube holes 32 are used to pass the water cooling coil 50. The tube holes 32 are located between two adjacent combustion heads 41. The water cooling coil 50 is inserted from the tube holes 32 at the end and is sequentially coiled between two adjacent combustion heads 41, which is convenient for the arrangement and fixation of the water cooling coil 50.

[0028] like Figure 2 As shown, the flow balancing plate 31 is provided with multiple groups of flow balancing holes 311 corresponding one to one with the multiple combustion heads 41. Each group of flow balancing holes 311 is located directly below the corresponding combustion head 41. The area where the flow balancing holes 311 are located is recessed to form a decompression area, and the flow balancing effect is good.

[0029] The utility model also discloses a gas water heater, comprising the above-mentioned full premixed water-cooled combustion device and heat exchange device, the water inlet end of the water-cooled coil 50 is connected to the cold water pipe, and the water outlet end of the water-cooled coil 50 is connected to the water inlet of the heat exchange device. In addition, after the water-cooled coil 50 absorbs the heat around the combustion head 41, the cold water in the coil becomes warm water, achieving preheating, and the preheated warm water flows into the heat exchange device for heat exchange, thereby improving the efficiency of heat exchange.

[0030] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0031] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A fully premixed water-cooled combustion device, characterized in that: include: A premixing assembly (10), a diffuser (20), a flow storage chamber (30), a flow balancing plate (31), a fire hole panel (40) and a water cooling coil (50), wherein the premixing assembly (10) is arranged at the lower end of the diffuser (20), the upper end of the diffuser (20) is connected to the lower end of the flow storage chamber (30), the flow balancing plate (31) is arranged in the flow storage chamber (30), the fire hole panel (40) is arranged at the upper end of the flow storage chamber (30) and is located above the flow balancing plate (31), the fire hole panel (40) is provided with a plurality of rows of mutually connected burner heads (41), each of the burner heads (41) is provided with a plurality of fire holes, and the water cooling coil (50) is coiled between two adjacent burner heads (41).

2. The fully premixed water-cooled combustion device according to claim 1, characterized in that: The water-cooling coil (50) is respectively in contact with two adjacent combustion heads (41).

3. The fully premixed water-cooled combustion device according to claim 1 is characterized in that: The cross section of the burner head (41) is in the shape of a cone which is narrow at the top and wide at the bottom; the top of the burner head (41) is in the shape of an arc; the fire holes include a plurality of first fire holes (421) and a plurality of second fire holes (422); the first fire holes (421) are arranged at the top of the burner head (41); the second fire holes (422) are evenly arranged on the side wall of the burner head (41); the first fire holes (421) and the second fire holes (422) are respectively strip-shaped through holes.

4. The fully premixed water-cooled combustion device according to claim 2 is characterized in that: The fire holes include a plurality of third fire holes (423), and the third fire holes (423) are arranged at the connection between the arc-shaped top of the burner head (41) and its side wall, and the third fire holes (423) are circular through holes.

5. The fully premixed water-cooled combustion device according to claim 1, characterized in that: The fluid storage chamber (30) is funnel-shaped.

6. The fully premixed water-cooled combustion device according to claim 4, characterized in that: A plurality of opposite tube holes (32) are respectively provided on the front wall and the rear wall of the flow storage chamber (30), the tube holes (32) are used to pass the water cooling coil (50), and the tube holes (32) are located between two adjacent burner heads (41).

7. The fully premixed water-cooled combustion device according to claim 1 is characterized in that: The flow balancing plate (31) is provided with a plurality of groups of flow balancing holes (311) corresponding one-to-one to the plurality of burner heads (41), and each group of the flow balancing holes (311) is located directly below the corresponding burner head (41).

8. The fully premixed water-cooled combustion device according to claim 7, characterized in that: The area where the flow balancing hole (311) is located is recessed to form a pressure relief area.

9. A gas water heater, characterized in that: It comprises a fully premixed water-cooled combustion device and a heat exchange device as described in any one of claims 1 to 8, wherein the water inlet end of the water-cooling coil (50) is connected to a cold water pipe, and the water outlet end of the water-cooling coil (50) is connected to a water inlet of the heat exchange device.

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