Full-premixing condensation type exchanger

Abstract

The utility model discloses a full-premixing condensation type exchanger which comprises a shell, an upper shell cover and a lower shell box are connected in a wedged mode to form the shell, a combustion chamber is arranged in the shell, and a natural gas inlet pipe and a smoke exhaust pipe are arranged on the front side and the rear side, communicated with the combustion chamber, of the shell respectively. A combustion chamber is arranged in the shell, a fireproof plate is arranged under the combustion chamber, a smoke channel is constructed between the fireproof plate and the lower shell box, the smoke channel is communicated with the smoke exhaust pipe, the coil pipe is of a double-spiral structure, the coil pipe is wound in the shell and surrounds the combustion chamber, and the smoke exhaust pipe is communicated with the smoke channel. And a water outlet and a water inlet of the coil pipe are positioned on the same side of the lower shell box and are arranged side by side. According to the full-premixing condensation type exchanger, the problems of high energy consumption and low heat exchange efficiency caused by non-uniform heating of a medium due to direct contact between open fire and a coil pipe in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field, concretely is a kind of full premix condensing exchanger. BACKGROUND

[0002] With the importance of global energy utilization efficiency and environmental protection, natural gas as a relatively clean, efficient energy, gradually widely used in the field of heating, gas wall-hanging stove uses natural gas as fuel, heat exchanger as its core component, can efficiently transfer the heat energy generated by natural gas combustion to circulating water, meet the heating needs of family or building, comply with the trend of energy structure adjustment.

[0003] The current heat exchanger can only reach 2-level energy efficiency, cannot meet the use of 1-level energy efficiency, there are relatively high energy consumption, low heat exchange efficiency and other problems, of course, for the above problems, prior art CN218033734U a kind of full premix condensing exchanger, by the burner and flue gas discharge channel around design coil pipe as main medium passage, can fully absorb heat, but single thread rod coil pipe and non same side side-by-side design, make the proportion of coil pipe in machine case low, medium in coil pipe can be contacted with flue gas, hot gas short time, so that flue gas from the temperature of exhaust gas port is high, cannot make full use of heat, and direct contact of open fire and coil pipe also can cause medium uneven heating, thereby there are high energy consumption, low heat exchange efficiency problems. SUMMARY

[0004] One object of the present utility model is to solve at least the above problems and / or defects, and to provide at least the advantages to be explained later.

[0005] In order to achieve these objects and other advantages according to the present utility model, a full premix condensing exchanger is provided, comprising: a shell connected by an upper shell cover and a lower shell box, a combustion chamber is provided in the shell, a natural gas inlet pipe and a smoke exhaust pipe are provided on the front side and the rear side of the shell communicated with the combustion chamber; a fireproof plate is provided below the combustion chamber, a flue gas passage is formed between the fireproof plate and the lower shell box, the flue gas passage is communicated with the smoke exhaust pipe, further comprising:

[0006] The coil pipe with double helix structure is coiled in the shell and arranged around the combustion chamber, and the water outlet and the water inlet of the coil pipe are located on the same side of the lower shell box and arranged side by side.

[0007] Preferably, the upper shell cover is provided with a burner in a planar shape, the burner is communicated with the natural gas inlet pipe, and the burner comprises: a vortex fan blade arranged in the upper shell cover.

[0008] A fireproof ring is arranged below the vortex vane, and a through air hole is arranged at the center of the fireproof ring;

[0009] An ignition needle is arranged below the fireproof ring, extends into the combustion chamber and is located directly below the through air hole.

[0010] Preferably, the limit ring of the special-shaped structure is further included;

[0011] The lower shell box opening is provided with a lap table, and the outer edge of the limit ring is provided with a convex ring I which is lapped with the lap table, the side of the limit ring relative to the fireproof ring is provided with a convex ring II, and the lower end of the upper shell cover is lapped with the convex ring II;

[0012] The coil pipe is located between the limit ring and the inner wall of the lower shell box.

[0013] Preferably, the coil pipe is a flat tube structure

[0014] The utility model at least includes following beneficial effects:

[0015] The remarkable feature of the device is that the water inlet and outlet are located on the same side and arranged side by side, which brings many advantages, from the perspective of space utilization, it can effectively improve the space ratio of the heat exchanger in the case, in the limited case space, the structure of the same side inlet and outlet makes the installation of the heat exchanger more compact, which is also helpful to optimize the internal structure of the whole wall-mounted stove.

[0016] The double helix coil pipe has a larger heat exchange area, compared with the ordinary single helix coil pipe structure, the flow distance of the medium is increased, in the flow process of the high-temperature flue gas generated by gas combustion, the double helix coil pipe can be more fully contacted with the flue gas, it can better absorb the flue gas temperature and efficiently transfer the heat in the flue gas to the medium in the pipe, thereby significantly improving the thermal efficiency.

[0017] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by the skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the cross-sectional structure of the utility model;

[0019] Fig. 2 It is the enlarged structure schematic view of the shell connection mode of the utility model;

[0020] Fig. 3 It is the whole structure schematic view of the utility model. DETAILED DESCRIPTION

[0021] The utility model makes further detailed description in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0022] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that in the description of the utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, or can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In addition, in the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be 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 first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] The utility model will be described in detail in combination with the drawings:

[0027] Figs. 1-3 A full premix condensing exchanger of the utility model is shown, which comprises: a shell 1 which is connected by upper shell cover 11 and lower shell box 12, a combustion chamber 2 is arranged in the shell, the front side and the rear side of the shell 1 communicated with the combustion chamber 2 are respectively provided with natural gas inlet pipe 3 and smoke exhaust pipe 4;The lower side of the combustion chamber 2 is provided with fireproof plate 5, the smoke passage 6 is formed between the fireproof plate 5 and the lower shell box 12, the smoke passage 6 is communicated with the smoke exhaust pipe 4, further comprising:

[0028] The coil 7 in double helix structure is coiled in the shell 1 and is arranged around the combustion chamber 2, and the water outlet 71 and the water inlet 72 of the coil 7 are located on the same side of the lower shell box 12 and are arranged in parallel.

[0029] Working principle:

[0030] In use, the natural gas inlet pipe 3 on the upper shell cover 11 supplies combustion gas to the combustion chamber 2 in the lower shell box 12 for natural gas ignition and combustion, at this time, the water inlet 72 of the coil 7 is connected to the medium (such as tap water) that needs to be heated, and the heat radiation of the natural gas and the flue gas will heat the medium flowing in the coil 7 in double helix structure, and the flue gas generated in the combustion is discharged from the flue gas outlet 4 through the flue gas passage 6 after heat consumption, and finally leaves the lower shell box 12 (to avoid the influence of flue gas retention on combustion efficiency), and the medium flows out from the water outlet 71 of the coil 7 and is used in heating equipment such as heating radiators or floor heating.

[0031] Among them, ① the coil 7 in spiral structure is in the form of double helix coil, which has larger heat exchange area and can better absorb the temperature of flue gas compared with the traditional single helix structure, in the process of flowing of high-temperature flue gas generated by gas combustion, the double helix coil can more fully contact with the flue gas, and the heat in the flue gas is efficiently transferred to the medium in the pipe, thereby significantly improving the heat efficiency, and the efficient heat absorption also reduces the discharge temperature of the flue gas, so that the energy is more fully utilized, the waste of heat is reduced, and the requirements of energy saving and environmental protection are met.

[0032] ② The water outlet 71 and the water inlet 72 of the coil 7 are located on the same side of the lower shell box 12 and are arranged in horizontal close parallel form, which has many advantages, from the perspective of space utilization, it can effectively improve the space ratio of the heat exchanger in the machine box, in the limited machine box space, the structure of the same side inlet and outlet makes the installation of the heat exchanger more compact, and also helps to optimize the internal structure of the whole wall-mounted stove.

[0033] In the above scheme, the burner 8 in a plane is arranged in the upper shell cover 11, the burner 8 is in communication with the natural gas inlet pipe 3, and the burner 8 comprises: a vortex fan blade 81 arranged in the upper shell cover 11.

[0034] A fireproof ring 82 is arranged below the vortex fan blade 81, and a gas inlet hole 83 is arranged at the center of the fireproof ring 82;

[0035] An ignition needle 84 is arranged below the fireproof ring 82 and extends into the combustion chamber 2 and is located directly below the gas inlet hole 83.

[0036] Working principle:

[0037] Natural gas enters into the burner 8 through the natural gas inlet pipe 3, at this time, the vortex fan blade 81 on the burner 8 is started to work, the vortex fan blade 81 can promote the surrounding air to produce vortex flow through rotation or its special shape structure, so that the air and natural gas can be more uniformly mixed before entering the combustion chamber 2, and sufficient premixing is very critical for the subsequent efficient combustion of natural gas, which can improve the combustion efficiency and reduce pollutants generated by incomplete combustion;

[0038] When the natural gas and air mixture gas is ignited by the ignition needle 84 through the air hole 83, the mixture gas is ignited to initiate a combustion reaction, and the natural gas starts to burn and release heat. At this time, the cooperation between the fireproof ring 82 and the air hole 83 can limit the position of the flame burning to a certain extent, so that the heat generated by the combustion is in the form of radiation to heat the coil 7, instead of direct contact between the flame and the coil 7;

[0039] The structure design of the vortex fan blade 81 and the fireproof ring 82 can maintain the air supply required for combustion and ensure the stability of the combustion. The continuous supply of natural gas and the reasonable supplement of air can make the combustion process continue, and generate heat continuously to meet the working requirements of the equipment;

[0040] ①A certain notch is arranged on the inner wall of the upper wall of the upper shell cover 11, so that the vortex fan blade 81 can be directly installed in the notch, and the fireproof ring 82 can prevent the flame from backfiring to a certain extent, thereby ensuring the safety of the combustion system;

[0041] ②The burner 8 adopts a flat structure. The advantage of this structure is that the heat generated by combustion is in the form of radiation to heat the coil, instead of direct contact between the flame and the coil. Direct heating of the flame may cause uneven heating of the coil, affecting the service life and heat exchange effect. The flat structure of the burner can heat the coil more evenly through heat radiation, further improving the stability and reliability of heat exchange, prolonging the service life of the heat exchanger to a certain extent, and ensuring the long-term stable operation of the gas wall-hanging stove.

[0042] In the above scheme, further comprising: a limit ring 9 with a special shape;

[0043] The lower shell box 12 is provided with a lap joint table 121, and the outer edge of the limit ring 9 with a special shape is provided with a convex ring I 91 which is lap jointed with the lap joint table 121. The side of the limit ring 9 with a special shape relative to the fireproof ring 82 is provided with a convex ring II 92, and the lower end of the upper shell cover 11 is lap jointed with the convex ring II 92.

[0044] The coil 7 is located between the limit ring 9 and the inner wall of the lower shell box 12.

[0045] Working principle:

[0046] The specific mounting mode of the upper shell cover 11 and the lower shell box 12 is that the top end of the lower shell box 12 has a protruding limiting ring, a lap joint table 121 exists between the limiting ring and the port of the lower shell box 12, and the upper shell cover has a ring groove relative to the position of the protruding limiting ring;

[0047] The protruding ring I 91 on the special-shaped limiting ring 9 is directly placed on the lap joint table 121, the protruding ring II 92 at the other end of the special-shaped limiting ring 9 is lapped with the lower port of the upper shell cover 11, and a small ring exists between the port and the protruding ring II, which is used for fixing and mounting the fireproof ring 82 between the protruding ring II 92 and the lower port of the upper shell cover 11 to realize fixation (in actual use, the protruding ring II 92, the lower port of the upper shell cover 11 and the ring can be connected by external bolts to strengthen sealing and stability), and the upper shell cover 22 and the lower shell box 12 are connected by the protruding limiting ring and the ring groove to realize butt joint and complete the installation of the shell body 1;

[0048] This connection mode enables the special-shaped limiting ring 9 to be stably installed at the opening of the lower shell box 12, thereby providing an important support and positioning basis for the coil pipe 7 and ensuring the accuracy and stability of subsequent component installation;

[0049] The upper shell cover 11, the special-shaped limiting ring 9 and the lower shell box 12 form a closed space structure, which surrounds the key components such as the burner and the coil pipe in the interior, and ensures that the combustion and heat exchange processes are carried out in a relatively stable and safe space.

[0050] As in the above scheme, the advantages of the coil pipe 7 in the flat tube structure are as follows: ① increasing the heat exchange area: the unique flat shape of the flat tube makes the contact area larger than that of the round tube, and in the same space, the flat tube can provide more heat exchange surface and more efficiently absorb or release heat, thereby improving the heat exchange efficiency and better absorbing the heat of flue gas generated by combustion to heat water in the gas wall-hanging stove;

[0051] ② optimizing the space layout: the flat tube structure is relatively flat, and can better adapt to the compact space layout during installation in the equipment;

[0052] ③ the special flow channel shape can make the fluid distribution more uniform, reduce flow resistance and local vortex phenomenon, which helps to improve the flow performance of the fluid, promote the uniformity of heat transfer, and improve the stability and reliability of heat exchange.

[0053] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation described in the specification and examples, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A fully premix condensing exchanger comprising: The shell is obtained by the upper shell cover, the lower shell box wedge connection, the shell is provided with combustion chamber, the shell and combustion chamber communication's front side, rear side is provided with natural gas intake pipe, smoke exhaust pipe respectively; The lower side of the combustion chamber is provided with fireproof plate, the fireproof plate and the lower shell box between the construction of flue gas passage, the flue gas passage and the smoke exhaust pipe communication, its characterized in that, still include: The coil is arranged in the shell and surrounds the combustion chamber, and the water outlet and the water inlet of the coil are located on the same side of the lower shell box and are arranged side by side.

2. The all-premix condensing exchanger of claim 1, wherein, The upper shell cover is provided with a burner in a planar shape, the burner is communicated with the natural gas intake pipe, the burner includes: a vortex fan blade arranged in the upper shell cover; The fireproof ring is arranged below the vortex fan blade, and a through hole is provided in the center of the fireproof ring; The ignition needle is arranged below the fireproof ring and extends into the combustion chamber and is located directly below the through hole.

3. The all-premix condensing exchanger of claim 1 or 2, wherein, Further comprising: A limiting ring with a special shape; The lower shell box opening is provided with a lap joint table, and the outer edge of the limiting ring is provided with a convex ring I which is lapped with the lap joint table, the side of the limiting ring opposite to the fireproof ring is provided with a convex ring II, and the upper shell cover lower end port is lapped with the convex ring II; The coil is located between the limiting ring and the inner wall of the lower shell box.

4. The all-premix condensing exchanger of claim 1, wherein, The coil is a flat tube structure.

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