CN117073229A - Heat exchange device of gas combustion domestic water heater - Google Patents
Heat exchange device of gas combustion domestic water heater Download PDFInfo
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- CN117073229A CN117073229A CN202210503400.9A CN202210503400A CN117073229A CN 117073229 A CN117073229 A CN 117073229A CN 202210503400 A CN202210503400 A CN 202210503400A CN 117073229 A CN117073229 A CN 117073229A
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- Prior art keywords
- layer coil
- pipe
- gas
- coil pipe
- heat exchange
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 89
- 239000000779 smoke Substances 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 94
- 230000000149 penetrating effect Effects 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 28
- 238000009413 insulation Methods 0.000 claims description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 239000003566 sealing material Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000011094 fiberboard Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 17
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 114
- 239000002918 waste heat Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
- F24H1/165—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a heat exchange device of a gas combustion domestic water heater, which comprises a shell, a gas burner, an ignition needle and a flame detection needle, wherein the shell is provided with a gas inlet; a water pipe arrangement cavity is arranged in the shell, and a smoke exhaust hole is formed in the top wall or the bottom wall of the shell; the water pipe arrangement cavity is at least fixedly provided with an inner layer coil pipe and an outer layer coil pipe, the inner layer coil pipe is sleeved and arranged inside the outer layer coil pipe, one end pipe body of the inner layer coil pipe is connected with a hot water outlet connector, one end pipe body of the outer layer coil pipe is connected with a cold water inlet connector, and the other end pipe body of the inner layer coil pipe is connected and communicated with the other end pipe body of the outer layer coil pipe; the cold water inlet joint, the outer-layer coil pipe, the inner-layer coil pipe and the hot water outlet joint are sequentially communicated to form a single circulating waterway; when the product burns, the main heat energy is firstly absorbed and exchanged by the pipe body of the inner-layer coil pipe, the heat energy which can not be absorbed overflows and is secondarily absorbed by the pipe body of the outer-layer coil pipe, the heat is more utilized, the heat waste is reduced, the utilization of hot gas is increased, more heat can be absorbed, and the heat exchange efficiency and the heat exchange effect are improved.
Description
Technical Field
The invention relates to a household water heater device, in particular to a heat exchange device of a gas combustion household water heater.
Background
Patent grant notice by the national intellectual property office: CN206905260U discloses a sealed combustion domestic water heater with energy saving and environment protection, the sealed combustion domestic water heater comprises a housing (1), a sealed combustion heat exchanger (2) is installed in the housing (1), the sealed combustion heat exchanger (2) comprises a round shell (21), a heat exchange tube row (22) is surrounded in the round shell (21), one end of heat exchange is a water inlet joint (23), the other end is a water outlet joint (24), and the water outlet joint (24) and the water inlet joint (23) are all penetrated out of the round shell (21); the surrounding heat exchange tube row (22) is fixed on the inner wall of the round shell (21); a combustion chamber (221) is formed in the middle of the surrounding heat exchange tube row (22); a surrounding exhaust flue (222) is formed between the outer wall of the surrounding heat exchange tube row (22) and the inner wall of the circular shell (21); the outer wall of one side of the circular shell (21) is provided with a smoke exhaust pipe joint which is communicated with a surrounding smoke exhaust flue (222); the front surface of the round shell (21) is provided with a burner fixing opening (211), and a burner (212) is fixed on the burner fixing opening (211); the surrounding type heat exchange tube bank (22) of the product is only surrounded by a single layer, heat generated by combustion of the burner (212) can be absorbed once by the single layer heat exchange tube bank (22) and cannot be absorbed twice, and waste heat cannot be recycled again, so that waste heat is wasted, the temperature of externally discharged smoke is high, and energy conservation and emission reduction are not facilitated; in addition, the heat exchange tube is not long enough, and the heat exchange effect is not ideal enough.
Disclosure of Invention
In order to solve the technical problems, the invention provides the heat exchange device of the gas combustion domestic water heater, which has reasonable structure, double-layer heat exchange, increased heat exchange waterway length, increased hot gas utilization, capability of absorbing more heat and improved heat exchange efficiency and effect.
The scheme for solving the technical problems is as follows:
the heat exchange device of the gas combustion domestic water heater comprises a shell, a gas burner, an ignition needle and a flame detection needle, wherein the ignition needle and the flame detection needle are installed on the gas burner in a sealing and penetrating way; the inner side of the shell is provided with a water pipe arrangement cavity, the top wall or the bottom wall is provided with a smoke exhaust hole, the front wall body of the shell is provided with a burner mounting hole, the gas burner is fixedly and hermetically arranged on the burner mounting hole, the bottom of the shell is provided with a condensed water outlet hole, the water pipe arrangement cavity is at least fixedly provided with an inner layer coil pipe and an outer layer coil pipe, the inner layer coil pipe and the outer layer coil pipe are used for combustion heat exchange and are made of metal, one end of the inner layer coil pipe is connected with a hot water outlet joint, one end of the outer layer coil pipe is connected with a cold water inlet joint, the other end of the inner layer coil pipe is connected and communicated with the other end of the outer layer coil pipe, and the inner layer coil pipe and the outer layer coil pipe are formed by bending and encircling a plurality of rings along the pipe body; the cold water inlet joint, the outer-layer coil pipe, the inner-layer coil pipe and the hot water outlet joint are sequentially communicated to form a single circulating waterway; the hot water outlet connector and the cold water inlet connector penetrate out from the inside of the shell and seal the penetrating holes of the hot water outlet connector and the cold water inlet connector; the inner coil is provided with a combustion chamber inside, and the fire ignited by the gas burner burns in the combustion chamber; and a smoke flow channel is arranged between the outer coil pipe and the inner wall of the shell, and the combustion chamber, the smoke flow channel and the smoke exhaust hole are communicated.
The heat exchange device of the gas combustion domestic water heater has the beneficial effects that: this product mainly sets up double-deck heat exchange coil in the inside water heater, the inlayer coil pipe cover is established and is installed inside outer coil pipe, inlayer coil pipe and outer coil pipe are by the crooked a plurality of rings formation of encircleing of body following, the inside of inlayer coil pipe is the combustion chamber, belong to double-deck coil pipe heat transfer structure, increase heat exchange waterway length, when burning, main heat energy is earlier absorbed the heat transfer by the body of inlayer coil pipe earlier, can not be by absorbing heat energy overflow by the body secondary absorption waste heat of outer coil pipe again, like this, the heat is utilized more, reduce the heat extravagant, increase steam utilization, can absorb more heat, improve heat exchange efficiency and heat exchange effect, energy-conserving effect is better, flue gas emission temperature is lower, have better energy saving and emission reduction effect.
Drawings
FIG. 1 is a perspective view of a product of the present invention;
FIG. 2 is a rear view of the product of the present invention;
FIG. 3 is a perspective view of the product of the present invention;
FIG. 4 is a perspective view of the product of the invention without the gas burner;
FIG. 5 is a perspective view of the annular enclosure and the rear insulation layer of the product of the invention;
FIG. 6 is a perspective view of the inner and outer coils of the product of the present invention disposed within a water tube placement cavity;
FIGS. 7 and 8 are layout diagrams of the inner coil, the outer coil and the combustion distributor of the product of the invention;
fig. 9, 10 and 11 are perspective views of the gas burner of the present invention;
fig. 12 is a cross-sectional view of a product of the invention.
The water pipe comprises a shell 1, a water pipe arrangement cavity 11, a smoke exhaust hole 12, a burner mounting hole 13, a condensed water outlet hole 14, a front shell cover 101, an annular surrounding frame 102, a rear shell cover 103, a left pipe penetrating joint 1011, a left pipe penetrating through hole 1012, a right pipe penetrating joint 1013, a right pipe penetrating through hole 1014 and a convex ring 1015;
the gas burner 2, the ignition needle 21, the flame detection needle 22, the gas input pipe 201, the mounting cover 202, the combustion distributor 203, the front heat insulation layer 2024, the distributor through-connection hole 2025, the gas output hole 2021, the gas distribution cavity 2031, the distributor hole 2032,
An inner coil pipe 3, a combustion chamber 31, a hot water outlet joint 32, an inner hot gas outlet gap 33, an outer coil pipe 4, a cold water inlet joint 41, an outer hot gas outlet gap 42,
A flue gas flow channel 5, a rear heat insulation layer 6 and a metal shell 7.
Detailed Description
The heat exchange device of the gas combustion domestic water heater is mainly suitable for the full premix gas combustion water heater, and comprises a shell 1, a gas burner 2, an ignition needle 21 and a flame detection needle 22, wherein the ignition needle 21 and the flame detection needle 22 are installed on the gas burner 2 in a sealing and penetrating way; the housing 1 may be circular or square, the ignition needle 21 is used for igniting the fire for combustion, and the flame detection needle 22 is used for detecting whether the fire is burning; the inside of the shell 1 is provided with a water pipe arrangement cavity 11, a top wall or a bottom wall is provided with a smoke exhaust hole 12, the water pipe arrangement cavity 11 can be round or square, the smoke exhaust hole 12 is preferably arranged on the top wall, the front wall body of the shell 1 is provided with a burner mounting hole 13, the gas burner 2 is fixedly and hermetically arranged on the burner mounting hole 13, and the bottom of the shell 1 is provided with a condensed water outlet hole 14 for discharging condensed water generated by heat exchange; the main technical improvement of the product is as follows: the water pipe arrangement cavity 11 is at least fixedly provided with an inner layer coil pipe 3 and an outer layer coil pipe 4, the inner layer coil pipe 3 is sleeved and arranged inside the outer layer coil pipe 4, the inner layer coil pipe 3 and the outer layer coil pipe 4 are used for combustion heat exchange and are made of metal, one end pipe body of the inner layer coil pipe 3 is connected with a hot water outlet joint 32, and one end pipe body of the outer layer coil pipe 4 is connected with a cold water inlet joint 41; the other end pipe body of the inner layer coil pipe 3 is connected and communicated with the other end pipe body of the outer layer coil pipe 4, and the inner layer coil pipe 3 and the outer layer coil pipe 4 are formed by bending and encircling a plurality of rings along the pipe body; the cold water inlet joint, the outer-layer coil pipe, the inner-layer coil pipe and the hot water outlet joint are sequentially communicated to form a single circulating waterway; the hot water outlet connector 32 and the cold water inlet connector 41 penetrate from the inside of the casing 1 to the outside and seal the penetrating holes thereof, preferably: the hot water outlet connector 32 and the cold water inlet connector 41 penetrate from the bottom of the shell 1 to the outside and seal the penetrating holes thereof by using sealant or a sealing ring; the inner coil 3 is provided with a combustion chamber 31, and the fire ignited by the gas burner 2 is burnt in the combustion chamber 31; a flue gas flow channel 5 is arranged between the outer coil 4 and the inner wall of the shell 1, and the combustion chamber 31, the flue gas flow channel 5 and the flue gas discharge hole 12 are communicated. After the heat generated by combustion of the combustion chamber 31 exchanges heat through the inner coil 3 and the outer coil 4, the smoke enters the smoke flow channel 5 and flows to the smoke exhaust hole 12 to flow out. The above structure realizes the basic structure for the purpose of the present invention and the basic function of technical improvement.
The product adopts a double-layer coil heat exchange structure, one layer is arranged inside and outside, the length of a heat exchange waterway is increased, at least more than half of the waterway length can be increased, and generally, the waterway length of two or more than three parts of waterways can be increased;
during combustion heat exchange, cold water enters the outer-layer coil 4 from the cold water inlet joint 41, then enters the inner-layer coil 3, finally flows out from the hot water outlet joint 32, and the water flow is in unidirectional circulation; when in combustion, the temperature of the combustion chamber 31 is highest, the temperature obtained by the pipe body of the inner layer coil 3 is highest, the generated high-temperature heat energy is firstly absorbed by the pipe body of the inner layer coil 3 to exchange heat, the water temperature of the outer layer coil 4 is lower, the heat energy which is not absorbed by the inner layer coil 3 overflows, and the pipe body of the outer layer coil 4 at low temperature absorbs the waste heat for the second time, so that the water temperature of the outer layer coil 4 is preheated; because the water temperature of the outer-layer coil pipe 4 is preheated, the preheated water temperature can be quickly heated when entering the inner-layer coil pipe 3, the temperature rising process from cold to high Wen Zhujian is good, the flowing hot water is softer and more comfortable to contact the skin, the rapid temperature rising is prevented from damaging water molecules to a certain extent, and the generation of scale is reduced; the double-layer pipe arrangement can skillfully utilize the waste heat, can lengthen the waterway, has the advantages of reducing heat waste, effectively utilizing heat, absorbing more heat, improving heat exchange efficiency and heat exchange effect, along with better energy-saving effect, lower flue gas emission temperature and better energy-saving and emission-reducing effects. The outer layer can absorb more heat, and the heat utilization is better.
The inner layer coil 3 and the outer layer coil 4 can be integrally formed, or can be formed by connecting and communicating after the inner layer coil 3 and the outer layer coil 4 are respectively produced.
Further: an inner-layer hot gas output gap 33 is arranged between the surrounding pipe bodies of the inner-layer coil pipe 3; an outer hot gas output gap 42 is arranged between the surrounding pipe bodies of the outer coil pipes 4; the combustion chamber 31, the inner-layer hot gas output gap 33, the outer-layer hot gas output gap 42, the flue gas flow channel 5 and the smoke exhaust hole 12 are communicated; during combustion, the main heat energy generated by combustion is firstly absorbed by the inner circumferential wall surface of the inner coil 3, waste heat which is not absorbed flows out from the circumference of the inner hot gas output gap 33 to the outer coil 4 and is absorbed by the outer coil 4 for the second time to preheat water, and is diffused to the wall body on the back surface of the inner coil 3 to heat, then flows out from the outer hot gas output gap 42 to the flue gas channel 5 and is diffused to the wall body on the back surface (outermost wall surface) of the outer coil 4 to heat, and finally the smoke body is discharged from the smoke exhaust hole 12 to the outside.
Further: the surrounding pipe bodies of the inner-layer coil pipes 3 and the surrounding pipe bodies of the outer-layer coil pipes 4 are arranged in a staggered mode, the inner-layer hot gas output gaps 33 are opposite to the surrounding pipe bodies of the outer-layer coil pipes 4, hot gas flows are disturbed, hot gas circulation curved paths are increased, and hot gas flowing out of the inner-layer hot gas output gaps 33 directly opposite to the surrounding pipe bodies of the outer-layer coil pipes 4, so that heat exchange effect is improved.
Further: the inner layer hot gas output gap 33 is less than 5 mm, preferably 2-3 mm; the outer hot gas output gap 42 is less than 5 mm, preferably 2-3 mm; the interval of the hot gas circulation gaps is reasonably set, so that the excessive speed of the waste heat is prevented, the overflow of the waste heat is reduced, the excessive heat loss is prevented, the inner-layer coil 3 and the outer-layer coil 4 absorb more heat, and the heat exchange effect is improved; the gap is smaller (but not too smaller), the pipelines wound by the inner coil 3 and the outer coil 4 are longer, the waterway is longer, and the heat exchange effect is better.
Further: the inner diameter of the inner layer coil pipe 3 and the outer layer coil pipe 4 is 5 mm-2 cm, and the pipe diameter is suitable for a domestic water heater; the height of the inner coil 3 is consistent with or different from that of the outer coil 4 by within 4 cm, so that the inner coil 3 can absorb more main heat, and the heat exchange effect is better; the heights of the inner coil 3 and the outer coil 4 are 8 cm-25 cm, and are generally 15 cm-20 cm, and the heights are selected according to actual conditions to produce water heaters with different power heating; the diameter of the outer-layer coil pipe 4 is smaller than 35 cm, preferably 20 cm-25 cm, and the volume of the water heater is not too large, so that the water heater is suitable for a household water heater; the tubes of the inner coil 3 and the outer coil 4 are stainless steel tubes or copper tubes, and the copper tubes are selected according to actual conditions and are preferably selected.
Further: the inner coil pipe 3 and the outer coil pipe 4 are cylindrical, the round heat exchange effect is best, the spiral mechanical bent pipe is convenient to produce, and the arrangement and the installation are best; the outer layer coil 4 is formed by bending and encircling a pipe body with equal diameter along the length for five to twenty circles, generally ten to fifteen circles are suitable for a household water heater, and the equal diameter means that the diameters of the bent and encircling pipe bodies of all circles are the same; the inner layer coil 3 is formed by bending and encircling a pipe body with the same diameter along the same direction for five to twenty circles, generally ten to fifteen circles are suitable for a household water heater, the diameter of each circle of the bent and encircling pipe body is the same, and the combustion chamber 31 is arranged inside the inner layer coil 3; the inner coil 3 is inserted into the outer coil 4, and the outer wall of the inner coil 3 is close to the inner wall of the outer coil 4.
Further: the inner wall of the back of the shell 1 is fixedly connected with a rear heat insulation layer 6, so that fire is prevented from burning on the inner wall of the back of the shell 1 and heat is prevented from being absorbed by the shell 1 to be partially dissipated; the rear heat insulation layer 6 is a ceramic fiber board or an aluminum silicate heat insulation board; the rear heat insulation layer 6 is embedded into the inner bottom of the combustion chamber 31 of the inner coil 3, the embedded part is equal to or slightly smaller than the inner diameter of the inner coil 3, excessive heat generated by combustion is prevented from flowing out of the rear part of the combustion chamber, most of heat (more than 95% of heat) flows out of the inner hot gas output gap 33, the heat exchange effect is improved, and the inner coil 3 and the outer coil 4 absorb more heat; the rear insulating layer 6 preferably seals the interior bottom of the combustion chamber 31 from heat dissipation from the interior bottom of the combustion chamber 31.
Further: the ceramic fiber board or the aluminum silicate heat insulation board is wrapped by the high-temperature-resistant metal shell 7, so that condensate water can be prevented from being soaked, new chemical corrosive substances are prevented from being generated by mixing the condensate water with smoke generated after combustion, the ceramic fiber board or the aluminum silicate heat insulation board is corroded, the board body is prevented from being corroded for a long time to loosen and collapse, durability is improved, and the service life is longer.
Further: the gap between the inner coil 3 and the outer coil 4 is inserted and fixed with a hot air diversion arc plate or the outer top of the outer coil 4 is fixed with a hot air diversion arc plate, the height of the hot air diversion arc plate is consistent with that of the inner coil 3 or slightly smaller than that of the inner coil 3, and the arc length of the hot air diversion arc plate is 30-50% of the circumference of the outer coil 4, preferably 40%; because the hot air flow generated by combustion immediately goes upwards, the temperature of the upper half arc wall of the inner layer coil 3 and the outer layer coil 4 is much higher than that of the lower half arc wall, namely the temperature is higher and lower, and the overall heated heat exchange temperature of the inner layer coil 3 and the outer layer coil 4 is not uniform; after the top is shielded by adopting the hot gas flow guiding arc plate, heat flow can not directly flow towards the direction of the smoke exhaust hole 12, so that the heat flows downwards after flowing out, then turns upwards again, heat utilization is increased, more heat can be obtained on the lower half arc walls of the inner-layer coil 3 and the outer-layer coil 4, the whole heat exchange is more uniform, and the heat exchange effect is improved.
Further: the gas burner 2 comprises a gas input pipeline 201, a mounting cover 202 and a cylindrical combustion distributor 203, wherein the gas input pipeline 201 and the mounting cover 202 are integrally formed, a gas distribution cavity 2031 is arranged in the combustion distributor 203, a plurality of distribution holes 2032 are formed in the annular wall of the combustion distributor 203, a gas inlet channel is arranged in the gas input pipeline 201, a gas output hole 2021 is formed in the middle of the back surface of the mounting cover 202, the combustion distributor 203 is fixedly connected to the gas output hole 2021, and the gas inlet channel, the gas output hole 2021, the gas distribution cavity 2031 and the distribution holes 2032 are sequentially communicated; the mounting cover 202 is fixedly connected with the edge of the burner mounting hole 13 in a sealing way through a sealing ring, and the combustion distributor 203 is inserted into the combustion chamber 31; the ignition needle 21 and the flame detection needle 22 are connected to the mounting cover 202 in a penetrating way in a sealing way, and the corresponding ignition end and detection end of the ignition needle are close to the combustion distributor 203. This consists in further refining the structure of the gas burner 2; the external fuel gas enters the fuel gas diversion cavity 2031 from the fuel gas inlet channel and the fuel gas outlet hole 2021, and then is sprayed out from the fire diversion hole 2032 to be burnt in the combustion chamber 31;
further: the shell 1 comprises a front shell cover 101, an annular surrounding frame 102 and a rear shell cover 103, wherein the front shell cover 101 is made of aluminum, the annular surrounding frame 102 is made of stainless, the rear shell cover 103 is made of aluminum, the front shell cover 101 is connected with the annular surrounding frame 102 in a sealing way through a sealing ring, the annular surrounding frame 102 is connected with the rear shell cover 103 in a sealing way through the sealing ring, a burner mounting hole 13 is formed in the middle of the front shell cover 101, and a smoke exhaust hole 12 is formed in the top wall of the annular surrounding frame 102; the bottom of the left side of the front housing cover 101 is provided with a left pipe penetrating joint 1011, a left pipe penetrating through hole 1012 is arranged in the left pipe penetrating joint 1011, the hot water outlet joint 32 penetrates out from the left pipe penetrating through hole 1012 and seals a pipe hole gap by a sealing material, the sealing material is a sealing glue or a sealing ring, the purpose of the left pipe penetrating joint 1011 is to increase the contact area between the left pipe penetrating through hole 1012 and the hot water outlet joint 32, and meanwhile, the installation firmness and stability of the hot water outlet joint 32 are improved; the bottom of the right side of the front housing cover 101 is provided with a right pipe penetrating joint 1013, a right pipe penetrating through hole 1014 is formed in the right pipe penetrating joint 1013, the cold water inlet joint 41 penetrates out from the right pipe penetrating through hole 1014 and seals a pipe hole gap with a sealing material, the sealing material is a sealing glue or a sealing ring, and the purpose of the right pipe penetrating joint 1013 is to increase the contact area between the right pipe penetrating through hole 1014 and the cold water inlet joint 41, and simultaneously improve the installation firmness and stability of the cold water inlet joint 41. This is to further refine the structure of the housing 1.
Further: the front heat insulation layer 2024 is fixed in the middle of the inner wall of the mounting cover 202, the distributor through hole 2025 is arranged in the middle of the front heat insulation layer 2024, the combustion distributor 203 passes through the distributor through hole 2025, the root of the combustion distributor 203 is arranged in the distributor through hole 2025, the ignition needle 21 and the flame detection needle 22 also pass through the front heat insulation layer 2024, the front heat insulation layer 2024 is embedded into the front part of the combustion chamber of the inner-layer coil, excessive heat generated by combustion is prevented from flowing out from the front part of the combustion chamber, most of heat (more than 95 percent of heat) flows out from the inner-layer hot gas output gap 33, the heat exchange effect is improved, and the inner-layer coil 3 and the outer-layer coil 4 absorb more heat.
Further: the inner wall hole of the burner mounting hole 13 of the front cover 101 is extended and protruded with a convex ring 1015, the convex ring 1015 is extended into the mouth of the combustion chamber 31, so that the heat of the combustion chamber 31 is prevented from flowing away from the mouth of the combustion chamber 31 along the space, the front heat insulation layer 2024 is prevented from being soaked by condensed water, the condensed water is prevented from leaking into the front heat insulation layer 2024, and meanwhile, the front heat insulation layer 2024 is prevented from being damaged and kept intact; the front heat insulation layer is a ceramic fiber board or an aluminum silicate heat insulation board.
Specific structure example 1:
the heat exchange device of the gas combustion domestic water heater is a structure and a size which are relatively suitable for the domestic water heater, and comprises a shell 1, a gas burner 2, an ignition needle 21 and a flame detection needle 22, wherein the ignition needle 21 and the flame detection needle 22 are installed on the gas burner 2 in a sealing and penetrating way; the housing 1 may be circular or square, the ignition needle 21 is used for igniting the fire for combustion, and the flame detection needle 22 is used for detecting whether the fire is burning; the gas burner is characterized in that a water pipe arrangement cavity 11 is arranged in the shell 1, a smoke exhaust hole 12 is formed in the top wall, the water pipe arrangement cavity 11 can be round or square, the smoke exhaust hole 12 is preferably formed in the top wall, a burner mounting hole 13 is formed in the front wall body of the shell 1, the gas burner 2 is fixedly mounted on the burner mounting hole 13 in a sealing mode, and a condensed water outlet hole 14 is formed in the bottom of the shell 1 and used for discharging condensed water generated by heat exchange; the water pipe arrangement cavity 11 is at least fixedly provided with an inner layer coil pipe 3 and an outer layer coil pipe 4, the inner layer coil pipe 3 is sleeved and arranged inside the outer layer coil pipe 4, the inner layer coil pipe 3 and the outer layer coil pipe 4 are used for combustion heat exchange and are made of metal, one end pipe body of the inner layer coil pipe 3 is connected with a hot water outlet joint 32, and one end pipe body of the outer layer coil pipe 4 is connected with a cold water inlet joint 41; the other end pipe body of the inner layer coil pipe 3 is connected and communicated with the other end pipe body of the outer layer coil pipe 4, and the inner layer coil pipe 3 and the outer layer coil pipe 4 are formed by bending and encircling fifteen circles along the pipe body; the cold water inlet joint, the outer-layer coil pipe, the inner-layer coil pipe and the hot water outlet joint are sequentially communicated to form a single circulating waterway; the hot water outlet connector 32 and the cold water inlet connector 41 penetrate from the bottom of the shell 1 to the outside and seal the penetrating holes thereof by using sealant or a sealing ring; the inner coil 3 is provided with a combustion chamber 31, and the fire ignited by the gas burner 2 is burnt in the combustion chamber 31; a flue gas flow channel 5 is arranged between the outer coil 4 and the inner wall of the shell 1;
an inner-layer hot gas output gap 33 is arranged between the surrounding pipe bodies of the inner-layer coil pipe 3; an outer hot gas output gap 42 is arranged between the surrounding pipe bodies of the outer coil pipes 4;
the surrounding pipe bodies of the inner-layer coil pipes 3 and the surrounding pipe bodies of the outer-layer coil pipes 4 are arranged in a staggered mode, and the inner-layer hot gas output gaps 33 are opposite to the surrounding pipe bodies of the outer-layer coil pipes 4;
the inner layer hot gas output gap 33 is 2 mm; the outer hot gas output gap 42 is 2 mm;
the height of the inner coil pipe 3 is consistent with that of the outer coil pipe 4, and is 17 cm;
the inner layer coil pipe 3 and the outer layer coil pipe 4 are cylindrical;
the inner wall of the back of the shell 1 is fixedly connected with a rear heat insulation layer 6, and the rear heat insulation layer 6 is embedded into the bottom of the combustion chamber 31;
the combustion chamber 31, the inner hot gas output gap 33, the outer hot gas output gap 42, the flue gas flow channel 5 and the smoke exhaust hole 12 are communicated. After the heat generated by combustion of the combustion chamber 31 exchanges heat through the inner coil 3 and the outer coil 4, the smoke enters the smoke flow channel 5 and flows to the smoke exhaust hole 12 to flow out.
Specific structure example 2:
unlike the specific structural embodiment 1, the housing 1 includes a front housing cover 101, an annular enclosure frame 102, and a rear housing cover 103, the front housing cover 101 is made of aluminum, the annular enclosure frame 102 is made of stainless, the rear housing cover 103 is made of aluminum, the front housing cover 101, the annular enclosure frame 102, and the rear housing cover 103 are adjacently connected in a sealing manner through a sealing ring, a burner mounting hole 13 is provided in the middle of the front housing cover 101, and a smoke exhaust hole 12 is provided on the top wall of the annular enclosure frame 102; the bottom of the left side of the front housing cover 101 is provided with a left pipe penetrating joint 1011, a left pipe penetrating through hole 1012 is arranged in the left pipe penetrating joint 1011, the hot water outlet joint 32 penetrates out from the left pipe penetrating through hole 1012 and seals a pipe hole gap by a sealing material, the sealing material is a sealing glue or a sealing ring, the purpose of the left pipe penetrating joint 1011 is to increase the contact area between the left pipe penetrating through hole 1012 and the hot water outlet joint 32, and meanwhile, the installation firmness and stability of the hot water outlet joint 32 are improved; the bottom of the right side of the front housing cover 101 is provided with a right pipe penetrating joint 1013, a right pipe penetrating through hole 1014 is formed in the right pipe penetrating joint 1013, the cold water inlet joint 41 penetrates out from the right pipe penetrating through hole 1014 and seals a pipe hole gap with a sealing material, the sealing material is a sealing glue or a sealing ring, and the purpose of the right pipe penetrating joint 1013 is to increase the contact area between the right pipe penetrating through hole 1014 and the cold water inlet joint 41, and simultaneously improve the installation firmness and stability of the cold water inlet joint 41.
Claims (9)
1. The heat exchange device of the gas combustion domestic water heater comprises a shell, a gas burner, an ignition needle and a flame detection needle, wherein the ignition needle and the flame detection needle are installed on the gas burner in a sealing and penetrating way; the inside of shell is provided with water pipe arrangement chamber, roof or diapire and is provided with the smoke vent, and the front wall body of shell is provided with the combustor mounting hole, and gas burner seals fixed mounting on the combustor mounting hole, and the bottom of shell is provided with comdenstion water apopore, its characterized in that: the water pipe arrangement cavity is at least fixedly provided with an inner layer coil pipe and an outer layer coil pipe, the inner layer coil pipe is sleeved and arranged inside the outer layer coil pipe, the inner layer coil pipe and the outer layer coil pipe are used for combustion heat exchange and are made of metal, one end pipe body of the inner layer coil pipe is connected with a hot water outlet joint, one end pipe body of the outer layer coil pipe is connected with a cold water inlet joint, the other end pipe body of the inner layer coil pipe is connected and communicated with the other end pipe body of the outer layer coil pipe, and the inner layer coil pipe and the outer layer coil pipe are formed by bending and encircling a plurality of rings along the pipe body; the hot water outlet connector and the cold water inlet connector penetrate out from the inside of the shell and seal the penetrating holes of the hot water outlet connector and the cold water inlet connector; the cold water inlet joint, the outer-layer coil pipe, the inner-layer coil pipe and the hot water outlet joint are sequentially communicated to form a single circulating waterway; the inner coil is provided with a combustion chamber inside, and the fire ignited by the gas burner burns in the combustion chamber; and a smoke flow channel is arranged between the outer coil pipe and the inner wall of the shell, and the combustion chamber, the smoke flow channel and the smoke exhaust hole are communicated.
2. The heat exchange device of a gas-fired domestic water heater according to claim 1, wherein: an inner-layer hot gas output gap is arranged between the surrounding pipe bodies of the inner-layer coil pipes; an outer-layer hot gas output gap is arranged between the surrounding pipe bodies of the outer-layer coil pipes; the combustion chamber, the inner layer hot gas output gap, the outer layer hot gas output gap, the flue gas flow channel and the flue gas exhaust hole are communicated.
3. A gas-fired domestic water heater heat exchange device according to claim 2, wherein: the surrounding pipe bodies of the inner-layer coil pipe and the surrounding pipe bodies of the outer-layer coil pipe are arranged in a staggered mode, and the inner-layer hot gas output gap faces the surrounding pipe bodies of the outer-layer coil pipe.
4. A gas-fired domestic water heater heat exchange device according to claim 2, wherein: the inner layer hot gas output gap is smaller than 5 mm; the outer layer hot gas output gap is less than 5 mm.
5. A heat exchange device of a gas combustion domestic water heater according to any one of claims 1 to 4, characterized in that: the inner diameter of the inner layer coil pipe and the outer layer coil pipe is 5 mm-2 cm; the height of the inner coil is consistent with the height of the outer coil or the difference between the heights of the inner coil and the outer coil is within 4 cm; the height of the inner layer coil pipe and the outer layer coil pipe is 8 cm-25 cm; the diameter of the outer coil pipe is smaller than 35 cm; the tubes of the inner coil and the outer coil are stainless steel tubes or copper tubes.
6. A heat exchange device of a gas combustion domestic water heater according to any one of claims 1 to 4, characterized in that: the inner layer coil pipe and the outer layer coil pipe are cylindrical; the outer layer coil is formed by bending and encircling five to twenty circles of the equal diameter and the forward extension of the tube body; the inner-layer coil is formed by bending and encircling five to twenty circles of equal-diameter forward extending tubes, and a combustion chamber is arranged inside the inner-layer coil; the inner coil is inserted into the outer coil, and the outer wall of the inner coil is close to the inner wall of the outer coil.
7. A heat exchange device of a gas combustion domestic water heater according to any one of claims 1 to 4, characterized in that: the inner wall of the back of the shell is fixedly connected with a rear heat insulation layer; the rear heat insulation layer is a ceramic fiber board or an aluminum silicate heat insulation board; the rear heat insulation layer is embedded into the bottom of the combustion chamber of the inner-layer coil, and the embedded part is equal to or slightly smaller than the inner diameter of the inner-layer coil.
8. A gas-fired domestic water heater heat exchange device according to claim 2, wherein: the gap between the inner layer coil and the outer layer coil is inserted and fixed with a hot air diversion arc plate or the outer top of the outer layer coil is fixed with a hot air diversion arc plate, the height of the hot air diversion arc plate is consistent with or slightly smaller than that of the inner layer coil, and the arc length of the hot air diversion arc plate is 30-50% of the circumference of the outer periphery of the outer layer coil.
9. A heat exchange device of a gas combustion domestic water heater according to any one of claims 1 to 4, characterized in that: the gas burner comprises a gas input pipeline, a mounting cover and a cylindrical combustion distributor, wherein the gas input pipeline and the mounting cover are integrally formed, a gas distribution cavity is formed in the combustion distributor, a plurality of fire distribution holes are formed in the annular wall of the combustion distributor, a gas inlet channel is formed in the gas input pipeline, a gas output hole is formed in the middle of the back surface of the mounting cover, the combustion distributor is fixedly connected to the gas output hole, and the gas inlet channel, the gas output hole, the gas distribution cavity and the fire distribution holes are sequentially communicated; the mounting cover is fixedly connected with the edge of the burner mounting hole in a sealing way, and the combustion distributor is inserted into the combustion chamber; the ignition needle and the flame detection needle are connected to the mounting cover in a penetrating manner in a sealing manner, and the corresponding ignition end and detection end of the ignition needle and the flame detection needle are close to the combustion distributor. A heat exchange device of a gas combustion domestic water heater according to any one of claims 1 to 4, characterized in that: the shell comprises a front shell cover, an annular surrounding frame and a rear shell cover, wherein the front shell cover is in sealing connection with the annular surrounding frame, the annular surrounding frame is in sealing connection with the rear shell cover, a burner mounting hole is formed in the middle of the front shell cover, and a smoke exhaust hole is formed in the top wall of the annular surrounding frame; the left side bottom of the front shell cover is provided with a left pipe penetrating joint, the inside of the left pipe penetrating joint is provided with a left pipe penetrating through hole, and the hot water outlet joint penetrates out from the left pipe penetrating through hole and seals a pipe hole gap by a sealing material; the right side bottom of preceding cap is provided with right poling joint, and right poling joint's inside is right poling through-hole, and cold water inlet joint wears out outside and seals the tube hole gap with the sealer from right poling through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210503400.9A CN117073229A (en) | 2022-05-09 | 2022-05-09 | Heat exchange device of gas combustion domestic water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210503400.9A CN117073229A (en) | 2022-05-09 | 2022-05-09 | Heat exchange device of gas combustion domestic water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117073229A true CN117073229A (en) | 2023-11-17 |
Family
ID=88702966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210503400.9A Pending CN117073229A (en) | 2022-05-09 | 2022-05-09 | Heat exchange device of gas combustion domestic water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117073229A (en) |
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2022
- 2022-05-09 CN CN202210503400.9A patent/CN117073229A/en active Pending
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