CN211233375U - High-efficient condensation gas hot water stove structure and system of mixing heat exchange - Google Patents

Abstract

The utility model discloses a high-efficiency condensation gas water heater structure and a system with mixed heat exchange, wherein the water heater structure comprises a burner, a heat exchanger, an isobaric smoke hood and a chimney which separates a spraying system with direct contact heat exchange from the heat exchanger; the reasonable thermal design ensures that the high-temperature flue gas is cooled after heat exchange by the heat exchanger and no condensed water is generated, and the heat exchanger does not need to consider condensed water corrosion, so that the material grade and the process cost of the dividing wall heat exchanger can be reduced; the spray system directly contacting with the heat exchange atomizes and sprays out circulating spray liquid to fully absorb the latent heat of low-temperature flue gas, and the circulating spray liquid can adopt safe and nontoxic organic working media or water working media with good heat conductivity, low viscosity and hydrophobicity; high-efficient condensation gas hot-water boiler and heat pump are connected and are formed efficiency-increasing economizer system, thereby reduce circulation spray liquid temperature and further promote low temperature flue gas condensation heat transfer efficiency and improve hot-water boiler and the whole operating efficiency of system, this utility model effectively improves whole system operating efficiency to further reduce flue gas carbon discharge capacity through spraying system.

Description

High-efficient condensation gas hot water stove structure and system of mixing heat exchange

Technical Field

The utility model belongs to improve energy utilization efficiency, energy-concerving and environment-protective heat exchange heat exchanger field, concretely relates to high-efficient condensation gas hot water stove structure and system of hybrid heat exchange.

Background

The low-nitrogen high-efficiency condensing gas water heater is an upgrading water heater with technical advancement and market popularization potential for the new generation which is developed and shaped through years of technical research and development for meeting increasingly strict energy-saving and environment-friendly emission requirements worldwide. The existing low-nitrogen high-efficiency condensation gas water heater organically combines an ultra-high-efficiency compact heat exchanger and an ultra-low-nitrogen high-efficiency fully-premixed burner, integrates multiple key technologies in the field of thermal energy engineering, such as low-nitrogen gas emission, radiation heat exchange, turbulence and condensation enhanced heat transfer, water circulation, new materials, new processes, climate compensation dynamic control and the like, and jointly realizes dual technical targets of ultra-low emission and ultra-high-efficiency waste heat recovery. The technical aim can greatly improve the utilization efficiency of clean heat supply of natural gas, and the low-nitrogen high-efficiency condensation gas water heater becomes a rigid choice for replacing the traditional steel and cast iron gas boilers. The low-nitrogen high-efficiency condensation gas water heater can be divided into a household condensation gas water heater and a commercial condensation gas water heater according to the heat supply power, the capacity of the household condensation gas water heater is less than 100kW, and the household condensation gas water heater canThe energy-saving gas water heater is divided into a household condensation gas wall-mounted water heater (less than or equal to 50kW) and a condensation gas floor water heater (less than 100kW), while the capacity of a commercial gas water heater is more than or equal to 100kW to 2800kW, but the integration number of modules can reach 28MW (equivalent to the traditional 40t/h boiler heating capacity, and can supply 40 ten thousand m of heat²Building heating) still has technical economy. The wall-mounted condensing gas boiler and the floor-mounted condensing gas boiler are mainly applied to families for simultaneously supplying domestic hot water and heating hot water, while the floor-mounted condensing gas boiler is mainly applied to schools, hospitals, commercial residences and residential quarters for simultaneously supplying domestic hot water and heating hot water or for supplying heating water singly. The domestic condensation gas water heater and the commercial condensation gas water heater have some differences in structure, but the general technical principle and the core are the same.

Although the high-power low-nitrogen high-efficiency condensation gas water heater is used for effectively saving energy, the manufacturing cost is high, and the main reason is that the heat exchanger body of the water heater corresponding to the high power has large volume and weight. The heat exchange capacity is strong in the area with higher flue gas temperature due to large end difference; in the area with lower flue gas temperature, the end difference is small, the heat flux density is small, the heat exchange capacity of the heat exchanger is weak, and the required heat exchange area and the required volume are large. The low-efficiency heat exchange area with low flue gas temperature is a key factor influencing the quality and the control cost of the heat exchanger of the water heating furnace. For small-end-difference heat exchange, the thermal resistance of the direct contact heat exchange mode adopting the spraying mode is obviously smaller than that of the indirect heat exchange mode adopting the heat exchanger, and the cost of the heat exchanger can be effectively reduced by adopting the direct contact heat exchange mode.

Disclosure of Invention

In order to effectively reduce the cost of the high-efficient condensation gas hot-water boiler of low-nitrogen and further improve the heat exchange efficiency of the high-efficient condensation gas hot-water boiler of low-nitrogen, the utility model provides a mix high-efficient condensation gas hot-water boiler structure and system of heat exchange.

The utility model discloses a following technical scheme realizes:

a high-efficiency condensation gas water heater with mixed heat exchange comprises a combustor 1 for generating high-temperature flue gas through combustion, a heat exchanger 2 for absorbing heat of the high-temperature flue gas, an isobaric smoke hood 3 for isolating a spray system 4 from the heat exchanger 2 and forming a flue gas isobaric channel on the outer wall of the heat exchanger 2, a shell 5 for coating the combustor 1, the heat exchanger 2, the isobaric smoke hood 3 and the spray system 4, and a chimney 6 arranged on the shell 5; the low-temperature flue gas after heat release by the heat exchanger 2 is further absorbed by a spraying system 4 through a channel between the shell 5 and the isobaric smoke hood 3 to absorb sensible heat and latent heat and is finally discharged from a chimney 6;

the section of the burner 1 is circular, oval or elliptical, and is arranged on the central line of the whole water heater or offset from the central line of the whole water heater to optimize the flow of smoke and reduce the flow resistance;

the heat exchanger 2 comprises a heat exchanger main body 21, a heat exchanger water inlet 22 and a heat exchanger water outlet 23 which are communicated with the heat exchanger main body 21;

the isobaric smoke hood 3 comprises a cover plate 31 and a low-temperature smoke outlet 32;

the spraying system 4 comprises a spraying liquid inlet 41 positioned at the top end of the shell 5 or on the peripheral side of the shell 5, when the spraying liquid inlet 41 is positioned at the top end of the shell 5, the spraying liquid inlet comprises a flow equalizing pipe 42 connecting the spraying liquid inlet 41 and a circular pipe 43, the circular pipe 43 is positioned between the flow equalizing pipe 42 and the cover plate 31 in the vertical direction, the circular pipe 43 and the flow equalizing pipe 42 form an included angle of 90-120 degrees, when the spraying liquid inlet 41 is positioned on the peripheral side of the shell 5, a high-pressure flow equalizing spraying mode is adopted to eliminate the structure of the flow equalizing pipe 42, the manufacturing process is simplified, the structural strength is ensured, and the circular pipe 43; also comprises an atomizing nozzle 44 positioned at the bottom end of the ring pipe 43, a condensed water outlet 45 and a spraying liquid outlet 46 positioned at the bottom end of the shell 5;

the top of the shell 5 is provided with a chimney connecting channel 51, and the bottom is provided with a presentation disc 52.

The wall temperature of the heat exchanger main body 21 is controlled to be higher than 60 ℃ under any working condition, the exhaust gas temperature is controlled to be in the range of 110-260 ℃, so that no condensate water is generated on the wall surface of the heat exchanger, and the heat exchanger main body 21 is made of cast aluminum, cast iron, carbon steel, welded stainless steel, copper or copper fin tubes.

The heat exchanger water inlet 22 and the heat exchanger water outlet 23 are both arranged at the bottom of the heat exchanger main body 21 or respectively arranged at the bottom or the top according to different types of the heat exchanger main body 21.

The isobaric smoke hood 3 is manufactured independently or integrally formed with the shell 5, the isobaric smoke hood 3 is at a preset angle with the vertical direction when a low-temperature smoke outlet 32 at the bottom is adopted, or the isobaric smoke hood 3 is vertically arranged when the surface has an even ridge type exhaust port, the isobaric flow of smoke under rated load can pass through a smoke isobaric channel between the isobaric smoke hood 3 and the heat exchanger main body 21, the uniform heat exchange of high-temperature smoke in the heat exchanger main body 21 is ensured, a cover plate 31 of the isobaric smoke hood 3 is designed to be top, bottom or double arrangement of top and bottom according to the arrangement mode of a heat exchanger water inlet 22 and a heat exchanger water outlet 23 so as to ensure that the heat exchanger 2 can be placed in the isobaric smoke hood 3, the low-temperature smoke outlet 32 at the bottom of the isobaric smoke hood 3 is uniformly provided with 4-24 annular holes, spokes are arranged between every two parts, the structural strength, when the isobaric smoke hood 3 and the shell 5 are integrally formed, the top cover plate 31 has a structure of a low-temperature smoke outlet 32.

When the spray liquid inlet 41 is positioned at the top end of the shell 5, 3-9 flow equalizing pipes 42 are connected between the spray liquid inlet 41 and the circular pipe 43, so that spray liquid uniformly flows into the circular pipe 43 from the spray liquid inlet 41, the cross section of the circular pipe 43 is trapezoidal, oval, elliptical or circular, 6-18 atomizing nozzles 44 are arranged on the circumferential direction of the circular pipe 43, 1-4 atomizing nozzles 44 are arranged on the radial direction, the cross section of each atomizing nozzle 44 is oval, square, circular or elliptical, and the angle theta formed between the cross section of each atomizing nozzle 44 and the vertical direction is 0-90 degrees, the circular pipe 43 adopts a single circular pipe or a plurality of circular pipes to form a single-stage or multi-stage spray system 4, and the spray system 4 adopts a spray mode of top-set or top-set and top-set combination to realize.

The condensed water outlet 45 is of a U-shaped structure, so that the exposure disc 52 can accumulate a certain liquid level, condensed water generated in the continuous operation of the water heater is discharged from the condensed water outlet 45, the spraying liquid outlet 46 is used for discharging circulating spraying liquid, is also positioned at the bottom end of the shell 5 but is higher than the condensed water outlet 45, and the circulating spraying liquid adopts a safe, non-toxic, organic working medium or a water working medium which has good thermal conductivity, low viscosity and is hydrophobic.

The shell 5 is made of stainless steel, cast aluminum silicon or plastic materials resistant to condensate water corrosion, the exposure disc 52 has a certain height to contain circulating spray liquid and condensate water, and meanwhile, the circulating spray liquid is separated from the condensate water by using a safe, nontoxic, organic working medium with good thermal conductivity, low viscosity and hydrophobicity, so that the condensate water and the circulating spray liquid are respectively discharged from the bottom condensate water outlet 45 and the spray liquid outlet 46.

Adopt a synergistic economizer system of mixed heat exchange's high-efficient condensation gas water heater, including heat pump system 7, plate heat exchanger 8, valves 9 and a mixed heat exchange's high-efficient condensation gas water heater structure, condenser 72 in heat exchanger 2 and the heat pump system 7 constitutes main part heat transfer subsystem, and main part heat transfer subsystem's connected mode is: the heat exchanger water outlet 23, the plate heat exchanger 8 inlet, the plate heat exchanger 8 outlet-condenser 72 inlet, the condenser 72 outlet, and the heat exchanger water inlet 22 are connected in sequence, the spraying system 4 and the evaporator 71 in the heat pump system 7 form a secondary spraying heat exchange subsystem, and the connection mode of the secondary spraying heat exchange subsystem is as follows: the spraying liquid outlet 46, the evaporator 71 inlet, the evaporator 71 outlet and the spraying liquid inlet 41 are connected in sequence; the inlet and outlet pipelines of the evaporator 71 and the condenser 72 in the heat pump system 7 are respectively provided with a valve 91 to form a valve group 9, the inlet and outlet short-circuit pipelines of the condenser 72 are provided with a short-circuit valve 92, when the heat pump system 7 is started, the short-circuit valve 92 is closed, all the valves 91 in the valve group 9 are opened, and when the heat pump system is closed, all the valves 91 in the valve group 9 are closed.

The temperature of the circulating spray liquid is reduced to further enhance the condensation heat transfer efficiency of the low-temperature flue gas, the return water temperature of the water inlet 22 of the heat exchanger is increased, the water heater and the heat pump are in synergistic coupling, the operation efficiency of the whole system is effectively improved, and the sensitivity of load return water temperature fluctuation to the operation efficiency is reduced.

All parts in the indirect and direct contact heat exchange integrated efficient gas hot water furnace are flexibly configured, and the whole body can be arranged in a surrounding mode, a left-right mode and an up-down mode.

Compared with the prior art, the utility model has the advantages of as follows:

1. the utility model discloses the water heater adopts indirect and the compound heat transfer form of direct contact, and the heat exchanger main part controls the wall temperature and is higher than 60 ℃ under any operating mode, and the temperature control of preferably discharging fume makes the heat exchanger wall not produce the comdenstion water at 180 ~ 300 ℃ scope, can not appear comdenstion water corrosion scheduling problem, can adopt cast aluminium, cast iron, carbon steel, welding stainless steel, copper fin tubular product matter and the heat exchanger of arbitrary technology and structure, reduces the heat exchanger and uses the threshold.

2. The utility model discloses the hot-water furnace adopts indirect and the compound heat transfer form of direct contact, replaces the region that flue gas temperature is lower, the end difference is little, heat flux density is little and heat transfer capacity is weak among the heat exchanger with spraying the direct contact heat transfer mode to remove a large amount of heat exchanger low efficiency district, effectively reduce heat exchanger raw and other materials quantity and technology cost.

3. The utility model discloses the hot-water boiler adopts to spray the direct contact heat transfer mode and strengthens the condensation heat transfer and effectively reduce the hot-water boiler volume and make the furnace body compacter in the low temperature flue gas heat transfer that the end difference is little.

4. The utility model discloses the system adopts the design of coupling heat pump, reduces the condensation heat transfer efficiency that the low temperature flue gas is further reinforceed to circulation spray liquid temperature, improves heat exchanger water inlet return water temperature, makes boiler and the synergistic coupling of heat pump, effectively improves whole system operating efficiency to reduce the sensitivity of load return water temperature fluctuation to operating efficiency.

Drawings

Fig. 1 is the overall schematic diagram of the efficient condensing gas water heater and the heat pump coupled to form the synergistic energy-saving system.

Fig. 2 is a three-dimensional view of an indirect and direct contact heat exchange integrated efficient condensation gas water heater, wherein fig. 2(a) is a front view, and fig. 2(b) is a half-section view.

Fig. 3 is a three-dimensional view of the indirect and direct contact heat exchange integrated high-efficiency condensation gas water heater integrally injection-molded by the isobaric smoke hood 3 and the shell 5, wherein fig. 3(a) is a front view, and fig. 3(b) is a half-sectional view.

Fig. 4 is a three-dimensional view of an integrated high-efficiency condensing gas water heater using a single-side or double-side liquid inlet method, in which a spray liquid inlet 41 is disposed outside a housing 5, fig. 4(a) is a front view, fig. 4(b) is a half-sectional view, and fig. 4(c) is a top-sectional view.

Fig. 5 is a three-dimensional view of an integrated high-efficiency condensing gas water heater using a ridge type exhaust port isobaric cover 3, wherein fig. 5(a) is a front view, fig. 5(b) is a half-sectional view, fig. 5(c) is a cross-sectional top view, and fig. 5(d) is a ridge type exhaust port schematic diagram.

Fig. 6 is a three-dimensional view of an integrated high-efficiency condensing gas water heater using a multi-stage spray form, in which fig. 6(a) is a front view, fig. 6(b) is a half-sectional view, and fig. 6(c) is a top sectional view.

Fig. 7 is a three-dimensional view of an integrated high-efficiency condensing gas water heater in an inverted spray form, wherein fig. 7(a) is a front view and fig. 7(b) is a half-sectional view.

Fig. 8 is a three-dimensional view of an integrated high-efficiency condensing gas water heater using a combination of top-mounted and inverted showers, wherein fig. 8(a) is a front view and fig. 8(b) is a half-sectional view.

Fig. 9 is a detailed view of the spraying system, wherein fig. 9(1a), 9(2a), 9(3a) and 9(4a) respectively show the arrangement of the single-stage or multi-stage atomizing nozzles 44 with the cross section of the ring pipe 43 being trapezoid, oval, elliptical and circular ring, fig. 9(1b), 9(2b), 9(3b) and 9(4b) respectively show the atomizing nozzles 44 being oval, square, circular and elliptical in appearance, and fig. 9(c) shows the angle between the atomizing nozzles 44 and the vertical direction.

Fig. 10 is a schematic view of various external appearances of the burner 1, in which fig. 10(a), fig. 10(b), and fig. 10(c) are respectively circular, oval, and elliptical.

FIG. 11 is a schematic view of a left-right arranged indirect and direct contact heat exchange integrated high-efficiency condensation gas water heater.

FIG. 12 is a schematic view of an indirect and direct contact heat exchange integrated high-efficiency condensing gas water heater arranged up and down.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific embodiments:

example one

As shown in fig. 2(a) and 2(b) of fig. 2, the utility model relates to a high-efficiency condensation gas water heater structure with mixed heat exchange, which comprises a combustor 1 for generating high-temperature flue gas by combustion, a heat exchanger 2 for wrapping the combustor 1 to absorb the heat of the high-temperature flue gas, a spraying system (4) arranged on the heat exchanger (2), an isobaric smoke hood (3) for isolating the spraying system (4) from the heat exchanger (2) and forming a flue gas isobaric channel on the outer wall of the heat exchanger (2), a shell (5) for wrapping the combustor (1), the heat exchanger (2), the isobaric smoke hood (3) and the spraying system (4), and a chimney (6) arranged on the shell (5); the low-temperature flue gas after heat release by the heat exchanger (2) is further absorbed by a spraying system 4 through a channel between the shell 5 and the isobaric smoke hood 3 to absorb sensible heat and latent heat, and is finally discharged from a chimney 6.

The heat exchanger 2 comprises a heat exchanger main body 21, a heat exchanger water inlet 22 and a heat exchanger water outlet 23 which are communicated with the heat exchanger main body (21).

The isobaric smoke hood 3 comprises a cover plate 31 and a low-temperature smoke outlet 32 positioned at the bottom end of the isobaric smoke hood 3.

The spraying system 4 comprises a spraying liquid inlet 41 positioned at the top end of the shell 5, a flow equalizing pipe 42 connecting the spraying liquid inlet 41 and the circular pipe 43, and an atomizing nozzle 44 positioned at the bottom end of the circular pipe 43, wherein the circular pipe 43 is positioned between the flow equalizing pipe 42 and the cover plate 31 in the vertical direction, the circular pipe 43 and the flow equalizing pipe 42 form an included angle of 90-120 degrees, and a condensate water outlet 45 and a spraying liquid outlet 46 positioned at the bottom end of the shell 5.

The housing 5 includes a chimney connection passage 51 at the top of the housing 5 and a presentation tray 52 at the bottom.

The temperature of the wall surface of the heat exchanger main body 21 is controlled to be higher than 60 ℃ under any working condition, and preferably the temperature of exhaust gas is controlled to be about 200 ℃ under any working condition, so that no condensed water is generated on the wall surface of the heat exchanger.

The heat exchanger main body 21 does not produce condensed water under any working condition, and the problems of condensed water corrosion and the like can not occur, and a copper fin tube heat exchanger with a water collecting disc structure is adopted to form a four-return water working medium flow channel.

The heat exchanger water inlet 22 and the heat exchanger water outlet 23 are arranged at the bottom of the copper fin tube heat exchanger with a water collecting tray structure and connected with the water collecting tray at the bottom of the heat exchanger.

Isobaric petticoat pipe 3 and the equipressure flue gas channel between isobaric petticoat pipe 3 and heat exchanger main part 21 are passed through to the isobaric flow of flue gas under the angle that vertical direction is capable of making rated load, guarantees the even heat transfer of high temperature flue gas in the heat exchanger main part 21, apron 31 is designed for top, bottom or top and bottom dual arrangement in order to ensure that heat exchanger 2 can place in isobaric petticoat pipe 3 according to heat exchanger water inlet 22 and the 23 arrangement mode of heat exchanger delivery port, and the low temperature exhanst gas outlet 32 that is located isobaric petticoat pipe 3 bottom is even 18 annular trompils, has the spoke between two liang, strengthens structural strength, and low temperature exhanst gas.

The isobaric smoke hood 3 is independently manufactured, and plastic, stainless steel or glass steel materials with low heat exchange coefficient and temperature resistance are adopted to prevent the spray liquid and low-temperature smoke gas from exchanging heat to enable the inner wall of the isobaric smoke hood 3 to generate condensed water.

The spraying liquid inlet 41 at the top end of the shell 5 is arranged on the central shaft of the water heater, 3 equalizing pipes 42 are arranged between the annular pipe 43 and the spraying liquid inlet 41 to enable the spraying liquid to uniformly flow into the annular pipe 43 from the spraying liquid inlet 41, and the spraying liquid is atomized and sprayed out by 18 atomizing nozzles 44 at the bottom end of the equalizing pipes 42.

The condensed water outlet 45 is positioned at the bottom end of the shell 5, the U-shaped structure of the condensed water outlet enables the dew-presenting disc 52 to accumulate a certain liquid level, the condensed water generated in the continuous operation of the water heater is discharged from the condensed water outlet 45, the spraying liquid outlet 46 is used for discharging the circulating spraying liquid, the circulating spraying liquid is also positioned at the bottom end of the shell 5 but is higher than the condensed water outlet 45, and the circulating spraying liquid adopts a safe, nontoxic, good in thermal conductivity, low in viscosity and hydrophobic organic solution.

The shell 5 is made of stainless steel, cast aluminum silicon or plastic materials resistant to condensed water corrosion, the exposure disc 52 has a certain height to contain circulating spray liquid and condensed water, and meanwhile, the circulating spray liquid is separated from the condensed water by heat conduction oil or other safe, nontoxic, good in heat conductivity, low in viscosity and hydrophobic organic solutions, and the condensed water and the circulating spray liquid are discharged from the bottom condensed water outlet 45 and the spray liquid outlet 46 respectively.

As shown in fig. 1, the synergistic energy-saving system of the hybrid heat exchange efficient condensation gas water heater comprises a heat pump system 7, a plate heat exchanger 8, a valve group 9 and the hybrid heat exchange efficient condensation gas water heater structure, wherein the heat exchanger 2 and a condenser 72 in the heat pump system 7 form a main body heat exchange subsystem, and the main body heat exchange subsystem is connected in the following manner: the heat exchanger water outlet 23, the plate heat exchanger 8 inlet, the plate heat exchanger 8 outlet-condenser 72 inlet, the condenser 72 outlet, and the heat exchanger water inlet 22 are connected in sequence, the spraying system 4 and the evaporator 71 in the heat pump system 7 form a secondary spraying heat exchange subsystem, and the connection mode of the secondary spraying heat exchange subsystem is as follows: the spraying liquid outlet 46, the evaporator 71 inlet, the evaporator 71 outlet and the spraying liquid inlet 41 are connected in sequence; the inlet and outlet pipelines of the evaporator 71 and the condenser 72 in the heat pump system 7 are respectively provided with a valve 91 to form a valve group 9, the inlet and outlet short-circuit pipelines of the condenser 72 are provided with a short-circuit valve 92, when the heat pump system 7 is started, the short-circuit valve 92 is closed, all the valves 91 in the valve group 9 are opened, and when the heat pump system is closed, all the valves 91 in the valve group 9 are closed. The parallel connection of the heat pump system 7 can reduce the temperature of the circulating spray liquid to further enhance the condensation heat transfer efficiency of the low-temperature flue gas, improve the return water temperature of the water inlet 22 of the heat exchanger, realize synergistic coupling of the water heater and the heat pump, effectively improve the operation efficiency of the whole system and reduce the sensitivity of the fluctuation of the return water temperature of the load to the operation efficiency.

Example II

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 3(a) and 3(b) of fig. 3, the isobaric hood 3 is connected with the outer shell 5, and the isobaric hood 3 and the outer shell 5 can be integrally formed by adopting an injection molding process or casting iron and aluminum alloy, so that the installation of the heat exchanger 2 and the arrangement of the heat exchanger water inlet 22 and the heat exchanger water outlet 23 are convenient.

Example three

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 4(a), 4(b) and 4(c) of fig. 4, the spraying liquid inlet 41 is arranged on the periphery of the shell 5, a single-side or double-side liquid inlet mode is adopted, and a high-pressure flow equalizing spraying mode is adopted to eliminate a flow equalizing pipe 42 structure, so that the manufacturing process is simplified and the structural strength is ensured.

Example four

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 5(a), 5(b), 5(c) and 5(d), the isobaric smoke hood 3 is vertically arranged, the surface of the isobaric smoke hood 3 is provided with uniform ridge type exhaust ports, so that low-temperature smoke is uniformly discharged annularly, condensed water, circulating spray liquid and circulating spray liquid can be effectively isolated, and the isobaric smoke hood 3 can be manufactured by adopting an injection molding process or a cast aluminum alloy or a stamped stainless steel.

Example five

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 6(a), 6(b) and 6(c) of fig. 6, the spraying system 4 comprises 2-6 stages of loop pipes 43, and the whole operation efficiency of the water heater is improved by adopting the optimized heat exchange of graded spraying.

Example six

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 7(a) and 7(b) of fig. 7, the spraying system 4 is in the form of an integral inverted spray, and may also be in the form of a top and bottom double-side arrangement spraying system 4 as shown in fig. 8(a) and 8(b) of fig. 8.

Example seven

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 9, fig. 9(1a), 9(2a), 9(3a) and 9(4a), the cross section of the ring pipe 43 may be trapezoidal, oval, elliptical or circular, and 1 to 4 single-stage or multi-stage atomizing nozzles 44 may be simultaneously arranged on the cross section of the ring pipe 43, as shown in fig. 9(1b), 9(2b), 9(3b) and 9(4b), the cross section of the atomizing nozzle 44 may be oval, square, circular or elliptical, as shown in fig. 9(c), and the angle θ between the atomizing nozzle 44 and the vertical direction is 0 to 90 °.

Eight implementation cases

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 10(a), 10(b) and 10(c) of fig. 10, the burner 1 may have a circular, oval or elliptical cross-sectional shape, and the burner 1 may be disposed on the central line of the water heater as a whole and may be offset to optimize the flow of flue gas and reduce the flow resistance.

Example nine

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 11, the burner 1 is placed on one side of the housing 5, and the burner 1, the heat exchanger 2 and the spraying system 4 are arranged in the left-right or front-back direction.

Ten implementation cases

In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the same description thereof is omitted.

As shown in fig. 12, the burner 1 is placed on the top of the housing 5, and the burner 1, the heat exchanger 2 and the spraying system 4 are arranged from top to bottom.

Claims (10)

1. The utility model provides a high-efficient condensation gas hot water stove structure of hybrid heat exchange which characterized in that: the device comprises a combustor (1) for generating high-temperature flue gas through combustion, a heat exchanger (2) for absorbing heat of the high-temperature flue gas, an isobaric smoke hood (3) for isolating a spray system (4) from the heat exchanger (2) and forming a flue gas isobaric channel on the outer wall of the heat exchanger (2), a shell (5) for coating the combustor (1), the heat exchanger (2), the isobaric smoke hood (3) and the spray system (4), and a chimney (6) arranged on the shell (5);

the cross section of the burner (1) is circular, oval or elliptical, and is arranged on the central line of the whole hot water furnace or is offset from the central line of the whole hot water furnace so as to optimize the flow of smoke and reduce the flow resistance;

the heat exchanger (2) comprises a heat exchanger main body (21), a heat exchanger water inlet (22) and a heat exchanger water outlet (23) which are communicated with the heat exchanger main body (21);

the isobaric smoke hood (3) comprises a cover plate (31) and a low-temperature smoke outlet (32);

the spraying system (4) comprises a spraying liquid inlet (41) positioned at the top end of the shell (5) or on the peripheral side of the shell (5), when the spraying liquid inlet (41) is positioned at the top end of the shell (5), the spraying system comprises a flow equalizing pipe (42) for connecting the spraying liquid inlet (41) and a ring pipe (43), the ring pipe (43) is positioned between the flow equalizing pipe (42) and the cover plate (31) in the vertical direction, and the ring pipe (43) and the flow equalizing pipe (42) form an included angle of 90-120 degrees, when the spraying liquid inlet (41) is positioned on the peripheral side of the shell (5), a high-pressure flow equalizing spraying mode is adopted to eliminate the structure of the flow equalizing pipe (42), the manufacturing process is simplified, the structural strength is ensured, and the ring pipe (43) is highly parallel; the atomizing nozzle (44) is positioned at the bottom end of the ring pipe (43), and the condensed water outlet (45) and the spraying liquid outlet (46) are positioned at the bottom end of the shell (5);

the top in the shell (5) is provided with a chimney connecting channel (51), and the bottom is provided with a dew presenting disc (52).

2. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the heat exchanger main body (21) is made of cast aluminum, cast iron, carbon steel, welded stainless steel, copper or copper fin tube materials.

3. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the heat exchanger water inlet (22) and the heat exchanger water outlet (23) are arranged at the bottom of the heat exchanger main body (21) or are respectively arranged at the bottom or the top according to different types of the heat exchanger main body (21).

4. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the isobaric smoke hood (3) is manufactured independently or integrally with the shell (5), the isobaric smoke hood (3) forms a preset angle with the vertical direction when adopting a low-temperature smoke outlet (32) at the bottom, or the surface of the isobaric smoke hood (3) is provided with an even ridge type exhaust port and forms a vertical arrangement mode, a cover plate (31) of the isobaric smoke hood (3) is designed into a top part and a bottom part or is dually arranged with the top part and the bottom part according to the arrangement mode of a water inlet (22) and a water outlet (23) of a heat exchanger so as to ensure that the heat exchanger (2) can be placed in the isobaric smoke hood (3), the low-temperature smoke outlet (32) at the bottom of the isobaric smoke hood (3) is provided with 4-24 annular holes uniformly, spokes are arranged between every two, the structural strength is strengthened, an included angle between the plane where the low-temperature smoke outlet (32) is positioned and the horizontal direction is, the top cover plate (31) has a structure of a low-temperature flue gas outlet (32).

5. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the isobaric smoke hood (3) is of a single-layer or double-layer structure and is made of cast aluminum, cast iron, stainless steel or temperature-resistant plastic and glass fiber reinforced plastic with low heat conductivity coefficient.

6. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: when the spray liquid inlet (41) is located at the top end of the shell (5), 3-9 flow equalizing pipes (42) are connected between the spray liquid inlet (41) and the circular pipe (43), so that spray liquid uniformly flows into the circular pipe (43) from the spray liquid inlet (41), the cross section of the circular pipe (43) is trapezoidal, oval, elliptical or circular, 6-18 atomizing nozzles (44) are arranged on the circular pipe (43) in the circumferential direction, 1-4 atomizing nozzles (44) are arranged in the radial direction, the cross section of each atomizing nozzle (44) is oval, square, circular or elliptical, and the angle theta between the cross section of each atomizing nozzle and the vertical direction is 0-90 degrees, the circular pipe (43) adopts a single circular pipe or a multi-circular pipe to form a single-stage or multi-stage spray system (4), and the spray system (4) adopts a spray mode of top-top arrangement or top-top arrangement and reverse arrangement to realize high.

7. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the condensation water outlet (45) is of a U-shaped structure, so that the exposure disc (52) can accumulate a certain liquid level, condensation water generated in the continuous operation of the water heater is discharged from the condensation water outlet (45), the spraying liquid outlet (46) is used for discharging circulating spraying liquid, the circulating spraying liquid is also positioned at the bottom end of the shell (5) but is higher than the condensation water outlet (45), and the circulating spraying liquid adopts a safe, non-toxic, organic working medium or a water working medium with good thermal conductivity, low viscosity and hydrophobicity.

8. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: the shell (5) is made of stainless steel, cast aluminum silicon or plastic materials resistant to condensate water corrosion, the exposure disc (52) has a certain height to contain circulating spray liquid and condensate water, and meanwhile, the circulating spray liquid is separated from the condensate water by using a safe, non-toxic, good-heat-conductivity, low-viscosity and hydrophobic organic working medium, so that the condensate water and the circulating spray liquid are discharged from a condensate water outlet (45) and a spray liquid outlet (46) at the bottom respectively.

9. The high-efficiency condensing gas hot water furnace structure of mixed heat exchange according to claim 1, characterized in that: according to the position relation of the heat exchanger (2) and the spraying system (4), the arrangement form of the water heater is in a surrounding arrangement form, a left-right arrangement form or an up-down arrangement form.

10. The utility model provides a high-efficient condensation gas hot water furnace system of hybrid heat exchange which characterized in that: the high-efficiency condensation gas water heating furnace structure with mixed heat exchange comprises a heat pump system (7), a plate type heat exchanger (8), a valve group (9) and the high-efficiency condensation gas water heating furnace structure with mixed heat exchange as claimed in any one of claims 1 to 8, wherein the heat exchanger (2) and a condenser (72) in the heat pump system (7) form a main body heat exchange subsystem, and the main body heat exchange subsystem is connected in a way that: the heat exchanger water outlet (23), the plate heat exchanger (8) import, the plate heat exchanger (8) export-condenser (72) import, condenser (72) export, heat exchanger water inlet (22) connect gradually, evaporimeter (71) in sprinkling system (4) and the heat pump system (7) constitute secondary and spray the heat transfer subsystem, and the connected mode that secondary sprayed the heat transfer subsystem is: the spraying liquid outlet (46), the evaporator (71) inlet, the evaporator (71) outlet and the spraying liquid inlet (41) are connected in sequence; the inlet and outlet pipelines of the evaporator (71) and the condenser (72) in the heat pump system (7) are respectively provided with a valve (91) to form a valve group (9), and the inlet and outlet short-circuit pipelines of the condenser (72) are provided with a short-circuit valve (92).

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