A vertically placed reverse convection air-water heat exchanger device

Abstract

The present invention discloses a vertically placed reverse convection air-water heat exchanger device, comprising: an air-water heat exchange water tank, a handrail frame, a reduced-diameter air inlet duct, a reduced-diameter air outlet duct, an air inlet thermometer, an air outlet thermometer, a hot water thermometer, a cold water thermometer, a balanced inlet and outlet water pipe device, a top plate, a bottom plate, heat dissipation pipes, a spare water discharge pipe, a condensate collection box, and a fixed base bracket. The device is reasonably and compactly designed. By providing an atmospheric balance pipe on the device, not only the water inlet and drainage are smooth, but also the water tank is in a non-pressurized state, which can reduce the probability of leakage at the connection between the water tank and the heat dissipation pipes. By providing a handrail frame, the stability is increased, and it is safe and convenient for maintenance. In addition, according to the temperature and total flow value of the waste heat discharged by users, standardized and serialized production and promotion can be achieved by adjusting the number and length of the intermediate heat dissipation pipes and configuring upper and lower bottom plates suitable for the flow rate. In particular, it is suitable for the promotion and utilization of waste heat recovery from high, medium, and low temperature emissions of combustion equipment using clean energy natural gas.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust heat utilization, and in particular to a vertically placed reverse convection air-water heat exchanger device. Background Art

[0002] Currently, in the social energy field, it is an inevitable trend to promote the use of clean energy such as natural gas to replace and ban coal-fired boilers. However, a large amount of water vapor generated after the combustion of gas-fired devices such as gas boilers is discharged into the environment along with high-temperature flue gas. Currently, the flue gas temperature of gas-using equipment is generally very high, usually around 160 - 250 degrees. The waste heat of the flue gas cannot be recovered. Although many domestic manufacturers are also producing waste heat recovery devices, due to the limitations of the existing structure, generally the final exhaust air temperature is restricted to not be lower than the dew point temperature, and due to dew point corrosion, the exhaust air temperature is relatively high. The average exhaust heat utilization rate is about 30% - 50%. Moreover, since the existing air-water exchangers generally use hollow heat dissipation tubes, and the waste heat gas absorbs heat through the heat dissipation fins outside the tubes to increase the heat conduction efficiency of the tube wall, because the condensed water is easy to block, the maintenance is troublesome, and the service life is low. Generally, the exhaust air temperature after low-temperature recovery is still too high, 50 - 80 degrees or even higher, and the waste heat recovery efficiency is generally not high. In addition, harmful gases such as nitrogen monoxide and nitrogen dioxide generated by gas boilers are directly discharged, affecting the environment. Some manufacturers add condensing heat exchangers including heat pump-type power devices after the waste heat recovery device to reduce the exhaust air temperature. Although the heat energy recovery rate is improved, the device structure is complex and the cost is high. Due to various reasons, the waste heat recovery rate fluctuates greatly and the maintenance cost is also high, which is not conducive to the full promotion of waste heat recovery devices. In addition, the large-scale discharge of low-temperature waste gas at 60 - 100 degrees, such as the exhaust gas from drying equipment in industries such as clothing printing and dyeing, washing, food, chemical, pharmaceutical, and catering industries, because there is no effective low-temperature waste gas recovery product, on the one hand, it pollutes the environment, and on the other hand, it wastes a huge amount of heat energy. Summary of the Invention

[0003] The purpose of the present invention is to provide a vertically placed reverse convection air-water heat exchanger device with a high heat energy recovery rate.

[0004] To achieve the above purpose, the present invention adopts the following content:

[0005] A vertically placed reverse convection air-water heat exchanger device, comprising: an air-water heat exchange water tank, a handrail frame, an air inlet reducer duct, an air outlet reducer duct, an air inlet thermometer, an air outlet thermometer, a hot water thermometer, a cold water thermometer, a balanced inlet and outlet water pipe device, a top plate, a bottom plate, a heat dissipation tube, a spare water discharge pipe, a condensed water collection box, and a fixed base bracket; the air-water heat exchange water tank is longitudinally arranged at the upper end of the fixed base bracket; the handrail frame is arranged at the rear side of the air-water heat exchange water tank, and the bottom end of the handrail frame is fixed on the fixed base bracket;

[0006] At the upper end of the air-water heat exchange water tank, there is a top plate with a flange, and at the lower end, there is a bottom plate with a flange. Moreover, between the top plate and the bottom plate, there is a sealed connection with the inner shell plate of the air-water heat exchange water tank; at the longitudinal center of the air-water heat exchange water tank, an equilibrium inlet and outlet water pipe device is provided, and the upper and lower ends of the equilibrium inlet and outlet water pipe device respectively extend out of the top plate and the bottom plate, and are hermetically connected to the top plate and the bottom plate; on the air-water heat exchange water tank around the equilibrium inlet and outlet water pipe device, heat dissipation pipes are arranged in the up and down direction, and the upper end of the heat dissipation pipe extends out of the top plate, and the lower end extends out of the bottom plate, and the heat dissipation pipe is hermetically connected to the top plate and the bottom plate; at the upper end of the top plate, an air inlet reducer air duct is provided; at the rear side of the air inlet reducer air duct, a maintenance movable door is provided; at the bottom end of the bottom plate, an air outlet reducer air duct is provided; at the bottom end of the air outlet reducer air duct, a condensate water collection box is provided; on the middle side surface of the air-water heat exchange water tank, a spare water discharge pipe is provided;

[0007] On one side of the air inlet reducer air duct, a hot water temperature gauge and an air inlet temperature gauge are respectively provided, and the hot water temperature gauge is used in cooperation with the hot water outlet pipe, and the air inlet temperature gauge is used in cooperation with the air inlet reducer air duct; on one side of the air outlet reducer air duct, an air outlet temperature gauge and a cold water temperature gauge are respectively provided, and the air outlet temperature gauge is used in cooperation with the air outlet reducer air duct, and the cold water temperature gauge is used in cooperation with the cold water inlet pipe.

[0008] Preferably, the intermediate sealing pipe is circular or square.

[0009] Preferably, the hot water outlet pipe and the cold water inlet pipe are centrosymmetric.

[0010] Preferably, there are several heat dissipation pipes, and they are evenly arranged on the air-water heat exchange water tank.

[0011] Preferably, the heat dissipation pipe is circular or square.

[0012] Preferably, a water tank fixing frame is arranged on the outer surface of the air-water heat exchange water tank, an outer shell plate is arranged on the outside of the water tank fixing frame, and heat insulation materials are filled between the inner shell plate and the outer shell plate of the water tank to facilitate protecting the heat energy of the hot water in the water tank and preventing it from dissipating.

[0013] Preferably, the air inlet reducer air duct and the air outlet reducer air duct are centrosymmetric.

[0014] Preferably, an outlet water reuse valve is arranged on the hot water outlet pipe; a cold water inlet valve is arranged on the cold water inlet pipe; a sewage cleaning valve is arranged on the sewage pipe; a spare water discharge valve is arranged on the spare water discharge pipe.

[0015] The present invention has the following advantages:

[0016] This device has a simple structure, is reasonably and compactly designed, occupies a small area, and is easy to operate. By setting an atmospheric balance pipe on this device, the probability of leakage at the connection between the water tank and the heat dissipation pipe can be reduced, and it is convenient for users to maintain and repair. In addition, according to the temperature and flow rate values of the waste heat discharged by users, by adjusting the number and length of the intermediate heat dissipation pipes, standardized and serialized production and promotion can be achieved, especially the promotion and utilization of combustion equipment using clean energy natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further elaborates on the specific embodiments of the present invention in conjunction with the drawings.

[0018] Figure 1 It is a schematic diagram of a vertically placed reverse convection gas-water heat exchanger device of the present invention.

[0019] Figure 2 It is a front view of a vertically placed reverse convection gas-water heat exchanger device of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the gas-water heat exchange water tank.

[0021] Figure 4 It is a front view of the gas-water heat exchange water tank.

[0022] Figure 5 It is Figure 4 The A-A sectional view of

[0023] Figure 6 It is a schematic diagram of the structure of the fixed base bracket.

[0024] Figure 7 It is a schematic diagram of the structure of the air inlet reducer duct.

[0025] Figure 8 It is a schematic diagram of the structure of the air outlet reducer duct.

[0026] Figure 9 It is a schematic diagram of the structure of the flange top plate.

[0027] Figure 10 It is a schematic diagram of the structure of the flange bottom plate.

[0028] Figure 11 It is a schematic diagram of the balanced inlet and outlet water pipe device.

[0029] Figure 12 It is a front view of the balanced inlet and outlet water pipe device.

[0030] In the figure, the reference numerals for each part are:

[0031] 1 - Gas - water heat exchange water tank, 2 - Reducing air inlet duct, 3 - Reducing air outlet duct, 4 - Balanced inlet - outlet water pipe device, 41 - Intermediate sealing pipe, 42 - First inlet - outlet water component, 43 - Second inlet - outlet water component, 44 - Hot water outlet pipe, 45 - Vent port, 46 - Cold water inlet pipe, 47 - Drain pipe, 48 - Atmospheric balance pipe, 49 - Through - hole, 410 - Plug, 5 - Top plate, 6 - Bottom plate, 7 - Heat dissipation pipe, 8 - Spare water discharge pipe, 9 - Condensate water collection box, 10 - Fixed base bracket, 11 - Water reuse valve, 12 - Cold water inlet valve, 13 - Drain cleaning valve, 14 - Spare water discharge valve, 15 - Handrail frame, 16 - Hot water thermometer, 17 - Air inlet thermometer, 18 - Air outlet thermometer, 19 - Cold water thermometer, 20 - Maintenance access door, 21 - Inner shell plate, 22 - Water tank fixing bracket, 23 - Thermal insulation material, 24 - Outer shell plate. Detailed implementation manners

[0032] To describe the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0033] As Figures 1 to 12 shown, a vertically - placed reverse - convection gas - water heat exchanger device includes: a gas - water heat exchange water tank 1, a reducing air inlet duct 2, a reducing air outlet duct 3, a balanced inlet - outlet water pipe device 4, a top plate 5, a bottom plate 6, a heat dissipation pipe 7, a spare water discharge pipe 8, a condensate water collection box 9, a fixed base bracket 10, a handrail frame 15, an air inlet thermometer 17, an air outlet thermometer 18, a hot water thermometer 16, and a cold water thermometer 19; a gas - water heat exchange water tank 1 is longitudinally arranged at the upper end of the fixed base bracket 10. By setting the fixed base bracket 10, it is convenient to support the gas - water heat exchange water tank 1 and increase its stability; the handrail frame 15 is arranged at the rear side of the gas - water heat exchange water tank 1, and the bottom end of the handrail frame 15 is fixed on the fixed base bracket 10; because the gas - water heat exchange water tank 1 must be vertically placed and has a certain height, the handrail frame 15 is added, fixed on the water tank on one side and fixed on the fixed base bracket 10 on the other side, increasing stability and being safe and convenient for maintenance.

[0034] At the upper end of the air-water heat exchange water tank 1, there is a top plate 5 with a flange, and at the lower end, there is a bottom plate 6 with a flange. Moreover, between the top plate 5 and the bottom plate 6, they are all hermetically connected to the inner shell plate 21 of the air-water heat exchange water tank 1. At the longitudinal center of the air-water heat exchange water tank 1, an equilibrium inlet and outlet water pipe device 4 is provided, and the upper and lower ends of the equilibrium inlet and outlet water pipe device 4 respectively extend out of the top plate 5 and the bottom plate 6, and the equilibrium inlet and outlet water pipe device 4 is also hermetically connected to the top plate 5 and the bottom plate 6; on the air-water heat exchange water tank 1 around the equilibrium inlet and outlet water pipe device 4, heat dissipation pipes 7 are arranged in the up and down direction, and the upper end of the heat dissipation pipe 7 extends out of the top plate 5, and the lower end extends out of the bottom plate 6, and the heat dissipation pipe 7 is also hermetically connected to the top plate 5 and the bottom plate 6; at the upper end of the top plate 5, an air inlet variable diameter air duct 2 is provided, and at the rear side of the air inlet variable diameter air duct 2, a maintenance movable door 20 is provided. Because of the recovery of residual heat, over time, impurities will remain at the upper opening of the air-water heat exchange water tank 1, and dust and sundries will adhere to the inner wall of the heat dissipation pipe 7. It is necessary to regularly spray or blow the impurities one by one from top to bottom with a high-pressure air water gun to ensure the long-term reliable stability of the heat exchange efficiency. Therefore, the maintenance movable door 20 is provided to facilitate the cleaning of the internal dust of this device; at the bottom end of the bottom plate 6, an air outlet variable diameter air duct 2 is provided, and at the bottom end of the air outlet variable diameter air duct 2, a condensate water collection box 9 is provided. By setting the condensate water collection box 9, it is convenient to discharge the condensate water in a directional manner and optimize the environmental protection and sanitation of the working environment; on the middle side of the air-water heat exchange water tank 1, a spare water discharge pipe 8 is provided, which is convenient for draining all the hot water in the air-water heat exchange water tank 1 when this device is not in use, for bathing, washing clothes, etc.

[0035] On one side of the air inlet variable diameter air duct 2, a hot water thermometer 16 and an air inlet thermometer 17 are respectively provided, and the hot water thermometer 16 is used in cooperation with the hot water outlet pipe 44, and the air inlet thermometer 17 is used in cooperation with the air inlet variable diameter air duct 2; on one side of the air outlet variable diameter air duct 3, an air outlet thermometer 18 and a cold water thermometer 19 are respectively provided, and the air outlet thermometer 18 is used in cooperation with the air outlet variable diameter air duct 3, and the cold water thermometer 19 is used in cooperation with the cold water inlet pipe 46. By setting various thermometers, the heat energy recovery efficiency can be visually displayed, which is convenient for adjusting the water inlet flow according to specific needs, so as to adjust the temperature of the recovered water and the temperature of the external exhaust air, and maximize the heat energy recovery efficiency.

[0036] Furthermore, the balanced inlet and outlet pipe device 4 includes an intermediate sealing pipe 41, a first inlet and outlet assembly 42, a second inlet and outlet assembly 43, a hot water outlet pipe 44, a vent 45, a cold water inlet pipe 46, a sewage pipe 47, an atmospheric balance pipe 48, a through hole 49, and a plug 410; a first inlet and outlet assembly 42 is provided at the upper end of the intermediate sealing pipe 41, and a second inlet and outlet assembly 43 is provided at the bottom end of the intermediate sealing pipe 41; a hot water outlet pipe 44 is provided on one side of the first inlet and outlet assembly 42; a vent 45 is opened at the top end of the first inlet and outlet assembly 42, and an atmospheric balance pipe 48 is provided on the vent 45, and the atmospheric balance pipe 48 penetrates through the air inlet reducer duct 3; a cold water inlet pipe 46 and a sewage pipe 47 are respectively provided on the side surface of the second inlet and outlet assembly 43, and the position of the sewage pipe 47 is below the cold water inlet pipe 46, and the sewage pipe 47 is perpendicular to the cold water inlet pipe 46; the other ends of the hot water outlet pipe 44, the cold water inlet pipe 46, and the sewage pipe 47 all extend out of the air-water heat exchange water tank 1; through holes 49 are provided on both the first inlet and outlet assembly 42 and the second inlet and outlet assembly 43, and the through holes 49 penetrate through the intermediate sealing pipe 41, and the through holes are provided to facilitate communication with the heat exchange box body 1; the heat dissipation pipes 7, the balanced inlet and outlet pipe device 4, the sewage pipe 47, and the atmospheric balance pipe 48 are arranged to ensure that they can withstand high-temperature thermal deformation without leakage.

[0037] Furthermore, the intermediate sealing pipe 41 is circular or square, and the square setting can better perform heat exchange.

[0038] Furthermore, the hot water outlet pipe 44 and the cold water inlet pipe 46 are centrosymmetric.

[0039] Furthermore, there are several heat dissipation pipes 7, and they are evenly arranged on the air-water heat exchange water tank 1.

[0040] Furthermore, the heat dissipation pipe 7 is circular or square. When the same amount of heat is involved, the square heat dissipation pipe 7 has a larger contact area with water, so the heat exchange effect is also the best.

[0041] Furthermore, a water tank fixing frame 22 is provided on the outer surface of the air-water heat exchange water tank 1, an outer shell plate 24 is provided on the outside of the water tank fixing frame 22, and a heat insulating material 23 is filled between the inner water tank shell plate 21 and the outer shell plate 24 to facilitate protecting the heat energy of the hot water in the water tank and preventing it from dissipating.

[0042] Furthermore, the air inlet reducer duct 2 and the air outlet reducer duct 3 are centrosymmetric.

[0043] Furthermore, a water recycling valve 11 is provided on the hot water outlet pipe 44, a cold water inlet valve 12 is provided on the cold water inlet pipe 46, and a sewage cleaning valve 13 is provided on the sewage pipe 47. The sewage cleaning valve 13 is provided to facilitate regular cleaning of dirt in the water tank; a spare drain valve 14 is provided on the spare drain pipe 8; and valves are provided on each pipeline to facilitate flow control.

[0044] Since the device utilizes a vertically placed air-water heat exchange water tank 1, the water temperature rises from the low temperature at the bottom to the upper temperature, and the temperature difference between the upper and lower parts is the largest, while the temperature of the waste heat gas gradually decreases from the top to the bottom through the vertically arranged heat dissipation pipe 7, forming a reverse convection of temperature rise, so that the waste heat gas is always under a high temperature difference condition during movement, and the thermal conductivity of the vertically arranged water bucket water has no up and down convection, and only the low-temperature water flows upward. When the aperture length of the closely arranged heat dissipation pipe 7 and the flow rate of the waste heat gas and water are appropriate, the heat energy of the waste heat gas can be efficiently recovered, the exhaust temperature can be close to the normal ambient temperature (cooling water temperature), and the selective recovery of heated hot water at 80-100 degrees can be realized, and nearly 90%-100% exhaust waste heat recovery can be achieved, and the recovery effect is beyond imagination.

[0045] The device can recover waste heat below the dew point temperature, and condense into water in the condensate water collection box 9, while absorbing part of Co2 and Nox in the flue gas, purifying the exhaust flue gas, and having good energy-saving and emission-reduction functions.

[0046] The structure of the device is simple and practical. In the vertically placed gas-water heat exchange water tank 1, there is a vertically discharged corrosion-resistant stainless steel pipe (rectangular pipe) in the middle. The inner wall of the pipe hole circulates high-temperature flue gas, and the outer wall of the pipe is fully in contact with water in the water tank. Due to reverse convection and the unique characteristics of water, the high-temperature hot water can only rise in one direction. There is no heat convection between hot water and cold water, only heat conduction, resulting in a unique phenomenon of a large difference in temperature between the water in the water tank, while the temperature of the high-temperature flue gas is high at the top and low at the bottom. In this way, the heat exchange between the flue gas and the water is always under the condition of high temperature difference, and the heat exchange is sufficient. In addition, since the corrosion-resistant stainless steel pipe is used as the heat dissipation pipe 7, the existing heat dissipation fins are completely eliminated. The frequent corrosion of dirt cleaning, inconvenience and short service life are completely eliminated. Moreover, if there is a pipe leak, it is more convenient to repair it on both sides. Since the heat dissipation pipe 7 is arranged up and down, the airflow is unobstructed from top to bottom and the pipe is not easy to be blocked. It is also very convenient to clean the dirt after a long time of use. It only needs to be cleaned hole by hole from top to bottom with a high-pressure gun and a special detergent to ensure that the waste heat recovery device can work normally and efficiently for a long time.

[0047] This device is placed vertically, with a compact structure, small floor area and convenient installation. Due to the ventilation balance and non-pressure structure design of the intermediate gas-water heat exchange water tank, the leakage probability is very low, and it is convenient for users to operate, use, maintain and repair. In addition, according to the temperature and flow values of the waste heat discharged by users, by adjusting the number and length of the intermediate heat dissipation pipes 7, standardized and serialized production and promotion can be achieved, especially the popularization and utilization of combustion equipment using clean energy natural gas.

[0048] This device is especially suitable for the recovery of low-temperature waste gas heat energy with a large quantity and wide distribution in the Chinese market, such as the tail gas emissions of drying equipment in industries such as clothing printing and dyeing, washing, water washing, food, chemical industry, pharmaceutical catering, etc., with an exhaust air temperature of 60-100 degrees, and the recovered water temperature can also reach the corresponding 60-100 degrees, achieving an unexpected effect.

[0049] In the case of gas exhaust waste heat recovery, generally one cubic meter of natural gas can generate 1.55 kilograms of water vapor. Since the water temperature at the lower part of the gas-water heat exchanger of this device is very low and close to the inlet water temperature, the flue gas temperature can be completely reduced below the dew point temperature. In this way, the sensible heat in the flue gas can be absorbed to the maximum extent, and at the same time, a large amount of latent heat released by the condensation of water vapor in the flue gas into water can be absorbed. And to complete the waste heat recovery process, the vapor condensation waste heat recovery process belongs to the phase change heat transfer process, with a very high heat transfer intensity. At the same time, condensation occurs in the flue gas waste heat recovery device, condensing into water, and at the same time absorbing part of the Co2 and Nox in the flue gas, cleaning the flue gas and playing an environmental protection role. The condensed water is discharged to a special sewage pool through a guiding pipe and then discharged centrally after treatment, which conforms to the general direction of energy conservation and emission reduction advocated by the country in the future.

[0050] Except for the need for a certain water pressure for water inlet, this device does not require other auxiliary devices such as heat pumps, condensing heat exchangers and other power devices. The structure and process are simple, the heat exchange rate is stable and reliable, and the manufacturing cost can be greatly reduced. The installation, use and maintenance are extremely simple.

[0051] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not limitations on the implementation modes of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to list all the implementation modes here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A vertically placed reverse convection air-water heat exchanger device, characterized in that Including: A gas-water heat exchange water tank, a handrail, a reduced-diameter air inlet duct, a reduced-diameter air outlet duct, an air inlet thermometer, an air outlet thermometer, a hot water thermometer, a cold water thermometer, an equilibrium inlet and outlet water pipe device, a top plate, a bottom plate, a heat dissipation pipe, a spare water discharge pipe, a condensate water collection box and a fixed base bracket; A gas-water heat exchange water tank is longitudinally arranged at the upper end of the fixed base bracket; The handrail is arranged at the rear side of the gas-water heat exchange water tank, and the bottom end of the handrail is fixed on the fixed base bracket; A top plate with a flange is arranged at the upper end of the gas-water heat exchange water tank, and a bottom plate with a flange is arranged at the lower end. The top plate and the bottom plate are both hermetically connected to the inner shell plate of the gas-water heat exchange water tank; An equilibrium inlet and outlet water pipe device is arranged at the longitudinal center of the gas-water heat exchange water tank, and the upper and lower ends of the equilibrium inlet and outlet water pipe device respectively extend out of the top plate and the bottom plate and are hermetically connected to the top plate and the bottom plate; Heat dissipation pipes are arranged on the gas-water heat exchange water tank around the equilibrium inlet and outlet water pipe device in the up-down direction. The upper end of the heat dissipation pipe extends out of the top plate, and the lower end extends out of the bottom plate. The heat dissipation pipe is hermetically connected to the top plate and the bottom plate; A reduced-diameter air inlet duct is arranged at the upper end of the top plate; A maintenance movable door is arranged at the rear side of the reduced-diameter air inlet duct; A reduced-diameter air outlet duct is arranged at the bottom end of the bottom plate; A condensate water collection box is arranged at the bottom end of the reduced-diameter air outlet duct; A spare water discharge pipe is arranged on the middle side surface of the gas-water heat exchange water tank; A hot water thermometer and an air inlet thermometer are respectively arranged on one side of the reduced-diameter air inlet duct; An air outlet thermometer and a cold water thermometer are respectively arranged on one side of the reduced-diameter air outlet duct; The equilibrium inlet and outlet water pipe device includes an intermediate sealing pipe, a first inlet and outlet water assembly, a second inlet and outlet water assembly, a hot water outlet pipe, a vent, a cold water inlet pipe, a sewage discharge pipe, an atmospheric balance pipe, a through hole and a plug; A first inlet and outlet water assembly is arranged at the upper end of the intermediate sealing pipe; A second inlet and outlet water assembly is arranged at the bottom end of the intermediate sealing pipe; A hot water outlet pipe is arranged on one side of the first inlet and outlet water assembly; A vent is opened at the top end of the first inlet and outlet water assembly; An atmospheric balance pipe is arranged on the vent, and the atmospheric balance pipe penetrates through the reduced-diameter air inlet duct; A cold water inlet pipe and a sewage discharge pipe are respectively arranged on the side surface of the second inlet and outlet water assembly. The position of the sewage discharge pipe is below the cold water inlet pipe, and the sewage discharge pipe is perpendicular to the cold water inlet pipe; The other ends of the hot water outlet pipe, the cold water inlet pipe and the sewage discharge pipe all extend out of the gas-water heat exchange water tank; Through holes are arranged on both the first inlet and outlet water assembly and the second inlet and outlet water assembly, and the through holes penetrate through the intermediate sealing pipe; A water tank fixing frame is arranged on the outer surface of the gas-water heat exchange water tank, and an outer shell plate is arranged on the outside of the water tank fixing frame. Heat insulation materials are filled between the inner shell plate of the water tank and the outer shell plate to facilitate protecting the heat energy of the hot water in the water tank and preventing it from dissipating; A water outlet reuse valve is arranged on the hot water outlet pipe; A cold water inlet valve is arranged on the cold water inlet pipe; A sewage cleaning valve is arranged on the sewage discharge pipe; A spare water discharge valve is arranged on the spare water discharge pipe.

2. The vertical reverse convection air-water heat exchanger device according to claim 1, characterized in that, The intermediate sealing pipe is circular or square.

3. A vertical reverse convection air-water heat exchanger device according to claim 1, characterized in that, There are several of the heat dissipation pipes, and they are evenly arranged on the gas-water heat exchange water tank.

4. A vertical reverse convection air-water heat exchanger device according to claim 3, characterized in that, The heat dissipation pipes are circular or square.

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