Condensation type gas water heater

Abstract

The utility model relates to the technical field of water heaters, and discloses a condensation type gas water heater, the condensation type gas water heater has a condensate water atomization discharge mode and a condensate water recycling mode, when any one of the condensate water atomization discharge mode and the condensate water recycling mode fails, the other mode can be started, and the condensate water atomization discharge mode and the condensate water recycling mode can be started. Condensed water in the condensation heat exchanger can be timely discharged, it is avoided that too much condensed water in the condensation heat exchanger flows back through the smoke inlet, it is guaranteed that the condensation type gas water heater can work normally, and the user experience is improved. The condensate water treatment unit is used for carrying out acid-base balance blending and impurity filtering on condensate water, and then the condensate water is atomized and discharged or recycled, so that the corrosion influence of the condensate water on the atomization unit, the condensate pump and the control valve group can be reduced, and scaling in the atomization unit, the condensate pump and the control valve group can be delayed; and the probability that condensate water blocks the atomization unit, the condensate water pump and the control valve group is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a condensing gas water heater. Background Art

[0002] Condensing gas water heaters will discharge a lot of condensed water during use. This condensed water is formed by the condensation of water vapor in the flue gas. There are currently two commonly used methods for condensed water treatment. One is to use an atomizing device to atomize the condensed water to form water mist and discharge it. The other is to use a water pump to recover the condensed water and inject it into the water system of the condensing gas water heater to achieve the recycling of the condensed water.

[0003] Existing condensing gas water heaters usually use any of the above-mentioned methods to treat condensed water. Due to the various impurities in the condensed water mixed with the flue gas, scaling is easily formed on the surface of the atomizing device or inside the water pump during use, resulting in poor working performance of both or even stopping working. At this time, in order to avoid the accumulation of too high a water level of condensed water in the condensing heat exchanger, the water heater needs to be shut down and can only be used after maintenance, which seriously affects the user experience.

[0004] Therefore, a condensing gas water heater is urgently needed to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a condensing gas water heater, which can reduce the influence of the condensed water discharge in the condensing heat exchanger on the use of the condensing gas water heater and improve the user experience.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] Condensing gas water heater, including:

[0008] The condensing heat exchanger comprises a condensing heat exchange shell, wherein the condensing heat exchange shell is provided with a smoke inlet and a smoke exhaust port;

[0009] A condensate treatment assembly, comprising a condensate treatment shell connected to the condensation heat exchange shell, and a condensate treatment unit disposed in the condensate treatment shell, wherein the condensate treatment unit is used to adjust the acid-base balance and filter impurities of the condensate;

[0010] A condensed water atomization assembly, comprising an atomization shell, and an atomization unit arranged at the bottom of the atomization shell, one end of the atomization shell is provided with a mist outlet connected to the outside atmosphere, and the atomization unit is used to atomize the condensed water in the atomization shell;

[0011] A condensate water pump, the inlet of which is connected to the condensation heat exchange shell through a condensate water treatment shell;

[0012] Condensate recovery pipe, the outlet of the condensate pump can be selectively connected to at least one of the inlets of the atomizing shell and the condensate recovery pipe through a control valve group; the outlet of the condensate recovery pipe is connected to the water system of the condensing water heater.

[0013] Compared with the background technology, the condensing gas water heater provided by the utility model has the following beneficial effects: the condensed water generated during the operation of the condensing heat exchanger is gathered at the bottom of the condensing water treatment shell, the condensed water gathered at the bottom of the condensing heat exchange shell enters the condensing water treatment shell, and the condensed water in the condensing water treatment shell is subjected to acid-base balance and impurity filtering by the condensing water treatment unit, and then the state of the control valve group can be adjusted so that the condensed water pump can send the condensed water in the condensing water treatment shell to the atomizing shell, and the atomizing unit atomizes and discharges it to the outside atmosphere; the condensed water pump can also recycle the condensed water in the condensing water treatment shell through the condensing water recovery pipe. The condensing gas water heater has a condensing water atomizing discharge mode and a condensing water recycling mode. If any of the condensing water atomizing discharge mode and the condensing water recycling mode fails, the other mode can be enabled to achieve the purpose of timely discharging the condensed water in the condensing heat exchanger, avoiding excessive condensed water in the condensing heat exchanger from flowing back through the smoke inlet, ensuring that the condensing gas water heater can work normally, and improving user experience.

[0014] In addition, the condensed water is weakly acidic and may contain impurities. The condensed water treatment unit first performs acid-base balance adjustment and impurity filtering on the condensed water, and then the condensed water pump sends the condensed water to the atomization shell for atomization and discharge, or sends it to the condensed water recovery pipe for recycling. This can reduce the corrosion effect of the condensed water on the atomization unit, the condensed water pump and the control valve group, and can also delay scaling on the surface of the atomization unit, the condensed water pump and the inside of the control valve group, reducing the probability of clogging the atomization unit, the condensed water pump and the control valve group.

[0015] In some embodiments, the control valve group includes a condensate recovery valve and an atomizing water supply valve, the outlet of the condensate pump is connected to the condensate recovery pipe through the condensate recovery valve, and the outlet of the condensate pump is connected to the atomizing housing through the atomizing water supply valve;

[0016] Alternatively, the control valve group includes a two-position three-way valve.

[0017] In some embodiments, a condensate recovery one-way valve is provided on the condensate recovery pipe;

[0018] And / or, the outlet of the control valve group is connected to the atomizing housing through an atomizing water supply pipe, and the atomizing water supply pipe is provided with an atomizing water supply one-way valve.

[0019] In some embodiments, the condensate water treatment shell is located below the condensation heat exchange shell, and the water outlet at the bottom of the condensation heat exchange shell is connected to the water inlet at the top of the condensate water treatment shell;

[0020] And / or, the condensing gas water heater also includes a liquid collecting shell located below the condensate water treatment shell, the water inlet at the top of the liquid collecting shell is connected to the water outlet at the bottom of the condensate water treatment shell, and the water outlet of the liquid collecting shell is connected to the inlet of the condensate pump.

[0021] In some embodiments, a first quick plug-in unit is disposed on the top of the liquid collection housing, and a second quick plug-in unit is disposed on the bottom of the condensate treatment housing, and the first quick plug-in unit and the second quick plug-in unit are plugged and fixed in a vertical direction.

[0022] In some embodiments, a disassembly opening is provided at the bottom of the condensate water treatment shell for allowing the condensate water treatment unit to enter and exit the condensate water treatment shell, and a cover is detachably connected to the condensate water treatment shell for opening and closing the disassembly opening.

[0023] In some embodiments, the upper end of the atomizing shell passes through the top of the condensing heat exchanging shell, and the lower end of the atomizing shell passes through the bottom of the condensing heat exchanging shell;

[0024] The condensing heat exchanger also includes a condensing heat exchange tube disposed in the condensing heat exchange shell, the condensing heat exchange tube is located between the smoke inlet and the atomizing shell in the horizontal direction, and the condensed water treatment shell is located directly below the condensing heat exchange tube.

[0025] In some embodiments, a smoke inlet hole is provided on the atomizing shell, the condensing heat exchange shell is connected with the atomizing shell through the smoke inlet hole, and a first acid-base neutralization filter element layer is provided at the inner bottom of the atomizing shell.

[0026] In some embodiments, the condensing gas water heater further comprises:

[0027] A fan, wherein an air outlet of the fan is connected to the smoke inlet;

[0028] The upper liquid level monitoring unit is used to detect whether the condensed water level in the condensing heat exchange shell has reached a preset limit level, and the preset limit level is lower than the minimum level that causes the condensed water in the condensing heat exchange shell to flow back to the fan outlet.

[0029] In some of the embodiments, the condensate treatment unit includes a porous buffer filter layer and a second acid-base neutralization filter layer disposed below the porous buffer filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0031] Figure 1 It is a schematic diagram of a condensing gas water heater provided by an embodiment of the utility model;

[0032] Figure 2 It is a partial schematic diagram of a condensing gas water heater provided by an embodiment of the utility model;

[0033] Figure 3 The structure of the condensing gas water heater provided by the embodiment of the utility model is Figure 1 ;

[0034] Figure 4 The structure of the condensing gas water heater provided by the embodiment of the utility model is Figure 2 .

[0035] In the figure:

[0036] 1. Condensate treatment component; 11. Condensate treatment housing; 12. Multi-porous buffer filter layer; 13. Second acid-base neutralization filter layer;

[0037] 2. Condensate atomization assembly; 20. Atomization water supply pipe; 21. Atomization housing; 22. Atomization unit; 23. Atomization lower liquid level monitoring unit; 24. Atomization trigger liquid level monitoring unit; 25. Upper liquid level monitoring unit; 26. First acid-base neutralization filter layer; 27. Anti-condensation pipe; 28. Smoke exhaust channel; 291. Atomization water supply valve; 292. Atomization water supply one-way valve;

[0038] 31. Liquid collecting shell; 32. Condensate pump; 331. Condensate recovery valve; 332. Condensate recovery check valve; 341. Minimum liquid level monitoring unit; 342. Maximum liquid level monitoring unit; 35. Pressure balance pipe; 36. Pressure detection unit; 371. Condensate recovery pipe; 372. Circulation pressure relief pipe; 38. Circulation pressure relief valve;

[0039] 4. Condensation heat exchanger; 41. Condensation heat exchange shell; 42. Condensation heat exchange tube;

[0040] 51. Liquid collecting electromagnetic drain valve; 52. Atomizing electromagnetic drain valve; 53. Manual drain valve; 54. Liquid collecting drain pipeline; 55. Atomizing drain pipeline;

[0041] 110. Fan; 120. Main heat exchanger; 130. Hot water outlet pipe; 140. Cold water inlet pipe; 150. Burner; 160. Gas inlet pipe; 170. Gas control valve; 180. Controller; 190. Smoke exhaust pipe. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] like Figures 1 to 4As shown, an embodiment of the utility model provides a condensing gas water heater, which includes a main heat exchanger 120, a burner 150 for heating water flowing in the main heat exchanger 120, a fan 110 for providing air to the burner 150, and a gas inlet pipe 160 connected to the gas inlet of the burner 150, a gas control valve 170 is provided on the gas inlet pipe 160, a hot water outlet of the main heat exchanger 120 is connected to a hot water outlet pipe 130, and a cold water inlet of the main heat exchanger 120 is connected to a cold water inlet pipe 140, cold water enters the main heat exchanger 120 through the cold water inlet pipe 140, the gas control valve 170 is opened, and the gas is sent to the burner 150 through the gas inlet pipe 160, and at the same time the fan 110 works to send air to the burner 150, the burner 150 works to heat the cold water flowing in the heat exchanger to form hot water, and the hot water flows out through the hot water outlet pipe 130. Exemplarily, the gas control valve 170 is a proportional valve for adjusting the gas flow.

[0047] The condensing gas water heater also includes a condensing heat exchanger 4, which includes a condensing heat exchange shell 41 and a condensing heat exchange tube 42. Both ends of the condensing heat exchange tube 42 pass through the condensing heat exchange shell 41, and the outlet end of the condensing heat exchange tube 42 is connected to the inlet end of the main heat exchanger 120. The outlet end of the condensing heat exchange tube 42 is connected to the cold water inlet pipe 140. The air outlet of the fan 110 is connected to the inner cavity of the condensing heat exchange shell 41, and the condensing heat exchange shell 41 is connected to the smoke exhaust pipe 190.

[0048] The high-temperature flue gas generated by combustion is cooled by the main heat exchanger 120 and then sent to the condensing heat exchange shell 41 through the fan 110. The low-temperature water enters the condensing heat exchange tube 42 through the cold water inlet pipe 140. The low-temperature water in the condensing heat exchange tube 42 exchanges heat with the hot flue gas in the condensing heat exchange shell 41. The heated water in the condensing heat exchange tube 42 enters the main heat exchanger 120 for further heating. After the flue gas in the condensing heat exchange shell 41 is cooled, it is discharged to the outside atmosphere through the exhaust pipe 190. By setting the condensing heat exchanger 4, the heat in the flue gas can be fully utilized to improve the heat exchange efficiency.

[0049] When the hot flue gas is condensed and cooled by the condensing heat exchanger 4, condensed water will be generated in the condensing heat exchange shell 41. When the condensed water level in the condensing heat exchange shell 41 is too high, the condensed water may overflow to the air outlet of the fan 110, thereby damaging other components of the condensing gas water heater.

[0050] To this end, the condensing gas water heater provided in the embodiment of the utility model also includes a condensed water treatment component 1, a condensed water atomization component 2, a condensed water pump 32, a condensed water recovery pipe 371 and a control valve group, wherein the condensing heat exchanger 4 includes a condensing heat exchange shell 41 provided with a smoke inlet and a smoke exhaust port, the condensed water treatment component 1 includes a condensed water treatment shell 11 connected to the condensed heat exchange shell 41, and a condensed water treatment unit provided in the condensed water treatment shell 11, and the condensed water treatment unit is used to perform acid-base balance and impurity filtering on the condensed water; the condensed water atomization component 2 The atomizing shell 21 includes an atomizing unit 22 disposed at the bottom of the atomizing shell 21. One end of the atomizing shell 21 is provided with a demisting port connected to the outside atmosphere. The atomizing unit 22 is used to atomize the condensed water in the atomizing shell 21. The inlet of the condensed water pump 32 is connected to the condensing heat exchange shell 41 through the condensed water treatment shell 11. The outlet of the condensed water pump 32 can be selectively connected to at least one of the inlets of the atomizing shell 21 and the condensed water recovery pipe 371 through the control valve group. The outlet of the condensed water recovery pipe 371 is connected to the water system of the condensing water heater. Exemplarily, the condensed water recovery pipe 371 is connected to the hot water outlet pipe 130.

[0051] The condensed water generated during the operation of the condensing heat exchanger 4 is collected at the bottom of the condensing water treatment shell 11. The condensed water collected at the bottom of the condensing heat exchange shell 41 enters the condensing water treatment shell 11, and the condensing water treatment unit performs acid-base balance and impurity filtration on the condensed water in the condensing water treatment shell 11. After that, the condensing water pump 32 can send the condensed water in the condensing water treatment shell 11 to the atomizing shell 21 by adjusting the state of the control valve group, and the atomizing unit 22 atomizes and discharges it to the outside atmosphere; the condensing water pump 32 can also recycle the condensed water in the condensing water treatment shell 11 through the condensing water recovery pipe 371. The condensing gas water heater has a condensing water atomizing discharge mode and a condensing water recycling mode. If any of the condensing water atomizing discharge mode and the condensing water recycling mode fails, the other mode can be enabled to achieve the purpose of timely discharging the condensed water in the condensing heat exchanger 4, avoiding excessive condensed water in the condensing heat exchanger 4 from flowing back through the smoke inlet, ensuring that the condensing gas water heater can work normally and improving user experience.

[0052] Since the condensed water sent into the atomizing housing 21 has been treated by the condensed water treatment unit, the atomizing unit 22 can be prevented from being immersed in untreated condensed water, thereby delaying scaling on the surface of the atomizing unit 22 and inside the condensed water pump 32 .

[0053] In addition, the condensed water is weakly acidic and may contain impurities. The condensed water treatment unit first adjusts the acid-base balance and filters the impurities in the condensed water. The condensed water pump 32 then sends the condensed water to the atomizing shell 21 for atomization and discharge, or sends it to the condensed water recovery pipe 371 for recycling. This can reduce the corrosion effect of the condensed water on the atomizing unit 22, the condensed water pump 32 and the control valve group, and can also delay scaling on the surface of the atomizing unit 22, the condensed water pump 32 and the inside of the control valve group, thereby reducing the probability of clogging the atomizing unit 22, the condensed water pump 32 and the control valve group.

[0054] In some embodiments, Figures 2 to 4 As shown, the control valve group includes a condensate recovery valve 331 and an atomizing water supply valve 291 , the outlet of the condensate pump 32 is connected to the condensate recovery pipe 371 through the condensate recovery valve 331 , and the outlet of the condensate pump 32 is connected to the atomizing shell 21 through the atomizing water supply valve 291 .

[0055] Exemplarily, the condensate recovery valve 331 and the atomizing water supply valve 291 are both electromagnetic stop valves, and both electromagnetic stop valves are electrically connected to the controller 180 of the condensing gas water heater. In other embodiments, the control valve group may also be a two-position three-way valve.

[0056] When the condensed water needs to be atomized and discharged, the condensed water recovery valve 331 is controlled to be closed, the atomizing water supply valve 291 is opened, and the condensed water pump 32 sends the condensed water treated by the condensed water treatment unit to the atomizing housing 21, and the atomizing unit 22 performs atomization and discharge. When the condensed water needs to be recycled, the condensed water recovery valve 331 is controlled to be opened, the atomizing water supply valve 291 is closed, and the condensed water pump 32 sends the condensed water treated by the condensed water treatment unit to the hot water outlet pipe 130 through the condensed water recovery pipe 371 for recycling. In addition, the condensed water recovery and the water supply of the atomizing housing 21 share a condensed water pump 32, the number of parts is small, and the integration of the condensing gas water heater is improved.

[0057] In some embodiments, Figures 2 to 4 As shown, a condensed water recovery check valve 332 is provided on the condensed water recovery pipe 371, and the outlet of the control valve group is connected to the atomizing housing 21 through the atomizing water supply pipe 20, and an atomizing water supply check valve 292 is provided on the atomizing water supply pipe 20. By providing the condensed water recovery check valve 332 and the atomizing water supply check valve 292, the condensed water can be effectively prevented from flowing back.

[0058] In some embodiments, the condensing gas water heater further includes a liquid collecting housing 31 located below the condensed water treatment housing 11, the water inlet at the top of the liquid collecting housing 31 is connected to the water outlet at the bottom of the condensed water treatment housing 11, and the water outlet of the liquid collecting housing 31 is connected to the inlet of the condensed water pump 32. The condensed water treatment housing 11 is located below the condensing heat exchange housing 41, and the water outlet at the bottom of the condensing heat exchange housing 41 is connected to the water inlet at the top of the condensed water treatment housing 11.

[0059] With such a configuration, the condensed water collected at the bottom of the condensation heat exchange shell 41 can automatically fall into the condensed water treatment shell 11 under the action of gravity, and be filtered and acid-base balanced by the condensed water treatment unit. The condensed water treated by the condensed water treatment unit will automatically fall into the liquid collection shell 31 under the action of gravity, and the liquid collection shell 31 will collect the condensed water. Then, the condensed water pump 32 will send the condensed water in the liquid collection shell 31 to the atomization shell 21 or the condensed water recovery pipe 371. No valves and pumps are required, the structure is simple, and the cost is low.

[0060] In some embodiments, a first quick-plug is provided at the top of the liquid collection housing 31, and a second quick-plug is provided at the bottom of the condensate treatment housing 11, and the first quick-plug and the second quick-plug are plugged and fixed in the vertical direction. The connection method is simple, and disassembly and assembly are convenient and fast. It should be noted that the liquid collection housing 31 and the condensate treatment housing 11 can also adopt other connection methods, such as snap connection, fastener connection, etc.

[0061] In some embodiments, a disassembly port is provided at the bottom of the condensate treatment housing 11 for the condensate treatment unit to enter and exit the condensate treatment housing 11, and a cover is detachably connected to the condensate treatment housing 11 for opening and closing the disassembly port. When the condensate treatment unit needs to be replaced, the liquid collection housing 31 can be removed, and then the plugging cover can be removed to take out the condensate treatment unit in the condensate treatment housing 11. It should be noted that the detachable connection between the condensate treatment housing 11 and the plugging cover can be a fastener connection, a snap connection, etc.

[0062] In some embodiments, Figure 2As shown, the condensate treatment unit includes a porous buffer filter layer 12, and a second acid-base neutralization filter layer 13 disposed below the porous buffer filter layer 12. The porous buffer filter layer 12 can not only buffer and insulate the condensate that has just entered the condensate treatment housing 11, but also filter the impurities of the falling condensate to prevent the condensate containing impurities from flowing through the condensate pump 32, the atomization unit 22 and the control valve group and being blocked; the condensate gradually passes through the second acid-base neutralization filter layer 13 from top to bottom, so that the condensate is fully infiltrated and contacted with the second acid-base neutralization filter layer 13, so as to achieve the purpose of fully neutralizing the condensate with acid, and can prevent the acidic condensate from directly flowing through the condensate pump 32, the atomization unit 22 and the control valve group and shortening the service life. In other embodiments, the second acid-base neutralization filter layer 13 can also be disposed above the porous buffer filter layer 12.

[0063] Exemplarily, one layer of porous buffer filter core layer 12 is provided, and the porous buffer filter core layer 12 is a sponge. In other embodiments, when the porous buffer filter core layer 12 can also be provided with at least two layers, at least two layers of porous buffer filter core layers 12 are stacked in the vertical direction, and in the two adjacent layers of porous buffer filter core layers 12, the filtering accuracy of the lower porous buffer filter core layer 12 is higher than the filtering accuracy of the upper porous buffer filter core layer 12. Such a setting can improve the filtering accuracy of condensed water and prevent the condensed water from containing impurities and clogging the condensed water pump 32.

[0064] It should be noted that the condensate treatment unit can also use an integrated filter element in the prior art that can both perform acid-base balance and filter impurities, which will not be described in detail here.

[0065] In some embodiments, Figures 2 to 4 As shown, the condensing gas water heater further includes a pressure balance pipe 35, one end of which is connected to the top of the liquid collecting shell 31 and communicates with the top inner cavity of the liquid collecting shell 31, and the other end of which extends upward and is provided with an atmospheric communication port connected to the outside atmosphere, and the atmospheric communication port is higher than the air outlet of the fan 110. Exemplarily, the top opening of the pressure balance pipe 35 forms an atmospheric communication port, and the atmospheric communication port is not lower than the highest point of the condensing heat exchange shell 41.

[0066] The top inner cavity of the liquid collecting shell 31 is connected to the outside atmosphere through the pressure balance pipe 35. In the process that the condensed water in the upper condensate treatment shell 11 falls into the lower liquid collecting shell 31, the internal and external pressures of the liquid collecting shell 31 are balanced. Moreover, since the atmospheric connection port is higher than the air outlet of the fan 110, and the condensed water in the condensing heat exchange shell 41 generally does not exceed the air outlet of the fan 110, it can effectively prevent the condensed water from overflowing through the atmospheric connection port at the top of the pressure balance pipe 35.

[0067] During the operation of the condensate pump 32, if the condensate recovery pipe 371 is blocked, the discharge pressure of the condensate pump 32 may increase sharply and damage the condensate pump 32. For this reason, in some embodiments, a pressure detection unit 36 ​​is provided at the outlet of the condensate pump 32, and the pressure detection unit 36 ​​is used to detect the discharge pressure of the condensate pump 32; the outlet of the condensate pump 32 is connected to a circulating pressure relief pipe 372, and the water outlet end of the circulating pressure relief pipe 372 is connected to the top inner cavity of the liquid collecting shell 31; the circulating pressure relief valve 38 is provided on the circulating pressure relief pipe 372.

[0068] When the pressure detection unit 36 ​​detects that the discharge pressure of the condensate pump 32 increases sharply, the circulating pressure relief valve 38 is opened, so that the liquid collecting shell 31, the condensate pump 32 and the circulating pressure relief pipe 372 form a circulating water circuit for circulating the condensate, thereby relieving the pressure of the condensate pump 32 and ensuring the safe operation of the condensate pump 32.

[0069] In some embodiments, Figures 2 to 4 As shown, the water outlet end of the circulating pressure relief pipe 372 is connected to the liquid collecting shell 31 through the pressure balance pipe 35; the water outlet end of the circulating pressure relief pipe 372 is tilted downward along its own water outlet direction, and the water outlet end of the circulating pressure relief pipe 372 is connected to the pressure balance pipe 35 to form a Y-shaped connecting pipe.

[0070] When the circulating pressure relief valve 38 is opened, the condensed water in the circulating pressure relief pipe 372 is inclined downward along the water outlet end of the circulating pressure relief pipe 372 and introduced into the pressure balance pipe 35, and enters the liquid collecting shell 31 through the pressure balance pipe 35, thereby preventing the condensed water from rushing upward along the pressure balance pipe 35.

[0071] In some embodiments, Figure 1 and Figure 2 As shown, the upper end of the atomizing shell 21 passes through the top of the condensing heat exchanging shell 41, and the lower end of the atomizing shell 21 passes through the bottom of the condensing heat exchanging shell 41. The hot flue gas in the condensing heat exchanging shell 41 is used to keep the atomizing shell 21 warm, which can effectively prevent the water mist formed after atomization from condensing.

[0072] In some embodiments, Figure 1 and Figure 2 As shown, the condensing heat exchanger 4 also includes a condensing heat exchange tube 42 disposed in the condensing heat exchange shell 41, and the condensing heat exchange tube 42 is located between the smoke inlet and the atomizing shell 21 in the horizontal direction, and the condensed water treatment shell 11 is located directly below the condensing heat exchange tube 42. The high-temperature flue gas entering the condensing heat exchange shell 41 will first exchange heat with the water flowing in the condensing heat exchange tube 42 for cooling, and then flow through the atomizing shell 21 and be discharged through the smoke exhaust port. This arrangement can also improve the integration of the condensing gas water heater and make full use of the space around the condensing heat exchanger 4.

[0073] In some embodiments, Figure 1 and Figure 2 As shown, a smoke inlet hole is provided on the atomizing shell 21, and the condensing heat exchange shell 41 is connected to the atomizing shell 21 through the smoke inlet hole. A part of the smoke enters the atomizing shell 21 through the smoke inlet hole, and the water mist in the atomizing shell 21 is heated to prevent the water mist formed by atomization from condensing, thereby enhancing the demisting effect.

[0074] Since a small amount of smoke entering the atomizing housing 21 may dissolve in the condensed water at the bottom of the atomizing housing 21, causing the condensed water to be acidic and shortening the service life of the atomizing unit 22, in some embodiments, a first acid-base neutralization filter layer 26 is provided at the inner bottom of the atomizing housing 21. The first acid-base neutralization filter layer 26 is used to adjust the acid-base balance of the condensed water in the atomizing housing 21 in real time, thereby creating good neutral atomized water quality for the atomizing unit 22.

[0075] Exemplarily, the atomization unit 22 is laid on the inner bottom wall of the atomization housing 21 , and the first acid-base neutralization filter element layer 26 is disposed outside the atomization unit 22 .

[0076] In some embodiments, Figure 1 and Figure 2 As shown, the condensation atomization assembly also includes an anti-condensation tube 27, the lower end of the anti-condensation tube 27 is located in the condensation atomization shell 21, the upper end of the anti-condensation tube 27 passes through the smoke exhaust port from the top of the condensation heat exchange shell 41, the anti-condensation tube 27 is sleeved outside the atomization shell 21, and a smoke exhaust channel 28 is formed between the anti-condensation tube 27 and the atomization shell 21, the lower end of the smoke exhaust channel 28 is connected to the condensation atomization shell 21, and the upper end of the smoke exhaust channel 28 is connected to the outside atmosphere.

[0077] Specifically, both axial ends of the anti-condensation tube 27 are open, the lower end of the anti-condensation tube 27 is spaced above the inner bottom wall of the condensation atomization shell 21, and the upper end of the anti-condensation tube 27 passes through the top of the condensation atomization shell 21 and is open.

[0078] The water mist generated by the atomization unit 22 is discharged through the mist exhaust port on the top of the atomization shell 21, and a part of the high-temperature flue gas in the condensation heat exchange shell 41 is discharged into the outside atmosphere through the smoke exhaust channel 28. This part of the flue gas has the function of keeping the atomization shell 21 warm to reduce the probability of water mist condensation in the atomization shell 21. The other part enters the atomization shell 21 through the smoke inlet hole, is directly mixed with the water mist and then discharged into the outside atmosphere to heat the water mist and further reduce the probability of water mist condensation.

[0079] Exemplarily, the atomizing shell 21 and the anti-condensation tube 27 are both cylindrical structures and are coaxially arranged. The anti-condensation tube 27 is sleeved outside the atomizing shell 21. The inner diameter of the anti-condensation tube 27 is larger than the outer diameter of the upper shell, so that a smoke exhaust channel 28 is formed between the atomizing shell 21 and the anti-condensation tube 27.

[0080] Exemplarily, the anti-condensation pipe 27 and the condensation heat exchange housing 41 are integrally formed, and the upper end of the atomization housing 21 is fixed to the anti-condensation pipe 27. The anti-condensation pipe 27 passes through the smoke exhaust port at the top of the condensation heat exchange housing 41 and is connected to the smoke exhaust pipe 190. The smoke exhaust pipe 190 and the anti-condensation pipe 27 are connected to form a bend greater than or equal to 90 degrees. Such a configuration can improve the integration of the condensing gas water heater and improve the space utilization rate.

[0081] Since the smoke inlet hole on the atomizing shell 21 connects the condensing heat exchange shell 41 and the atomizing shell 21, when the condensed water level in the condensing heat exchange shell 41 is high, the condensed water that has not been treated by the condensed water treatment unit will directly enter the atomizing shell 21 through the smoke inlet hole, and may also flow back to the air outlet of the fan 110 in the gas water heater. To this end, in some embodiments, the condensing gas water heater also includes an upper liquid level monitoring unit 25, which is used to detect whether the condensed water level in the condensing heat exchange shell 41 has reached a preset limit liquid level, which is lower than the minimum liquid level that causes the condensed water in the condensing heat exchange shell 41 to flow back to the air outlet of the fan 110.

[0082] When the liquid level in the condensing heat exchange shell 41 reaches the preset limit level, when the condensing gas water heater operates in the condensing water recovery mode, the power of the condensing water pump 32 is increased; when the condensing gas water heater operates in the condensing water discharge mode, the power of the condensing water pump 32 and the atomizing unit 22 are increased at the same time to increase the condensing water discharge speed in the condensing heat exchange shell 41 and prevent the condensing water in the condensing heat exchange shell 41 from flowing back through the smoke inlet.

[0083] In some embodiments, the smoke inlet is higher than a preset limit liquid level, so as to prevent condensed water in the condensation heat exchange housing 41 from entering the atomization housing 21 through the smoke inlet.

[0084] In some embodiments, Figure 1 and Figure 2 As shown, the condensing gas water heater also includes an atomization lower liquid level monitoring unit 23 and an atomization triggering liquid level monitoring unit 24, wherein the atomization lower liquid level monitoring unit 23 is used to monitor whether the liquid level in the atomization shell 21 reaches a preset minimum allowable atomization liquid level; the atomization triggering liquid level monitoring unit 24 is used to monitor whether the liquid level in the atomization shell 21 reaches a preset atomization triggering liquid level; the preset limit liquid level height>the preset atomization trigger liquid level height>the preset minimum allowable atomization liquid level height.

[0085] For ease of description, the actual liquid level in the atomizing housing 21 is denoted as H i , the preset minimum atomization liquid level is recorded as H1, the preset limit liquid level is recorded as H2, the preset atomization trigger liquid level is recorded as H3, H2>H3>H1.

[0086] When the condensing gas water heater operates in the condensed water atomization discharge mode, the atomization water supply valve 291 is opened and the condensed water recovery valve 331 is closed.

[0087] If H i

[0088] If H1≤H i ≤H2, indicating that the liquid level in the atomizing housing 21 meets the liquid level requirement for the normal operation of the atomizing unit 22, the atomizing unit 22 is controlled to enter the standby state, and the liquid level H in the atomizing housing 21 is monitored in real time. i The height changes and i ≥H3, the atomizing unit 22 and the condensate pump 32 are controlled to start; otherwise, the liquid level H in the atomizing housing 21 is continuously monitored. i height changes.

[0089] If H i >H2, indicating that the liquid level in the atomizing shell 21 is higher than the highest liquid level of the atomizing unit 22 for normal operation. The condensed water in the condensing heat exchanger 4 may flow back to the air outlet of the fan 110, thereby damaging other parts of the condensing gas water heater. The reason for the excessively high condensed water level in the condensing heat exchanger 4 may be the slow atomization speed or the failure of the atomizing unit 22. At this time, the atomizing unit 22 enters the atomizing water level risk warning state, controls the atomizing unit 22 to work continuously at the maximum atomizing power for the atomizing risk clearance time T1, and monitors the water level in the atomizing shell 21 in real time. When the atomizing risk clearance time T1 is reached, if the liquid level H in the atomizing shell 21 i If the liquid level H in the atomizing housing 21 is still greater than H2, it indicates that the atomizing unit 22 is faulty, and the condensate recovery valve 331 is automatically opened and the atomizing water supply valve 291 is closed to recover the condensate, and at the same time, an alarm prompt for a fault in the condensate atomizing component 2 is issued; when the atomization risk clearance time T1 is reached, if the liquid level H in the atomizing housing 21 is i ≤H2, continue to control the atomization unit 22 to work.

[0090] During the normal operation of the atomizing unit 22, if the liquid level in the atomizing housing 21 continues to rise to H i ​>H2, it means that the atomization unit 22 has aged and the atomization efficiency has decreased. The atomization unit 22 is controlled to work continuously at the maximum atomization power for the atomization risk clearance time T2. When the atomization risk clearance time T2 is reached, if the liquid level Hi in the atomization housing 21 is still greater than H2, it means that the atomization unit 22 is faulty. The condensate recovery valve 331 is automatically opened and the atomization water supply valve 291 is closed to recover the condensate. At the same time, a condensate atomization component 2 fault alarm is issued. When the atomization risk clearance time T1 is reached, if the liquid level H in the atomization housing 21 is i ≤H2, it may be that the power of the atomizing unit 22 is too low, causing the atomizing unit 22 to fail to atomize the condensed water produced by the condensing heat exchanger 4 in time, resulting in an increase in the condensed water level in the condensing heat exchanger 4. After that, the atomizing unit 22 can be controlled to continue working at the maximum atomizing power.

[0091] It should be noted that the upper liquid level monitoring unit 25, the atomization lower liquid level monitoring unit 23 and the atomization triggering liquid level monitoring unit 24 can all adopt liquid level detection components for measuring liquid level in the prior art such as liquid level probes and liquid level sensors, which are not listed one by one here.

[0092] In some embodiments, Figure 1 and Figure 2 As shown, the condensing gas water heater also includes a minimum liquid level monitoring unit 341 and a maximum liquid level monitoring unit 342, wherein the minimum liquid level monitoring unit 341 is used to monitor whether the liquid level in the liquid collecting shell 31 is lower than a preset minimum recovery liquid level; the maximum liquid level monitoring unit 342 is used to monitor whether the liquid level in the liquid collecting shell 31 is not lower than a preset maximum recovery liquid level, and the preset limit liquid level height is greater than the preset maximum recovery liquid level height> the preset minimum recovery liquid level height.

[0093] For the convenience of description, the actual liquid level in the liquid collecting housing 31 is denoted as H ii , the lowest liquid level monitoring unit 341 is recorded as H4, the highest liquid level monitoring unit 342 is recorded as H5, H2>H5>H4.

[0094] When the condensing gas water heater operates in the condensed water recovery mode, the atomizing water supply valve 291 is closed and the condensed water recovery valve 331 is opened.

[0095] If H ii <H4, indicating that the liquid level in the liquid collecting housing 31 is lower than the minimum liquid level for normal operation, and the condensate pump 32 enters a shutdown or standby state to prevent the condensate pump 32 from idling. The liquid level in the liquid collecting housing 31 is monitored in real time, and when the liquid level in the liquid collecting housing 31 reaches H5, the condensate pump 32 is controlled to start.

[0096] If H4≤H ii<H5, indicating that the liquid level in the liquid collecting housing 31 meets the liquid level requirement for normal operation. When the liquid level in the liquid collecting housing 31 rises to not less than H5, the condensate pump 32 is controlled to start; and the drainage pressure of the condensate pump 32 is monitored in real time. i When the pressure is not less than the preset maximum drainage pressure P0, the circulating pressure relief valve 38 is controlled to connect the outlet of the condensate pump 32 and the top inner cavity of the liquid collecting shell 31.

[0097] If H ii ≥H5, will trigger H ii The main reason for ≥H5 may be that the condensate recovery valve 331 leaked when the condensate atomization mode was previously executed, or that rainwater flowed back into the condensate heat exchange shell 41 through the smoke exhaust pipe 190 before the condensate gas water heater was turned on, and the condensate recovery valve 331 leaked. At this time, the condensate pump 32 is controlled to operate at the maximum recovery power to recycle the condensate as soon as possible to achieve the purpose of reducing the liquid level in the condensate heat exchange shell 41, and to avoid the situation where the condensate gas water heater starts to work and new condensate is generated in the condensate heat exchange shell 41, causing the liquid level in the condensate heat exchange shell 41 to further rise and the condensate to flow back to the air outlet of the fan 110.

[0098] In the process of controlling the condensate pump 32 to operate at the maximum recovery power, the discharge pressure of the condensate pump 32 is monitored in real time. When the discharge pressure of the condensate pump 32 is not less than the preset maximum discharge pressure, the circulating pressure relief valve 38 is controlled to connect the outlet of the condensate pump 32 and the top inner cavity of the liquid collecting shell 31 to relieve the pressure of the condensate pump 32.

[0099] When the duration of continuous operation of the condensate pump 32 at the maximum recovery power reaches the first recovery risk clearance duration, if H ii ≥H2, and / or the discharge pressure P of the condensate pump 32 i ≥The preset maximum drainage pressure P0 indicates that the condensate recovery mode fails. The condensate recovery pipe 371 may be blocked, resulting in an increase in the drainage pressure of the condensate pump 32. The condensate pump 32 is unable to reduce the liquid level in the condensing heat exchange shell 41 in time. If the condensing gas water heater continues to work, the liquid level in the condensing heat exchange shell 41 may further increase, causing the condensate to flow back to the air outlet of the fan 110.

[0100] When the condensate pump 32 continuously operates at the maximum recovery power for a period of time equal to or before the first recovery risk clearance period, if H ii <H5, indicating that the water heater fault is cleared successfully, and at this time the condensate pump 32 can be controlled to continue working.

[0101] The condensate recycling mode enters the recycling water level risk warning state, and the pressure detection unit 36 ​​detects the drainage pressure P of the condensate pump 32. i , if P i ≥P0, P0 is the preset maximum drainage pressure when the condensate pump 32 is working normally, and the circulating pressure relief valve 38 is opened to relieve the pressure of the condensate pump 32; at the same time, the condensate pump 32 is controlled to continuously recover the risk removal time T2 at the maximum power, and the liquid level H in the liquid collecting shell 31 is monitored in real time ii When the recovery risk clearance time T2 is reached, if the liquid level H in the liquid collecting housing 31 ii If the level is still greater than H5, it means that the condensate recovery pipe 371 is blocked and the condensate atomization discharge mode is automatically switched to perform condensate atomization discharge, and a condensate recovery mode fault alarm is issued. If the liquid level in the liquid collection housing 31 drops to H5 before the recovery risk clearance time T2 is reached, ii ≤H5, it means that the power of the condensate pump 32 may be too low, which causes the condensate pump 32 to be unable to discharge the condensate generated by the condensation heat exchanger 4 in time, resulting in an increase in the condensate level in the condensation heat exchanger 4.

[0102] It should be noted that the minimum liquid level monitoring unit 341 and the maximum liquid level monitoring unit 342 may adopt liquid level detection components for measuring liquid level in the prior art, such as liquid level probes and liquid level sensors, which are not listed one by one here.

[0103] In some embodiments, Figure 2 and Figure 4 As shown, a liquid collecting drain port is provided at the bottom of the liquid collecting housing 31, and a liquid collecting drain valve is connected to the liquid collecting drain port; an atomizing drain port is provided at the bottom of the atomizing housing 21, and an atomizing drain valve is provided at the atomizing drain port.

[0104] It should be noted that there are two types of liquid collecting drain valve and atomizing drain valve, one is a manual drain valve 53 and the other is an electromagnetic drain valve.

[0105] Exemplarily, the atomizing sewage outlet and the liquid collecting sewage outlet are each connected to an electromagnetic sewage valve, and the two electromagnetic sewage valves are respectively recorded as the atomizing electromagnetic sewage valve 52 and the liquid collecting electromagnetic sewage valve 51. The atomizing sewage outlet is connected to the atomizing electromagnetic sewage valve 52 through the atomizing sewage pipeline 55, and the liquid collecting sewage outlet is connected to the liquid collecting electromagnetic sewage valve 51 through the liquid collecting sewage pipeline 54. The atomizing sewage pipeline 55 and the liquid collecting sewage pipeline 54 are jointly connected to a manual sewage valve 53.

[0106] When the condensed water atomization discharge mode fails, the atomization electromagnetic drain valve 52 can be started for emergency discharge of condensed water; when the condensed water recycling mode fails, the liquid collection electromagnetic drain valve 51 can be started for emergency discharge of condensed water. When both the atomization electromagnetic drain valve 52 and the liquid collection electromagnetic drain valve 51 fail, the manual drain valve 53 is opened to discharge the condensed water.

[0107] When the condensing gas water heater is started, a power-on self-check is performed to determine whether the condensing gas water heater is faulty. If a fault occurs, the condensing gas water heater is controlled to shut down, and a corresponding fault alarm is displayed on the display of the condensing gas water heater to remind the user to repair it in time to eliminate the fault.

[0108] After the power-on self-test is normal, wait for the preset time. If the user's processing mode instruction is not received within the preset time, execute the last executed processing mode to process the condensed water. If the user's processing mode instruction is received, execute the processing mode selected by the user to process the condensed water, and run the power-on self-test at the same time. When the condensing gas water heater switches between the condensed water atomization discharge mode and the condensed water recycling mode, the condensing gas water heater will self-check whether the corresponding processing mode is normal and can automatically identify the fault. If any processing mode fails, it can automatically switch to another processing mode while reminding the user, alleviating the gas water heater shutdown problem caused by the condensed water treatment failure, and improving the reliability of the condensing gas water heater.

[0109] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A condensing gas water heater, characterized in that: include: A condensing heat exchanger (4), comprising a condensing heat exchange shell (41), wherein the condensing heat exchange shell (41) is provided with a smoke inlet and a smoke exhaust port; A condensate treatment assembly (1), comprising a condensate treatment shell (11) connected to the condensation heat exchange shell (41), and a condensate treatment unit arranged in the condensate treatment shell (11), wherein the condensate treatment unit is used to adjust the acid-base balance and filter impurities of the condensate; A condensed water atomization assembly (2), comprising an atomization shell (21), and an atomization unit (22) arranged at the bottom of the atomization shell (21), one end of the atomization shell (21) being provided with a mist outlet connected to the outside atmosphere, and the atomization unit (22) being used to atomize the condensed water in the atomization shell (21); A condensate pump (32), wherein the inlet of the condensate pump (32) is connected to the condensation heat exchange shell (41) through the condensate treatment shell (11); Condensate recovery pipe (371), the outlet of the condensate pump (32) can be selectively connected to at least one of the inlets of the atomizing shell (21) and the condensate recovery pipe (371) through a control valve group; the outlet of the condensate recovery pipe is connected to the water system of the condensing water heater.

2. The condensing gas water heater according to claim 1, characterized in that: The control valve group comprises a condensate recovery valve (331) and an atomizing water supply valve (291); the outlet of the condensate pump (32) is connected to the condensate recovery pipe (371) through the condensate recovery valve (331); and the outlet of the condensate pump (32) is connected to the atomizing housing (21) through the atomizing water supply valve (291); Alternatively, the control valve group includes a two-position three-way valve.

3. The condensing gas water heater according to claim 1, characterized in that: The condensed water recovery pipe (371) is provided with a condensed water recovery check valve (332); And / or, the outlet of the control valve group is connected to the atomizing housing (21) via an atomizing water supply pipe (20), and an atomizing water supply one-way valve (292) is provided on the atomizing water supply pipe (20).

4. The condensing gas water heater according to claim 1, characterized in that: The condensate treatment shell (11) is located below the condensate heat exchange shell (41), and the water outlet at the bottom of the condensate heat exchange shell (41) is connected to the water inlet at the top of the condensate treatment shell (11); And / or, the condensing gas water heater also includes a liquid collecting shell (31) located below the condensed water treatment shell (11), the water inlet at the top of the liquid collecting shell (31) is connected to the water outlet at the bottom of the condensed water treatment shell (11), and the water outlet of the liquid collecting shell (31) is connected to the inlet of the condensed water pump (32).

5. The condensing gas water heater according to claim 4, characterized in that: A first quick-plug component is provided on the top of the liquid collection housing (31), and a second quick-plug component is provided on the bottom of the condensate treatment housing (11), wherein the first quick-plug component and the second quick-plug component are plugged and fixed in a vertical direction.

6. The condensing gas water heater according to claim 4, characterized in that: The bottom of the condensate treatment shell (11) is provided with a disassembly opening for allowing the condensate treatment unit to enter and exit the condensate treatment shell (11); the condensate treatment shell (11) is detachably connected with a cover for opening and closing the disassembly opening.

7. The condensing gas water heater according to claim 4, characterized in that: The upper end of the atomizing shell (21) passes through the top of the condensing heat exchanging shell (41), and the lower end of the atomizing shell (21) passes through the bottom of the condensing heat exchanging shell (41); The condensing heat exchanger (4) also includes a condensing heat exchange tube (42) arranged in the condensing heat exchange shell (41), and the condensing heat exchange tube (42) is located between the smoke inlet and the atomizing shell (21) in the horizontal direction, and the condensing water treatment shell (11) is located directly below the condensing heat exchange tube (42).

8. The condensing gas water heater according to claim 4, characterized in that: The atomizing shell (21) is provided with a smoke inlet hole, the condensing heat exchange shell (41) is connected to the atomizing shell (21) through the smoke inlet hole, and the inner bottom of the atomizing shell (21) is provided with a first acid-base neutralization filter element layer (26).

9. The condensing gas water heater according to claim 1, characterized in that: Also includes: A fan (110), wherein an air outlet of the fan (110) is connected to the smoke inlet; An upper liquid level monitoring unit (25) is used to detect whether the condensate water level in the condensate heat exchange shell (41) reaches a preset limit level, wherein the preset limit level is lower than the minimum level at which the condensate water in the condensate heat exchange shell (41) flows back to the air outlet of the fan (110).

10. The condensing gas water heater according to claim 1, characterized in that: The condensate water treatment unit comprises a porous buffer filter core layer (12) and a second acid-base neutralization filter core layer (13) arranged below the porous buffer filter core layer (12).

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