Condensate water recovery processing device and gas water heater

Abstract

The gas water heater comprises a water inlet pipe, a water outlet pipe, a heating device and the condensate water recovery treatment device, the condensate water recovery treatment device comprises a heat exchange module, a purification module and a drainage water pump, the heat exchange module comprises a heat exchange shell, and the heat exchange shell is provided with a heat exchange cavity; the purification module comprises a purification shell, a filter element assembly and a sealing cover, the purification shell is provided with a purification cavity communicating with the heat exchange cavity, the filter element assembly is arranged in the purification cavity, the purification cavity communicates with the water outlet pipe through a drainage water pump, and the sealing cover detachably blocks an opening of the purification shell. When the heating device is used for heating, condensate water generated by smoke condensation can be recovered and treated by the condensate water recovery treatment device and then flows out of the water outlet pipe after being converged with hot water heated by the heating device, so that an external drain pipe is not needed, the condensate water is recycled, and the trouble of discharging the condensate water is solved; and the filter element assembly can be conveniently replaced after being used for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a condensed water recovery and treatment device and a gas water heater. Background Art

[0002] Gas water heaters use gas as energy and transfer heat to cold water flowing through a heat exchanger to prepare hot water. They are popular among users for their energy-saving and easy-to-use advantages. Among them, condensing gas water heaters are a common type of gas water heater. The principle is to use a condensing heat exchange device for secondary heat exchange, preheat the water, and recover the latent heat of the medium-temperature flue gas, thereby improving the utilization rate of gas and greatly reducing the temperature of the flue gas discharged from the machine. However, the water vapor in the medium-temperature flue gas will condense into liquid condensed water while releasing the latent heat, and the CO2 and NO in the flue gas will also condense into liquid condensed water. X Acidic gases such as chlorine and chlorine will dissolve in condensed water, making it corrosive. Therefore, it is necessary to equip an independent drainage pipe to discharge the condensed water, and before discharge, the condensed water recovery and treatment device should be used to neutralize the pH to remove the corrosiveness of the condensed water.

[0003] However, due to the limitations of the installation location and environment of the existing condensing gas water heaters, it is sometimes inconvenient to connect the condensate discharge pipe to the sewer, and the drainage pipe occupies a large space, which also affects the normal installation and use of the condensing gas water heater. Therefore, a condensing gas water heater has appeared on the market, which is provided with a condensate recovery and treatment device, which recovers and treats the condensate and then injects it into the water system of the gas water heater for secondary use, avoiding the direct discharge of the condensate and causing waste of water resources. However, the existing condensate recovery and treatment device has a relatively complex structure, and the filter element inside it for neutralizing the pH of the condensate needs to be disassembled and replaced to avoid failure of the filter element after long-term use. The operation is relatively cumbersome, which affects the user experience when using the gas water heater. Utility Model Content

[0004] Based on this, it is necessary to provide a condensate recovery and treatment device and a gas water heater including the condensate recovery and treatment device to address the series of problems mentioned above, so as to facilitate the recovery and treatment of the condensate and facilitate users to replace the filter element in the condensate recovery and treatment device.

[0005] A condensed water recovery and treatment device, comprising:

[0006] A heat exchange module comprises a heat exchange shell and an auxiliary heat exchanger, wherein the heat exchange shell has a heat exchange cavity;

[0007] The purification module comprises a purification housing, a filter element assembly and a cover, wherein the purification housing is connected to the outer wall of the heat exchange housing, the purification housing has a purification cavity connected to the heat exchange cavity, a filter element assembly is arranged in the purification cavity, the filter element assembly is used to purify condensed water flowing from the heat exchange cavity into the purification cavity, the purification housing is provided with an opening for disassembling and installing the filter element assembly; the cover detachably blocks the opening of the purification housing;

[0008] A drainage water pump, wherein the water inlet end of the drainage water pump is connected to the purification chamber, and the water outlet end of the drainage water pump is connected to the water system of the gas water heater, and is used to inject the condensed water into the water system of the gas water heater.

[0009] The above-mentioned condensed water recovery and treatment device has a simple structure by connecting the purification shell to the outer wall of the heat exchange shell and providing a filter element assembly in the purification cavity inside the purification shell. The filter element assembly can be used to purify the condensed water flowing from the heat exchange cavity of the heat exchange shell into the purification cavity, and the water outlet end of the drainage water pump is connected to the purification cavity, and the water outlet end of the drainage water pump is connected to the water system of the gas water heater, so that the condensed water can be recycled; at the same time, a cover is provided in the purification module, and the purification shell is provided with an opening for disassembling and assembling the filter element assembly. The cover can detachably block the opening of the purification shell, so that the filter element assembly can be easily replaced after long-term use, thereby improving the user experience.

[0010] In one of the embodiments, the sealing cover is threadedly connected to the purification shell to seal the opening of the purification shell; or, the sealing cover is sleeved on the outer periphery of the opening of the purification shell and is interference fit with the purification shell to seal the opening of the purification shell; or, the sealing cover is inserted into the opening of the purification shell and is interference fit with the purification shell to seal the opening of the purification shell.

[0011] In one embodiment, the filter element assembly includes a filter element and a neutralization filter element, and the filter element and the neutralization filter element are sequentially stacked in the purification chamber along the flow direction of the condensed water;

[0012] Alternatively, the purification chamber includes a first chamber and a second chamber that are interconnected, and the first chamber is connected to the heat exchange chamber; the filter element assembly includes a neutralization filter element arranged in the first chamber and a filtering filter element arranged in the second chamber.

[0013] By arranging a first filter element in the purification cavity of the purification module, when the condensed water flows from the heat exchange module into the purification module, the first filter element can neutralize the pH of the condensed water, changing the condensed water from acidic to neutral or weakly acidic, and filter and purify the condensed water, thereby ensuring that the water quality of the recovered condensed water is good and can be recycled later.

[0014] In one of the embodiments, the condensate water recovery and treatment device also includes a liquid collection module, the liquid collection module includes a liquid collection shell, the liquid collection shell has a liquid collection cavity connected to the purification cavity; the outer wall of the purification shell has a connecting portion, the outer wall of the liquid collection shell is provided with a connecting groove, and the connecting portion is inserted into the connecting groove.

[0015] By setting up a liquid collection module, the condensed water purified by the purification module can be stored in the liquid collection cavity of the liquid collection module, so as to facilitate the subsequent recycling of the condensed water; at the same time, by setting a connecting part on the outer wall of the purification shell, and by opening a connecting groove on the outer wall of the liquid collection shell, when the connecting part is inserted into the connecting groove, the purification module and the liquid collection module can be connected to each other.

[0016] In one of the embodiments, the outer circumference of the connecting part is sleeved with a claw, the outer circumference of the claw is provided with a slot, the inner circumference of the connecting slot has a snap ring, and the snap ring is snapped into the slot, so that the connecting part is fixedly inserted into the connecting slot through the claw.

[0017] By sleeved claws on the outer peripheral surface of the connection part of the purification shell, the connection part is fixedly inserted into the connection groove opened on the liquid collection shell through the claws, so that the purification module and the liquid collection module can be firmly connected without being separated from each other, thereby enhancing the reliability of the connection between the two.

[0018] In one of the embodiments, the liquid collection module also includes a pressure balancing pipe and a circulating pressure relief pipe; the liquid collection shell is provided with a drain port and a pressure relief port connected to the liquid collection cavity; the drain port is connected to the water inlet end of the drainage pump; one end of the pressure balancing pipe is connected to the pressure relief port, and the other end is connected to the external environment and is located above the liquid collection module and the purification module; one end of the circulating pressure relief pipe is connected to the drain port, and the other end is connected to the pressure balancing pipe.

[0019] By arranging a pressure balancing pipe in the condensed water recovery and treatment device and connecting the pressure balancing pipe to the pressure discharge port of the liquid collecting shell, the internal and external pressures in the liquid collecting cavity can be balanced, thereby ensuring that the condensed water can flow smoothly from the purification cavity of the purification module into the liquid collecting cavity of the liquid collecting module.

[0020] At the same time, by setting one end of the pressure balancing tube above the liquid collecting module and the purification module, it can prevent condensed water from overflowing from the pipe mouth of the pressure balancing tube due to excessive pressure in the process of being discharged from the bottom of the purification module to the liquid collecting module, thereby preventing the condensed liquid from damaging the components inside the gas water heater or causing a short circuit in the electronic components.

[0021] Furthermore, since the drainage pump connected to the liquid collecting module will generate a large water pressure during operation, when the condensed water in the liquid collecting module is blocked from being discharged from the drain port, a circulating pressure relief pipe is provided in the condensed water recovery and treatment device, with one end of the circulating pressure relief pipe connected to the drain port of the liquid collecting shell, and the other end connected to the pressure balance pipe, a circulating pipeline can be formed to release the pressure, thereby avoiding damage to the drainage pump due to a sharp increase in pressure on the pump side. Therefore, the drainage pump can be effectively protected and its safe operation can be guaranteed.

[0022] In one embodiment, the pressure balance pipe includes a vertical section extending along a vertical direction and an inclined section extending obliquely relative to the vertical direction.

[0023] By configuring the pressure balancing tube to include a vertical section extending in the vertical direction and an inclined section extending obliquely relative to the vertical direction, the pressure balancing tube is made into a bent structure rather than a straight tube structure extending in the vertical direction, thereby preventing condensed water from rushing straight upward and overflowing along the pressure balancing tube, and further ensuring that the condensed water will not damage the internal components of the gas water heater due to overflow.

[0024] In one embodiment, the sealing cover is provided with a first sewage outlet connected to the purification chamber, and / or the liquid collecting shell is provided with a second sewage outlet connected to the liquid collecting chamber.

[0025] By providing a first drain port connected to the purification chamber on the cover, and / or providing a second drain port connected to the liquid collecting chamber on the liquid collecting shell, the first drain port and / or the second drain port can be externally connected to the drain valve at the bottom of the gas water heater. When the condensed water recovery and treatment device fails, the drain valve can be opened to allow the condensed water to be discharged through the first drain port and / or the second drain port, so that emergency treatment can be carried out to avoid sudden shutdown of the gas water heater, thereby meeting the immediate use needs of users.

[0026] In one embodiment, the purification shell and the heat exchange shell are integrally connected.

[0027] By connecting the purification shell and the heat exchange shell as one body, there is no need to provide an additional docking part for docking the purification module and the heat exchange module, thereby simplifying the structure and saving manufacturing costs.

[0028] A gas water heater, comprising:

[0029] Water inlet pipe, water outlet pipe and smoke pipe;

[0030] A heating device, the heating device comprising a combustion chamber, a burner arranged in the combustion chamber and a main heat exchanger, wherein a water outlet end of the main heat exchanger is connected to the water outlet pipe;

[0031] In the condensate recovery and treatment device as described in any of the above schemes, the heat exchange cavity is connected to the combustion cavity and the smoke duct respectively, the water inlet end of the auxiliary heat exchanger is connected to the water inlet pipe, the water outlet end of the auxiliary heat exchanger is connected to the water inlet end of the main heat exchanger, and the water outlet end of the drainage pump is connected to the water outlet pipe.

[0032] The gas water heater connects the water outlet of the main heat exchanger of the heating device to the water outlet pipe, connects the heat exchange cavity of the condensed water recovery and treatment device to the combustion cavity and the smoke pipe of the heating device respectively, connects the water inlet of the auxiliary heat exchanger to the water inlet pipe, connects the water outlet of the auxiliary heat exchanger to the water inlet of the main heat exchanger, and connects the water outlet of the drainage pump to the water outlet pipe. When the heating device is heating, the smoke is discharged from the smoke pipe, and the condensed water generated by the condensation of the smoke can be recovered and treated by the condensed water recovery and treatment device, and then flows out from the water outlet pipe after merging with the hot water heated by the heating device, so that there is no need to connect an external condensed water drainage pipe, the condensed water is recycled and utilized, and the trouble of condensed water discharge is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG. 1 is a schematic diagram of the internal structure of a gas water heater provided in one embodiment of the present application.

[0034] FIG. 2 is a piping schematic diagram of a gas water heater provided in an embodiment of the present application.

[0035] Figure 3 A piping schematic diagram of a condensate recovery and treatment device provided in one embodiment of the present application.

[0036] Figure 4 A partial piping schematic diagram of a condensate recovery and treatment device provided in one embodiment of the present application.

[0037] Figure 5 A schematic diagram of the structure of a condensate water recovery and treatment device provided in one embodiment of the present application.

[0038] Figure 6 A partial structural cross-sectional view of a condensate water recovery and treatment device provided in one embodiment of the present application.

[0039] Figure 7 for Figure 6 A magnified schematic diagram of area A in the middle.

[0040] Figure 8A schematic diagram of the structure of a purification module in a condensate water recovery and treatment device provided in one embodiment of the present application.

[0041] Fig. 9 A partial structural schematic diagram of a condensate water recovery and treatment device provided in one embodiment of the present application.

[0042] Fig.10 A partial structural schematic diagram of a condensate water recovery and treatment device provided in another embodiment of the present application.

[0043] Description of reference numerals:

[0044] 10. Gas water heater; 100. Water system; 110. Water inlet pipe; 120. Water outlet pipe; 130. Water pump; 200. Heating device; 201. Combustion chamber; 210. Gas pipe; 220. Burner; 230. Main heat exchanger; 240. Gas proportional valve; 300. Condensate recovery and treatment device; 310. Heat exchange module; 311. Heat exchange shell; 311a. Heat exchange chamber; 312. Auxiliary heat exchanger; 313. Third liquid level monitoring element; 320. Purification module; 321. Purification shell; 321a. Purification chamber; 321b. First chamber; 321c. Second chamber; 321d. Third chamber; 322. Filter element assembly; 322a. Neutralization filter element; 322b. Filter element; 322c. Filter layer; 323. Connecting part; 324, clamping ring; 325, first liquid level monitoring element; 326, second liquid level monitoring element; 327, sealing cover; 327a, first sewage outlet; 330, drainage pump; 340, liquid collecting module; 341, liquid collecting shell; 341a, liquid collecting cavity; 341b, drainage outlet; 341c, second sewage outlet; 341d, pressure discharge outlet; 341e, connecting groove; 350, one-way valve; 360, clamping claw; 370, sealing ring; 380, clamping plate; 390, pressure balance pipe; 390a, vertical section; 390b, inclined section; 3100, circulation pressure relief pipe; 3110, pipeline pressure sensor; 3120, pressure relief valve; 400, temperature sensor; 500, controller; 600, fan; 700, smoke pipe; 800, sewage valve. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0051] The present application provides a condensate recovery and treatment device and a gas water heater including the condensate recovery and treatment device, wherein the gas water heater is used to heat cold water entering the gas water heater from an external water source to meet people's daily life needs, and the condensate recovery and treatment device is used to recover and treat condensate generated by flue gas condensation when the gas water heater is in use, so as to achieve the recycling of condensate and solve the problem of condensate discharge.

[0052] The following takes the use of the condensed water recovery and treatment device in a gas water heater as an example to explain the internal structure of the gas water heater and the structure of the condensed water recovery and treatment device in the present application. This embodiment is only used as an example and does not limit the technical scope of the present application. It can be understood that in other embodiments, the condensed water recovery and treatment device of the present application is not limited to being used in a gas water heater, but can also be used in other equipment or occasions where condensed water needs to be recycled, which is not limited here.

[0053] Referring to FIG. 1 and FIG. 2 , FIG. 1 shows a schematic diagram of the internal structure of a gas water heater 10 provided in an embodiment of the present application, and FIG. 2 shows a schematic diagram of the piping principle of a gas water heater 10 provided in an embodiment of the present application. A gas water heater 10 provided in an embodiment of the present application comprises a water system 100, a heating device 200, and a condensed water recovery and treatment device 300, wherein the water system 100 comprises an inlet pipe 110 and an outlet pipe 120, and a water pump 130 is arranged on the inlet pipe 110; the heating device 200 is connected to the condensed water recovery and treatment device 300, and is also connected to the outlet pipe 120; the condensed water recovery and treatment device 300 is connected to the inlet pipe 110, so that the heating device 200 is also connected to the inlet pipe 110, and the condensed water recovery and treatment device 300 is also connected to the outlet pipe 120. The water inlet pipe 110 is used to connect to an external water source, and the water pump 130 is used to pump cold water from the external water source from the water inlet pipe 110 into the condensate recovery and treatment device 300; the heating device 200 has a gas pipe 210, and the gas pipe 210 is used to pass natural gas, and the natural gas is used as an energy source for generating heat energy, so that the heating device 200 can heat the cold water pumped from the water inlet pipe 110; the water outlet pipe 120 is used to discharge the heated hot water to meet people's daily needs. The condensate recovery and treatment device 300 is used to preheat the cold water pumped from the water inlet pipe 110 before the cold water is heated by the heating device 200, and to recover and treat the condensate (i.e., condensate) formed by the flue gas during heating, and inject it into the water system 100, specifically discharge it to the water outlet pipe 120, and mix it with the hot water heated by the heating device 200 in the water outlet pipe 120, so that the recovered condensate can be recycled again.

[0054] Specifically, in one embodiment, the heating device 200 includes a combustion chamber 201, a burner 220 and a main heat exchanger 230 arranged in the combustion chamber 201, the burner 220 is connected to the gas pipe 210, and a gas proportional valve 240 is provided on the gas pipe 210. The water inlet end of the main heat exchanger 230 is connected to the water inlet pipe 110 through the condensate recovery and treatment device 300, and the water outlet end of the main heat exchanger 230 is connected to the water outlet pipe 120. The gas proportional valve 240 is used to control the amount of gas introduced. Under the combustion action of the burner 220, the cold water pumped into the water inlet pipe 110 by the water pump 130 and flowing through the main heat exchanger 230 will be heated to a certain temperature and finally discharged from the water outlet pipe 120. Preferably, a temperature sensor 400 is provided at the position of the water outlet pipe 120. Correspondingly, a controller 500 is provided in the gas water heater 10 and is communicatively connected to the temperature sensor 400 and the burner 220. The temperature sensor 400 is used to measure the water temperature discharged from the water outlet pipe 120. When the water temperature is too high or too low, the temperature sensor 400 will feed back the measured water temperature to the controller 500, so that the controller 500 can control the burner 220 to heat or stop heating.

[0055] Furthermore, since the burner 220 generates a large amount of flue gas during the combustion process, in order to discharge the flue gas in time, the gas water heater 10 also includes a fan 600 and a smoke duct 700. The smoke duct 700 is connected to the condensate recovery and treatment device 300. The fan 600 can quickly blow the generated flue gas into the condensate recovery and treatment device 300 so that the heat in the flue gas can preheat the cold water flowing in from the water inlet pipe 110. After the preheating is completed, the flue gas can be discharged from the smoke duct 700 to the outside of the gas water heater 10.

[0056] Combined with Figure 2 and Figure 3 As shown, in one embodiment, the condensate recovery and treatment device 300 includes a heat exchange module 310, a purification module 320, and a drainage water pump 330. The heat exchange module 310 includes a heat exchange shell 311 and an auxiliary heat exchanger 312 connected to each other, the water inlet end of the auxiliary heat exchanger 312 is connected to the water inlet pipe 110, and the water outlet end is connected to the main heat exchanger 230 of the heating device 200; the heat exchange shell 311 has a heat exchange cavity 311a, and the heat exchange cavity 311a is connected to the combustion cavity 201 and the smoke pipe 700 respectively. When the fan 600 is running, the flue gas generated by the burner 220 of the heating device 200 during combustion can quickly enter the auxiliary heat exchanger 312, so as to preheat the cold water pumped into the auxiliary heat exchanger 312 from the water inlet pipe 110, so that the preheated cold water can enter the main heat exchanger 230 of the heating device 200. At the same time, the water vapor in the flue gas produces condensed water in the heat exchange cavity 311a.

[0057] See also Figure 3 and Figure 4 The purification module 320 includes a purification housing 321, which is connected to the outer wall of the heat exchange housing 311 and has a purification cavity 321a connected to the heat exchange cavity 311a. A filter element assembly 322 is provided in the purification cavity 321a. The filter element assembly 322 is used to adjust the pH value and filter and purify the condensed water discharged from the heat exchange cavity 311a to the purification cavity 321a. The water inlet end of the drainage water pump 330 is connected to the purification cavity 321a, and the water outlet end of the drainage water pump 330 is connected to the water system 100 of the gas water heater 10 through a one-way valve 350, specifically, connected to the outlet pipe 120, for injecting condensed water into the outlet pipe 120 and merging with the hot water heated by the heating device 200.

[0058] Optionally, the condensate recovery and treatment device 300 also includes a liquid collection module 340 connected to the purification module 320, and the liquid collection module 340 includes a liquid collection shell 341, and the liquid collection shell 341 has a liquid collection cavity 341a connected to the purification cavity 321a, and the liquid collection cavity 341a is also provided with a drain port 341b, and the drain port 341b is connected to the water inlet end of the drainage pump 330.

[0059] In this way, external cold water can be pumped into the auxiliary heat exchanger 312 of the heat exchange module 310 from the water inlet pipe 110, and the flue gas generated by the combustion of the burner 220 can be blown into the auxiliary heat exchanger 312 by the fan 600, so that the auxiliary heat exchanger 312 can preheat the water entering the auxiliary heat exchanger 312. The preheated water then flows from the auxiliary heat exchanger 312 into the main heat exchanger 230 of the heating device 200 to be further heated and then discharged from the water outlet. At the same time, the water vapor in the flue gas releases latent heat and condenses into liquid condensed water and enters the heat exchange cavity 311a. Then, the liquid condensed water is discharged from the heat exchange cavity 311a to the purification cavity 321a of the purification shell 321 to undergo pH neutralization treatment and filtration treatment. Then, it is discharged to the liquid collecting cavity 341a of the liquid collecting shell 341 to be collected. Finally, it is discharged to the water outlet pipe 120, and after merging with the hot water heated by the heating device 200, it is discharged from the water outlet pipe 120, thereby achieving the purpose of recycling the condensed water and avoiding the direct discharge of the condensed water to cause a waste of water resources.

[0060] See also Figure 5 In a preferred embodiment, the purification shell 321 and the heat exchange shell 311 are integrally connected. By so configuring, the structure of the condensate recovery and treatment device 300 can be kept simple, and there is no need to additionally configure a docking part for docking the purification module 320 and the heat exchange module 310 with each other, thereby simplifying the structure and saving manufacturing costs.

[0061] More preferably, if Figure 6 As shown, the drainage pump 330, the one-way valve 350 and other components are integrated with the liquid collecting shell 341, and the heat exchange module 310 and the purification module 320 are integrally connected. This makes the condensate recovery and treatment device 300 provided in the present application more compact and convenient for the design and layout of the internal structure of the gas water heater 10.

[0062] As for the connection structure between the purification housing 321 and the liquid collection housing 341, see Figure 6 and Figure 7The side wall of the purification shell 321 has a protruding connecting portion 323, and the side wall of the liquid collecting shell 341 is provided with a connecting groove 341e. The connecting portion 323 is inserted into the connecting groove 341e, and the outer wall of the connecting portion 323 is provided with a sealing ring 370, so as to ensure the sealing of the connection position between the purification shell 321 and the liquid collecting shell 341, and prevent condensed water from leaking when it flows through the connection position between the purification shell 321 and the liquid collecting shell 341. Furthermore, in order to ensure that the connecting part 323 can be firmly inserted into the connecting groove 341e without falling off, the outer circumference of the connecting part 323 is sleeved with a cylindrical claw 360, and the outer circumference of the claw 360 is provided with a groove surrounding its own central axis, and the inner circumference of the connecting groove 341e has a clamping ring 324 surrounding the central axis of the connecting groove 341e, and the clamping ring 324 is clamped in the clamping groove, so that the connecting part 323 is fixedly inserted into the connecting groove 341e through the clamping claw 360 and will not fall off.

[0063] In some cases, the size of the slot along the axial direction of the claw 360 is larger than the size of the snap ring 324 in the axial direction. In order to further ensure that the snap ring 324 is fixedly engaged in the slot, a clamping plate 380 is sleeved on the outer circumference of the slot, one side of the clamping plate 380 abuts against the side wall of the slot, and the other side abuts against the side wall of the liquid collecting housing 341. In this way, when the size of the slot along the axial direction of the claw 360 is larger than the size of the snap ring 324 in the axial direction, the clamping plate 380 is provided so that the snap ring 324 can be firmly fixed in the slot, thereby preventing the purification module 320 and the liquid collecting housing 341 from accidentally falling off after being connected.

[0064] See also Figure 8 , Figure 8 1 shows a schematic diagram of the internal structure of a purification chamber 321a of an embodiment. In this embodiment, two partitions are provided in the purification chamber 321a, so that the purification chamber 321a is divided into three chambers, which are a first chamber 321b, a second chamber 321c and a third chamber 321d which are arranged adjacent to each other in the horizontal direction and are interconnected. The filter element assembly 322 includes a neutralizing filter element 322a and a filtering filter element 322b, wherein the neutralizing filter element 322a is arranged in the first chamber 321b, and the filtering filter element 322b is arranged in the second chamber 321d. 1c, in this embodiment, the neutralizing filter element 322a is used to perform the first treatment on the acidic condensate water discharged from the heat exchange chamber 311a to the first chamber 321b, that is, to neutralize the acidic condensate water to reduce the acidity of the condensate water, so that the condensate water changes from acidic to neutral or weakly acidic, and also performs preliminary filtration on the condensate water; the filter element 322b is used to perform the second treatment on the neutralized condensate water, and to deeply filter and purify the condensate water, so that the water quality of the treated condensate water entering the third chamber 321d is good and can be recycled later.

[0065] Please continue reading Figure 8 In this embodiment, the first cavity 321b is connected to the bottom of the second cavity 321c, and the second cavity 321c is connected to the top of the third cavity 321d, so that when there is condensed water in both the first cavity 321b and the second cavity 321c, the liquid levels of the condensed water in the first cavity 321b and the second cavity 321c can be consistent, so that the condensed water can be temporarily accumulated and precipitated, and the condensed water can be fully infiltrated and contacted with the filter element 322b in the second cavity 321c to achieve a sufficient purification effect. When the treated condensed water is fully stationary in the second cavity 321c and the liquid level is full, the condensed water can cross the partition and overflow from the top of the second cavity 321c to the third cavity 321d, so that it can enter the liquid collection cavity 341a downstream and be collected.

[0066] Furthermore, in order to further filter the condensed water in the third cavity 321d, a filter layer 322c is also provided on the bottom wall of the third cavity 321d, so that the condensed water can be further filtered in the third cavity 321d after being processed by the neutralization filter element 322a and the filter filter element 322b, thereby further improving the water quality of the recovered condensed water.

[0067] Figure 6 Shown is a schematic diagram of the internal structure of a purification module 320 of another embodiment. In this embodiment, no partition is provided in the purification chamber 321a, so that the purification chamber 321a is a separate chamber, and a filter element 322b and a neutralization filter element 322a are also provided inside the purification chamber 321a. The filter element 322b and the neutralization filter element 322a are sequentially stacked in the purification chamber 321a along the flow direction of the condensed water, that is, as shown in the figure, the filter element 322b and the neutralization filter element 322a are adjacently arranged from top to bottom in the vertical direction. Among them, the filter element 322b is a porous filter element, which is used for preliminary filtering of the condensed water to filter out large particles of impurities in the condensed water; the neutralization filter element 322a has the same function as the neutralization filter element 322a in the previous embodiment, which is used to neutralize the pH of the condensed water to reduce the acidity of the condensed water, which will not be described in detail here. After the filtration and neutralization are completed, as shown in the figure, Figure 6 As indicated by the middle arrow, the condensed water flows through the connecting portion 323 of the purification housing 321 and enters the liquid collecting cavity 341 a of the liquid collecting housing 341 .

[0068] It is understandable that the purification chamber 321a may be a structure including three chambers as in the above embodiment or a structure including only one chamber, or only a partition may be provided in the purification chamber 321a, so that the purification chamber 321a includes only two chambers, namely, only the first chamber 321b and the third chamber 321d, and the first chamber 321b is provided with a neutralization filter element 322a for neutralizing the pH value of the condensed water, but no filter element 322b is provided. Alternatively, it may only include the first chamber 321b and the second chamber 321c, and the neutralization filter element 322a is provided in the first chamber 321b, and the filter element 322b is provided in the second chamber 321c, and more chambers may be provided, and the above is not limited.

[0069] Optionally, a cover 327 is detachably provided at the bottom end of the purification shell 321. The cover 327 can be threadedly connected to the purification shell 321 to block the opening of the purification shell 321, or the cover 327 is sleeved on the outer periphery of the opening of the purification shell 321 and has an interference fit with the purification shell 321 to block the opening of the purification shell 321. The cover 327 can also be inserted into the opening of the purification shell 321 and has an interference fit with the purification shell 321 to block the opening of the purification shell 321, so that the cover 327 can be removed from the bottom end of the purification shell 321, so that the filter element assembly 322 can be easily disassembled and replaced after long-term use, simplifying the user's operation and improving the user's experience.

[0070] It is worth noting that due to the high water pressure generated when the water pump is running, especially in some cases, when the drainage on the one side of the one-way valve 350 downstream of the drain port 341b of the liquid collecting chamber 341a is blocked, the condensed water cannot be discharged smoothly from the drain port 341b. At this time, the pressure on the side of the drain pump 330 will increase sharply, which may easily cause damage to the drain pump 330 or cause the liquid level in the liquid collecting chamber 341a to increase sharply; in some other cases, although the condensed water can be discharged normally from the drain port 341b, the upstream fan 600 may malfunction and fail to generate enough condensed water in the heat exchange chamber 311a in time to replenish the liquid collecting chamber 341a. The liquid level in the liquid collecting chamber 341a may drop sharply. Once the liquid level of the condensed water in the liquid collecting chamber 341a is too high or too low, it may cause damage to the gas water heater 10.

[0071] To address the above issues, see Figure 3 and Figure 5The liquid collecting module 340 is also provided with a first liquid level monitoring element 325 and a second liquid level monitoring element 326, which are respectively used to monitor the bottom liquid level and the top liquid level of the condensed water in the liquid collecting cavity 341a, and / or the heat exchange module 310 is provided with a third liquid level monitoring element 313, which is used to monitor the liquid level of the condensed water in the heat exchange cavity 311a, so as to be able to send a signal to the controller 500 when the liquid level of the condensed water in the condensed water recovery and treatment device 300 is too high or too low, so that the controller 500 can take necessary emergency measures to avoid damage to the gas water heater 10.

[0072] Furthermore, when the drainage on one side of the one-way valve 350 is blocked and the liquid level of the condensed water in the condensed water recovery and treatment device 300 is too high, as one of the emergency measures that can be taken, the excess condensed water can be urgently discharged from the condensed water recovery and treatment device 300. To this end, in a preferred embodiment, the condensed water recovery and treatment device 300 is provided with a sewage outlet. Figure 5 and Figure 6 In the embodiment shown in , the condensate recovery and treatment device 300 is provided with two drain outlets, which are respectively a first drain outlet 327a and a second drain outlet 341c, wherein the first drain outlet 327a is provided on the cover 327 and is connected to the purification chamber 321a, and the second drain outlet 341c is provided on the liquid collecting shell 341 and is connected to the liquid collecting chamber 341a, and the shell of the gas water heater 10 is provided with two drain valves 800, and the two drain valves 800 are respectively connected to a corresponding drain outlet, and the drain outlet can be opened and closed by controlling the drain valve 800, so that condensed water can be discharged from the drain outlet.

[0073] It can be seen that by providing the first drain port 327a and the second drain port 341c, on the one hand, when the condensate level in the condensate recovery and treatment device 300 is too high, the drain valve 800 can be opened to allow the condensate to be discharged from the first drain port 327a and the second drain port 341c in time, so that emergency treatment can be carried out to avoid the sudden shutdown of the gas water heater 10, thereby meeting the user's immediate use needs. On the other hand, before replacing the filter element assembly 322, the residual condensate in the purification chamber 321a can also be discharged from the first drain port 327a, so that when replacing the filter element assembly 322, it can be avoided that there is residual condensate flowing out while disassembling, thereby avoiding inconvenience to the user when disassembling the filter element assembly 322.

[0074] It is understandable that in some embodiments, only one sewage outlet may be provided, such as Fig. 9 As shown, only the first drain port 327a is opened on the cover 327 or as shown in Fig.10As shown, only the second drain port 341c is opened on the liquid collecting shell 341, and the drain port can be set according to its lower position to facilitate the discharge of the internal condensed water. However, it is obvious that opening the first drain port 327a and the second drain port 341c at the same time is the best embodiment, because opening the first drain port 327a and the second drain port 341c at the same time can make it convenient to discharge the condensed water in the purification chamber 321a and the liquid collecting chamber 341a, thereby avoiding the phenomenon that the condensed water in the purification chamber 321a or the liquid collecting chamber 341a is difficult to discharge.

[0075] In addition, in some cases, due to the large difference between the pressure inside the liquid collecting chamber 341a and the pressure outside, the condensed water cannot be smoothly drained into the liquid collecting chamber 341a. To avoid this phenomenon, refer to Figure 4 , Fig. 9 and Fig.10 The liquid collecting module 340 also includes a pressure balancing pipe 390, and a pressure discharge port 341d connected to the liquid collecting cavity 341a is also provided on the liquid collecting shell 341. One end of the pressure balancing pipe 390 is connected to the pressure discharge port 341d, and the other end is connected to the external environment, so that the liquid collecting cavity 341a can be connected to the outside of the liquid collecting cavity 341a through the pressure balancing pipe 390, thereby balancing the internal and external pressures of the liquid collecting cavity 341a, and further ensuring that the condensed water is smoothly discharged from the purification cavity 321a to the liquid collecting cavity 341a. Preferably, the end of the pressure balance tube 390 away from the liquid collecting shell 341 is located above the liquid collecting module 340 and the purification module 320, so that the end of the pressure balance tube 390 away from the pressure discharge port 341d can extend to the outside of the body of the gas water heater 10. In this way, it is possible to prevent condensed water from overflowing from the pipe mouth of the pressure balance tube 390 due to excessive pressure during the process of being discharged from the bottom of the purification module 320 to the liquid collecting cavity 341a, thereby preventing condensed water from damaging the components inside the gas water heater 10 or causing a short circuit in the electronic components.

[0076] Further, based on the above embodiments, please continue to refer to Figure 4 , Fig. 9 and Fig.10 The condensate recovery and treatment device 300 also includes a circulating pressure relief pipe 3100, a pipeline pressure sensor 3110 and a pressure relief valve 3120. One end of the circulating pressure relief pipe 3100 is connected to the drain port 341b opened in the liquid collecting cavity 341a, and the other end is connected to the pressure balance pipe 390. The pressure relief valve 3120 is arranged on the circulating pressure relief pipe 3100 and is communicatively connected to the controller 500. The pipeline pressure sensor 3110 is arranged downstream of the drainage pump 330 and upstream of the one-way valve 350, and is also connected to the controller 500. It is used to measure the pipeline pressure on one side of the drainage pump 330.

[0077] In this way, through the above-mentioned arrangement, when the drainage on one side of the one-way valve 350 located downstream of the drain outlet 341b is blocked, resulting in the condensed water being unable to be discharged smoothly from the drain outlet 341b, the pipeline pressure sensor 3110 can measure the sharp increase in pressure on one side of the drain pump 330, thereby immediately sending a pressure increase signal to the controller 500, prompting the controller 500 to control the pressure relief valve 3120 to open, so that the liquid collecting chamber 341a and the circulating pressure relief pipe 3100 form a circulating pipeline together to release the pressure, thereby avoiding damage to the drain pump 330 due to the sharp increase in pressure on one side of the drain pump 330, thereby effectively protecting the drain pump 330 and protecting the safe operation of the drain pump 330.

[0078] In a more preferred embodiment, see Figure 4 and Figure 5 The pressure balance pipe 390 includes a vertical section 390a extending in the vertical direction and an inclined section 390b inclined relative to the vertical direction, so that the pressure balance pipe 390 is a bent structure rather than a straight pipe structure extending in the vertical direction, and the end of the circulating pressure relief pipe 3100 connected to the pressure balance pipe 390 is also inclined downward. Figure 4 and Figure 5 It can be seen that the circulating pressure relief pipe 3100 is connected to the pressure balance pipe 390 in an approximately Y-shape, so that the condensed water in the liquid collecting cavity 341a can be prevented from rushing upward and overflowing along the pressure balance pipe 390, thereby further ensuring that the condensed water will not damage the internal components of the gas water heater 10 due to overflow.

[0079] The following combined Figure 3 The working process of the condensate recovery and treatment device 300 in the gas water heater 10 provided in the present application is described as follows:

[0080] When the gas water heater 10 is running and condensed water is generated in the heat exchange cavity 311a of the heat exchange module 310, the condensed water enters the purification cavity 321a of the purification module 320 from the heat exchange cavity 311a, and enters the liquid collection cavity 341a of the liquid collection module 340 after being neutralized, filtered and purified. When the second liquid level monitoring element 326 in the liquid collection cavity 341a detects that the liquid level reaches the upper limit (i.e., Figure 3 When the first liquid level monitoring element 325 detects that the liquid level drops to the lower limit (i.e. Figure 3When the drainage pump 330 is stopped and drainage is performed (H1) in the flow chart; when the drainage pump 330 encounters drainage obstruction and the pipeline pressure increases, the pipeline pressure sensor 3110 will monitor the rising water pressure fluctuation at this time. When the pressure reaches the highest threshold, the controller 500 controls the pressure relief valve 3120 to open, so that the circulating pressure relief pipe 3100 and the liquid collecting cavity 341a form a circulating pipeline to release the pressure, thereby protecting the safe operation of the drainage pump 330.

[0081] If the discharge of condensed water is blocked so that the liquid level in the liquid collecting chamber 341a continues to rise and exceeds the water level monitoring position H2 in the liquid collecting chamber 341a, when the third liquid level monitoring element 313 in the heat exchange chamber 311a detects that the liquid level has reached the position H3, the gas water heater 10 will automatically switch to the discharge mode. At this time, the controller 500 will control the drain valve 800 to open, so that the condensed water can be discharged from the first drain port 327a and the second drain port 341c to the external drain pipe, thereby avoiding sudden shutdown of the gas water heater 10 to meet the user's immediate use needs.

[0082] When the sewage pipe is not smooth and the condensed water still cannot be discharged smoothly, resulting in the condensed water level still rising, the controller 500 will control the gas water heater 10 to stop working to prevent the liquid level from continuing to rise and overflowing the heat exchange module 310, thereby preventing the condensed water from entering the fan 600 and other components, avoiding damage to the gas water heater 10. When the drainage pump 330 is cleared of drainage obstruction and the condensed water level returns to normal, the monitoring value of the pipeline pressure sensor 3110 also returns to normal, and then the gas water heater 10 re-enters the normal operating state.

[0083] It can be seen that the gas water heater 10 provided in the present application connects the heat exchange module 310 of the condensate recovery and treatment device 300 to the heating device 200 and the water inlet pipe 110 at the same time, and connects the liquid collecting module 340 of the condensate recovery and treatment device 300 to the water outlet pipe 120, so that when the heating device 200 is heating, the condensate generated by the condensation of the flue gas can be recovered and treated by the condensate recovery and treatment device 300, and then injected into the water system 100 of the gas water heater 10 to merge with the hot water heated by the heating device 200 and then flow out from the water outlet pipe 120, thereby eliminating the need for an external condensate drain pipe, thereby realizing the recycling of condensate and solving the trouble of discharging condensate. It is also possible to easily replace the filter element assembly 322, and can always ensure the safe operation of the gas water heater 10, greatly improving the user experience.

[0084] Finally, it should be noted that the various technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A condensate water recovery and treatment device, It is characterized in that include: A heat exchange module (310) comprises a heat exchange shell (311) and an auxiliary heat exchanger (312), wherein the heat exchange shell (311) has a heat exchange cavity (311a); A purification module (320), comprising a purification housing (321), a filter element assembly (322) and a cover (327), wherein the purification housing (321) is connected to the outer wall of the heat exchange housing (311), the purification housing (321) has a purification cavity (321a) connected to the heat exchange cavity (311a), a filter element assembly (322) is arranged in the purification cavity (321a), the filter element assembly (322) is used to purify condensed water flowing from the heat exchange cavity (311a) into the purification cavity (321a), and the purification housing (321) is provided with an opening for disassembling and assembling the filter element assembly (322); the cover (327) is detachably sealed from the opening of the purification housing (321); A drainage water pump (330), wherein the water inlet end of the drainage water pump (330) is connected to the purification chamber (321a), and the water outlet end of the drainage water pump (330) is connected to the water system of the gas water heater, and is used to inject the condensed water into the water system of the gas water heater.

2. The condensed water recovery and treatment device according to claim 1, It is characterized in that The sealing cover (327) is threadedly connected to the purification shell (321) to seal the opening of the purification shell (321); or, the sealing cover (327) is sleeved on the outer periphery of the opening of the purification shell (321) and is interference-fitted with the purification shell (321) to seal the opening of the purification shell (321); or, the sealing cover (327) is inserted into the opening of the purification shell (321) and is interference-fitted with the purification shell (321) to seal the opening of the purification shell (321).

3. The condensed water recovery and treatment device according to claim 1, It is characterized in that The filter element assembly (322) comprises a filter element (322b) and a neutralization filter element (322a), and the filter element (322b) and the neutralization filter element (322a) are sequentially stacked in the purification cavity (321a) along the flow direction of the condensed water; Alternatively, the purification chamber (321a) includes a first chamber (321b) and a second chamber (321c) that are interconnected, and the first chamber (321b) is connected to the heat exchange chamber (311a); the filter element assembly (322) includes a neutralizing filter element (322a) disposed in the first chamber (321b) and a filtering filter element (322b) disposed in the second chamber (321c).

4. The condensed water recovery and treatment device according to claim 1, It is characterized in that It also includes a liquid collection module (340), the liquid collection module (340) includes a liquid collection shell (341), the liquid collection shell (341) has a liquid collection cavity (341a) connected to the purification cavity (321a); ​​the outer wall of the purification shell (321) has a connecting portion (323), the outer wall of the liquid collection shell (341) is provided with a connecting groove (341e), and the connecting portion (323) is inserted into the connecting groove (341e).

5. The condensed water recovery and treatment device according to claim 4, It is characterized in that The outer circumference of the connecting portion (323) is sleeved with a claw (360), and the outer circumference of the claw (360) is provided with a slot. The inner circumference of the connecting slot (341e) has a snap ring (324), and the snap ring (324) is snapped into the slot, so that the connecting portion (323) is fixedly inserted into the connecting slot (341e) through the claw (360).

6. The condensed water recovery and treatment device according to claim 4, It is characterized in that The liquid collecting module (340) further comprises a pressure balancing pipe (390) and a circulating pressure relief pipe (3100); the liquid collecting shell (341) is provided with a drain port (341b) and a pressure relief port (341d) connected to the liquid collecting cavity (341a); the drain port (341b) is connected to the water inlet end of the drainage water pump (330); one end of the pressure balancing pipe (390) is connected to the pressure relief port (341d), and the other end is connected to the external environment and is located above the liquid collecting module (340) and the purification module (320); one end of the circulating pressure relief pipe (3100) is connected to the drain port (341b), and the other end is connected to the pressure balancing pipe (390).

7. The condensed water recovery and treatment device according to claim 6, It is characterized in that The pressure balance pipe (390) comprises a vertical section (390a) extending in a vertical direction and an inclined section (390b) extending obliquely relative to the vertical direction.

8. The condensed water recovery and treatment device according to claim 4, It is characterized in that The sealing cover (327) is provided with a first sewage outlet (327a) connected to the purification chamber (321a), and / or the liquid collection shell (341) is provided with a second sewage outlet (341c) connected to the liquid collection chamber (341a).

9. The condensed water recovery and treatment device according to claim 1, It is characterized in that The purification shell (321) and the heat exchange shell (311) are integrally connected.

10. A gas water heater, It is characterized in that include: A water inlet pipe (110), a water outlet pipe (120) and a smoke pipe (700); A heating device (200), the heating device (200) comprising a combustion chamber (201), a burner (220) disposed in the combustion chamber (201), and a main heat exchanger (230), wherein a water outlet end of the main heat exchanger (230) is connected to the water outlet pipe (120); According to the condensate recovery and treatment device (300) as described in any one of claims 1 to 9, the heat exchange cavity (311a) is respectively connected to the combustion cavity (201) and the smoke pipe (700), the water inlet end of the auxiliary heat exchanger (312) is connected to the water inlet pipe (110), the water outlet end of the auxiliary heat exchanger (312) is connected to the water inlet end of the main heat exchanger (230), and the water outlet end of the drainage pump (330) is connected to the water outlet pipe (120).

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