Condensate water treatment device of gas water heater, gas water heater and operation method of gas water heater

Abstract

The invention discloses a condensate water treatment device of a gas water heater, the gas water heater and an operation method of the gas water heater. The condensate water treatment device of the gas water heater comprises a condensate water collecting assembly, the condensate water collecting assembly comprises a condensate water box, the condensate water box is provided with a water receiving port and a water outlet port, the water receiving port is communicated with a condensate water outlet of a condensation heat exchanger of the gas water heater, and the water receiving port is higher than the water outlet port; the control valve assembly comprises a valve body and a bypass valve, the valve body comprises a first pipeline and a second pipeline, the bypass valve is arranged between the first pipeline and the second pipeline and used for controlling connection and disconnection between the first pipeline and the second pipeline, a first water inlet is formed in one end of the first pipeline, and a first water outlet is formed in the other end of the first pipeline. The first water inlet communicates with a water supply pipeline outside the gas water heater, the first water outlet communicates with the water inlet end of a hot water pipeline of the gas water heater, and a second water inlet is formed in one end of the second pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a condensate treatment device for a gas water heater, a gas water heater and an operating method thereof. Background Art

[0002] Existing condensing gas water heaters produce weakly acidic condensate when working. The condensate contains components such as carbonic acid, nitrous acid, and sulfurous acid, which are corrosive to a certain extent. It is necessary to use a condensate collection box to collect the condensate, and after neutralizing it with alkaline filter material, it is drained to the sewer using the drain pipe reserved in the user's home. The setting of the condensate drain pipe affects the aesthetics of the water heater. Users who do not have a drain pipe reserved in advance at home will either choose to drain the condensate to the balcony through the drain pipe, but such a setting will not only affect the aesthetics of the water heater, but also cause water dripping from high altitude. Or they will choose to set up a water collection box on the outside of the water heater and manually pour out the condensate in the water collection box regularly, which is inconvenient to operate.

[0003] Therefore, there is an urgent need for a condensate treatment device for a gas water heater to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a condensate treatment device for a gas water heater. A condensate collection component is provided to collect condensate in a condensation heat exchanger, and then the condensate is discharged into a hot water pipe through the cooperation of a control valve component and a water pump. The user does not need to dispose of the condensate separately, and the user experience is better. At the same time, by providing a control valve component, the gas water heater can also use the same water pump to operate in a bathing mode, and the structure is simple and compact.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A condensate treatment device for a gas water heater, comprising:

[0007] A condensed water collection assembly includes a condensed water box, the condensed water box is provided with a water receiving port and a water outlet port, the water receiving port is connected to the condensed water outlet of the condensing heat exchanger of the gas water heater, and the water receiving port is arranged higher than the water outlet port;

[0008] A control valve assembly includes a valve body and a bypass valve, the valve body including a first pipe and a second pipe, the bypass valve being arranged between the first pipe and the second pipe, the bypass valve being used to control the on-off connection between the first pipe and the second pipe, a first water inlet being arranged at one end of the first pipe, a first water outlet being arranged at the other end of the first pipe, the first water inlet being communicated with a water supply pipe external to the gas water heater, the first water outlet being communicated with a water inlet end of a hot water pipe of the gas water heater, a second water inlet being arranged at one end of the second pipe, a second water outlet being arranged at the other end of the second pipe, the second water inlet being communicated with the water outlet port, and the second water outlet being communicated with the water inlet end of the hot water pipe;

[0009] A water pump is installed at the water inlet end of the hot water pipe.

[0010] Optionally, the water inlet end of the hot water pipe is provided with a first interface and a second interface, the first interface is connected to the first water outlet, the second interface is connected to the second water outlet, and the water pump is installed between the second interface and the second water outlet.

[0011] Optionally, it also includes:

[0012] a first one-way valve installed between the second water inlet and the water outlet to control the direction of water flow from the water outlet to the second water inlet; and / or

[0013] The second one-way valve is installed between the first water outlet and the first interface to control the direction of water flow from the second water outlet to the first interface.

[0014] Optionally, a flow limiting valve is provided between the first water outlet and the first interface.

[0015] Optionally, it further includes a water flow sensor arranged at the water inlet end of the hot water pipe, and the water flow sensor is located downstream of the first interface and the second interface.

[0016] Optionally, the condensed water collection assembly further includes a neutralization filter element disposed in the condensed water box, and the neutralization filter element is used to neutralize the condensed water in the condensed water box.

[0017] Optionally, the water receiving port is arranged at the upper end of the condensation water box, the water outlet port is arranged at the lower end of the condensation water box, the lower end of the condensation water box has an installation opening, the neutralization filter element includes a filter shell and filter material arranged in the filter shell, a plurality of water-permeable mesh holes are opened on the filter shell, and the bottom end of the filter shell can block the installation opening and be detachably connected to the surrounding side of the installation opening.

[0018] Optionally, a plug is further included, and a bottom shell is further provided at the lower end of the filter housing, and the bottom shell is detachably connected to the bearing shell of the mounting opening. A drainage channel is provided on the bottom shell, and a sewage inlet is provided at the upper end of the drainage channel, and a sewage outlet is provided at the lower end of the drainage channel. The sewage inlet is higher than the mounting opening and the distance from the mounting opening is H1. The height of the condensed water box is H2, and the plug is provided in the sewage outlet for sealing and opening the sewage outlet, H2>H1≥250mm.

[0019] Optionally, an upper liquid level sensor and a lower liquid level sensor are further included, wherein the upper liquid level sensor is arranged at the upper part of the condensation water box, and the lower liquid level sensor is arranged at the lower part of the condensation water box and higher than the water outlet port.

[0020] On the other hand, the present invention provides a gas water heater, comprising a controller, a gas heat exchanger, a condensing heat exchanger connected to the smoke outlet of the gas heat exchanger, and a condensed water treatment device of the above-mentioned gas water heater, wherein the hot water pipe passes through the condensing heat exchanger and the gas heat exchanger in sequence, the controller is communicatively connected with the gas heat exchanger, the bypass valve and the water pump, and a smoke outlet is also provided on the condensing heat exchanger.

[0021] Optionally, a preheating return pipe is further included, one end of which is connected to the water outlet end of the hot water pipe, and the other end is connected to the first water inlet.

[0022] Another aspect of the present invention provides a method for operating the gas water heater as described above, comprising the following steps:

[0023] S1: The gas water heater is in a bathing standby state, and the bypass valve is opened;

[0024] S2: Determine whether L1>L0. If so, go to S3; if not, return to S1.

[0025] S3: Run bathing mode;

[0026] S4: Determine whether the condensed water level in the condensed water box is higher than a first preset position. If so, proceed to S5; if not, return to S3;

[0027] S5: closing the bypass valve and starting the water pump;

[0028] S6: Determine whether the condensed water level in the condensed water box is lower than a second preset position. If so, proceed to S7;

[0029] S7: Turn off the water pump, open the bypass valve, and then return to S2;

[0030] Among them, L1 is the real-time water flow of the hot water pipe, and L0 is the startup water flow.

[0031] Optionally, the following steps are further included between S5 and S6:

[0032] Start timing T1;

[0033] In S6, if the condensed water level in the condensed water box is higher than the second preset position, the following steps are performed:

[0034] S61: Determine whether T1 = T0. If so, proceed to S62. If not, return to S6.

[0035] S62: Determine whether the condensate level in the condensate box is lower than the first preset position. If so, proceed to S7; if not, shut down the engine, turn off the water pump, open the bypass valve, and issue a drainage failure alarm.

[0036] Among them, T0 is the preset drainage time.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] The condensed water treatment device for a gas water heater provided by the present invention collects condensed water in a condensing heat exchanger by setting a condensed water collection component, and then discharges the condensed water into a hot water pipe through cooperation of a control valve component and a water pump. Users do not need to dispose of the condensed water separately, and the user experience is better. At the same time, by setting a control valve component, the gas water heater can also use the same water pump to operate in a bathing mode, and the structure is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 1 is a schematic structural diagram of a gas water heater provided in a first embodiment of the present invention (shower mode);

[0040] Figure 2 Schematic diagram of the structure of the condensate treatment device for a gas water heater provided in the first embodiment of the present invention (condensate discharge state);

[0041] Figure 3 This is a structural schematic diagram of a condensate collecting assembly of a condensate treatment device for a gas water heater provided in a first embodiment of the present invention;

[0042] Figure 4 This is a structural schematic diagram of a control valve assembly of a condensate treatment device for a gas water heater provided in a first specific embodiment of the present invention;

[0043] Figure 5 This is a structural diagram of a condensate treatment device for a gas water heater provided in a specific embodiment of the present invention (circulation preheating mode or boosting mode);

[0044] Figure 6 This is a schematic diagram of the three-dimensional structure of a condensate treatment device for a gas water heater provided in a second specific embodiment of the present invention;

[0045] Figure 7 This is a diagram of the operating steps of the gas water heater provided in the first or second specific embodiment of the present invention.

[0046] In the picture:

[0047] 1. Condensate collection assembly; 11. Condensate box; 111. Water inlet; 112. Upper liquid level sensor; 113. First flange; 114. Water outlet; 115. Lower liquid level sensor; 12. Filter element; 121. Filter housing; 122. Filter material; 123. Permeable mesh; 124. Filter screen; 125. Second flange; 13. First check valve; 14. Sealing ring; 15. Screws; 16. Drain channel; 161. Sewage inlet; 162. Sewage outlet; 17. Plug; 18. Bottom shell;

[0048] 2. Control valve assembly; 21. Valve body; 211. First water inlet; 212. First water outlet; 213. Second water inlet; 214. Second water outlet; 215. First pipeline; 216. Second pipeline; 22. Bypass valve; 23. Second one-way valve; 24. Flow limiting valve;

[0049] 3. Water pump;

[0050] 4. First connecting pipe;

[0051] 5. Water flow sensor;

[0052] 6. Controller;

[0053] 7. Condensation heat exchanger; 71. Condensate outlet; 72. Flue gas outlet;

[0054] 8. Second connecting pipe;

[0055] 100. Hot water pipe; 200. Gas heat exchanger. DETAILED DESCRIPTION

[0056] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0057] Example 1

[0058] Please refer to Figure 1-Figure 5The present invention provides a condensate treatment device for a gas water heater, comprising a condensate collection assembly 1, a control valve assembly 2, and a water pump 3. The condensate collection assembly 1 includes a condensate box 11, which is provided with a water inlet port 111 and a water outlet port 114. The water inlet port 111 is connected to the condensate outlet 71 of the condensing heat exchanger 7 of the gas water heater, and the water inlet port 111 is arranged higher than the water outlet port 114. The control valve assembly 2 includes a valve body 21 and a bypass valve 22. The valve body 21 includes a first pipe 215 and a second pipe 216. The bypass valve 22 is disposed between the first pipe 215 and the second pipe 216 and is used to control the flow of water between the first pipe 215 and the second pipe 216. A first water inlet 211 is disposed at one end of the first pipe 215 and a first water outlet 212 is disposed at the other end. The first water inlet 211 communicates with the water supply pipe outside the gas water heater, and the first water outlet 212 communicates with the water inlet of the hot water pipe 100 of the gas water heater. A second water inlet 213 is disposed at one end of the second pipe 216 and a second water outlet 214 is disposed at the other end of the second pipe 216. The second water inlet 213 communicates with the water outlet port 114, and the second water outlet 214 communicates with the water inlet of the hot water pipe 100. The water pump 3 is installed at the water inlet of the hot water pipe 100. When the gas water heater is in shower mode, the bypass valve 22 is opened and the water pump 3 is turned on, so that water can flow into the valve body 21 from the first water inlet 211, and then flow into the hot water pipe 100 from the first pipe 215 and the second pipe 216 respectively (tap water flows along the Figure 1 In the shower mode, when the water in the condensed water box 11 reaches the preset water volume, the bypass valve 22 is closed, so that the water in the water supply pipe outside the gas water heater can only flow into the hot water pipe 100 through the first pipe 215 (tap water flows along the first pipe 215). Figure 2 At this time, since the water pump 3 is running, a negative pressure is formed at the second water outlet 214, and the condensed water in the condensed water box 11 can be sucked into the water pump 3 (the condensed water flows along the Figure 2 The condensed water flows in the direction indicated by the arrow A2 in the middle of the water heater (flowing in the direction indicated by the arrow A2 in the middle of the water heater), and then flows into the hot water pipe 100, thereby draining the condensed water. The condensed water treatment device for a gas water heater provided by the present invention collects the condensed water in the condensing heat exchanger 7 by providing a condensed water collection assembly 1, and then drains the condensed water into the hot water pipe 100 through the cooperation of the control valve assembly 2 and the water pump 3. The user does not need to separately dispose of the condensed water, and the user experience is better. At the same time, by providing the control valve assembly 2, the gas water heater can also operate in the shower mode using the same water pump 3, resulting in a simple and compact structure.

[0059] Optionally, the water inlet end of the hot water pipe 100 is provided with a first interface and a second interface, the first interface is connected to the first water outlet 212, and the second interface is connected to the second water outlet 214, and the water pump 3 is installed between the second interface and the second water outlet 214. When the bypass valve 22 is closed, the water pump 3 can generate a greater negative pressure at the second water outlet 214 when it is running, which is conducive to the smooth discharge of condensed water.

[0060] Optionally, a first one-way valve 13 and / or a second one-way valve 23 are further included. The first one-way valve 13 is installed between the second water inlet 213 and the water outlet port 114 to control the direction of water flow from the water outlet port 114 to the second water inlet 213, thereby preventing water from entering the condensed water box 11. The second one-way valve 23 is installed between the first water outlet 212 and the first interface to control the direction of water flow from the second water outlet 214 to the first interface, thereby preventing water in the hot water pipe 100 from flowing back into the valve body 21.

[0061] Optionally, a flow limiting valve 24 is also included between the first water outlet 212 and the first interface, which helps to enhance the ability of water to pump out condensed water by limiting the water flow in the first pipe 215, offset the impact of the tap water pressure in part or the first pipe 215 on the water pump 3, and reduce the demand for the head of the water pump 3, thereby reducing product costs to a certain extent.

[0062] Optionally, a water flow sensor 5 is provided at the water inlet end of the hot water pipe 100 , and the water flow sensor 5 is located downstream of the first interface and the second interface. The water flow sensor 5 is used to detect the water flow in the hot water pipe 100 .

[0063] Optionally, the condensed water collection assembly further includes a neutralizing filter element 12 disposed in the condensed water box 11 , and the neutralizing filter element 12 is used to neutralize the condensed water in the condensed water box 11 so that the acidic condensed water can be discharged into the hot water pipe 100 after being neutralized.

[0064] Optionally, the water inlet port 111 is arranged at the upper end of the condensate water box 11, and the water outlet port 114 is arranged at the lower end of the condensate water box 11. The lower end of the condensate water box 11 has an installation opening. The neutralization filter element 12 includes a filter housing 121 and filter material 122 arranged in the filter housing 121. A plurality of permeable mesh holes 123 are opened on the filter housing 121. The condensed water flows into the filter material 122 in the filter housing 121 through the permeable mesh holes 123 for neutralization. The bottom end of the filter housing 121 can block the installation opening and be detachably connected to the surrounding side of the installation opening to facilitate the disassembly, assembly and replacement of the filter element 12 in the condensate water box 11.

[0065] Optionally, the neutralizing filter element 12 further includes a filter screen 124 arranged on the peripheral side of the filter housing 121 , and the condensed water neutralized by the filter material 122 flows out to the outside of the filter element 12 through the filter screen 124 , and then is discharged to the second pipe 216 through the outlet end.

[0066] Optionally, a first connecting flange is provided on the condensate box 11 and is located on the peripheral side of the installation opening. A second flange 125 corresponding to the first flange 113 is provided on the peripheral side of the filter housing 121. The first flange 113 and the second flange 125 are connected by screws 15, thereby realizing the connection and installation between the condensate box 11 and the filter housing 121.

[0067] Optionally, a sealing ring 14 is further included. The sealing ring 14 is disposed between the filter housing 121 and the installation opening to seal the gap between the filter housing 121 and the installation opening to prevent condensed water from flowing out through the gap.

[0068] Optionally, an upper liquid level sensor 112 and a lower liquid level sensor 115 are further included. The upper liquid level sensor 112 is arranged at the upper part of the condensate box 11, and the lower liquid level sensor 115 is arranged at the lower part of the condensate box 11 and higher than the water outlet port 114 to ensure that the condensate in the condensate box 11 can be discharged from the water outlet port 114. At the same time, when the water pump 3 is used to discharge the condensate, the flue gas in the condensate box 11 will not be discharged into the hot water pipe 100 through the water outlet port 114, thereby achieving a liquid sealing effect.

[0069] Furthermore, the water outlet port 114 is opened on one side of the condensed water box 11 and is arranged higher than the installation opening.

[0070] Optionally, a first connecting pipe 4 is further included, and the first water outlet 212 and the first interface are connected through the first connecting pipe 4.

[0071] Example 2

[0072] Please refer to Figure 6 The difference between Example 2 and Example 1 is that it further includes a plug 17, and a bottom shell 18 is further provided at the lower end of the filter housing 121. The bottom shell 18 is detachably connected to the peripheral side of the installation opening, and a drainage channel 16 is provided on the bottom shell 18. The upper end of the drainage channel 16 is provided with a sewage inlet 161, and the lower end of the drainage channel 16 is provided with a sewage outlet 162. The sewage inlet 161 is higher than the installation opening and the distance from the installation opening is H1. The height of the condensed water box 11 is H2. The plug 17 is provided in the sewage outlet 162 for sealing and opening the sewage outlet 162. When the water pump 3 fails and cannot discharge the condensed water in the condensed water box 11 in time, the user can manually pull out the plug 17 to allow the condensed water to be discharged through the sewage outlet 162. The drainage channel 16 is provided to form a liquid seal height of H1 within the condensate box 11, preventing the flue gas in the condensing heat exchanger 7 from being discharged through the sewage outlet 162 of the condensate box 11 assembly. To ensure that the pressure strength of the liquid seal height can withstand the flue gas pressure strength of the gas water heater, H2>H1≥250mm.

[0073] Specifically, a liquid seal height of 300 mm can withstand a gas pressure of 300 Pa. The maximum gas pressure of the flue gas generated by a general gas water heater generally does not exceed 300 Pa. Those skilled in the art can set different H1s for different gas water heaters within the range of H2>H1≥250 mm.

[0074] Furthermore, the second connecting flange is provided on the peripheral side of the bottom shell 18 .

[0075] On the other hand, the present invention provides a gas water heater, including a controller 6, a gas heat exchanger 200, a condensing heat exchanger 7 connected to the smoke outlet of the gas heat exchanger 200, and a condensed water treatment device of the above-mentioned gas water heater. The hot water pipe 100 is arranged to pass through the condensing heat exchanger 7 and the gas heat exchanger 200 in sequence. The controller 6 is communicated with the gas heat exchanger 200, the bypass valve 22 and the water pump 3. The condensing heat exchanger 7 is also provided with a smoke outlet 72.

[0076] Specifically, the high-temperature flue gas generated in the gas heat exchanger 200 is Figure 1 The water flows into the condensing heat exchanger 7 in the direction indicated by the middle arrow B, and preheats the water in the hot water pipe 100 located in the condensing heat exchanger 7.

[0077] Optionally, a preheating return pipe is further included, one end of which is connected to the water outlet of the hot water pipe 100, and the other end is connected to the first water inlet 211. By providing the preheating return pipe, the gas water heater can run a circulating preheating function.

[0078] Furthermore, when the gas water heater performs the circulation preheating function or the boosting function, the second one-way valve 23 can prevent the water in the hot water pipe 100 from flowing back to the second water outlet 214 through the first water outlet 212, causing the water flow to be unable to circulate preheating or boosting.

[0079] Furthermore, when the gas water heater only wants to circulate the preheating function or the boosting function, the water flows along Figure 5 Flow in the direction of arrow A1.

[0080] Optionally, a second connecting pipe 8 is further included, and the water receiving port 111 is connected to the condensed water outlet via the second connecting pipe 8 .

[0081] Optionally, the condensing heat exchanger 7 is arranged higher than the condensing water box 11, and the condensing water outlet is opened at the bottom of the condensing heat exchanger 7, so that the condensing water in the condensing heat exchanger 7 can drip into the condensing water box 11 through the second connecting pipe 8 under the action of gravity.

[0082] Optionally, the flue gas outlet 72 is opened at the upper end of the condensing heat exchanger 7 to reduce the flue gas from flowing into the condensed water box 11 through the second connecting pipe 8 .

[0083] Please refer to Figure 7 In another aspect, the present invention provides a method for operating the gas water heater as described above, comprising the following steps:

[0084] S1: The gas water heater is in the bathing standby state, and the bypass valve 22 is opened;

[0085] S2: Determine whether L1>L0. If so, go to S3; if not, return to S1.

[0086] S3: Run bathing mode;

[0087] S4: Detecting the condensed water level in the condensed water box 11 using the upper liquid level sensor 112, and determining whether the condensed water level in the condensed water box 11 is higher than a first preset position through the controller 6. If so, it indicates that the condensed water in the condensed water box 11 has accumulated to a preset amount of water, and the process then proceeds to S5. If not, the process returns to S3.

[0088] S5: Close the bypass valve 22 and start the water pump 3;

[0089] S6: Using the lower liquid level sensor 115 to detect the condensed water level in the condensed water box 11, the controller 6 determines whether the condensed water level in the condensed water box 11 is lower than the second preset position. If so, it means that most of the condensed water in the condensed water box 11 has been pumped out of the hot water pipe 100, and then the process proceeds to S7;

[0090] S7: Turn off the water pump 3, open the bypass valve 22, and then return to S2;

[0091] Among them, L1 is the real-time water flow of the hot water pipe 100, and L0 is the startup water flow.

[0092] Optionally, the following steps are further included between S5 and S6:

[0093] Start timing T1;

[0094] In S6, if the condensed water level in the condensed water box 11 is higher than the second preset position, the following steps are performed:

[0095] S61: Determine whether T1 = T0. If so, proceed to S62. If not, return to S6.

[0096] S62: The upper liquid level sensor 112 is used to detect the condensed water level in the condensed water box 11, and the controller 6 determines whether the condensed water level in the condensed water box 11 is lower than the first preset position. If so, the process proceeds to S7. If not, it indicates that the water pump 3 has failed. In this case, the engine is shut down, the water pump 3 is turned off, the bypass valve 22 is opened, and a drainage failure alarm is issued.

[0097] T0 is a preset drainage time. Specifically, T0 is set according to the volume of the condensed water box 11 and the lift of the water pump 3.

[0098] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A condensate treatment device for a gas water heater, characterized in that: include: A condensed water collection assembly (1) comprises a condensed water box (11), wherein the condensed water box (11) is provided with a water receiving port (111) and a water outlet port (114), wherein the water receiving port (111) is in communication with a condensed water outlet (71) of a condensing heat exchanger (7) of a gas water heater, and the water receiving port (111) is arranged higher than the water outlet port (114); A control valve assembly (2) comprises a valve body (21) and a bypass valve (22), wherein the valve body (21) comprises a first pipe (215) and a second pipe (216), wherein the bypass valve (22) is arranged between the first pipe (215) and the second pipe (216), and wherein the bypass valve (22) is used to control the on-off between the first pipe (215) and the second pipe (216), wherein one end of the first pipe (215) is provided with a first water inlet (211), and the other end of the first pipe (215) is provided with a first water outlet (212). The first water inlet (211) is connected to a water supply pipe outside the gas water heater, the first water outlet (212) is connected to the water inlet end of the hot water pipe (100) of the gas water heater, one end of the second pipe (216) is provided with a second water inlet (213), the other end of the second pipe (216) is provided with a second water outlet (214), the second water inlet (213) is connected to the water outlet port (114), and the second water outlet (214) is connected to the water inlet end of the hot water pipe (100); A water pump (3) is installed at the water inlet end of the hot water pipe (100).

2. The condensed water treatment device for a gas water heater according to claim 1, characterized in that: The water inlet end of the hot water pipe (100) is provided with a first interface and a second interface, the first interface is connected to the first water outlet (212), the second interface is connected to the second water outlet (214), and the water pump (3) is installed between the second interface and the second water outlet (214).

3. The condensed water treatment device for a gas water heater according to claim 2, characterized in that: Also includes: a first one-way valve (13) installed between the second water inlet (213) and the water outlet (114) to control the direction of water flow from the water outlet to the second water inlet (213); and / or A second one-way valve (23) is installed between the first water outlet (212) and the first interface to control the direction of water flow from the second water outlet (212) to the first interface.

4. The condensate treatment device for a gas water heater according to claim 2, characterized in that: It also includes a flow limiting valve (24) arranged between the first water outlet (212) and the first interface.

5. The condensate treatment device for a gas water heater according to claim 2, characterized in that: It also includes a water flow sensor (5) arranged at the water inlet end of the hot water pipe (100), and the water flow sensor (5) is located downstream of the first interface and the second interface.

6. The condensate treatment device for a gas water heater according to any one of claims 1 to 5, characterized in that: The condensed water collection assembly (1) further comprises a neutralization filter element (12) arranged in the condensed water box (11), and the neutralization filter element (12) is used to neutralize the condensed water in the condensed water box (11).

7. The condensate treatment device for a gas water heater according to claim 6, characterized in that: The water receiving port (111) is arranged at the upper end of the condensed water box (11), and the water outlet port (114) is arranged at the lower end of the condensed water box (11). The lower end of the condensed water box (11) has an installation opening. The neutralization filter element (12) includes a filter housing (121) and filter material (122) arranged in the filter housing (121). A plurality of water-permeable mesh holes (123) are provided on the filter housing (121). The bottom end of the filter housing (121) can block the installation opening and is detachably connected to the peripheral side of the installation opening.

8. The condensate treatment device for a gas water heater according to claim 7, characterized in that: The filter housing (121) further comprises a plug (17). The lower end of the filter housing (121) is further provided with a bottom shell (18). The bottom shell (18) is detachably connected to the bearing housing of the mounting opening. A drainage channel (16) is provided on the bottom shell (18). The upper end of the drainage channel (16) is provided with a sewage inlet (161). The lower end of the drainage channel (16) is provided with a sewage outlet (162). The sewage inlet (161) is higher than the mounting opening and the distance from the mounting opening is H1. The height of the condensed water box (11) is H2. The plug (17) is provided in the sewage outlet (162) for blocking and opening the sewage outlet (162). H2>H1≥250mm.

9. The condensate treatment device for a gas water heater according to claim 6, characterized in that: It also includes an upper liquid level sensor (112) and a lower liquid level sensor (115), wherein the upper liquid level sensor (112) is arranged at the upper part of the condensed water box (11), and the lower liquid level sensor (115) is arranged at the lower part of the condensed water box (11) and is higher than the water outlet port (114).

10. A gas water heater, characterized in that: The invention comprises a controller (6), a gas heat exchanger (200), a condensing heat exchanger (7) connected to the smoke outlet of the gas heat exchanger (200), and a condensed water treatment device of a gas water heater according to any one of claims 1 to 9, wherein the hot water pipe (100) passes through the condensing heat exchanger (7) and the gas heat exchanger (200) in sequence, the controller (6) is communicatively connected with the gas heat exchanger (200), the bypass valve (22) and the water pump (3), and a smoke outlet (72) is also provided on the condensing heat exchanger (7).

11. The gas water heater according to claim 10, characterized in that: It also includes a preheating return pipe, one end of which is connected to the water outlet end of the hot water pipe (100), and the other end of which is connected to the first water inlet (211).

12. An operating method of a gas water heater according to claim 11, characterized in that: The following steps are involved: S1: The gas water heater is in a bathing standby state, and the bypass valve (22) is opened; S2: Determine whether L1>L0. If so, go to S3; if not, return to S1. S3: Run bathing mode; S4: determining whether the condensed water level in the condensed water box (11) is higher than a first preset position, if so, proceeding to S5, if not, returning to S3; S5: closing the bypass valve (22) and starting the water pump (3); S6: judging whether the condensed water level in the condensed water box (11) is lower than a second preset position, and if so, proceeding to S7; S7: Turn off the water pump (3), open the bypass valve (22), and then return to S2; Wherein, L1 is the real-time water flow of the hot water pipe (100), and L0 is the startup water flow.

13. The operating method of the gas water heater according to claim 12, characterized in that: Between S5 and S6 The following steps are involved: Start timing T1; In S6, if the condensed water level in the condensed water box (11) is higher than the second preset position, the following steps are performed: S61: Determine whether T1 = T0. If so, proceed to S62. If not, return to S6. S62: determining whether the condensate level in the condensate box (11) is lower than the first preset position; if so, proceeding to S7; if not, shutting down the engine, turning off the water pump (3), opening the bypass valve (22), and issuing a drainage failure alarm; Among them, T0 is the preset drainage time.

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