A residual chlorine removal device, gas water heater and operation method thereof

Abstract

The application discloses a residual chlorine removal device, a gas water heater and an operation method thereof. The residual chlorine removal device comprises a water flow sensing device installed on a main water pipe of the gas water heater and used for detecting the water flow of the main water pipe; a residual chlorine detection assembly connected with the main water pipe and used for detecting the residual chlorine content of tap water in a water supply pipeline outside the gas water heater entering the main water pipe; a residual chlorine removal assembly comprising a first branch and a second branch and being arranged in parallel in the main water pipe of the gas water heater and located at the rear end of the water flow sensing device and the residual chlorine detection assembly; a chlorine removal structure arranged in the second branch; and a shunt assembly comprising a shunt cavity and a shunt device and used for adjusting the opening degree of the water inlet of the first branch and the second branch. The residual chlorine removal device can solve the problem of rapid consumption of residual chlorine removal filter material caused by the fact that all water flows through the residual chlorine removal structure in the prior art, and effectively prolongs the service life of the filter material in the chlorine removal structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, and in particular to a residual chlorine removal device, a gas water heater and an operation method thereof. BACKGROUND

[0002] Chlorine disinfection is widely used in tap water disinfection process as a cheap and effective way. In order to ensure the disinfection of water transmission process, a certain amount of residual chlorine needs to be retained in the pipe network terminal water. Long-term contact with high concentration of residual chlorine can cause skin itching and irritation, and residual chlorine combined with organic matter can produce carcinogenic substances such as chloroform, which is harmful to the human body. The activated carbon filter material is commonly used in the market to remove residual chlorine, which also has good removal effect on low concentration of residual chlorine. However, the activated carbon filter material under the straight-through structure has a short service life.

[0003] Therefore, there is an urgent need for a residual chlorine removal device to solve the above problems. SUMMARY

[0004] The present application aims to at least solve one of the problems existing in the prior art, and for this purpose, the present application provides a residual chlorine removal device, which can solve the problem of rapid consumption of residual chlorine removal filter material caused by the fact that all water flows through the residual chlorine removal structure in the prior art, effectively prolonging the service life of the filter material in the chlorine removal structure.

[0005] The above-mentioned purpose is achieved by the following technical solutions:

[0006] A residual chlorine removal device, comprising:

[0007] A water flow sensing device installed on the main water pipe of the gas water heater for detecting the water flow of the main water pipe;

[0008] A residual chlorine detection assembly connected with the main water pipe for detecting the residual chlorine content of tap water entering the main water pipe from the water supply pipeline outside the gas water heater;

[0009] A residual chlorine removal assembly, comprising:

[0010] A first branch and a second branch are arranged in parallel in the main water pipe of the gas water heater and located at the rear end of the water flow sensing device and the residual chlorine detection assembly;

[0011] A chlorine removal structure arranged in the second branch;

[0012] A shunt assembly comprising a shunt cavity and a shunt, the shunt cavity being in communication with the main water pipe, the first branch and the second branch, and the shunt being arranged in the shunt cavity for adjusting the opening degree of the water inlet of the first branch and the second branch;

[0013] The water flow sensing device, the residual chlorine detection component and the residual chlorine removal component are in communication connection with a controller of the gas water heater.

[0014] Optionally, the flow divider comprises a driving structure and a plug structure, the plug structure is arranged at an output end of the driving structure and located in the flow dividing cavity, and the driving structure is capable of driving the plug structure to move in the flow dividing cavity to adjust the opening degree of the water inlets of the first branch and the second branch.

[0015] Optionally, the plug structure comprises:

[0016] a screw rod, which is installed at an output end of the driving structure;

[0017] a first plug, which is arranged at one end of the screw rod;

[0018] a second plug, which is arranged at the other end of the screw rod;

[0019] When the driving structure drives the screw rod to move in a first direction, the first plug moves towards the direction close to the water inlet of the first branch, and the second plug moves towards the direction away from the water inlet of the second branch; when the driving structure drives the screw rod to move in a second direction, the first plug moves towards the direction away from the water inlet of the first branch, and the second plug moves towards the direction close to the water inlet of the second branch.

[0020] Optionally, the driving structure comprises:

[0021] a driving member, which is installed in a housing of the gas water heater;

[0022] a transmission member, one end of which is installed at an output end of the driving member, and the other end of which extends into the flow dividing cavity and is in threaded transmission connection with the screw rod.

[0023] Optionally, the residual chlorine removal component further comprises a sealing member, which is arranged between the transmission member and the flow dividing cavity.

[0024] Another aspect of the present application provides a gas water heater, which comprises a housing, a main water pipe arranged in the housing and a controller, and further comprises the residual chlorine removal device.

[0025] Optionally, the gas water heater further comprises an operation display in communication connection with the controller, and the operation display is provided with a residual chlorine removal function button.

[0026] The present application provides a first operation method of the gas water heater, which comprises the following steps:

[0027] S1: the gas water heater is in a bathing standby mode;

[0028] S2: judging whether the water flow is greater than the start-up flow, if yes, entering S3;

[0029] S3: running the normal shower mode, and judging whether the user starts the residual chlorine removal function, if yes, entering S4, if no, maintaining the normal shower mode;

[0030] S4: the residual chlorine detection component samples and detects the residual chlorine concentration C of the main water pipe 样 , calculates the water flow L1 of the second branch, L1=(C 样 -C 目 ) x L 主 / C 滤 , and adjusts the residual chlorine removal device according to L1, and further adjusts the opening degree of the water inlet of the first branch and the second branch;

[0031] Wherein, C 目 is the target residual chlorine concentration, L 主 is the water flow of the main water pipe, and C 滤 is the residual chlorine concentration that can be filtered by the chlorine removal structure;

[0032] S5: judging whether the residual chlorine removal function is closed, if yes, entering S6, if no, maintaining the current state of the residual chlorine removal device;

[0033] S6: judging whether the water flow is greater than the start-up flow, if yes, returning to S1, if no, returning to S3.

[0034] Optionally, S4 and S5 further comprise S41: judging whether L1 is greater than or equal to L 主 , if yes, adjusting the residual chlorine removal device to the maximum opening degree of the water inlet of the second branch, if no, maintaining the current state of the residual chlorine removal device.

[0035] The second running method of the gas water heater provided by the application comprises the following steps:

[0036] S1: the gas water heater is in a bathing standby mode;

[0037] S2: judging whether the water flow is greater than the start-up flow, if yes, entering S3;

[0038] S3: running the normal shower mode, and judging whether the user starts the residual chlorine removal function, if yes, entering S4, if no, maintaining the normal shower mode;

[0039] S4: the residual chlorine detection component samples and detects the residual chlorine concentration C of the main water pipe 样 , obtains the residual chlorine amount M filtered by the chlorine removal structure after the last shower 滤0 , and calculates the residual chlorine concentration C 滤0C 滤0 =(M 总 -M 滤0 ) / a, calculate the water flow rate L1 of the second branch, L1 = (C 样 -C 目 )ⅹL 主 / C 滤0 The residual chlorine removal device is adjusted according to L1, thereby adjusting the opening of the inlet of the first branch and the second branch, and the filtration time t is recorded.

[0040] S5: Determine whether the dechlorination function is turned off. If yes, proceed to S6. If no, maintain the current state of the residual chlorine removal device.

[0041] S6: Calculate the residual chlorine amount M filtered by the dechlorination structure in the current stage. 滤 M 滤 =M 滤0 +C 滤0 xL1xt, and M 滤 The chlorine removal structure described in the previous shower has been updated to filter out residual chlorine M. 滤0 At the same time, the filtering duration t is reset to zero;

[0042] S7: Determine if the water flow rate is greater than the startup flow rate. If yes, return to S1; otherwise, return to S3.

[0043] This invention provides a third method for operating a gas water heater as described above, comprising the following steps:

[0044] S1: The gas water heater is in shower standby mode;

[0045] S2: Determine if the water flow rate is greater than the startup flow rate. If so, proceed to S3.

[0046] S3: Run the normal shower mode and determine whether the user has activated the residual chlorine removal function. If yes, proceed to S4; otherwise, maintain the normal shower mode.

[0047] S4: The residual chlorine detection component samples and detects the residual chlorine concentration C in the main water pipe. 样 The amount of residual chlorine (M) filtered by the dechlorination structure after the previous shower is obtained. 滤0 Calculate the residual chlorine concentration C that the dechlorination structure can filter after the previous shower. 滤0 C 滤0 =(M 总 -M 滤0 ) / a, calculate the water flow rate L1 of the second branch, L1 = (C 样 -C 目 )ⅹL 主 / C 滤0The residual chlorine removal device is adjusted according to L1, thereby adjusting the opening of the inlet of the first branch and the second branch, and the filtration time t is recorded.

[0048] S5: Determine if the dechlorination function is off. If not, proceed to S7; if yes, proceed to S8.

[0049] S7: Determine whether the filtration time t = the set time T. If yes, proceed to S8. If no, maintain the current state of the residual chlorine removal device.

[0050] S8: Calculate the residual chlorine amount M filtered by the dechlorination structure in the current stage. 滤 M 滤 =M 滤0 +C 滤0 xL1xt, and M 滤 The chlorine removal structure described in the previous shower has been updated to filter out residual chlorine M. 滤0 At the same time, the filtering duration t is reset to zero;

[0051] S9: Determine if the water flow rate is greater than the startup flow rate. If yes, return to S1; otherwise, return to S3.

[0052] Compared with the prior art, the present invention has at least the following beneficial effects:

[0053] The residual chlorine removal device provided by this invention can adjust the water flow rate entering the second branch for residual chlorine removal operation according to the residual chlorine content of the tap water entering the main water pipe. Specifically, when the residual chlorine concentration of the tap water entering the main water pipe is low, the water flow rate entering the second branch for residual chlorine removal operation is reduced accordingly (when the residual chlorine concentration is low, the impact on the user is small or negligible, so a low residual chlorine concentration method can be used to achieve water supply for gas water heaters). This solves the problem of rapid wear of residual chlorine removal filter media caused by all water flowing through the residual chlorine removal structure in the prior art, and effectively extends the life of the filter media in the residual chlorine removal structure. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of a gas water heater provided in a specific embodiment of the present invention;

[0055] Figure 2 This is a schematic diagram of the structure of the residual chlorine removal component of the gas water heater provided in a specific embodiment of the present invention (the plug structure is located in the middle position between the inlet of the first branch and the inlet of the second branch);

[0056] Figure 3 This is a schematic diagram of the structure of the residual chlorine removal component of the gas water heater provided in a specific embodiment of the present invention (the plug structure is located at the position of sealing the inlet of the second branch);

[0057] Figure 4is a structural schematic view of a residual chlorine removing assembly of a gas water heater provided by specific embodiments of the present application (plug structure is located at a position of blocking a water inlet of the first branch);

[0058] Figure 5 is a first running method step chart of a gas water heater provided by specific embodiments of the present application;

[0059] Figure 6 is a second running method step chart of a gas water heater provided by specific embodiments of the present application;

[0060] Figure 7 is a third running method step chart of a gas water heater provided by specific embodiments of the present application.

[0061] In the figure:

[0062] 1, a casing;

[0063] 2, a residual chlorine removing assembly; 21, a first branch; 22, a second branch; 23, a chlorine removing structure; 24, a driving structure; 241, a driving member; 242, a transmission member; 25, a plug structure; 251, a first plug; 252, a second plug; 253, a screw rod;

[0064] 3, a water flow sensing device;

[0065] 4, a residual chlorine detecting assembly;

[0066] 5, a main water pipe;

[0067] 6, an operation display;

[0068] 7, a controller;

[0069] 8, a heat exchanger. DETAILED DESCRIPTION

[0070] The following embodiments are used to illustrate the present application, but the present application is not limited by these embodiments. Modifications to the specific embodiments of the present application or equivalent replacements to some technical features without departing from the spirit of the present application should be covered in the technical solution range of the present application.

[0071] Please refer to Figures 1-4The application provides a gas water heater, which comprises a shell 1, a main water pipe 5, a heat exchanger 8 and a controller 7 arranged in the shell 1, and further comprises a residual chlorine removal device, wherein the residual chlorine removal device comprises a water flow sensing device 3, a residual chlorine detection assembly 4 and a residual chlorine removal assembly 2. The water flow sensing device 3 is arranged on the main water pipe 5 of the gas water heater and is used for detecting the water flow of the main water pipe 5. The residual chlorine detection assembly 4 is connected with the main water pipe 5 and is used for detecting the residual chlorine content of tap water in a water supply pipeline outside the gas water heater and entering the main water pipe 5. The residual chlorine removal assembly 2 comprises a first branch 21, a second branch 22, a residual chlorine removal structure 23 and a flow distribution assembly. The first branch 21 and the second branch 22 are arranged in parallel in the main water pipe 5 of the gas water heater and are located at the rear end of the water flow sensing device 3 and the residual chlorine detection assembly 4. The residual chlorine removal structure 23 is arranged in the second branch 22. The flow distribution assembly comprises a flow distribution cavity and a flow distributor, the flow distribution cavity is connected with the main water pipe 5, the first branch 21 and the second branch 22, and the flow distributor is arranged in the flow distribution cavity and is used for adjusting the opening degree of the water inlet of the first branch 21 and the second branch 22. The water flow sensing device 3, the residual chlorine detection assembly 4 and the residual chlorine removal assembly 2 are in communication connection with the controller 7 of the gas water heater.

[0072] The residual chlorine removal device can adjust the water flow entering the second branch 22 for residual chlorine removal operation according to the residual chlorine content of tap water entering the main water pipe 5, specifically, when the residual chlorine content of tap water entering the main water pipe 5 is low, the water flow entering the second branch 22 for residual chlorine removal operation is reduced accordingly (the influence on the user is small or negligible when the residual chlorine content is low, so the gas water heater can be supplied with water with low residual chlorine content), thereby solving the problem of rapid consumption of residual chlorine removal filter material caused by the fact that all water flows through the residual chlorine removal structure in the prior art, and effectively prolonging the service life of the filter material in the residual chlorine removal structure 23.

[0073] Specifically, the specific operation method of the gas water heater provided by the embodiment has the following three kinds:

[0074] Please refer to Figure 5 The first operation method comprises the following steps:

[0075] S1: the gas water heater is in a bathing standby mode;

[0076] S2: it is judged whether the water flow is greater than the starting flow, if yes, S3 is entered;

[0077] S3: a normal shower mode is run, and it is judged whether the user starts the residual chlorine removal function, if yes, S4 is entered, and if not, the normal shower mode is maintained;

[0078] S4: the residual chlorine detection assembly 4 samples and detects the residual chlorine concentration Csample of the main water pipe 5, calculates the water flow L1 of the second branch 22, L1=(C 样 -C目 )ⅹL 主 / C 滤 , and the opening degree of the water inlet of the first branch 21 and the second branch 22 is adjusted according to the L1;

[0079] wherein, C 目 is the target residual chlorine concentration, Lmainis the water flow of the main water pipe 5, C 滤 is the residual chlorine concentration that can be filtered by the chlorine removal structure 23;

[0080] S5: judging whether the chlorine removal function is closed, if yes, entering S6, if no, maintaining the current state of the residual chlorine removal device;

[0081] S6: judging whether the water flow > the start-up flow, if yes, returning to S1, if no, returning to S3.

[0082] It should be noted that C 滤 is a fixed value, that is, the filtering capacity of the filter material in the chlorine removal structure 23 is basically consistent within the preset service life. For example, the filter material in the chlorine removal structure 23 is a large amount (about 2KG) of KDF55, and the filtering capacity of the KDF55 is very small in the preset time relative to the water flow of the bath water, which can be approximately represented by a fixed value. The KDF55 is a copper-zinc alloy composed of 50% copper and 50% zinc.

[0083] In addition, C 目 is a fixed value or can be set by the controller 7, and is generally 0.05-3.0 mg / L.

[0084] Alternatively, S4 and S5 further include S41: judging whether L1≥L 主 , if yes, adjusting the residual chlorine removal device to the maximum opening degree of the water inlet of the second branch 22, if no, maintaining the current state of the residual chlorine removal device. Because generally L1 主 , when the calculated L1≥L 主 , it indicates that the residual chlorine content concentration of the tap water entering the main water pipe 5 is high at this time, and the entire water flow needs to be filtered, so the residual chlorine removal device is directly adjusted to the maximum opening degree of the water inlet of the second branch 22, so as to facilitate the smooth flow of the water flow.

[0085] Please refer to Figure 6 , the second operating method includes the following steps:

[0086] S1: the gas water heater is in the bathing standby mode;

[0087] S2: judging whether the water flow > the start-up flow, if yes, entering S3;

[0088] S3: Run the normal shower mode and determine whether the user has activated the residual chlorine removal function. If yes, proceed to S4; otherwise, maintain the normal shower mode.

[0089] S4: Residual chlorine detection component 4 samples and detects the residual chlorine concentration C in the main water pipe 5. 样 Obtain the residual chlorine amount Mfilter after the previous shower using dechlorination structure 23, and calculate the residual chlorine concentration C that can be filtered by dechlorination structure 23 after the previous shower. 滤0 C 滤0 =(M 总 -M 滤0 ) / a, calculate the water flow rate L1 of the second branch 22, L1=(C 样 -C 目 )ⅹL 主 / C 滤0 The residual chlorine removal device is adjusted according to L1, which in turn adjusts the opening of the inlet of the first branch 21 and the second branch 22, and the filtration time t is recorded.

[0090] S5: Determine whether the dechlorination function is off. If yes, proceed to S6. If no, maintain the current state of the residual chlorine removal device.

[0091] S6: Calculate the residual chlorine level M of the current stage of dechlorination structure 23. 滤 M 滤 =M 滤0 +C 滤0 xL1xt, and M 滤 Updated to the previous shower dechlorination structure 23, with a filtered residual chlorine level of M. 滤0 At the same time, the filtering duration t is reset to zero;

[0092] S7: Determine if the water flow rate is greater than the startup flow rate. If yes, return to S1; otherwise, return to S3.

[0093] The second operating mode addresses the situation where the filter media in the dechlorination structure 23 decreases as the filtered water flow increases. By continuously updating the remaining amount of filter media, a more precise water flow through the second branch 22 is obtained, thereby ensuring the reliability of the residual chlorine removal function.

[0094] Optionally, S41 is also included between S4 and S5: determine whether L1≥L 主 If so, adjust the inlet of the residual chlorine removal device to its maximum opening on the second branch 22; otherwise, maintain the current state of the residual chlorine removal device. This is because, generally, L1 < L... 主 When the calculated L1≥L 主 If the concentration of residual chlorine in the tap water entering the main water pipe 5 is high, it means that the entire water flow needs to be filtered. In this case, the residual chlorine removal device should be adjusted to the maximum opening of the inlet of the second branch 22 to facilitate smooth water flow.

[0095] Please refer to Figure 7 , the third operating method, comprising the following steps:

[0096] S1: the gas water heater is in bath standby mode;

[0097] S2: determine whether the water flow > start-up flow, if yes, go to S3;

[0098] S3: run the normal shower mode, while determining whether the user starts the residual chlorine removal function, if yes, go to S4, if not, maintain the normal shower mode;

[0099] S4: the residual chlorine detection assembly 4 samples and detects the residual chlorine concentration C of the main water pipe 5 样 , obtains the residual chlorine amount M filtered by the residual chlorine removal structure 23 after the last shower 滤0 , calculates the residual chlorine concentration C that can be filtered by the residual chlorine removal structure 23 after the last shower 滤0 , C 滤0 =(M 总 -M 滤0 ) / a, calculates the water flow L1 of the second branch 22, L1=(C 样 -C 目 )ⅹL 主 / C 滤0 , adjusts the residual chlorine removal device according to L1, and further adjusts the opening degree of the water inlet of the first branch 21 and the second branch 22, and records the filtering time t;

[0100] S5: determine whether the residual chlorine removal function is closed, if not, go to S7, if yes, go to S8;

[0101] S7: determine whether the filtering time t = set time T, if yes, go to S8, if not, maintain the current state of the residual chlorine removal device;

[0102] S8: calculate the residual chlorine amount M filtered by the residual chlorine removal structure 23 in the current stage 滤 , M 滤 =M 滤0 +C 滤0 ⅹL1ⅹt, and update M 滤 to the residual chlorine amount M filtered by the residual chlorine removal structure 23 after the last shower 滤0 , and clear the filtering time t;

[0103] S9: determine whether the water flow > start-up flow, if yes, return to S1, if not, return to S3.

[0104] Optionally, between S4 and S5, there is also S41: determine whether L1≥L 主If yes, the residual chlorine removal device is adjusted to the maximum opening of the water inlet of the second branch 22; if no, the current state of the residual chlorine removal device is maintained. Because generally L1 主 When the calculated L1≥L 主 When the calculated L1≥L

[0105] The third operating mode is also for the case that the filter material in the residual chlorine removal structure 23 is reduced with the increase of the water flow, and the residual chlorine removal function is ensured by continuously updating the residual amount of the filter material to obtain more accurate water flow through the second branch 22.

[0106] Optionally, one end of the residual chlorine detection assembly 4 is connected to the main water pipe 5 through a water inlet valve, and the other end of the residual chlorine detection assembly 4 is connected to the outside of the gas water heater through a water outlet valve. When sampling is needed, the water inlet valve is opened for a preset time, and a preset amount of water enters the residual chlorine detection assembly 4, and after the detection is completed, the water outlet valve is opened, and the water sample flows out of the gas water heater.

[0107] Optionally, the flow divider includes a driving structure 24 and a plug structure 25, the plug structure 25 is arranged at the output end of the driving structure 24 and located in the flow dividing cavity, and the driving structure 24 can drive the plug structure 25 to move in the flow dividing cavity to adjust the opening of the water inlets of the first branch 21 and the second branch 22. For example, as shown in Figure 2 , the plug structure 25 is located at the middle position between the water inlet of the first branch 21 and the water inlet of the second branch 22; as shown in Figure 3 , the plug structure 25 is located at the position of plugging the water inlet of the second branch 22; as shown in Figure 4 , the plug structure 25 is located at the position of plugging the water inlet of the first branch 21.

[0108] Optionally, the plug structure 25 includes a screw rod 253, a first plug 251 and a second plug 252. The screw rod 253 is installed at the output end of the driving structure 24. The first plug 251 is arranged at one end of the screw rod 253. The second plug 252 is arranged at the other end of the screw rod 253. When the driving structure 24 drives the screw rod 253 to move in the first direction, the first plug 251 moves towards the water inlet of the first branch 21, and the second plug 252 moves away from the water inlet of the second branch 22; when the driving structure 24 drives the screw rod 253 to move in the second direction, the first plug 251 moves away from the water inlet of the first branch 21, and the second plug 252 moves towards the water inlet of the second branch 22.

[0109] Optionally, the driving structure 24 comprises a driving member 241 and a transmission member 242. The driving member 241 is installed in the casing 1 of the gas water heater. One end of the transmission member 242 is installed at the output end of the driving member 241, and the other end extends into the flow dividing cavity and is threadedly connected with the screw rod 253. The driving member 241 drives the screw rod 253 to move through the transmission member 242.

[0110] In this embodiment, the driving member 241 is an electric motor, and the transmission member 242 is a rack transmission structure. The rack transmission structure is a prior art, and thus will not be described here.

[0111] Optionally, the residual chlorine removing assembly 2 further comprises a sealing member arranged between the transmission member 242 and the flow dividing cavity.

[0112] Optionally, an operation display 6 in communication with the controller 7 is further included, and a residual chlorine removing function button is arranged on the operation display 6.

[0113] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A method for operating a gas water heater, characterized in that, The gas water heater includes a casing (1), a main water pipe (5) installed inside the casing (1), a controller (7), and a residual chlorine removal device, wherein the residual chlorine removal device includes: A water flow sensor (3) is installed on the main water pipe (5) of the gas water heater to detect the water flow rate of the main water pipe (5); The residual chlorine detection component (4) is connected to the main water pipe (5) and is used to detect the residual chlorine content of the tap water entering the main water pipe (5) from the water supply pipe outside the gas water heater. The residual chlorine removal unit (2) includes: The first branch (21) and the second branch (22) are connected in parallel in the main water pipe (5) of the gas water heater and located at the rear end of the water flow sensing device (3) and the residual chlorine detection component (4); The dechlorination structure (23) is installed in the second branch (22); The diversion assembly includes a diversion chamber and a diverter. The diversion chamber is connected to the main water pipe (5), the first branch (21), and the second branch (22). The diverter is located in the diversion chamber and is used to adjust the opening of the inlets of the first branch (21) and the second branch (22). The water flow sensing device (3), the residual chlorine detection component (4), and the residual chlorine removal component (2) are all communicatively connected to the controller (7) of the gas water heater; The operation method of a gas water heater includes the following steps: S1: The gas water heater is in shower standby mode; S2: Determine if the water flow rate is greater than the startup flow rate. If so, proceed to S3. S3: Run the normal shower mode and determine whether the user has activated the residual chlorine removal function. If yes, proceed to S4; otherwise, maintain the normal shower mode. S4: The residual chlorine detection component (4) samples and detects the residual chlorine concentration C in the main water pipe (5). 样 Calculate the water flow rate L1 of the second branch (22), L1 = (C 样 -C 目 )ⅹL 主 / C 滤 And adjust the residual chlorine removal device according to L1, thereby adjusting the opening degree of the inlet of the first branch (21) and the second branch (22); Among them, C 目 For the target residual chlorine concentration, L 主 C represents the water flow rate of the main water pipe (5). 滤 The residual chlorine concentration that can be filtered by the dechlorination structure (23); S5: Determine whether the dechlorination function is turned off. If yes, proceed to S6. If no, maintain the current state of the residual chlorine removal device. S6: Determine if the water flow rate is greater than the start-up flow rate. If yes, return to S1; otherwise, return to S3. Between S4 and S5, S41 is further included: determining whether L1≥L 主 If yes, adjust the residual chlorine removal device to the maximum opening of the inlet of the second branch (22); otherwise, maintain the current state of the residual chlorine removal device.

2. The operating method of the gas water heater according to claim 1, characterized in that, The diverter includes a drive structure (24) and a plug structure (25). The plug structure (25) is disposed at the output end of the drive structure (24) and located in the diverting cavity. The drive structure (24) can drive the plug structure (25) to move in the diverting cavity to adjust the opening of the inlets of the first branch (21) and the second branch (22).

3. The operating method of the gas water heater according to claim 2, characterized in that, The plug structure (25) includes: A screw (253) is installed at the output end of the drive structure (24); The first plug (251) is disposed at one end of the screw (253); The second plug (252) is disposed at the other end of the screw (253); When the drive structure (24) drives the screw (253) to move in the first direction, the first plug (251) moves toward the inlet of the first branch (21), and the second plug (252) moves toward the inlet of the second branch (22); when the drive structure (24) drives the screw (253) to move in the second direction, the first plug (251) moves toward the inlet of the first branch (21), and the second plug (252) moves toward the inlet of the second branch (22).

4. The operating method of the gas water heater according to claim 3, characterized in that, The driving structure (24) includes: A drive unit (241) is installed inside the casing (1) of the gas water heater; The transmission component (242) has one end installed at the output end of the drive component (241) and the other end extending into the diversion cavity and threadedly connected to the screw (253).

5. The operating method of the gas water heater according to claim 4, characterized in that, The residual chlorine removal assembly (2) also includes a seal, which is disposed between the transmission member (242) and the diversion chamber.

6. The operating method of the gas water heater according to claim 1, characterized in that, It also includes an operation display (6) that is communicatively connected to the controller (7), and the operation display (6) is provided with a residual chlorine removal function button.

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