Control method of gas water heater

Abstract

The present invention discloses a control method for a gas water heater: after detecting an abnormality in a sectional valve, the current yield of the gas water heater is obtained; it is determined whether the yield is in the overlap area between the current failure section and a section with a yield lower than the current failure section; if it is in the overlap area, the sectional valve corresponding to the section with a yield lower than the current section is opened, and the gas water heater does not report a fault state; if it is not in the overlap area, combustion is carried out according to the maximum yield in the overlap area, the gas water heater reports a fault state, and after the user stops using water, the solenoid valve fault of the gas water heater is reported. Switching is performed based on the yield range to ensure that the gas water heater can operate normally even if the sectional valve is abnormal during use, thereby improving user experience and comfort. In view of the problem of low fault tolerance of the sectional valve, the sectional valve and the like can be repaired without affecting the normal use of the gas water heater, ensuring accurate correction of the gas water heater fault.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a control method for a gas water heater. Background Art

[0002] Household instantaneous gas water heaters control the amount of gas input by adjusting the opening and closing of a proportional valve, thereby controlling the output rate (rate = water flow rate * water temperature difference). Gas in the gas pipeline passes through the main valve and proportional valve, then through a sectional valve to the flame grate, where it mixes with air and burns. This method ensures a more even distribution of heat load on the flame grate. Gas water heaters typically have three or four stages of combustion control.

[0003] Take a three-stage gas water heater as an example: This type of water heater typically has two sectional valves corresponding to the three different stages. The first stage fire corresponds to a fire bar that is not connected to a sectional valve and is always open. The second stage fire is achieved by opening the fire bar corresponding to sectional valve 1 on top of the normally open fire bar. The third stage fire is achieved by opening the fire bars corresponding to sectional valves 1 and 2 on top of the normally open fire bar. During normal combustion, the opening and closing degrees of each proportional valve vary, resulting in different water heater yields. Different stages correspond to different yield ranges. For example, the yield range for the first stage fire is 500-1200, the yield range for the second stage fire is 800-2000, and the yield range for the third stage fire is 1300-3000.

[0004] While the water heater is operating, if a sectional valve malfunctions, such as a short circuit or open circuit in the sectional valve circuit, or a blockage in the gas valve, pipe, or grate, the water heater may experience flameout in some of the grate. These issues may also cause the system's set proportional valve opening and closing angle to deviate from the normal output, causing the outlet water temperature to deviate from the set temperature, affecting the user experience.

[0005] The main solution currently promoted in the industry is to directly report faults caused by abnormalities in the combustion state of the sectional valve. For example, after detecting abnormal operation of the sectional valve, a flameout fault will be reported, or an abnormal combustion condition fault will be reported. In other words, after such a fault occurs, the water heater system will stop running and the water heater will be directly in the "shutdown" state, affecting the user's daily use. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defect in the prior art that there is no emergency use technology after the sectional valve is abnormal, and to provide a control method for a gas water heater.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A method for controlling a gas water heater, comprising the following steps:

[0009] S1. After detecting an abnormality in the sectional valve, obtaining the current output rate of the gas water heater;

[0010] S2. Determine whether the yield is in a region where the current failure segment overlaps with a yield lower than the current failure segment;

[0011] If the current yield is in the overlapping area, the gas water heater opens the sectional valve corresponding to the segment with a yield lower than the current segment, and takes over the abnormal sectional valve for combustion, and the gas water heater does not report a fault state;

[0012] If the current yield is not in the overlap area, the gas water heater burns at the maximum yield in the overlap area, and the gas water heater reports a fault state. After the user stops using water, the solenoid valve of the gas water heater is reported to be faulty.

[0013] In the present invention, the above-mentioned control method is adopted to avoid a direct fault error and cessation of use when a sectional valve in the gas water heater is abnormal, which affects the user experience. The present invention can switch based on the yield range, and continue to burn by switching to another normal sectional valve to replace the abnormal sectional valve, thereby ensuring that the gas water heater can operate normally even if the sectional valve is abnormal during use, thereby improving the user experience and comfort. At the same time, in response to the problem of low fault tolerance of sectional valves in the prior art, the present invention can use the error information of the user after stopping use to repair the sectional valve and the like without affecting the normal use of the gas water heater, thereby ensuring accurate calibration of the gas water heater fault, avoiding short-term abnormalities of the sectional valve, and preventing the cause of the fault from being found when the gas water heater resumes normal use after reporting a fault.

[0014] Preferably, before step S1, the method further includes the following steps:

[0015] S0. When the sectional valve is in normal use, the real-time status of the sectional valve is detected every 0.5-1.5 ms.

[0016] In the present invention, the above control method is adopted to facilitate the gas water heater to detect the status of the sectional valve in real time, which can not only ensure the normal operation of the gas water heater, but also prepare for timely switching when the sectional valve is abnormal.

[0017] Preferably, the sectional valve includes a first sectional valve and a second sectional valve, and the sections include a first section, a second section and a third section.

[0018] The first stage is a constant fire;

[0019] The second section includes a first section valve;

[0020] The third section includes a first section valve and a second section valve.

[0021] In the present invention, the gas water heater adopts the above-mentioned structural form and control relationship, sets multiple sections, and uses different sectional valves to control each section, so as to facilitate the switching between sectional valves or sections in the gas water heater. This ensures that the gas water heater can operate normally even if the sectional valve is abnormal or the section fails during use, thereby improving user experience and comfort. At the same time, a constant open flame is set at the first section. When an abnormality of the sectional valve is detected, there is a constant open flame and a certain amount of residual gas in the combustion chamber, and the flame will not be immediately extinguished. This ensures that the gas water heater will not stop operating immediately due to encountering an obstacle, thereby improving the user experience.

[0022] Preferably, if the gas water heater is in the second stage for combustion, in step S1, after detecting an abnormality in the first sectional valve; in step S2, the gas water heater opens the second sectional valve to replace the first sectional valve to continue combustion.

[0023] In the present invention, the above-mentioned control method is adopted. Since the second section only includes the first section valve, when the first section valve is abnormal, it is only necessary to switch to the second section valve to replace the abnormal first section valve to continue combustion, ensuring that the gas water heater can operate normally even if the section valve is abnormal during use, thereby improving user experience and comfort.

[0024] Preferably, if the gas water heater is in the second stage for combustion, in step S1, when it is detected that both the first section valve and the second section valve are abnormal, in step S2,

[0025] If the current yield is in the overlapping area of ​​the first stage and the second stage, the gas water heater switches to the first stage to continue combustion instead of the second stage;

[0026] If the current yield is not in the overlapping area between the first section and the second section, combustion is continued according to the maximum yield in the overlapping area.

[0027] In the present invention, the above-mentioned control method is adopted. Since the second section only includes the first section valve, when both the first section valve and the second section valve are abnormal, it is first determined whether the current yield is in the overlapping area of ​​the first section and the second section, and then switched to other sections or burned according to the maximum yield of the overlapping area according to the actual situation, to ensure that the gas water heater can operate normally even if the section valve is abnormal during use, thereby improving user experience and comfort.

[0028] Preferably, if the gas water heater is in the third stage of combustion, in step S1, when an abnormality of the first section valve is detected, in step S2,

[0029] If the current yield is in the overlapping area of ​​the second section and the third section, the gas water heater switches to the second section valve to replace the first section valve to continue combustion;

[0030] If the current yield is not in the overlapping area of ​​the second section and the third section, combustion is continued according to the maximum yield of the overlapping area.

[0031] In the present invention, the above-mentioned control method is adopted. Since the third section includes the first section valve and the second section valve, when an abnormality occurs in the first section valve, it is first determined whether the current yield is in the overlapping area of ​​the second section and the third section, and then switched to other section valves or combustion is performed according to the maximum yield in the overlapping area according to the actual situation, ensuring that the gas water heater can operate normally even if the section valve is abnormal during use, thereby improving user experience and comfort.

[0032] Preferably, if the gas water heater is in the third stage of combustion, in step S1, when an abnormality of the second section valve is detected, in step S2,

[0033] If the current yield is in the overlapping area of ​​the second section and the third section, the gas water heater switches to the first section valve to replace the second section valve to continue combustion;

[0034] If the current yield is not in the overlapping area of ​​the second section and the third section, combustion is continued according to the maximum yield of the overlapping area.

[0035] In the present invention, the above-mentioned control method is adopted. Since the third section includes the first section valve and the second section valve, when an abnormality occurs in the second section valve, it is first determined whether the current yield is in the overlapping area of ​​the second section and the third section, and then switched to other section valves or combustion is performed according to the maximum yield in the overlapping area according to the actual situation, ensuring that the gas water heater can operate normally even if the section valve is abnormal during use, thereby improving user experience and comfort.

[0036] Preferably, if the gas water heater is in the third stage of combustion, in step S1, when it is detected that both the first section valve and the second section valve are abnormal, in step S2, the gas water heater continues to burn according to the maximum yield of the first section.

[0037] In the present invention, the above-mentioned control method is adopted. Since the third section includes the first section valve and the second section valve, when abnormalities occur in both the first section valve and the second section valve, combustion continues directly according to the maximum power of the constant flame section of the first section. Since there is a constant flame and a certain amount of residual gas in the combustion chamber, the flame will not be extinguished immediately. This can ensure that the gas water heater will not stop running immediately due to abnormalities in both section valves when in the third section, thereby improving the user experience.

[0038] Preferably, in step S2, after the user stops using water and reports that the solenoid valve of the gas water heater is faulty, the gas water heater is restarted.

[0039] If the gas water heater reports the same fault, it is the sectional valve that is directly abnormal;

[0040] If the gas water heater reports different faults, the sectional valve needs to be checked;

[0041] If no fault is reported after restart, it is a temporary abnormality.

[0042] In the present invention, the above-mentioned control method is adopted to repair the faults of the sectional valve and the like through various situations and error messages encountered by the user after stopping use without affecting the normal use of the gas water heater, thereby ensuring accurate correction of the gas water heater fault, avoiding temporary abnormalities of the sectional valve, and preventing the cause of the fault from being found when the gas water heater resumes normal use after reporting a fault.

[0043] Preferably, in step S2, when the other sectional valves are opened to replace the abnormal sectional valve for combustion, if the switching of the other sectional valves fails, the flameout will occur and the gas water heater will report a flameout fault.

[0044] In the present invention, the above-mentioned control method is adopted. Although the gas water heater goes out due to switching failure when switching to other sectional valves due to an abnormality of the sectional valve, the gas water heater will report information based on the real reason for the failure to operate normally. The technicians can perform targeted maintenance on the gas water heater based on the specific information displayed by the gas water heater to ensure that the gas water heater can be effectively handled.

[0045] Preferably, in step S2, when the other sectional valves are opened to replace the abnormal sectional valve for combustion, combustion is performed according to the current target yield after the other sectional valves are successfully switched.

[0046] In the present invention, the above-mentioned control method is adopted. When the sectional valve in the gas water heater is abnormal, it is necessary to switch to other sectional valves. In order to ensure the normal operation of the gas water heater and the user experience, after successfully switching to other sectional valves, combustion continues according to the current target yield.

[0047] Preferably, in step S2, when opening the other sectional valves to replace the abnormal single sectional valve for combustion, after successfully switching the other sectional valves, if the current target yield cannot be reached, combustion is performed at the current maximum yield.

[0048] In the present invention, the above-mentioned control method is adopted. When the sectional valve in the gas water heater is abnormal, it is necessary to switch to other sectional valves. In order to ensure the normal operation of the gas water heater and to meet the user's current usage experience as much as possible, after successfully switching to other sectional valves, combustion continues at the current maximum yield.

[0049] The positive progress of the present invention is that the control method of the gas water heater adopts the above-mentioned control method to avoid a direct fault error and cessation of use when a sectional valve in the gas water heater is abnormal, which affects the user experience. The present invention can switch based on the yield range, and continue to burn by switching to another normal sectional valve to replace the abnormal sectional valve, ensuring that the gas water heater can operate normally even if the sectional valve is abnormal during use, thereby improving the user experience and comfort. At the same time, in response to the problem of low fault tolerance of sectional valves in the prior art, the present invention can use the error information of the user after stopping use to repair the sectional valve and the like without affecting the normal use of the gas water heater, thereby ensuring accurate calibration of the gas water heater fault, avoiding short-term abnormalities of the sectional valve, and preventing the cause of the fault from being found when the gas water heater resumes normal use after reporting a fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural diagram of a gas water heater according to a first embodiment of the present invention.

[0051] Figure 2 This is a flowchart of a control method for a gas water heater according to a first embodiment of the present invention.

[0052] Figure 3 This is a flowchart of the use of the gas water heater according to the first embodiment of the present invention.

[0053] Figure 4 This is a structural diagram of a gas water heater according to a second embodiment of the present invention.

[0054] Figure 5 This is a flowchart of the use of the gas water heater according to the second embodiment of the present invention.

[0055] Description of reference numerals:

[0056] Gas water heater 100

[0057] Sectional valve 11

[0058] First section valve 111

[0059] Second section valve 112

[0060] Proportional valve 12

[0061] Main valve 13

[0062] Fire row 14

[0063] Sensor pin 15

[0064] Heat exchanger 16

[0065] Igniter 17

[0066] Fan 18

[0067] Rank 200

[0068] First Dan 21

[0069] Second tier 22

[0070] Third tier 23 DETAILED DESCRIPTION

[0071] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0072] [Example 1]

[0073] like Figure 1 As shown, embodiment 1 discloses a schematic structural diagram of each module of the gas water heater 100 of the present invention.

[0074] The gas water heater 100 includes a fire bar 14, a spark sensor, and an igniter 17. The air inlet of the fire bar 14 is connected to an external gas pipeline. The spark sensor is located at the air outlet of the fire bar 14, which includes several spaced-apart air outlets. The spark sensor is used to generate sparks when the igniter 17 is turned on. The spark sensor and igniter 17 are electrically connected, and the igniter 17 is electrically connected to the control module of the gas water heater 100.

[0075] In this embodiment, the control module can control the igniter 17 to turn on or off, thereby controlling the spark sensor to generate a spark to ignite the gas output by the fire bar 14. The output gas is divided into several portions through the multiple gas outlets of the fire bar 14, so that the gas is evenly distributed, the gas burns evenly and fully, and the heat exchanger 16 is heated more evenly.

[0076] The solenoid valve of the gas water heater 100 includes a main valve 13, a proportional valve 12, and a sectional valve 11. The air inlet of the main valve 13 is connected to the external gas pipe, and the air outlet of the main valve 13 is connected to the air inlet of the fire grate 14. The main valve 13 is used to open or close the gas supply system inside the gas water heater 100 and can be used as the main gas switch of the water supply system.

[0077] The air outlet of the main valve 13 is connected to the air inlet of the proportional valve 12, and the air outlet of the proportional valve 12 is connected to the air inlet of the fire strip 14. The proportional valve 12 is connected to the control module via an electrical signal to adjust the amount of gas entering the water supply system.

[0078] In this embodiment, the control module controls the proportional valve 12 to adjust the gas volume of the water supply system, thereby controlling the heating state of the heat exchanger 16 caused by the gas combustion. The control module is also electrically connected to the sectional valve 11. Through the sectional valve 11, the control module can control the segmented gas supply state of the fire grate 14, thereby controlling the heating state of the heat exchanger 16 caused by the gas combustion. The opening and closing degree of the proportional valve 12 controls the output of the gas water heater 100. Furthermore, the gas water heater 100 includes multiple sections 200 during use. Each section 200 opens and closes a different sectional valve 11, resulting in a different output range for each section 200.

[0079] Furthermore, the gas water heater 100 further includes a fan 18 , which is disposed below the fire grate 14 , with the air outlet of the fan 18 facing upward, and the fan 18 is also electrically connected to the control module.

[0080] In this embodiment, the blowing of the fan 18 can cause the gas to move upward, ensuring that the gas is in a safe combustion area or discharged into the water supply system, thereby improving safety.

[0081] like Figure 2 and Figure 3 As shown, a control method and a flow chart of the use of a gas water heater 100 are disclosed. The control method is used for emergency protection after the sectional valve 11 is abnormal in the combustion state. The control method of the gas water heater 100 includes the following steps:

[0082] S1. After detecting that the sectional valve 11 is abnormal, obtaining the current productivity of the gas water heater 100;

[0083] S2. Determine whether the yield is in the yield overlap area between the current failure segment 200 and the segment 200 with a yield lower than the current failure segment 200; if the current yield is in the overlap area, the gas water heater 100 opens the sectional valve 11 corresponding to the segment 200 with a yield lower than the current segment 200, and takes over the abnormal sectional valve 11 for combustion, and the gas water heater 100 does not report a fault state; if the current yield is not in the overlap area, the gas water heater 100 burns at the maximum yield in the overlap area, the gas water heater 100 reports a fault state, and reports a solenoid valve fault of the gas water heater 100 after the user stops using water.

[0084] In this embodiment, the above-mentioned control method is adopted to avoid a direct fault error and cessation of use when a sectional valve 11 in the gas water heater 100 is abnormal, which affects the user experience. The present invention can switch based on the yield range, and switch to another normal sectional valve 11 to replace the abnormal sectional valve 11 to continue combustion, thereby ensuring that the gas water heater 100 can operate normally even if the sectional valve 11 is abnormal during use, thereby improving the user experience and comfort. At the same time, in response to the problem of low fault tolerance of the sectional valve 11 in the prior art, the present invention can use the error message after the user stops using it to repair the sectional valve 11 and other faults without affecting the normal use of the gas water heater 100, thereby ensuring accurate correction of the gas water heater 100 fault, avoiding temporary abnormalities of the sectional valve 11, and preventing the gas water heater 100 from finding the cause of the fault when it resumes normal use after reporting a fault.

[0085] Before the above-mentioned step S1, the following steps are also included: S0. When the sectional valve 11 is in normal use, the status of the sectional valve 11 is monitored and detected every 0.5-1.5ms. The use of this control method facilitates the gas water heater 100 to detect the status of the sectional valve 11 in real time, which not only ensures the normal operation of the gas water heater 100, but also prepares for timely switching when the sectional valve 11 is abnormal.

[0086] Therefore, in this embodiment, it is preferred to check the status of the sectional valve 11 every 1 ms to ensure the normal operation of the sectional valve 11. When an abnormality is detected in the sectional valve 11, there is still a constant flame and a certain amount of residual gas in the combustion chamber, and the flame will not be extinguished immediately. At this time, step S2 is required to obtain and check whether the current yield is within the overlap zone of the sectional valve 11.

[0087] In this embodiment, the sectional valve 11 of the gas water heater 100 includes a first sectional valve 111 and a second sectional valve 112 , and the sections 200 include a first section 21 , a second section 22 and a third section 23 .

[0088] The first section 21 is a constantly open fire, without the section valve 11 connected, and the yield range of the first section 21 is 500-1200; the second section 22 is based on the constantly open fire fire bar 14 and also includes the first section valve 111, and the yield range of the second section 22 is 800-2000; the third section 23 is based on the constantly open fire fire bar 14 and also includes the first section valve 111 and the second section valve 112, and the yield range of the third section 23 is 1300-3000.

[0089] Thus, it can be seen that there is an overlap between the various sections 200 including the first section 21, the second section 22, and the third section 23, i.e., the overlap between the first section 21 and the second section 22 is 800-1200, and the overlap between the second section 22 and the third section 23 is 1300-2000. Therefore, in this embodiment, the gas water heater 100 adopts the above-mentioned structure and control relationship, sets multiple sections 200, and uses different section valves 11 to control each section, so as to facilitate switching between the section valves 11 or sections 200 in the gas water heater 100. This ensures that even if one of the section valves 11 is abnormal during use, or the current section 200 fails, the gas water heater 100 can still operate normally and provide hot water, avoiding shutdown and interruption of hot water supply, thereby improving user experience and comfort. At the same time, a constantly burning flame is set on the first section 21. When an abnormality is detected in the sectional valve 11, there is a constantly burning flame and a certain amount of residual gas in the combustion chamber, and the flame will not be extinguished immediately, ensuring that the gas water heater 100 will not stop running immediately due to encountering obstacles, thereby improving the user experience.

[0090] As a preferred embodiment of the present invention, if the gas water heater 100 is in the first section 21 of combustion, in step S1, when an abnormality is detected in the first section valve 111 and / or the second section valve 112, the gas water heater 100 operates normally, that is:

[0091] When the first section 21 is burning, the first section valve 111 is abnormal, and the gas water heater 100 works normally. After the user stops using water, the electromagnetic valve of the gas water heater 100 is reported to be faulty;

[0092] When the first section 21 is burning, the second section valve 112 is abnormal, and the gas water heater 100 works normally. After the user stops using water, the solenoid valve of the gas water heater 100 is reported to be faulty;

[0093] When the first section 21 is burning, the first section valve 111 and the second section valve 112 are both abnormal, and the gas water heater 100 works normally. After the user stops using water, the electromagnetic valve of the gas water heater 100 is reported to be faulty.

[0094] As a preferred embodiment of the present invention, if the gas water heater 100 is in the second stage 22 of combustion, the following processing is performed in step S1:

[0095] If the first sectional valve 111 is detected to be abnormal, the gas water heater opens the second sectional valve 112 to replace the first sectional valve 111 and continue combustion;

[0096] If the second segment valve 112 is detected to be abnormal, the gas water heater 100 operates normally, and the electromagnetic valve failure of the gas water heater 100 is reported after the user stops using water;

[0097] If both the first section valve 111 and the second section valve 112 are detected to be abnormal, in step S2, when the yield is between the overlapping area of ​​the first section 21 and the second section 22, that is, the yield is within the yield range of 800-1200, the gas water heater switches to the first section 21 to replace the second section 22 to continue combustion;

[0098] When both the first section valve 111 and the second section valve 112 are abnormal, in step S2, when the yield is not between the overlapping area of ​​the first section 21 and the second section 22, that is, the yield is within the yield range of 1200-2000, combustion continues according to the maximum yield of the overlapping area, that is, combustion continues directly at 1200, and after the user stops using water, the solenoid valve failure of the gas water heater 100 is reported.

[0099] In this embodiment, because the second section 22 only includes the first segmented valve 111, when the first segmented valve 111 is abnormal, it is only necessary to switch to the second segmented valve 112 to replace the abnormal first segmented valve 111 to continue combustion; when the first segmented valve 111 is abnormal, the gas water heater 100 can be used normally; when both the first segmented valve 111 and the second segmented valve 112 are abnormal, it is first determined whether the current yield is within the overlapping area of ​​the first segment 21 and the second segment 22, and then, based on the actual situation, it is switched to another segment 200 or combustion is performed according to the maximum yield in the overlapping area. Therefore, the above control method ensures that the gas water heater 100 can operate normally even if the segmented valve 11 is abnormal during use, thereby improving user experience and comfort.

[0100] As a preferred embodiment of the present invention, if the gas water heater 100 is in the third stage 23 of combustion, the following processing is performed in step S1:

[0101] If an abnormality is detected in the first section valve 111, in step S2, when the yield is between the overlapped area of ​​the second section 22 and the third section 23, that is, the yield is within the yield range of 1300-2000, the gas water heater opens the second section valve 112 to take over the first section valve 111 to continue combustion;

[0102] If an abnormality is detected in the first section valve 111, in step S2, if the yield is not between the overlapped area of ​​the second section 22 and the third section 23, that is, the yield is within the yield range of 2000-3000, combustion is continued at the maximum yield of the overlapped area, that is, combustion is continued directly at 2000, and a solenoid valve fault of the gas water heater 100 is reported after the user stops using water;

[0103] If an abnormality is detected in the second section valve 112, in step S2, when the yield is between the overlapped area of ​​the second section 22 and the third section 23, that is, the yield is within the yield range of 1300-2000, the gas water heater opens the first section valve 111 to replace the second section valve 112 to continue combustion;

[0104] If an abnormality is detected in the second section valve 112, in step S2, if the yield is not between the overlapped area of ​​the second section 22 and the third section 23, that is, the yield is within the yield range of 2000-3000, combustion is continued at the maximum yield of the overlapped area, that is, combustion is continued directly at 2000, and a solenoid valve fault of the gas water heater 100 is reported after the user stops using water;

[0105] If it is detected that both the first section valve 111 and the second section valve 112 are abnormal, combustion will continue according to the maximum yield of the first section 21, that is, combustion will continue directly according to the maximum yield 1200 of the first section 21 constant flame, and the solenoid valve failure of the gas water heater 100 will be reported after the user stops using water.

[0106] In this embodiment, because the third section 23 includes the first section valve 111 and the second section valve 112, when an abnormality occurs in the first section valve 111 or the second section valve 112, it is first determined whether the current yield is in the overlapping area of ​​the second section 22 and the third section 23, and then switched to other section valves 11 according to the actual situation or combustion is performed according to the maximum yield of the overlapping area, ensuring that the gas water heater 100 can operate normally even if the section valve 11 is abnormal during use, thereby improving user experience and comfort. When both the first section valve 111 and the second section valve 112 are abnormal, combustion continues directly at the maximum power of the constant flame section of the first section 21. Because there is a constant flame and a certain amount of residual gas in the combustion chamber, the flame will not be extinguished immediately. This ensures that the gas water heater 100 will not stop operating immediately due to both section valves 11 encountering abnormalities when in the third section 23, thereby improving the user experience.

[0107] As a preferred embodiment of the present invention, after the user stops using water and the solenoid valve of the gas water heater 100 is reported to be faulty, restarting the gas water heater 100 may result in the following three situations:

[0108] If the gas water heater 100 reports the same fault, then the sectional valve 11 is directly abnormal;

[0109] If the gas water heater 100 reports a different fault, the section valve 11 needs to be checked;

[0110] If no fault is reported after restart, it is a temporary abnormality.

[0111] That is, when any section of the fire is burning, it is determined whether the first or second section valve 111, 112 is temporarily abnormal or directly abnormal. According to the above-mentioned judgment mechanism, as long as the section valve 11 is abnormal, a parameter a is saved (a = 0 indicates no section valve 11 abnormality, a = 1 indicates section valve 11 abnormality, a = 2 indicates section valve 112 abnormality, and a = 3 indicates both section valves 111 and 2 abnormalities). After restarting the gas water heater 100, if the same fault is still reported, a parameter b is saved. If a = b and a is not equal to 0, it is a direct abnormality of section valve 11, please check section valve 11; if no fault is reported after restarting, a! = b, it is a temporary abnormality; if a different fault is reported after restarting, please check section valve 11. Whether it is a temporary abnormality or a direct abnormality can be displayed using a combination key, so that after-sales service technicians can quickly find the source of the fault. This method can effectively improve the fault tolerance rate of section valve 11 abnormality without emergency use. In this embodiment, the above-mentioned control method is adopted to repair the faults of the sectional valve 11 and the like without affecting the normal use of the gas water heater 100 through various situations and error messages encountered by the user after stopping use, thereby ensuring accurate correction of the fault of the gas water heater 100 and avoiding temporary abnormalities of the sectional valve 11, so that the cause of the fault cannot be found when the gas water heater 100 resumes normal use after reporting a fault.

[0112] [Example 2]

[0113] like Figure 4-Figure 5 As shown, Example 2 also provides a schematic structural diagram of the various modules of the gas water heater 100 and a flowchart for its use. The structure and control principle of the gas water heater 100 provided in Example 2 differ primarily from those in Example 1 in that the gas water heater 100 in this embodiment lacks a constantly open flame and cannot be shut off, i.e., there is no first section 21 that can be opened or closed. Therefore, when the sectional valve 11 malfunctions, attempting to switch the valve may result in several issues.

[0114] Scenario 1: When another sectional valve 11 is opened to replace the abnormal sectional valve 11 for combustion, a failure to switch to the other sectional valve 11 will cause the flame to extinguish, and the gas water heater 100 will report a flameout fault. Although the gas water heater 100 extinguishes due to a failure to switch to the other sectional valve 11 due to the abnormal sectional valve 11, the gas water heater 100 will report the actual reason for the malfunction. Technicians can perform targeted maintenance on the gas water heater 100 based on the specific information displayed by the gas water heater 100, ensuring that the gas water heater 100 can be effectively repaired.

[0115] Scenario 2: When another sectional valve 11 is opened to replace the abnormal sectional valve 11 for combustion, after the other sectional valve 11 is successfully switched, combustion is performed at the current target yield, which ensures the normal operation of the gas water heater 100 and the user's experience. If the current target yield cannot be achieved, combustion is performed at the current maximum yield, which ensures the normal operation of the gas water heater 100 and the user's current experience as much as possible.

[0116] The present invention is mainly described with a household instantaneous gas water heater 100 as an example, and the control method provided is also applicable to commercial gas water heaters 100. It also includes liquefied gas type household and commercial gas water heaters 100. At the same time, in other embodiments, the number of segment valves 11 and the location and form of each segment valve 11 can be the same as Figure 1 Different, also belong to the protection scope of the present invention.

[0117] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A method for controlling a gas water heater, characterized in that: The control method of the gas water heater comprises the following steps: S1. After detecting an abnormality in the sectional valve, obtaining the current output rate of the gas water heater; S2. Determine whether the yield is in a region where the current failure segment overlaps with a yield lower than the current failure segment; If the current yield is in the overlapping area, the gas water heater opens the sectional valve corresponding to the segment with a yield lower than the current segment, and takes over the abnormal sectional valve for combustion, and the gas water heater does not report a fault state; If the current yield is not in the overlap area, the gas water heater burns at the maximum yield in the overlap area, and the gas water heater reports a fault state. After the user stops using water, the solenoid valve of the gas water heater is reported to be faulty.

2. The control method of the gas water heater according to claim 1, characterized in that: Before step S1, the method further includes the following steps: S0. When the sectional valve is in normal use, the real-time status of the sectional valve is detected every 0.5-1.5 ms.

3. The control method of the gas water heater according to claim 1, characterized in that: The sectional valve includes a first sectional valve and a second sectional valve, and the sections include a first section, a second section and a third section. The first stage is a constant fire; The second section includes a first section valve; The third section includes a first section valve and a second section valve.

4. The control method of the gas water heater according to claim 3, characterized in that: If the gas water heater is in the second section for combustion, in step S1, after detecting an abnormality in the first section valve; in step S2, the gas water heater opens the second section valve to replace the first section valve to continue combustion.

5. The control method of the gas water heater according to claim 3, characterized in that: If the gas water heater is in the second stage of combustion, in step S1, when it is detected that both the first section valve and the second section valve are abnormal, in step S2, If the current yield is in the overlapping area of ​​the first stage and the second stage, the gas water heater switches to the first stage to continue combustion instead of the second stage; If the current yield is not in the overlapping area between the first section and the second section, combustion is continued according to the maximum yield in the overlapping area.

6. The control method of the gas water heater according to claim 3, characterized in that: If the gas water heater is in the third stage of combustion, in step S1, when an abnormality is detected in the first section valve, in step S2, If the current yield is in the overlapping area of ​​the second section and the third section, the gas water heater switches to the second section valve to replace the first section valve to continue combustion; If the current yield is not in the overlapping area of ​​the second section and the third section, combustion is continued according to the maximum yield of the overlapping area.

7. The control method of the gas water heater according to claim 3, characterized in that: If the gas water heater is in the third stage of combustion, in step S1, when an abnormality of the second section valve is detected, in step S2, If the current yield is in the overlapping area of ​​the second section and the third section, the gas water heater switches to the first section valve to replace the second section valve to continue combustion; If the current yield is not in the overlapping area of ​​the second section and the third section, combustion is continued according to the maximum yield of the overlapping area.

8. The control method of the gas water heater according to claim 3, characterized in that: If the gas water heater is in the third stage of combustion, in step S1, when it is detected that both the first section valve and the second section valve are abnormal, in step S2, the gas water heater continues to burn according to the maximum yield of the first section.

9. The control method of a gas water heater according to claim 1, characterized in that: In step S2, after the user stops using water, the solenoid valve of the gas water heater is reported to be faulty, and the gas water heater is restarted. If the gas water heater reports the same fault, it is the sectional valve that is directly abnormal; If the gas water heater reports different faults, the sectional valve needs to be checked; If no fault is reported after restart, it is a temporary abnormality.

10. The control method of the gas water heater according to claim 1, characterized in that: In step S2, when the other sectional valves are opened to replace the abnormal sectional valve for combustion, if the switching of the other sectional valves fails, the flameout will occur and the gas water heater will report a flameout fault.

11. The control method of a gas water heater according to claim 1, wherein: In step S2, when the other sectional valves are opened to replace the abnormal sectional valve for combustion, after the other sectional valves are switched successfully, combustion is performed according to the current target yield.

12. The control method of the gas water heater according to claim 11, characterized in that: In step S2, when the other sectional valves are opened to replace the abnormal sectional valve for combustion, after the other sectional valves are switched successfully, if the current target yield cannot be reached, combustion is performed at the current maximum yield.

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