Heat switching control device of water heater, water heater, and heat switching control method of water heater
A control device and water heater technology, which is applied to fluid heaters, lighting and heating equipment, etc., can solve problems such as endangering user safety, corroding heat exchangers, and affecting the service life of heat exchangers and water heaters.
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specific Embodiment 1
[0078] Such as image 3 As shown, in this embodiment, set the small heat as Q 小 , the middle heat is Q 中 , the maximum heat is Q 大 , Q 小 , Q 中 , Q 大 The value of Q is set to a fixed value, Q 小 中 大 .
[0079] The heat generated by the controller chip when the water heater is working is Q, and the hysteresis error value is ΔQ, and ΔQ can be set as a fixed value.
[0080] And Q=(T-Tin)·W;
[0081] Among them, T is the temperature of the water heater when it is working, and the temperature range of T is calculated by the controller through the actual working state as 25°C to 100°C.
[0082] Tin is the water inlet temperature measured by the water temperature sensor; W is the water inlet water volume measured by the water volume sensor.
[0083] A heat switching control method for a water heater includes the following steps:
[0084] 1) Set the working state of the water heater to the low heat state;
[0085] 2) The MCU reads the data of the water volume sensor 5, and ju...
specific Embodiment 2
[0105] When the initial working state of the water heater is a medium heat state, such as Figure 4 As shown, a water heater heat switching control method includes the following steps:
[0106] 1) Set the working state of the water heater to the medium heat state;
[0107] 2) The MCU reads the data of the water volume sensor 5, and judges whether the water volume is above the specified lower limit water volume, if not, execute step 3), if so, execute step 4);
[0108] 3) Heat exchanger 1 combustion stops, execute step 15);
[0109] 4) Judge Q 小 ≥ Whether Q is established, if yes, go to step 3), if not, go to step 5);
[0110] 5) Judging whether the heat exchanger 1 has stopped burning, if so, then perform step 6), if not, then perform step 8);
[0111] 6) Judge Q 小 Whether ≤Q-ΔQ holds true, if yes, execute step 7), if not, execute step 3);
[0112] 7) The heat exchanger 1 operates in a low heat state, and executes step 15);
[0113] 8) Determine whether the heat exchang...
specific Embodiment 3
[0127] When the initial working state of the water heater is a high heat state, such as Figure 5 As shown, a water heater heat switching control method includes the following steps:
[0128] 1) Set the heating state of the water heater to the high heat state;
[0129] 2) The control chip reads the data of the water volume sensor 5, and judges whether the water volume is above the specified lower limit water volume, if not, execute step 3), if so, execute step 4);
[0130] 3) The combustion of the heat exchanger 1 is stopped, and step 15 is executed);
[0131] 4) Judge Q 小 ≥ Whether Q is established, if yes, go to step 3), if not, go to step 5);
[0132] 5) Judging whether the heat exchanger 1 has stopped burning, if so, then perform step 6), if not, then perform step 8);
[0133] 6) Judge Q 小 Whether ≤Q-ΔQ holds true, if yes, execute step 7), if not, execute step 3);
[0134] 7) The heat exchanger 1 is operated in a low heat state, and step 15 is performed);
[0135] 8...
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