Constant-temperature type gas water heater and control method
A technology of a gas water heater and a control method, which is applied to fluid heaters, lighting and heating equipment, etc., which can solve problems such as large fluctuations in outlet water temperature, failure to achieve constant temperature, and influence on outlet water temperature, and achieve simple water channels, solve bathing pain points, and install achieve convenient effects
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Embodiment 1
[0029] Such as figure 1 As shown, a constant temperature gas water heater includes: a heat exchanger 1, a water inlet pipe 2 connected to the heat exchanger 1, a water outlet pipe 3, and a bypass pipe 4 connected between the water inlet pipe 2 and the water outlet pipe 3 , which is characterized in that a circulation pump 5 and a one-way valve 6 are provided on the bypass pipe 4, and the conduction direction of the one-way valve 6 is to make the water flow from the outlet pipe 3 to the water inlet pipe 2. A water storage tank 7 is provided on the water inlet pipe 2 for buffering the amount of cold water flowing in during the start-up process.
[0030] For the convenience of controlling the starting timing of the circulation pump 5, a first temperature sensor 8 and a first water flow sensor 9 are also provided on the water inlet pipe 2, and the first temperature sensor 8 and the first water flow sensor 9 are interposed between the bypass pipe. Between the connection end and th...
Embodiment 2
[0036] Such as Figure 4 As shown, the structure of the constant temperature gas water heater provided in this embodiment is basically the same as that of Embodiment 1, the difference is that a second water flow sensor 12 for monitoring the circulation flow is provided on the bypass pipe 4, and the first The water flow sensor 9 is arranged at the water inlet end of the water inlet pipe 2 . When the first water flow sensor detects the water flow signal, the circulation pump stops immediately and the gas water heater is ignited. When the water flow detected by the second water flow sensor 12 is lower than the set threshold, a signal is sent to the main controller of the gas water heater, and the main controller of the gas water heater sends a blockage alarm according to the signal.
Embodiment 3
[0038] Such as Figure 5 As shown, the structure of the constant temperature gas water heater provided by this embodiment is basically the same as that of the first embodiment, except that the coil 11 is connected to the heat coil between the heat exchanger 1 and the water outlet pipe 3 .
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