Anti-clamping stagnation control method for zero-cold-water gas hot water built-in water pump

Abstract

The invention belongs to the technical field of zero-cold-water gas water heaters, and discloses an anti-clamping stagnation control method for a zero-cold-water gas water heater built-in water pump.The method comprises the following steps that the accumulated stop running time t of a built-in water pump is collected; whether the t meets the condition of anti-clamping stagnation operation or not;if yes, the accumulated operation stopping time t is reset, the built-in water pump is started at a first power threshold value P0, and whether the instantaneous rotating speed V0 of the built-in water pump after the built-in water pump operates at the first time threshold value meets the condition that V0 is larger than a first rotating speed threshold value V0' or not is detected; if not, the built-in water pump operates at a second power threshold P1, and whether the instantaneous rotating speed V1 of the built-in water pump after operating at a third time threshold meets the condition that V1 is larger than a second rotating speed threshold V1' or not is detected; and if not, after the built-in water pump operates at the rated power P for a fifth time threshold value, the zero-cold-water gas water heater exits from the anti-clamping stagnation state. According to the method, the built-in water pump can be started at low power, the problem of clamping stagnation can be solved, andnoise is lowered.

Description

technical field [0001] The invention belongs to the technical field of zero-cold water gas water heaters, and in particular relates to a control method for preventing a stuck water pump built into a zero-cold water gas water heater. Background technique [0002] Such as figure 1 As shown, after the zero-cold water gas water heater starts the zero-cold water function, the built-in water pump of the water heater will start. After starting, the water in the hot water pipeline will flow, flow out through the outlet pipe of the water heater, and the outflowing water will flow back to the water heater through the return pipe. A circulation pipeline is formed. After the water heater detects a water flow signal, it starts the burner. Usually, after 3-5 minutes of water circulation, all the water in the circulation pipeline can be heated to the temperature set by the user. Hot water, no cold water coming out first, ie "zero" cold water. [0003] That is to say, the built-in water p...

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Problems solved by technology

[0004] In view of this, in order to solve the problem that the built-in water pump of the existing zero-cold water gas water heater is stuck due to long-term stagnation, the present invention provides a control method for preventing the built-in water pump of the zero-cold water gas water heater from being stuck

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