Gas water heater, control method thereof and waterway pipe network

Abstract

A gas water heater comprises a heat exchanger, a water tank, a water inlet pipe and a water outlet pipe, wherein the water tank is mounted on the water outlet pipe in series, the water inlet pipe and the water outlet pipe are connected to two ends of the heat exchanger respectively, the gas water heater is mainly technically characterized by further comprising a circulating water pump, a water inlet check valve and a water return inlet pipe, the circulating water pump is mounted on the water inlet pipe, and a water pump check valve is mounted at an upstream end or a downstream end of the circulating water pump; a connection pipe is connected to the water inlet pipe, the connection pipe, the circulating water pump and the water pump check valve are arranged in parallel, and the water inlet check valve is mounted on the connection pipe; one end of the water return inlet pipe is a reserved opening, and the other end of the water return inlet pipe is connected with the connection pipe and connected to the downstream end of the water inlet check valve. The gas water heater is matched with other control methods and an external waterway, when the circulating water pump works, water in the water outlet pipe and the water tank can reflow to the heat exchanger and be stored in the water tank, so that cold water in the water pipe is effectively reduced, and a user can be ensured to use hot water with appropriate temperature after starting a machine.

Description

technical field [0001] The invention relates to the field of gas appliances, in particular to a gas water heater, a control method thereof, and a water pipe network. Background technique [0002] At present, in most families, there are multiple water points in the house, and the pipes in the house are long and complicated. Before using the gas water heater, the pipes are full of cold tap water. In the process of using a gas water heater, the cold water in the pipe must first be drained before the hot water comes out. The process of draining the cold water may take 15-30 seconds at least, and it may take 5-6 minutes at the longest, depending on the The length and complexity of the pipeline. Furthermore, due to the influence of water pressure fluctuations in the bathing process, the fluctuation of the outlet water temperature will inevitably be caused and the phenomenon that the water temperature will rise after the water heater is turned off for a short time will occur in th...

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Problems solved by technology

Furthermore, due to the influence of water pressure fluctuations during the bathing process, it is inevitable to cause fluctuations in the temperature of the outlet water, and during the bathing process, the water temperature will rise after the water heater is turned off for a short time.

The above series of problems seriously affect the user's bathing comfort

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