Constant temperature gas water heater and control method thereof

Abstract

The invention discloses a constant temperature gas water heater and a control method thereof, wherein the constant temperature gas water heater comprises a burner, a heat exchanger, a water inlet pipe, a water outlet pipe, a temperature detection device, a water flow detection device, a gas control valve and a controller, the gas water heater further comprises a current stabilizer and a water flowcontrol valve, the current stabilizer is arranged on the water inlet pipe, a water inlet and a first water outlet are formed in the water flow control valve, the water inlet communicates with the water inlet end of the current stabilizer, the first water outlet communicates with the water outlet end of the current stabilizer, and the controller is electrically connected with the water flow control valve so as to control the opening and closing between the first water outlet and the water inlet. The water heater provided by the invention can form multi-channel water flow to realize the switching of large and small water gears; in addition, because the water heater is in a small water flow position in a heating stage, the problems of long waiting time for hot water and much waste of cold water in the existing constant temperature gas water heater are solved, meanwhile, the influence of water supply pressure in the heating stage can be reduced, and the rapid heating effect can be improved.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to a temperature control technology of a constant temperature gas water heater. Background technique [0002] At present, for ordinary constant temperature gas water heaters, when the user turns on the hot water tap for the first time, the interval from the water flow signal monitored by the water flow sensor to the ignition of the water heater is more than 2 seconds. It also takes a certain amount of time for the hot water pipe to flow to the hot water tap. Therefore, after the ordinary constant temperature gas water heater turns on the hot water tap, it usually takes more than 30 seconds from turning on the hot water tap until the comfortable hot water flows out, and the user needs to wait for the cold water to be drained before using the hot water, resulting in a waste of tap water. [0003] In addition, for ordinary gas water heaters, the user turns off the water in the m...

AI Technical Summary

Problems solved by technology

Some gas water heaters on the market have a water mixing pipe between the water inlet pipe and the water outlet pipe. After the water is turned off and restarted midway, the tap water will flow through the internal main water circuit heat exchanger and the water mixing pipe. outflow, which can effectively reduce the temperature rise when the water is stopped, but it cannot solve the problem of cold water in the rear stage

When the water supply pressure is low, affected by the diversion of the mixing pipe, the tap water flowing through the internal main waterway heat exchanger becomes smaller. If the temperature of the water stored in the heat exchanger is too high, it is easy to boil and vaporize, resulting in abnormal noise and affecting the product life.

[0004] It can be seen that ordinary gas water heaters have the following defects: the hot water is slow to come out at the first start, and too much cold water needs to be drained; the water is turned off and restarted halfway, the temperature rises too high when the water is stopped, and the water temperature suddenly rises and falls, which affects the safety of bathing and wastes water resources; setting The water mixing pipe cannot solve the cold water in the rear section, and it is easy to generate noise, which affects the life of the product

Images