Intelligent preheating circulation gas water heater, preheating circulation system and control method

Abstract

The invention belongs to the field of water heaters, and discloses an intelligent preheating circulation gas water heater, a preheating circulation system and a control method. A water storage tank and a water pump are arranged on a water inlet pipeline; a three-way valve is arranged on a water outlet pipeline; a heat exchanger is arranged between the water inlet pipeline and the water outlet pipeline; the three-way valve communicates with the water storage tank through a bypass line; when a preheating circulation function is started, the conducting of the three-way valve and the bypass line is controlled; an inner circulation pipeline system is formed among the water inlet pipeline, the water pump, the heat exchanger, the water outlet pipeline, the three-way valve, the bypass line and thewater storage tank; and when the water outlet temperature T2 of the water storage tank is smaller than the preset circulation temperature Tx, the water pump circulates water in the inner circulationpipeline system, and water is heated to the temperature which is not less than the circulation temperature Tx. When a user uses hot water, water in the water storage tank is heated to the temperaturewhich is not less than the circulation temperature Tx and firstly flows out; and after hot water in the water storage tank flows out, entered cold water can be stably heated through the gas water heater so as to reach to the preset temperature required by the user.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to an intelligent preheating cycle gas water heater, a preheating cycle system and a control method. Background technique [0002] Now domestic gas water heaters are becoming the first choice for future water heaters because of their characteristics of instant hot water and unlimited water consumption. However, the gas water heater has the following problems when it is used: when the gas water heater is turned on, it is necessary to discharge the cold water retained in the hot water outlet pipeline before the hot water can be released, causing the user to wait and the released cold water is wasted; when the gas water heater is turned on again When the water outlet valve is turned off, there will be hot and cold water, which will affect the comfort of the user. [0003] In order to solve the above problems, a water heater with a preheating cycle function is currently designed,...

AI Technical Summary

Problems solved by technology

However, the gas water heater has the following problems when it is used: when the gas water heater is turned on, it is necessary to discharge the cold water retained in the hot water outlet pipeline before the hot water can be released, causing the user to wait and the released cold water is wasted; when the gas water heater is turned on again When the water outlet valve, there will be hot and cold water phenomenon, affecting the user's comfort

When the water outlet valve is opened, the cold tap water will immediately enter the water heater. During the above-mentioned 15-second heating process, the heating of the water heater is unstable, and the cold water always flows out, and then the hot water flows out.

In this way, when using hot water, there will be a period of alternating hot and cold water flowing out of the boiling water. When bathing, this part of alternating hot and cold water cannot be used and can only be wasted.

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