Instantly-heating circulatory system suitable for water heater and control method thereof

Abstract

The invention relates to an instantly-heating circulatory system suitable for a water heater and a control method thereof. The system and method solve the problems that in the prior art, a water heater in a heat circulatory system is frequently started, and hot water is prone to flowing into a cold water pipe. According to the technical scheme, a circulation device and a one-way valve assembly areincluded, the circulation device is mounted on a cold water pipe or a hot water pipe connected to the water heater, the one-way valve assembly is arranged at the tail end of the hot water pipe of thewater heater, a control module, a heating module in signal connection with the control module and a variable frequency water pump are arranged in the circulation device, the one-way valve assembly isprovided with a first temperature sensor, and the first temperature sensor is in signal connection with the control module. The instantly-heating circulatory system has the beneficial effect that thevariable frequency water pump and the heating module in the circulation device, a flow sensor, a second temperature sensor, the control module and the first temperature sensor on the one-way valve assembly form a closed-loop control system, and the problems that the water heater is frequently started, and hot water and cold water mixing in pipes is prone to happening are solved.

Description

technical field [0001] The present invention relates to a circulation system used in conjunction with a water heater and a control method thereof, in particular to a system capable of effectively avoiding frequent start-up of the water heater (especially suitable for the use of a water heater without a return pipe), and capable of preventing hot and cold water pipes from being switched on immediately. An instant hot water circulation system and a control method thereof. Background technique [0002] At present, there are instant water heaters on the market. The basic principle is to add a water pump to the pipeline in the ordinary water heater, and use the water pump to circulate the hot water cooled in the hot water pipe, thereby triggering the water heater to start heating, realizing the pipeline "Zero cold water" function. In addition, the hot water circulation device commonly used in the market for gas water heaters also uses the above principle to work. The difference ...

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Problems solved by technology

If the customer chooses manual start or remote start, they have to wait for a period of time for the pipeline to complete preheating, and the experience of the instant heat function will be affected

However, if the appointment function is used to ensure instant heating within a selected period of time, there are requirements for the installation position of the temperature sensor in the hot water circulation device (the corresponding functional module in the water heater), and it is installed at the end of the hot water pipeline. It is obviously the best choice, but in fact, due to the limitation of distance and structure, the temperature sensor is installed in the cold water pipe or the return pipe in many cases. These places cannot truly reflect the temperature of the hot water pipe, which will cause circulation. Misstart of the device, resulting in frequent start of the water heater, reducing the life of the water heater, and causing a lot of waste of energy

[0004] Especially for a large number of users who have renovated houses without return water pipes, if the temperature sensor is arranged in the cold water pipe, the use of the reservation mode will not only cause the water heater to start frequently, but also cause the hot water in the hot water pipe to enter. To the cold water pipe, there is no cold water available, and it will also make the water in the cold water pipe produce peculiar smell

For customers who have installed water purification equipment, it may even cause damage to the water purification equipment

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