Instant heating circulation system suitable for water heater and control method of instant heating circulation system

Abstract

The invention relates to an instant heating circulation system suitable for a water heater and a control method of the instant heating circulation system, and solves the problems that a water heater is frequently started, and hot water flows into a cold water pipe and the like in the prior art. According to the technical scheme, the system comprises a pipeline, a circulating water pump, a circulating water pump and a flow detecting element, the pipeline is connected with the water heater, and the pipeline comprises a cold water pipeline or a hot water pipeline; the circulating water pump is arranged on the pipeline; the temperature control valve element is connected to the hot water pipeline and the cold water pipeline; the flow detecting element is installed in the pipeline and is in signal connection with the circulating water pump; the temperature control valve element is a self-operated temperature control stop valve. The instant heating circulation system has the advantages that hot water in the hot water pipe is prevented from being flow into the cold water pipe through the self-operated temperature control stop valve; the flow detecting element is used for detecting whethera circulation pipeline formed by the cold water pipeline and the hot water pipeline is smooth or not, and invalid operation of the circulating water pump is avoided; the self-operated temperature control stop valve and a one-way valve mounted at the cold water end is used for ensuring the stop valve can be opened and closed through the temperature of the tail end of the hot water pipeline in realtime, frequent starting of the water heater is avoided.

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 user chooses to start manually or remotely, he must wait for a period of time for the pipeline to complete the preheating, and the experience of the instant heating 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 (functional module set 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, in most cases, the temperature sensor is installed in the cold water pipe or the return pipe. 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, when the reservation mode is used to start, it will not only cause the water heater to start frequently, but also cause hot water in the hot water pipe. Into the cold water pipe, there is no cold water available, and it will also cause the water in the cold water pipe to produce peculiar smell

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

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