A water-saving intelligent constant temperature and constant current bathing system

Abstract

The present invention proposes a water-saving intelligent constant temperature and constant current bathing system, which can firstly introduce the stored water in the hot water pipe that is lower than the preset temperature T0 into the water storage tank 2, and wait until the hot water temperature in the hot water pipe is reached. When the preset temperature T0 is exceeded, the water in the storage tank 2 is exported and mixed with hot water and cold water to save water; the algorithm is used to control the hot water pipe valve and the cold water pipe valve to control the temperature of the liquid, so as to achieve the correct temperature. To control the effect of constant water temperature during bathing, the mixed algorithm is applied to the position-type double-object three-stage serial PID control algorithm; in this system, a small pressure pump 7 is used to control the flow rate of the liquid in the shower during bathing, so as to achieve a constant control of the water flow rate. The effect is that the incremental PID control algorithm is used to control the flow rate. In addition, the system uses a low-power Bluetooth 5.0 chip as a wireless data transmission medium, which is easy to access to smart home systems and smart phones and other devices, and has a warning function.

Description

technical field [0001] The invention relates to a water-saving bathing system, in particular to a water-saving intelligent constant temperature and constant current bathing system. Background technique [0002] At present, in areas represented by southern China, in household bathing and other practical applications that require hot water cleaning, due to the large amount of low-temperature storage water in the hot water pipe, a large amount of cold water will be released before bathing, resulting in water Waste of resources. Secondly, a large amount of water resources will be wasted when adjusting the water temperature of a suitable temperature, and because the temperature of the hot water provided by the domestic water heater will fluctuate, the water temperature during bathing will fluctuate; For mechanical mixing valves, the water flow is affected by the pressure of the water in the pipe. When the water pressure changes in other parts of the home or other reasons, the te...

AI Technical Summary

Problems solved by technology

[0002] At present, in areas represented by southern China, in family bathing and other real-life applications that require hot water cleaning, since there is a large amount of low-temperature water stored in the hot water pipes, a large amount of cold water will be released before bathing, resulting in water waste of resources

Secondly, when adjusting the water temperature of the appropriate temperature, a large amount of water resources will be wasted, and the temperature of the hot water provided by the household water heater will fluctuate, which will cause fluctuations in the water temperature during bathing; and because the household bathing system is based on the traditional With a mechanical mixing valve, the water flow rate is affected by the pressure of the water in the pipe. When the water pressure changes in other places in the home or other reasons, the temperature and flow rate of the bath will be greatly affected, which greatly affects the bathing experience.

Patent No. CN 108589834A proposes an intelligent water-saving one-button start constant temperature bathing system. After the cold water in the pipeline is introduced into a water storage tank and mixed with hot water, the part of the water is diverted to the main pipeline through an injection mixer. At the same time, this system also uses a single-chip microcomputer to control cold and hot water low-pressure solenoid valves, and the temperature sensor is used to control the bathing temperature in a closed-loop manner. Users only need to set the bathing temperature to bathe without waiting; this system also includes WIFI modules, The WIFI module can upload bathing, which is convenient for the control of the smart home system, and solves the problems of cold water before bathing in the bathing system, waste of water resources, and poor system experience.

The design of the device is still not perfect, for example, there is no corresponding control for constant water flow, and only single closed-loop control is used for water temperature control, and the control of temperature and water flow speed cannot be connected in series. Based on this, the control system and method for the intelligent bathing system still needs improvement

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