HZH constant pressure frequency conversion water supply equipment is a new type of water supply equipment that combines microcomputer technology, inverter technology and Motor control technology. It is an ideal product to replace high-level water tanks and towers. It is the development and supplement of the air pressure water supply equipment. The equipment consists of a programmable controller, inverter, control circuit and the motor pump closed-loop water supply control system can fully meet the water supply system pipe network to maintain a constant pressure, making the entire water supply system always maintain the best energy-efficient operating conditions . HZH constant pressure frequency conversion water supply equipment has a dedicated life water, fire dual-purpose life water supply, constant pressure water pressure and Other systems. Constant pressure water supply equipment can be equipped with constant pressure water supply inverter, and the use of fuzzy control theory to make the system more reasonable operation. In addition, the equipment is equipped with "automatic" "manual" switch for the user to choose; extend the life of pumps and motors, no water hammer phenomenon, the motor frequency of soft start; extend the life of the pipeline, when not using water or water more Small cases, reducing the pressure on the pipe network, making the pipe network is not easy to break, which greatly saves the pipeline maintenance costs; canceled high water tower or water tank, pressure tank. On the one hand to solve the problem of secondary pollution of water, on the other hand to save the construction cost of building them; saving generally up to 30%. Because residential water consumption is changing over time, and ZBH constant pressure water supply equipment can be based on changes in water consumption, automatically changing the pump speed or increase or decrease the number of pumps to achieve constant pressure water supply to achieve the purpose of saving; automatic control to overcome the artificial Control may be caused by misuse, while greatly reducing the labor intensity and the number of workers, and remote control and remote monitoring; full-featured. A variety of protection features: overload, overheating, overvoltage, undervoltage, overcurrent, lack of equality. Various working conditions have indicators show. Scope of application: Water users from the water company's water supply system. For example: urban high-rise buildings, residential district water from the surface or pool water users. For example: with deep well pump or submersible pump water directly from the ground below the user heating system boiler pressure constant pressure water system. Because of its reliable performance, simple structure, convenient operation and low investment, it is widely used in small and medium-sized regional water supply systems in industrial and mining enterprises, urban and rural areas, especially suitable for water source for self-owned wells, underground pools and reservoirs. Equipment has more than 10 years of history, there are now hundreds of sets of equipment in operation, users are welcome to continue to use the product, we will be happy to help you. Constant pressure water supply equipment Pressure water supply equipment is an automatic water supply pipe network adjustment device in the system to ensure that the pressure in the water supply system needs a certain volume of regulation, it has a similar function with the water tower or high water tank, so Called the tower without water pressure tank. Air pressure water supply equipment, the use of air compressibility, in the water pump directly to the water supply system, set up a pump connected with the water supply pipe network pressure tank. When the water consumption is less than the pump water, the tank water level rise, which compressed air pressure so that when the pressure reaches the upper limit of the pressure controller, automatically cut off the power, the pump stops working. At this point the air in the pressure tank continues to pressure the tank into the water supply network. As the tank water level continues to decline, the pressure drops to reach the lower limit of the pressure controller, automatically turn the power on again to turn on the pump, to the pressure tank and pipe network water supply, so that the cycle to the pipe network uninterrupted water requirements. When the pump stops working, the water level in the gas tank drops, the outside air enters the gas tank through the suction valve, and is pressed into the gas tank when the water pump is started to achieve the purpose of automatic gas supplement. The scope of application · Domestic water supply; · Industrial water, in particular, requires constant pressure of production water; · High-rise buildings, living quarters, military facilities, fire water; · Old water supply system (pressure, water towers, high water tanks) Pressurized water system. Main features · Computer control, automatic operation, simple management, easy to use, reliable; · Compact structure, small footprint, investment, convenient installation, easy to centralize management; · Fully functional, through the panel to achieve the desired user needs Various functions; * Press the required pressure, according to changes in water to regulate the motor pump speed, the device constant pressure water supply, energy efficient to achieve the purpose of; * Multiple motor pumps can be reliably achieved soft start, greatly extended The life of the equipment; * According to the flow changes automatically completed on the number of pumps for soft-start running, stop the entire process; * With a small pressure tank device, remote pressure Gauge feedback to the controller, so that equipment In the small flow or zero flow can be shut down to further reduce energy consumption and extend the life of the equipment; Complete protection: under-voltage protection, over-voltage protection, overload protection stall prevention, etc .; Operation, automatic inspection and manual inspection function. Energy saving, you can achieve 20% -40% energy saving, to achieve green electricity. Small footprint, less investment and high efficiency. Flexible configuration, high degree of automation, full-featured, flexible and reliable. Reasonable operation, since it is soft and soft stop, not only can eliminate the water hammer effect, and the average motor shaft torque and wear reduction, reducing the amount of maintenance and repair costs, and pump life greatly improved. Since ZBH frequency conversion constant pressure speed control directly from the water supply, reducing the secondary pollution of the original water supply, preventing the source of many infectious diseases. Through communication control, you can achieve unattended, saving manpower and resources. Principle of energy saving The working principle of the pump shows that the flow of the pump is proportional to the rotational speed of the pump (motor), the pump head is proportional to the square of the rotational speed of the pump (motor), and the shaft power of the pump is equal to the product of the flow and the lift. The shaft power is proportional to the cube of the speed of the pump (both the shaft power of the pump is proportional to the cube of the supply frequency). According to the above principle we can see that changing the pump speed can change the pump power. Flow basic formula: QαN HαN2 KW = Q * HαN3 above Q represents the flow rate, N on behalf of speed, H on behalf of head, KW on behalf of the shaft power. For example, if the power supply frequency is reduced from 50HZ to 45HZ, P45 / P50 = (45/50) 3 = 0.729, that is, P45 = 0.729 P50; if the power supply frequency is reduced from 50HZ to 40HZ, P40 / P50 = 3 = 0.512, ie P40 = 0.512 P50. Pumps are generally considered by the water supply system in the design of the maximum operating conditions to consider, and the water system in actual use, there is a lot of time may not be able to achieve the maximum amount of water, the general use of the valve to increase the system to adjust the resistance to throttling, Resulting in the loss of motor power, and the use of frequency converter system can work flat and stable state, by changing the speed to adjust the water supply, and can save energy by reducing the speed of recovery of investment. AC motor rotational speed and the input electrical frequency is proportional to HBP (Q) frequency conversion water supply equipment is based on the above principle, the use of pressure sensors, programmable logic controller, inverter and pump motor and set the pressure based on the closed-loop The automatic control system has the function of controlling the constant pressure water supply of the water pump. The pressure signal is pressed by the pressure sensor according to the pressure signal of the network to be controlled and compared with the set pressure by the microcomputer. The output adjustment parameters are sent to the inverter to control the change of the frequency. When the water consumption is long, the frequency will increase and the number of motor pumps will increase. On the contrary, the frequency will decrease and the number of motor pumps will decrease, which can not only ensure that users can save water but also save energy.
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