Backpack Converter

Name: Backpack Converter Manufacturers & Suppliers | HENGLI
Brand: HLTNC
SKU: 286814269

Backpack type constant pressure water supply frequency converter - backpack converter is a high-efficiency variable frequency control device designed specifically for water pumps. It is installed in a backpack style, making it easy to use in space limited situations. Suitable for 0.75-11KW motors, supporting 220V 380V power supply. Effectively stabilizing water pressure, energy-saving operation, and reducing mechanical impact caused by pump start stop. Commonly used in household water supply, small industrial systems, or temporary water supply scenarios, it has the characteristics of easy operation and high protection level.

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Product Introduction

I. Product Overview

Developed by Lishui City Hengli Automation Technology Co., LTD, this intelligent control device is specially designed for water supply systems, aiming to achieve stable water pressure control and energy-saving operation. It is suitable for water supply needs in scenarios such as residential buildings, commercial stores, and small-to-medium engineering projects.

The backpack converter can automatically switch between constant pressure and speed regulation modes. When connected to a pressure sensor, it precisely adjusts the water pump motor speed to maintain constant water pressure. It supports accurate pressure parameter setting and is equipped with practical functions such as sleep delay and water pump anti-seize startup, effectively avoiding idling losses.

II. Product Introduction & Feature Summary

(1) Fundamental Operating Principle

The core of this product is based on the PID closed-loop control algorithm. Through AVI/ACI terminals connected to remote pressure gauges or pressure transmitters, it collects real-time pressure signals from the water supply system and feeds them back to the controller.

The controller compares the feedback value with the set pressure value, automatically adjusts the output frequency, and changes the water pump motor speed to achieve precise and constant water pressure. Meanwhile, the backpack converter supports switching between constant pressure and speed regulation modes. When there is no sensor, it automatically switches to speed regulation mode to ensure continuous system operation, fundamentally reducing water pressure fluctuations and energy consumption.

Backpack Converter Principle

(2) Core Selling Points & Advantages

Strong Adaptability: Supports dual-voltage power supply (220V single-phase via L1/L2 terminals and 380V three-phase via R/S/T terminals) with a power range of 0.75KW-11KW. Compatible with household small scenarios and small-to-medium engineering projects, no additional adaptation equipment is required.

Easy Operation & Maintenance: The 5-digit LED panel intuitively displays frequency, pressure, fault codes, etc. Parameter setting can be completed through "Menu/Confirm/Shift" keys, with one-key reset for faults, allowing non-professional personnel to quickly get started.

Comprehensive Safety Protection: Equipped with multiple protections including water shortage, PID disconnection, overvoltage, undertemperature, phase loss, and overload. Combined with an oscillation suppression function, fault codes are easy to understand, greatly reducing the risk of equipment damage.

Flexible Communication & Expansion: Supports RS485 communication, compatible with Delta M protocol and MD380 protocol. It can realize 16-device online linkage with an adjustable communication baud rate, adapting to the remote control needs of complex water supply systems.

(3) Functions & Selection Recommendations

1.Core Functions

Precise Pressure Adjustment: Supports sensor range selection of 0.1-60.0bar, with a fine-tunable startup pressure difference and shutdown disturbance range.

Practical Operation Functions: Includes sleep delay, water pump anti-seize startup, anti-freezing protection, etc., suitable for different working conditions.

Multiple Control Methods: Supports panel control, communication control, and terminal control. The frequency source can be digital given, analog given, or communication given.

2.Selection Recommendations

Backpack Converter selection

Small-flow Scenarios (Households/Commercial Stores): Choose models with a power of 0.75KW-3.7KW, matched with a 220V power supply and voltage-type sensors (0-5V).

Water Supply for Small-to-Medium Engineering/Buildings: Select models with a power of 5.5KW-11KW, adopting a 380V three-phase power supply and current-type sensors (4-20mA).

Multi-pump Linkage Scenarios: Prioritize models supporting the online function, and cooperate with RS485 communication to achieve multi-device collaboration, improving water supply stability.

III. Supporting Products & Applications

(1) Supporting Products

It can be used with three-phase water pumps, remote pressure gauges, and pressure transmitters. When connecting external peripheral equipment such as filters and reactors, it has excellent compatibility and simple wiring specifications, making it an efficient and stable water supply control solution.

(2) Application Scenarios

Residential Water Supply: Suitable for villas, detached houses, and small-to-medium residential communities, solving problems such as insufficient water pressure in high-rise buildings and fluctuating water temperature during peak water usage. For example, European and American households often use it with booster pumps to achieve stable water supply, and it is also used for villa garden irrigation and swimming pool water circulation in some regions.

Commercial & Public Buildings: Widely used in hotels, office buildings, schools, hospitals, and gymnasiums to ensure continuous and stable water supply in guest rooms, classrooms, wards, and other scenarios. For instance, Southeast Asian hotels use it to meet water demand during tourist seasons, while European hospitals rely on its protection functions to adapt to humid environments.

Light Industrial Water Supply: Suitable for process water supply in light industries such as food and beverage, and pharmaceutical and chemical industries. For example, North American food factories use it to control the water pressure of raw material transportation, and European pharmaceutical factories rely on its precise PID adjustment to ensure sterile water supply; it is also used for temporary pressure boosting in construction sites to meet construction water needs.

Outdoor & Special Environments: Such as Australian farm irrigation, urban and rural water supply in Africa, and outdoor construction sites in the Middle East. With rainproof (IP54/IP55 protection), rust-proof, and anti-freezing functions, it operates stably in dusty, high-temperature, and humid environments, reducing manual maintenance costs.