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The plate heat exchanger unit is a type of heat exchange unit that features the use of plate heat exchangers. Under the same pressure loss conditions, its heat transfer coefficient is 3-5 times higher than that of tube heat exchangers; it occupies one-third of the space required by tube heat exchangers, and its heat recovery rate can exceed 90%. Working principle: Steam or hot water, under the control of a temperature control valve, is supplied to the plate heat exchanger unit at the flow rate required by the heating system. The heat exchanger uses indirect heat exchange to heat the return water used for heating (or air conditioning) by end-users; the water to be heated first passes through a stainless steel core strainer, then enters the heat exchanger via a circulation pump, is heated there, and is subsequently supplied to the users, in a continuous cycle. The primary heat medium returns to the primary heating network after heat exchange in the plate heat exchanger unit. The water loss in the system is automatically replenished by the make-up water pump at a set pressure, ensuring stable system pressure and normal operation. A heat exchange unit consists of a plate heat exchanger, an intelligent temperature control device, an intelligent electrical control device, a circulation pump, a make-up water pump, a pressure-stabilizing expansion tank, a make-up (condensate) water tank, filters, valves, instruments, sensors, piping supports, and other components. Applications of heat exchange units: These heat exchange units feature high efficiency, energy savings, intelligence, and automation. They can be widely used in civil buildings such as factories, government offices, schools, residential complexes, and villas, as well as in commercial buildings like shopping malls, hotels, restaurants, and resorts for heating, air conditioning, hot water supply, domestic water use, and maintaining swimming pools during winter. They can also be utilized to produce water required for industrial production processes, as well as in various locations where heat exchange is needed. Features of the heat exchange unit: 1. This unit features an optimized design, a rational layout, a compact structure, small floor space, which reduces civil engineering costs; it is also easy to install and maintain. 2. This heat exchange unit employs advanced control technologies, featuring a high degree of intelligence and automation; it is easy to operate and can function unattended. 3. This heat exchange unit features automatic water make-up and automatic pressure regulation; the make-up water pump can operate in fully automatic mode or be controlled manually. 4. All equipment components of this unit are high-quality products; efficient plate heat exchangers are used, ensuring rapid and effective heat exchange, energy savings, easy capacity expansion, and simple maintenance. The overall configuration is advanced and rational, with excellent control. Unit advantages 1. The plate-type heat exchange unit features automatic start and stop based on a set schedule. Timed on/off control can be achieved based on time, date, and different time periods. 2. Automatic timed switching of the backup circulation pump and heat exchanger. The circulation pump switches on a timed basis, and automatic switching occurs in the event of a pump failure; the main plate heat exchanger and the backup plate heat exchanger switch back and forth on a timed basis, thereby maximizing the system’s service life. 3. Automatic switching between power frequency and variable frequency. The system collects temperature and pressure signals to control the frequency conversion of the circulation pump and make-up water pump. It can automatically enable frequency conversion switching between multiple circulation pumps and multiple make-up water pumps, as well as automatic switching between frequency conversion mode and normal frequency mode. 4. Compared with intelligent heat exchange units, plate heat exchange units feature a simpler, more intuitive and user-friendly human-machine interface, making them easy to operate. Equipped with a touch screen, the system will feature a user-friendly interface that displays the overall operating status of the system, the current condition of the equipment, as well as various thermal and operational parameters, all of which are shown in numerical form. It can be controlled locally or connected to a central control room, enabling users to monitor it remotely. 5. The plate-type heat exchanger unit features powerful remote communication capabilities. It can be connected to a host computer via wired or wireless means. It enables both local network control and wireless monitoring. When a fault occurs, a wireless alarm signal is sent immediately to the administrator’s phone, allowing for prompt maintenance of the system.