Heaters

Applicable Places: Water-cooled chillers have the advantages of high efficiency, low noise, reasonable structure, simple operation, safe operation, convenient installation and maintenance, etc. Water-cooled chillers are widely used in the comfort central air-conditioning systems of public facilities such as hotels, shopping malls, office buildings, exhibition halls, airports, and gymnasiums. Water Cooled Scroll Chillers Features ● Wide Selection Range This series of units has a cooling capacity range of 75KW~3350KW, and there are a variety of specifications to choose from. Each specification of the unit has two control modes: ordinary computer control and luxury computer control. It can undertake non-standard products such as low-water-temperature ethylene glycol water-cooled chillers. - Single Compressor Series - Double Compressor Series (Single Evaporator Type) - Four Compressor Series

In the past, traditional measures for winter heating or insulation in aquaculture were mainly boiler heating, insulation equipment, etc. With the development of the heat pump industry, some aquaculture owners have begun to use this new type of heat pump constant temperature unit to create suitable conditions for their aquaculture. In the application of aquaculture, the aquaculture water is not directly heated, but the water heated by the heat pump unit passes through the auxiliary equipment laid in the pool to slowly heat up the aquaculture water body using the principle of heat transfer. At present, the boiler heating and combustion commonly used in aquaculture has high energy consumption and is accompanied by a large amount of toxic and harmful exhaust gas emissions. Constant temperature aquaculture equipment can solve the above problems well. The water source heat pump constant temperature aquaculture unit is efficient and energy-saving, in line with the development trend, and can also save energy costs for farmers. At the same time, the water source is green and pollution-free, safe to operate, can maintain temperature well, is easy to operate, and does not require special supervision, which is not only conducive to the growth of aquaculture but also saves a lot of labor costs.

Applicable Places: Normal Temperature Air Source Heat Pump is widely used in comfortable central air-conditioning systems of public facilities such as hotels, shopping malls, office buildings, exhibition halls, airports, gymnasiums, etc., and can meet the different usage requirements of process air- conditioning systems in electronics, pharmaceuticals, biology, textiles, chemicals, metallurgy, electric power, machinery. Technical Parameter Table Normal Temperature Air-Cooled Chiller (Hot Water) Unit Performance Parameter Table Unit Model CTEFMR65A CTEFMR140A CTEFMR280A Cooling Capacity 65 kW 140 kW 280 kW Heating Capacity 68 kW 150 kW 300 kW Power Supply Three-phase 380V 50Hz Total Input Power 20.8 kW 43.8 kW 87.6 kW Compressor Type Fully Closed Rotary Refrigerant Material R410A Control Method Electronic Expansion Valve

The Air Series Ground Source Heat Pump Unit system does not emit any exhaust gas, wastewater, or waste residue to the outside world during operation, which is an ideal "green air conditioner". It saves 40% more energy than traditional air conditioners and 48% more efficiency than gas furnaces. The energy efficiency ratio of the whole machine is above 4.0. Applicable Places: Small places such as villages, towns, rural areas, villas, etc. that need cooling and heating. Core Advantages Cost Saving ● Initial Installation Cost Saving ● Operation Cost Saving ● Installation Time Saving

The induction heating and quenching machine tool is one of Duolin complete sets of induction hardening equipment.The Vertical or horizontal machine tool is mainly used to process shafts parts, gear, bar and also can quenching some special workpieces. Technical information It is suitable for matching with high frequency, medium frequency induction power supply.The CNC hardening machine adopts liquid spray cooling method and can meet the general hardening requirements of the manufacture or heat treatment shop.The CNC scanner is servo mechanical drive and automatic quenching process.It is mainly used for metal hardening, but can be also used for annealing or welding heating process, with manual and automatic function, simple operation and easy to handle. Set hardening program parameter, like heating time, cooling time, rotate time, cooling capcacity etc, to get different hardeness and depth layer when parts drawing changed. Induction Hardening Machine Feature 1: Welding and Door frame structure, special design for heavier hardening part 2: Spindle design, ensure the accuracy and load requirements of workpiece rotation. The rotation adopts frequency conversion speed control, which can be manually adjusted or set through the numerical control screen, equipped with position chuck, which can easily clamp workpieces with the largest diameter. 3: Variable frequency speed regulating motor to rotate the quenching part, protect the motor from wet environment 4: The quenching transformer moves through the linear guide rail, and its movement is controlled by the servo motor driven by the lead screw. 5: It can accurately realize the speed change of preheating, heating and heat preservation, and the heating process is set and implemented by the numerical control program to maximize the overall quenching quality of the workpiece 6: Tranformer move by servo motor, position by digital input, accurancy 0.01mm, speed range 150mm/s 7: The CNC system does not require travel switches and time relays. The loading and unloading positions, heating positions, cooling positions and heating distances are all accurately positioned by servo motors. Quenching time, lifting speed, rotation speed, etc. can be directly input and controlled from the CNC panel. 8: More than 60 quenching programs can be stored for users to call at any time. It is especially suitable for complex process requirements such as multi-stage, variable speed and many types of workpieces. 9: Easy to installation and operation, convenient maintenance. The main parts are made of Taiwan mechanical and electrical products, with long service life and low maintenance cost.

Ultrasonic induction heating equipment IGBT inverter used, high efficiency and low energy consumption Can work continuously with 100% duty cycle and set up 100% at any load Can replace convention heating method such as heating by flame coal salt bath gas and oil Work frequency 10-30Khz, power 30-250KW Digital display and compact design, light weight, easy for installation and operation Soft switch technology and prefect protection system enhance good reliability. Can equipped with infrared temperature detection system (Optional) Water cooling system, chiller is available Induction Heating Machine Application For bar end or head preheat before hot forging for bolt nut and fastener produce, below table for reference only. Hardening: For gear shaft pin or other metal parts heating, need to know hardness and depth Brazing long bar thread bar heat treatment Pipe heating for elbow produce, hot bender Why Choose Us? 1. More than 20 years of experience in induction heating industry. 2. Free test for choosing the machine model before purchase. 3. Product design research develop and maintain by the Duolin Engineer team, machine lifetime service. 4. Test the machine as customer heating requirements and aging more than 6 hours to guarantee the good quality. 5. Offer installation manual and troubleshooting guide. 6. Use famous brand components Infineon Omron Schneider to ensure quality of material.

Power: 100--1000KW Work Frequency: 0.5-10Khz Application: For billet partial and total hot forging Turnkey induction heating system, including the induction power supply, heating furnace, water cooling system, automatic steel bar feeding, infrared sensor, bar sorting system, easy to put into hot forging production line. IGBT Induction Heating Machine Technical information 1. Good start up performance: IGBT MF induction power supply apply series resonance technology so it can be starts up 100% under any condition. 2. Less indterface to power grid: Less harmonic current and high power factor, Power factoer remaining 0.95 above during machine running. 3. Low energy consumption: in series resonant circuit,voltage at inductor high and current low so energy loss is very low; Soft switch technology applied then switch loss is very low. 4. Water cooled by heat exchanger: Using distilled water as circulating water to avoid sediment and clog of hose. 5. Good reliability: IGBT is a self turn-off transistor that ensures incersion with suvvess and takes protection instantly; IGBT used form Infineon world- renowned manufacturer. 6. High conversion efficiency more than 97.5%: IGBT(Insulated Gate Bipolar Transistor)inversion technology. 7. Energy saving up to 15%-30% compared with SCR technology induction machine: LC series resonance circuit and voltage feedback design, low energy comsumption. 8. Cooper &stainless steel fasteners and radiator, better cooling and anti- electrolysis. Medium Frequency Induction Heating Machine Feature 1: For billet full preheating or local induction heating before hot forging or forming, diameter range wide up to 200mm. 2: Pneumatic pusher, chain delivery system, pick up system three channel and Infrared thermometer system are available. 3: Well designed winding process and high quality copper tube brings result of high efficiency and energy saging. 4: Quick change connection enables replacement heating furnace conveniently. 5: PLC to realize the automatic, save labor and improve the production.

Power 30-300KW Work  Frequency 50-250Khz Digital display Constant power and current output Safe,Low voltage output PLC interface available for automatic work Wide inductance to connect with different heating coil 8 fault indicators to protect machine Water cooled induction power unit and transformer 1. Good start up performance: IGBT MF induction power supply apply series resonance technology so it can be starts up 100% under any condition. 2. Less indterface to power grid: Less harmonic current and high power factor, Power factoer remaining 0.95 above during machine running. 3. Low energy consumption: in series resonant circuit, voltage at inductor high and current low so energy loss is very low; Soft switch technology applied then switch loss is very low 4. Water cooled by heat exchanger: Using distilled water as circulating water to avoid sediment and clog of hose. 5. Good reliability: IGBT is a self turn-off transistor that ensures incersion with suvvess and takes protection instantly; IGBT used form Infineon world- renowned manufacturer. 6. High conversion efficiency more than 97.5%: IGBT(Insulated Gate Bipolar Transistor)inversion technology. 7. Energy saving up to 15%-30% compared with SCR technology induction machine: LC series resonance circuit and voltage feedback design, low energy comsumption. 8. Cooper & stainless steel fasteners and radiator, better cooling and anti- electrolysis. 9. Integrated design with water cooler, inductor, feeding system and three chanel sorting system, infrared sensor,less space for installation. 10. Good reliability, prefect protection system, reliable components, soft switch technology. 11. Customized local input power, 400V+/-10% 50Hz or 600V 60 Hz. 30-50KW High Frequency Induction Heating Machine Technical Advantage 1. Research, design and produced under ISO 9001:2015 by Duolin team, quality and delivery time under control. 2. Machine cabinet sealing,protect the induction heating equipement under complex working environment. 3. Door switch design for safety. 4. Less interference to the power grid, do not need compensation capacitor: High power factor-more than 0.95. 5. Induction heating equipment start under any condition 100%. 6. DSP and HMI technology, display the machine work data and indicate the fault output. 7. 0-10v or 4-20ma signal offered for automatic production line. 8. Intelligent control system,PLC control, connect with factory MES system site management, provide base for modern management of enterprises. https://www.duolin.com/

Under background of industry 4.0 and customer new request for saving the labor, full and semi-automatic production become the new trends in manufacturing industry. Duolin helped our customer for transforming the manual production line to automatic with PLC and robot,especially in hot forging fasteners and gear auto parts and other metal parts induction heat treatment industry. Automatic high frequency induction line has advantage below 1:‌ Improve production efficiency‌: Through precise robotic arms and advanced control systems, automated production lines can realize automatic cutting, grinding, assembly and testing of raw materials, thereby greatly improving production efficiency. Compared with manual operations, automated production lines can work 24 hours a day without interruption, flexibly adjust production plans according to market demand, and ensure that products can be delivered to customers in a timely manner‌ 2:‌ Ensure product quality‌: The introduction of Custom Induction Heating Equipment ensures the stability and consistency of product quality. Robotic arms and control systems can accurately perform operations in each production link, thereby effectively ensuring product quality. In addition, automated production lines can also collect and analyze data in the production process in real time, providing strong support for production management and quality control‌. 3:‌ Improve working environment‌: Automated production can effectively prevent employees from being exposed to high temperature, high humidity, dust, noise and other adverse production environments for a long time and at close range, reduce employee work intensity, reduce the occurrence of work-related accidents, and improve employee health‌. 4:‌ Reduce production costs‌: Automated production lines can replace manual labor to perform large-scale, repetitive and dangerous production actions, effectively improving labor productivity. At the same time, automated production can also reduce labor costs and solve the dilemma of enterprises' difficulty in hiring workers. 5:‌ Improve safety‌: Automated production lines reduce manual operations, thereby reducing safety hazards. Robot and control systems can replace workers to complete some heavy and dangerous work, reducing equipment failure rates and maintenance costs. 6:‌ Intelligent control‌: The application of technologies such as intelligent temperature precision control and synchronous three-stage sorting system enables automated production lines to achieve more refined production control, avoid the outflow of unqualified materials, and improve overall production quality and efficiency. If you have any demand for induction heating production line, don't hesitate to contact Duolin team, we will offer you professional solution.

Medium frequency generators are widely used in various industrial applications for their high efficiency and ability to generate high-quality power.  110kw Induction Heating Generator Application: 1, Standard parts heating forging 2, Smelting of various metal materials 3, Motor rotor heating match 4, Steel pipe end heating tube expansion 5, Mold diathermy 6, Shaft intermediate frequency quenching 7, Weld preheating or tempering after welding MAIN FEATURES Guidance before Order: 1, We only have medium frequency power supply in stocks. We will match for the proper compensation capacitor and induction coil or heating furnace according to the customer's heating workpiece and heating requirements. Therefore, ordering or consulting customers need to provide the following information: (1) The material and size of the heating workpiece; (2) The use of heating and heating temperature, as well as heating time requirements; Is it diathermy or surface heating? If it is surface heating, what is the depth of heating? And so on (3) There is no limit to the mode and size of the induction coil. Like from the inside or the outside? Closed or open coil? Is there any susceptible metal material within 100MM nearby the induction coil? (4) Are there any specific requirements for frequency? (5) Heating atmosphere: in the atmosphere or in the vacuum furnace? Is there a protective gas? (6) Other details related to the equipment scheme? Contact us

Medium frequency generators are widely used in various industrial applications for their high efficiency and ability to generate high-quality power.  160kw Induction Heating Generator Application: Medium Frequency Induction Heating Machine can do diathermy heating before forging, forming, bending etc for standard parts, fasteners, large workpieces, small hardware, straight shank twist drills, overall and partial heat penetration and hot upsetting and hot rolling of twist drills, round steel with a diameter of less than 100mm. 1. Standard parts heating forging 2. Smelting of various metal materials 3. Motor rotor heating match 4. Steel pipe end heating tube expansion 5. Mold diathermy 6. Shaft intermediate frequency quenching 7. Weld preheating or tempering after welding Medium frequency generators MAIN FEATURES Guidance before Order: 1, We only have medium frequency power supply in stocks. We will match for the proper compensation capacitor and induction coil or heating furnace according to the customer's heating workpiece and heating requirements. Therefore, ordering or consulting customers need to provide the following information: (1) The material and size of the heating workpiece; (2) The use of heating and heating temperature, as well as heating time requirements; Is it diathermy or surface heating? If it is surface heating, what is the depth of heating? And so on (3) There is no limit to the mode and size of the induction coil. Like from the inside or the outside? Closed or open coil? Is there any susceptible metal material within 100MM nearby the induction coil? (4) Are there any specific requirements for frequency? (5) Heating atmosphere: in the atmosphere or in the vacuum furnace? Is there a protective gas? (6) Other details related to the equipment scheme?

The induction boiler provides instant hot water. Magnetic induction water heater requires no chimney, is easy to install, compact in size, operates at 100% efficiency, and runs quietly. It is a popular choice for home or hotel heating needs. Magnetic Induction Water Heater Advantages 1. High efficiency and energy saving: The thermal efficiency is over 90%. Under the same conditions, induction heating can save more than 30% of electricity than the resistance heating method, and some even save 80% of electricity. The preheating time can be shortened.  2. Reliable operation: Multiple closed-loop intelligent control systems and perfect protection systems ensure long-term safe and reliable operation of the equipment.  3. Reduce production costs: The heating part adopts a cable structure. The heating cable itself does not generate heat and has a long service life. Magnetic induction hot water heater avoids the need for frequent maintenance and periodic replacement of the heating coil for resistance heating, and there is basically no maintenance cost in the later period.  4. Improve working environment: The heating part has less heat dissipation, and the surface can be touched by hand, which improves the environmental conditions at the production site.  5. Intelligent multi-temperature zone control: The induction room heater uses a LCD screen to display the real-time temperature and set temperature range. The built-in chip can intelligently control the heating speed and output power, and can be flexibly adjusted according to the actual situation. Ultra-high temperature heating electromagnetic heating coils have been applied to manufacturers of plastic products, plastic films, pipes, profiles and similar industries, and have achieved good results. They have the characteristics of convenient installation and strong interchangeability. Better economic benefits than ever.

Descriptions Main features of "ZG-Hitfar" bearing electromagnetic induction heaters: 1. Quick setting of temperature; 2. Real-time temperature display; 3. Automatic over-temperature protection; 4. Automatic heat preservation, etc. APPLICATION The bearing induction heaters are mainly used to heat various types of metal parts such as bearings, gears, bushes, shaft sleeves, diameter rings, pulleys, shrink rings, connectors, etc. The bearing heaters expand by heating to achieve interference The need for assembly. Functions include: quick setting of temperature, real-time temperature display, automatic over-temperature protection, automatic heat preservation, etc. The Structure & Working Principle of Bearing Induction Heater The bearing induction heater is a kind of air-cooling frequency induction heating device, which is composed of induction heating main control, yoke steel, temperature controller & sensor and other accessories. The purpose of heating the bearing is to cause the bearing to produce thermal expansion, so that the bearing can be smoothly sleeved on the shaft. In fact, the working principle of bearing heater is applied electromagnetic induction heating, which is actually the use of magnetic fields. When we put the bearing on the yoke steel, the circuit is closed and a magnetic field is formed. The heated work piece is a equivalent to a resistance. The current in the magnetic field will accumulate every time it passes through the resistance. As a result, the workpiece is also heated. The Advantage & Feature of Bearing Induction Heater - Safe, clean and environmentally friendly Traditional methods, such as live roasting, oil bath, oven roasting, are not only costly but also produce coke smoke, odor and waste oil. The application of induction heaters can replace traditional methods to create a safe and clean working environment. - Fast and without damage After heating, the bearing expanded outward in the cylindrical direction, which can avoid damage during installation. Induction heating is an excellent heating method, and it does not need to be preheated. The bearing can be heated to 120°C in a few seconds or minutes without damaging the pre-lubrication. - Rational design In order to meet the requirements of the industrial environment, the design concept of induction bearing heater for sale is modernization, rationalization, easy operation and high durability. Portable bearing heater is a convenient heater to facilitate the on-site use.

Variable frequency induction heating water heater, is high frequency of electromagnetic induction heating, water and electricity separate completely. Induction geyser has never leakage by using the anti-electric wall and leakage protection switch. It equips with intelligent automatic temperature control operation to avoid electric bar leakage and other unsafe factors. The working principle of electromagnetic induction geyser Induction heating water boiler is based on the principle of electromagnetic induction heating. It uses AC rectification to DC power and then inverts it into high-frequency alternating current. Induction geyser acts on the induction coil to generate an alternating magnetic field. The induction heater body generates countless small eddy currents. The heating furnace (here refers the steel pipe with water passing through) is heated by eddy current collision body, so that the water in the furnace can be heated. There is more than 20mm of insulation material between the water and the coil, but the thermal efficiency can reach 97%, environmental protection and safety, short warm-up time, and fast heating speed. HITFAR electromagnetic induction water heating systems include: frequency conversion electromagnetic heating controller, intelligent operation control system(PLC), electromagnetic induction heating coil, heater body and protection circuit. Please check the below diagram for your kind references! Main Features of 4-15kw Household Use Style, Wall Mounted Type 4KW~15KW 220V-1P Induction Water Heater : 1. No high voltage leakage: water & electricity seperated completely 2. 4-segment programmable timing function 3. Standard modbus RTU communication protocol 4. Touch Screen & PLC 5. World famous brand Infineon IGBT frequency conversion technology 6. Up to 30 kinds of protection functions 7. Perfect reliability design 8. No noise pollution at all 9. No air pollution at all 10. Energy Saving at least 30% than traditional boilers