Chinese name
Hot air circulation oven
Principle
Fan circulating air
Construction
Angle, stainless steel plate, and cold steel plate
Use
Pharmaceuticals, chemical industry, foodstuffs, agricultural and sideline products
Dimensions
460×640×45
Temperature
50-140℃
Catalog
1 Working Principle
2 Structure
3 Usage
4 Scope of Application
5 Technical Parameters
6 Characteristics
7 Precautions
8 Common Failures
9 Configuration
10Operating Procedure
11Air Supply Category
Horizontal Air Vertical Air12Circulation System
1Working PrincipleEdit
Hot Air Circulation Oven Air Circulation System adopts the fan circulation to supply the air, which has even and high efficiency in air circulation. The air source is driven by the circulating air supply motor (with non-contact switch) through the heater, and the hot air will be sent out, and then through the air duct to the oven room, and then the air after use will be sucked into the air duct to become the air source to circulate again and heat the use. Ensure the uniformity of indoor temperature. When the temperature value oscillates due to the opening and closing of the door, the air circulation system will quickly restore
Hot Air Circulation Oven
operating status until the set temperature value is reached
2 Structure Editor
Hot Air Circulation Oven is composed of angle steel, stainless steel plate and cold steel plate.
The heat preservation layer is filled with high-density aluminum silicate cotton, which ensures the heat preservation of the oven and the safety of users.
The heater can be installed at the bottom, top or both sides.
The temperature is controlled by a digital intelligent meter.
Hot air circulation oven
There are two kinds of hot air circulation oven air duct design: horizontal air supply and vertical air supply!
3 Usage Editor
Hot air circulation oven is used for heating and curing, drying and dewatering of materials in medicine, chemical industry, foodstuffs, agricultural and sideline products, aquatic products, light industry and other industries. Such as raw materials, traditional Chinese medicine drinking water, extracts, powders, granules, dehydrated vegetables, etc..
4 Scope of application Editor
Hot air oven is suitable for baking chemical gases and food processing to be baked goods, ink curing, paint film drying, etc., widely used in electronics, electrical machinery, communications, electroplating, plastics, hardware, chemical industry, instrumentation, printing, pharmaceuticals, PC boards, powders, containing dip, spraying, glass, wood building materials and so on precision baking, drying, tempering, preheating, shaping, processing, etc.; internal heating, curing, drying and dehydration. It can be used for precision baking, drying, tempering, preheating, shaping, processing, etc.; internal heat circulation, baking objects are heated evenly.
5Technical Parameters Editor
1, heating heat source: steam, electricity, far infrared, electricity and steam dual-use.
2, the use of temperature: steam heating: 50-140 ℃, the highest 150 ℃. Electricity, far infrared heating temperature 50-350 ℃.
3, equipped with automatic control system and computer control system.
4, common steam pressure 0.02-0.8Mpa (0.2-8kgf/cm2).
5, with electric heating according to the I type 15kw, practical 5-8kw/h.
6, special requirements in the ordering show.
7, the use of temperature greater than 140 ℃ or less than 60 ℃, to be specified in the order.
8, the factory factory drying car, drying disk size uniform, interchangeable.
9, the size of the drying tray: 460 × 640 × 45
6 Features Editor
Air supply
1, the hot air circulates in the oven, the thermal efficiency is high, saving energy.
2, the use of forced ventilation, the oven is equipped with air ducts, material drying uniform.
3, the oven runs smoothly. Automatic temperature control, easy installation and maintenance.
4, a wide range of applications, can dry a variety of materials, is the ideal general drying equipment.
Temperature of hot air circulating oven:
Hot air circulating oven has a wide range of applications, can dry all kinds of industrial materials, is a general drying equipment, general hot air circulating
Circulating oven temperature range for room temperature ~ +250 ℃, high temperature type for room temperature ~ +500 ℃.
7 precautions editor
Close the circulating oven air switch, in accordance with the operating instructions for the oven set the heating temperature of 250 ℃, over-temperature alarm temperature of 260 ℃, holding time of 1 h, to start the automatic operation of its program, the oven's circulating fan, into the fan, the disc valve, the heating and other indicators in order, indicating that the program is running normally. Heating operation 2.5 h, the temperature is still not up to the set value, if the heating time is too long, it will cause the heated glass containers are fragile, the rate of bad bottles increased. At the same time, resulting in energy waste, increased power consumption. As well as the oven's work cycle lengthened, resulting in the normal production position of the two-shift system can not be completed on time the process link, a critical error in the process of the production task plan, and improve the production cost. Normal full box temperature from room temperature has been heated to 250 ℃ need 2.5 h, a work cycle needs about 6 h.
Oven, drying oven manual a 1. Before using the necessary attention to the use of the power supply voltage can be consistent. When using, must be the power outlet grounding wire according to the rules to stop grounding.
2. In the use of power, do not touch the left side of the box space electrical parts or wipe with a wet cloth and water rinse, inspection should be cut off the power supply.
3. The power cord can not be wrapped around metal objects, can not be set in low temperature or wet center, to avoid rubber aging caused by leakage.
4. Do not overcrowd the placement of items in the box, the need to leave the atmosphere of natural convection space, so that the humid atmosphere can be decelerated in the wind on the top of the escape.
5. Should regularly reflect the temperature regulator of the silver contacts whether hairy or uneven, if any, can be used to fine gauze will be sanded flat contacts, and then use, and should be often wiped with a clean cloth, so that the contact is excellent (pay attention to the need to cut off the power supply). Indoor temperature regulator of the metal pipeline do not hit to avoid affecting the flexibility.
6. In the drying box without explosion-proof installation, please do not put flammable items.
7. After each use, the power supply must be partially cut off, often adhere to the box inside and outside clean. End of the clean hanging the appropriate signs. See
Oven, drying oven manual II
1. Explosive and flammable volatile substances should not be put into the drying box, lest cause an explosion.
2. The uniform load of the sample shelf should not exceed 20kg.
3. The shelf between the sample chamber and the heating chamber can not be placed on the items, so as not to affect the exchange of heat.
4. Before use must reflect on the nickel wire there is no stacking, short circuit.
5. Heating indicator does not light up, the cause of ordinary three: ① bad bulb; ② poor bulb contact; ③ heating faults.
Electric drying box maintenance and protection: 6. Turn on the heating switch, not heating. Causes are generally four: ① nickel-chromium wire circuit; ② switch and line desoldering; ③ temperature control knob refers to the zero position (rotating the temperature control knob to the specified temperature scale); ④ relay protection.
7. Temperature control failure, the cause of ordinary three: ① temperature probe protection (change thermistor); ② relay protection; ③ temperature control fragmentation of other parts of the problem (measured with a multimeter where the problem is, according to the situation repair).
Oven, drying oven manual three
1. The use of the instrument must have a person in charge, the end of the equipment should be cut off the external power supply, to avoid the occurrence of untoward accidents.
2. The task of placing the specimen in the room, not too dense, lest affect the general activity of the task room airflow, each item must have a gap of 10 ~ 20mm, and symmetrically placed, each shelf on the placement of items to be intertwined, the bottom shelf interval and the bottom of the task room must be a greater than 100mm interval.
3. In the equipment around should leave a certain space, easy to equipment cooling and maneuvering and protection.
4. Avoid sharp, sharp objects scratch equipment.
5. Do not disassemble the electrical components and equipment of the other (parts), lest the protection of the electrical control line, the formation of man-made faults in the equipment and affect its function.
6. When storing and utilizing the equipment, there is no flammable, explosive and corrosive spirit around.
4. No flammable, explosive and volatile substances into the equipment to stop drying disposal.
8. Before using the equipment, please carefully read the "product manual" of Shiman Instruments and equipment, and then stop the manipulation.
8 Common Failures Editor
Understanding the hot air circulation oven heated items placed whether too dense, high temperature filter is blocked, whether the air volume adjustment plate is changed, to rule out these reasons, and then determine whether there is a failure of the circulating fan, resulting in hot air circulation air circulation is not good, hot and humid air can not be discharged normally. Secondly, from the fault phenomenon and oven circuit principle analysis, the oven can be heated, indicating that the GCD a 23A intelligent computer temperature controller output signal is normal, PLC input and output signals are also normal. After the above failure analysis, it can be concluded that the control signal and adjustable components are normal, and then check from the following aspects.
(1) check the GCD a 23A intelligent computer temperature controller PID adjustment parameters, to see whether human error, resulting in the setting of parameter changes, thus making the system abnormal action. PID parameters directly affect the system's regulatory accuracy, is the core of the control system design. Through the appropriate PID parameters, PID control can be based on the error characteristics of the system controlled process, the use of proportional, integral, differential calculation of the system control quantity, get the corresponding output response characteristics, the control system so that it can achieve a satisfactory control effect. Restore the normal setting value of PID parameters. Secondly, detect whether the circulating fan is running normally and whether the steering is correct. If the fan reversal or fan load is too large and too slow, will affect the hot air circulation is not smooth. When the fan reversal, the fan power supply can be any two-phase reversal; when the fan speed is too slow, it should be checked from two aspects: (1) the electrical aspects of the power supply voltage is normal, there is no lack of phase or winding disconnection phenomenon.
(2) mechanical aspects of the sweep, vibration, bearing overheating, damage, loose wind blade rub box shell and other faults. Can be excluded for specific cases. Once again, the solid state relay and heater test whether there is a local disconnection. Solid state relay (SOLIDSTATERELAYS), abbreviated as 'SSR', is a new type of non-contact switching device composed entirely of solid-state electronic components, which utilizes the switching characteristics of electronic components (such as switching transistors, bi-directional thyristors, and other semiconductor devices) to achieve non-contact, non-sparking to turn on and off the SSR successfully realized the control of weak signal (Vsr) to strong power (output load voltage). SSR false connection or conduction after the local disconnection caused by the 380V power supply phase, the heater can not be heated up all the way, the treatment is to repair or replace the solid state relay. The local disconnection of the heater will also prevent the heating from working all the way through, causing the heating process to be too slow. Repair or replace the heater. Take care of the fault problem completely. Close the cycle oven air switch, according to the operating instructions for the oven to run its program, after 2.5h of heating, the oven to reach the set temperature, the time relay began to time, the oven into the intermittent heating of the insulation sterilization stage. Holding 1h after the oven began to cool down, 2.3h after the entire drying and sterilization cycle program run to the end, to fully meet the technical parameters provided by the oven requirements and process parameters.
9Configuration Editor
Overview
Hot air circulation oven, also known as the electric blast drying oven (hereinafter referred to as the drying oven), is an upgraded type of FY841 type, pay more attention to the energy-saving nature of the product and safety, the use of the State Economic Commission focus on the promotion of energy-saving and environmentally friendly heating of the new technology, when it is absorbed by the object to be heated can be directly converted into heat, so that rapid drying effect, to shorten the production cycle, save money, save money. When it is absorbed by the heated object, it can be directly converted into heat energy, thus obtaining rapid drying effect, shortening the production cycle, saving energy and improving product quality. Easy to use, remarkable effect, is an ideal drying equipment with broad prospects. Suitable for industrial and agricultural, medical and health care, plastic machinery, colleges and universities and scientific research departments of the production workshop or laboratory.
Second, structure
The drying box box body is made of angle steel, thin steel plate. Shell and studio filled with glass fiber insulation. The heating system is installed on the top of the studio. This type of drying box equipped with blast can effectively avoid the gradient temperature difference and temperature overshoot phenomenon in the working chamber, and can improve the temperature uniformity in the working chamber.
Three, temperature control
1, this type of drying box with P, I, D control mode of digital display temperature controller, with a thermal element probe composed of automatic thermostat control. Temperature control precision is sensitive, temperature selection, room temperature to 250 ℃, any choice of setting. The temperature inside the working chamber can be read out directly from the meter.
2, timing control: timing range (0S-99.9H), according to the customer's work requirements to choose the control mode (power-on timing or constant temperature timing), to reach the set time automatically cut off the heating, setup can be set directly in the control panel toggle switch, where the code unit: (S seconds M minutes H hours).
Temperature control part is the core part of the electric drying oven, the main sensor will be measured by the temperature signal and the set value to make a comparison. If the value measured by the sensor is lower than the set value, the temperature controller outputs a pulse signal, triggering the SCR control board to conduct, so that the drying box is in the heating state, if higher than or equal to the set value. The SCR stops working and disconnects the heating system. The company's products use PID controller, PID controller contains three basic control laws, namely, proportional (P), integral (I) and emblem points (D) control law, each control law plays a different role, can be applied separately, can also be applied in combination. The controller uses the most effective control method for control objects with large hysteresis characteristics of an anti-integral saturation PID control method that is: when the measured value of the deviation from the set value, the instrument output is constantly heated filament constantly heated until the measured value is equal to the set value. And because of the role of D and make the instrument has the function of over-adjustment, thus improving the dynamic control of the instrument, shorten the adjustment time, and by the LCD display, the sensor for the commonly used Pt100, and has a switching output. From this controller with AC contactor and the original switch, dissolving broken wire, alarm lights, etc. constitute the control circuit road. The AC220V will be connected to the AC contactor "normally open" terminal. By the temperature controller's switching volume control AC contactor suction coil, so as to achieve the purpose of control.
Four, the box part
Streamline arc-type design, the shell is made of cold-rolled steel, surface electrostatic spraying; liner are made of mirror stainless steel; shelves inside the chamber can be adjusted with the user's requirements of the height of the shelves and shelves as much as you want to adjust; EBM fan (10 wind speed adjustment), trace wind circulation, is conducive to drying small or powder related items and make the temperature inside the box More uniform, at the same time make the evaporated water vapor inside the box accelerate to escape to the air outside the box, in order to improve the drying efficiency; Reasonable air ducts and circulation system, so that the uniformity within the chamber of the change is small.
10Operating Procedure Editor
Oven Safety Operating Procedures
The oven should be used in accordance with the temperature range specified on the nameplate, and the oven must be kept well grounded.
No oil pots, oil drums, cotton yarn, cloth scraps and other flammable items should be piled up near the oven, and washing, scraping and spraying paint should not be carried out next to the oven.
To prevent other objects fall into the bottom of the oven and resistance wire contact caused by short circuit.
Before opening the oven, the power must be disconnected. During the heating process manipulation must not leave.
Not in the oven to store items, such as tools, equipment parts and oil volatiles.
After gasoline, kerosene, alcohol, banana water flammable liquid washed parts and painted items, should be placed at room temperature for 15 ~ 30 minutes, to be the vast majority of flammable liquids evaporate before being put into the oven to bake, the room should pay attention to ventilation.
The oven shall not be cleaned while working, and shall not be wiped with gasoline.
Nonmetallic items into the oven to heat, must be carried out in accordance with the process procedures.
The oven dryer must be opened before the work of the ventilation gate to prevent explosion.
Before use, check the automatic control device, indicating whether the signal is sensitive and effective, whether the electrical line insulation is intact and reliable.
PID controller parameters are adjusted as follows:
(1) first pre-select a sufficiently short sampling period to allow the system to work;
(2) only to join the proportional control link until the system's step response to the input critical oscillation, note down the proportionality of the amplification factor and the critical oscillation period;
(3) in a certain degree of control The parameters of the PID controller are calculated by the formula.
11 air supply category editor
Horizontal wind
Horizontal wind is the left side of the wind, the right side of the suction, suitable for powdered items baking!
Vertical wind
Vertical wind is the two sides of the wind, the middle suction, suitable for large industrial goods baking!
12 Circulation System Edit
The hot air circulation system mainly includes cyclone separator, blower, air filter and heater. From the dryer out of the hot air by the cyclone separator to remove the powder back to the blower, and then filtered, can be heated and sent to the dryer, in the process of circulation, the root of the temperature of the air in law, and constantly discharging part of the circulating air, supplemented by part of the fresh air after the humidity reduction and filtration, the dryer is characterized by slices of the ten dryer is a piston comb basically to ensure that the slices of the drying process in the small residence time is the same, the drying quality is better, and the drying quality is better. Better, and after drying the slices can be cited continuously into the screw extruder hopper for spinning use, to avoid dry slices back to moisture, and the dryer itself is relatively simple structure.
Commercial Kitchen Equipment Concept Editor
Commercial kitchen equipment, refers to the commercial use of the kitchen or for cooking equipment, tools, collectively. Commercial kitchen equipment usually includes cooking and heating equipment, such as stoves: gas stoves, steam cabinets, induction cooktops, microwave ovens or electric ovens. Handling processing class: and pasta machine, steamed bread machine, pasta machine, slicer, meat grinder, squeeze juice machine, etc.. Sterilization and cleaning processing equipment: cleaning table, stainless steel basin, dishwasher, dish sink or dishwasher, disinfection dishwasher. For food materials, utensils and semi-finished products at room temperature and low-temperature storage equipment: flat shelves, rice and noodle cabinets, refrigerators, freezers, cold storage and so on. Usually used in the kitchen supporting equipment include: ventilation equipment such as exhaust hoods, ducts, air cabinets, smoke treatment of waste gas and waste water fume purifiers, grease traps and so on. Large-scale catering industry also includes food elevator. Due to the special health requirements of commercial kitchenware, with social progress, in the past 20 years, the kitchen equipment in contact with food and raw materials part of the stainless steel has been universal, to meet the hygiene and health requirements. Kitchenware concept