What are classifications of industrial ovens? How should users choose the right one?
An oven is a generic term that can be selected based on various specifications depending on the different production processes and functions. 
Here are the specifications users can choose from:

1. Temperature:
  • Low-Temperature Oven: Below 200°C.
  • High-Temperature Oven: 200°C to 500°C.
  • Specialized Oven: Above 500°C.

2. Pressure:
  • Pressurized Oven: Used within a sealed chamber with inert gas for baking.
  • Atmospheric Oven: Used within a sealed chamber with hot air circulation for baking.
  • Negative Pressure (Vacuum) Oven: Used within a sealed chamber with a vacuum pump to remove gases for baking.

3. Usage and Control Methods :
  • Batch Oven (Batch): This includes traditional precision ovens, cart-type ovens, dust-free ovens, oxygen-free ovens, and environmental aging test furnaces,among others.
  • Programmable Semi-Automated Oven :
    This category includes tunnel-type conveyor ovens, ovens with automatic door opening/closing mechanisms (compatible with AGV / RGV / MGV), and multi-process recipe-controlled ovens, among others.
  • Fully Automated Oven: These ovens can be integrated with AGV (Automated Guided Vehicle), EFEM (Equipment Front End Module), Robot, Loader, orUnloader systems. Depending on the production materials and capacity requirements, they can upload process data to the control system, achieving the goal of a fullyautomated, unmanned factory.

4. Size:
The size of an oven is defined by the internal chamber space, and it distinguishes oven sizes. Small ovens are designed for small-scale production and verification needs. The specifications and size are  not strictly defined, but "WEISUN" standard models have a minimum size of W300xD300xH300 (mm).

 
How is an industrial oven composed, and how should accessories and functions be selected?
Different drying ovens designed for various functions or purposes have distinct constructions, so it is essential to pay special attention to avoid purchasing an unsuitable product. 
Here are the components and features to consider when selecting an industrial oven:

1. Structural Hardware:
  • Oven Structure: Depending on the usage environment, the outer casing of the oven can be made using methods such as powder coating or stainless steel  (SUS material).
  • Circulation Structure: The way air circulates within the oven can be categorized as "horizontal" or "vertical," depending on the airflow path.
  • Optional Structures: Depending on the production requirements, various design modules are available, including dust-free filtration modules, oxygen-free gas pipelines, vacuum pump pipelines, and more.

2. Heating System:
  • Insulation Structure: The thickness and material of the insulation layer are designed based on the operating temperature.
  • Electric Heating Specifications: Depending on the characteristics of the customer's products, heating elements can include bare wire heaters, stainless steel heating tubes, infrared lamps (with   selectable wavelength), overheated steam, hot oil, and more.

3. Cooling System:
Cooling systems are designed based on the cooling efficiency required for the production material and may include modules like manually adjustable air dampers, automatic air dampers, forced intake and exhaust, water-cooled heat exchange systems, and more.
 
4. Control System and Safety Protections:
  • Control Solutions: Control options may include traditional control circuits, programmable software control, human-machine interfaces (HMI), multi-stage temperature control, oxygen concentration detection, CIM (Computer Integrated Manufacturing), Ethernet, SECS/GEM communication protocols, and more.
    protectors, motor over-current protection, abnormal alarms, reverse prevention devices, safety door switches,etc.
  • Safety Features: Safety measures include power overload protectors, control circuit safety devices, over-temperature protectors, electric heater over-current 
How is the internal size typically chosen for an industrial drying oven to achieve the best even heating effect?
The interior dimensions of an industrial drying oven should take into consideration the following factors to ensure both high-quality production and be user-friendly:

1. Considering if the chamber provides sufficient space for easy loading and unloading of products.
2. Considering if there is a buffering area within the chamber to facilitate proper air circulation without being obstructed by the products, ensuring smooth airflow.

In response to these considerations, "WEISUN," with years of experience in manufacturing drying equipment, designs industrial ovens with a buffering zone of 7-10 centimeters in order to achieve optimal even temperature distribution and usability.
internal product size chosen for industrial drying oven
Does drying equipment/industrial oven have explosion-proof features?
Yes, drying equipment and industrial ovens typically consider explosion-proof features, especially when handling flammable gases or vapors. Explosion-proof features generally include the following aspects:

1. Explosion-proof Structural Design : The equipment/oven's structural design should consider explosion-proof requirements, such as using explosion-proof materials or designs to reduce the risk of explosion.
2. Explosion-proof Electrical Design : The equipment/oven's electrical design should comply with explosion-proof standards, such as using explosion-proof electrical components and control systems to ensure safe operation in environments with flammable gases or vapors.
3. Static Electricity Discharge : For areas prone to accumulating static electricity, the use of anti-static materials or designs should be considered to reduce the risk of static electricity discharge causing explosions.
4. Ventilation System : The equipment/oven should be equipped with a good ventilation system, including explosion-proof ventilation design, to ensure safe discharge in case of gas or vapor leaks.
5. Explosion-proof Door Design : The equipment/oven should have an explosion-proof door design that can quickly release pressure in case of an explosion, reducing the impact of the explosion on the equipment/oven and the surrounding environment.

Overall, explosion-proof features are crucial for drying equipment and industrial ovens handling flammable gases or vapors, ensuring safe operation in potentially hazardous situations.
What types of heaters are used in drying equipment/industrial oven?
Drying equipment and industrial ovens come in a variety of heating types, offering different options based on various applications and requirements. Here are some common types of heaters:

1. Resistance Heaters : Resistance heaters are one of the most common types, typically made of wires or resistance coils that generate heat when current passes through them. They can be installed at different locations inside the equipment/oven and provide fast and controllable heating.
2. Hot Air Circulation System : This system typically consists of a blower wheel and heating elements that circulate hot air evenly throughout the equipment/oven, improving heating efficiency and ensuring uniform heating of products.
3. Radiant Heaters : Radiant heaters are usually made up of heating tubes or wires that directly heat the surface of products or objects through radiation. They can provide localized heating and are useful in some specific applications.
4. Steam Heaters : Steam heaters use steam as the heating medium to heat products. They can provide stable and efficient heating and can be integrated with other equipment/oven.
5. Gas Heaters : Gas heaters use natural gas or liquefied petroleum gas (LPG) as the heat source, heating the interior of the equipment/oven through combustion. Gas heaters typically have high efficiency and offer rapid heating.

Each type of heater has its own characteristics, and the choice of the appropriate type depends on specific application requirements and equipment/oven design.
What is the cooling efficiency of the drying equipment/industrial oven? What are the available cooling methods, and how should one choose between them?
The method and choice of cooling depend on the design and application requirements of the drying equipment/industrial oven. Here are some common cooling methods:

1. Natural Cooling: After heating is stopped, the equipment naturally cools to room temperature. This is the simplest and most common cooling method, but it may take a longer time.
2. Forced Cooling: By increasing ventilation or using cooling fans, the circulation of internal air is accelerated, thereby speeding up the cooling process.
3. Water Cooling: Installing a water cooling system internally or externally to reduce temperature through water circulation.
4. Air Cooling: Installing an air cooling system internally or externally to reduce temperature through the flow of gas (such as nitrogen or air).
5. Rapid Cooling: By transferring the product to a cooling chamber or using rapid cooling equipment, rapid cooling can be achieved.

When choosing a cooling method, the following factors need to be considered:

1. Product Requirements: Choose a suitable cooling method according to the characteristics and requirements of the product to ensure that the product quality is not affected.
2. Energy Consumption: Consider the energy consumption of the cooling method and select one that complies with corporate energy-saving requirements.  
3. Production Efficiency: Based on production schedules and product process requirements, select the appropriate cooling method to ensure progress.

By considering the above factors comprehensively, you can choose the most suitable cooling method to ensure product quality and production efficiency.
What is the normal pressure value for an anaerobic/oxygen-free chamber?
The chamber pressure of an oxygen-free/anaerobic drying equipment or industrial oven is typically determined based on specific applications and design requirements, which can vary between different equipment/oven. Generally, the chamber pressure is controlled to be in a positive pressure state to ensure that air cannot enter the chamber, thereby achieving oxygen-free drying.

The specific normal value of chamber pressure is influenced by equipment/oven design and operational requirements, and usually needs to be adjusted and determined according to actual conditions. It is recommended to refer to the equipment/oven's operation manual or contact us to obtain the exact chamber pressure information.
What are safety features of industrial ovens, and how should users choose them?
Industrial ovens has a heating system. During a temperature rising process, it has a larger load capacity. Therefore, it is essential to ensure safety protection for both furnace temperature control and control circuits. However, please consider your specific usage requirements. Here are some safety features and considerations:

1. Over-Temperature Protection: 
This protection is triggered when there is an abnormal temperature condition. Temperature control elements have a limited lifespan, and if a temperature control abnormality occurs, the temperature detection signal will immediately provide feedback. The oven circuit will activate an abnormal alarm (audible alert), and the heater will be disconnected.

Note: "WEISUN" industrial drying ovens have multiple sets of over-temperature detection signals to reliably prevent high-temperature fires in case one set of protection fails.

2. Reverse Prevention Device: 
When a drying oven is in operation and the power system is three-phase (R, S, T), it is crucial to confirm the "direction of rotation" for proper airflow circulation. Incorrect rotation direction can disrupt the heat source circulation, often caused by differences in the power supply system. To prevent this, install a reverse prevention device during equipment setup. The control system can immediately detect whether the direction is correct, and if there is an error, simply change the "power phase sequence."

3. Air Pressure Detection: 
During the operation of the oven, external factors or sudden environmental changes may lead to poor airflow circulation. To address this, you can install an "air pressure detection device" in the airflow circulation system. When a signal is triggered, it activates an alarm (audible alert) and ensures equipment safety.

4. Safety Door Switch:
When the oven operates at high temperatures, it may be necessary to prevent unauthorized opening of the furnace door to prevent harm from sudden temperature changes and product damage due to improper operation. You can install an electronic lock and sensing device on the oven door, providing a control mechanism for management, enhancing equipment safety and reliability.

5. Over-Current (Load) Protection:
Over time, various factors such as component lifespan and power supply issues may lead to abnormal conditions in the oven. During the design phase, safety measures for "over-current" and "over-load" are considered. Protection features may include circuit breakers, control circuit fuses, electric heater over-current protectors, motor over-current protection, and more. Whenever an abnormal load occurs, the circuit will disconnect to ensure equipment safety.
  
What are classifications of temperature control in industrial ovens? How do you choose an appropriate one?
Temperature control and achieving uniformity in ovens are ongoing technological challenges for manufacturers and often result in significant cost differences. Here are the different temperature control methods based on the temperature control mode:

1. Traditional ON/OFF Relay-Based Temperature Control:
  • Principle: The heating circuit is controlled using electromagnetic relays, which detect whether the temperature has reached the setpoint and determine when to turn the electromagnetic relay on or off.
  • Operation: If the set temperature has not been reached, the electromagnetic relay remains in the ON state until the "set temperature" is equal to or greater than the "detected feedback temperature." When the temperature reaches the setpoint, a signal is sent to turn off the relay, and heating stops.
  • Application: This temperature control method is less accurate but relatively cost-effective. Due to the precision requirements of temperature control, it is rarely used in industrial ovens today.

2. PID + SSR Temperature Control:
  • Principle: The temperature controller outputs a voltage signal (DC 0V~12V) and uses a Solid-State Relay (SSR) as a pulse control device. The temperature controller's PID algorithm output, combined with the SSR, allows for stable temperature control.
  • Operation: When the set temperature has not been reached, the heating signal from the temperature controller continues to output the PID algorithm until the "set temperature" is equal to or greater than the "detected feedback temperature." When this happens, the temperature control signal stops outputting, and the electric heater stops heating.
  • Application: This temperature control method is accurate and cost-effective, making it the prevailing temperature control method in industrial ovens today.

3. PID + SCR Temperature Control:
  • Principle: The temperature controller outputs a current signal (DC 4~20mA) and uses a Silicon-Controlled Rectifier (SCR) as a phase control device. The temperature controller applies PID control to achieve precise output control of the heater. It effectively controls temperature accuracy requirements by modulating the phase output.
  • Application: SCR temperature control offers higher accuracy than SSR-based control but comes at a slightly higher cost. It is currently the best choice for precise temperature control.
Industrial ovens experience a wide range of temperature variations. What insulation materials can be used? How should they be chosen?
In response to product requirements, industrial ovens can provide a wide range of temperature usage. To prevent accidental burns, effective insulation is a crucial consideration.
The choice of insulation materials should be based on the temperature range at which the oven will be used. Selecting appropriate materials not only improves energy efficiency (better insulation) but also enhances safety. Of course, cost and functionality should also be reasonably balanced.

Based on temperature, insulation materials for oven applications can be categorized as follows :
↔️ Swipe right or left for more information
Types of Insulation Characteristics Cost Application Scenarios Remark
PU foam 1. Corrosion resistance.
2. High density with excellent insulation, soundproofing,
   and fire resistance.
3. Long service life.		 Low 1. Cooling equipment for refrigerated and frozen storage rooms.
2. Suitable for industrial constant temperature and humidity
    chambers below 100°C.		  
Fiberglass insulation 1. Soft texture with strong resilience.
2. Easy to cut, convenient for construction.
3. Possesses insulation, soundproofing,
    and fire-resistant properties.		 Medium 1. Temperature-resistant up to approximately 300°C.
2. Often used for insulation in ovens with temperatures
    below 200°C.		 Due to the construction process, fiberglass is prone to adhere to the skin, causing itching.
"WEISUN" does not use it and opts for rockwool instead.
Rockwool 1. High density, minimal deformation.
2. Soft and highly elastic fibers.
3. Easy to cut, convenient for construction.
4. Possesses insulation, soundproofing,
    and fire-resistant properties.		 Medium 1. Temperature-resistant up to approximately 590°C.
2. Frequently used for insulation in ovens
    with temperatures below 500°C.		  
Ceramic fiber 1. High corrosion resistance.
2. Excellent high-temperature stability.
3. Strong resistance to thermal shock.
4. Exhibits compression rebound and suitable
    for high-temperature sealing materials.
5. High-temperature resistance and lightweight insulation material.		 High 1. Temperature-resistant up to approximately 1,260°C.
2. Frequently used for insulation in ovens
    with temperatures above 500°C.		  
What are the precautions to be taken when using an industrial oven for the first time?
Here are the precautions to be taken when using an industrial oven for the first time:

1. When initially connecting the power supply or re-connecting the machine after moving it, follow the electrical specifications indicated on the oven's nameplate. Ensure proper grounding to prevent electrical leakage accidents.
2. Industrial ovens are designed for specific industrial baking purposes as specified during customization. Do not use them for any other unspecified purposes.
3. Industrial ovens are general-purpose high-temperature heating equipment. Do not use them to bake flammable or explosive materials.
4. Do not place any items above the industrial oven, and do not obstruct the oven's ventilation openings.
5. Keep items away from exhaust vents, valves, safety pressure relief valves, etc., to prevent blocking the ventilation space, which could pose a danger.
6. Environmental requirements:
  • Install the oven in a flat environment to ensure stable operation.
  • Ensure good ventilation and minimal dust accumulation. It is recommended to keep a distance of at least 10cm from the wall for heat dissipation.
  • Do not place the oven in a damp area, as high humidity in the surroundings during oven operation can lead to temperature differences.
  • Do not expose it to flammable or corrosive gases (excluding special ovens).
  • Keep it away from combustible materials.
  • Maintain an environmental temperature within the range of room temperature to 30°C.
7. When turning on the power switch, confirm that the direction of the fan motor matches the direction indicated by the arrow on it to ensure proper circulation. If the rotation direction is incorrect, change the power phase sequence promptly.
8. Non-technical personnel should not alter the temperature controller or timer parameters.
9. If the industrial oven is equipped with a baking timer, first set the desired baking time and then turn on the timer switch. Do not adjust the time after turning on the timer switch, as this can lead to timing errors.
10. During high-temperature operation or when the internal temperature of the oven has not cooled down to a safe range, do not open the oven door to retrieve baked goods. This can prevent injury from hot gas or direct contact with hot items. If you need to work in high-temperature conditions, wear protective gear to prevent burns.
 
Does the quantity of products affect temperature uniformity during baking?
The quantity of products being baked can indeed affect the temperature distribution inside a drying equipment/industrial oven. When the quantity of products increases, the internal space may become more crowded, affecting the flow and uniformity of hot air, thereby influencing temperature distribution.

Specifically, an increase in the quantity of products being baked may lead to the following situations:

1. Local Temperature Variations: Local temperature variations may occur inside the equipment/oven, with some areas being hotter than others, resulting in over-baked or unevenly baked products.
2. Increased Equipment/Oven Recovery Time: When the quantity of products being baked increases, the oven may take longer to recover to the set temperature, which can affect baking efficiency and time.

To ensure uniform temperature inside the equipment/oven, consider the following measures:

1. Proper Arrangement of Baking Trays: Properly arrange baking trays inside the equipmen/oven to maintain uniformity of internal space.
2. Regular Inspection and Adjustment of the Equipment/Oven : Regularly inspect the equipment/oven's temperature control system and ventilation system to ensure they are functioning properly, and adjust as needed.
3. Control of Oven Load : Control the load of products inside the equipment/oven to avoid overcrowding, which can affect the flow and uniformity of hot air.
Does the oven need regular maintenance and cleaning? What are the basic maintenance items?
When the oven is baking, it is inevitable that there will be volatile solvent residues in the oven. If you want to increase the service life, regular maintenance and cleaning must be done, and it can prevent accidents.
↔️ Swipe right or left for more information
  Check Item Check Method Check Interval Identification Method
1 Exterior * Visual inspection
* sound check		 Daily *The appearance is abnormally dirty, immediately maintain and clean
*Is there any sound other than normal operation?
2 Power line * Visual inspection Weekly * Whether the line sheath is damaged
* Whether the joints of each part are loose.
3 Pneumatic line ※Visual inspection
※sound check		 Weekly ※Check the pressure gauge to see if the pressure is sufficient.
※Confirm whether there is a sound of gas leakage.
4 Bolts and nuts of various parts ※Check if the screws are loose Monthly ※The screws of each part should not be loosened, if found to be loose, they should be fastened immediately.
5 Emergency stop switch ※pressure test Monthly ※Pressure test the emergency stop switch to test whether the machine can stop immediately.
6 Over temperature protector ※Over temperature test
※Manual test		 Quarterly ※Make sure that the over-temperature protector has a set temperature lower than the actual operating temperature.
※ Check whether the protector works correctly, and check the content of the error message.
7 No fuse switch * Overload test Quarterly *Press the test button to confirm whether the overload has tripped.
8 Signal switch (Sensor) * Manual test Quarterly * Test whether the signal feedback is correct.
9 Intake and exhaust pipes * Visual inspection
* wipe clean		 Quarterly * Dust or solvent residue removal.
* Replace damaged tubing.
10 Filter (HEPA) * Check pressure gauge changes
* Internal particle detection
* Visual inspection		 Quarterly *If the pressure value exceeds or is higher, it needs to be replaced HEPA
* If it is detected that the Particle exceeds the limit, it is necessary to clean the furnace body or replace the HEPA.
*Use a visual inspection for damage.
11 Windmill motor * Visual inspection
* Sound check		 Quarterly *Is there any abnormal sound
* Whether the motor vibrates too much.
12 Furnace door tight * Visual inspection Quarterly Whether there is any exposure when the air supply of the machine is running.
Whether there is any damage or other loss.

Safety instructions

  • During maintenance, the main power supply must be cut off to avoid unnecessary damage to machine parts and the danger of electric shock to personnel.
  • Do not operate at high temperature, or perform cleaning inspection if the temperature in the furnace is not lowered to a safe range, to prevent burns and industrial safety.
What are the cooling rates for water-cooled and air-cooled systems?
The cooling rate of water and air depends on many factors, including the temperature, flow rate, heat capacity of the cooling medium, and the heat capacity and thermal conductivity of the object being cooled. Generally, water cooling typically has a higher heat capacity and thermal conductivity than air cooling, so the cooling rate of water cooling is usually faster than that of air cooling.
The specific rate depends on the equipment/oven and conditions; for example, the flow rate and temperature of the water in a water cooling system will affect the cooling rate, and the flow rate and temperature of the gas in an air cooling system will also affect the cooling rate. 
However, to determine the specific cooling rate, the specific design and operating conditions of the equipment/oven need to be considered. It is recommended to conduct tests and evaluations in actual applications to determine the best cooling method.
As a professional manufacturer of drying equipment/industrial ovens, we have accumulated decades of design and manufacturing experience and have obtained highly valuable data, as shown in the diagram, for reference. 
↔️ Swipe right or left for more information
Cooling
Methodology
Cooling 
Methods
Cooling Rate
(Empty Chamber)
200℃~70℃
Cooling Rate
(Empty Chamber)
200℃~110℃
Max. Achievable
Cooling Temperature
Application
Drawing external air 
directly into the chamber
Ventilation dampers
(Natural Air)
2.5℃/min
 
70℃
All equipment that do not require 
O2 concentration during cooling
Ventilation dampers
 + 
Blowers(Forced Air)
3.5℃/min
 
60℃
Automatic ventilation dampers
+
ONE-PASS 
(Interrupting the internal hot-air ciruclation)           
4.5℃/min
 
55℃
Automatic ventilation dampers
+
Chiller
+
Blower(Forced Air)
5.8℃/min
 
50℃
Drawing external air 
into the equipment
( not into the chamber )
Interlayer Cooling
+
Blower
∞
0.4℃/min
110℃
All equipment that do require 
O2 concentration during cooling
Internal Chiller
Interlayer Cooling
+
Blower
+
Water Chiller
∞
1℃/min
90℃
How can a dust-free/clean chamber be achieved, and is there a method for real-time monitoring?
1. Proper Design: Drying equipment/industrial ovens should have a well-sealed structural design to prevent external dust from entering the interior.
2. Regular Cleaning: Regularly clean the interior and exterior, including filters, vents, and other areas, to maintain cleanliness inside.
3. Appropriate filtration system: Install appropriate filters (HEPA) that can effectively filter dust and impurities in the air, improving the cleanliness of the oven.
4. Control Indoor Airflow: Control the indoor airflow to avoid dust generation inside.
5. Set Pressure Differential Control: By setting up a pressure differential control system, control the pressure difference between the interior and exterior to prevent external dust from entering the oven.
6. Regular Inspection and Maintenance: Regularly inspect each component to timely discover and repair any leaks or damages that may allow dust to enter.

For real-time monitoring of cleanliness, consider using air quality monitors or particle counters to measure particle concentrations in the air inside and around the drying equipment/industrial oven to ensure it meets the cleanliness requirements. These devices can provide real-time monitoring data to help adjust the operation and maintenance of the drying equipment/industrial oven in a timely manner to ensure cleanliness. Cleanliness can only be monitored in real-time in the absence of solvents or other volatile contaminants.
What maintenance procedures should be followed for a solvent recovery system, and how can its effectiveness be monitored?
Maintaining and servicing a solvent recovery system is crucial for ensuring its smooth operation and efficiency. Here are some common maintenance measures:

1. Regular Cleaning: Clean various components of the solvent recovery system regularly, including condensers, filters, pipelines, etc., to maintain good ventilation.
2. Regular Replacement of filters and seals: Regularly replace filters and seals according to usage and manufacturer recommendations to ensure system sealing and filtration efficiency.
3. Check and Maintain The Cooling System: Regularly check and clean the cooling system to ensure good cooling effects and prevent solvent vapor leaks and damage.
4. Regular Inspection of The Electrical System: Regularly inspect the electrical system, including the control system and electrical connections, to ensure they are functioning properly.
5. Regular Calibration and Inspection of Instruments: Regularly calibrate and inspect thermometers, pressure gauges, and other instruments to ensure their accuracy and normal operation.
6. Regular Inspection of Pumps and Valves: Regularly inspect pumps and valves to ensure they are operating properly and prevent solvent leaks and damage.

Monitoring a solvent recovery system can be done in the following ways:

1. Monitoring Temperature and Pressure: Regularly monitor the temperature and pressure of the condenser to ensure it is working properly.
2. Monitoring Flow Rate: Regularly monitor the flow rate of the solvent recovery system to ensure it is within normal range.
3. Monitoring The Electrical System: Regularly monitor the operation of the electrical system to ensure it is working properly.

By implementing these measures, you can ensure the normal operation and high efficiency of the solvent recovery system, and promptly detect and address issues to prevent system failures.
What is the purpose of triple over-temperature protection, and how can it prevent oven burning and idle running?
The three main overheat protections typically include:

1. Temperature Controller: Drying equipment/industrial ovens are equipped with a temperature controller to monitor the internal temperature. When the temperature exceeds the set value, the controller automatically shuts off the heating elements to prevent overheating.
2. Fuse or Temperature Protector: Fuses or temperature protectors are usually installed near the heating elements. When the temperature exceeds the safe range, these protectors automatically cut off the power to prevent the heating elements from overheating.
3. Rotation Protection: Rotation protectors are typically installed on the oven's turntable or blower wheel to detect whether they are operating normally. If the turntable or blower wheel stops rotating, the rotation protector automatically shuts off the heating elements to prevent the oven from burning out.

To prevent burning out and rotation failure of the drying equipment/industrial oven, you can consider the following points:

1. Regular inspection and maintenance, including cleaning the heating elements, turntable, and blower wheel to ensure they operate properly.
2. Do not exceed its design capacity when in use to avoid overloading.
3. Follow the user manual and operating requirements to avoid incorrect usage leading to burning out or rotation failure.
4. Regularly check the temperature controller and fuses to ensure they are functioning properly.

Overall, proper maintenance and correct usage are key to preventing burning out and rotation failure.
Can the temperature inside the drying equipment/industrial oven be monitored and adjusted at any time?
The chamber temperature can typically be monitored and adjusted at any time, depending on the design and control system of the drying equipment/industrial oven. Modern equipment/oven is often equipped with a temperature control system that can monitor the chamber temperature in real-time and make adjustments to ensure the temperature stays within the set range.
These temperature control systems typically use temperature sensors (such as thermocouples or infrared sensors) to monitor the chamber temperature and adjust it by controlling the heating elements or ventilation system.

With a temperature control system, operators can monitor the chamber temperature at any time and make adjustments as needed. This functionality ensures that the heating or cooling process in the drying equipment/industrial oven is carried out according to the set requirements, ensuring product quality and production efficiency.
How does the oven air circuit circulate? What is the direction of the wind? How to choose a suitable oven?

The principle of the box is to pass the cold air through the heater, and then circulate the heat energy through the wind, so that the temperature can be transferred to the product to meet the needs of the drying process, as shown in the figure below.

wind circulation process

Choosing a suitable oven will deeply affect the quality and production capacity of production. The following items must be considered:

  • Assessing the "horizontal" or "vertical" air supply direction of the oven has a lot to do with the way the production materials are placed, because it will affect whether the air flow is smooth or not.
  • When the size of the product is too large, or a single furnace body needs to produce a large number of objects, and a large oven is required for production; the air flow from both sides can effectively control the temperature and improve the production quality.
    The following illustration briefly explains the selection of oven airflow and product matching. "WEISUN" has a design team with many years of experience, which can tailor-made planning for customers and meet the requirements of high-quality production of oven equipment.
The following illustration briefly explains the selection of oven airflow and product matching.
How can dirt buildup on the blower wheel be prevented?
The key to preventing the accumulation of powder debris in the blower wheel is regular cleaning and maintenance of the blower wheel and its surrounding environment. Here are some preventive measures:

1. Regular Cleaning : Regularly inspect and clean the surface and blades of the blower wheel to prevent dust and debris buildup.
2. Install Proper Filters : Installing proper filters at the intake or exhaust of the blower wheel can filter out dust and debris in the air, reducing the likelihood of buildup.
3. Maintain Clean Surroundings : Keep the area around the blower wheel clean to avoid dust and debris buildup, reducing the likelihood of accumulation.
4. Adjust Blower Wheel Speed Properly : Properly adjusting the blower wheel's operating speed to avoid excessively fast or slow speeds can reduce its attraction to dust and debris.
5. Regular Maintenance : Regular maintenance of the blower wheel and related equipment to promptly identify and address potential issues can effectively prevent the problem of powder debris accumulation.
What is the recommended replacement interval for HEPA filters?
The recommended replacement time for HEPA filters depends on the usage environment and conditions. Generally, it is recommended to replace the HEPA filter every 6 months to 1 year to ensure its filtration effectiveness and performance. If the environment has more dust or pollutants, or if the HEPA filter gets clogged with dust during use, it is advisable to replace the HEPA filter more frequently to ensure clean air and filtration effectiveness. It is recommended to check the manufacturer's guidelines and recommendations before replacing the HEPA filter to determine the optimal replacement time.
How can the solvent buildup inside the drying equipment/industrial oven be effectively removed?
To effectively remove solvent buildup inside the equipment/oven, consider the following methods:

1. Regular Cleaning : Clean the interior surfaces regularly, especially areas prone to solvent buildup such as heaters, pipes, and containers. Use appropriate cleaning agents and tools to ensure the solvent buildup does not affect oven operation.
2. Mechanical Removal : For thicker solvent buildup, consider using mechanical methods such as scraping or brushing to remove solid residues.
3. Chemical Cleaning : Use appropriate chemical solvents or cleaning agents to clean solvent buildup for more thorough removal of residues.
4. Maintain Ventilation : Maintain good ventilation inside the equipment/oven to help evaporate solvents and prevent excessive buildup.
5. Regular Inspection : Regularly inspect the equipment/oven's interior to promptly detect solvent buildup and take appropriate cleaning and remedial actions.

Applying these methods can effectively remove solvent buildup inside the equipment/oven, ensuring safe and efficient oven operation.
What impact does oven with rust have on production? How can rust be prevented? Which type of oven should be selected for the production process?
Industrial ovens made of metal may rust if wrong materials are chosen due to volatile substances or temperature variations during production. 
Tips for selecting right materials and preventing rust :

1. Rust can lead to dust accumulation inside drying equipment. If a dust-free environment is essential, rust issues must be addressed.
2. Industrial drying equipment are typically made of stainless steel like SUS430, SUS304, or SUS316. The higher the chromium and nickel content, the less prone they are to rust, albeit at a higher cost.
3. In the product baking process or the production environment, whether there are volatile gases or solvents (acids, alkaline substances), it is important to proactively inform the manufacturer. The manufacturer will then choose the appropriate material based on metal characteristics, ensuring a reasonable balance between cost and functionality.
4. Due to differences in product baking temperatures and considering purchase costs, the choice of oven material is also a selection factor.

For low-temperature industrial ovens (below 200°C), suggest to select stainless steel with 'lower' chromium and nickel content. High-temperature industrial ovens (200°C~500°C) require stainless steel with 'higher' chromium and nickel content. Products emitting acidic or alkaline substances recommend to use SUS316 or higher-grade stainless steel.

 
What are the rust prevention methods for the exterior or interior of the machine?
For the prevention of rust on drying equipment/industrial ovens, both the exterior and interior can be treated in several ways:

1. Material Selection: Choose materials with good corrosion resistance, such as stainless steel or high-temperature coatings, to improve the equipment/oven's corrosion resistance.
2. Surface Treatment: For metal surfaces, special surface treatments like galvanizing, phosphating, or chroming can be applied to improve corrosion resistance.
3. Coating Protection: Special rust-proof coatings, such as high-temperature rust-proof paint, can be applied to metal surfaces to enhance their corrosion resistance.
4. Ventilation and Dehumidification: Maintain good ventilation inside the equipment/oven and avoid humid environments to reduce corrosion of metal components.
5. Regular Cleaning and Maintenance: Regularly clean and maintain the equipment/oven, promptly removing accumulated dust, dirt, and moisture to reduce corrosion on metal surfaces.

By applying these rust prevention methods, the service life of drying equipment/industrial ovens can be effectively extended, ensuring the quality of their appearance and internal components.
How can we prevent or improve paint peeling around the exterior of the oven door caused by volatilized gas from baking resin products?
1. Use High-temperature-resistant Coatings: Ensure that the coatings used on the exterior of drying equipment/industrial ovens can withstand high temperatures and chemical corrosion. high-temperature-resistant coatings can typically maintain stability at high temperatures and have better resistance to volatile compounds.
2. Increase Ventilation: Increasing the ventilation of drying equipment/industrial ovens can help volatile gases be expelled more quickly, reducing the impact on the paint.
3.Regular Cleaning and Maintenance: Regularly cleaning drying equipment/industrial ovens, especially the door edges and other vulnerable areas, can reduce the accumulation of chemicals on the surface, slowing down the rate of paint peeling.
4. Install stainless steel covers on the door opening to prevent chemical substances or high temperatures from causing paint peeling.
5.Change The Way of Use: If possible, try adjusting the way the equipment is used, such as changing the temperature, time, or using other baking methods, to reduce the impact of volatile gases on the paint.
What are the common malfunctions encountered in industrial ovens? How can they be easily inspected and resolved?
1. Power Supply Issues
  • When experiencing power problems, first check the specifications of the power supply using a multimeter.
  • Inspect the fuses in the machine.
  • Check if the main power switch is malfunctioning.

2. Abnormal Heating and Temperature Increase
  • If temperature operation issues arise, first check if there are any errors in the temperature controller settings.
  • In case of abnormal over-temperature, verify if the over-temperature protector (O.T.P) settings are correct or if there are errors in the temperature controllersettings.
  • Inspect if the electromagnetic contactor (MC) has poor contact.
  • Check if the electric heater is faulty (measure resistance with a multimeter to confirm correctness).
  • Examine if the Solid-State Relay (SSR) is faulty.
  • Inspect whether the fuses are blown.
  • Assess if the ventilation in the installation area is inadequate.

3. Fan Malfunction and Maintenance
  • Check if the electromagnetic switch (MS) has tripped.
  • Inspect if the motor (M) is malfunctioning.
  • Verify if the fan blades are loose or detached.


 
Do you repair or service drying equipment/industrial oven made by other manufacturers?
We have experienced technicians and relevant equipment that can quickly and effectively repair various brands of drying equipment/industrial ovens, ensuring their normal operation. In addition, we also provide equipment/oven upgrade services, which can upgrade old equipment/oven according to customer needs and requirements, including updating control systems, enhancing safety performance, and improving energy efficiency. These upgrades can extend the life of old equipment/oven, improve its performance and efficiency, and make it more suitable for modern production requirements. Therefore, if you have old drying equipment/industrial ovens that need repair or upgrade, please feel free to contact us at any time.
Do you offer direct sales without intermediaries or agents?
In general, the direct sales model without the involvement of agents or distributors is only suitable for specific regions or situations, such as:

1. Specific Regions : To better control the sales and service of products in a particular area.
2. Specific Situations : In certain cases, it may be chosen to deal directly with customers, such as for large orders or specific customer needs.

Overall, whether to adopt a direct or indirect sales approach depends on local strategies and business models. If you have specific needs or circumstances, it's recommended to contact us directly.