仪器博士

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The selection of hot air oven is those.

Each dryer device has its specific application range, and each material can find several drying devices that meet the basic requirements, but only one of them is suitable. Such as improper selection, user besides take unnecessary one-time high purchasing cost, but also in the whole period of using pay a heavy price, such as low efficiency, high energy consumption, high operation cost, product quality is poor, and even could not run normally and so on.

The following are the basic guidelines for drying machine selection. It is hard to say which or which items are most important.

The ideal selection of hot air oven must be based on its own conditions, sometimes the compromise is necessary.

[for] first drying device must be able to apply to specific materials, basic application request contains material and meet the material drying can be a very good disposition of the material, and can satisfy the processing, to take off the water, the basic requirement of product quality, etc.

[High drying rate] in the drying rate, highly fragmented with convective drying material in hot air, the critical moisture content is low, fast drying speed, and with is convection drying, drying methods different critical moisture content is also different, thus the drying rate are also different.

The thermal efficiency of general conduction type drying can reach 100% in theory, and only about 70% for flow drying.

[save investment] to complete the same function of drying equipment, sometimes its cost difference, should choose its low choice.

[low operating cost] equipment depreciation, energy consumption, labor cost, maintenance, spare parts cost... The operation cost of electric heating drum drying oven, electric thermostatic drying oven and vacuum drying oven should be as low as possible.

The first choice structure is simple, spare parts supply sufficient, reliable high, long life drying device.

Comply with environmental requirements, good working conditions and high safety.

Before selecting type, it is better to make the dry experiment of materials, and to know more about the drying devices that have been used in similar materials. It is often helpful to select the appropriate type.

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The temperature of the vacuum drying oven cannot be controlled.

A lot of people have used a vacuum drying oven, and the problem with temperature control is a headache, and that's the temperature of the vacuum oven can't be controlled. What should we do with this problem?

Firstly, the structure of vacuum oven is analyzed, and the fault is well analyzed, and the root cause of the problem is found according to the specific problems and reasons.

1, temperature difference and 40 degrees, you first check the blower motor to have fallen, secondly to check whether there is fault test probe, in addition, if small vacuum drying oven just reach the set value, then measure the temperature can make a big difference, to wait for more than half an hour again constant temperature measuring temperature uniformity.

2. If the temperature is longer, the temperature controller can be adjusted by PID adjustment, so as to reduce the P value and increase the D value.

3. If the temperature is not constant, check whether the temperature probe is loose and strengthened.

Before the customer mentioned that such a problem, set the temperature to 105 degrees, after an hour, found the temperature display has remained steady at 105.1 degrees, turn on the vacuum drying oven door and put the sample that I need to constant weight, about half an hour later, she heard oven buzzer alarm, showed that the temperature of 115 degrees. This temperature is a sensor problem.

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Can hot air oven heat preservation and sealing performance?

Hot air oven bladder stainless steel insulation sealing performance using superfine glass fiber filled heat preservation area, internal and external bile connection parts using non-metallic high-temperature materials, effectively lower high temperature conduction electrothermal blowing the rapid development of science and technology, more and more widely, the application of electrothermal blowing also attaches great importance to by environmental testing equipment manufacturers, stainless steel performance is remarkable, hot air drying oven bladder is lab for drying, baking, and sterilization is one of the ideal choice, when choosing a hot air oven, it is necessary for consumers to the tank stainless steel electric heating oven have a certain understanding.

In the drying process of the stainless steel electrothermal drying oven, the quantity and placement of the laboratory items affect the uniformity of the temperature in the working room. When the requirement of temperature uniformity is high, it is suggested to reduce the number of samples or choose the drying box of large number, so as to ensure the convection of hot air in the work room.

2~3cm or greater clearance between the inner wall or outlet of the sample is conducive to the convection of hot air inside the workshop. Temperature range of selection and use of temperature relationship: there are three kinds of hot air drying oven temperature range: RT + 10 ~ 200 ℃, RT + 10 ~ 250 ℃, RT + 10 ~ 300 ℃. The suitable temperature range can be selected according to the dry condition of the article. Electrothermal blowing general average normal heating rate at 2 ~ 8 ℃ / min, when the low temperature heating up fast, high temperature heating up slowly, when can be increased by increasing the heating power of heating rate. However, the heating power of the drying oven increases, and the temperature at constant temperature increases.

If you need more period of heating, heat preservation control or the heating rate and control, must be equipped with programmable temperature controller.

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The hot air oven circulation principle has those.

The hot air oven adopts the double motor horizontal circulating air supply, and the wind circulation is uniform and efficient. Pouring by circulating air supply motor drives the rotor by electric heater, and send the hot air, through the air duct to the hot air oven chamber, then after using air suction air duct become are again circulation, heating use. Ensure indoor temperature uniformity. When the temperature value fluctuates due to the opening and closing, it can be used to quickly restore the operating state temperature value.

1. Firstly, the heat transfer efficiency of each box in the hot air circulation oven can be effectively transferred by using the working principle of the heat transfer property of the network belt dryer.

2, hot air oven in the process of heating with the rest of the heat, when the residual heat reaches a certain value, it will break through the oven to transfer to other accessory in the oven, make the other motor heating oven can work.

3. When the hot air oven is gradually reduced to a constant value from the starting high temperature, the heat of the main oven will be absorbed by other oven, so that the temperature of all the oven can reach a constant value. Thus, the effect of hot air circulation is achieved, which is the value of hot air circulation oven.

Constant temperature air blast drying oven is the use of air circulation system in fan cycle air supply manner in the casing continuously circulation of hot air, the motor drives the rotor via the air heater which are constantly circulating air supply, and send the hot air, through the air duct arrived in oven chamber, then after using air suction air duct turns it into are cycle again. In the end, we use the material in the silicon oven crystal, so that the oven can reach a constant temperature.

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Overview of the structure of hot air oven.

Hot air oven baking varnish outer shell adopts the high quality steel plate surface, the working chamber is made of coated with high temperature resistance of high-quality steel or stainless steel, silver powder paint studio is equipped with 2 coated with high temperature resistance of silver powder paint made of high-quality steel or stainless steel wire shelf, shelf spacing can be adjusted, the middle layer filling superfine glass wool insulation.

The cabinet door adopts double tempered glass door or observation window. The vertical box door is equipped with double-layer tempered glass observation window, which can clearly observe the heating items in the box. A high temperature silicone rubber sealing ring is installed in the joint of the workshop and the box door to ensure the sealing between the workshop and the door. The control panel of the power switch, control instrument and other operating parts of the constant temperature drying box with the indicator light and the control instrument are set in the control panel at the bottom of the box. The table is set on the left front of the box body, and the vertical box is set in front of the box.

The heating temperature system in the box is mainly composed of a special low noise motor, electric heater, suitable air duct structure and temperature control instrument with centrifugal impeller. When turned on hot air drying oven electricity, motor is running at the same time, will directly into the bottom of the trunk or back electric heater heat through the air duct upward or forward, after work indoor dry goods, suction fan so cycle makes the uniform temperature is reached. Table and vertical large volume wind drying box damper can adjust the knob by opening the damper and adjust the air volume in the box.

Microcomputer intelligent control device, the use of self-tuning PID technology, compared with the traditional PID control has a rapid temperature control, fast response, small overshoot, high precision, the characteristics of set temperature and the temperature in the cabinet at the same time have a digital display, upper limit alarm and tracking with digital timer function, timing can be up to 9999 minutes. Use light touch to set parameters, easy to operate.

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Natural drying and constant temperature drying oven.

Food dry storage refers to the method of using natural condition or artificial control out a certain amount of moisture in food, to restrain the growth of the food kinds of microbial breeding, enzyme activity and the change of the food physical and chemical composition, increase food preservation method of storage performance. Dry storage mainly includes natural dry storage and artificial dry storage (such as hot air drying, vacuum drying, osmotic pressure dehydration, freeze-drying, etc.).

Dry Tibetan food has low water activity, long shelf life, reduced food quality, reduced volume, saving packaging and transportation costs, convenient to carry, and conducive to commodity circulation and other characteristics. Food dry storage has a long history, people have long used natural sunlight to dry cereal, fruits and vegetables and meat products, to extend the storage period, such as rice, corn, raisins, dried meat and so on. Natural drying cost, low energy, less equipment, processing cost is low, but the downside is that the production efficiency is low, need a large area of green coffees which and vulnerable to the harm of dust, insects, rodents, product quality, health and safety is difficult to guarantee.

With the advent of the industrial revolution, with the development of the mechanical industry, artificial dry storage technology developed rapidly, and the first artificial controlled heating and drying method was baked, baked and Fried. The drying oven and electric thermostatic drying oven, electric thermostatic drying oven, industrial oven and so on are fast, hygienic, good quality, industrial production and so on.

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Hot air oven has those temperature control system.

1. The economical series electric drum wind drying oven adopts electronic temperature control instrument for temperature setting and control mercury thermometer inserted from the top of the oven temperature shows that the temperature control system belongs to a type temperature control performance and reliable usage is convenient.

2. The basic and stainless steel series electric heating and drying oven adopts the intelligent digital temperature controller to set, display and control the temperature. The temperature regulator adopts the computer technology to collect and process the temperature signal in the working room, and the temperature in the working room can be kept constant temperature automatically. The temperature control system belongs to P.I.D. Intelligent control temperature is reliable and easy to use.

3. The stainless steel series hot air oven can also be used for setting, displaying and controlling the temperature of the intelligent program temperature regulator. The temperature control system can be used for setting and controlling temperature, temperature, temperature and time of temperature. The temperature regulator adopts the computer technology to collect and process the temperature signal in the working room, and the temperature in the working room can be kept constant temperature automatically. The temperature control system belongs to P.I.D. Intelligent control temperature is reliable and easy to use. And can be programmed according to the experiment. The intelligent temperature regulator has overtemperature protection function. In the working process of the equipment, if the temperature in the working room exceeds the set temperature value, the overtemperature protection circuit will cut off the heating circuit.

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The hot air drying principle has those.

The constant temperature air drying oven adopts the double motor horizontal circulating air supply mode, and the wind circulation is uniform and efficient. Pouring by circulating air supply motor drives the rotor by electric heater, and send the hot air, through the air duct to drum wind drying oven chamber, then after using air suction air duct become are again circulation, heating use. Ensure indoor temperature uniformity. When the temperature value fluctuates due to the opening and closing, it can be used to quickly restore the operating state temperature value.

1. Firstly, the heat transfer efficiency of each box in the hot air circulation oven can be effectively transferred by using the working principle of the heat transfer property of the network belt dryer.

2, hot air oven in the process of heating with the rest of the heat, when the residual heat reaches a certain value, it will break through the oven to transfer to other accessory in the oven, make the other motor heating oven can work.

3. When the hot air oven is gradually reduced to a constant value from the starting high temperature, the heat of the main oven will be absorbed by other oven, so that the temperature of all the oven can reach a constant value. Thus, the effect of hot air circulation is achieved, which is the value of hot air circulation oven.

Constant temperature air blast drying oven is the use of air circulation system in fan cycle air supply manner in the casing continuously circulation of hot air, the motor drives the rotor via the air heater which are constantly circulating air supply, and send the hot air, through the air duct arrived in oven chamber, then after using air suction air duct turns it into are cycle again. In the end, we use the material in the silicon oven crystal, so that the oven can reach a constant temperature.

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Hot air oven USES those methods.

1. matters needing attention.

Use the new oven or lay up for a long time, should be examined for damage, the examination of the insulation resistance and electric parts of tank shell and the insulation resistance between each other should be more than. 2. ohms, drying oven and power supply and firm, joint or you will damage due to poor contact, circuit part, this box is strictly prohibited flammable items in the trunk, so as to avoid an accident.

2. Use method.

(1). Connect the hot air oven to the local line, put it in the test body, and check the insulation resistance with the megohm meter to >2 trillion.

(2). Twist the adjustment of the instrument to the desired temperature. If the number is displayed according to the number set, twist to the desired temperature.

(3). Turn on the current 220V power supply and turn on the power switch. At this time, the green light is on, and the blower switch is set to the automatic position for heating. The blower should rotate.

(4). When the temperature of the studio reaches the desired temperature, it will stop automatically when the red light is on.

(5). After the use of the instrument, keep the hot air in the work room clean, and you can turn the blower switch to the manual position, disconnect the power supply and dry it with cloth.

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Does digital display electric hot air oven have requirements for the environment?

In order to make digital display blast electric hot air oven using the highest efficiency, the user necessary attention should be paid attention to in the process of using points, at the same time, combined with the daily maintenance work, then a simple introduce about digital display for everyone blast the attention points in the process of constant temperature drying box use.

1. After receiving the power supply, you can turn on the two sets of heating switches, and then set the key of the control meter to set the temperature you need. The indicator light is on, and the blower switch can be turned on, so that the blower can work.

2. When the temperature rises to the desired temperature, the indicator light goes out. The temperature will continue to rise at the beginning of the constant temperature, which is the residual heat effect, which will stabilize in about half an hour.

3. In the process of constant temperature, automatic control of temperature by means of box internal temperature control device, without manual management.

4. A set of heating switches can be turned off at constant temperature, and only one group of electric heaters is left to work, so as to avoid excessive power and affect the sensitivity of the constant temperature.

5. The digital display air drying box should be placed in the indoor level, and the switch of the iron shell should be installed in the power supply line, which is dedicated to this box and grounded.

6. When everything is ready, you can put in the test, close the door and open the exhaust valve at the top, then the power supply can be connected to the work.

7. Do not remove the side door arbitrarily, disturb or change the line, only when the box fails, the side door can be removed and checked by line.

8. It is a non-explosion-proof drying box with a constant temperature drying oven, so it is flammable and volatile. Do not put it in a drying oven, so as to avoid it.

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What kind of drying oven is suitable for medical treatment?

The use of drying box is more extensive, the variety is more, when choosing, still should pay attention to. As mentioned in the title, if it is a hospital, is it suitable for vacuum drying oven or drying oven? This is a question from the user. Both are dry boxes, but there is a difference in their application. One is the auxiliary mode of air exhaust ventilation, one is the way of vacuum negative pressure pumping to realize the drying effect we need.

Through to the moisture in the material, solvent or volatile components of molecular thermal effect, make its molecular motion through the dry material quickly and gradually make the material gets dry. Very quickly, the temperature is high.

If there is a function of blast, so under the action of fan, fast the material surface evaporates volatile substances molecules by air exchange and away, very quick can finish the whole drying process. This is the drying oven.

Is through the vacuum pump and vacuum drying oven to dry materials in the space into a so-called negative pressure vacuum state. As we know, in a vacuum, or low pressure condition, the moisture in the material, solvents and other volatile components of the boiling point is reduced, which can be separated from the material at low temperature condition particle surface by vacuum pump. It is mainly used in the oxidation and polymerization at high temperature materials and other chemical reaction. Of course, it also has heat to water, solvent and speed up the volatilization of volatile components from the materials on the surface of the dual role. How to choose mainly depends on what material you need to dry.

Applicable scope of drying box:

It is suitable for other departments which need dry goods, such as sterilizing supply center, operating room, laboratory, stomatology department and so on. It completely solves the problem that the drying ducts are the main products in the same kind of products, and the drying of the equipment in the drying tray is slow and dry. The medical dry cabinet is a special medical instrument sterilization drying equipment, mainly to meet the needs of hospital of cavity mirror, bottle of wetting, scalpel, hemostatic forceps, tweezers, suction device, catheters, switching tubes, all kinds of dishes, barrel, pressure device and equipment and dry thoroughly before sterilization, achieve sterilization before drying indicators, is the center of the hospital operating room, supply room, sterilized high equipment required.

Basic features of drying box:

1, suitable for storage temperature requirements of biological products, biological agents, drugs, blood or storage needs 2-48 ℃ between items;

2, the product is set in the process of constant temperature, the high and low temperature alarm function, when the casing temperature is close to zero or 5 degrees higher than the set temperature, the alarm sounds, click on any key to remove the alarm.

3. Applicable industries: medical and health industry, pharmaceutical inspection, environmental protection, food, health and epidemic prevention, etc., used for the storage of products such as reagents and vaccines for monitoring.

4. It has the function of safety lock to prevent the change of the original temperature setting.

Product use:

Is a smart new multi-function incubator, broad temperature between 2 to 48 degrees, the ability to set arbitrary values, plus or minus 2 ℃ temperature difference, especially suitable for medical treatment, sanitation, epidemic prevention, food, chemical industry, military industry, scientific research departments and so on.

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The drying oven is in great demand and the new technology is the key.

Drying equipment is one of the most widely used pharmaceutical equipment in pharmaceutical field. With the continuous improvement of domestic pharmaceutical production standards, the drying equipment has a higher demand for the technological capability and technical level of the equipment as it faces a broader market opportunity.

There are more than 5000 kinds of pharmaceutical enterprises in China, and only about 10% of enterprises have passed the certification of the new drug GMP. According to relevant experts predict, is expected to around twenty percent of the domestic pharmaceutical companies will not be able to reach the relevant standards and be eliminated within prescribed time limit, the remaining two or three thousands of pharmaceutical enterprises will have upgraded the critical period of this year.

Drying equipment is the most important API equipment and machinery. China, as the largest producer of raw materials in the world, has always had a great demand for drying oven. However, at present, the domestic API industry is actively transferring to the upstream of the industrial chain, and the original drying equipment cannot meet the higher production requirements. Therefore, large-scale equipment upgrade is imperative.

However, it should be noted that compared with developed countries, there is still a gap in quality and technical level of domestic products. Therefore, China's drying equipment manufacturers must constantly learn from international advanced technologies, combine practical experience, explore new technologies, develop new technologies, and take out new products to participate in market competition. Moreover, with the concept of "green production" is deeply rooted in the hearts of the people, drying oven price manufacturing according to the requirements of high quality, low energy consumption, environmental protection to adjust product structure, more need to further strengthen the study of new technology.

The experts pointed out that China's drying cabinet industry should be bigger and stronger, must constantly upgrade the technical level. In the face of broad market opportunities, only products that meet the diversified needs of customers can seize the opportunity. In the face of the technological advantages of imported equipment, it is imperative to realize the technological breakthrough of domestic equipment.

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The demand for drying oven equipment is growing, and the market is ready to go.

China's dryer market has great potential, and the drying equipment is constantly pursuing technological progress and r&d innovation. So far, our country type has relatively complete drying equipment, common drying equipment, such as vacuum drying oven, electric oven, constant temperature drying box, drum wind drying oven, purification, high temperature oven, drying oven, multi-function drying oven blast drying oven, oven, vacuum oven, multi-purpose oven, fast drying apparatus, critical point drying, spray drying machine, dehumidifier, dryer, ash tester, such as drying equipment, has been in the petroleum chemical industry, plastics, building materials, food, machinery, pharmaceutical, light industry and other fields has been widely applied.

Opportunities and challenges coexist. As a result of the market development trend of insight, foreign enterprises have also entered China's drying equipment industry, trying to get a piece of the action. Of course, compared with foreign enterprises, there is still a certain gap in the manufacture of dryer equipment in China. In addition, the development of domestic drying equipment industry has been characterized by small production scale, low entry threshold and low overall technical content.

According to statistics, the industry's annual sales income is 5 million yuan the following enterprises accounted for about 60% of the above, the annual sales income over ten million yuan manufacturers account for only 5% ~ 8%, the product is generally low, identical, the successful foreign enterprises occupied the part of the market. Now, however, experienced great development, and the emergence of high-tech products, expedites the emergence of drying equipment manufacturing backbone enterprises, the drying equipment industry in our country is developing towards the stability to the good trend.

Nowadays, positive change drying equipment industry development mode in our country, from low-end products to high-end products in the research and development, sales market moving westward, such as price competition into technological competition for development direction, improve domestic drying equipment enterprise research and development strength and technical strength.

In the transformation of a successful, some excellent domestic enterprises, research and development of drying equipment gradually won industry recognition and the user's favorite, for the development of domestic drying equipment, make its own efforts. Of course, in order to the further development of domestic drying equipment, similar to the excellent domestic drying equipment production enterprise also needs to make persistent efforts, from the technology, product quality, performance, promoting the further development of drying equipment in China.

Drying equipment production enterprise in our country at the same time, should also strengthen the communication with foreign technology, absorbing foreign advanced drying equipment, speed up the drying equipment in our country since the heating equipment dynamic control degree and appearance quality, complete and functional combination, narrow the gap with foreign products, improve the drying equipment products in the user trust, drying equipment in our country not only in the domestic market, and can also be dominated in foreign markets.

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How to use industrial oven correctly?

The oven is necessary for most processors. At the same time, in order to produce high-quality products, this process is also very important. Choosing reasonable oven technology can help to save cost and reduce energy consumption, while the correct evaluation of industrial oven technology and cost is of great significance for choosing the right oven technology.

The increase of water content will gradually reduce the shear viscosity of the material. In the process of processing, due to the change of melt flow performance, the quality of the product and a series of processing parameters will also change accordingly. For example, a prolonged period of stagnation will result in an increase in viscosity resulting from a low residual moisture content, which will lead to incomplete filling and a yellowing of the material. In addition, certain performance changes cannot be observed directly with the naked eye, but only by testing the material, such as mechanical properties and dielectric strength changes.

In selecting industrial oven manufacturers and vacuum oven, it is of vital importance to identify the performance of the oven. Materials can be divided into two types: hygroscopic and non-hygroscopic. Hygroscopic materials can absorb moisture from the surrounding environment. Non-absorbent materials cannot absorb moisture from the environment. For non-hygroscopic materials, moisture in any environment remains on the surface, becoming "surface moisture" and easy to be removed. However, colloidal particles made from non-absorbent materials may also become hygroscopic due to additives or fillers.

In addition, the calculation of the energy consumption of an oven process may be related to the complexity of the processing operation and other factors, so the values presented here are for reference only.

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What are the specifications and configuration of industrial oven?

(1) the shape: shape material adopt 2.0 mm thick cold plate bending and become the outside high temperature electrostatic pensu (not ordinary paint) corrosion, rust prevention, the dimensions according to the requirements, big two-door, with enhanced chrome plated square steel door lock, shake handshandle. The bottom of the industrial oven is equipped with a trolley track for easy access.

(2) the tank parts: bladder material USES 1.5 ㎜ thick SUS# 304 mirror stainless steel plate making, not rusting, corrosion resistant, easy to clean, making furnace clean and dust-free. Tank shop around 100 mm thick high temperature aluminum silicate insulation yanmian, all round the door to increase high temperature resistant silicone seal insert type, make the furnace temperature is not hot outside. Behind the oven is equipped with explosion protection agency's door.

(3) the heating part: built-in Taiwan stainless steel radiator heating tube to side of furnace chamber, at the top of the furnace chamber with 0.75 KW import Ed force carrying a wind motor, with a 10 inch and a half the wind turbines on top of the furnace cavity, two sides circulation wind around big air force transport way, inlet and outlet valve, adjustable air flow, make the furnace temperature is uniform.

(4) electrical parts: power 380 v, three-phase five wire, power industrial oven according to size, temperature, control electric box on the right side of the oven, using H721 type microcomputer intelligent LED display thermostat, adopt continuous buffered output module control heater, using SSR solid state relay 2 second heater control output. Subverts the traditional zero passage trigger when large current instantaneous impact, large fluctuations in temperature control, etc, with high cost performance E series 4-20 ma output type thermostat, can make the stable output voltage linear change and temperature control effect is more stable, performance is more outstanding, make more accurate temperature, temperature at room temperature to 250 ℃, arbitrary adjustable function of PID self-tuning, automatic constant temperature, automatic timing is equipped with manual and automatic timer switch, temperature to the electricity power regular alarm and overtemperature, earth leakage circuit breaker, motor overload protection function, timing, and overtemperature alarm and signal lights are respectively, according to the control and adopts double thermostat control, design, unique overtemperature has overtemperature limit temperature control points, to prevent damage to the product by the thermostat is out of control, make more accurate temperature, internal temperature plus or minus 2 degrees. The control box is equipped with multi-color working indicator light, which can show the working condition and failure of oven and industrial oven price.

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Kenton light chamber,which apply to biological tissue,cell,plant breeding,bacteria,micro-organisms,small animals such as insect breeding etc..Plant growth chamber can artificially simulate daylight and night light,the temperature is adjustable.

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Kenton stability chamber which apply to electrical and electronic products,the basic environmental procedures,the product of high temperature and low temperature test.It's the ideal choice for laboratory testing equipment that have excellent performance and good reliability.