Industrial microwave ovens are used in catering establishments for prompt warming up, as well as preparation and defrosting of various products and ready meals using a high-frequency current of an electromagnetic field. Industrial microwave ovens operate in the following modes:
- microwave,
- convection,
- grill.
In addition, they can be combined for a more varied preparation of common dishes. Today, mechanical, electronic, and electromechanical control of microwave ovens is used.
As for the differences between professional equipment and household equipment, in general, professional ovens are similar to household ones, but they cook, reheat and defrost food much faster and in large quantities. That is why most entrepreneurs are trying to buy branded food equipment, and not be content with much less productive household counterparts.
In addition, industrial microwave ovens are more reliable and durable than household ones. They are able to withstand intensive use, that is, they can work continuously for a long time. Often they are equipped with additional programs, and almost always have a larger internal chamber.
Another distinguishing feature of professional microwave ovens from household ones is ultra-reliable shielding. It is for this reason that such ovens practically do not emit harmful electromagnetic waves. The door mechanism has a reinforced structure, and the professional microwave ovens themselves are built very rationally, which makes it possible to use the working volume of the chamber most efficiently.
Microwaves are not an essential piece of equipment for professional kitchens because they are less heavily involved in the cooking process. But lately, professional microwaves are increasingly being used in high-traffic bars, restaurants and fast food outlets.
Such equipment is already absolutely indispensable for restaurants and cafes offering full meals. Industrial microwave ovens are successfully used in large kitchens in hotels and airports.
Professional furnaces, like any other similar equipment, are distinguished by their increased wear resistance and the highest productivity. They are designed for really tough operation, and in an almost round-the-clock mode. The quality of such equipment is ensured by an extremely careful selection of materials of construction with excellent performance characteristics. Also, a great advantage of professional ovens is the greater mobility of heating and defrosting dishes, which becomes an indispensable quality when there is a need to increase the throughput of a certain catering enterprise.
Compared to other professional equipment, the advantage of microwave ovens is the economy in power consumption, since most models operate on a single-phase current network and bring products to readiness in a very short time. Most microwave ovens are made of stainless steel, lined with plastic or the same stainless steel on the outside. The inner chamber is made without seams, which greatly facilitates its maintenance.
Which is better: infrared wood dryer or microwave analog? To understand, you need to understand how they work, as well as compare the main indicators. What we are going to do.
Wood is a hygroscopic material that contains moisture and is able to absorb it from the outside. Lumber on sale is of two types: with natural moisture and dried. The latter are more expensive, since they are ready for use immediately after purchase. Therefore, many sawmill owners are interested in purchasing wood dewatering equipment.
The market offers several options for wood drying plants. Today we will consider infrared dryers and microwave installations, we will understand the principle and parameters of their operation, we will determine how to organize the production process using them. Having detailed information about different types of equipment, it will be much easier to decide which one will be optimal for a particular production.
Principle of operation
Infrared Dryers suggest drying wood by heating it with infrared rays. This method does not require the use of a coolant, the organization of the ventilation system and the presence of complex control automation. Drying does not lead to internal stress and warping of the wood. It is possible to change the drying mode depending on the quality of the source material.
The principle of operation of the microwave dryer is similar to the operation of a microwave oven. Drying occurs under the influence of microwave radiation: the moisture in the wood heats up and boils, the excess pressure created by the hot steam squeezes it out. Excess moisture is removed by reversible fans.
The mode of attenuation of the microwave wave makes it possible to regulate the drying temperature.
Appearance
Infrared Dryers are a set of thermoactive cassettes, only 1.5 mm thick. These cassettes are stacked in a certain sequence in a pile of lumber prepared for drying. 
Microwave dryers look like a closed metal container, in most cases equipped with a motorized cart with an electric drive for more convenient placement of a pile of sawn timber inside the structure. Additionally, a control unit is installed.
Size and weight
One of the main advantages of infrared dryers is their portability. Standard thermosetting cassette has a size of 1230 x 650 x 1.5 mm and a weight of 5.7 kg, which allows you to easily transport the entire set of equipment for drying wood in the trunk of a car. The weight of a set of 12 cassettes is 69 kg, and in a crate with a shield and cable routing - no more than 130 kg.
Microwave installation has much larger dimensions and weight. So, the chamber, designed for drying 6-9 cubic meters of sawn timber, has a length of more than 6 meters, a width of 1 meter and a height of about 2 meters. At the same time, its weight is 9 tons, and the area required for the installation of equipment is 3x17 m. To transport the microwave installation from place to place, you will need to use special equipment.
Autonomy of work
Infrared dryer completely autonomous, with its correct installation and connection, you will not need to constantly monitor the drying process.
Microwave installation, in which the material is dehydrated by high-frequency currents (915-2500 MHz), requires regular monitoring by the operator to prevent the wood from burning inside the chamber.
Drying time
Naturally, the drying time of sawn timber depends on its moisture content in its original state and the type of wood.
Through infrared thermoactive cassettes any kind of wood can be dried. Drying time to 8% pine moisture is 3-7 days. The thinner the boards and the higher the moisture content to be achieved, the less time it will take to dry.
Regarding Microwave dryers It is known that the "SHCh-LES" installation of the "INVESTSTROY" company is able to dry pine timber 200x200 mm with a moisture content of 50-70% to 18% in 22 hours (after the material has cooled down, the moisture content decreases to 10.2%).
Source of power
Infrared cassettes work from an ordinary household power supply network of 220 V.
For work Microwave drying plant power supply 380V, 50 Hz will be required.
Power and electricity consumption
Maximum power of the installation from infrared cassettes: 3.3 kW / m³. Electricity consumption during the drying of 1m³ of wood: 100-400 kW * h.
Average power consumption microwave installations: 58 kW, and the specific energy consumption for the drying process is 200-230 kW * h / m³.
Price
One of the most significant indicators when purchasing new equipment for work is its market value.
The prices for infrared dryers FlexiHIT are very democratic:
- equipment for drying 1 m³ of a three-meter board will cost 59,288 rubles;
- equipment for drying 1 m³ of a four-meter board will cost 69,329 rubles;
- equipment for drying 1 m³ of a six-meter board - 70,007 rubles.
Moreover, the prices are indicated for the entire set of equipment, which contains 12 thermoactive cassettes, a control panel, cabling and crate.
In Russia Microwave installations, as noted above, is produced by the company "INVESTSTROY". Such a dryer costs from 1,300,000 rubles. In addition, when planning its purchase, you need to take into account that a magnetron (a device that generates microwaves) is a consumable item. It will need to be replaced at least once a year. The cost of the magnetron is 150,000 rubles.
conclusions
It is worth noting that both options of the considered dryers are new technologies, but already successfully used in our country.
Undoubtedly the convenience of infrared equipment is the possibility of using it, both indoors and outdoors, mobility and low price. Such equipment can be used in production and in everyday life. Ease of installation allows you to completely assemble the dryer within one day, and if necessary, quickly disassemble it and transport it to another place. At the same time, the drying quality meets the most stringent requirements. 
The advantage of the microwave installation k is the ability to quickly dry thick beams and rounded logs with a diameter of up to one meter. Their use is justified in production, where it is a question of preparing for the further use of large workpieces. But with a less impressive scale, this technology is practically inaccessible due to its high cost and size.
No matter how fans of a healthy lifestyle advocate for the valuable properties and a storehouse of vitamins in fresh vegetable salads, most people still prefer to combine them with hot meals. Compact, powerful, professional microwave ovens for restaurants and cafes from the WhiteGoods online store will heat up meat, side dishes, soups, pies, hot dogs, pizza, hot sandwiches and any prepared dishes in a matter of seconds. It is a reliable, convenient and affordable solution for catering enterprises of any level.
Microwave oven is a wise compromise in confined spaces
Microwaves have become a reasonable compromise for cafes and food service outlets, where the lack of production space barely allows you to place a refrigerator, coffee maker, etc., and not just an oven and, even more so, in a hot workshop. This compact appliance is able to meet the hot food needs of customers and get you the sales you deserve. Modern microwave ovens for restaurants from the line of advanced models combine innovative technologies such as convection function, multi-level power control, several defrosting modes, pre-programmed programs for up to 360 recipes, an exhaust air purification system (catalytic converter), etc. Extensive functionality turns these small appliances into versatile pieces of equipment that will become a lifesaver in your restaurant, diner or cafe.
Express-class heating equipment for a successful business!
Professional microwave ovens are absolutely indispensable equipment for grocery stores with hot snack stands, cafes without their own kitchen, bistros, food courts based on semi-finished products and other ready-made food outlets. Due to the ergonomic shape of the case, the devices are easy to maintain and maintain hygiene standards. The main differences between a professional microwave oven and household models:
- increased power, thanks to which you will reduce the heating time by 42% -60% (hot sandwich / pizza in 4-9 seconds, cheeseburger - 20 seconds);
- uniform heating of dishes without drying out the edges or undercooking the middle, inherent in household microwave ovens, will exclude marriage or dissatisfied reviews of restaurant visitors;
- increased useful volume of the working chamber;
- extended timer up to 60 min;
- many combined modes: microwave technology, grill, defrosting, cooking, convection, etc.;
- Glassy enamelled hard-wearing restaurant microwave oven casing is robust and designed for heavy use in commercial kitchens. Plus durable reliable parts of the mechanism.
Thanks to its stylish design and rich color range, a microwave oven for a cafe will become an interesting addition to the interior and will take its rightful place on the bar counter. A good model of a professional microwave will help you pamper your visitors with both juicy meat or fish with a delicate taste, as well as fragrant pastries with an appetizing golden crust that will look fresh, as if fresh from the oven.
Where to buy good microwave ovens for restaurants and cafes?
Flexibility and versatility, with the greatest preservation of usable space, explain the high demand for equipment of this class. A high-speed, easy-to-operate restaurant microwave will provide significant time savings for chefs and add extra convenience to the professional kitchen. Prompt customer service will have a beneficial effect on the profitability of the establishment.
In the WhiteGoods online store you can buy the most popular, universal, professional microwave ovens for cafes, restaurants and other catering establishments. Stunning reliability and high efficiency - these are the distinctive features of professional equipment from the WhiteGoods catalog. Our microwave ovens will perfectly fit into the concept of any kitchen, save time and money!
Description
The industrial microwave unit WSZ is a tunnel type sterilizer. Typically, heat transfer occurs as the surface of the equipment transfers heat to the surface of the material, which then transfers heat to the interior of the material. Thermal conduction occurred through convection or radiated wave. This method has always had the negative factor of slowly reaching the desired temperature for sterilization. Microwave installations emit in such a way that they react directly and quickly to existing bacteria in the material. Thermal and non-thermal effects are both effective in this case, thus shortening the processing time. The sterilization process, depending on the properties of the material, usually takes 3-5 minutes. The sterilization temperature in the chamber ranges from 70 ℃ to 90 ℃.
Application
This equipment is used to sterilize and dry the following types of materials: spices, food additives, protein powder, meat products, seafood, fruits, legumes, vegetables, mushrooms, wheat, starch, animal feed and so on, spreading in a wide variety of industries, including food, pharmaceutical, agricultural.
Peculiarities
1.Has an automatic temperature control system, a microwave density control system, a heating time control system, an alarm system, and a video surveillance system.
2.Takes up small space, instant heating speed, even heat transfer, good maneuverability and controllability, easy operation, energy saving and low cost.
3. The transformer can be with different types of cooling, including water, air and self-cooled. Able to work 24 hours in a row, continuously.
4.Leakage rate meets UL national and American quality standards.
Technical characteristics of an industrial microwave installation
| Model | WSZ-1 | WSZ-2 | WSZ-3 | WSZ-4 |
| Frequency (MHz) | 2450 + 150 MHz | |||
| Power, kWt) | 9 kW, configurable | 12 kW, customizable | 24 kW, customizable | 48 kW, configurable |
| Drying process (kg / kWh) | 1 kg / kWh | |||
| Conveyor width (mm) | 450 | 450 | 450 | 450 |
| Conveyor speed (rpm) | 0.4-6 | 0.4-7 | 0.4-10 | 0.4-15 |
| Power (kW) | < 15 | < 20 | < 40 | < 80 |
| Dimensions (mm) | 6000 × 800 × 1500 | 8000 × 800 × 1500 | 10000 × 800 × 1500 | 16000 × 800 × 1500 |
Yangzhou Yutong Drying Equipment Co., Ltd is an industrial microwave oven manufacturer and supplier in China. In addition, we also supply mixing, granulating equipment, extractors and concentrators. The enterprise has received an AAA credit rating from the Jiangsu International Credit Assessment Company. Our industrial microwave systems have long been trusted by manufacturing companies.
Microwave unit for drying bulk materials.
Our company specializes in the development, design, engineering and testing of equipment in order to obtain a reliable and high-quality product for drying and heat treatment of bulk materials. A sample with a maximum power of 2 kW (power controlled by software) and water cooling has successfully proven itself in the technological process. Application in various industries is possible.
Microwave heating and its application:
Technological processing of a wide variety of objects almost always includes heat treatment and primarily heating or drying. With traditional methods of heating and drying (convective, radiation and contact), the object is heated over the surface. If the thermal conductivity of the object is low, which is the case with dielectrics, then the heat treatment of the object occurs slowly, with local overheating of the heating surface, which may cause burning of this surface, the occurrence of internal mechanical stresses. All this can ultimately lead to the failure of the facility.
Super-high-frequency heating of an object is called the energy of the electromagnetic field of ultra-high frequencies. An electromagnetic wave, penetrating into an object, interacts with charged particles. The combination of such microscopic processes leads to the absorption of field energy in the object. A complete description of the effect can be obtained only with the help of quantum theory. We restrict ourselves to taking into account the macroscopic properties of the material medium described by classical physics.
Depending on the location of charges in them, the molecules of the dielectric medium can be polar and non-polar. In some molecules, the arrangement of charges is so symmetrical that in the absence of an external electric field, their electric dipole moment is zero. Polar molecules have a certain electric dipole moment even in the absence of an external field. When an external electric field is applied, non-polar molecules are polarized, that is, the symmetry of the arrangement of their charges is violated, and the molecule acquires a certain electric moment. Under the action of an external field, polar molecules not only change the magnitude of the electric moment, but also rotate the axis of the molecule in the direction of the field. Usually, a distinction is made between electronic, ionic, dipole and structural polarization of a dielectric. At microwave frequencies, dipole and structural polarizations have the greatest specific gravity, so that heat release is possible even in the absence of a conduction current.
Microwave devices for technological purposes operate at frequencies established by international agreements. For heat treatment in the microwave range, electromagnetic oscillations are most often used at frequencies of 433, 915, 2375 (2450) MHz.
The table provides information on the depth of penetration of an electromagnetic wave into some of the dielectrics with losses.
Depth of penetration of an electromagnetic wave in a dielectric with losses at 20-25Со
| dielectrics
|
penetration depth, mm
|
|||||
| 433 MHz | 915 MHz | 375 MHz | ||||
| barium titiant | 11,3 | 3,5 | 0,6 | |||
| methyl alcohol | 33,0 | 7,8 | 1,4 | |||
| water | 70,5 | 23,4 | 3,5 | |||
| glass | 4600 | 2180 | 840 | |||
So, if instead of traditional heating methods, heating using the energy of microwave oscillations is used, then due to the penetration of the wave into the depth of the object, this energy is converted into heat not on the surface, but in its volume, and therefore it is possible to achieve a more intense increase in temperature with greater uniformity heating compared to traditional heating methods. The latter circumstance in some cases leads to an improvement in the quality of the product. Microwave heat treatment has a number of other advantages. So, the absence of a traditional heat carrier ensures the sterility of the process and the inertia-free heating control. By changing the frequency, you can achieve heating of various components of the object. Microwave electrothermal installations occupy a smaller area than similar installations with a traditional power drive, and have less harmful impact on the environment with better working conditions for the service personnel. Microwave installations and their working chambers.
For any purpose of the microwave electrothermal installation, it has a structural diagram shown in Figure 1.
A prototype of a microwave oven manufactured for Polisorb LLC
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