Installation for thermal treatment of frozen dough pieces

FIELD: food industry.

SUBSTANCE: installation for thermal treatment of frozen dough pieces contains a horizontally positioned cylindrical screen body where a cylindrical resonator chamber is coaxially positioned so that their generatrices interface in one line wherein a milling mechanism is embedded. There are gaps, sized less than a quarter wave length, along the side surfaces of the resonator chamber and the screen body; the gaps are positioned in a single vertical plane. The UHF generator unit is installed on the base of the screen body so that the radiator is located inside the resonator chamber where dielectric rolls rotating by means of the motor reducer are positioned along the gap 12. There are screen overlaps for power flow radiation restriction between the gaps.

EFFECT: invention allows to intensify the dough pieces defrosting process.

1 dwg

 

The present invention relates to the field of electrical engineering, in particular to devices of microwave heating power supply, and can be used in the food industry to defrost the dough pieces in the production of bakery products.

There are four basic methods of freezing test preparations, and bakery products:

1. freezing the dough after kneading in pieces and blocks;

2. freezing dough pieces immediately after molding;

3. freezing dough pieces after proofing;

4. freezing products after partial or complete baking.

Consider freezing the dough after kneading in pieces and blocks. After kneading the dough is divided into pieces weighing from 100 g to 3 kg or more, pre-making them maximally flat for better freezing. Next, the workpiece is subjected to shock frozen and stored at -18C. After storage (before use) test workpiece is subjected defrostation for 30 min, the dough within 2 to 4 hours at +20...+25C and humidity 70...75%, baking for 10...25 minutes

The limiting factor in the use of such technology is to reduce the humidity test for a more elastic consistency, which leads to lower output test, as well as to the need for gluten.

Defrost (who apostasia) must be "sensitive", as there may occur the phenomenon of "growth" crystals, which cause damage to the membranes of yeast cells. After thawing will not be fluid loss, will not change the consistency and taste of the product.

Now apply different methods of defrosting.

1. The most common way is defrosting in the proofing Cabinet. From the point of view of quality of finished products it is considered the worst even at a relatively low temperature in the Cabinet (up to 30C). The surface layer of the dough pieces "Pereyaslavets", which negatively affects the quality of finished products. This particularly affects the workpieces weighing more than 200 g

2. Defrost at room temperature, followed by fermentation in the Cabinet for final proofing. This method is similar to the first and has the additional disadvantage is the likelihood of severiana dough pieces.

3. The most modern and best way to defrost frozen test semi-finished products using programmable cabinets final proofing - programmable democracia. The first phase of the defrosting is carried out at a temperature of 0C. While water is gradually transformed from solid to liquid, and prior to activation of the yeast (a homogeneous dough throughout the volume of the product), which reduces the efficiency is t-condensing. During the second phase of the defrost temperature is slowly increased from 0 to 20C and above. In this method it is important to ensure optimum humidity in the Cabinet for final proofing.

There are frozen dough and frozen after partial proofing. From these technological intricacies depends what way you need to defrost the dough. Product instant freeze to thaw a step by step process - first in the fridge, then at room temperature. The dough when thawed too high temperature becomes very soft and sticky.

An object of the invention is to develop a setup using microwave energy, providing an intensification of the process of thawing test billets for the production of bakery products.

This technical result is achieved in the following way. Installation for the heat treatment of frozen dough pieces, characterized in that it contains a horizontally positioned cylindrical screen body, inside of which is coaxially cylindrical resonator Luggage so that they form fit in one line, which is mounted grinding mechanism, and along the side surfaces of the resonator chamber and the screen case, there are gaps, smaller than a quarter wavelength, and they R sporogony on the same vertical plane, while the microwave generator block is set on the basis of the display housing so that the emitter is located inside the resonator chamber, where along the gap rollers are rotating from a motor reducer.

Figure 1 shows the scheme of installation for the heat treatment of the test preparations:

1 - the display housing 2 is a cylindrical resonator chamber, 3 - chopping mechanism (top-crusher), 4 - dough pieces, 5 - microwave generating unit, 6 - emitter, 7 - shredded dough pieces, 8, 9 - dielectric rolls (8 - fixed, 9 - mobile), 10 - dielectric guides, 11 - spring 12 - gap for forming a resonator chamber, 13 - screen walls, 14 - dough, 15 to the discharge conveyor.

Installation for the heat treatment of frozen dough pieces (figure 1) comprises a cylindrical screen body 1 within which is coaxially cylindrical resonator chamber 2. Their form joined, and this place is Top-crusher" 3 that allows to move and grind test pieces and blocks of 4. From the end on the display case installed microwave generator unit 5, so that the emitter 6 is a resonator chamber 2. Inside the resonator chamber 2 are shredded dough 7 and dielectric rolls 8, 9 complete with dielectric guides 10 and a spring 11, allows the soup to adjust the width of the gap between the rollers 8, 9. The bearings of the roller 8 is fixed, and the roll 9 is movable and held by means of a spring 11. Under this slit, cylindrical resonator Luggage along the generatrix has a gap 12, less than a quarter of the wavelength of electromagnetic radiation. The same gap has a generatrix of the display housing 1. The gaps form a channel, as there are screen walls 13. Through this channel passes dough 14 and falls onto the conveyor 15.

Installation for the heat treatment of frozen dough pieces is as follows. Include "Top-crusher" 3, load test pieces 4 in its receiving socket. At the same time include a microwave generator 5, and then in the resonator chamber 2 is formed of the electromagnetic field of the microwave range, as the emitter 6 is directed inside the resonator chamber 2 through the end of the display body 1. Shredded dough 7 gets into the resonator chamber 2, endogenous heated uniformly thawed and using dielectric guides 10 hits on the rolls 8, 9. Thus from rotating motor reducer roller 9 tighten thawed particles dough 7 into the slit, the width of which is governed by the spring 11. The dough is rolled between the rollers 8, 9 and falls onto the conveyor 15. The thickness of the rolled dough is determined by the width of the gap between the rollers 8, 9. If this is the gap and the gap 12 for forming a resonator chamber and screen enclosure should not exceed a quarter wavelength, to comply with sanitary norms for the power flux of the electromagnetic radiation of the microwave range. This is facilitated by the on-screen partition 13. To the test piece was captured rollers and rolled out, it is necessary that the angle of capture was less than the angle of friction of the test. Limit the rotational speed of the rolls are based on exclusion slippage lumps of dough on the surface of the rolls.

Installation for the heat treatment of frozen dough pieces, characterized in that it contains a horizontally positioned cylindrical screen body, inside of which is coaxially cylindrical resonator Luggage so that they form fit in one line, which is mounted grinding mechanism, and along the side surfaces of the resonator chamber and the screen case, there are gaps, smaller than a quarter wavelength, and they are located on the same vertical plane and are interconnected on-screen overlay, while the microwave generator block is set on the basis of the display housing so that the emitter is located inside the resonator chamber, where along the gap are dielectric rolls, rotating from the motor gearbox.



 

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