CN112616867A

CN112616867A - Continuous vacuum frying device convenient for reverse flow of heat conduction oil

Info

Publication number: CN112616867A
Application number: CN202110146356.6A
Authority: CN
Inventors: 程长青; 葛邦国; 陶永清
Original assignee: Mengzhou Yuanhong Drying Equipment Research and Development Co Ltd
Current assignee: Mengzhou Yuanhong Drying Equipment Research and Development Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-04-09

Abstract

The invention discloses a continuous vacuum frying device convenient for reverse flow of heat conduction oil, which comprises a frying section, a lifting oil draining section and an oil circulating system, wherein the frying section is provided with a plurality of oil draining holes; the deep-frying section comprises a deep-frying cylinder, an exhaust bin and an oil residue bin, the front section of the deep-frying cylinder is a non-mesh cylinder, the rear section of the deep-frying cylinder is a mesh-equipped cylinder, and the non-mesh cylinder and the mesh-equipped cylinder are connected into a whole; a first transmission shaft is arranged in the frying cylinder, a conveying helical blade is arranged on the first transmission shaft, the first transmission shaft extends to the outside of the frying cylinder and is connected with a motor, a feed hopper is arranged above the non-mesh cylinder and is connected with the non-mesh cylinder through a feed barrel, a first air seal device is arranged on the feed barrel, the oil residue bin is wrapped and arranged below the frying cylinder, and the exhaust bin is arranged above the mesh cylinder; has the advantages that: the frying process goes through the processes of preheating, frying and lifting oil draining, and continuous vacuum frying can be realized.

Description

Continuous vacuum frying device convenient for reverse flow of heat conduction oil

Technical Field

The invention relates to the field of frying machinery, in particular to a continuous vacuum frying device convenient for reverse flow of heat conduction oil.

Background

Vacuum frying is a food processing technology developed in the end of the sixties and early seventies of the twentieth century that can produce fruit and vegetable crisps with low oil content and that can produce desirable texture and flavor characteristics. Vacuum frying refers to a process of dehydrating and frying fruits and vegetables under negative pressure. Because the vacuum frying is carried out under the negative pressure condition, the boiling point of the water in the fruit and vegetable slices can be reduced in the frying process, so that dry products with better sensory and nutritional quality than common frying are produced, and the harm caused by oxidation reaction can be reduced or avoided by carrying out food processing under the relatively anoxic condition. Vacuum frying, however, still exists during application: 1. continuous vacuum frying cannot be achieved. 2. The thermal efficiency of the heat energy of batch vacuum frying oil is low. 3. The frying time is troublesome to operate and is not easy to control. 4. The oil on the surface of the vacuum fried product can not be drained synchronously, so that the oil content of the product is high. 5. The oil drained from the oil leaching can not be directly and synchronously utilized, and the oil required by the frying needs to be continuously supplemented. 6. The conveying helical blade arranged on the transmission shaft in the frying cylinder blocks the oil in the counter flow in the fruit and vegetable conveying process, so that the counter flow conveying power is increased.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a continuous vacuum frying apparatus that facilitates reverse flow of heat transfer oil.

The invention realizes the purpose through the following technical scheme:

the continuous vacuum frying device convenient for reverse flow of heat-conducting oil comprises a frying section, a vacuum unit, a lifting oil-draining section and an oil circulating system;

the deep-frying section comprises a deep-frying cylinder, an exhaust bin and an oil residue bin, the front section of the deep-frying cylinder is a non-mesh cylinder, the rear section of the deep-frying cylinder is a mesh-equipped cylinder, and the non-mesh cylinder and the mesh-equipped cylinder are connected into a whole; a first transmission shaft is arranged in the frying cylinder, a conveying helical blade is arranged on the first transmission shaft, the first transmission shaft extends to the outside of the frying cylinder and is connected with a motor, a feed hopper is arranged above the non-mesh cylinder and is connected with the non-mesh cylinder through a feed barrel, a first air seal device is arranged on the feed barrel, the oil residue bin is wrapped and arranged below the frying cylinder, and the exhaust bin is arranged above the mesh cylinder;

the conveying helical blade is made of a mesh plate, the mesh hole on the helical blade can dredge and guide the flow of the counter-flow oil, and the conveying power of the counter-flow oil is not large; the fried fruit and vegetable slices are forward under the rotating and pushing action of the helical blades, oil can flow reversely through meshes on the helical blades, and the meshes on the helical blades conduct dredging and drainage on the oil flowing reversely, so that the physical requirement of reverse flow of the oil is met. The spiral blade with the same thickness has stronger supporting strength with meshes; the weight of the spiral blade with meshes is reduced greatly, and the power required for rotation is also reduced. The oil in the frying cylinder is conveyed in a countercurrent manner, and the power required by the oil passing through the spiral blade with meshes is not large.

The lifting oil draining section comprises a lifting cylinder and an oil draining bin, the lifting cylinder and the frying cylinder are connected into a whole and are obliquely arranged, the bottom of the lifting cylinder is provided with an oil draining net, the oil draining bin is wrapped below the oil draining net, and the oil draining bin is communicated with the oil residue bin; the exhaust bin of the frying section is communicated with the lifting cylinder, and a plurality of air holes are formed in the joint of the exhaust bin and the lifting cylinder; the lifting cylinder is provided with a discharge end close to the upper end, an exhaust port is arranged above the discharge end, the exhaust port is connected with a vacuum unit, a discharge hopper is arranged below the discharge end, the discharge hopper is connected with the lifting cylinder through the discharge cylinder, and a second air seal device is arranged on the discharge cylinder; a second transmission shaft is arranged in the lifting cylinder, the second transmission shaft is connected with the first transmission shaft through a universal joint coupler, and a lifting helical blade is arranged on the second transmission shaft;

the vacuum unit comprises a condenser and a vacuum unit. The vacuum condensation exhaust method of the vacuum unit is a mature technology, and the invention is not described in detail;

the oil circulating system comprises a circulating oil pipe, an oil pump and a heating device are mounted on the circulating oil pipe, an oil inlet of the circulating oil pipe is connected with the bottom of the feeding end of the frying cylinder, an oil outlet of the circulating oil pipe is connected with the upper part of the lifting cylinder, and the flowing direction of oil is reverse to the conveying direction of the fruit and vegetable slices under the pumping and discharging action of the oil pump;

wherein the oil level line of the frying device is higher than the frying cylinder.

By adopting the technical scheme, the fried fruits and vegetables become light and can float on the oil, the oil level line of the oil is arranged on the frying cylinder, the frying cylinder can restrict the fruits and vegetables to be soaked in the oil all the time, and the frying uniformity and effect are improved. The frying process comprises the following steps: the fried fruit and vegetable slices enter the frying cylinder from the feed hopper, are conveyed forward for frying under the driving action of the conveying helical blades and oil, are fried in the conveying cylinder and then are conveyed to the lifting cylinder, and are lifted to the discharge hopper through the lifting helical blades in the lifting cylinder to be output, namely, the continuous frying is completed.

Wherein, in the moisture that produces in the frying process gets into the exhaust bin through the mesh of taking mesh barrel top to exhaust bin and lifting cylinder intercommunication can discharge the moisture in the lifting cylinder, and discharge by the vacuum unit pump drainage through the gas vent. Moisture generated in the frying process enters the exhaust bin to increase the frying mass transfer speed of the fruit and vegetable slices.

At promotion waterlogging caused by excessive rainfall section, the fruit vegetables piece can carry out the waterlogging caused by excessive rainfall net to the oiliness rate after reducing the fruit vegetables piece and frying, it is more healthy to eat. And the drained oil is discharged to an oil residue bin through an oil draining bin below the oil draining net. The drained oil is directly and synchronously utilized, and the supplement of the oil is reduced.

Fruit vegetables are at the dregs of fat in-process, the flavouring of pickling breaks away from when fried and forms the dregs of fat on the fruit vegetables, the big dregs of fat of proportion deposits the dregs of fat storehouse through the mesh of taking mesh barrel below, the proportion is little along with the fruit vegetables piece removes to promoting a section of thick bamboo, because the oil level line is on frying a section of thick bamboo, consequently, the front end that promotes a section of thick bamboo also has oil, when promoting the fruit vegetables piece, the little dregs of fat of part proportion can contact with the oil drainage net, the seepage is to in the oil drainage storehouse, then deposit and discharge the dregs of fat storehouse, the little dregs of fat of another part proportion is along with the fruit vegetables piece discharges. The oil residue in the oil residue bin can be cleaned once after a period of time by opening the residue discharge port.

During oil circulation, an oil inlet of the circulating oil pipe is connected with the bottom of the feeding end of the frying cylinder, an oil outlet of the circulating oil pipe is connected with the upper portion of the lifting cylinder, oil in the frying cylinder is in reverse direction with the conveying direction of the fruit and vegetable pieces through drainage of meshes on the spiral blades, a preheating section and a frying section are formed in the frying cylinder, the fruit and vegetable pieces are gradually heated and fried, and oil residues in the oil residue bin can be washed towards the residue discharge port by the reverse oil. Under the pumping action of the oil pump, the high-temperature oil circularly flows in the frying cylinder, the circulating oil pipe and the heating device.

As a preferred embodiment of the scheme, the mesh-free barrel is 1/3-2/5 of the frying barrel, and the meshed barrel is 3/5-2/3 of the frying barrel.

As a preferred embodiment of the scheme, a slag discharging port is arranged at the feed end of the oil slag bin, which is close to the frying cylinder, the bottom of the oil slag bin is inclined towards the slag discharging port, and a third air seal is arranged at the slag discharging port.

Preferably, guide wheels are arranged at the positions, close to the universal joint coupler, of the conveying spiral blade and the lifting spiral blade, and the guide wheels are installed at the edge of the spiral blade and are in contact with the conveying cylinder or the lifting cylinder.

Preferably, the oil in the lifting cylinder is positioned at 1/2-2/3 of the oil draining net.

Preferably, the oil pump is arranged close to an oil inlet of the circulating oil pipe, and the heating device is arranged close to an oil outlet of the circulating oil pipe.

Preferably, the position of the feeding barrel is also connected with an oil supplementing pipe.

In conclusion, the beneficial effects of the invention are as follows: the frying process goes through the processes of preheating, frying and lifting oil draining, and continuous vacuum frying can be realized.

In this application 1, under the pump drainage effect of oil pump, high temperature oil circulates in deep-fry section of thick bamboo, circulating oil pipe and heating device and flows. The temperature of the oil can be maintained and the oil is filtered and circulated. The heat energy of the continuous vacuum frying oil has high heat efficiency, the oil heat energy is only energy consumption required by water evaporation during fruit and vegetable frying, and other heat energy consumption is not available.

2 the direction of oil in the frying cylinder is reverse to the direction of conveying the fruit and vegetable pieces through the drainage of meshes on the spiral blades, and a preheating section and a frying section are formed in the frying cylinder, so that the fruit and vegetable pieces are gradually heated and fried.

3. The fruit and vegetable pieces in the frying cylinder move forwards under the rotating and pushing action of the helical blades, water can flow reversely through meshes on the helical blades, and the meshes on the helical blades conduct drainage on the oil flowing reversely, so that the physical requirement of reverse flow of the oil is met.

4. Moisture generated in the frying process enters the exhaust bin to increase the frying mass transfer speed of the fruit and vegetable slices.

5. The frying time is simple to set and is controlled by the rotating speed of the conveying helical blade.

6. The oil that drips is discharged to the dregs of fat storehouse through the oil dripping storehouse of oil dripping net below, and the direct synchronous utilization of oil that drips has reduced the replenishment of oil.

7. The oil on the surface of the product after vacuum frying can be simultaneously drained, and the oil content of the product is low.

8. The positions of the conveying helical blade and the lifting helical blade, which are close to the universal joint coupler, are respectively provided with a guide wheel, and the guide wheels are arranged on the edges of the helical blades and are in contact with the conveying cylinder or the lifting cylinder.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a structural view of the present invention;

FIG. 2 is a structural view of another embodiment of the present invention;

FIG. 3 is a block diagram of the filter cartridge of the present invention;

fig. 4 is a structural view of the screw blade of the present invention.

The reference numerals are explained below:

1. a frying cylinder; 1a, a cylinder without meshes; 1b, a cylinder body with meshes; 2. a motor; 3. a first drive shaft; 4. a conveying screw blade; 5. an exhaust bin; 6. an oil line; 7. a lifting cylinder; 7a, air holes; 8. a second drive shaft; 9. lifting the helical blade; 10. an oil draining net; 11. an oil draining bin; 12. an oil residue bin; 13. a third air seal machinery; 14. a slag discharge port; 15. a second air seal machinery; 16. a discharge hopper; 17. an exhaust port; 18. a vacuum unit; 19. a circulating oil pipe; 20. an oil pump; 21. a heating device; 22. supplementing an oil pipe; 23. a feed hopper; 24. a first airlock; 25. a guide wheel; 26. a universal joint coupling; 27. a filter cartridge; 27a and an oil inlet hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a continuous vacuum frying apparatus facilitating reverse flow of heat transfer oil, including a frying section, a vacuum unit 18, a lifting oil draining section, and an oil circulating system; the frying section includes frying section 1, exhaust storehouse 5 and dregs of fat storehouse 12, 1 anterior segment of frying section is no mesh barrel 1a, the back end is for taking mesh barrel 1b, and no mesh barrel 1a links as an organic wholely with taking mesh barrel 1b, because oil circulation system makes the oil circulation in this application, and the flow direction of oil is reverse with the convenience that the fruit vegetables piece was carried, consequently all below oil is the preheating section at the unloading, the fruit vegetables piece just gets into in frying section 1, can not produce the bubble, and can produce the moisture among the hot frying process, the moisture gets into exhaust storehouse 5 through the upper portion mesh of taking mesh barrel 1b in, the moisture that the fruit vegetables fried release is taken out by vacuum unit 18 through gas vent 17. Be provided with first transmission shaft 3 in the deep-fry section of thick bamboo 1, be provided with on this first transmission shaft 3 and carry helical blade 4 to first transmission shaft 3 extends to 1 outside of deep-fry section of thick bamboo is connected with motor 2, no mesh barrel 1a top is provided with feeder hopper 23, feeder hopper 23 is connected with no mesh barrel 1a through lower feed cylinder, install first airlock 24 on the feed cylinder down, 12 parcel settings in dregs storehouse are in the below of deep-fry section of thick bamboo 1, exhaust storehouse 5 sets up take mesh barrel 1 b's top. The conveying helical blade 4 is made of a mesh plate, the mesh hole on the helical blade can dredge and guide the flow of the counter-flow oil, and the conveying power of the counter-flow oil is not large; the fried fruit and vegetable slices are forward under the rotating and pushing action of the helical blades, oil can flow reversely through meshes on the helical blades, and the meshes on the helical blades conduct dredging and drainage on the oil flowing reversely, so that the physical requirement of reverse flow of the oil is met. The spiral blade with the same thickness has stronger supporting strength with meshes; the weight of the spiral blade with meshes is reduced greatly, and the power required for rotation is also reduced. The oil in the frying cylinder 1 is conveyed in a counter-current mode, and the power required by the oil is not large when the oil passes through the spiral blades with meshes.

The lifting oil draining section comprises a lifting cylinder 7 and an oil draining bin 11, the lifting cylinder 7 and the frying cylinder 1 are connected into a whole and are obliquely arranged, and preferably, the included angle between the lifting cylinder 7 and the frying cylinder 1 is 135-150 degrees. The bottom of the lifting cylinder 7 is provided with an oil draining net 10, oil on the surface of the vacuum fried fruit and vegetable slices can be drained synchronously through the oil draining net 10, and the content of products is low. The oil draining bin 11 wraps the lower portion of the oil draining net 10, namely the oil draining bin 11 is an arc-shaped bin body, the oil draining bin is hermetically welded below the lifting cylinder 7, the length of the oil draining bin is larger than that of the oil draining net 10, and the oil draining bin 11 is communicated with the oil residue bin 12. The air exhaust bin 5 of frying section with promote a section of thick bamboo 7 intercommunication, and a plurality of gas pockets 7a have been seted up to junction between them, set up in a plurality of gas pockets 7a can make the exhaust moisture of fruit vegetables piece arrange and promote a section of thick bamboo 7, set up in the gas pocket 7a part can avoid fruit vegetables piece entering air exhaust bin 5 simultaneously. A discharge end is arranged at the upper end of the lifting cylinder 7, an exhaust port 17 is arranged above the discharge end, the exhaust port 17 is connected with a vacuum unit 18, a discharge hopper 16 is arranged below the discharge end, the discharge hopper 16 is connected with the lifting cylinder 7 through the discharge cylinder, and a second air seal device 15 is arranged on the discharge cylinder; a second transmission shaft 8 is arranged in the lifting cylinder 7, in order to connect the first transmission shaft 3 with the second transmission shaft 8 conveniently, the second transmission shaft 8 is connected with the first transmission shaft 3 through a universal joint coupler 26, and a lifting helical blade 9 is arranged on the second transmission shaft 8. The frying time can be controlled by controlling the rotating speed of the helical blades, and the frying time is simple to set.

The oil circulating system comprises a circulating oil pipe 19, an oil pump 20 and a heating device 21 are installed on the circulating oil pipe 19, an oil inlet of the circulating oil pipe 19 is connected with the bottom of a feeding end of the frying cylinder 1, an oil outlet of the circulating oil pipe is connected with the upper portion of the lifting cylinder 7, the flowing direction of oil is reverse to the conveying direction of fruit and vegetable slices under the pumping and discharging action of the oil pump 20, oil and oil residues in the oil residue bin 12 can flow to the residue discharging port 14, oil in the frying cylinder 1 can flow to the feeding end, a preheating section and a hot oil section are formed, gap type vacuum frying is formed, the thermal efficiency of the thermal energy of the intermittent type vacuum frying oil is high, the oil thermal energy is only energy consumption required by water evaporation during fruit and vegetable frying, and other thermal energy consumption is not available.

Wherein the oil level line 6 of the frying apparatus is higher than the frying pan 1. The oil level line 6 of the oil is arranged on the frying mesh cylinder, the fried fruits and vegetables become light and float on the oil, and the frying cylinder 1 can restrict the fruits and vegetables to be soaked in the oil, so that the frying is more uniform, and the frying effect is improved. In the equipment, oil is filled in the exhaust bin 5 and the oil residue bin 12, and half-bin oil is filled in the exhaust bin 5.

By adopting the technical scheme, the fried fruits and vegetables become light and float on the oil, the oil line 6 of the oil is arranged on the frying cylinder 1, the frying cylinder 1 can restrict the fruits and vegetables to be always soaked in the oil, and the frying uniformity and effect are improved. The frying process comprises the following steps: the fried fruit and vegetable slices enter the frying cylinder 1 from the feed hopper 23, are conveyed forward for frying under the action of the conveying helical blades 4 and oil, are fried in the conveying cylinder and then reach the lifting cylinder 7, and are lifted to the discharge hopper 16 through the lifting helical blades 9 in the lifting cylinder 7 for output, namely, the continuous frying is completed.

Wherein, the moisture that produces in the frying process gets into in the exhaust bin 5 through the mesh above the mesh barrel 1b to exhaust bin 5 and lift cylinder 7 intercommunication can discharge the moisture in lift cylinder 7, and discharge by the vacuum unit 18 through gas vent 17 and evacuate. Moisture generated in the frying process enters the exhaust bin 5, so that the frying mass transfer speed of the fruit and vegetable slices is increased.

In the oil draining lifting section, the fruit and vegetable pieces can be subjected to oil draining treatment through the oil draining net 10, so that the oil content of the fried fruit and vegetable pieces is reduced, and the fried fruit and vegetable pieces are healthier to eat. The drained oil is discharged to an oil residue bin 12 through an oil draining bin 11 below the oil draining screen 10.

Fruit vegetables are at the dregs of fat in-process, the flavouring of pickling breaks away from when frying on the fruit vegetables and forms the dregs of fat, the big dregs of fat of proportion deposits the dregs of fat storehouse 12 through the mesh of taking mesh barrel 1b below, the proportion is little along with the fruit vegetables piece moves to lifting cylinder 7, because oil level line 6 is on frying cylinder 1, consequently, lifting cylinder 7's front end also has oil, when lifting fruit vegetables piece, the little dregs of fat of a part proportion can contact with oil drainage net 10, the seepage is in the oil strain storehouse, then deposit and discharge to dregs of fat storehouse 12, the little dregs of fat of another part proportion is along with the fruit vegetables piece is discharged. The oil residue in the oil residue bin 12 can be cleaned once after a period of time by opening the residue discharge port 14.

During oil circulation, an oil inlet of the circulating oil pipe 19 is connected with the bottom of the feeding end of the frying cylinder 1, an oil outlet of the circulating oil pipe is connected with the upper portion of the lifting cylinder 7, so that the conveying directions of oil of the frying cylinder 1 and fruit and vegetable slices are reverse, a preheating section and a frying section are formed in the frying cylinder 1, the fruit and vegetable slices are gradually heated and fried, and oil residues in the oil residue bin 12 can be flushed towards the residue discharge port 14 by the reverse oil. The high-temperature oil circulates in the frying pan 1, the oil circulation pipe 19, and the heating device 21 by the pumping action of the oil pump 20.

In a preferred embodiment of the present invention, the mesh-free cylinder 1a is 1/3-2/5 of the frying cylinder 1, and the meshed cylinder 1b is 3/5-2/3 of the frying cylinder 1.

Further, a slag discharge port 14 is formed in the oil residue bin 12 close to the feeding end of the frying cylinder 1, the bottom of the oil residue bin 12 inclines towards the slag discharge port 14, and a third air seal 13 is installed at the slag discharge port 14. Vacuum frying can be achieved using the first, second and third airlocks 13.

As another important embodiment of this case, as shown in fig. 2 and fig. 3, the bottom of the feed end of the non-mesh cylinder 1a is provided with a filter cylinder 27, one end of the filter cylinder 27 is open, the open end is connected with the circulation pipeline, the other closed end is connected with the non-mesh cylinder 1a, and the upper generatrix of the filter cylinder 27 is flush with the bottom of the frying cylinder 1; the mounting structure of the filter cartridge 27 can circulate not only the oil in the frying drum 1 but also the oil in the oil residue storage 12. Specifically, a plurality of oil inlets 27a are formed on the surface of the filter cartridge 27, and the oil inlets 27a are tapered with a narrow outside and a wide inside and protrude from the surface of the cylinder of the filter cartridge 27, so that the surface of the cylinder of the filter cartridge 27 has a structure with uneven height. These rugged tapered oil feed holes 27a reduce the adhesion area of the oil sludge, weakening the adhesion of the oil sludge. Under the flowing action of oil, the oil residue on the conical oil inlet hole 27a is moved away from the conical oil inlet hole 27a, and the oil inlet of the filter cylinder 27 is not influenced.

Carry helical blade 4 and promote helical blade 9 and all set up leading wheel 25 near the position of universal joint shaft coupling 26, leading wheel 25 installs at helical blade's border and carries a section of thick bamboo or promote a section of thick bamboo 7 contact, leading wheel 25 can support the transmission shaft tip near universal joint shaft coupling 26, and at the rotatory in-process of helical blade, leading wheel 25 and barrel inner wall rolling contact improve the stability of motion.

Preferably, the oil level line 6 in the lifting cylinder 7 is from 1/2 to 2/3 of the oil draining net 10. The oil pump 20 is arranged close to an oil inlet of the circulating oil pipe 19, and the heating device 21 is arranged close to an oil outlet of the circulating oil pipe 19. The oil is lost in the frying process, and the oil supplementing pipe 22 is connected to the position of the lower charging barrel, so that the oil level line 6 of the oil is always higher than the frying barrel 1.

The frying process goes through the processes of preheating, frying and lifting oil draining, and continuous vacuum frying can be realized.

In this application 1, under the pumping action of the oil pump 20, the high-temperature oil circulates in the frying drum 1, the circulating oil pipe 19 and the heating device 21. The temperature of the oil can be maintained and the oil is filtered and circulated. The heat energy of the continuous vacuum frying oil has high heat efficiency, the oil heat energy is only energy consumption required by water evaporation during fruit and vegetable frying, and other heat energy consumption is not available.

2 the direction of oil in the frying cylinder 1 is reverse to the direction of conveying the fruit and vegetable pieces through the drainage of meshes on the spiral blades, and a preheating section and a frying section are formed in the frying cylinder 1, so that the fruit and vegetable pieces are gradually heated and fried.

3. Fruit vegetables piece in the fry tube 1 is forward under helical blade's the rotatory effect that promotes, and water, oil, steam can pass the mesh reverse flow on the helical blade, and the mesh on the helical blade has carried out the diversion drainage to oil or water against the current, has satisfied the physical requirement that oil reverse flow flows.

4. Moisture generated in the frying process enters the exhaust bin 5, so that the frying mass transfer speed of the fruit and vegetable slices is increased.

5. The conduction oil is owing to contain dregs of fat and product bits end, and this application technical scheme can the synchronous edulcoration recycle, and cartridge filter 27 leans on oil flow to erode, reaches the effect of automatically cleaning.

6. The frying time is simply set and is controlled by the rotating speed of the conveying helical blade 4.

7. The drained oil is discharged to an oil residue bin 12 through an oil draining bin 11 below the oil draining net 10, and the drained oil is directly and synchronously utilized, so that the oil supplement is reduced.

8. The oil on the surface of the product after vacuum frying can be simultaneously drained, and the oil content of the product is low.

9. Guide wheels 25 are arranged at the positions of the conveying spiral blade 4 and the lifting spiral blade 9 close to the universal joint coupler 26, and the guide wheels 25 are installed at the edges of the spiral blades and are in contact with the conveying cylinder or the lifting cylinder 7.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The continuity vacuum frying device convenient to conduction oil reverse flow, its characterized in that: comprises a frying section, a lifting oil draining section, an oil circulating system and a vacuum unit;

the deep-frying section comprises a deep-frying cylinder, an exhaust bin and an oil residue bin, the front section of the deep-frying cylinder is a non-mesh cylinder, the rear section of the deep-frying cylinder is a mesh-equipped cylinder, and the non-mesh cylinder and the mesh-equipped cylinder are connected into a whole; a first transmission shaft is arranged in the frying cylinder, a conveying helical blade is arranged on the first transmission shaft, the first transmission shaft extends to the outside of the frying cylinder and is connected with a motor, a feed hopper is arranged above the non-mesh cylinder and is connected with the non-mesh cylinder through a feed barrel, a first air seal device is arranged on the feed barrel, the oil residue bin is wrapped and arranged below the frying cylinder, and the exhaust bin is arranged above the mesh cylinder; the conveying helical blade on the first transmission shaft in the frying cylinder is made of a mesh plate, the mesh hole on the helical blade can dredge and guide the flow of the counter-flow oil, and the conveying power of the counter-flow oil is not large;

2. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: the mesh-free barrel is 1/3-2/5 of a frying barrel, and the mesh-containing barrel is 3/5-2/3 of the frying barrel.

3. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: the deep-fry section of thick bamboo is provided with the cinder notch in the feed end that is close to of cinder storehouse, the bottom in cinder storehouse is to the cinder notch slope, just the third air seal is installed to the cinder notch.

4. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: the positions of the conveying helical blade and the lifting helical blade, which are close to the universal joint coupler, are provided with guide wheels, and the guide wheels are installed on the edges of the helical blades and are in contact with the conveying cylinder or the lifting cylinder.

5. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: the oil level in the lifting cylinder reaches 1/2-2/3 of the oil draining net.

6. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: the oil pump is arranged close to an oil inlet of the circulating oil pipe, and the heating device is arranged close to an oil outlet of the circulating oil pipe.

7. The continuous vacuum frying apparatus for facilitating reverse flow of heat transfer oil according to claim 1, wherein: and the position of the feeding barrel is also connected with an oil supplementing pipe.