CN102697154A - Fruit/vegetable drying device and working method thereof - Google Patents

Fruit/vegetable drying device and working method thereof Download PDF

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Publication number
CN102697154A
CN102697154A CN2012102341020A CN201210234102A CN102697154A CN 102697154 A CN102697154 A CN 102697154A CN 2012102341020 A CN2012102341020 A CN 2012102341020A CN 201210234102 A CN201210234102 A CN 201210234102A CN 102697154 A CN102697154 A CN 102697154A
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CN
China
Prior art keywords
air
ventilating opening
fruit
circulating fan
plate
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Pending
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CN2012102341020A
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Chinese (zh)
Inventor
谢宜超
赵康伟
陈娟
吴正祥
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YANGZHOU FUERXI FRUIT VEGETABLE JUICE MACHINERY CO Ltd
Original Assignee
YANGZHOU FUERXI FRUIT VEGETABLE JUICE MACHINERY CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by YANGZHOU FUERXI FRUIT VEGETABLE JUICE MACHINERY CO Ltd filed Critical YANGZHOU FUERXI FRUIT VEGETABLE JUICE MACHINERY CO Ltd
Priority to CN2012102341020A priority Critical patent/CN102697154A/en
Publication of CN102697154A publication Critical patent/CN102697154A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a fruit/vegetable drying device and a working method thereof. With the fruit/vegetable drying device and the working method thereof, more fruit/vegetable windswept area is provided, the drying effect is better, the temperature at a baking area is uniform, and temperature jump can be avoided during the humidity elimination, so that the product quality is ensured. The fruit/vegetable drying device comprises a box body and a bidirectional circular drying system, wherein a baking area and a heating area are formed in the box body; a separation plate is arranged between the baking area and the heating area; an upper air vent is arranged at the top of the separation plate and a lower air vent is arranged at the bottom; a heating device and an air feeding device are arranged in the heating area; the bidirectional circular drying system comprises a counter-rotation circulating fan which is arranged in the heating area and located above the heating device; and the upper air vent, the counter-rotation circulating fan, the heating device and the lower air vent are communicated in sequence. The fruit/vegetable drying device provided by the invention is capable of ensuring that the temperature at each point in the baking area is more even.

Description

A kind of fruit and vegetable drying device and method of work thereof
Technical field
The present invention relates to the fruit-vegetable food manufacture field, relate in particular to fruit and vegetable drying device and method of work thereof.
Background technology
The fruit and vegetable drying technology improves the additional output value of agricultural product for deep processing of farm products, has great importance.Along with social progress; Living standards of the people improve constantly; People require increasingly highly to drying fruits and vegetables, and for garden stuff processing enterprise, these technical barriers fail effectively to be solved always; Be difficult to simultaneously buy and dry by the fire high-quality dry fruit, efficient height, and can save the equipment of artificial and fuel again.
The static oven dry of existing fruits and vegetables mainly comprises oven dry of earth kiln formula and the oven dry of color steel drying room.Though earth kiln formula oven dry cost of investment is little, but its sanitary condition is poor, the internal temperature heterogeneity, labour intensity is big, and overdrying or wet excessively phenomenon appear in the lack of homogeneity of oven dry product easily, can't reach the food hygiene requirement.
Color steel drying room more native drying room on sanitary condition has bigger improvement, but needs manual work to turn in its drying course, the internal temperature heterogeneity; Sudden change (temperature curve concussion) can appear in temperature during hydrofuge, and is as shown in Figure 7, causes drying the lack of homogeneity of product; Make the agricultural product inner vein change; Very easily produce wrinkling phenomenon (like red date, matrimony vine etc.), had a strong impact on the outward appearance of agricultural product, directly influenced economic benefit.
The disclosed CN101822409A of the 2010.9.8. of State Intellectual Property Office; Title " a kind of circulating fruit and vegetable drying box " with heat-exchange device; A kind of device with hot zone, hyperthermia drying district, low temperature hydrofuge district and Automatic Cycle fruits and vegetables frame is disclosed; The hot blast that utilizes combustion furnace to produce is dried the fruits and vegetables on the Automatic Cycle frame in the casing.Although this case can realize the automation fruit and vegetable drying, the fruits and vegetables on the Automatic Cycle frame " not turn-over " are still the single face wind-engaging, the oven dry result badly; Temperature jump problem when in addition, this case fails to solve hydrofuge.
Summary of the invention
The present invention is directed to above problem, provide a kind of fruits and vegetables wind surface more, make drying effect better, the baking zone temperature is even, and appearance temperature sudden change can avoid hydrofuge the time, and then guarantees the fruit and vegetable drying device and the method for work thereof of product quality.
Technical scheme of the present invention is: comprise envelope, be provided with the baking zone and the thermal treatment zone in the said envelope, be provided with dividing plate between the said baking zone and the thermal treatment zone, the top of said dividing plate is provided with ventilating opening, the bottom is provided with down ventilating opening; In the said thermal treatment zone, be provided with heater and air compensation device,
Also comprise two-way circulation drying system, said two-way circulation drying system comprises the rotating circulating fan, and said rotating circulating fan is located in the said thermal treatment zone, be positioned at the top of said heater;
Said ventilating opening, rotating circulating fan, heater and the following ventilating opening gone up is interconnected successively.
Said air compensation device comprises mends wind blower fan and secondary air channel; Said secondary air channel comprises the blast pipe that is interconnected, goes up secondary air channel and play secondary air channel, and the said secondary air channel of going up is communicated with between said rotating circulating fan and last ventilating opening, and the connection of said secondary air channel down is between said heater and following ventilating opening;
Be respectively equipped with in the outlet of secondary air channel and play secondary air channel on said and mend air-valve one and benefit air-valve two.
In said baking zone, also be provided with even wind system, said even wind system comprises air uniform plate and deflector, on said air uniform plate, offers some passages;
Said air uniform plate comprises air uniform plate and following air uniform plate, and said deflector comprises baffle upper plate and chin spoiler,
Said baffle upper plate is actively installed on the said ventilating opening outside of going up,
Said chin spoiler is actively installed on the said ventilating opening down outside;
The said air uniform plate of going up fixedly is located at the top in the said baking zone, and leaves the gap between the top board of said baking zone,
Said air uniform plate down fixedly is located at the bottom in the said baking zone, and leaves the gap between the base plate of said baking zone.
The diameter of said passage is pressed and the said distance that goes up between ventilating opening, the following ventilating opening, increases progressively on year-on-year basis.
Also comprise adjustable plate, said adjustable plate is actively installed near said ventilating opening place down.
Also comprise air-introduced machine, said air-introduced machine connects said heater.
In said baking zone, also be provided with humidity-discharging device, said humidity-discharging device comprises dehumidification tube and wet-emitting blower, and said dehumidification tube is arranged on the baffle surface of said baking zone.
Also comprise frequency converter, said benefit wind blower fan is connected said frequency converter respectively with wet-emitting blower.
Also comprise humidity sensor, temperature sensor and controller, said humidity sensor is connected said controller with temperature sensor, and said controller connects said frequency converter and air-introduced machine.
Method of work of the present invention is carried out: carry out according to the following steps: the alternate-running time of setting said rotating circulating fan according to the following steps;
1), screen cloth toasted material send into envelope, close envelope; Start heater and rotating circulating fan; Control the counter-rotating of said rotating circulating fan, the said thermal treatment zone and baking zone formation circulating fan-on ventilating opening-baffle upper plate-on the clockwise circulated air of air uniform plate-material-following air uniform plate-chin spoiler-following ventilating opening-heater;
2), said clockwise circulated air work to the alternately time of setting, control said rotating circulating fan automatically and just change, form counterclockwise circulated air in the said thermal treatment zone and baking zone; Subsequently according to the setting-up time alternate run;
3), in the running, controller is regulated heater according to temperature controller, the control temperature adheres to specification;
4), reach when setting hydrofuge humidity, according to turning to of said rotating circulating fan by following two kinds of situation startup air compensation device;
A), under the clockwise operating condition of said rotating circulating fan, need hydrofuge, when mending wind, mend air-valve two and open, mend air-valve one and close, said benefit wind blower fan and wet-emitting blower are opened simultaneously;
B), under the counterclockwise operating condition of said rotating circulating fan, need hydrofuge, when mending wind, mend air-valve two and close, mend air-valve one and open, said benefit wind blower fan and wet-emitting blower are opened simultaneously;
Hydrofuge to humidity is when setting value is following, and said benefit wind blower fan and wet-emitting blower are closed, and said rotating circulating fan is proceeded alternate run;
5), reach the aridity requirement, finish until said material.
Fruit and vegetable drying device of the present invention comprises two-way cyclic control system, alternately carries out clockwise at baking zone, the counterclockwise hot air circulation of both direction, just makes the positive and negative of fruits and vegetables all can contact hot blast; Because the change of wind direction combines this case to spare wind system in addition, can make that the temperature of the interior each point of baking zone is more even simultaneously.
When reaching the hydrofuge humidity of setting in the baking zone, if the rotating circulating fan just changes, mend air-valve one and open automatically, to mend wind blower fan and wet-emitting blower and open simultaneously, endless form is shown in Fig. 5 arrow; If the counter-rotating of rotating circulating fan is mended air-valve two and is opened automatically, mend air-valve one and close, to mend wind blower fan and wet-emitting blower and open simultaneously, endless form is shown in Fig. 1 arrow.Hydrofuge to humidity reaches setting value when following, mends wind blower fan, wet-emitting blower, benefit air-valve one and mends air-valve two and close, and the rotating of rotating circulating fan is oven dry alternately.Repeat this process, finally reach the oven dry terminal point, make that the drying product quality of bake region front and back position and upper-lower position is consistent.
Mend wind blower fan and wet-emitting blower by same Frequency Converter Control; The scalable frequency converter frequency reach at a slow speed hydrofuge (what is called at a slow speed: promptly the hydrofuge air quantity with mend the wind air quantity synchronously, with little air quantity starting; Guarantee under the substantially invariable situation of temperature; Progressively increase to mend air quantity and hydrofuge amount) effect, prevent the contraction distortion that fruit and vegetable food causes because of temperature jump.
The present invention has finally realized under temperature constant state, fruits and vegetables being carried out omnibearing oven dry, can obtain ideal oven dry curve as shown in Figure 6.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the vertical view of Fig. 1,
Fig. 3 is the left view of Fig. 1,
Fig. 4 is the cutaway view of A-A face among Fig. 1,
Fig. 5 is second kind of circulation heating line of the present invention,
Fig. 6 is time/temperature among the present invention (t-T) curve map,
Fig. 7 is time/temperature in the prior art (t-T) curve map;
1 is baking zone among the figure, the 10th, and dividing plate, the 101st, last ventilating opening, the 102nd, following ventilating opening, the 2nd, the thermal treatment zone, the 21st, rotating circulating fan; The 22nd, coal furnace, the 23rd, heat-exchanger rig, the 24th, last air uniform plate, the 240th, passage, the 25th, following air uniform plate, the 26th, baffle upper plate; The 27th, chin spoiler, the 28th, adjustable plate, the 31st, mend the wind blower fan, the 32nd, mend air-valve one, 33rd, mend air-valve two, 34th, secondary air channel; The 41st, wet-emitting blower, the 42nd, dehumidification tube, the 43rd, hydrofuge valve, the 5th, air-introduced machine, the 6th, chimney;
Arrow is represented the circulated air route among the figure.
The specific embodiment
The present invention comprises envelope shown in Fig. 1-5, be provided with the baking zone 1 and the thermal treatment zone 2 in the said envelope, is provided with dividing plate 10 between the said baking zone 1 and the thermal treatment zone 2, and the top of said dividing plate 10 is provided with ventilating opening 101, the bottom is provided with down ventilating opening 102; In the said thermal treatment zone 2, be provided with heater and air compensation device;
Said heater comprises coal furnace 22 and heat-exchanger rig 23; Said heat-exchanger rig 23 comprises and turns to spiral helicine tracheae; Said heat-exchanger rig 23 is located at the top of coal furnace 22, the top outlet of connection coal furnace 22; Also comprise chimney 6, said chimney 6 is communicated with said heat-exchanger rig 23 through smoke exhaust pipe;
Also comprise two-way circulation drying system, said two-way circulation drying system comprises rotating circulating fan 21, and said rotating circulating fan 21 is located in the said thermal treatment zone 2, be positioned at the top of said heater;
Said ventilating opening 101, rotating circulating fan 21, heater and the following ventilating opening 102 gone up is interconnected successively.(, therefore repeat no more in view of the heater of gas belongs to techniques well known here; Those skilled in the art can form forward and reverse active air channel after can confirming that according to aforementioned statement upward ventilating opening 101, rotating circulating fan 21, heater and following ventilating opening 102 are interconnected successively.)
Said air compensation device comprises mends wind blower fan 31 and secondary air channel 34; Said secondary air channel 34 comprises the blast pipe that is interconnected, goes up secondary air channel and play secondary air channel, and the said secondary air channel of going up is communicated with between said rotating circulating fan 21 and last ventilating opening 101, and the connection of said secondary air channel down is between said heater and following ventilating opening 102;
Be respectively equipped with in the outlet of secondary air channel and play secondary air channel on said and mend air-valve 1 and benefit air-valve 2 33.
In said baking zone 1, also be provided with even wind system, said even wind system comprises air uniform plate and deflector, on said air uniform plate, offers some passages 240;
Said air uniform plate comprises air uniform plate 24 and following air uniform plate 25, and said deflector comprises baffle upper plate 26 and chin spoiler 27,
Said baffle upper plate 26 is actively installed on said ventilating opening 101 outsides of going up,
Said chin spoiler 27 is actively installed on said ventilating opening 102 outsides down;
The said air uniform plate 24 of going up fixedly is located at the top in the said baking zone 1, and leaves the gap between the top board of said baking zone 1,
Said air uniform plate 25 down fixedly is located at the bottom in the said baking zone 1, and leaves the gap between the base plate of said baking zone 1.
The diameter of said passage 240 is pressed and the said distance that goes up between ventilating opening 101, the following ventilating opening 102, increases progressively on year-on-year basis.
Also comprise adjustable plate 28, said adjustable plate 28 is actively installed near said ventilating opening 102 places down.
Even wind system is made up of deflector and air uniform plate respectively, its deflector adjustable angle, and the air uniform plate percent opening becomes big with certain proportion by nearly air port to air port far away direction successively, guarantees that the temperature before and after the bake region is consistent; Following ventilating opening 102 places are provided with movable regulating plate 28, and the incoming air area of adjusting air inlet capable of being combined reaches best air intake effect, realize the unanimity of bulk temperature in the baking zone 1.
Also comprise air-introduced machine 5, said air-introduced machine 5 connects said heater, promptly connects smoke exhaust pipe; When hydrofuge was mended wind, air-introduced machine 5 can be opened, and increased heat, guaranteed that temperature is basicly stable in the baking zone 1.
In said baking zone 1, also be provided with humidity-discharging device, said humidity-discharging device comprises dehumidification tube 42 and wet-emitting blower 41, and said dehumidification tube 42 is arranged on dividing plate 10 surfaces of said baking zone 1.On dehumidification tube 42, also be provided with hydrofuge valve 43, regulate the hydrofuge amount.
Also comprise frequency converter, said benefit wind blower fan 31 is connected said frequency converter and air-introduced machine respectively with wet-emitting blower 41.
Also comprise humidity sensor and controller, said humidity sensor connects said controller, and said controller connects said frequency converter.
Carry out according to the following steps: carry out according to the following steps: the alternate-running time of setting said rotating circulating fan; Such as just change, reversing time is set at 1-30 minute respectively;
1), screen cloth toasted material send into envelope, close envelope; Start heater and rotating circulating fan 21; Control said rotating circulating fan 21 counter-rotatings, the clockwise circulated air of ventilating opening 102-heater under air uniform plate 24-material-following air uniform plate 25-chin spoiler 27-on the ventilating opening 101-baffle upper plate 26-on the said thermal treatment zone 2 and the baking zone 1 formation circulating fan 21-;
2), after alternately time of setting of said clockwise circulated air work, control said rotating circulating fan 21 automatically and just changeing, form counterclockwise circulated air with baking zone 1 in the said thermal treatment zone 2; Subsequently according to the setting-up time alternate run;
3), in the running, controller is regulated heater according to temperature controller, the control temperature adheres to specification;
4), reach when setting hydrofuge humidity, according to turning to of said rotating circulating fan 21 by following two kinds of situation startup air compensation device;
A), under the said rotating circulating fan 21 clockwise operating conditions, need hydrofuge, when mending wind, mend air-valve 2 33 and open, mend air-valve 1 and close, said benefit wind blower fan 31 is opened with wet-emitting blower 41 simultaneously;
B), under the said rotating circulating fan 21 counterclockwise operating conditions, need hydrofuge, when mending wind, mend air-valve 2 33 and close, mend air-valve 1 and open, said benefit wind blower fan 31 is opened with wet-emitting blower 41 simultaneously;
Hydrofuge to humidity is when setting value is following, and said benefit wind blower fan 31 cuts out with wet-emitting blower 41, and said rotating circulating fan 21 is proceeded alternate run;
5), reach the aridity requirement, finish until said material.

Claims (10)

1. a fruit and vegetable drying device comprises envelope, is provided with the baking zone and the thermal treatment zone in the said envelope, is provided with dividing plate between the said baking zone and the thermal treatment zone, and the top of said dividing plate is provided with ventilating opening, the bottom is provided with down ventilating opening; In the said thermal treatment zone, be provided with heater and air compensation device,
It is characterized in that, also comprise two-way circulation drying system, said two-way circulation drying system comprises the rotating circulating fan, and said rotating circulating fan is located in the said thermal treatment zone, be positioned at the top of said heater;
Said ventilating opening, rotating circulating fan, heater and the following ventilating opening gone up is interconnected successively.
2. a kind of fruit and vegetable drying device according to claim 1 is characterized in that, said air compensation device comprises mends wind blower fan and secondary air channel; Said secondary air channel comprises the blast pipe that is interconnected, goes up secondary air channel and play secondary air channel, and the said secondary air channel of going up is communicated with between said rotating circulating fan and last ventilating opening, and the connection of said secondary air channel down is between said heater and following ventilating opening;
Be respectively equipped with in the outlet of secondary air channel and play secondary air channel on said and mend air-valve one and benefit air-valve two.
3. a kind of fruit and vegetable drying device according to claim 1 is characterized in that, in said baking zone, also is provided with even wind system, and said even wind system comprises air uniform plate and deflector, on said air uniform plate, offers some passages;
Said air uniform plate comprises air uniform plate and following air uniform plate, and said deflector comprises baffle upper plate and chin spoiler,
Said baffle upper plate is actively installed on the said ventilating opening outside of going up,
Said chin spoiler is actively installed on the said ventilating opening down outside;
The said air uniform plate of going up fixedly is located at the top in the said baking zone, and leaves the gap between the top board of said baking zone,
Said air uniform plate down fixedly is located at the bottom in the said baking zone, and leaves the gap between the base plate of said baking zone.
4. a kind of fruit and vegetable drying device according to claim 3 is characterized in that, the diameter of said passage is pressed and the said distance that goes up between ventilating opening, the following ventilating opening, increases progressively on year-on-year basis.
5. a kind of fruit and vegetable drying device according to claim 1 is characterized in that, also comprises adjustable plate, and said adjustable plate is actively installed near said ventilating opening place down.
6. a kind of fruit and vegetable drying device according to claim 1 is characterized in that also comprise air-introduced machine, said air-introduced machine connects said heater.
7. a kind of fruit and vegetable drying device according to claim 1 is characterized in that, in said baking zone, also is provided with humidity-discharging device, and said humidity-discharging device comprises dehumidification tube and wet-emitting blower, and said dehumidification tube is arranged on the baffle surface of said baking zone.
8. a kind of fruit and vegetable drying device according to claim 1 is characterized in that, also comprises frequency converter, and said benefit wind blower fan is connected said frequency converter respectively with wet-emitting blower.
9. a kind of fruit and vegetable drying device according to claim 8; It is characterized in that; Also comprise humidity sensor, temperature sensor and controller, said humidity sensor is connected said controller with temperature sensor, and said controller connects said frequency converter and air-introduced machine.
10. the method for work of the said fruit and vegetable drying device of claim 1 is characterized in that, carries out according to the following steps: the alternate-running time of setting said rotating circulating fan;
1), screen cloth toasted material send into envelope, close envelope; Start heater and rotating circulating fan; Control the counter-rotating of said rotating circulating fan, the said thermal treatment zone and baking zone formation circulating fan-on ventilating opening-baffle upper plate-on the clockwise circulated air of air uniform plate-material-following air uniform plate-chin spoiler-following ventilating opening-heater;
2), said clockwise circulated air work to the alternately time of setting, control said rotating circulating fan automatically and just change, form counterclockwise circulated air in the said thermal treatment zone and baking zone; Subsequently according to the setting-up time alternate run;
3), in the running, controller is regulated heater according to temperature controller, the control temperature adheres to specification;
4), reach when setting hydrofuge humidity, according to turning to of said rotating circulating fan by following two kinds of situation startup air compensation device;
A), under the clockwise operating condition of said rotating circulating fan, need hydrofuge, when mending wind, mend air-valve two and open, mend air-valve one and close, said benefit wind blower fan and wet-emitting blower are opened simultaneously;
B), under the counterclockwise operating condition of said rotating circulating fan, need hydrofuge, when mending wind, mend air-valve two and close, mend air-valve one and open, said benefit wind blower fan and wet-emitting blower are opened simultaneously;
Hydrofuge to humidity is when setting value is following, and said benefit wind blower fan and wet-emitting blower are closed, and said rotating circulating fan is proceeded alternate run;
5), reach the aridity requirement, finish until said material.
CN2012102341020A 2012-07-06 2012-07-06 Fruit/vegetable drying device and working method thereof Pending CN102697154A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103202520A (en) * 2013-04-28 2013-07-17 南京师范大学 Edible fungus dried air circulation treatment device
CN103340471A (en) * 2013-07-25 2013-10-09 扬州福尔喜果蔬汁机械有限公司 Dryer for fruits and vegetables and processing method thereof
CN103344104A (en) * 2013-07-19 2013-10-09 万能亿自动化科技(苏州)有限公司 Drying room with adjustable hot air path
CN103988890A (en) * 2014-04-28 2014-08-20 长沙隆平有机农业有限公司 Drying method of organic edible flower
CN105180631A (en) * 2015-09-17 2015-12-23 杨凌博通农业装备科技有限公司 Connected steam drying house
CN105639681A (en) * 2016-02-03 2016-06-08 昆明农沃新能源科技有限公司 Combined heat source type fruit and vegetable drying machine and processing method thereof
CN105661586A (en) * 2016-02-16 2016-06-15 陕西优斯达环境科技有限公司 Fruit/vegetable hot air drying room
CN106839664A (en) * 2016-12-21 2017-06-13 潍坊舜天机电设备有限公司 Double drying tunnel Two-way Cycle dryers and its furnace drying method
CN108278860A (en) * 2018-01-16 2018-07-13 昆明霍尔金科技有限公司 A kind of uniform flow hot air material drying means
CN109770393A (en) * 2018-12-31 2019-05-21 杭州天彩涂装设备有限公司 A kind of internal-circulation type fruit and vegetable drying machine

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CN103202520A (en) * 2013-04-28 2013-07-17 南京师范大学 Edible fungus dried air circulation treatment device
CN103202520B (en) * 2013-04-28 2015-04-08 南京师范大学 Edible fungus dried air circulation treatment device
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CN103340471A (en) * 2013-07-25 2013-10-09 扬州福尔喜果蔬汁机械有限公司 Dryer for fruits and vegetables and processing method thereof
CN103340471B (en) * 2013-07-25 2015-01-21 扬州福尔喜果蔬汁机械有限公司 Dryer for fruits and vegetables and processing method thereof
CN103988890A (en) * 2014-04-28 2014-08-20 长沙隆平有机农业有限公司 Drying method of organic edible flower
CN103988890B (en) * 2014-04-28 2016-03-16 长沙隆平有机农业有限公司 A kind of furnace drying method of organic edible flower
CN105180631A (en) * 2015-09-17 2015-12-23 杨凌博通农业装备科技有限公司 Connected steam drying house
CN105639681A (en) * 2016-02-03 2016-06-08 昆明农沃新能源科技有限公司 Combined heat source type fruit and vegetable drying machine and processing method thereof
CN105661586A (en) * 2016-02-16 2016-06-15 陕西优斯达环境科技有限公司 Fruit/vegetable hot air drying room
CN106839664A (en) * 2016-12-21 2017-06-13 潍坊舜天机电设备有限公司 Double drying tunnel Two-way Cycle dryers and its furnace drying method
CN108278860A (en) * 2018-01-16 2018-07-13 昆明霍尔金科技有限公司 A kind of uniform flow hot air material drying means
CN108278860B (en) * 2018-01-16 2020-06-19 昆明霍尔金科技有限公司 Uniform-flow hot air material drying method
CN109770393A (en) * 2018-12-31 2019-05-21 杭州天彩涂装设备有限公司 A kind of internal-circulation type fruit and vegetable drying machine

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