CN102871201A - Drying device suitable for food and food drying method thereof - Google Patents
Drying device suitable for food and food drying method thereof Download PDFInfo
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- CN102871201A CN102871201A CN2011101979059A CN201110197905A CN102871201A CN 102871201 A CN102871201 A CN 102871201A CN 2011101979059 A CN2011101979059 A CN 2011101979059A CN 201110197905 A CN201110197905 A CN 201110197905A CN 102871201 A CN102871201 A CN 102871201A
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Abstract
The invention belongs to a drying device suitable for food. The device comprises a drying chamber, a rotating wheel dehumidification system, a refrigerating system, a heater, a humidifier, a circulating air supply system, a main air path and a control system. The drying chamber, a refrigerating system evaporator, the heater, the humidifier, and a circulating fan are connected by air pipes in order so as to form the main air path. The rotating wheel dehumidification system and the main air path are in parallel connection. A food drying method of the drying device provided in the invention consists of: according to a drying curve and a drying rate curve, adjusting the drying chamber temperature, the relative humidity and the air speed, and comparing an actual water content with a product water content to determine whether ending the drying process. Heating dehumidification, evaporator dewing dehumidification, and adsorbing dehumidification by a rotating wheel dehumidifier are employed to realize drying chamber humidity control. The device has the characteristics of wide temperature and humidity control range, good uniformity, and adjustable air speed, can monitor the weight of a dried material in real time, control the drying process, lower energy consumption, and can be used for drying fruits and vegetables, spices, fish, meat, egg products, gel products or/and cereals.
Description
Technical field
The present invention is specifically related to a kind of method that is applicable to device and the dried foods thereof of food drying.Be applicable to various fruits and vegetables, condiment, fish, meat, egg products, gel product or/and the drying of cereal.
Background technology
Heated-air drying is widely used in the fields such as chemical industry, food, light industry, weaving, coal, agriculture and forestry product processing and building materials.The development of China's drying equipment is evening, mainly begins from the drying machine of introducing the countries such as imitated Japan, the former Soviet Union, develops so far, has obtained larger breakthrough.Introduce the controlled drying machine of a kind of multisection type humiture such as China Patent Publication No. CN201365487Y, utilized heater and humidifier to realize the control of humiture.Patent publication No. CN101191697A has introduced a kind of low temperature drying system arrangement, utilizes the servicing units such as preheating hydrofuge and cooling to realize the relative humidity of the dry room air of fast reducing.Patent publication No. CN201187937 has introduced a kind of refrigeration type constant temperature drying box, utilizes evaporimeter dehumidifying and cooling, utilizes the cold of heater balancing evaporator to reach thermostatically controlled purpose.Patent publication No. CN102016431A has introduced a kind of dehydrating unit and method, utilizes three coil pipes that link to each other with cooling fluid to realize dehumidifying and temperature controlled purpose.Common characteristics of above-mentioned each drying equipment or device are exactly that the dehumanization method that adopts is relatively single, and can not control dry run.Patent publication No. CN101909723A has introduced a kind of dehydrating unit, utilize refrigerating evaporator and desiccant wheel to improve the dehumidifying effect of this device, it is air dried that but this device just is used for realizing, is not used for dry goods, also do not possess the function of control dry run.
Patent publication No. CN1530621A has introduced a kind of drying equipment and method, utilize resistance or heating using microwave to come dry goods, utilize humidity sensor and weight sensor to measure dehumidifying humidity and the weight of dry goods, compare with predetermined data, and control the drying time of article on the basis of comparative result.But the method can only be adjusted drying time according to weight and the humidity of article, the parameters such as humiture that can not adjust dry run according to degree of drying and the rate of drying of article.This patent documentation is to also being inadequate to the open of the other technologies details of implementing this invention, and those skilled in the art can't realize this invention and reach this according to the document inventing described effect.The parameters such as the temperature that in fact, needs to adjust dry run according to degree of drying and the rate of drying of material in the dry run of a lot of materials, humidity are to guarantee the dry mass of material.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect that prior art exists, a kind of device and dried foods method thereof that is applicable to food drying is provided, and this device and method can be used in various fruits and vegetables, condiment, fish, meat, egg products, gel product or/and the drying of cereal.
The object of the present invention is achieved like this:
The present invention will heat wet down, the dehumidifying of refrigerating evaporator dewfall and three kinds of methods of rotary dehumidifier adsorption and dehumidification combine, utilize Temperature Humidity Sensor, air velocity transducer and weight sensor detect the temperature in the hothouse, humidity, the weight of wind speed and dry goods, by the control dehumidification system for runner, refrigeration system, heater and humidifier are realized the accurate control to the temperature and humidity in the hothouse, the rotating speed of controlling blower fan by frequency converter is realized the control of dry indoor air velocity, according to dried material given in advance (various fruits and vegetables for example, condiment, fish, meat, egg products, gel product is or/and foodstuffs such as cereal, lower with) initial water content and the data such as weight of the dried material that detects in real time draw drying curve, and adjust the temperature of hothouse according to drying curve, thereby humidity and wind speed reach the purpose of the dry run of control foodstuff.
Specifically, technical scheme of the present invention is as follows:
A kind of drying device that is applicable to food, it comprises hothouse (200), dehumidification system for runner (300), refrigeration system (400), heater (500), humidifier (600), circulation supply air system (700), main air road (800) and control system (900);
Hothouse (200), refrigeration system evaporator (422), heater (500), humidifier (600), circulation supply air system (700) are connected to form main air road (800) by airduct successively;
Dehumidification system for runner (300) is connected in parallel with main air road (800);
Circulation supply air system (700) comprises circulating fan (710) and variable-frequency governor (720), and described circulating fan is connected successively with variable-frequency governor.
Described hothouse (200) comprises casing (210), weighing tray (220) and weighing tray support (230);
Described casing (210) bottom has 4 holes, and 4 supports (230) of 4 weight sensors (933) and weighing tray (220) are installed respectively, and air uniform plate (240) is equipped with in casing (210) both sides;
Described casing (210) top has 2 holes, and Temperature Humidity Sensor (931) and air velocity transducer (932) are installed respectively.
Described dehumidification system for runner (300) comprises filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier (330) and electromagnetic air valve (341,342);
Filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier are connected by airduct successively with electromagnetic air valve (341,342), are parallel on the main air road again.
Described refrigeration system (400) comprises a compressor (410), two evaporimeters (421,422), a condenser (430) and three magnetic valves (441,442,443), described evaporimeter (421,422) is connected with compressor (410) by magnetic valve (441,442) respectively, and condenser (430) directly is connected with compressor (410).Described evaporimeter (421) is installed in the dehumidification system for runner, and evaporimeter (422) is installed in the main air road (800), and condenser is installed on outside the drying device casing.
Described control system (900) comprises computer (910), controller (920), signal detection module (930) and relay-contactor control system (940);
Computer (910), controller (920), signal detection module (930) are connected 940 with relay-contactor control system) connect successively;
Described signal detection module (930) comprises Temperature Humidity Sensor (931), air velocity transducer (932), weight sensor (933); Temperature Humidity Sensor (931), air velocity transducer (932) are connected 933 with weight sensor) be connected with controller (920) respectively;
Described Temperature Humidity Sensor (931) and air velocity transducer (932) are installed in the hothouse (200), and weight sensor (933) is installed on hothouse (200) bottom.
Use the method for said apparatus dried foods, its step is as follows:
(1) food to be dried is placed hothouse;
(2) reference temperature, relative humidity, the wind speed of setting dry run, material initial water content and product water content;
(3) real-time sense weight, temperature, relative humidity, wind speed calculate water content, and draw the response curve of drying curve, curve of drying speed, temperature, relative humidity and wind speed;
(4) according to the feature of drying curve and curve of drying speed, adjust hothouse temperature, relative humidity and wind speed;
(5) water content with actual water content and product compares, and determines whether to finish dry run by controller (920);
(6) detect hothouse (200) interior actual temperature and relative humidity with Temperature Humidity Sensor (931), compare with predefined temperature and relative humidity, by the start and stop of controller (920) control heater (500), refrigeration system (400), dehumidification system for runner (300) and humidifier (600), temperature and relative humidity in the control hothouse.
The method of controlling dry indoor relative humidity is as follows: relative humidity is 50% when above, and refrigeration system (400) is started, and utilizes the dehumidifying of evaporimeter (422) dewfall; Relative humidity is 30% when following, and dehumidification system for runner (300) and refrigeration system (400) are started, and the method for utilizing the dehumidifying of adsorption and dehumidification and dewfall to combine dehumidifies; Temperature is more than 60 ℃ the time, starts heater (500) and carries out wet down.
Described food is that various fruits and vegetables, condiment, fish, meat, egg products, gel product are or/and cereal.
Major advantage of the present invention is as follows:
(1) temperature and humidity regulation wide ranges, strong adaptability.The present invention combines the humidity control that the three kinds of methods of adsorption and dehumidification that heat wet down, the dehumidifying of evaporimeter dewfall and rotary dehumidifier realize hothouse, has the Temperature and Humidity Control wide ranges, temperature can be regulated arbitrarily in 5 ℃～80 ℃ scopes, relative humidity can be regulated arbitrarily in 20%～70% scope, the humiture good uniformity, the characteristics such as wind speed is adjustable.
(2) can understand in real time dry dynamic process, realize that degree of drying and dry mass are controlled.Can in dry run, automatically measure the weight of dried material, draw drying curve, and can realize control to dry run to temperature, humidity and the wind speed adjustment of dry run according to the information such as weight of drying curve and dried material, the quality of dried material can be guaranteed, energy consumption can also be reduced simultaneously.
Device of the present invention can be used for various fruits and vegetables, condiment, fish, meat, egg products, gel product or/and the drying of cereal.
Description of drawings
Fig. 1: be drying device structured flowchart of the present invention.
Fig. 2: be this apparatus control system block diagram.
Fig. 3: control flow chart of the present invention.The dotted line frame represents each control module.
Fig. 4: the effect that is wherein embodiment of the present invention.When Temperature Setting is that 80 ℃, relative humidity are set as the humiture response curve in the actual measurement hothouse under 70% the condition, wherein Fig. 4 a is temperature response curve, and Fig. 4 b is the humidity response curve.
Fig. 5: the effect that is wherein embodiment of the present invention.When Temperature Setting is that 5 ℃, relative humidity are set as the humiture response curve in the actual measurement hothouse under 20% the condition, wherein Fig. 5 a is temperature response curve, and Fig. 5 b is the humidity response curve.
Fig. 6: the effect that is wherein embodiment of the present invention.Wind speed response curve in the actual measurement hothouse.
Fig. 7: the effect that is wherein embodiment of the present invention.Fig. 7 a is the drying curve of multitude's beanpod under different condition, and Fig. 7 b is the curve of drying speed of multitude's beanpod under different drying conditions.
Fig. 8: the effect that is wherein embodiment of the present invention.Temperature in the actual measurement hothouse, relative humidity and wind speed control curve.
Respectively number implication in the accompanying drawing as follows:
The 200-hothouse
The 210-casing, 220-weighing tray, 230-weighing tray support, 240-air uniform plate, 201-weight sensor, 202-Temperature Humidity Sensor, 203-air velocity transducer;
The 300-dehumidification system for runner
The 310-filter, 320-blower fan, 330-rotary dehumidifier, 341, the 342-electromagnetic air valve;
The 400-refrigeration system
The 410-compressor, 421, the 422-evaporimeter, 430-condenser, 441,442, the 443-magnetic valve; The 500-heater, 600-humidifier, 710-circulating fan, 720-variable-frequency governor, 800-main air road; The 900-control system
The 910-computer, 920-PLC controller, 930-signal detection module: 931-Temperature Humidity Sensor, 932-air velocity transducer, 933-weight sensor; The 940-relay-contactor control system.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
By Fig. 1-shown in Figure 2, the applicant has designed a kind of drying device that is applicable to food, and it comprises hothouse (200), dehumidification system for runner (300), refrigeration system (400), heater (500), humidifier (600), circulation supply air system (700), main air road (800) and control system (900);
Hothouse (200), refrigeration system evaporator (422), heater (500), humidifier (600), circulation supply air system (700) are connected to form main air road (800) by airduct successively;
Dehumidification system for runner (300) is connected in parallel with main air road (800);
Circulation supply air system (700) comprises circulating fan (710) and variable-frequency governor (720), and described circulating fan is connected successively with variable-frequency governor.
Described hothouse (200) comprises casing (210), weighing tray (220) and weighing tray support (230);
Described casing (210) bottom has 4 holes, and 4 supports (230) of 4 weight sensors (933) and weighing tray (220) are installed respectively, and air uniform plate (240) is equipped with in casing (210) both sides;
Described casing (210) top has 2 holes, and Temperature Humidity Sensor (931) and air velocity transducer (932) are installed respectively.
Described dehumidification system for runner (300) comprises filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier (330) and electromagnetic air valve (341,342);
Filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier are connected by airduct successively with electromagnetic air valve (341,342), are parallel on the main air road again.
Rotary dehumidifier adopts Switzerland to cover special rotary dehumidifier, moisture removal is at normal temperatures greater than 6Kg/h, evaporimeter 421 is for the treatment of the regeneration wind that enters rotary dehumidifier, and to reduce the relative humidity of regeneration wind, electromagnetic air valve is used for cutting off or opening the interface channel on dehumidification system for runner and main air road.
Described refrigeration system (400) comprises a compressor (410), two evaporimeters (421,422), a condenser (430) and three magnetic valves (441,442,443), evaporimeter (421,422) respectively by magnetic valve (441,442) be connected with compressor (410), condenser (430) directly is connected with compressor (410), described evaporimeter (421) is installed in the dehumidification system for runner, evaporimeter (422) is installed in the main air road, and condenser is installed on outside the drying device casing.
Compressor in the present embodiment can adopt the all-sealed compressor of the safe health board 5HP of French imported with original packaging that is purchased, and refrigerant is selected the environmental protection refrigerant, and condenser is the attached heat radiation motor of fin type condenser, and evaporimeter is that fin type multisection type automatic load capacity is adjusted evaporimeter.Magnetic valve (441) is used for connecting the coolant path of evaporimeter (421), when starting synchronously with rotary dehumidifier.Magnetic valve (442) is opened synchronously with compressor, guarantees that compressor works asynchronously with evaporimeter (422).Evaporimeter (422) is used for the wind of major loop is processed, and magnetic valve (443) is only just opened when evaporimeter (422) is defrosted, when magnetic valve 443 is opened, magnetic valve 442 must cut out, when defrosting finished, magnetic valve 443 cut out, and 442 open.
Described control system (900) comprises computer (910), controller (920), signal detection module (930) and relay-contactor control system (940);
Computer (910), controller (920), signal detection module (930) are connected 940 with relay-contactor control system) connect successively;
Described signal detection module (930) comprises Temperature Humidity Sensor (931), air velocity transducer (932), weight sensor (933); Temperature Humidity Sensor (931), air velocity transducer (932) are connected 933 with weight sensor) be connected with controller (920) respectively;
Described Temperature Humidity Sensor (931) and air velocity transducer (932) are installed in the hothouse (200), and weight sensor (933) is installed on hothouse (200) bottom.
The control program of the present embodiment is referring to Fig. 3, and control connection is referring to Fig. 1-Fig. 2.
Controller of the present utility model can be selected the PLC of the Siemens Company that is purchased, model is S7-200 CPU 224 XP, Temperature Humidity Sensor (931) is connected to analog module EM235 with air velocity transducer (932), weight sensor is connected to Weighing module SIWAREX MS, and computer is connected to the COM1 of the RS-485 of PLC by data wire.The switching value output port of PLC connects relay-contactor control system, and PLC realizes that by relay-contactor control system the control to refrigeration system, dehumidification system, heater and humidifier (sees Fig. 1-Fig. 3).
The equipment that provides of applicant or the type selecting of components and parts just illustrate embodiments of the invention in the present embodiment, but are not limited to this.
Utilize the method for embodiment 1 described device dried foods, its step is as follows:
(1) food to be dried is placed hothouse;
(2) reference temperature, relative humidity, the wind speed of setting dry run, material initial water content and product water content;
(3) real-time sense weight, temperature, relative humidity, wind speed calculate water content, and draw the response curve of drying curve, curve of drying speed, humiture and wind speed;
(4) according to the feature of drying curve and curve of drying speed, adjust hothouse temperature, relative humidity and wind speed;
(5) water content with actual water content and product compares, and determines whether to finish dry run by controller (920);
(6) detect hothouse (200) interior actual temperature and relative humidity with Temperature Humidity Sensor (931), compare with predefined temperature and humidity, by the start and stop of controller (920) control heater (500), refrigeration system (400), dehumidification system for runner (300) and humidifier (600), temperature and relative humidity in the control hothouse.
The method of wherein controlling dry indoor humidity is as follows: relative humidity is 50% when above, and refrigeration system (400) is started, and utilizes the dehumidifying of evaporimeter (422) dewfall; Relative humidity is 30% when following, and dehumidification system for runner (300) and refrigeration system (400) are started, and the method for utilizing the dehumidifying of adsorption and dehumidification and dewfall to combine dehumidifies; Temperature is more than 60 ℃ the time, starts heater (500) and carries out wet down.
Described drying curve is the average dry basis moisture content of material and the relation curve of drying time, and its explanation material is in dry run, and average dry basis moisture content is with the relation of variation drying time.Wherein rate of drying refers to the variable quantity of dry basis moisture content in the unit interval.
Computing formula is as follows:
Following water content is dry basis moisture content if no special instructions.
Operation principle of the present invention is as described below:
The drafting of drying curve: weight sensor detects the weight of material, and this weight signal delivered to controller, the weight signal that controller will detect is in real time delivered to computer by data wire, computer is again according to the initial water content of material given in advance, the initial weight of material and the real-time weight of material, calculate water content, the rate of drying of this moment material, draw drying curve.
According to material initial water content X given in advance
0, the material initial weight G that detects of weight sensor
0And t
iMoment weight G
iCalculate t
iMoment water content X
i:
The adjustment principle of drying parameter: according to the drying curve of material, the characteristic of rate curve, adjust baking temperature humidity wind speed.At the early stage of drying because the moisture of material is higher, can use stronger drying condition, as higher temperature and (or) wind speed and (or) lower relative humidity, improving rate of drying, and on the quality impact of dried material not quite.At the later stage of drying, because the moisture of material reduces, material generation shell, be full of cracks, contraction, brown stain, oxidation are breathed out the disadvantageous factor such as changes, nutritional labeling loss and are occured in the dry run, need to be suitable weaken drying condition.
Dry run and result can be stored in the system, for later drying control reference.The constant rate drying period process is longer in some dry rate curves, show that material internal moisture diffusion velocity does not catch up with the surface moisture gasification rate, can by improve temperature or (with) wind speed or (with) method that reduces relative humidity strengthens the drying condition in early stage, improve material internal moisture diffusion velocity, thereby the raising rate of drying reduces the phenomenon of the quality deteriorations such as material contraction, brown stain.The falling rate drying period process is longer in some dry rate curves, or rate of drying is very slow, show that material surface moisture gasification rate is less than the internal moisture diffusion velocity, can by reduce temperature or (with) wind speed or (with) improve the method reduction drying condition of relative humidity, to reduce material surface moisture gasification rate, reduce the phenomenon of the quality deteriorations such as shell, be full of cracks.At the later stage of drying, reach lower level in order to make the final water content of material, be convenient to preservation, and excellent product quality, temperature and relative humidity can be dropped to lower level, namely temperature remains below 40 ℃, and relative humidity is below 30%.
Whole control procedure all can automatically be finished or also can manually be regulated and control to finish by control system, the operator only need to be according to the reference temperature that presets dry run, relative humidity, wind speed and the initial water content of input material and the final water content of dried material, and control system can be finished above-mentioned all tasks (getting as shown in Figure 3 control flow) automatically.
Embodiment 3 (Application Example):
1. no-load test
The device of Application Example carries out no-load test, the humiture response curve of this device under the test no-load condition.Fig. 4 is hot and humid test, and Temperature Setting is 80 ℃, the response curve of the temperature and humidity when relative humidity is set as 70%, and Fig. 5 is the test of low temperature and low humidity, and Temperature Setting is 5 ℃, the temperature and humidity response curve when relative humidity is set as 20%.Fig. 6 is the response curve that wind speed is set as 2m/s.Table 1 is the control performance analysis under the different humitures.
The performance evaluation of controlling under the different humitures of table 1
2. dry materials test
Use this device and carry out the dry materials test, material is multitude's beanpod.
(1) test material
The drying test of multitude's beanpod, pick up from fresh multitude's beans in experimental plot, get beanpod, boiling 10min in boiling water, remove the beanpod epidermis, get multitude's beanpod that about 1kg processed, in dry in advance at thermostatic drying chamber commonly used, recording its initial water content is 5.82 (butts), and requiring the product water content is 0.1 (butt).
(2) test method
The mensuration of water content (butt):
According to material initial water content X
0, the material initial weight G that detects of weight sensor
0And t
iMoment weight G
iCalculate t
iMoment water content X
i:
Computing formula is as follows:
The mensuration of reconstitution rate and shrinkage factor:
The mensuration of reconstitution rate: with the quality after the rehydration and the quality before the rehydration than value representation reconstitution rate.
The mensuration of shrinkage factor: adopt length, width and the thickness of tape and vernier caliper measurement multitude beanpod drying front and back, multitude's beanpod shrinkage factor computing formula is as follows:
In the formula: V
0Volume (cm for dry front multitude's beanpod
3); V
tVolume (cm for multitude's beanpod after the drying
3).
Subjective appreciation:
5 people group marking systems are adopted in sensory evaluation, and dried product is adopted in the evaluation of multitude's beanpod color and luster and shape, and the evaluation of mouthfeel is that drying multitude's beanpod behind the rehydration 5min, is drained in 100 ℃ of water, carries out the mouthfeel evaluation.
Color and luster: lovely luster, without brown stain 8-10, color and luster has slight brown stain 5-7, the serious brown stain 0-5 of color and luster
Shape: shrink less, flawless 8-10, shrinking has more greatly edge-curl phenomenon 5-7, the more serious 0-5 of crimping
Mouthfeel: tender and crisp 8-10 after the rehydration, tender and crisp after the rehydration, stiff sense 5-7 is arranged, stiff 0-5 after the rehydration
(3) result of the test
Fig. 7 a is the drying curve of multitude's beanpod under different experimental conditions, and Fig. 7 b is curve of drying speed.Fig. 8 is temperature, relative humidity and wind speed control curve.
Drying means of the present invention is used in test 2, adopts the drying means of alternating temperature humidity, presets drying condition and be before drying: temperature 70 C, relative humidity 45%, wind speed 2.0m/s.The early stage of drying, moisture content of material is higher, adopts higher temperature, simultaneously, in order to obtain higher rate of drying, adopts and tests a high relative humidity (45%).Along with the carrying out of drying, moisture reduces.At the later stage of drying, approximately about 60min, system adjusts to temperature 60 ℃ automatically according to the downward trend of rate of drying, and relative humidity reduces to 25%, so that keep higher rate of drying and good product quality.By the multitude's beanpod drying curve under the condition of alternating temperature humidity shown in Figure 6 and curve of drying speed as can be known, the time that reaches the water content 0.1 of product requirement is about 250min, system's autostop.
More above-mentioned three kinds of drying test results adopt the drying condition that changes as can be known, temperature, relative humidity and wind speed that namely the early stage of drying is higher, and the later stage of drying adopts lower temperature, relative humidity and wind speed, and rate of drying is fast, and drying time is short.And the dried material quality is better, and dry products is bright in colour, and brown stain is little, and shape is regular, and the distinctive light fragrance of multitude's beanpod is arranged, and rehydration speed is fast, and mouthfeel is tender and crisp.Concrete outcome sees Table 2.
The different drying conditions of table 2 are on the impact of the quality of multitude's beanpod
Claims (9)
1. drying device that is applicable to food is characterized in that:
Comprise hothouse (200), dehumidification system for runner (300), refrigeration system (400), heater (500), humidifier (600), circulation supply air system (700), main air road (800) and control system (900);
Hothouse (200), refrigeration system evaporator (422), heating (500), humidifier (600), circulation supply air system (700) are connected to form main air road (800) by airduct successively;
Dehumidification system for runner (300) is connected in parallel with main air road (800);
Circulation supply air system (700) comprises circulating fan (710) and variable-frequency governor (720), and described circulating fan is connected successively with variable-frequency governor.
2. drying device according to claim 1 is characterized in that:
Described hothouse (200) comprises casing (210), weighing tray (220) and weighing tray support (230);
Described casing (210) bottom has 4 holes, and 4 supports (230) of 4 weight sensors (933) and weighing tray (220) are installed respectively, and air uniform plate (240) is equipped with in casing (210) both sides;
Described casing (210) top has 2 holes, and Temperature Humidity Sensor (931) and air velocity transducer (932) are installed respectively.
3. drying device according to claim 1 is characterized in that:
Described dehumidification system for runner (300) comprises filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier (330) and electromagnetic air valve (341,342);
Filter (310), evaporimeter (421), blower fan (320), rotary dehumidifier are connected by airduct successively with electromagnetic air valve (341,342), are parallel on the main air road again.
4. drying device according to claim 1 is characterized in that:
Described refrigeration system (400) comprises a compressor (410), two evaporimeters (421,422), a condenser (430) and three magnetic valves (441,442,443), evaporimeter (421,422) respectively by magnetic valve (441,442) be connected with compressor (410), condenser (430) directly is connected with compressor (410), described evaporimeter (421) is installed in the dehumidification system for runner, evaporimeter (422) is installed in the main air road (800), and condenser is installed on outside the drying device casing.
5. drying device according to claim 1 is characterized in that:
Described control system (900) comprises computer (910), controller (920), signal detection module (930) and relay-contactor control system (940);
Computer (910), controller (920), signal detection module (930) are connected 940 with relay-contactor control system) connect successively;
Described signal detection module (930) comprises Temperature Humidity Sensor (931), air velocity transducer (932), weight sensor (933); Temperature Humidity Sensor (931), air velocity transducer (932) are connected 933 with weight sensor) be connected with controller (920) respectively;
Described Temperature Humidity Sensor (931) and air velocity transducer (932) are installed in the hothouse (200), and weight sensor (933) is installed on hothouse (200) bottom.
6. application rights requires the method for the described device dried foods of 1-5, and its step is as follows:
(1) food to be dried is placed hothouse;
(2) reference temperature, relative humidity, the wind speed of setting dry run, material initial water content and product water content;
(3) real-time sense weight, temperature, relative humidity, wind speed calculate water content, and draw the response curve of drying curve, curve of drying speed, temperature, relative humidity and wind speed;
(4) according to the feature of drying curve and curve of drying speed, adjust hothouse temperature, relative humidity and wind speed;
(5) water content with actual water content and product compares, and determines whether to finish dry run by controller (920);
(6) detect hothouse (200) interior actual temperature and relative humidity with Temperature Humidity Sensor (931), compare with predefined temperature and relative humidity, by the start and stop of controller (920) control heater (500), refrigeration system (400), dehumidification system for runner (300) and humidifier (600), temperature and relative humidity in the control hothouse.
7. method as claimed in claim 6, the method for wherein controlling dry indoor relative humidity is as follows: relative humidity is 50% when above, and refrigeration system (400) is started, and utilizes the dehumidifying of evaporimeter (422) dewfall; Relative humidity is 30% when following, and dehumidification system for runner (300) and refrigeration system (400) are started, and the method for utilizing the dehumidifying of adsorption and dehumidification and dewfall to combine dehumidifies; Temperature is more than 60 ℃ the time, starts heater (500) and carries out wet down.
8. method as claimed in claim 6, wherein said food is that fruits and vegetables, condiment, fish, meat, egg products, gel product are or/and cereal.
9. each described drying device application in food drying of claim 1-5 is characterized in that: described food is that fruits and vegetables, condiment, fish, meat, egg products, gel product are or/and cereal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN103610214A (en) * | 2013-11-27 | 2014-03-05 | 浙江海洋学院 | Energy saving device for circularly drying aquatic product at normal temperature |
| CN104006630A (en) * | 2013-12-13 | 2014-08-27 | 昆山洛博格机械技术咨询有限公司 | Multifunctional material drying device |
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| JP2010120278A (en) * | 2008-11-20 | 2010-06-03 | Toyo Seikan Kaisha Ltd | Drying device |
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| JP2010120278A (en) * | 2008-11-20 | 2010-06-03 | Toyo Seikan Kaisha Ltd | Drying device |
| JP2011089666A (en) * | 2009-10-20 | 2011-05-06 | Kikuji Yamashita | Food drying device |
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| CN104006630A (en) * | 2013-12-13 | 2014-08-27 | 昆山洛博格机械技术咨询有限公司 | Multifunctional material drying device |
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| CN107883703A (en) * | 2017-11-02 | 2018-04-06 | 中国水产科学研究院渔业机械仪器研究所 | Multifunction fishing band drying device |
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| CN108094492A (en) * | 2017-12-25 | 2018-06-01 | 广州皇上皇集团股份有限公司 | A kind of cured meat and fish drying device |
| CN108302901A (en) * | 2017-12-25 | 2018-07-20 | 广州皇上皇集团股份有限公司 | A kind of cured meat and fish drying means and device |
| CN108299310A (en) * | 2018-01-31 | 2018-07-20 | 浙江科技学院 | A method of preparing high stability rosuvastain calcium |
| CN108759318A (en) * | 2018-05-15 | 2018-11-06 | 安徽益草堂中药饮片有限公司 | A kind of drying means of wilsonii medicine materical crude slice |
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| CN109612873A (en) * | 2018-12-27 | 2019-04-12 | 温州际高检测仪器有限公司 | Full-automatic fiber quantitative chemical analysis baking oven |
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| CN109845950A (en) * | 2019-04-03 | 2019-06-07 | 河南工业大学 | A kind of dietary fiber drying unit |
| CN109845950B (en) * | 2019-04-03 | 2022-01-21 | 河南工业大学 | Dietary fiber drying device |
| CN110554141A (en) * | 2019-08-01 | 2019-12-10 | 珠海格力电器股份有限公司 | clothes humidity detection method and clothes hanger |
| CN111397324A (en) * | 2020-04-27 | 2020-07-10 | 吉林大学 | Condensation and heat gain grain drying foundation test device and control method thereof |
| CN112902638B (en) * | 2021-03-01 | 2023-09-26 | 广东省现代农业装备研究所 | Closed-loop intelligent tea drying method and dryer |
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| CN112798750B (en) * | 2021-03-26 | 2023-09-08 | 开封大学 | Multifunctional food detection table |
| CN114165997B (en) * | 2021-12-21 | 2023-08-25 | 内蒙古快为科技有限公司 | Intelligent drying equipment based on big data and control method thereof |
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