CN202885443U - Nitrogen source heat pump drying unit - Google Patents
Nitrogen source heat pump drying unit Download PDFInfo
- Publication number
- CN202885443U CN202885443U CN 201220425803 CN201220425803U CN202885443U CN 202885443 U CN202885443 U CN 202885443U CN 201220425803 CN201220425803 CN 201220425803 CN 201220425803 U CN201220425803 U CN 201220425803U CN 202885443 U CN202885443 U CN 202885443U
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- heat pump
- drying
- nitrogen
- nitrogen source
- air
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000001035 drying Methods 0.000 title claims abstract description 75
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000007791 dehumidification Methods 0.000 claims 1
- 235000016709 nutrition Nutrition 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003292 glue Substances 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 239000011324 bead Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002372 labelling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007605 air drying Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005325 percolation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001228 trophic effect Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000009777 vacuum freeze-drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
本实用新型涉及干燥装置领域，具体的说是一种氮气源热泵干燥机组，包括干燥箱、控制系统和室外冷凝器，所述干燥箱包括箱体和设置在箱体内的热泵室和干燥室，本机组构成氮气源的干燥气调设备，将热泵设备和氮气装置组成氮气热泵联合装置，构建以氮气为介质干燥物料的密闭循环回路，有效控制干燥室内氧气含量，使用高粘性玻璃胶将干燥房内外缝隙密封，并改造通风道，添加挡板、弧形导风板、匀风板使干燥气体介质在一定风速下均匀分布在干燥室内，本实用新型使用热泵和氮气联合装置能够充分利用热泵无污染、耗能低的优点，并且在以氮气为干燥介质的条件下对物料进行干燥，防止了物料氧化，有效的保留了物料的营养成分，提升干燥制品品质。
The utility model relates to the field of drying devices, in particular to a nitrogen source heat pump drying unit, which includes a drying box, a control system and an outdoor condenser. The drying box includes a box body and a heat pump chamber and a drying room arranged in the box body. This unit constitutes the dry air-conditioning equipment of nitrogen source. The heat pump equipment and nitrogen device are combined to form a nitrogen heat pump combined device. A closed circulation loop with nitrogen as the medium for drying materials is constructed to effectively control the oxygen content in the drying room. High-viscosity glass glue is used to seal the drying room. The internal and external gaps are sealed, and the ventilation channel is modified, and baffles, arc-shaped wind guide plates, and air uniform plates are added to make the dry gas medium evenly distributed in the drying room at a certain wind speed. Pollution, low energy consumption, and the material is dried under the condition of nitrogen as the drying medium, which prevents the oxidation of the material, effectively retains the nutritional content of the material, and improves the quality of the dried product.
Description
Technical field
The utility model relates to the drying device field, specifically a kind of source nitrogen heat pump drying unit.
Background technology
Agricultural product can prolong supply time through the storage and processing of science, adjust the dull and rush season of agricultural product, adjust more than regional lacking, and realize year-round supply, to satisfy people to the diversified demand of food, improve trophic level.It is reported that in developed country, the output value of agricultural storage and processing industry all is higher than agricultural, is 3.7:1 such as Britain, and Japan is 2.7:1, and France is 2.6:1, and the U.S. is 2.0:1, and China only is 0.4:1.Take grain as example, 4,000 ten thousand tons of Grain in China annual productions, what process through storage and processing only is 8%, total output value is 1:0.3, and developed country reaches 1:4.The main cause that produces this present situation is exactly that the level of production is low, drying means many but really can extensive use and few, in addition, dry after the goods loss of effective components seriously also be one of major reason that hinders the development of agricultural products in China storage.Present domestic dried product demand rises year by year, but also there are big gap in dried product active ingredient retention rate and foreign level, so the quality that keeps dry, improve product dried efficient, is the main direction of current drying technical research.
Usually use Constant Temp. Oven in the field of food of existing dry demand, vacuum drying chamber, hot-air drying device, freeze drying plant and and the drying device (such as infrared heat pump combined dryer) of heat pump united use, these devices generally all use air as drying medium and exist the hothouse space little, nutritional labeling in the too high or too low all fragile materials of baking temperature, cause the dried material quality to descend, particularly during dry fruits and vegetables since the quality that oxidation reaction causes descend, vacuum freeze drying can be preserved product quality relatively preferably, but has the large shortcoming of power consumption.
The utility model content
The utility model provides a kind of source nitrogen heat pump drying unit for solving in the prior art nutritional labeling in the dry fragile material, reducing materials quality and the shortcoming such as large that consumes energy.
The utility model is that the technical scheme that solves the problems of the technologies described above employing is:
A kind of source nitrogen heat pump drying unit, comprise drying box, control system and outdoor condenser, described drying box comprises casing and is arranged on casing interior heat pump chamber and hothouse, be placed with small handcart and material disc in the hothouse, be provided with the baffle plate of a level in the described hothouse near a side of heat pump chamber, baffle plate is divided into up and down two ventilating ducts with hothouse, material disc is arranged on the small handcart in the leg space ventilation road, is respectively equipped with in the upper and lower of heat pump chamber and hothouse two ventilating openings that ventilating duct is connected up and down;
Top, described heat pump chamber is equipped with condenser, the bottom is equipped with evaporimeter, evaporimeter, condenser and the condenser of being connected all are connected with compressor, also be provided with to the main air blower of hothouse overdraught road air-supply on top, heat pump chamber, be provided with the deflector of inclination in bottom, the heat pump chamber corner relative with the leg space ventilation mouth, bottom, heat pump chamber is provided with drainpipe;
In the ventilating duct on described hothouse top auxiliary heater is installed, hothouse up and down two ventilating ducts is connected away from an end of heat pump chamber, the top of this connected entrance is provided with arc wind waveguide plate, the below is distributed with air uniform plate, described air uniform plate is horizontally disposed with, and be arranged in order from top to bottom, the neighbouring air uniform plate 15 ~ 25mm that staggers in the horizontal direction makes air uniform plate be distributed in one on the inclined-plane of described connected entrance away from an end of material disc;
Sidewall at hothouse is equipped with high-pressure gas pipe, and high-pressure gas pipe one end is communicated with hothouse, and the other end is connected with nitrogen interface; Temperature sensor and humidity sensor all are equipped with in the ventilating duct two ends of hothouse bottom, and oxygen sensor is housed on the baffle plate;
Described main air blower, auxiliary heater, temperature sensor, humidity sensor and oxygen sensor are connected with control system and are connected;
Described high-pressure gas pipe is hyperbaric oxygen tracheae or elevated pressure nitrogen tracheae;
Described nitrogen interface connects nitrogen cylinder or nitrogen gas generator;
The indoor ventilation shaft that is connected with wet-emitting blower that is provided with of described heat pump;
The angle of described deflector and horizontal plane is 50 ° ~ 60 °;
In the ventilating duct on described hothouse top accessory fan is housed;
The described neighbouring air uniform plate 20mm that staggers in the horizontal direction, and one deck material disc horizontal alignment on each air uniform plate and the small handcart;
Suspention has deep bead in the ventilating duct of hothouse bottom, deep bead between air uniform plate and small handcart and with the air uniform plate perpendicular direction;
Described deep bead is plank;
Described small handcart is alloy trolley, and bottom installation pulley, and material disc is netted stainless steel wire.
The utility model consists of the dry air conditioning apparatus of source nitrogen, with heat-pump apparatus and nitrogen installation composition nitrogen heat pump combined unit, makes up the sealing and circulating loop take nitrogen as the medium dried material, effectively controls oxygen concentration in the hothouse;
The sealing and circulating loop that described structure is used for the nitrogen drying material refers to use the high viscosity glass cement with gap sealing inside and outside the drying shed, and the transformation ventilating duct, interpolation baffle plate, arc wind waveguide plate, air uniform plate are being evenly distributed in the hothouse drying medium (nitrogen) under certain wind speed;
Oxygen concentration is to detect oxygen concentration at dry indoor location oxygen sensor in described effective control hothouse, because main gas componant is oxygen and nitrogen in the atmosphere, can extrapolate nitrogen gas concn so detect oxygen concentration, can effectively control oxygen concentration in the hothouse by regulating the nitrogen air inflow, finish material is carried out drying under the different oxygen levels, the oxygen concentration content range is controlled at 3% ~ 21% in the hothouse after regulating, oxygen sensor detects oxygen concentration content pass into nitrogen in hothouse after automatically, and measured result directly reaches control system by the digital display Display panel;
Utilize accessory fan to improve the heat pump wind speed upper limit in the dry run, it is dry temperature required to utilize auxiliary heater that dry indoor temperature is risen to rapidly;
The described accessory fan raising heat pump wind speed upper limit of utilizing refers at upper ventilating duct place installation accessory fan, under the original main air blower prerequisite of heat-pump apparatus, further promote wind speed, described accessory fan is positioned on the upper ventilating duct at main air blower air outlet place, because the main air blower maximum wind velocity is 3m/s, when more the material of high wind speed requirement carries out drying when dry to some, improve wind speed by opening accessory fan, wind speed can reach 10m/s when main air blower and accessory fan move simultaneously, in the time of substantially can satisfying different types of dry materials to the requirement of wind speed;
It is described that to utilize auxiliary heater that dry indoor temperature is risen rapidly be that auxiliary heater is installed behind accessory fan, when just coming into operation, machine can make dry indoor temperature reach rapidly rated temperature, described auxiliary heater is to be positioned at accessory fan air outlet place resistance heating tube, move during start, can shift to an earlier date after tested 15min has 30 ℃ to be promoted to 70 ℃ dry indoor temperature;
On the utility model hothouse lower sides deep bead is housed, its effect is to make wind speed pass from the bottom to top material disc on the small handcart in the time of need to doing the experiment of dry percolation, can freely dismantle when not required, tests for advection after removing;
The utility model dried material temperature range is 30 ℃ ~ 70 ℃, and drying medium (nitrogen) is heated in condenser end again after evaporator end is dried, and then carries out energy exchange with material, thereby finishes the drying to material.
The beneficial effects of the utility model:
(1) the utility model uses heat pump and nitrogen combined unit can take full advantage of the advantage that heat pump is pollution-free, power consumption is low, and under the condition take nitrogen as drying medium, material is carried out drying, prevent the material oxidation, effectively kept the nutritional labeling of material, promoted the dried product quality;
(2) the utility model at dry indoor location oxygen sensor to detect oxygen concentration, and control oxygen concentration in the hothouse by regulating the nitrogen air inflow, the oxygen content scope control can carry out the drying of different oxygen content conditions as required 3% ~ 21% in the hothouse to material after regulating;
(3) the utility model is at dry indoor location air uniform plate, offset certain distance successively from top to bottom, and corresponding with each layer of small handcart material disc, the wind that ventilating duct can be blown out evenly divides to each material disc, to guarantee that every layer of material wind speed reaches unanimously, improve dry mass and drying efficiency;
(4) the utility model is equipped with wet-emitting blower, open first wet-emitting blower before can starting shooting, pass into again nitrogen after taking portion of air away, can reduce the nitrogen intake like this, when not needing to pass into the common heated-air drying of nitrogen, if dry material is more, moisture is larger, can open wet-emitting blower, take away moisture in the hothouse, accelerate rate of drying;
(5) small handcart is alloy trolley in the utility model, and high temperature resistant, high humidity, and bottom installation pulley can free in and out hothouse, and easy to operate, material disc is netted stainless steel wire, makes the dried material air permeability good, can shorten drying time, improves drying efficiency;
(6) between air uniform plate and small handcart, wind deflector is housed in the utility model, can freely dismantles, can realize as required advection and cross-flow drying to material;
(7) the utility model is installed accessory fan and can effectively be promoted wind speed when only driving main air blower can not satisfy requirement of experiment, significantly improves drying efficiency;
(8) the utility model adopts the drying equipment airtight performance after high-viscosity glass glue seals good, can prevent effectively that nitrogen from leaking outside, and well plays the effect of saving resource;
(9) the utility model is simple in structure, and equipment investment is little, and energy consumption is low, and is easy to control, can realize the cleaner production of real extensive continuous and automatic.
Description of drawings
Fig. 1 source nitrogen heat pump drying unit structure chart;
Reference numeral: 1, casing, 2, nitrogen interface, 3, high-pressure gas pipe, 4, arc wind waveguide plate, 5, baffle plate, 6, oxygen sensor, 7, auxiliary heater, 8, accessory fan, 9, temperature sensor, 10, humidity sensor, 11, small handcart, 12, material disc, 13, deep bead, 14, air uniform plate, 15, evaporimeter, 16, deflector, 17, compressor, 18, drainpipe, 19, outdoor fan, 20, outdoor condenser, 21, control system, 22, main air blower, 23, wet-emitting blower, 24, condenser.
The specific embodiment
Below in conjunction with specific embodiment the utility model is further elaborated.
As shown in Figure 1, a kind of source nitrogen heat pump drying unit, comprise drying box, control system 21 and outdoor condenser 20, described drying box comprises casing 1 and is arranged on casing interior heat pump chamber and hothouse, be placed with small handcart 11 and material disc 12 in the hothouse, it is characterized in that: the baffle plate 5 that is provided with a level in the described hothouse near a side of heat pump chamber, baffle plate 5 is divided into up and down two ventilating ducts with hothouse, material disc 12 is arranged on the small handcart 11 in the leg space ventilation road, is respectively equipped with in the upper and lower of heat pump chamber and hothouse two ventilating openings that ventilating duct is connected up and down;
Top, described heat pump chamber is equipped with condenser 24, the bottom is equipped with evaporimeter 15, evaporimeter 15, condenser 24 and the condenser 20 of being connected all are connected with compressor 17, also be provided with to the main air blower 22 of hothouse overdraught road air-supply on top, heat pump chamber, bottom, heat pump chamber and leg space ventilation mouth with respect to corner be provided with the deflector 16 that becomes 50 ° of angles with horizontal plane, bottom, heat pump chamber is provided with drainpipe 18;
In the ventilating duct on described hothouse top auxiliary heater 7 is installed, hothouse up and down two ventilating ducts is connected away from an end of heat pump chamber, the top of this connected entrance is provided with arc wind waveguide plate 4, the below is distributed with air uniform plate 14, described air uniform plate 14 is horizontally disposed with, and be arranged in order from top to bottom, neighbouring air uniform plate 14 20mm that staggers in the horizontal direction, make air uniform plate 14 be distributed in one on the inclined-plane of described connected entrance away from an end of material disc 12, and one deck material disc 12 horizontal alignments on each air uniform plate 14 and the small handcart 11;
Sidewall at hothouse is equipped with high-pressure gas pipe 3, and high-pressure gas pipe 3 one ends are communicated with hothouse, and the other end is connected with nitrogen interface 2; Temperature sensor 9 and humidity sensor 10 all are equipped with in the ventilating duct two ends of hothouse bottom, and oxygen sensor 6 is housed on the baffle plate 5;
Described main air blower 22, auxiliary heater 7, temperature sensor 9, humidity sensor 10 are connected with oxygen sensor and are connected with control system 21 respectively;
The indoor ventilation shaft that is connected with wet-emitting blower 23 that is provided with of described heat pump is opened first wet-emitting blower 23 before the start, pass into nitrogen after taking portion of air away again, can reduce the nitrogen intake like this; When not needing to pass into the common heated-air drying of nitrogen, if dry material is more, moisture is larger, can open wet-emitting blower, takes away moisture in the hothouse, accelerates rate of drying;
Described high-pressure gas pipe 3 is the hyperbaric oxygen tracheae, specification: Φ 8mm-Φ 10mm, have the characteristics of high pressure resistant, stretch-proof, acid and alkali-resistance, and two ends connect respectively nitrogen cylinder and hothouse, and the iron hoop sealing is used in the junction, can not reveal from interface to guarantee nitrogen;
Described small handcart 11 is the alloy trolley of the high 1360mm of the wide 950mm of long 750mm, and small handcart 11 divides up and down 5 layers, can put into 5 material discs 12, once can put into the 40kg material at most, material disc 12 is netted stainless steel wire, and pulley is installed in small handcart 11 bottoms, can free in and out hothouse;
Described air uniform plate 14 length are 1200mm, width is 100mm, totally 5, be arranged in order from top to bottom, neighbouring air uniform plate 14 20mm that staggers in the horizontal direction, and corresponding with each layer material disc 12 levels on the small handcart, the wind that ventilating duct can be blown out evenly divides to each material disc 12, reaches consistent to guarantee every layer of material wind speed;
Described arc wind waveguide plate 4 is the soft iron skin of the wide 1200mm of a block length 1000mm, and semicircular in shape is fixed on the corner of ventilating duct and hothouse, the effective like this drying medium skewness that causes owing to the excessive direct bump hothouse sidewall of wind speed avoided;
Suspention has deep bead 13 in the ventilating duct of hothouse bottom, deep bead 13, between air uniform plate 14 and small handcart 11 and with air uniform plate 14 perpendicular directions, this deep bead 13 is the plank of the wide 1200mm of a block length 1300mm, its effect is to make wind speed pass from the bottom to top material disc 12 on the small handcart 11 in the time of need to doing the experiment of dry percolation, can freely dismantle when not required, be the advection experiment after removing.
The concrete drying process principle of the utility model is: drying condition is set after the start, comprises: baking temperature and wind speed.Dried material is placed in the material disc 12 on the small handcart 11, small handcart 11 is pushed in the hothouse, open the nitrogen cylinder air bleeding valve, the nitrogen of discharging absorption dehydration indoor temperature and heating up at once after high-pressure gas pipe 3 is sent to hothouse, again through arriving material disc 12 behind the air uniform plate 14 even wind, carry out exchange heat with dried material, then enter evaporimeter 15, enter behind the evaporimeter 15 and evaporimeter 15 carries out energy exchange discharge moisture, the moisture of discharging compiles through deflector 16 water conservancy diversion, flowed out by drainpipe 18, drying medium nitrogen behind the discharge moisture becomes the higher gas of temperature at condenser 24 end absorbing heats, and process accessory fan 8 and auxiliary heater 7 improve respectively wind speed and the temperature of drying medium, at last to upper ventilating duct exit, to nitrogen air inlet place, so far finish a circulation through the wind deflector wind-guiding; When indoor oxygen content reaches requirement, close source nitrogen, form the interior gas medium of drying box and form interior circulation, the direction of arrow is the gas medium flow direction among Fig. 1.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425803 CN202885443U (en) | 2012-08-27 | 2012-08-27 | Nitrogen source heat pump drying unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425803 CN202885443U (en) | 2012-08-27 | 2012-08-27 | Nitrogen source heat pump drying unit |
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| Publication Number | Publication Date |
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| CN202885443U true CN202885443U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220425803 Expired - Fee Related CN202885443U (en) | 2012-08-27 | 2012-08-27 | Nitrogen source heat pump drying unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818434A (en) * | 2012-08-27 | 2012-12-12 | 河南科技大学 | Drying unit of nitrogen-source heat pump |
| CN106369959A (en) * | 2016-11-09 | 2017-02-01 | 湘潭大学 | Air energy heat pump agricultural product drying device |
| CN106839680A (en) * | 2017-04-01 | 2017-06-13 | 深圳天珑无线科技有限公司 | Drying device |
| CN107202488A (en) * | 2017-05-07 | 2017-09-26 | 青岛大学 | A kind of partial air dehumidifying Analysis of Heat Pump Drying System |
| CN107202487A (en) * | 2017-05-07 | 2017-09-26 | 青岛大学 | A kind of partial air dehumidifying Analysis of Heat Pump Drying System for high temperature production technology |
-
2012
- 2012-08-27 CN CN 201220425803 patent/CN202885443U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818434A (en) * | 2012-08-27 | 2012-12-12 | 河南科技大学 | Drying unit of nitrogen-source heat pump |
| CN102818434B (en) * | 2012-08-27 | 2014-12-17 | 河南科技大学 | Drying unit of nitrogen-source heat pump |
| CN106369959A (en) * | 2016-11-09 | 2017-02-01 | 湘潭大学 | Air energy heat pump agricultural product drying device |
| CN106839680A (en) * | 2017-04-01 | 2017-06-13 | 深圳天珑无线科技有限公司 | Drying device |
| CN107202488A (en) * | 2017-05-07 | 2017-09-26 | 青岛大学 | A kind of partial air dehumidifying Analysis of Heat Pump Drying System |
| CN107202487A (en) * | 2017-05-07 | 2017-09-26 | 青岛大学 | A kind of partial air dehumidifying Analysis of Heat Pump Drying System for high temperature production technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20130827 |