CN102488032B - Rotary-type rapid drying machine - Google Patents
Rotary-type rapid drying machine Download PDFInfo
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- CN102488032B CN102488032B CN 201110423215 CN201110423215A CN102488032B CN 102488032 B CN102488032 B CN 102488032B CN 201110423215 CN201110423215 CN 201110423215 CN 201110423215 A CN201110423215 A CN 201110423215A CN 102488032 B CN102488032 B CN 102488032B
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Abstract
The invention relates to a rotary-type rapid drying machine, characterized by comprising a frame, a drive device installed on the frame, a drive shaft driven by the drive device to rotate, a horizontal rotary heating barrel coaxially and fixedly connected with the drive shaft and a heating device for heating the rotary heating barrel. The drive shaft is fixedly connected to one axial end of the rotary heating barrel and born on the frame via a bearing seat; and the heating device comprises an electric heater disposed outside the rotary heating barrel, heating coils distributed on the barrel wall of the rotary heating barrel, and an electric brush assembly disposed on the drive shaft and used for enabling the electric heater and the heating coils to realize a conductive connection. The rotary-type rapid drying machine disclosed by the invention enables the heated substances to continuously roll over during heating process, thereby preventing the heated substances from being scorched.
Description
Technical field
The present invention relates to a kind of swinging flash drying machine, the flash baking that it stops in young worker's sequence to tealeaves available for tealeaves, or for the flash baking to other articles.
Background technology
In daily life, in order to ensure quality and improve production efficiency, some food (such as tealeaves) need to be dried by way of instant heating, and usual heating-up temperature can all reach 200 DEG C or so, and traditional drying unit has problems with：Heated food transfixion, easily causes that heating is uneven, even results in the phenomenon that food burnt and occurs.
The content of the invention
In order to solve the above mentioned problem present in prior art, the invention provides a kind of swinging flash drying machine, it can make heated material constantly be rolled in heating process, so as to avoid heated material from being burnt.
The technical scheme is that so constitute, a kind of swinging flash drying machine, it is characterised in that：It includes frame, the drive device being installed in frame, the drive shaft being rotated by drive device, the horizontal revolving cartridge heater being fixedly and coaxially connected with drive shaft and the heater for being heated to revolution cartridge heater.
The operation principle of above-mentioned technical proposal of the present invention is described as follows：Heated material is put into revolution cartridge heater, drive device drives revolution cartridge heater to rotate by drive shaft, device for simultaneous heating is heated to revolution cartridge heater, so that the heated material in revolution cartridge heater constantly rolls in heating process, both the efficiency of heating surface is greatly improved, is avoided that heated material because local heating is uneven and is burnt again.
A kind of preferred scheme of above-mentioned technical proposal of the present invention is as follows：
The drive shaft is fixedly connected on axial one end of revolution cartridge heater and by bearing block support in frame；The heater includes located at the electric heater turned round outside cartridge heater, the heating coil being distributed on revolution cartridge heater barrel and being arranged at being used in drive shaft makes electric heater and heating coil realize the brush assembly of electric being conductively connected.After electric heater is connected energization with heating coil by brush assembly of electric produces electromagnetic induction, produces vortex inside revolution cartridge heater and generate heat, the material being positioned in revolution cartridge heater is quickly heated.By electromagnetic induction heating, the efficiency of heating surface is not only can further improve, shortens the heat time, Tea Production cost is reduced, and it is capable of reducing energy consumption, it is to avoid the environmental pollution caused by being heated using liquefied gas.
In order to realize electrical conduction of the movement parts (following revolution cartridge heater to do the heating coil of gyration) between static element (static electric heater), the brush assembly of electric includes more than twice being fixedly installed on the coil connection conducting slip ring that on the axially different position in drive shaft periphery and mutually insulated is isolated around drive axis, more than two be connected respectively with each coil touches the coil connection elastic conduction connection component that conductive and relative frame flexible fastening is connected with conducting slip ring with combined pressure, the heating coil is inscribed wire by coil and is connected conductive with conducting slip ring connection with coil, the coil connection is connected with elastic conduction connection component by coil external wire with electric heater.
In order to further realize temperature automatic control, the heater also includes the temperature controller that output end is connected with electric heater and the thermocouple being installed on revolution cartridge heater barrel；The brush assembly of electric is also fixedly installed on the thermocouple connection conducting slip ring, twice that on the axially different position in drive shaft periphery and mutually insulated is isolated around drive axis including bipassage ring and is connected respectively with each thermocouple with thermocouple connection elastic conduction connection component of the conducting slip ring with the tactile conduction of combined pressure and relative frame flexible fastening connection；The axially different position of drive shaft is distributed in conducting slip ring with conducting slip ring and coil connection for the thermocouple connection and mutually insulated is isolated；The thermocouple is inscribed wire by thermocouple and is connected conductive with conducting slip ring connection with thermocouple, and the input of the temperature controller is connected by thermocouple external wire with thermocouple connects conductive with elastic conduction connection component；The electric heater is frequency-changing electric heater.During work, the temperature signal for the revolution cartridge heater that thermocouple is detected passes to temperature controller, then commands frequency conversion heater by temperature controller, so as to realize temperature automatic control, temperature can arbitrarily be set up as needed.
For prior art, the present invention has advantages below：
(1) heated material can be made constantly to be rolled in heating process, so that heated material is heated evenly, it is to avoid heated material is burnt.
(2) because revolution cartridge heater uses electromagnetic induction heating, heat and carried out in the inside of revolution cartridge heater, entirety is heated evenly, and revolution cartridge heater is outside heat-insulated using heat insulation layer, therefore it will not only greatly improve the thermal efficiency to external cooling, shorten the heat time, production cost is reduced, and it is capable of reducing energy consumption, it is to avoid environmental pollution.Shown according to the prototype test results：Oolong tea is carried out using swinging flash drying machine of the present invention to stop young worker's sequence, electric energy used by every 500 grams of sample teas is 0.8kWh, closes 0.6 yuan, compared with being heated with liquefied gas, can lower consumption 70%.
(3) because the motor of driving revolution cartridge heater is controlled using variable-frequency governor, transmission can be made more steady, it is more efficient.
Brief description of the drawings
Fig. 1 is a kind of operation principle schematic diagram for swinging flash drying machine that the present invention is provided.
Fig. 2 is a kind of organigram of embodiment 1 for swinging flash drying machine that the present invention is provided.
Fig. 3 is Fig. 2 another discharging view.
Fig. 4 is Fig. 3 top view.
Fig. 5 is Fig. 3 right view.
Fig. 6 is the local connection enlarged diagram of the parts such as brush assembly of electric, drive shaft and heating coil in embodiment 1, and Fig. 6 is Fig. 4 A-A close-up schematic views.
Fig. 7 is a kind of organigram of embodiment 2 for swinging flash drying machine that the present invention is provided.
Fig. 8 is Fig. 7 top view.
Fig. 9 is the local connection enlarged diagram of the parts such as brush assembly of electric, drive shaft and heating coil in embodiment 2, and Fig. 9 is Fig. 7 B-B close-up schematic views.
Label declaration in figure：1, turn round cartridge heater, 2, drive shaft, 3, heating coil, 4, coil connection conducting slip ring, 5, coil connection carbon brush, 6, carbon brush holder support column, 7, coil connection elastic carbon brush holder, 8, wire, 9 is inscribed in coil, coil external wire, 10, frequency conversion heater, 11, thermocouple connection conducting slip ring, 12, thermocouple connection carbon brush, 13, thermocouple connection elastic carbon brush holder, 14, temperature controller, 15, thermocouple, 16, wire, 17 is inscribed in thermocouple, thermocouple external wire, 18, heat insulation layer, 19, motor, 20, transmission device, 21, variable-frequency governor, 22, feed inlet and outlet, 23, cartridge heater protective cover, 24, frame, 25, movable underframe, 26, overturn control shaft, 27, upset control bearing housing, 28, Auxiliary support device, 29, support roller group, 30, discharging hand handle, 31, bearing block, 32, integral type insulation body, 33, interior insulation set, 34, overhang insulation body, 35, end fixed cover, 36, resilient metal member, 37, inner support post, 38, change-over switch.
Embodiment
Present invention is described in detail with reference to Figure of description and embodiment：
A kind of structural representation of embodiment 1 of the swinging flash drying machine provided as shown in figs 1 to 6 for the present invention, a kind of structural representation of embodiment 2 of the swinging flash drying machine provided as shown in figs. 7 to 9 for the present invention.Swinging flash drying machine in figure includes frame 24, the drive device being installed in frame 24, the drive shaft 2 being rotated by drive device, the horizontal revolving cartridge heater 1 being fixedly and coaxially connected with drive shaft 2 and the heater for being heated to revolution cartridge heater 1.
The drive shaft 2 is fixedly connected on axial one end of revolution cartridge heater 1 and is supported on by bearing block 31 in frame 24；The heater includes located at the electric heater 10 turned round outside cartridge heater 1, the heating coil 3 being distributed on the revolution barrel of cartridge heater 1 and being arranged at being used in drive shaft 2 makes electric heater 10 realize the brush assembly of electric being conductively connected with heating coil 3.
The brush assembly of electric matches somebody with somebody the coil connection elastic conduction connection component that combined pressure touches conduction and the relative flexible fastening of frame 24 connection including more than twice being fixedly installed on coil connection conducting slip ring 4, more than two be connected respectively with each coil that on the peripheral axially different position of drive shaft 2 and mutually insulated is isolated around the axis of drive shaft 2 with conducting slip ring 4, the heating coil 3 is connected with coil by the inscribed wire 8 of coil and connects conduction with conducting slip ring 4, and the coil connection elastic conduction connection component is connected by coil external wire 9 with electric heater 10.
The heater also includes the temperature controller 14 that output end is connected with electric heater 10 and the thermocouple 15 being installed on the revolution barrel of cartridge heater 1；The brush assembly of electric is also fixedly installed on the thermocouple connection conducting slip ring 11, twice that on the peripheral axially different position of drive shaft 2 and mutually insulated is isolated and be connected respectively with each thermocouple including bipassage ring around the axis of drive shaft 2 matches somebody with somebody the tactile conduction of combined pressure and relatively the thermocouple connection elastic conduction connection component of the flexible fastening of frame 24 connection with conducting slip ring 4；The thermocouple connection conducting slip ring 11 is distributed in the axially different position of drive shaft 2 with coil connection conducting slip ring 4 and mutually insulated is isolated；The thermocouple 15 is connected with thermocouple by the inscribed wire 16 of thermocouple and connects conduction with conducting slip ring 11, and the input of the temperature controller 14 is connected by thermocouple external wire 17 with thermocouple connects conductive with elastic conduction connection component；The electric heater 10 is frequency-changing electric heater.
Embodiment 1- is illustrated in figure 6 the brush assembly of electric of the embodiment of the present invention 1：The brush assembly of electric is also placed on the integral type insulation body 32 of the periphery of drive shaft 2 including fixing and is fixedly arranged in bearing block 31 or frame 24 and makes coil connection elastic conduction connection component and thermocouple connection elastic conduction connection component with respect to the carbon brush holder support column 6 that the flexible fastening of frame 24 is connected positioned at the integral type insulation side of body 32；The integral type insulation body 32 is divided into the axial both sides of bearing block 31 with revolution cartridge heater 1；The coil connection elastic conduction connection component is constituted by pressing to touch in the coil connection carbon brush 5 on coil connection conducting slip ring 4 and the elastic carbon brush holder 7 of the coil connection being connected between coil connection carbon brush 5 and carbon brush holder support column 6；The thermocouple connection elastic conduction connection component is constituted by pressing to touch in the thermocouple connection carbon brush 12 on thermocouple connection conducting slip ring 11 and the elastic carbon brush holder 13 of the thermocouple connection being connected between thermocouple connection carbon brush 12 and carbon brush holder support column 6；The coil connection is fixedly installed in the periphery of integral type insulation body 32 with conducting slip ring 4 and thermocouple connection with conducting slip ring 11；The inner that wire 8 is inscribed in the coil is connected with heating coil 3, and center section is through the duct in the body of drive shaft 2, and outer end is connected with coil to be connected with conducting slip ring 4；The inner that wire 16 is inscribed in the thermocouple is connected with thermocouple 15, and center section is through the duct in the body of drive shaft 2, and outer end is connected with thermocouple to be connected with conducting slip ring 4.
Embodiment 2- is illustrated in figure 9 the brush assembly of electric of the embodiment of the present invention 2：The brush assembly of electric is also including the fixed end fixed cover 35 for being used for making coil connection elastic conduction connection component with respect to the inner support post 37 that the flexible fastening of frame 24 is connected, being fixedly installed on the overhang insulation body 34 of the outer end of drive shaft 2 and be fixedly arranged in frame 24 and be located at the side of overhang insulation body 34 for being placed on the periphery of drive shaft 2 and covering 33 located at the interior insulation turned round between cartridge heater 1 and bearing block 31, being fixedly arranged on frame 24 or bearing block 31 and 33 sides are covered positioned at interior insulation；The coil connection conducting slip ring 4 is fixedly installed in the periphery of interior insulation set 33；Thermocouple connection conducting slip ring 11 is fixedly installed in the periphery of overhang insulation body 34；The coil connection elastic conduction connection component is constituted by pressing to touch in the coil connection carbon brush 5 on coil connection conducting slip ring 4 and the elastic carbon brush holder 7 of the coil connection being connected between coil connection carbon brush 5 and inner support post 37；The thermocouple connection with elastic conduction connection component by a side pressure touch in thermocouple connection with conducting slip ring 11, the resilient metal member 36 that the other end is fixed on end fixed cover 35 and is conductively connected with thermocouple external wire 17 constitutes；The inner that wire 8 is inscribed in the coil is connected with heating coil 3, and center section is through interior insulation set 33, and outer end is connected with coil to be connected with conducting slip ring 4；The inner that wire 16 is inscribed in the thermocouple is connected with thermocouple 15, and center section is through the duct in the body of drive shaft 2 and overhang insulation body 34, and outer end is connected with thermocouple to be connected with conducting slip ring 4.
In embodiment 1 and embodiment 2, in order to avoid to external cooling, improving the thermal efficiency, shorten the heat time, reduce energy consumption, it is to avoid environmental pollution, heat insulation layer 18 is provided with outside the barrel of the revolution cartridge heater 1.
The drive device includes motor 19 and the transmission device 20 being connected between motor 19 and drive shaft 2.Motor 19 drives drive shaft 2 to rotate by transmission device, and drive shaft 2 drives revolution cartridge heater 1 to realize gyration again, the article in revolution cartridge heater 1 is constantly rolled in heating process.
In order that the rotating speed of revolution cartridge heater can be adjusted arbitrarily as needed, the drive device also includes the variable-frequency governor 21 for being used for controlling motor 19 to work, so as to make motor realize stepless speed regulation.
Discharging for convenience, the revolution cartridge heater 1 is provided with the feed inlet and outlet 22 that can be opened and closed in its axial other end for being not provided with drive shaft 2；The swinging flash drying machine also includes the cartridge heater protective cover 23 for being placed on the outside of revolution cartridge heater 1 and being fixedly connected with frame 24, and for supporting the movable underframe 25 of cartridge heater protective cover 23, the cartridge heater protective cover 23 is connected by controlling bearing housing 27 to rotate with the upset on movable underframe 25 with the vertically disposed upset control shaft 26 of its axis, the Auxiliary support device 28 for making cartridge heater protective cover 23 keep horizontal service position is additionally provided between cartridge heater protective cover 23 and movable underframe 25, the Auxiliary support device 28 is divided into the axially different position of cartridge heater protective cover 23 with upset control shaft 26.
For the ease of the levelness of adjustment revolution cartridge heater, the Auxiliary support device 28 is by the adjusting nut that is fixedly connected on cartridge heater protective cover 23 and is threadedly coupled with adjusting nut and adjustment bolt that lower end is supported on movable underframe 25 is constituted；The cartridge heater protective cover 23 is provided with the support roller group 29 for being used for supporting revolution cartridge heater 1 at it with the place end identical one end bottom of feed inlet and outlet 22.
Discharging is carried out for the ease of overturning whole cartridge heater protective cover 23, cartridge heater protective cover 23 is provided with discharging hand 30 in itself and the place end identical one end of feed inlet and outlet 22.
For the ease of the movement of swinging flash drying machine of the present invention, the bottom of the movable underframe 25 can also be provided with castor.
When the above embodiment of the present invention works, the input power of frequency conversion heater 10 can be：AC three-phase 380V, power 20KW, frequency 50HZ；The out-put supply of frequency conversion heater 10 can be：Direct current 500V, frequency 16-20KHZ, transmission power 1.1KW.The input power of temperature controller 14 can be：Alternating current 220V, 50HZ.The input power of variable-frequency governor 21 can be：Alternating current 220V, 50HZ.
Heater of the present invention is not precluded within mode of revolution cartridge heater 1 bottom using liquefied gas or heated by gas, but be for example heated that not uniform enough the, thermal efficiency is not high enough, the limitations such as certain pollution can be caused to environment comparatively, existing using the mode of liquefied gas or heated by gas by the way of electromagnetic induction heating described in embodiment 1 and embodiment 2.
Claims (5)
1. a kind of swinging flash drying machine, it is characterised in that：It includes frame（24）, be installed on frame（24）On drive device, the drive shaft that is rotated by drive device（2）With drive shaft（2）The horizontal revolving cartridge heater being fixedly and coaxially connected（1）And for revolution cartridge heater（1）The heater heated；
The drive shaft（2）It is fixedly connected on revolution cartridge heater（1）Axial one end and pass through bearing block（31）It is supported on frame（24）On；The heater is included located at revolution cartridge heater（1）Outside electric heater（10）, be distributed in revolution cartridge heater（1）Heating coil on barrel（3）And it is arranged at drive shaft（2）On be used for make electric heater（10）With heating coil（3）Realize the brush assembly of electric being conductively connected；
The brush assembly of electric is included more than twice around drive shaft（2）Axis is fixedly installed on drive shaft（2）On the axially different position in periphery and mutually insulated isolation coil connection conducting slip ring（4）, more than two be connected respectively with each coil use conducting slip ring（4）Conductive and relative frame is touched with combined pressure（24）Elastic conduction connection component, the heating coil are used in the coil connection of flexible fastening connection（3）Wire is inscribed by coil（8）It is connected with coil and uses conducting slip ring（4）Connection is conductive, and the coil connection passes through coil external wire with elastic conduction connection component（9）With electric heater（10）Connection；
The heater also includes output end and electric heater（10）The temperature controller of connection（14）And it is installed on revolution cartridge heater（1）Thermocouple on barrel（15）；The brush assembly of electric also includes bipassage ring around drive shaft（2）Axis is fixedly installed on drive shaft（2）On the axially different position in periphery and mutually insulated isolation thermocouple connection conducting slip ring（11）, twice are connected with each thermocouple use conducting slip ring respectively（4）Conductive and relative frame is touched with combined pressure（24）Elastic conduction connection component is used in the thermocouple connection of flexible fastening connection；The thermocouple connection conducting slip ring（11）It is connected with coil and uses conducting slip ring（4）It is distributed in drive shaft（2）Axially different position and mutually insulated isolate；The thermocouple（15）Wire is inscribed by thermocouple（16）It is connected with thermocouple and uses conducting slip ring（11）Connection is conductive, the temperature controller（14）Input pass through thermocouple external wire（17）It is connected with thermocouple and connects conductive with elastic conduction connection component；The electric heater（10）For frequency-changing electric heater（10）；
The brush assembly of electric also includes fixation and is placed on drive shaft（2）Periphery and located at revolution cartridge heater（1）And bearing block（31）Between interior insulation set（33）, be fixedly arranged on frame（24）Or bearing block（31）Above and positioned at interior insulation set（33）Side be used for make coil connection elastic conduction connection component with respect to frame（24）The inner support post of flexible fastening connection（37）, be fixedly installed on drive shaft（2）The overhang insulation body of outer end（34）And it is fixedly arranged on frame（24）Above and positioned at overhang insulation body（34）The end fixed cover of side（35）；The coil connection conducting slip ring（4）It is fixedly installed in interior insulation set（33）Periphery；Thermocouple connection conducting slip ring（11）It is fixedly installed in overhang insulation body（34）Periphery；
The coil connection elastic conduction connection component is touched in coil connection conducting slip ring by pressing（4）On coil connection carbon brush（5）Be connected to coil connection carbon brush（5）With inner support post（37）Between coil connection with elastic carbon brush holder（7）Composition；The thermocouple connection is touched in thermocouple connection conducting slip ring with elastic conduction connection component by a side pressure（11）The upper, other end is fixed on end fixed cover（35）It is upper and with thermocouple external wire（17）The resilient metal member being conductively connected（36）Composition；
Wire is inscribed in the coil（8）The inner and heating coil（3）Connection, center section passes through interior insulation set（33）, outer end is connected with coil and uses conducting slip ring（4）Connection；Wire is inscribed in the thermocouple（16）The inner and thermocouple（15）Connection, center section passes through drive shaft（2）Internal duct and overhang insulation body（34）, outer end is connected with thermocouple and uses conducting slip ring（4）Connection.
2. swinging flash drying machine according to claim 1, it is characterised in that：The revolution cartridge heater（1）Barrel outside be provided with heat insulation layer（18）.
3. swinging flash drying machine according to claim 1, it is characterised in that：The drive device includes motor（19）And it is connected to motor（19）And drive shaft（2）Between transmission device（20）.
4. swinging flash drying machine according to claim 3, it is characterised in that：The drive device also includes being used for controlling motor（19）The variable-frequency governor of work（21）.
5. swinging flash drying machine according to claim 1, it is characterised in that：The revolution cartridge heater（1）Drive shaft is not provided with it（2）The axial other end be provided with the feed inlet and outlet that can open and close（22）；The swinging flash drying machine also includes being placed on revolution cartridge heater（1）Outside and and frame（24）The cartridge heater protective cover being fixedly connected（23）And for supporting cartridge heater protective cover（23）Movable underframe（25）, the cartridge heater protective cover（23）By with the vertically disposed upset control shaft of its axis（26）With located at movable underframe（25）On upset control bearing housing（27）Rotate connection, cartridge heater protective cover（23）With movable underframe（25）Between be additionally provided with for making cartridge heater protective cover（23）Keep the Auxiliary support device of horizontal service position（28）, the Auxiliary support device（28）With upset control shaft（26）It is divided into cartridge heater protective cover（23）Axially different position；The Auxiliary support device（28）By being fixedly connected on cartridge heater protective cover（23）On adjusting nut and be threadedly coupled with adjusting nut and lower end is supported in movable underframe（25）On adjustment bolt constitute；The cartridge heater protective cover（23）In itself and feed inlet and outlet（22）Place end identical one end bottom, which is provided with, to be used for supporting revolution cartridge heater（1）Support roller group（29）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110423215 CN102488032B (en) | 2011-12-16 | 2011-12-16 | Rotary-type rapid drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110423215 CN102488032B (en) | 2011-12-16 | 2011-12-16 | Rotary-type rapid drying machine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310052388.5A Division CN103110170B (en) | 2011-12-16 | 2011-12-16 | Rotary type fast dryer |
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| Publication Number | Publication Date |
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| CN102488032A CN102488032A (en) | 2012-06-13 |
| CN102488032B true CN102488032B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110423215 Active CN102488032B (en) | 2011-12-16 | 2011-12-16 | Rotary-type rapid drying machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103354670B (en) * | 2013-07-19 | 2015-12-09 | 南京中电熊猫照明有限公司 | A kind of conduction heating type lamp holder dries assembling system |
| CN103844335B (en) * | 2014-01-24 | 2017-01-04 | 浙江美大实业股份有限公司 | Fry the upset stir-frying mechanism of fruit machine |
| CN103844334B (en) * | 2014-01-24 | 2016-04-06 | 浙江美大实业股份有限公司 | Fry fruit machine |
| WO2018094592A1 (en) * | 2016-11-23 | 2018-05-31 | 赵映芳 | Temperature measurement connector for rotary drying drum |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201270746Y (en) * | 2008-08-25 | 2009-07-15 | 黄一峰 | Drum-type direct-connecting electrical heating tea-steaming machine |
| CN201733793U (en) * | 2010-07-08 | 2011-02-09 | 东莞市蓝威实业有限公司 | Tea leaves water removing machine |
| CN202340748U (en) * | 2011-12-16 | 2012-07-25 | 叶再辉 | Rotary fast dryer |
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