CN107410062A - Solar air heat engine charging device based on Electromagnetic Control and speed governing - Google Patents
Solar air heat engine charging device based on Electromagnetic Control and speed governing Download PDFInfo
- Publication number
- CN107410062A CN107410062A CN201710390036.9A CN201710390036A CN107410062A CN 107410062 A CN107410062 A CN 107410062A CN 201710390036 A CN201710390036 A CN 201710390036A CN 107410062 A CN107410062 A CN 107410062A
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- China
- Prior art keywords
- heat engine
- air heat
- charging device
- hopper
- electromagnetic control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 230000005855 radiation Effects 0.000 claims abstract description 9
- 230000005693 optoelectronics Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 235000021050 feed intake Nutrition 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K5/00—Feeding devices for stock or game ; Feeding wagons; Feeding stacks
- A01K5/02—Automatic devices
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K39/00—Feeding or drinking appliances for poultry or other birds
- A01K39/01—Feeding devices, e.g. chainfeeders
- A01K39/012—Feeding devices, e.g. chainfeeders filling automatically, e.g. by gravity from a reserve
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Birds (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The present invention relates to air thermal engine technology field, a kind of more particularly to solar air heat engine charging device based on Electromagnetic Control and speed governing, including air heat engine mechanism and batch charging mechanism, the air heat engine mechanism includes shift piston, displacement cylinder, working piston, working cylinder and flywheel；The batch charging mechanism includes cast hopper, hopper, support, bar shaped bucket and stand, the both sides of the stand are respectively equipped with bearing, the minute wheel is connected by gearbox with being arranged on the bearing of the stand side, conveyer belt is wrapped between two bearings, the cast hopper is fixed on the conveyer belt, the both sides of the stand are respectively equipped with optoelectronic switch, and the hopper is fixed on the bracket, and the bar shaped bucket is arranged on the lower section of the hopper.The present invention collects solar energy by concentrated radiation collector, and utilization ratio is high, is adapted to the feeding apparatus of big-and-middle-sized plant, both reduces manual labor, significantly reduce cost again, while reduce pollution.
Description
Technical field
The present invention relates to air thermal engine technology field, more particularly to a kind of solar air based on Electromagnetic Control and speed governing
Heat engine charging device.
Background technology
Solar energy is a kind of clean and sustainable caused energy, its aboundresources, both can freely be used, and without fortune
It is defeated, to environment without any pollution, but it is suitable to the utilization rate of solar energy low in living, and most solar energy collectings
Installation cost is high.All it is Manual material feeding before some big-and-middle-sized plant's feed doors, it is a quite heavy physical labor to feed intake
It is dynamic, and operating cost is at a relatively high.Although some automatic charging equipment, the electricity that power source is all in the prior art be present
Can, consuming electricity is larger, and cost is higher.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned technology, and provide a kind of sun based on Electromagnetic Control and speed governing
Energy air heat engine charging device, is fed intake using clean energy resource, saves cost.
The present invention to achieve the above object, using following technical scheme：
A kind of solar air heat engine charging device based on Electromagnetic Control and speed governing, including air heat engine mechanism and throwing
Expect mechanism, the air heat engine mechanism includes shift piston, displacement cylinder, working piston, working cylinder and flywheel, and work is lived
Plug is connected with shift piston by connecting rod with flywheel, and the lower section of flywheel is the working piston and working cylinder, the right of flywheel
For the shift piston and displacement cylinder, connected between the working cylinder and displacement cylinder with breather pipe, it is characterised in that：Institute
State working piston bottom and be fixed with permanent magnet, corresponding working cylinder bottom is provided with iron core, is wound with outside the iron core
Electromagnet made of magnet coil and water pipe, the water pipe are connected by water circulating pump with the water tank；The batch charging mechanism bag
Cast hopper, hopper, support, bar shaped bucket and stand are included, the both sides of the stand are respectively equipped with bearing, and the minute wheel passes through change
Fast case is connected with being arranged on the bearing of the stand side, is wrapped with conveyer belt between two bearings, the cast hopper is fixed on
On the conveyer belt, the both sides of the stand are respectively equipped with optoelectronic switch, and the hopper is fixed on the bracket, the bar shaped
Bucket is arranged on the lower section of the hopper.
Preferably, the middle part of the cast hopper is provided with baffle plate, and the cast hopper obtains bottom and is provided with magnetic valve.
Preferably, the air heat engine mechanism side is provided with solar radiation centralized collection device.
Preferably, it is provided with flywheel and surveys rotating speed mark and angle measurement scale designation, double photoelectric door collection photoelectricity gate signal, warp
After microprocessor processes, by rotating speed angular signal terminal transmit the measurement signal of real-time heat engine rotating speed.
Preferably, high-temperature end sensor is provided with displacement cylinder right-hand member, left end is provided with low temperature end sensor.
Preferably, pressure sensor and three signal output terminals, three signal output parts are provided with working cylinder bottom
Son is rotating speed/angular signal, pressure signal, T1/T2 temperature signals respectively.
Preferably, there is high-temperature end sensor in heat pipe right-hand member, have low temperature end temperature sensor in heat pipe left end,
By the two sensors, the temperature in heat pipe can be monitored in real time, and by T1 T2 temperature signals terminal transmit it is real-time
Measurement signal.
Preferably, pressure sensor is connected by breather pipe in working cylinder bottom with cylinder, measures the pressure in cylinder,
Real-time measurement signal is transmitted by the pressure signal terminal on base.
The beneficial effects of the invention are as follows:Relative to prior art, the present invention collects the sun by concentrated radiation collector
Can, utilization ratio is high, well using solar energy, so as to drive air heat engine, and then draws cast hopper and is fed intake, feed intake
Move forward and backward and be controlled by electromagnetic principle and speed governing, with it is reasonable, efficient, quick, cheap, cost is low, be adapted to big
The feeding apparatus of medium-sized plant, both reduce manual labor, significantly reduce cost again, while reduce pollution.
Brief description of the drawings
Fig. 1 is the air heat engine structural representation of the present invention；
Fig. 2 is the charging device structural representation of the present invention；
Fig. 3 is the principle schematic that the control flywheel of the present invention is run with setting speed；
Operation logic and the schematic diagram for the principle that feeds intake before and after the control cast hopper of Fig. 4 present invention.
Embodiment
Below in conjunction with the accompanying drawings and preferred embodiment describes the embodiment of the present invention in detail.It is as shown in figure 1, of the invention
It is related to a kind of solar air heat engine charging device based on Electromagnetic Control and speed governing, is received it is characterized in that being concentrated by solar radiation
Storage 23, air heat engine 29, the three parts of charging device 27 composition, wherein charging device includes cast hopper 19, transmission as shown in Figure 2
Band 20, bearing 21, hopper 24, bar shaped bucket 25 and support 26.
As shown in figure 1, air heat engine includes：Shift piston 1, displacement cylinder 2, working piston 3, working cylinder 4, heat pipe
5th, breather pipe 6, flywheel 14 form.
There is high-temperature end sensor 7 in the right-hand member of heat pipe 5, have low temperature end temperature sensor 8 in the left end of heat pipe 5, lead to
Cross the two sensors, can monitor the temperature in heat pipe in real time, and by T1 T2 temperature signals terminal 13 transmit in real time
Measurement signal.It is provided with flywheel and surveys rotating speed mark 33 and angle measurement scale designation 38.
Pressure sensor 10 is connected by breather pipe 6 in the bottom of working cylinder 4 with cylinder, measures the pressure in cylinder, is led to
The pressure signal terminal 12 crossed on base transmits real-time measurement signal.
Flywheel top is provided with double photoelectric door 9, gathers photoelectricity gate signal, after microprocessor processes, passes through Zhuan Su corners
Signal terminal 11 transmits the measurement signal of real-time heat engine rotating speed.
The temperature that solar radiation centralized collection device 23 is collected into the sun will directly affect the heated situation of heat pipe 5, from
And make it that the pressure of the internal piston of air heat engine 29 rises or declined, and then influence the rotating speed of flywheel 14.In order to solve by
In the case that the uneven heating of heat pipe 5 or sunshine are not too strong, cause to cause flywheel 14 from reaching setting speed operation
Problem, as shown in figure 1, adding electromagnet and armature 15 on the bottom of working cylinder 4, permanent magnet 32 is added on working piston 3,
Piston movement in assistant cylinder.Magnet coil 16 and water pipe 31 alternate and are wrapped in electromagnetic core on the iron core of electromagnet
On, one side magnet coil 16 can produce magnetic force, and another aspect water pipe 31 can be reduced because eddy current effect produces heat, drop
The low temperature at low temperature end so that the utilization ratio of heat engine is higher.
Water pipe 31 for cooling is wrapped in electromagnetic core, there is water tank 34 and water circulating pump 35 outside magnet coil 16
A water circulation system is formed with water pipe 31, to reduce because eddy current effect produces heat, the temperature at low temperature end is reduced, makes
The utilization ratio for obtaining heat engine is higher.
As shown in figures 1 and 3, the rotating speed of air heat engine 29, pressure, temperature signal respectively by rotating speed angular signal end
Son 11, pressure signal terminal 12, T1 13 3 terminals of T2 temperature signals terminal transmit a signal to controller, pass through controller
Control external dc power supply is given to adjust the polarity that magnet coil 16 is passed through DC current.If the high-temperature end temperature of heat pipe 5
Sensor 7 monitors that temperature is relatively low, when causing the rotating speed of flywheel 14 to be less than setting speed, when permanent magnet 32 moves upwards
Wait, magnet coil 16 will be passed through with the polarity identical direct current of permanent magnet 32, homopolarity is mutually exclusive, come auxiliary piston motion.
When permanent magnet 32 moves upwards, magnet coil 16 will be passed through and the polarity identical direct current of permanent magnet 32, homopolarity phase
Mutually repel, carry out auxiliary piston motion.When permanent magnet 32 moves downward, magnet coil 16 will be passed through and the pole of permanent magnet 32
Property different direct current, heteropole attracts each other, and carrys out auxiliary piston motion.Finally realize that heat engine is run according to setting speed.
If the high-temperature end temperature sensor 7 of heat pipe 5 monitors that temperature is higher, cause the rotating speed of flywheel 14 higher than setting
During rotating speed, situation is opposite with the situation described in claim 5.
As shown in Fig. 2 the flywheel 14 in air heat engine 29 is utilized on conveyer belt 20 and charging device by gearbox 22
Bearing 21 is connected, and cast hopper 19 is fixed with conveyer belt 20, the left and right ends of cast hopper 19 is provided with baffle plate 18, in Far Left
With optoelectronic switch 17 is provided with the bearing of rightmost, be provided with magnetic valve 36 below cast hopper 19, gearbox 22 includes electricity
Magnet clutch 28 and electromagnetism gear shifting actuating mechanism 30.Pass through solar radiation centralized collection device in the right-hand member temperature end of air heat engine 29
23 collect solar radiation, focus it onto on the heat pipe 5 of air heat engine 29, machine power is provided for heat engine, can pass through
The real-time capture solar radiation of adjusting rod 37.
As shown in Figure 2 and Figure 4, when the cast hopper 19 being arranged on conveyer belt 20 is drawn to most by the flywheel 14 in heat engine
During left end, the baffle plate 18 to feed intake on plate 20 will block optoelectronic switch 17, now optoelectronic switch 17 will export a signal to
Controller, coil of the additional power source to electromagnetic clutch stroke actuator, magnetic clutch stroke device executing agency are controlled by controller
28 are separated by attracting between the driving gear and driven gear in electromagnetic attraction gearbox 22, and cast hopper 19 stops fortune
OK, controller is by controlling the length of the coil electricity time of electromagnetic clutch stroke actuator 28 to carry out clutch timing.Work as the time
When reaching setting length, controller controls the additional power source of the coil to electromagnetic clutch stroke actuator will be switched off so that speed change
Engaged between driving gear and driven gear in case 22, power input, while controller additional power source is shifted gears to electromagnetism and performed
The coil of mechanism 30, by control gears slip in the attraction gearbox 22 of electromagnetism, engage or pass through with main story gear
Idler gear is changed, and so as to realize reversion, power output, cast hopper 19 is run to the right.When being arranged on feeding intake on conveyer belt 20
When bucket 19 is drawn to low order end by the flywheel 14 in heat engine, situation and the contrast for running to high order end.
As shown in Figure 2 and Figure 4, magnetic valve 36 is provided with below cast hopper 19, when the leading in conveyer belt 20 of cast hopper 19
Magnetic valve 36 is always on when drawing lower normal operation, and cast hopper 19 normally feeds intake, when being arranged on feeding intake on conveyer belt 20
When bucket 19 is drawn to high order end by the flywheel 14 in heat engine, the baffle plate 18 on plate 20 that feeds intake will block the optoelectronic switch on the left side
17, now optoelectronic switch 17 will export a signal and cause magnetic valve to the additional power source of magnetic valve 36 to controller, controller
Close, cast hopper 19 stops feeding intake, and situation when when cast hopper running to low order end with running to high order end is opposite.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of solar air heat engine charging device based on Electromagnetic Control and speed governing, including air heat engine mechanism and feed intake
Mechanism, the air heat engine mechanism include shift piston, displacement cylinder, working piston, working cylinder and flywheel, working piston
It is connected with shift piston by connecting rod with flywheel, the lower section of flywheel is the working piston and working cylinder, and the right of flywheel is
The shift piston and displacement cylinder, are connected between the working cylinder and displacement cylinder with breather pipe, it is characterised in that：It is described
Working piston bottom is fixed with permanent magnet, and corresponding working cylinder bottom is provided with iron core, electricity is wound with outside the iron core
Electromagnet made of magnetic coil and water pipe, the water pipe are connected by water circulating pump with the water tank；The batch charging mechanism includes
Cast hopper, hopper, support, bar shaped bucket and stand, the both sides of the stand are respectively equipped with bearing, and the minute wheel passes through speed change
Case is connected with being arranged on the bearing of the stand side, is wrapped with conveyer belt between two bearings, the cast hopper is fixed on institute
State on conveyer belt, the both sides of the stand are respectively equipped with optoelectronic switch, and the hopper is fixed on the bracket, the bar shaped bucket
Groove is arranged on the lower section of the hopper.
2. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：The middle part of the cast hopper is provided with baffle plate, and the cast hopper obtains bottom and is provided with magnetic valve.
3. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：The air heat engine mechanism side is provided with solar radiation centralized collection device.
4. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：It is provided with flywheel and surveys rotating speed mark and angle measurement scale designation, double photoelectric door collection photoelectricity gate signal, through microprocessor processes
Afterwards, by rotating speed angular signal terminal transmit the measurement signal of real-time heat engine rotating speed.
5. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：High-temperature end sensor is provided with displacement cylinder right-hand member, left end is provided with low temperature end sensor.
6. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：Be provided with pressure sensor and three signal output terminals in working cylinder bottom, three signal output terminals be respectively rotating speed/
Angular signal, pressure signal, T1/T2 temperature signals.
7. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：There is high-temperature end sensor in heat pipe right-hand member, have low temperature end temperature sensor in heat pipe left end, pass through the two biographies
Sensor, can monitor the temperature in heat pipe in real time, and by T1 T2 temperature signals terminal transmit real-time measurement signal.
8. the solar air heat engine charging device according to claim 1 based on Electromagnetic Control and speed governing, its feature exist
In：Pressure sensor is connected by breather pipe in working cylinder bottom with cylinder, the pressure in cylinder is measured, by base
Pressure signal terminal transmits real-time measurement signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390036.9A CN107410062B (en) | 2017-05-27 | 2017-05-27 | Solar air heat engine feeding device based on electromagnetic control and speed regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390036.9A CN107410062B (en) | 2017-05-27 | 2017-05-27 | Solar air heat engine feeding device based on electromagnetic control and speed regulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107410062A true CN107410062A (en) | 2017-12-01 |
| CN107410062B CN107410062B (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710390036.9A Active CN107410062B (en) | 2017-05-27 | 2017-05-27 | Solar air heat engine feeding device based on electromagnetic control and speed regulation |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186828A (en) * | 2018-08-27 | 2019-01-11 | 四川大学 | Utilize the method for pressure sensor measurement air heat engine torque |
| CN112602609A (en) * | 2020-12-11 | 2021-04-06 | 周勇 | Recovery device of timing pet feeder |
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| CN201018386Y (en) * | 2006-08-25 | 2008-02-06 | 程辉 | Magnetic power machine |
| CN101509437A (en) * | 2009-03-24 | 2009-08-19 | 雷涛 | Highly effective high temperature external combustion engine |
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| CN203735238U (en) * | 2014-02-24 | 2014-07-30 | 三门峡雏鹰农牧有限公司 | Automatic feeding system used in hog house |
| CN106135064A (en) * | 2016-06-30 | 2016-11-23 | 普定县宏峰养殖专业合作社 | A kind of electronic chicken feed automatic release device |
| CN106704125A (en) * | 2016-12-28 | 2017-05-24 | 河海大学常州校区 | Solar photo-thermal engine |
| CN206835876U (en) * | 2017-05-27 | 2018-01-05 | 天津中德应用技术大学 | Solar air heat engine charging device based on Electromagnetic Control and speed governing |
-
2017
- 2017-05-27 CN CN201710390036.9A patent/CN107410062B/en active Active
Patent Citations (8)
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|---|---|---|---|---|
| CN2824425Y (en) * | 2005-07-15 | 2006-10-04 | 罗卫城 | Environment protection energy-saving magnetic engine |
| CN201018386Y (en) * | 2006-08-25 | 2008-02-06 | 程辉 | Magnetic power machine |
| CN101509437A (en) * | 2009-03-24 | 2009-08-19 | 雷涛 | Highly effective high temperature external combustion engine |
| CN203399590U (en) * | 2013-08-02 | 2014-01-22 | 袁万杰 | Full-automatic dung cleaning and rabbit feeding machine |
| CN203735238U (en) * | 2014-02-24 | 2014-07-30 | 三门峡雏鹰农牧有限公司 | Automatic feeding system used in hog house |
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| CN106704125A (en) * | 2016-12-28 | 2017-05-24 | 河海大学常州校区 | Solar photo-thermal engine |
| CN206835876U (en) * | 2017-05-27 | 2018-01-05 | 天津中德应用技术大学 | Solar air heat engine charging device based on Electromagnetic Control and speed governing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186828A (en) * | 2018-08-27 | 2019-01-11 | 四川大学 | Utilize the method for pressure sensor measurement air heat engine torque |
| CN112602609A (en) * | 2020-12-11 | 2021-04-06 | 周勇 | Recovery device of timing pet feeder |
| CN112602609B (en) * | 2020-12-11 | 2022-09-09 | 深圳市海龙电子信息技术有限公司 | Recovery device of timing pet feeder |
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| Publication number | Publication date |
|---|---|
| CN107410062B (en) | 2022-10-25 |
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