CN104719106A - Automatic intermittent moisturizing device - Google Patents
Automatic intermittent moisturizing device Download PDFInfo
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- CN104719106A CN104719106A CN201510134299.4A CN201510134299A CN104719106A CN 104719106 A CN104719106 A CN 104719106A CN 201510134299 A CN201510134299 A CN 201510134299A CN 104719106 A CN104719106 A CN 104719106A
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- moisturizing
- lever
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- water
- valve
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G27/00—Self-acting watering devices, e.g. for flower-pots
- A01G27/02—Self-acting watering devices, e.g. for flower-pots having a water reservoir, the main part thereof being located wholly around or directly beside the growth substrate
Abstract
The invention relates to an automatic intermittent moisturizing device. The automatic intermittent moisturizing device is composed of a container, a lever, a floater, a balance weight, a weak magnet buckle, a water supplementing valve and a moisturizing valve. The container with the top provided with an adjustable evaporation hole contains water, the rest of the components are immersed in the water, the weak magnet buckle is arranged on the water supplementing valve, the function of guaranteeing the moisturizing intermittence is provided for nonlinear force, one end of the lever is directly connected with the water supplementing valve and the moisturizing valve, and the other end of the lever is connected with the floater and the balance weight. The water supplementing valve and the moisturizing valve control a water source to supplement water to the container and moisturize green plants. According to the height of the water level in the container, the floater of the lever is changed, when the liquid is evaporated and buoyancy is reduced to a certain degree, the water supplementing valve and the moisturizing valve are pulled off through the lever, the green plants start to be moisturized, and the original liquid level height of the container is recovered. An electronic device is not used, intermittent moisturizing can be carried out according to the evaporation degree and the habit of the green plants, traditional ceaseless drop irrigation is avoided, and the automatic intermittent moisturizing device can be used for automatic water supplementing and moisturizing of the green plants.
Description
Technical field
The invention belongs to field of machinery automation, relate to a kind of automatics, specifically a kind of can be used for, greenly plants the intermittent water replanishing device watered.
Background technology
Current, green planting with flowers and plants is indoor indispensable ornaments, and it can purify air, and adsorb harmful components is beautified the environment, and more can make that people cultivates one's taste, body and mind loosens.But people are busy with one's work mostly, there is the situation that when often travelling on business trips or be on home leave, flowers are neglected, thus cause green lack of water of planting withered even dead, have impact on the green attractive in appearance and life-span of planting.
For head it off, prior art adopts following several scheme:
The first is for adopting the automatic moisture-keeping system of electronic sensor and electronic controller.The shortcoming of this system is that system equipment is complicated and cost is higher, and electronic sensor exists decision threshold simultaneously, and its sensitivity is linearly discontinuous, there is the risk of erroneous judgement.
The second is the automatic moisture-keeping system being similar to transfusion bottle as shown in Figure 1.The shortcoming of this system is can not the intermittent moisturizing according to plant habit and environmental change, and simultaneously due to the change of environmental temperature and the effect of water tension force, it exists the risk of cutout.
The third is the automatic moisture-keeping system of employing law of connected vessels as shown in Figure 2.The shortcoming of this system is to be easy for hydroponic plant, and for earth culture plant, and system is comparatively complicated and there is idle risk, and this system can not the intermittent moisturizing according to plant habit and environmental change simultaneously.Such as, Authorization Notice No. is in the utility model patent " a kind of automatic watering device " of CN 202890132, it utilizes law of connected vessels to realize automatic moisture-keeping function, but there is the possibility of blocked inefficacy in its perforated metal point, it requires that water source level height plants basin higher than green simultaneously, can not according to the intermittent moisturizing of the environmental factor such as plant habit and evaporation discharge.
To sum up, above three kinds of device existing defects, all can not plant automatic moisture-keeping device as green well.
Summary of the invention
The object of the invention is to the deficiency for above-mentioned existing moisturizing device, propose a kind ofly to plant for green the automatic moisture-keeping device watered, on the basis not using any electronic equipment, to realize the function according to plant habit automatic moisture-keeping, solve people and have no time to water water problem to green planting.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of automatic intermittent moisturizing device, comprises container, lever, float, counterweight, weak magnet are buckled, water compensating valve, moisturizing valve, the adjustable steaming hair engaging aperture can planting habit and evaporation discharge adjustment hole size according to green and lever amplitude limit support;
Described water compensating valve, is placed in container, controls the disconnection of water source and container or is communicated with;
Described moisturizing valve, is placed in container, controls water source and plants the disconnection of pipeline with green or be communicated with;
Described float is connected by lightweight tightrope with counterweight, floats in the water of container, and its buoyancy can change with evaporated quantity of water;
Described lever, is positioned over and is equipped with in the container of water, and its one end is fixedly connected with described lightweight tightrope, and the other end is fixedly connected with described moisturizing valve with described water compensating valve successively;
Described weak magnet button, is fixed on described water compensating valve;
Described adjustable steaming hair engaging aperture, is located at described container top;
Described lever amplitude limit supports, and is extended out by container side wall, is placed in the below of lever near described float and counterweight side.Namely lever amplitude limit props up and is fixed on described container side wall.
On the basis of technique scheme, the present invention can also do following improvement.
The present invention's a kind of automatic intermittent moisturizing device described above, further, described water compensating valve is made up of moisturizing switch moving up and down and the first stationary pipes be fixed in container; Anhydrous and the monosymmetric of bottom is provided with an aperture in described first stationary pipes; Described moisturizing switch comprises first connecting rod and first plugging device of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described first stationary pipes, and described first connecting rod one end is fixedly connected with described lever, and the other end penetrates in described first stationary pipes; Described first plugging device is fixed on the other end of described first connecting rod.Two apertures of the first stationary pipes two bottom sides are communicated with by moisturizing switch or disconnect water source and container.
The present invention's a kind of automatic intermittent moisturizing device described above, further, described weak magnet button is made up of two attracting the first weak magnet and the second weak magnet, and the first weak magnet is fixed on first connecting rod, and the second weak magnet is fixed on described stationary pipes upper end.
The present invention's a kind of automatic intermittent moisturizing device described above, further, the weak magnetic force between described first weak magnet and the second weak magnet presents with the increase of spacing d
the nonlinear decay of formula.
The present invention's a kind of automatic intermittent moisturizing device described above, further, described moisturizing valve is made up of moisturizing switch moving up and down and the second stationary pipes be fixed in container; Anhydrous and the monosymmetric of bottom is provided with an aperture in described second stationary pipes; Described moisturizing switch comprises second connecting rod and second plugging device of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described second stationary pipes, and described second connecting rod one end is fixedly connected with described lever, and the other end penetrates in described second stationary pipes; Described second plugging device is fixed on the other end of described second connecting rod.Two apertures bottom second stationary pipes are communicated with by moisturizing switch or disconnect water source and greenly to plant.
The present invention's a kind of automatic intermittent moisturizing device described above, further, described moisturizing switch, moisturizing switch, lever and float, be all light material and make, and himself gravity is much smaller than other power.
The present invention's a kind of automatic intermittent moisturizing device described above, further, the magnetic force that described weak magnet button, float and counterweight meet weak magnet button when water compensating valve closes produces moment and float buoyancy to lever produces moment sum to lever and should be greater than counterweight and produce moment to lever; After evaporation, water compensating valve opens moisturizing and moisturizing valve when opening moisturizing, and float buoyancy produces moment to lever and should be less than counterweight and produce moment to lever.
The present invention is compared with existing automatic moisture-keeping device, and tool of the present invention has the following advantages:
1) automatic moisture-keeping device of the present invention controls evaporation discharge by adjustable steaming hair engaging aperture, and this evaporation discharge affects whole system because affecting the buoyancy of float, and thus the present invention can carry out moisturizing moisturizing according to green evaporation degree of planting.
2) automatic moisture-keeping device of the present invention introduces nonlinear magnetic force as the switch having threshold value, take full advantage of the feature of holding power simultaneously, make system have hysteresis, thus the present invention can carry out intermittent moisturizing moisturizing, more meet plant habit, avoid traditional continuation moisturizing.
3) automatic moisture-keeping device of the present invention achieves without electricity full-automatic, can complete automatic moisture-keeping water supplement function, change continuously linear, limits thus reliability higher without judgement precision.
4) automatic moisture-keeping device of the present invention can utilize defective work to manufacture, environmental protection and cost-saving.
Accompanying drawing explanation
Fig. 1 is the automatic moisture-keeping system construction drawing being similar to transfusion bottle;
Fig. 2 is the automatic moisture-keeping system construction drawing adopting law of connected vessels;
Fig. 3 is automatic moisture-keeping structure drawing of device of the present invention;
Fig. 4 is the water compensating valve 6 of automatic moisture-keeping device of the present invention, moisturizing valve 7 and weak magnet button 5 structure chart;
Fig. 5 is automatic moisture-keeping device moisturizing procedure chart of the present invention;
Fig. 6 is the lever 2 force analysis figure of automatic moisture-keeping device of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, container, 2, lever, 3, float, 4, counterweight, 5, weak magnet button, 6, water compensating valve, 61 moisturizing switches, the 62, first stationary pipes, two apertures of the 621, first stationary pipes two bottom sides, 7, moisturizing valve, 71, moisturizing switch, the 72, second stationary pipes, 721, two apertures of the second stationary pipes two bottom sides, 8, adjustable steaming hair engaging aperture, 9, lever amplitude limit supports, 10, liquid level, 11, connect water pipeline, 12, connect and greenly plant pipeline.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 3, automatic moisture-keeping device of the present invention, comprises container 1, lever 2, float 3, counterweight 4, weak magnet buckles 5, water compensating valve 6, moisturizing valve 7, adjustable steaming hair engaging aperture 8 and lever amplitude limit support 9.
Described container 1 plays water storage for natural evaporation, and the present embodiment is selected but is not limited to the waste and old cuboid fish jar of employing one.
Described adjustable steaming hair engaging aperture 8 works to control evaporation discharge needs water habit to conform to plant, is located at container 1 top, and selecting in the present embodiment but being not limited to employing one has the brown colored plastic plate of adjustable port to regulate the size of adjustable steaming hair engaging aperture 8.
Described lever 2 is central for lightweight lever is placed in container 1, himself gravity can be ignored, automatically can rotate within the specific limits, be rotated clockwise by static position, open water compensating valve 6 and moisturizing valve 7, rotate counterclockwise to static position that then water compensating valve 6 and moisturizing valve 7 are closed.
Described float 3 plays the effect of perception container 1 evaporation discharge, and be connected with lever 2 side A point with tightrope, float in the water in container 1, in automatic moisture-keeping process, its position is substantially motionless.Himself gravity can be ignored compared to its buoyancy.In the present embodiment, select but be not limited to a lightweight cuboid hollow plastic magazine.
Described counterweight 4 is placed in the water in container 1, and be connected with A point on the right side of lever 2 with tightrope, himself buoyancy can be ignored compared to its gravity.
Described lever amplitude limit supports 9 to be played moisturizing limit lever 2 and continues to rotate clockwise, and to ensure that buoyancy too much can not increase because float 3 moves downward, it is drawn by the front and back sides of container 1, A point below about 1cm on the right side of lever 2 when being positioned at static state.
With reference to Fig. 4, described water compensating valve 6 plays a part as container 1 controls the rear moisturizing of evaporation, and described water compensating valve is made up of moisturizing switch moving up and down and the first stationary pipes be fixed in container; Anhydrous and the monosymmetric of bottom is provided with an aperture, i.e. two apertures 621 of the first stationary pipes two bottom sides in described first stationary pipes; Described moisturizing switch comprises first connecting rod 611 and first plugging device 612 of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described first stationary pipes, described first connecting rod one end is fixedly connected with described lever, and the other end penetrates in described first stationary pipes; Described first plugging device is fixed on the other end of described first connecting rod.Two apertures of the first stationary pipes two bottom sides are communicated with by moisturizing switch or disconnect water source and container.Moisturizing switch 61 quality is light to ignoring, and to be positioned at below lever 2 and to be directly connected with the left side of lever 2, controlling the connection of water source and container 1; On the left of lever 2 upwards then moisturizing switch 61 upwards, symmetrically arranged two holes bottom stationary pipes 62 can be connected, and namely water source is connected with container 1, be evaporation after container 1 moisturizing; Return to downwards on the left of lever 2 static position then moisturizing switch 61 end of down to, the hole, left and right plugged bottom stationary pipes 62 connects, namely the connection of water source and container 1 has been interrupted, simultaneously moisturizing switch 61 can be the variable holding power provided on the left of lever 2 upwards, prevents lever 2 to be rotated counterclockwise further.In the present embodiment, water source is selected but is not limited to running water.
With reference to Fig. 4, described weak magnet button 5 rises as non-linear force control unit and controls intermittent moisture-keeping function, similar to the magnetic clasp principle of daily suitcase, and be made up of two attracting weak magnet 51 and 52,51 are placed on moisturizing switch 61, and 52 are placed in stationary pipes 62.Rule of thumb with practice analysis, the weak magnetic force between 51 and 52 presents with the increase of spacing d substantially
the nonlinear decay of formula, can think that weak magnet power is negligible after magnet pulls open more original spacing.In the present embodiment, select but be not limited to the magnetic clasp adopting daily suitcase.
With reference to Fig. 4,7, described moisturizing valve is the green moisture-keeping function that waters of planting, and described moisturizing valve is made up of moisturizing switch moving up and down and the second stationary pipes be fixed in container; Anhydrous and the monosymmetric of bottom is provided with an aperture, i.e. two apertures 721 of the second stationary pipes two bottom sides in described second stationary pipes; Described moisturizing switch comprises second connecting rod 711 and second plugging device 712 of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described second stationary pipes, described second connecting rod one end is fixedly connected with described lever, and the other end penetrates in described second stationary pipes; Described second plugging device is fixed on the other end of described second connecting rod.Two apertures bottom second stationary pipes are communicated with by moisturizing switch or disconnect water source and greenly to plant; Moisturizing switch 71 quality is light to ignoring, and to be positioned at below lever 2 and to be directly connected with the left side of lever 2, control water source with by the green connection of planting of moisturizing; On the left of lever 2 upwards then moisturizing switch 71 upwards, the hole, left and right bottom stationary pipes 72 can be connected, and namely water source is connected with by green the planting of moisturizing, plants intermittent moisturizing for green; Return to downwards on the left of lever 2 static position then moisturizing switch 71 end of down to, the hole, left and right plugged bottom stationary pipes 72 connects, namely interrupted water source with by the green connection of planting of moisturizing, simultaneously moisturizing switch 71 can be the variable holding power provided on the left of lever 2 upwards, prevents lever 2 to be rotated counterclockwise further.In the present embodiment, water source is selected but is not limited to running water.
During static position, described weak magnet button 5 magnetic force produces moment and described float 3 buoyancy to lever 2 and produces moment sum to lever 2 and should be greater than described counterweight 4 pairs of levers 2 and produce moment; After evaporation during replenishing water and preserving moisture, described float 3 buoyancy produces moment to lever 2 and should be less than described counterweight 4 pairs of levers 2 and produce moment.
Working method and principle, with reference to Fig. 5 and Fig. 6, first retaining in container 1 during work, float 3 floats in water and large portion is dipped in water, and counterweight 4 is dipped in water all the time, and water compensating valve 6 and moisturizing valve 7 are all closed, weak magnet button 5 is also near attracting, now as shown in Figure 5 a, force analysis as the step of Fig. 6 a) shown in, lever 2 by float 3 to right side A point buoyancy F upwards
f, by counterweight 4 to the downward tensile force f of right side A point
g, by weak magnet button 5 to the downward magnetic force F in left side
b, common to left side holding power F upwards by moisturizing switch 61 and moisturizing switch 71
n.Wherein, buoyancy F
frelevant with the volume that float 3 arranges water, namely relevant with liquid level on the motionless basis of float 3.Above-mentioned four force squares and be 0, therefore system in balance is motionless.
After according to plant habit adjustment adjustable steaming hair engaging aperture 8 size, the water in container 1 starts evaporation, and liquid level starts to decline, now buoyancy F
fdiminish, tensile force f
gwith magnetic force F
bconstant, holding power F
nthen with buoyancy F
fdiminish same magnitude.Therefore the moment of lever 2 and be still 0, system still keeps balance motionless.
As shown in Figure 5 b, in container 1, water continues evaporation, makes buoyancy F
fcontinue to be reduced to holding power F
nbe 0, now for opening critical point, lever 2 moment and be always 0 before this, namely system remains that balance is motionless, and force analysis is as the step b of Fig. 6) shown in.After this, due to holding power F
ndisappear and continue to evaporate and buoyancy F
freduce, lever 2 moment and be clockwise direction and rotating clockwise, the first weak magnet 51 and the second weak magnet 52 are opened, the weak magnetic force F between them
bincrease substantially with its spacing d presents
rapidly decaying to of formula can be ignored, thus system lever 2 moment be always clockwise direction until with lever amplitude limit support 9 contact after produce A point holding power F ' upwards
n, the step c as Fig. 5 c and Fig. 6) shown in, now lever 2 dextrorotation goes to and supports 9 with lever amplitude limit and contact, and by float 3 to right side A point buoyancy F upwards
f, by counterweight 4 to the downward tensile force f of right side A point
g, support 9 to right side A point holding power F ' upwards by lever amplitude limit
n, system moment and be 0, water compensating valve 6 and moisturizing valve 7 are opened, and wet respectively to container 1 moisturizing and green plant protection.
Carry out moisturizing to container 1 afterwards along with water compensating valve 6 pulls open, in container 1, liquid level rises fast, float 3 provide to buoyancy F
fincrease gradually, and meanwhile lever amplitude limit supports the 9 upwards holding power F ' provided
nreduce same magnitude, make lever 2 moment and be always 0, system held replenishing water and preserving moisture state, container 1 moisturizing is wet to green plant protection.
As fig 5d, water compensating valve 6 and moisturizing valve 7 continue to be opened, and in container 1, liquid level continues to raise, the buoyancy F that float 3 provides
fcontinue to increase to lever amplitude limit and the 9 holding power F ' provided are provided
nbe reduced to 0, now for closing critical point, lever 2 moment and be always 0 before this, namely system keeps replenishing water and preserving moisture state, and force analysis is as the steps d of Fig. 6) shown in.After this, due to holding power F '
ndisappear and continue moisturizing and buoyancy F
fincrease, lever 2 moment and for counterclockwise rotating counterclockwise, the first weak magnet 51 is mutually close with the second weak magnet 52, the weak magnetic force F between them
breduction substantially with its spacing d presents
the quick increase of formula, therefore system lever 2 moment and being always counterclockwise until moisturizing switch 61 and moisturizing switch 71 are closed and to providing the F of holding power upwards on the left of lever
n, as Fig. 5 a and Fig. 6 step a) shown in, after this to container 1 moisturizing with greenly plant intermittent moisturizing and terminate.
So far, this device completes a moisturizing process.After this, system will uninterruptedly circulate in above process.Because the effect of nonlinear weak magnet power and holding power makes device achieve intermittent moisturizing, the mode moisturizing can not dripped with conventional persistence.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. an automatic intermittent moisturizing device, it is characterized in that, comprise container (1), lever (2), float (3), counterweight (4), weak magnet buckle (5), water compensating valve (6), moisturizing valve (7), the adjustable steaming hair engaging aperture (8) can planting habit and evaporation discharge adjustment hole size according to green and lever amplitude limit support (9);
Described water compensating valve (6), is placed in container (1), controls the disconnection of water source and container (1) or is communicated with;
Described moisturizing valve (7), is placed in container (1), controls water source and plants the disconnection of pipeline with green or be communicated with;
Described float (3) is connected by lightweight tightrope with counterweight (4), floats in the water of container (1), and the buoyancy of float can change with evaporated quantity of water;
Described lever (2), be positioned in the container (1) that water is housed, its one end is fixedly connected with described lightweight tightrope, and the other end is fixedly connected with described moisturizing valve (7) with described water compensating valve (6) successively;
Described weak magnet button (5), is fixed on described water compensating valve (6);
Described adjustable steaming hair engaging aperture (8), is located at described container (1) top;
Described lever amplitude limit supports (9), is extended by container (1) sidewall, is placed in the below of the close described float of lever (2) and counterweight side.
2. a kind of automatic intermittent moisturizing device according to claim 1, it is characterized in that, described water compensating valve (6) is made up of moisturizing switch (61) moving up and down and the first stationary pipes (62) be fixed in container (1); Anhydrous and the monosymmetric of bottom is provided with an aperture in described first stationary pipes (62); Described moisturizing switch (61) comprises first connecting rod and first plugging device of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described first stationary pipes, described first connecting rod one end is fixedly connected with described lever, and the other end penetrates in described first stationary pipes; Described first plugging device is fixed on the other end of described first connecting rod.
3. a kind of automatic intermittent moisturizing device according to claim 2, it is characterized in that, described weak magnet button (5) is made up of two attracting the first weak magnet (51) and the second weak magnet (52), first weak magnet (51) is fixed on first connecting rod, and the second weak magnet (52) is fixed on described stationary pipes (62) upper end.
4. a kind of automatic intermittent moisturizing device according to claim 3, it is characterized in that, the weak magnetic force between described first weak magnet (51) and the second weak magnet (52) presents with the increase of spacing d
the nonlinear decay of formula.
5. a kind of automatic intermittent moisturizing device according to any one of Claims 1-4, it is characterized in that, described moisturizing valve (7) is made up of moisturizing switch (71) moving up and down and the second stationary pipes (62) be fixed in container (1); Anhydrous and the monosymmetric of bottom is provided with an aperture in described second stationary pipes (72); Described moisturizing switch (61) comprises second connecting rod and second plugging device of the symmetrically arranged aperture of two bottom sides that can disconnect or be communicated with described second stationary pipes, described second connecting rod one end is fixedly connected with described lever, and the other end penetrates in described second stationary pipes; Described second plugging device is fixed on the other end of described second connecting rod.
6. a kind of automatic intermittent moisturizing device according to claim 5, it is characterized in that, described moisturizing switch (61), moisturizing switch (71), lever (2) and float (3), be all light material to make, himself gravity is much smaller than other power.
7. a kind of automatic intermittent moisturizing device according to Claims 1-4 or 6 any one, it is characterized in that, described weak magnet button (5), float (3) and counterweight (4) meet water compensating valve (6) closed time weak magnet button (5) the magnetic force buoyancy that lever (2) produced to moment and float (3) moment sum is produced to lever (2) counterweight (4) should be greater than moment is produced to lever (2); After evaporation, water compensating valve (6) opens moisturizing and moisturizing valve when opening moisturizing, and float (3) buoyancy produces moment to lever (2) and should be less than counterweight (4) and produce moment to lever (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510134299.4A CN104719106B (en) | 2015-03-25 | 2015-03-25 | A kind of automatic intermittent moisturizing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134299.4A CN104719106B (en) | 2015-03-25 | 2015-03-25 | A kind of automatic intermittent moisturizing device |
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| CN104719106A true CN104719106A (en) | 2015-06-24 |
| CN104719106B CN104719106B (en) | 2016-08-17 |
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| CN201510134299.4A Expired - Fee Related CN104719106B (en) | 2015-03-25 | 2015-03-25 | A kind of automatic intermittent moisturizing device |
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| CN106258560B (en) * | 2016-08-06 | 2019-10-18 | 泉州市宕存工业设计有限公司 | A kind of intelligent flowerpot of automatic continuous water |
| CN107821128A (en) * | 2017-12-04 | 2018-03-23 | 安徽理工大学 | One kind interlocks lever circular cone spoke shaft type and mends drainage arrangement |
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| CN104719106B (en) | 2016-08-17 |
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