CN212994019U - Square wave type ultrasonic mite removing device - Google Patents
Square wave type ultrasonic mite removing device Download PDFInfo
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- CN212994019U CN212994019U CN202021788275.3U CN202021788275U CN212994019U CN 212994019 U CN212994019 U CN 212994019U CN 202021788275 U CN202021788275 U CN 202021788275U CN 212994019 U CN212994019 U CN 212994019U
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Abstract
The application discloses mite device is removed to square wave formula supersound relates to the technical field that the mite was removed to the bee colony, has improved the drawback that the medicine removed the mite, and it includes the casing and sets up and removes the mite unit in the casing, casing side surface has the launch site, set up densely covered through-hole in the launch site, remove the mite unit and include from the casing inside to the launch site direction set gradually: a coil for generating a magnetic field; an ultrasonic generator for generating ultrasonic waves; and an anion generator for generating anions; the ultrasonic wave generated by the ultrasonic generator is transmitted outwards through the through hole, the negative ions generated by the negative ion generator are positioned in the magnetic field generated by the coil, and meanwhile, the magnetic field force of the magnetic field drives the negative ions to be ejected outwards through the through hole; the ultrasonic signal released by the ultrasonic generator is a square wave signal. The application realizes the hitting of the bee mites through the electric shock of the bee mites, and finally achieves the effect of removing the mites without medicines.
Description
Technical Field
The application relates to the technical field of mite removal of bee colonies, in particular to a square wave type ultrasonic mite removal device.
Background
The honeybees are raised in the beehive in the breeding process so as to be convenient for centralized management of the honeybees and convenient for collection of the honeybees.
In the process of bee keeping, the mite damage of bee colony is a long-lasting problem in the bee keeping industry. Bee mites, as ectoparasites parasitizing on bees, can absorb hemolymph of the bees, which causes the shortening of the life span and the reduction of the collecting capacity of the bees, and in severe cases, the death of the bees leads to the weakening of the colony vigor. Therefore, the removal work of bee mites is always a very important part of the bee keeping process.
At present, medicines are mostly adopted in the bee-keeping industry for killing mites, but the medicines are adopted for removing the mites, so that the mites are easily and improperly controlled to poison the bee larva spleens, and chemical component residues can influence the quality of honey; the long-term use process can also improve the drug resistance of the bee mites, which leads to the reduction of the mite killing effect. Therefore, the difficulty and pain point of bee-keeping industry are always how to remove mites on bee colonies.
SUMMERY OF THE UTILITY MODEL
In order to improve the drawback that the medicine removed the mite, this application provides a square wave formula supersound removes mite device.
The application provides a square wave formula supersound removes mite device adopts following technical scheme:
the utility model provides a mite device is removed to square wave formula supersound, includes the casing and sets up and remove the mite unit in the casing, casing side surface has the launch site, set up densely covered through-hole in the launch site, remove the mite unit and include from the casing inside to launch site direction set gradually:
a coil for generating a magnetic field;
an ultrasonic generator for generating ultrasonic waves; and
an anion generator for generating anions;
the ultrasonic wave generated by the ultrasonic generator is transmitted outwards through the through hole, the negative ions generated by the negative ion generator are positioned in the magnetic field generated by the coil, and meanwhile, the magnetic field force of the magnetic field drives the negative ions to be ejected outwards through the through hole; the ultrasonic signal released by the ultrasonic generator is a square wave signal.
By adopting the technical scheme, the applicant finds that negative ions can have a good inhibition effect on bee mites in practical application; the magnetic field generated by the coil can drive the negative ions to be ejected towards the through hole, so that the negative ions are not decreased progressively in concentration gradient and can be conveyed farther; the ultrasonic wave can drive bee mite, drives bee mite to the bee way on, makes the anion remove the mite better.
Preferably, the negative ion generator includes a plurality of negative ion emitting heads, and all the negative ion emitting heads are circumferentially arranged at a central point and emit negative ions toward the central point.
Through adopting above-mentioned technical scheme, the anion emission head that arranges with a central point can assemble the anion of transmission, can launch better under the effect of electromagnetic field.
Preferably, a circuit control board electrically connected with the coil, the ultrasonic generator and the anion generator is arranged in the shell, the circuit control board controls the coil, the ultrasonic generator and the anion generator to be opened and closed simultaneously, and the circuit control board is provided with a mounting hole for circumferentially mounting the anion emitting head.
Through adopting above-mentioned technical scheme, can be convenient for the installation of anion emission head.
Preferably, each negative ion emitting head has an electric brush head for releasing negative ions, and each electric brush head releases negative ions at a concentration of at least 100 ten thousand per cubic centimeter.
By adopting the technical scheme, the concentration of the negative ions released by the negative ion emitting head is set to be at least 100 ten thousand per cubic centimeter, and enough negative ions can be supplied, so that the mite dropping efficiency is higher.
Preferably, the frequency of the ultrasonic waves released by the ultrasonic wave generator is between 20kHz and 60 kHz.
By adopting the technical scheme, the applicant finds that the ultrasonic frequency under the frequency has good dispelling effect on bee mites.
Preferably, the frequency of the magnetic field is between 1kHz and 10 kHz.
By adopting the technical scheme, the magnetic field adopts the magnetic field with high-frequency change, so that the bees are not influenced by the magnetic field as if people are noninductive in electromagnetic waves of mobile phone signals, and negative ions can be sprayed out under the action of the magnetic field force; the high-frequency change magnetic field can do work on electrons more stably, so that the electrons can be released better.
Preferably, the shell is further provided with an indicator light electrically connected with the circuit control board.
Through adopting above-mentioned technical scheme, can conveniently observe and remove mite appearance and whether be in operation.
Preferably, a power supply unit electrically connected with the circuit control board is further arranged in the shell, and the power supply unit is an external power supply or a battery arranged in the shell.
By adopting the technical scheme, the external power supply can continuously supply power, so that the long-term use of the power supply is ensured; the battery enables the application to be used in unpowered open or suburban areas.
In summary, the present application includes at least one of the following benefits:
1. negative ions are generated by the negative ion generator, positive ions can be carried by bees due to friction after honey collection is completed, and static electricity can be generated by the combination of the negative ions and the positive ions, so that bee mites are knocked off from the bees, and drug-free mite removal is realized;
2. the ultrasonic wave is generated by the ultrasonic generator, bee mites generate an evasion phenomenon under the influence of the ultrasonic wave and climb in the honeycomb in a mess manner, so that the bee mites in the deep part of the honeycomb can be driven to a bee nest, and the bee mites can be knocked down by negative ions conveniently;
3. the magnetic field is generated through the coil, and the magnetic field can better send out the produced negative ions, so that the concentration of the negative ions cannot be linearly weakened, and a farther range can be radiated.
Drawings
FIG. 1 is a schematic view of the overall structure of the mite removing device in this embodiment;
FIG. 2 is an exploded view of the mite removing apparatus according to the present embodiment;
FIG. 3 is an exploded view of the mite removing unit according to the present embodiment;
FIG. 4 is a diagram of the force and motion trajectory of the negative ion particles in the magnetic field in this embodiment;
FIG. 5 is a sectional view on the bee space when the mite removing device is arranged inside the beehive in the embodiment;
fig. 6 is an enlarged view at a in fig. 5.
Description of reference numerals: 1. a housing; 11. a top shell; 12. a bottom case; 121. a through hole; 2. a mite removing unit; 211. a negative ion emitting head; 212. an electric brush head; 22. an ultrasonic generator; 23. a coil; 3. a circuit control board; 31. mounting holes; 32. an indicator light; 4. a power supply unit; 6. a mite removing device; 7. bee mites; 8. a bee is provided.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses mite device is removed to square wave formula supersound through using getting rid of anion and ultrasonic wave realization bee mite. Referring to fig. 1 and 2, the mite removing device includes a housing 1, at least one mite removing unit 2, a circuit control board 3, and a power supply unit 4.
The casing 1 is formed by butt joint of a bottom shell 12 and a top shell 11, an emitting area is arranged on the bottom shell 12, and through holes 121 are densely distributed in the emitting area.
Referring to fig. 2 and 3, the mite removing unit 2 is disposed in the housing 1, and specifically includes a negative ion emitting head 211 for generating negative ions, an ultrasonic generator 22 for generating ultrasonic waves, and a coil 23 for generating a magnetic field.
Referring to fig. 3 and 4, ultrasonic wave and anion are all outwards transmitted through-hole 121, and wherein the ultrasonic wave can make a round trip to reflect and then transmit to the depths of honeycomb inside the beehive, and bee mite hears on the ultrasonic wave can produce the evasion phenomenon and climb out to the bee way, magnetic field with the anion send to the bee way on the electric shock bee mite thereby hit down bee mite.
Specifically, the anion emission heads 211 are provided in plural, each anion emission head 211 has one brush head 212 for releasing anions, and the brush heads 212 of all the anion emission heads 211 are arranged circumferentially at a center point and emit anions toward the center.
The coil 23 is arranged at the back of the ultrasonic generator 22, and after the coil 23 is electrified to generate a magnetic field, negative ions are accelerated to be ejected out of the through hole 121 in a parabolic scattering mode under the action of the magnetic field force, and can be better conveyed to various positions of the beehive.
The circuit control board 3 is also arranged in the shell 1 and is electrically connected with the anion emission head 211, the ultrasonic generator 22 and the coil 23, the circuit control board 3 controls the anion emission head 211, the ultrasonic generator 22 and the coil 23 to be opened and closed simultaneously, and meanwhile, the circuit control board 3 is provided with a mounting hole 31 for the anion emission head 211 to be mounted circumferentially.
Thereby circuit control board 3 and power supply unit 4 electric connection realize removing the power supply of mite device, power supply unit 4 sets up to external power supply in this embodiment, and power supply unit 4 can also be continuity power supplies such as battery, solar cell panel in other embodiments. Meanwhile, the circuit control board 3 is also electrically connected with a setting indicator lamp 32, and the indicator lamp 32 is also turned on and off simultaneously with the anion generator 21.
In order to verify the mite removing effect of the mite removing device of the present application, the applicant performed the following experiments:
selecting ten beehives with similar bee colony situation in a bee field, recording as a beehive I, a beehive II … … beehive ninth and a beehive ten, and selecting and observing about 30% of bee mite parasitic rate in each beehive by an applicant before an experiment, wherein the bee mite parasitic rate is the number of bees with mites/the total number of detected bees.
Wherein:
two mite removing devices are arranged in the first beehive and the second beehive, meanwhile, the anion generator 21 of the mite removing unit 2 in each mite removing device is provided with four anion emitting heads 211, the concentration of anions released by the electric brush heads 212 of each anion emitting head 211 is about 500 ten thousand per cubic centimeter, the ultrasonic frequency is about 40kHz, and the magnetic field frequency is about 5 kHz.
And the third beehive and the fourth beehive are used for removing mites through a No. 1 miticide, the miticide is mixed with water to prepare a liquid medicine, the liquid medicine is filled into a sprayer after being fully stirred, and then the liquid medicine is uniformly sprayed on bee bodies of honeycomb spleens, so that the bee mites are poisoned and fall off the bee bodies in about 30 minutes.
And the fifth beehive and the sixth beehive are subjected to mite killing by a No. 2 mite killing paper smoke agent, after the bees return to the nest at evening, a nest door is tightly closed, a box cover is opened to ignite one corner of the medicine bag, the medicine bag is rapidly placed into the box, the box cover is tightly closed, after smoking is carried out for 15-20 minutes, the nest door is opened, and residual ash is taken out.
The seventh beehive and the eighth beehive fix the mite-killing sheets between the bee ways through the thumbtack to continuously remove the mites.
And 4, carrying out no mite removal treatment on the ninth beehive and the tenth beehive until the bee brood spleens are hatched, and then observing.
In addition, a flat plate is laid at the bottom of each beehive, single-sided glue is arranged on the flat plate, and one side of the single-sided glue faces upwards so as to facilitate mite collection observation.
Because the time that different mite modes of removing took effect is different, especially the mite tablet need use for a long time just can play better curative effect, so time does not regard as specific consideration element in the experiment, only compares with the son spleen hatchability and bee mite parasitic rate when the son spleen is complete hatching after removing the mite, also can assist and compare the mite effect of removing through observing the collection mite volume on the single face glue simultaneously. The hatching rate of the neutron spleen is the hatching number of the young bees/the total number of the capped young bees.
Table 1 comparison of the parasitic rate of bee mites, brood spleen hatching rate and mite collection amount after mite removal of each beehive:
| beehive | Parasitic rate of bee mites (%) | Hatching rate of spleen (%) | Mite-collecting amount |
| Beehive 1 | 3.2％ | 98.7％ | Dense packing |
| Beehive II | 2.5％ | 98.6％ | Dense packing |
| Beehive III | 0.3％ | 77.6％ | Is extremely dense |
| Beehive four | 0％ | 67.3％ | Is extremely dense |
| Beehive five | 0.8％ | 82.3％ | Dense packing |
| Six beehives | 1.2％ | 85.7％ | Dense packing |
| Seven beehives | 1.4％ | 92.6％ | Dense packing |
| Eight beehives | 2.1％ | 91.2％ | Dense packing |
| Nine beehives | 39％ | 57.2％ | / |
| Beehive ten | 36％ | 55.3％ | / |
After the experiment, the applicant finds that the mite removing device has the function of removing mites, and the applicant finds that most of bee mites adhered to the single-sided glue are alive mites. The applicant believes that although the mite killing efficiency of the mite killing device is somewhat lower than that of some medicament mite killing means, the effect of the mite killing device on the bees is also low, especially the brood spleens of the bees are nearly unaffected, so that the hatching rate of the brood spleens of the bees can be maintained at a high level.
With reference to fig. 5 and 6, the applicant believes that the principle of implementation of the mite removing device may be as follows:
as the surface of the bee 8 is provided with fine villi, in the outgoing honey collection process of the bee 8, the high-frequency stretching and contraction of the pectoralis muscle of the bee 8 flies in a way of vibrating 160 and 240 wings per second, and high-speed friction is generated with air while energy is consumed, so that positive charges on electrons are lost.
After the honey collection of the bees 8 is finished, the negative ions are emitted due to the magnetic field, the negative ions are combined with oxygen in the air to form negative oxygen ions, the other part of the negative ions directly exist in an independent body of electrons, and the negative oxygen ions and the electrons can be combined with positive charges on the bees 8 to generate potential voltage, so that current is generated on the body surfaces and the bodies of the bees 8. Because the bee mites 7 are small in size and low in tolerance to current, the bee mites 7 are shocked by electricity to stun or attack numb, so that the bee mites cannot be attached to the body surfaces of the bees 8 to knock down the bee mites 7. The bee mites 7 are not killed directly, but hit the bottom of the hive 5, so most of the mites are live mites seen on the single-sided glue. The body type of the bee 8 is larger than that of the bee mite 7, and the current cannot influence the bee 8.
Simultaneously because bee mite 7 does not tolerate the ultrasonic wave, bee mite 7 can crawl everywhere under the influence of ultrasonic wave, and then climbs out to the bee way and look for honeybee 8 parasitism from the depths of honeycomb. When the bee mites 7 pierce chitin or tunica between the bees 8 and want to absorb hemolymph in the bee 8 body, pressure difference is generated between the bee 8 body surface and the body, so that electric current is generated to knock down the bee mites 7. In addition, the sound of the bee 8 can only be heard within 440Hz, so the bee is not sensitive to high-frequency ultrasonic waves and cannot be influenced by the ultrasonic waves.
To further verify the effect of ultrasonic frequency on bee mites 7.
The applicant also selected a plurality of beehives 5 of the same bee field for verification and adjusted the ultrasonic frequency, and the bee mite parasitism rate of each beehive 5 is about 30% before the experiment is started.
The first embodiment is as follows:
the number of the mite removing units 2 is two, each mite removing unit 2 is provided with four negative ion emitting heads 211, the concentration of negative ions released by electric brush heads 212 of each negative ion emitting head 211 is about 500 ten thousand per cubic centimeter, the frequency of ultrasonic waves is set to be about 20kHz, the frequency of a magnetic field is set to be about 5kHz, and the mite removing time is set to be 24 hours.
Example two:
the difference from the first embodiment is that the ultrasonic frequency is set to about 25 kHz.
Example three:
the difference from the first embodiment is that the ultrasonic frequency is set to about 30 kHz.
Example four:
the difference from the first embodiment is that the ultrasonic frequency is set to about 34 kHz.
Example five:
the difference from the first embodiment is that the ultrasonic frequency is set to about 37 kHz.
Example six:
the difference from the first embodiment is that the ultrasonic frequency is set to about 40 kHz.
Example seven:
the difference from the first embodiment is that the ultrasonic frequency is set to about 45 kHz.
Example eight:
the difference from the first embodiment is that the ultrasonic frequency is set to about 50 kHz.
Example nine:
the difference from the first embodiment is that the ultrasonic frequency is set to about 60 kHz.
Comparative example one:
the difference from the first embodiment is that the ultrasonic frequency is set to about 10 kHz.
Comparative example two:
the difference from the first embodiment is that the ultrasonic frequency is set to about 15 kHz.
Comparative example three:
the difference from the first embodiment is that the ultrasonic frequency is set to about 65 kHz.
Comparative example four:
the difference from the first embodiment is that the ultrasonic frequency is set to about 70 kHz.
Comparative example five:
the difference from the first embodiment is that the ultrasonic generator 22 is not provided.
And (3) performance detection:
bee mite parasitism rate tests were carried out on the first to ninth examples and the first to fifth comparative examples, and the test results are shown in the table:
table 2 examples one to nine and bee mite infestation rate measurements of comparative examples one to five:
| testing | Parasitic rate of bee mites (%) |
| Example one | 3.7％ |
| Example two | 3.7％ |
| EXAMPLE III | 2.6％ |
| Example four | 2.7％ |
| EXAMPLE five | 3.5％ |
| EXAMPLE six | 2.5％ |
| EXAMPLE seven | 2.9％ |
| Example eight | 2.2％ |
| Example nine | 4.6％ |
| Comparative example 1 | 9.7％ |
| Comparative example No. two | 8.6％ |
| Comparative example No. three | 7.9％ |
| Comparative example No. four | 8.2％ |
| Comparative example five | 10.2％ |
As can be seen from the table, in the first to ninth examples, the mite removing efficiency of the mite removing device was better than that of the first to fifth comparative examples, and the applicant provided a camera in the beehive and observed that no abnormality occurred in the behavior of the bees in each beehive.
The applicant believes that the reason why bee mite 7 does not tolerate ultrasonic frequencies of 20kHz to 60kHz may be as follows: the ultrasonic frequency of 20kHz-60kHz is the ultrasonic frequency band used for positioning by the bats, most nocturnal insects can evolve a special auditory organ for avoiding the predation of the bats and can capture the ultrasonic wave of the frequency band, although the bee mites 7 are not the insects predated by the bats, the bee mites 7 also have the auditory organ capable of hearing the frequency band, and therefore the bee mites 7 can generate an approach phenomenon after hearing the ultrasonic wave of the frequency band so as to climb around, namely climb out from the deep part of the honeycomb to arrive at the bee road and further be more easily attacked by negative ions.
Meanwhile, the applicant observes the phenomenon of mite dropping and finds that different bee mites have certain difference in sensitivity to ultrasonic waves of different frequency bands, for example, the parasitic rate of the small bee mites is lower when the frequency bands are 30kHz and 34kHz, and the proportion of the small bee mites is higher when the frequency bands are dropped; at 40kHz and 50kHz, the parasitism rate of varroa jacobsoni is lower, and the proportion of varroa jacobsoni is higher when the varroa jacobsoni falls.
Therefore, to further verify the better mite killing effect of the mite killing device, the applicant further performs the following setting: example ten:
the number of the mite removing units 2 is two, each mite removing unit 2 is provided with four negative ion emitting heads 211, the concentration of negative ions released by electric brush heads 212 of each negative ion emitting head 211 is 500 ten thousand per cubic centimeter, the frequency of a magnetic field is 5kHz, the frequencies of ultrasonic generators 22 in the two mite removing units 2 are respectively set to be 30kHz and 40kHz, and the mite removing time is set to be 24 hours.
Example eleven:
the difference from the tenth embodiment is that the frequencies of the ultrasonic generators 22 in the two mite removing units 2 are set to 30kHz and 50kHz, respectively.
Example twelve:
the difference from the tenth embodiment is that the frequencies of the ultrasonic generators 22 in the two mite removing units 2 are set to 34kHz and 40kHz, respectively.
Example thirteen:
the difference from the tenth embodiment is that the frequencies of the ultrasonic generators 22 in the two mite removing units 2 are set to 34kHz and 50kHz, respectively.
And (3) performance detection:
bee mite parasitic rate detection is carried out on the ten to thirteen examples, and the detection results are shown in the table:
table 3 example ten to thirteen bee mite infestation rate measurements:
| testing | Parasitic rate of bee mites (%) |
| Example ten | 1.7％ |
| EXAMPLE eleven | 1.4％ |
| Example twelve | 2.1％ |
| EXAMPLE thirteen | 1.8％ |
As can be seen from the table, when the frequencies of the ultrasonic generators 22 in the two mite removing units 2 are respectively set to be 30kHz and 50kHz, the two ultrasonic waves do not generate great interference influence, the mite removing effect on the large bee mites and the small bee mites is better than other frequencies, meanwhile, the ultrasonic frequencies at 34kHz and 40kHz can also play a better effect on the large bee mites and the small bee mites, the mite removing effect of the mite removing device 6 under the frequencies is not worse than the mite removing effect of the medicament, and meanwhile, the device is harmless to the spleens of bees.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a mite device is removed to square wave formula supersound which characterized in that: including casing (1) and set up and remove mite unit (2) in casing (1), casing (1) side surface has the launch site, through-hole (121) of densely covered have been seted up in the launch site, remove mite unit (2) and include that it sets gradually to the launch site direction from casing (1) inside:
a coil (23) for generating a magnetic field;
an ultrasonic generator (22) for generating ultrasonic waves; and
an anion generator (21) for generating anions;
the ultrasonic wave generated by the ultrasonic generator (22) is transmitted outwards through the through hole (121), the negative ions generated by the negative ion generator (21) are positioned in the magnetic field generated by the coil (23), and meanwhile, the magnetic force of the magnetic field drives the negative ions to be ejected outwards through the through hole (121); the ultrasonic signal released by the ultrasonic generator (22) is a square wave signal.
2. The square wave type ultrasonic mite removing device according to claim 1, wherein: the anion generator (21) comprises a plurality of anion emission heads (211), and all the anion emission heads (211) are circumferentially arranged at a central point and emit anions to the central point.
3. The square wave type ultrasonic mite removing device according to claim 2, wherein: be provided with in casing (1) with coil (23), supersonic generator (22) and anion generator (21) electric connection's circuit control board (3), circuit control board (3) control coil (23), supersonic generator (22) and anion generator (21) are opened and close simultaneously, have mounting hole (31) that supply anion emission head (211) circumference to carry out the installation on circuit control board (3).
4. The square wave type ultrasonic mite removing device according to claim 3, wherein: each negative ion emitting head (211) is provided with an electric brush head (212) for releasing negative ions, and the concentration of the negative ions released by each electric brush head (212) is at least 100 ten thousand per cubic centimeter.
5. The square wave type ultrasonic mite removing device according to claim 4, wherein: the frequency of the ultrasonic waves released by the ultrasonic wave generator (22) is between 20kHz and 60 kHz.
6. The square wave type ultrasonic mite removing device according to claim 5, wherein: the frequency of the magnetic field is between 1kHz and 10 kHz.
7. The square wave type ultrasonic mite removing device according to claim 3, wherein: the shell (1) is also provided with an indicator light (32) electrically connected with the circuit control board (3).
8. The square wave type ultrasonic mite removing device according to claim 7, wherein: the power supply device is characterized in that a power supply unit (4) electrically connected with the circuit control board (3) is further arranged in the shell (1), and the power supply unit (4) is an external power supply or a battery arranged in the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021788275.3U CN212994019U (en) | 2020-08-24 | 2020-08-24 | Square wave type ultrasonic mite removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021788275.3U CN212994019U (en) | 2020-08-24 | 2020-08-24 | Square wave type ultrasonic mite removing device |
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| Publication Number | Publication Date |
|---|---|
| CN212994019U true CN212994019U (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021788275.3U Expired - Fee Related CN212994019U (en) | 2020-08-24 | 2020-08-24 | Square wave type ultrasonic mite removing device |
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| Country | Link |
|---|---|
| CN (1) | CN212994019U (en) |
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2020
- 2020-08-24 CN CN202021788275.3U patent/CN212994019U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210420 |