CN215029031U

CN215029031U - Electric liquid transfer device

Info

Publication number: CN215029031U
Application number: CN202120782876.1U
Authority: CN
Inventors: 孔志博; 祁晓兵; 赵欢; 林云辉; 张剑滨; 曾俊添; 张东旭; 葛胜祥; 程通; 李少伟; 张军; 夏宁邵
Original assignee: Xiamen University
Current assignee: Xiamen University
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-12-07
Anticipated expiration: 2031-04-16

Abstract

The utility model relates to an electronic pipettor, electronic pipettor includes: a pump (10) for providing power for sucking or discharging the liquid; an adapter (12) in communication with the pump (12) and configured to removably mount a pipetting container (11); a liquid level sensor (7) configured to detect a liquid level within the pipetting container (11); a controller electrically connected to the liquid level sensor (7) and the pump (10), respectively, and configured to turn off the pump (10) when the liquid level in the pipetting container (11) reaches a predetermined value. Use the technical scheme of the utility model, when liquid level reached the predetermined value in liquid-transfering container (11), pump (10) of pipettor were closed, consequently improved to have in the correlation technique because of can not loosen the imbibition switch in time and lead to inhaling too much liquid problem.

Description

Electric liquid transfer device

Technical Field

The utility model relates to a biological assay apparatus field particularly, relates to an electronic pipettor.

Background

In biological experiments, a large number of cells need to be cultured, and waste liquid in a cell culture dish needs to be removed. With the rapid development of the biological scientific research field, the tasks of experiments such as cell culture and the like are gradually increased, so that liquid transfer and liquid change are required in many scenes in the experiments.

Generally, a large amount of liquid transfer and liquid change of a biological laboratory need to use an electric liquid transfer device. The electric pipettor can be charged to be separated from the power line for use, and is very small and convenient.

Fig. 1 shows a related art electric pipette, and as shown in fig. 1, the electric pipette includes a housing 1, and the housing 1 includes a handle portion 2 and a cantilever portion 3 connected to the handle portion 2. Wherein the extending directions of the handle part 2 and the cantilever part 3 are crossed to form a pistol-shaped structure. The electric pipette further includes a vacuum pump 6, a controller 5, and a battery 4 disposed within the housing 1. The battery 4 is electrically connected to the vacuum pump 6 to power the vacuum pump 6, and the controller 5 is in signal connection with the vacuum pump 6 to control the operation of the vacuum pump 6. Wherein the accumulator 4 is arranged in the handle portion 2 of the housing and the vacuum pump 6 is arranged in the cantilever portion 3 of the housing 1.

The electric pipettor further comprises a connector 7 communicated with the vacuum pump 6, and a pipetting container 8 is mounted on the connector 7. The first end of the pipetting container 8 communicates with the adapter 7 for communicating with the vacuum pump 6 via the adapter 7, and the fluid port of the second end of the pipetting container 8 is used for introducing or discharging a liquid. Optionally, the joint 7 comprises a rubber sealing head. The electric pipettor further comprises an air path regulator for controlling the vacuum pump to suck or exhaust air, when the vacuum pump of the electric pipettor is in an air suction state, liquid is sucked into the liquid transfer container 8 communicated with the vacuum pump 6, and when the vacuum pump 6 is in an air exhaust state, the liquid is discharged from the liquid transfer container 8.

The electric pipette also comprises a liquid suction switch 9 and a liquid discharge switch 10 which are connected with the air path regulator. After the liquid suction switch 9 is pressed, the vacuum pump 6 is in a suction state, and the liquid transfer container 8 sucks liquid; when the liquid discharge switch 10 is pressed, the vacuum pump 6 is in an exhaust state, and the liquid transfer container 8 discharges the liquid. Wherein the content of the first and second substances,

the related art electric pipettors have two disadvantages:

first, suck-back is easy. Because the liquid suction switch 9 is manually pressed, the diaphragm vacuum pump 6 works, liquid is sucked into the liquid transfer container 8 (glass tube) from the culture container, if the liquid suction switch 9 cannot be timely loosened, the liquid can be sucked into the air filter between the vacuum pump 6 and the connector 7, and even into the diaphragm vacuum pump 6 seriously, the air filter is failed, the diaphragm vacuum pump is in failure, and even the risk of polluting the environment exists.

Second, current electronic pipettor is inserted the mouth that charges of electronic pipettor through the power interface of adapter in, and is not convenient enough, often forgets to charge or fills the electricity and forgets to pull out the charging wire, leads to electronic pipettor often to be in shortcoming or battery by the state of overcharging.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic pipettor to exist because of can not loosen the imbibition switch in time and lead to inhaling too much liquid problem among the improvement correlation technique.

According to an aspect of the embodiments of the present invention, there is provided an electric pipette, which includes:

a pump for providing power to pump or discharge the liquid;

an adapter in communication with the pump and configured to removably mount a pipetting container;

a liquid level sensor configured to detect a liquid level within the pipetting container; and

a controller electrically connected to the level sensor and the pump, respectively, and configured to turn off the pump when the liquid level in the pipetting container reaches a predetermined value.

In some embodiments, the electronic pipettor further comprises a relay in electrical connection with the pump, the controller in signal connection with the relay, the controller configured to close the relay to stop power to the pump when the liquid level of the pipette container reaches a predetermined value.

In some embodiments, the electronic pipettor further comprises:

a battery;

the first power supply branch is connected with the battery and the pump, and is provided with a liquid absorption switch and a relay for controlling whether the pump provides power for sucking liquid or not; and

and the second power supply branch is connected with the battery and the pump, is connected with the first power supply branch in parallel, and is provided with a liquid drainage switch for controlling whether the pump provides power for draining liquid.

In some embodiments, the pump comprises a diaphragm vacuum pump.

In some embodiments, the electronic pipettor further comprises:

a battery configured to provide electrical energy to the pump; and

and the wireless charging receiving part is electrically connected with the battery to wirelessly charge the battery.

In some embodiments, the electronic pipettor further comprises:

a wireless charging transmitting component coupled to the wireless charging receiving component to charge the battery; and

and the power adapter is electrically connected with the wireless charging transmitting part to provide a preset voltage for the wireless charging transmitting part.

In some embodiments, the electronic pipettor further comprises a power control component configured to stop charging of the battery when the charge of the battery reaches a predetermined value.

In some embodiments, the power control component comprises:

a charge amount detection device configured to detect a charge amount of the battery; and

and a charging relay connected between the battery and the wireless charging acceptance part to cut off the electrical connection between the battery and the wireless charging acceptance part when the charge amount of the battery reaches a predetermined value.

In some embodiments, the electronic pipettor further comprises a housing, the pump disposed within the housing, the joint disposed outside the housing, and the level sensor disposed at an end of the joint distal from the housing.

In some embodiments, the housing comprises:

a handle portion in which a battery is disposed; and

the cantilever part is connected with one end of the handle part and crossed with the extending direction of the handle part, and a pump is arranged in the cantilever part.

Use the technical scheme of the utility model, when liquid level reached the predetermined value in the liquid-transfering container, the pump of pipettor was closed, consequently improved to have in the correlation technique because of can not loosen the imbibition switch in time and lead to inhaling too much liquid problem.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a schematic view of a related art electric pipette;

fig. 2 shows a schematic circuit diagram of an electric pipette of an embodiment of the present invention; and

fig. 3 shows the gas circuit of the electric pipette of the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the electric pipette includes a pump 10, a joint 12, a liquid level sensor 7, and a controller. The pump 10 provides the power for sucking or discharging the liquid; the adapter 12 is in communication with the pump 12 and is configured to removably mount the pipetting container 11; the level sensor 7 is configured to detect the liquid level inside the pipetting container 11; the controller is electrically connected to the level sensor 7 and the pump 10, respectively, and is configured to turn off the pump 10 when the liquid level in the pipetting container 11 reaches a predetermined value.

In the present embodiment, when the liquid level in the pipette container 11 reaches a predetermined value, the pump 10 of the pipette is turned off, thereby improving the problem in the related art that excessive liquid is sucked due to the failure to timely release the pipette switch.

The electronic pipettor further comprises a relay 6, the relay 6 being electrically connected to the pump 10, the controller being in signal connection with the relay 6, the controller being configured to close the relay 6 to stop the supply of power to the pump 10 when the liquid level of the pipetting vessel 11 reaches a predetermined value.

The electric pipettor further comprises a first power supply branch and a second power supply branch of the battery 5. The first power supply branch connects the battery 5 with the pump 10, in which a suction switch 8 and a relay 6 are provided which control whether the pump 10 provides power to suck the liquid. And the second power supply branch is connected with the battery 5 and the pump 10 and is connected with the first power supply branch in parallel, and a liquid discharge switch 9 for controlling whether the pump 10 provides power for discharging liquid or not is arranged in the second power supply branch.

The pump 10 comprises a diaphragm vacuum pump.

The electric pipettor further comprises a battery 5 and a wireless charging reception member 3. A battery 5 configured to provide electrical power to the pump 10. The wireless charging acceptance member 3 is electrically connected to the battery 5 to wirelessly charge the battery.

The electronic pipettor still includes wireless transmission part 2 and the power adapter 1 that charges. The wireless charging transmission part 2 is coupled with the wireless charging reception part 3 to charge the battery 5. The power adapter 1 is electrically connected to the wireless charging transmission part 2 to supply a predetermined voltage to the wireless charging transmission part 2.

The electric pipette includes a power supply control part 4, and the power supply control part 4 is configured to stop charging of the battery 5 when the charge of the battery 5 reaches a predetermined value.

In some embodiments, the power supply control part 4 includes a charge amount detection device and a charge relay. Wherein the charge detection device is configured to detect the charge of the battery 5. And a charging relay connected between the battery 5 and the wireless charging acceptance part 3 to cut off the electrical connection between the battery 5 and the wireless charging acceptance part 3 when the charge of the battery 5 reaches a predetermined value.

The electric pipette further comprises a housing, the pump 10 is arranged in the housing, the joint 12 is arranged outside the housing, and the liquid level sensor 7 is arranged at one end of the joint 12 far away from the housing.

The housing includes a handle portion and a cantilever portion. A battery 5 is arranged in the handle part;

the cantilever part is connected with one end of the handle part and is crossed with the extending direction of the handle part to form a gun-shaped structure, and a pump 10 is arranged in the cantilever part.

In this embodiment, the joint 12 is a rubber sealing head. The pipetting container 11 is a glass tube. The level sensor 7 is arranged at the end of the adapter 12 remote from the housing or at the end of the pipetting container 11 close to the housing.

The suck-back prevention electric pipettor detects the liquid level position in the glass tube 11 through the liquid level sensor 7, and once the liquid level reaches the position of the liquid level sensor, the relay 6 is triggered to be disconnected, and the diaphragm vacuum pump 10 stops working. At the moment, the work of the liquid drainage switch 9 is not influenced, when the liquid drainage switch 9 works, the liquid level is reduced, the liquid level sensor 7 cannot detect the liquid level, the relay 6 is closed, the liquid suction switch 8 can continue to work, and the liquid suction switch is very safe and reliable.

In some embodiments, the relay 6 is a shorting relay.

The utility model discloses prevent suck-back electronic pipettor adopts wireless mode of charging, and is succinct convenient to be furnished with power control unit 4, when rechargeable battery 5 is full of the electric quantity, automatic shutdown charges, prevents rechargeable battery 5 because of potential safety hazards such as ageing even firing that overcharging leads to, very simple easy operation.

When the user uses the suck-back prevention electric pipette of this embodiment to transfer liquid, the user presses the suck-back switch 8, the pump 10 works, and the air path direction regulator 14 is in a suction mode. Liquid enters the glass tube 11, when the liquid level reaches the liquid level sensor 7, the liquid level sensor 7 works, the trigger relay 6 is switched off, the pump 10 stops working, and the liquid level does not rise any more. At this point, the drain switch 9 is pressed, the pump 10 is operated, the gas path regulator 14 is in the exhaust mode, and the liquid is drained from the glass tube 11. The liquid level drops, the liquid level sensor 7 returns to normal, and the relay 6 is closed. At this time, the suction switch 8 is pressed, the pump 10 is operated, and the air passage regulator 14 is in the suction mode, and next suction is performed.

When the anti-suck-back electric pipettor rechargeable battery 5 is insufficient in electric quantity, the anti-suck-back electric pipettor is prevented from being placed on the wireless charging emission 2 for wireless charging, and the method is very simple and convenient. When the power control module 4 detects that the electric quantity of the rechargeable battery 5 is full, the charging circuit is automatically disconnected, charging is stopped, the rechargeable battery 5 is protected, and potential safety hazards caused by fire of the rechargeable battery 5 due to aging of the rechargeable battery 5 and even overcharge are prevented.

The above description is only exemplary embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric pipette, comprising:

a pump (10) for providing power for sucking or discharging the liquid;

an adapter (12) in communication with the pump (12) and configured to removably mount a pipetting container (11);

a liquid level sensor (7) configured to detect a liquid level within the pipetting container (11); and

a controller electrically connected to the level sensor (7) and the pump (10), respectively, and configured to turn off the pump (10) when the liquid level within the pipetting container (11) reaches a predetermined value.

2. The electric pipette according to claim 1, further comprising a relay (6), the relay (6) being electrically connected with the pump (10), the controller being in signal connection with the relay (6), the controller being configured to close the relay (6) to stop supplying power to the pump (10) when the liquid level of the pipetting vessel (11) reaches a predetermined value.

3. The electric pipette of claim 1, further comprising:

a battery (5);

a first power supply branch connecting the battery (5) and the pump (10), wherein a liquid suction switch (8) and the relay (6) are arranged for controlling whether the pump (10) provides power for sucking liquid; and

and the second power supply branch is connected with the battery (5) and the pump (10) and is connected with the first power supply branch in parallel, and a liquid discharge switch (9) for controlling whether the pump (10) provides power for discharging liquid is arranged.

4. The electric pipette according to claim 1, characterized in that the pump (10) comprises a diaphragm vacuum pump.

5. The electric pipette of claim 1, further comprising:

a battery (5) configured to provide electrical energy to the pump (10); and

and a wireless charging receiving member (3) electrically connected to the battery (5) to wirelessly charge the battery.

6. The electric pipette of claim 5, further comprising:

a wireless charging transmitting part (2) coupled with the wireless charging receiving part (3) to charge the battery (5); and

the power adapter (1) is electrically connected with the wireless charging transmitting part (2) to provide a preset voltage for the wireless charging transmitting part (2).

7. The electric pipette according to claim 5, characterized by further comprising a power supply control part (4), the power supply control part (4) being configured to stop charging of the battery (5) when the charge of the battery (5) reaches a predetermined value.

8. The electric pipette according to claim 7, characterized in that the power supply control part (4) comprises:

a charge amount detection device configured to detect a charge amount of the battery (5); and

a charging relay connected between the battery (5) and the wireless charging acceptance member (3) to cut off the electrical connection of the battery (5) and the wireless charging acceptance member (3) when the amount of charge of the battery (5) reaches a predetermined value.

9. An electric pipette according to claim 1, further comprising a housing, the pump (10) being arranged within the housing, the joint (12) being arranged outside the housing, the level sensor (7) being arranged at an end of the joint (12) remote from the housing.

10. The electric pipette of claim 9, wherein the housing comprises:

a handle portion in which the battery (5) is disposed; and

and the cantilever part is connected with one end of the handle part and is crossed with the extending direction of the handle part, and the pump (10) is arranged in the cantilever part.