CN217450232U - Electric suction aid - Google Patents

Abstract

The application discloses electronic helping to inhale ware includes: the first end of the three-way communicating vessel is suitable for being connected with a liquid suction pipe; an air pump having an air inlet passage and an air outlet passage; the first valve is connected with the air outlet channel of the air pump and the second end of the three-way communicator and is configured to controllably select the air outlet channel of the air pump to be communicated with the atmosphere or the second end of the three-way communicator; the second valve is connected with an air inlet passage of the air pump and the third end of the three-way communicator and is configured to controllably select the air inlet passage of the air pump to be communicated with the atmosphere or the third end of the three-way communicator; and a control unit for controlling the first valve and the second valve to communicate with the atmosphere or the three-way communicator, respectively, such that the electric suction aid is controllably configured to include a suction mode and a release mode. The improved electric suction aid device of the utility model has simple structure and various functions, and can realize the suction of quantitative liquid.

Description

Electric suction aid

Technical Field

The application relates to the field of suction aids, in particular to an electric suction aid.

Background

A suction aid, also called a pipette, is a liquid transfer tool that transfers liquid from one container to another container within a certain range. Is widely used in the fields of biology, chemistry and the like.

However, the existing suction aid is generally controlled manually, and has a single function. Therefore, there is a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

One object of the present application is to provide an electric suction aid comprising: the first end of the three-way communicating vessel is suitable for being connected with a liquid suction pipe; an air pump having an air inlet passage and an air outlet passage; the first valve is connected with the air outlet channel of the air pump and the second end of the three-way communicator and is configured to controllably select the air outlet channel of the air pump to be communicated with the atmosphere or the second end of the three-way communicator; the second valve is connected with an air inlet passage of the air pump and the third end of the three-way communicator and is configured to controllably select the air inlet passage of the air pump to be communicated with the atmosphere or the third end of the three-way communicator; and a control unit for controlling the first valve and the second valve to communicate with the atmosphere or the three-way communicator, respectively, such that the electric suction aid is controllably configured to include a suction mode and a release mode.

Optionally, in the suction mode, the first valve is configured to select the air outlet channel of the air pump to communicate with the atmosphere, and the second valve is configured to select the air inlet channel of the air pump to communicate with the third end of the three-way communicator.

Optionally, the suction mode includes a quantitative suction mode in which the control unit is configured to start the air pump according to a suction instruction of a user and stop the air pump after the air pump continues to operate for a predetermined time, so that the pipette can suck a preset volume of liquid.

Optionally, the suction mode includes a free suction mode, in which the control unit is configured to start the air pump according to a suction instruction of a user and stop the air pump according to a stop instruction of the user, so that the pipette can suction a corresponding volume of liquid according to a user's requirement.

In the free suction mode, optionally, the control unit is configured to determine whether the working time of the air pump reaches a preset maximum working time, and stop the air pump when the preset maximum working time is reached.

Optionally, in the release mode, the first valve is configured to select the air outlet channel of the air pump to communicate with the second end of the three-way communicator, and the second valve is configured to select the air inlet channel of the air pump to communicate with the atmosphere.

Optionally, the operation mode is further controllably configured to be a standby mode, in which the first valve is configured to select the air outlet channel of the air pump to communicate with the atmosphere, and the second valve is configured to select the air inlet channel of the air pump to communicate with the atmosphere.

Optionally, the first valve includes a first valve and a second valve, the first valve is adapted to control the air outlet channel of the air pump to communicate with the atmosphere, and the second valve is adapted to control the air outlet channel of the air pump to communicate with the second end of the three-way communicator.

Optionally, the second valve includes a third valve and a fourth valve, the third valve is adapted to control the air inlet passage of the air pump to communicate with the atmosphere, and the fourth valve is adapted to control the air inlet passage of the air pump to communicate with the third end of the three-way communicator.

Optionally, the first valve includes a first valve core, the first valve core is controllably changeable between a first position and a second position, when the first valve core is located at the first position, the air outlet channel of the air pump is communicated with the atmosphere, and when the first valve core is located at the second position, the air outlet channel of the air pump is communicated with the second end of the three-way connector.

Optionally, the second valve includes a second valve core, and the second valve core is controllably variable between a third position and a fourth position, when the second valve core is located at the third position, the air inlet channel of the air pump is communicated with the atmosphere, and when the second valve core is located at the fourth position, the air outlet channel of the air pump is communicated with the third end of the three-way communicator.

Optionally, the electric suction aid further comprises: a pipette connection adapted to connect the pipette to the first end of the three-way communicator.

Optionally, the electric suction aid further comprises: a setting panel coupled to the control unit for a user to set pipetting parameters, the control unit controlling the first valve and the second valve to communicate with the atmosphere or with the three-way communicator, respectively, based on the pipetting parameters.

Optionally, the electric suction aid further comprises: an operation switch coupled to the control unit for receiving a user operation instruction, the control unit starting or stopping the air pump based on the user operation instruction.

Compared with the prior art, the technical scheme of the utility model have following advantage: the improved electric suction aid of the utility model has simple structure and various functions.

Drawings

The above-described and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. It is appreciated that these drawings depict only several embodiments of the disclosure and are therefore not to be considered limiting of its scope. The present disclosure will be described more clearly and in detail by using the accompanying drawings.

FIG. 1 illustrates an embodiment 10 of an electric suction aid of the present disclosure;

FIG. 2 is a schematic diagram of the connections between some of the components of the electric assist sucker 10;

FIG. 3A shows a schematic view of the electric assist aspirator 10 in an aspiration mode;

FIG. 3B shows a schematic view of the electric assist inhaler 10 operating in a release mode;

FIG. 3C shows a schematic view of the electric assist inhaler 10 operating in a standby mode;

FIG. 4 illustrates another embodiment 20 of the electric suction aid of the present disclosure;

FIG. 5 illustrates another embodiment 30 of the electric suction aid of the present disclosure.

Detailed Description

To facilitate an understanding of the present application by those skilled in the art, the following detailed description is given with reference to the accompanying drawings. In the drawings, like reference numerals generally refer to like parts throughout the various views unless the context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not limiting of the application. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter of the present application. It will be understood that aspects of the present disclosure, as generally described in the present disclosure and illustrated in the figures herein, may be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which form part of the present disclosure.

FIG. 1 illustrates an embodiment of an electric suction aid 10 of the present application, and FIG. 1 is a schematic view of the internal structure of the embodiment of the electric suction aid.

In the present embodiment, as shown in fig. 1, the electric suction aid 10 includes a housing 100, the housing 100 may be made of plastic and is formed by a mold injection molding process; the mold may also be used to form a combination of portions of the housing. For example, a housing formed in two parts, left and right, is combined to form the housing 100. In other embodiments, other materials may be used for the housing 100, such as metal, glass, ceramic, and other materials suitable for forming the housing 100. The material of the shell can be reasonably selected by the person skilled in the art according to actual needs.

The housing 100 defines a cavity 110. The chamber 110 is adapted to receive components of an electric suction aid, such as an air pump, a three-way connector, an air pipe, and a control circuit board. The cavity 110 can be reasonably partitioned into a plurality of independent discrete cavities by arranging partitions in the cavity 110, so that each component of the electric suction aid can be conveniently installed and fixed. The size of the discrete cavity can be reasonably set according to the size of the assembly to be installed and fixed.

The shape of the housing 100 may be set to a shape that is easy to grasp. It should be noted that, in order to facilitate the liquid suction, the shape of the housing 100 may be an "L" shape, or the housing 100 may be configured with a grip portion that is easy to hold, so as to facilitate the use of the housing by a user. The surface of the handle portion may be provided with a plurality of operation buttons or operation switches to control the on/off, mode operation, and switching functions of the electric suction aid 10. In other embodiments, the surface of the grip portion may also be provided with one or more operation panels to perform various functions of the electric suction aid.

In the present embodiment, the housing 100 is exemplarily illustrated as a pistol shape. In other embodiments, the shape can be selected by those skilled in the art according to the actual needs. It is expressly stated herein that the scope of protection of the present application should not be unduly limited.

In this embodiment, the components of the electric assist inhaler 10 include a three-way communicator 130, an air pump 140, a first valve 133, a second valve 134, and a control unit 150. These components are typically disposed within the cavity 110.

Referring to FIG. 2, FIG. 2 illustrates the connection between some of the components of the electric suction aid 10.

The three-way communicator 130 has three ports, i.e., a first end 130a, a second end 130b and a third end 130c, which communicate with each other. The first end 130a is adapted to be connected to a pipette 200, the pipette 200 being adapted to receive a liquid to be aspirated, the volume of which is not less than a maximum amount of liquid to be aspirated as preset by the electric suction aid 10.

The air pump 140 has an inlet channel 140a and an outlet channel 140b, and is used for pumping air in the air pipe, and generates a pressure difference after being started, so that the air can be pumped from the inlet channel 140a to the outlet channel 140 b. The air pump 140 is electrically connected to the control unit 150, and is started or stopped under the control of the control unit 150.

The first valve 133 is connected to the air outlet channel 140b of the air pump 140 and the second end 130b of the three-way communicator 130, and is configured to controllably select the air outlet channel 140b of the air pump 140 to be communicated with the atmosphere or the second end 130b of the three-way communicator 130. The first valve 133 is electrically connected to the control unit 150, and performs the above selection under the control of the control unit 150.

The second valve 134 is connected to the air inlet passage 140a of the air pump 140 and the third terminal 130c of the three-way communicator 130, and is configured to controllably select the air inlet passage 140a of the air pump 140 to communicate with the atmosphere or the third terminal 130c of the three-way communicator 130. The second valve 134 is electrically connected to the control unit 150, and the selection is performed under the control of the control unit 150.

The control unit 150 (see fig. 1) controls the air pump 140, the first valve 133 and the second valve 134 to cooperate with each other based on the pipetting parameters and the operation instructions of the user, so that the electric suction aid 10 can operate in the corresponding operation mode as required. For example, the control unit 150 may control the first and second valves 133 and 134 to communicate with the atmosphere or with the three-way communicator 130, respectively, such that the electric assist 10 is controllably configured to different operating modes. In the present embodiment, the control unit 150 is provided at the grip portion of the electric suction aid 10. The operation instructions may include a suck instruction, a release instruction, and a stop instruction. The pipetting parameters in this disclosure include various parameters involved in the operation of liquids using the electric assist grip 10, and may include the mode of operation, the volume of liquid operated, and the like. The operation mode includes various modes for operating the liquid, and may include, for example, a suction mode, a release mode, a standby mode, and the like.

In the suction mode, the first valve 133 is configured to select the air outlet channel 140b of the air pump 140 to communicate with the atmosphere, the second valve 134 is configured to select the air inlet channel 140a of the air pump 140 to communicate with the third end 130c of the three-way communicator 130, and when the air pump 140 is activated, the first end 130a of the three-way communicator 130 generates a negative pressure, so that the liquid can be sucked into the pipette 200.

In the release mode, the first valve 133 is configured to select the air outlet channel 140b of the air pump 140 to communicate with the third end 130b of the three-way connector 130, the second valve 134 is configured to select the air inlet channel 140a of the air pump 140 to communicate with the atmosphere, and when the air pump 140 is activated, the first end 130a of the three-way connector 130 generates positive pressure, so that the liquid in the pipette 200 can be discharged.

In the standby mode, the first valve 133 is configured to select the air outlet passage 140b of the air pump 140 to communicate with the atmosphere, and the second valve 134 is configured to select the air inlet passage 140a of the air pump 140 to communicate with the atmosphere. This arrangement can prevent a malfunction of the liquid because neither the air inlet passage 140a nor the air outlet passage 140b of the air pump 140 communicates with the liquid suction pipe. On the other hand, since the air inlet channel 140a and the air outlet channel 140b of the air pump 140 are both communicated with the atmosphere, the pressures of the air inlet channel 140a and the air outlet channel 140b and the outside can be balanced, even if the air pump 140 is started by a user by mistake, the explosion phenomenon caused by too large pressure difference can be avoided, and the safety is high.

In some embodiments, the aspiration mode can include a quantitative aspiration mode and a free aspiration mode. In the quantitative pipetting mode, the volume of liquid to be pipetted can be set as desired, and can be any volume not exceeding the volume of the pipette 200, or can be a fixed position, such as 5ml, 10ml, 25ml, 50ml, etc. In some embodiments, the control unit 150 may control the continuous operation of the air pump 140 for a predetermined time according to the volume of liquid to be sucked and the speed of liquid suction, so that the pipette 200 may suck a preset volume of liquid. In the free suction mode, the control unit 150 starts the air pump 140 according to a suction instruction of the user, and stops the air pump 140 according to a stop instruction of the user. It will be appreciated by those skilled in the art that in the free draw mode, the volume of liquid drawn is not fixed and may be freely determined by the user as desired, and the user should not exceed a preset maximum amount of liquid drawn while operating.

Similarly, in some embodiments, the release profile may include a fixed-dose release profile and a free-release profile. In the quantitative release mode, the volume of liquid released can be set as desired. In some embodiments, the control unit 150 may determine an operation time of the air pump 140 according to the volume of liquid to be discharged and the liquid discharge speed, and after the air pump 140 is started, the air pump 140 is stopped after a corresponding time elapses, so that the liquid of the preset volume in the pipette 200 may be discharged. In the free release mode, the control unit 150 starts the air pump 140 according to a release instruction of the user, and stops the air pump 140 according to a stop instruction of the user. It will be appreciated by those skilled in the art that in the free release mode, the volume of liquid released is not fixed and can be freely determined by the user as desired, but does not exceed the volume of liquid aspirated in the pipette 200.

In some embodiments, the electric suction aid 10 further has an emergency stop function, and the control unit 150 is configured to determine whether the operation time of the air pump 140 reaches a preset maximum operation time, and stop the air pump 140 when the preset maximum operation time is reached. The preset maximum working time corresponds to the maximum allowed liquid volume to be aspirated by the pipette. In the free suction mode, if the user does not stop the electric assist pump 10 in time, liquid may enter the air pump 140 through the three-way connector 130, causing damage to the air pump 140. Therefore, the scram function can prevent the electric suction aid 10 from being damaged or prevent the liquid from being wasted when an operation error occurs to the user.

In some embodiments, as shown in fig. 1, the electric assist suction 10 further comprises a pipette connection 120. The pipette connector 120 is adapted to connect the pipette 200 to the first end 130a of the three-way communication vessel 130. In some embodiments, the pipette connector 120 includes a pipette fixing mechanism (not shown) for stably connecting the pipette 200 to the three-way connector 130, thereby preventing air leakage during pipetting operations. In some embodiments, the connection of the pipette securing mechanism to the pipette 200 may be constructed of a flexible material to facilitate gripping of the outer wall of the pipette 200 to prevent air from entering the first end 130a of the three-way communication channel 130. In other embodiments, the pipette connector 120 may be replaced as needed, for example, to replace pipette connectors of different calibers to accommodate pipettes 200 of different tube diameters. In other embodiments, the pipette connector 120 may be connected to the housing of the power assist aspirator 10 by a snap fit, threaded coupling, or integral molding.

In some embodiments, as shown in FIG. 1, the electric suction aid 10 further comprises a setup panel 160. A setting panel 160 is coupled to the control unit 150 for setting pipetting parameters. It will be appreciated by those skilled in the art that the setting panel 160 can be any component that can be used to set pipetting parameters, for example, buttons, touch screens, voice recognition modules, etc., can be any shape, and should not be construed as merely a panel shape.

In some embodiments, as shown in FIG. 1, the electric assist inhaler 10 further comprises an operating switch 170. The operation switch 170 is used to receive an operation instruction from a user. The operation switch 170 may have various forms, such as a button, a sensor, etc., as long as it can receive an operation instruction from a user, and the operation instruction from the user may be triggered by pressing, touching, voice-controlling, etc. the operation switch 170. In addition, the number of the operation switches 170 may be one or several. The operation switch 170 may be disposed at a corresponding portion of the housing 100, such as a grip portion, as required for convenient operation. Different operating instructions may be implemented by different operating switches 170 or multiple activations of the same operating switch 170.

In some embodiments, the electric assist pump 10 may also be provided with a power source, which may be a built-in battery or an external power source, for powering the various components of the electric assist pump 10, such as the air pump 140 and the control unit.

To facilitate understanding of the present application, the structure and operation of the electric suction aid 10 will be further described with reference to fig. 3A, 3B and 3C. Wherein fig. 3A shows a schematic view of the electric suction aid 10 operating in the suction mode, fig. 3B shows a schematic view of the electric suction aid 10 operating in the release mode, and fig. 3C shows a schematic view of the electric suction aid 10 operating in the standby mode.

One embodiment of the first valve 133 and the second valve 134 is shown in fig. 3A-C. In this embodiment, the first valve 133 includes a first valve 133a and a second valve 133 b. Wherein the first valve 133a is adapted to control the air outlet channel 140b of the air pump 140 to communicate with the atmosphere, and the second valve 133b is adapted to control the air outlet channel 140b of the air pump 140 to communicate with the second end 130b of the three-way communicator 130. The second valve 134 includes a third valve 134a and a fourth valve 134 b. Wherein the third valve 134a is adapted to control the air inlet channel 140a of the air pump 140 to communicate with the atmosphere, and the fourth valve 134b is adapted to control the air inlet channel 140a of the air pump 140 to communicate with the third end 130c of the three-way communicator 130.

As shown in fig. 3A, in the suction mode, the control unit 150 controls the first and fourth valves 133A and 134b to be opened, and the second and third valves 133b and 134a to be closed. Upon receiving the suction instruction from the user, the control unit 150 activates the air pump 140. At this time, a one-way air flow passage is formed from the first end 130a of the three-way connector 130 to the atmosphere via the third end 130c, the inlet passage 140a, the outlet passage 140b, and the first valve 133 a. At this time, the first end 130a of the three-way communication connector 130 generates a negative pressure, so that liquid can be sucked into the pipette 200. The control unit 150 can then stop the air pump 140 at the appropriate time based on the pipetting parameters. For example, when the electric suction aid 10 operates in the quantitative suction mode, the control unit 150 may control the air pump 140 to operate for a predetermined time; when the electric assist inhaler 10 operates in the free suction mode, the control unit 150 may stop the air pump 140 after receiving a stop command from the user.

As shown in fig. 3B, in the release mode, the control unit 150 controls the first and fourth valves 133a and 134B to be closed and the second and third valves 133B and 134a to be opened. Upon receiving a release instruction from the user, the control unit 150 activates the air pump 140. At this time, a one-way air flow path is formed from the atmosphere, via the third valve 134a, the inlet channel 140a, the outlet channel 140b, the second valve 133b, the second end 130b of the three-way connector 130, to the first end 130a of the three-way connector 130. At this time, the first end 130a of the three-way communication connector 130 generates positive pressure, so that the liquid in the pipette 200 can be discharged. Then, similarly, the control unit 150 can stop the air pump 140 at an appropriate time based on the pipetting parameters. For example, when the electric suction aid 10 operates in the metered release mode, the control unit 150 may control the air pump 140 to operate for a predetermined time; when the electric suction aid 10 is operating in the free release mode, the control unit 150 may stop the air pump 140 upon receiving a user-triggered stop command.

As shown in fig. 3C, in the standby mode, the control unit 150 controls the first and third valves 133a and 134a to be opened and the second and fourth valves 133b and 134b to be closed. The communication of the air inlet passage 140a and the air outlet passage 140b of the air pump 140 with the three-way communicator 130 is cut off. At this time, the first end 130a of the three-way communication vessel 130 becomes a balanced air pressure, and the pipette 200 cannot suck or discharge the liquid.

In some embodiments, the control unit 150 controls the electric suction aid 10 to enter the standby mode when the suction mode or the release mode is finished.

FIG. 4 illustrates another embodiment 20 of the electric suction aid of the present disclosure. This embodiment differs from the electric assist pump 10 in that the internal structure of the first and second valves is different from that of the electric assist pump 10, and the remaining components and the connection relationship of the components are the same as those of the electric assist pump 10. In this embodiment, the second valve may have the same structure as the first valve, so for avoiding redundant description, only the air pump 240 and the first valve 233 are shown in the figure, and those skilled in the art can understand the structure and the operation principle of the electric suction aid 20 according to the electric suction aid 10 and the following description.

As shown in fig. 4, the first valve 233 includes a first valve spool 2331, a first end of which 2331 is rotatably fixed to the wall of the tube and the other end is rotatable about the first end such that the first valve spool 2331 is controllably variable between a first position 233a and a second position 233 b. When the first valve spool 2331 is in the first position 233a, the air outlet channel 240b of the air pump 240 is in communication with a second end of the three-way communicator (not shown); when the first valve spool 2331 is in the second position 233b, the air outlet channel 240b of the air pump 240 is open to the atmosphere. Similarly, the second valve includes a second spool having a first end rotatably fixed to the tube wall and an opposite end rotatable about the first end such that the second spool is controllably variable between a third position and a fourth position. When the second valve core is located at the third position, the air inlet channel 240a of the air pump 240 is communicated with the third end of the three-way communicator; when the second spool is in the fourth position, the intake passage 240a of the air pump 240 is open to the atmosphere (not shown). The rotation of the first and second spools is controlled by a control unit 150.

FIG. 5 illustrates another embodiment 30 of the electric suction aid of the present disclosure. This embodiment differs from the electric assist pump 10 in that the internal structure of the first and second valves is different from that of the electric assist pump 10, and the remaining components and the connection relationship of the components are the same as those of the electric assist pump 10. In this embodiment, the second valve may have the same structure as the first valve, so for avoiding redundant description, only the air pump 340 and the first valve 333 are shown in the drawings, and those skilled in the art can understand the structure and the operation principle of the electric suction aid 30 according to the electric suction aid 10 and the following description.

As shown in fig. 5, the first valve 333 includes a first spool 3331, and the first spool 3331 is movable in a pipe radial direction such that the first spool 3331 is controllably variable between a first position 333a and a second position 333 b. When the first valve core 3331 is located at the first position 333a, the air outlet channel 340b of the air pump 340 is communicated with the second end of the three-way communicator (not shown in the figure); when the first valve spool 3331 is at the second position 333b, the air outlet passage 340b of the air pump 340 is open to the atmosphere. Similarly, the second valve includes a second spool that is radially movable along the conduit such that the second spool controllably changes between a third position and a fourth position. When the second valve core is positioned at the third position, the air inlet channel 340a of the air pump 340 is communicated with the third end of the three-way communicator; when the second valve spool is located at the fourth position, the air intake passage 340a of the air pump 340 communicates with the atmosphere (not shown in the drawings).

The first and second valves are identical in construction in each of the electric assist device embodiments 10, 20, and 30 of the present application, but this is merely exemplary and the present application is not limited to the first and second valves being identical in construction. Those skilled in the art will appreciate that the first and second valves may be configured differently so long as the corresponding functions are achieved. In some embodiments, the first valve or the second valve of embodiment 10 may be used as the first valve and the first valve or the second valve of embodiment 20 may be used as the second valve.

Although the present application is disclosed above, the present application is not limited thereto. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a review of the specification, the disclosure, the drawings, and the appended claims. Various changes and modifications can be made without departing from the spirit and scope of the application, and the scope of protection of the application should therefore be determined by the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. In the practical application of the present application, one element may perform the functions of several technical features recited in the claims. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (14)

1. An electric suction aid, comprising:

the first end of the three-way communicating vessel is suitable for being connected with a liquid suction pipe;

an air pump having an air inlet passage and an air outlet passage;

the first valve is connected with the air outlet channel of the air pump and the second end of the three-way communicator, and is configured to controllably select the air outlet channel of the air pump to be communicated with the atmosphere or the second end of the three-way communicator;

the second valve is connected with an air inlet passage of the air pump and the third end of the three-way communicator and is configured to controllably select the air inlet passage of the air pump to be communicated with the atmosphere or the third end of the three-way communicator; and

a control unit for controlling the first and second valves to communicate with atmosphere or with the three-way communicator, respectively, such that the electric assist is controllably configured to include a suction mode and a release mode.

2. The electric assist suction device according to claim 1, wherein in the suction mode, the first valve is configured to select the air outlet passage of the air pump to communicate with the atmosphere, and the second valve is configured to select the air inlet passage of the air pump to communicate with the third end of the three-way communication device.

3. The electric assist aspirator of claim 1, wherein the suction mode includes a quantitative suction mode in which the control unit is configured to start the air pump according to a suction instruction of a user and stop the air pump after the air pump is continuously operated for a predetermined time, so that the pipette can suck a preset volume of liquid.

4. The electric assist aspirator of claim 1, wherein the suction mode comprises a free suction mode in which the control unit is configured to start the air pump according to a suction instruction of a user and stop the air pump according to a stop instruction of the user, so that the pipette can suction a corresponding volume of liquid according to a user's need.

5. The electric assist of claim 4, wherein the control unit is configured to determine whether an operating time of the air pump reaches a preset maximum operating time and stop the air pump when the preset maximum operating time is reached.

6. The electric assist of claim 1, wherein in the release mode, the first valve is configured to select the air outlet passage of the air pump to communicate with the second end of the three-way communicator and the second valve is configured to select the air inlet passage of the air pump to communicate with the atmosphere.

7. The electric assist of claim 1, further controllably configured in a standby mode in which the first valve is configured to select the air outlet passage of the air pump to communicate with the atmosphere and the second valve is configured to select the air inlet passage of the air pump to communicate with the atmosphere.

8. The electric assist suction device according to claim 1, wherein the first valve comprises a first valve and a second valve, the first valve is adapted to control the air outlet channel of the air pump to communicate with the atmosphere, and the second valve is adapted to control the air outlet channel of the air pump to communicate with the second end of the three-way communicator.

9. The electric assist of claim 1, wherein the second valve comprises a third valve adapted to control the air inlet passage of the air pump to communicate with the atmosphere and a fourth valve adapted to control the air inlet passage of the air pump to communicate with the third end of the three-way connector.

10. The electric suction aid of claim 1, wherein the first valve comprises a first valve core, the first valve core being controllably variable between a first position and a second position, the air outlet channel of the air pump being in communication with the atmosphere when the first valve core is in the first position, and the air outlet channel of the air pump being in communication with the second end of the three-way connector when the first valve core is in the second position.

11. The electric assist sucker according to claim 1, wherein the second valve includes a second valve core, the second valve core being controllably variable between a third position and a fourth position, the air inlet passage of the air pump being in communication with the atmosphere when the second valve core is in the third position, and the air outlet passage of the air pump being in communication with the third end of the three-way communicator when the second valve core is in the fourth position.

12. The electric assist of any one of claims 1 to 11, further comprising:

a pipette connection adapted to connect the pipette to the first end of the three-way communicator.

13. The electric assist suction of claim 12, further comprising:

a setting panel coupled to the control unit for setting pipetting parameters, the control unit controlling the first valve and the second valve to communicate with the atmosphere or with the three-way communicator, respectively, based on the pipetting parameters.

14. The electric assist suction of claim 13, further comprising:

an operation switch coupled to the control unit for receiving a user operation instruction, the control unit starting or stopping the air pump based on the user operation instruction.

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