Vacuum system for suction head and operation method

Abstract

The invention discloses a vacuum system for a suction head and an operation method. The vacuum system comprises a vacuum driving assembly, a pressure storage assembly and a vacuum control assembly. The vacuum driving assembly is communicated with the vacuum control assembly, the pressure storage assembly is communicated with the vacuum control assembly, and the vacuum control assembly is respectively communicated with the suction head and the working cabin; the vacuum driving assembly can perform vacuum extraction on the pressure storage assembly through the vacuum control assembly, the vacuum control assembly is matched with the pressure storage assembly and the vacuum driving assembly to form suction head positive pressure or negative pressure, and a sample tube is sucked or placed through the suction head. The device has the beneficial effects that two pipelines of a vacuum system are connected into the suction head and the working cabin respectively, negative-pressure vacuum suction pipes and positive-pressure vacuum breaking pipe discharging of the vacuum suction head are achieved respectively by controlling opening and closing of the three sets of electromagnetic valves, gas comes from the interior of the working cabin communicated with another pipeline, full sealing is achieved, and the working efficiency is improved. And external gas is prevented from being introduced to damage a dry environment in the working cabin, so that samples or equipment parts in the low-temperature storage area are prevented from frosting / icing.

Description

Technical Field

[0001] The present invention relates to the technical field of sample storage, and in particular to a vacuum system for a pipette tip and an operating method thereof. Background Art

[0002] In the field of biological sample banks, the cryopreservation tubes used to hold biological samples are relatively small. Vacuum suction is a common method for storing and accessing tubes, and vacuum suction requires a vacuum pump to provide vacuum. When the vacuum pump loosens the sample tube, it needs to introduce gas to break the vacuum with positive pressure. The sample tube transfer operation is usually carried out in a working cabin, and the internal environment of the working cabin is usually disinfected and dehumidified. Introducing external gas can easily destroy the stability of the environment.

[0003] To this end, the inventor has designed a vacuum system and operating method for a suction head. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a vacuum system for a suction head, which can realize negative pressure and positive pressure of the vacuum suction head respectively by controlling the opening and closing of three groups of solenoid valves, so as to absorb and place the sample, and the gas source is in a connected working cabin, which realizes full closure and avoids the introduction of external gas to destroy the dry environment in the working cabin and cause frost on the samples or mechanical equipment in the working cabin.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a vacuum system for a pipette tip, comprising a vacuum drive component, a pressure storage component, and a vacuum control component; the vacuum drive component is connected to the vacuum control component, the pressure storage component is connected to the vacuum control component, and the vacuum control component is connected to the pipette tip and the working chamber respectively; the vacuum drive component can perform vacuum extraction on the pressure storage component through the vacuum control component, the vacuum control component cooperates with the pressure storage component and the vacuum drive component to form positive or negative pressure on the pipette tip, and the sample tube is sucked or placed through the pipette tip.

[0008] As a preferred solution of the vacuum system for the suction tip of the present invention, the vacuum control component includes a first pipeline control component and a second pipeline control component; the vacuum drive component is connected to the first pipeline control component and the second pipeline control component respectively, the first pipeline control component and the second pipeline control component can be communicated, and the second pipeline control component is connected to the pressure storage component.

[0009] As a preferred solution of the vacuum system for the suction tip of the present invention, the first pipeline control component includes an A solenoid valve, a first connecting pipe, a second connecting pipe, and a working chamber connecting pipe; the first connecting pipe connects the A solenoid valve and the vacuum drive component, and the second connecting pipe is connected to the A solenoid valve and the working chamber connecting pipe.

[0010] As a preferred solution of the vacuum system for the suction tip of the present invention, the second pipeline control component includes a C solenoid valve, a third connecting pipe and a fourth connecting pipe; the third connecting pipe is connected to the C solenoid valve and the vacuum drive assembly, and the fourth connecting pipe is connected to the C solenoid valve and the working chamber connecting pipe.

[0011] As a preferred solution of the vacuum system for the suction head of the present invention, the second pipeline control component also includes a fifth pipeline, a sixth pipeline, a vacuum pressure switch, and a vacuum suction head pipeline; the fifth pipeline is connected to the vacuum pressure switch and the C solenoid valve, the sixth pipeline is connected to the fifth pipeline and the pressure storage component, and the vacuum pressure switch is connected to the vacuum suction head pipeline.

[0012] As a preferred solution of the vacuum system for the suction head of the present invention, one side of the vacuum suction head pipeline is connected to a vacuum filter, and the vacuum filter is arranged on the side of the vacuum pressure switch.

[0013] As a preferred solution of the vacuum system for the suction head of the present invention, the pressure storage component includes a pressure storage tank and a third pipeline control component; the third pipeline control component is connected to the pressure storage tank and the second pipeline control component.

[0014] As a preferred solution of the vacuum system for the suction head of the present invention, the third pipeline control component includes a B solenoid valve, a seventh pipeline, and an eighth pipeline; the seventh pipeline is connected to the B solenoid valve and one end of the pressure storage tank, and the eighth pipeline is connected to the pressure storage tank and the other end of the B solenoid valve.

[0015] As a preferred solution of the vacuum system for the suction head of the present invention, the pressure storage tank, the A solenoid valve, the vacuum drive assembly, the C solenoid valve and the working cabin can form a series circuit, and the pressure storage tank can form a negative pressure.

[0016] As a preferred solution of the vacuum system for the pipette tip of the present invention, the vacuum drive component and the A solenoid valve, the B solenoid valve, the C solenoid valve, the pressure storage tank, the vacuum filter, the vacuum pressure switch, the pipette tip and the working cabin can form a series negative pressure circuit, and the pipette tip can suck the sample tube under negative pressure.

[0017] As a preferred embodiment of the vacuum system for the pipette tip of the present invention, the vacuum drive assembly, the A solenoid valve, the C solenoid valve, the vacuum pressure switch, the vacuum filter, the pipette tip and the working chamber can form a series positive pressure circuit, and the pipette tip can place the sample tube under positive pressure.

[0018] The present invention also provides the following technical solution, including a vacuum system for a suction head, and also including a method for operating the vacuum system, as follows: S1: the vacuum drive component is powered on, and the system starts to operate; S2: A solenoid valve, B solenoid valve, and C solenoid valve are all in the power-off state: the 2-way port and 3-way port of A solenoid valve, B solenoid valve, and C solenoid valve are all connected, and the pressure storage tank is in the disconnected and closed state; at this time, the working cabin, the 3-way 2-way port of C solenoid valve, the vacuum drive component, the 2-way 3-way port of A solenoid valve, and the pressure storage tank are connected in series, and the gas in the pressure storage tank is pumped into the working cabin, and the pressure storage tank forms a negative pressure. The other components are not involved in the gas circuit for the time being; S3: A solenoid valve and C solenoid valve are de-energized, B solenoid valve is energized: the 2-way port and 3-way port of A solenoid valve and C solenoid valve are connected, and the 2-way port and 1-way port of B solenoid valve are connected. At this time, the suction head, vacuum pressure switch, vacuum filter, 2-way port and 1-way port of B solenoid valve, pressure storage tank, 3-way port and 2-way port of A solenoid valve, vacuum drive assembly, 2-way port and 3-way port of C solenoid valve, and working cabin form a series circuit, and the negative pressure at the suction head sucks the cryopreservation tube, and the vacuum pressure switch feeds back the negative pressure suction signal; S4: A solenoid valve and C solenoid valve are powered, B solenoid valve is de-energized: the 2-way port and 1-way port of A solenoid valve and C solenoid valve are connected, and the pressure storage tank is in the disconnected closed state. At this time, the suction head, vacuum pressure switch, vacuum filter, 2-way port and 1-way port of C solenoid valve, vacuum drive assembly, 1-way and 2-way ports of A solenoid valve, and working cabin form a series circuit, and the positive pressure at the suction head releases the cryotube; S5: Cycle steps 3 and 4, and use the suction tip to suck the cryotube under negative pressure and place it under positive pressure.

[0019] Beneficial effects of the present invention: The present invention respectively connects the suction head and the working cabin through two pipelines of the vacuum system, and realizes the negative pressure vacuum suction pipe and the positive pressure vacuum release pipe of the vacuum suction head by controlling the opening and closing of three groups of solenoid valves. The gas comes from the working cabin connected by another pipeline, so as to achieve full closure and avoid the introduction of external gas to destroy the dry environment in the working cabin and cause frost / ice on samples or equipment parts in the low-temperature storage area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 A three-dimensional schematic diagram of a vacuum system for a suction head.

[0021] Figure 2 A top view of the vacuum system for the suction head.

[0022] Figure 3 The front view of the vacuum system for the suction tip.

[0023] Figure 4 Schematic diagram of the principle of the operation method of the vacuum system for the suction head.

[0024] Figure numerals: vacuum drive assembly, 1; pressure storage assembly, 2; vacuum control assembly, 3; first pipeline control component, 31; second pipeline control component, 32; A electromagnetic valve, 311; first connecting pipe, 312; second connecting pipe, 313; working chamber connecting pipe, 314; C electromagnetic valve, 321; third connecting pipe, 322; fourth connecting pipe, 323; fifth pipeline, 324; sixth pipeline, 326; vacuum pressure switch, 327; vacuum suction head pipeline, 328; vacuum filter, 329; pressure storage tank, 21; third pipeline control component, 22; B electromagnetic valve, 221; seventh pipeline, 222; eighth pipeline, 223; DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0028] Reference Figures 1 to 3 , which is the first embodiment of the present invention, provides a vacuum system for a suction head, which includes a vacuum drive component 1, a pressure storage component 2, and a vacuum control component 3. Through the cooperation of the vacuum drive component 1, the pressure storage component 2, and the vacuum control component 3, positive pressure and negative pressure of the suction head can be achieved.

[0029] Specifically, it includes a vacuum drive component 1, a pressure storage component 2, and a vacuum control component 3; the vacuum drive component 1 is connected to the vacuum control component 3, the pressure storage component 2 is connected to the vacuum control component 3, and the vacuum control component 3 is respectively connected to the suction head and the working chamber; the vacuum drive component 1 can perform vacuum extraction on the pressure storage component 2 through the vacuum control component 3, and the vacuum control component 3 cooperates with the pressure storage component 2 and the vacuum drive component 1 to form positive or negative pressure on the suction head, and the sample tube is sucked or placed through the suction head.

[0030] Furthermore, the vacuum control component 3 includes a first pipeline control component 31 and a second pipeline control component 32; the vacuum drive component 1 is connected to the first pipeline control component 31 and the second pipeline control component 32 respectively, the first pipeline control component 31 and the second pipeline control component 32 can be communicated, and the second pipeline control component 32 is connected to the pressure storage component 2.

[0031] Furthermore, the first pipeline control component 31 includes an A solenoid valve 311, a first connecting pipe 312, a second connecting pipe 313, and a working chamber connecting pipe 314; the first connecting pipe 312 connects the A solenoid valve 311 and the vacuum drive component 1, and the second connecting pipe 313 is connected to the A solenoid valve 311 and the working chamber connecting pipe 314.

[0032] Preferably, the working chamber connecting pipe 314 is connected to the operating chamber, and the working chamber connecting pipe 314 can prevent external gas from destroying the dry environment in the working chamber and preventing mechanical equipment or samples from frosting.

[0033] Furthermore, the second pipeline control component 32 includes a C solenoid valve 321, a third connecting pipe 322 and a fourth connecting pipe 323; the third connecting pipe 322 is connected to the C solenoid valve 321 and the vacuum drive assembly 1, and the fourth connecting pipe 323 is connected to the C solenoid valve 321 and the working chamber connecting pipe 314.

[0034] Furthermore, the second pipeline control component 32 also includes a fifth pipeline 324, a sixth pipeline 326, a vacuum pressure switch 327, and a vacuum suction head pipeline 328; the fifth pipeline 324 is connected to the vacuum pressure switch 327 and the C solenoid valve 321, the sixth pipeline 326 is connected to the fifth pipeline 324 and the pressure storage component 2, and the vacuum pressure switch 327 is connected to the vacuum suction head pipeline 328.

[0035] Preferably, by opening and closing the internal ports of the A solenoid valve 311, the C solenoid valve 321, and the B solenoid valve 221, a series loop can be formed with the corresponding pipelines.

[0036] Furthermore, one side of the vacuum suction head pipeline 328 is connected to a vacuum filter 329 , and the vacuum filter 329 is arranged on the side of the vacuum pressure switch 327 .

[0037] Preferably, the gas contamination can be prevented by providing a vacuum filter 329 .

[0038] Furthermore, the pressure storage assembly 2 includes a pressure storage tank 21 and a third pipeline control component 22 ; the third pipeline control component 22 is connected to the pressure storage tank 21 and the second pipeline control component 32 .

[0039] Furthermore, the third pipeline control component 22 includes a B solenoid valve 221, a seventh pipeline 222, and an eighth pipeline 223; the seventh pipeline 222 is connected to the B solenoid valve 221 and one end of the pressure storage tank 21, and the eighth pipeline 223 is connected to the pressure storage tank 21 and the other end of the B solenoid valve 221.

[0040] Furthermore, the pressure storage tank 21, the A electromagnetic valve 311, the vacuum drive assembly 1, the C electromagnetic valve 321 and the working cabin can form a series circuit, and the pressure storage tank 21 can form a negative pressure.

[0041] Furthermore, the vacuum drive assembly 1 and the A solenoid valve 311, the B solenoid valve 221, the C solenoid valve 321, the pressure storage tank 21, the vacuum filter 329, the vacuum pressure switch 327, the suction head and the working chamber can form a series negative pressure circuit, and the suction head can suck the sample tube under negative pressure.

[0042] Preferably, the sample tube can be sucked under negative pressure through the suction head to achieve the tube picking work.

[0043] Preferably, the vacuum drive assembly 1 includes a vacuum pump, through which the pressure storage tank 21 can be evacuated.

[0044] Furthermore, the vacuum drive assembly 1, the A solenoid valve 311, the C solenoid valve 321, the vacuum pressure switch 327, the vacuum filter 329, the suction head and the working chamber can form a series positive pressure circuit, and the suction head can place the sample tube under positive pressure.

[0045] In summary, the two pipelines of the vacuum system are connected to the suction head and the working cabin respectively, and the negative pressure vacuum suction pipe and the positive pressure vacuum release pipe of the vacuum suction head are realized by controlling the opening and closing of the three sets of solenoid valves. Moreover, the gas comes from the working cabin connected by another pipeline, so as to achieve full closure and avoid the introduction of external gas to destroy the dry environment in the working cabin and cause frost / ice on samples or equipment parts in the low-temperature storage area. Example 2

[0046] Reference Figure 4 , which is the second embodiment of the present invention, based on embodiment 1, further includes a vacuum system operation method, including the following method: S1: The vacuum drive assembly 1 is powered on and the system starts to operate; S2: A solenoid valve 311, B solenoid valve 221, C solenoid valve 321 are all in the power-off state: the 2-way port and 3-way port of A solenoid valve 311, B solenoid valve 221, C solenoid valve 321 are all connected, and the pressure storage tank 21 is in the disconnected and closed state; at this time, the working cabin, the 3-way 2-way port of C solenoid valve 321, the vacuum drive component 1, the 2-way 3-way port of A solenoid valve 311, and the pressure storage tank 21 form a series connection, the gas in the pressure storage tank 21 is pumped into the working cabin, the pressure storage tank 21 forms a negative pressure, and the other components are not involved in the gas circuit for the time being; S3: A solenoid valve 311 and C solenoid valve 321 are in de-energized state, and B solenoid valve 221 is in energized state: the 2-way port and 3-way port of A solenoid valve 311 and C solenoid valve 321 are both connected, and the 2-way port and 1-way port of B solenoid valve 221 are connected. At this time, the suction head, vacuum pressure switch 327, vacuum filter 329, 2-way port and 1-way port of B solenoid valve 221, pressure storage tank 21, 3-way and 2-way ports of A solenoid valve 311, vacuum drive component 1, 2-way port and 3-way port of C solenoid valve 321, and working cabin form a series circuit, and negative pressure at the suction head sucks the cryopreservation tube, and the vacuum pressure switch 327 feeds back a negative pressure suction signal; S4: A solenoid valve 311 and C solenoid valve 321 are energized, and B solenoid valve 221 is de-energized: the 2-way port and 1-way port of A solenoid valve 311 and C solenoid valve 321 are connected, and the pressure storage tank 21 is in the open closed state. At this time, the suction head, vacuum pressure switch 327, vacuum filter 329, 2-way port and 1-way port of C solenoid valve 321, vacuum drive component 1, 1-way and 2-way ports of A solenoid valve 311, and working cabin form a series circuit, and the positive pressure at the suction head releases the cryopreservation tube; at the same time, both ends of the pressure storage tank 21 are closed to maintain a negative pressure state.

[0047] S5: Cycle steps 3 and 4, and use the suction tip to suck the cryotube under negative pressure and place it under positive pressure.

[0048] S6: The pipe picking task is completed, the three sets of solenoid valves and the vacuum drive component 1 are powered off, and the system stops running.

[0049] In summary, the present invention connects the suction head and the working cabin respectively through two pipelines of the vacuum system, and realizes the negative pressure vacuum suction pipe and the positive pressure vacuum release pipe of the vacuum suction head respectively by controlling the opening and closing of three groups of solenoid valves. Moreover, the gas comes from the working cabin connected by another pipeline, so as to achieve full closure and avoid the introduction of external gas to destroy the dry environment in the working cabin and cause frost / ice on samples or equipment parts in the low-temperature storage area.

[0050] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0051] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0052] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A vacuum system for a suction head, characterized in that: The invention comprises a vacuum drive component (1), a pressure storage component (2), and a vacuum control component (3); the vacuum drive component (1) is connected to the vacuum control component (3), the pressure storage component (2) is connected to the vacuum control component (3), and the vacuum control component (3) is respectively connected to the suction head and the working chamber; the vacuum drive component (1) can perform vacuum extraction on the pressure storage component (2) through the vacuum control component (3), and the vacuum control component (3) cooperates with the pressure storage component (2) and the vacuum drive component (1) to form a positive pressure or a negative pressure on the suction head, so as to suck or place a sample tube through the suction head.

2. The vacuum system for a suction head according to claim 1, characterized in that: The vacuum control component (3) comprises a first pipeline control component (31) and a second pipeline control component (32); the vacuum drive component (1) is connected to the first pipeline control component (31) and the second pipeline control component (32) respectively, the first pipeline control component (31) and the second pipeline control component (32) are communicable, and the second pipeline control component (32) is connected to the pressure storage component (2).

3. The vacuum system for a suction head according to claim 2, wherein: The first pipeline control component (31) comprises an A solenoid valve (311), a first connecting pipe (312), a second connecting pipe (313), and a working chamber connecting pipe (314); the first connecting pipe (312) is connected to the A solenoid valve (311) and the vacuum drive assembly (1), and the second connecting pipe (313) is connected to the A solenoid valve (311) and the working chamber connecting pipe (314).

4. The vacuum system for a suction head according to claim 3, characterized in that: The second pipeline control component (32) comprises a C electromagnetic valve (321), a third connecting pipe (322) and a fourth connecting pipe (323); the third connecting pipe (322) is connected to the C electromagnetic valve (321) and the vacuum drive assembly (1), and the fourth connecting pipe (323) is connected to the C electromagnetic valve (321) and the working chamber connecting pipe (314).

5. The vacuum system for a suction head according to claim 4, characterized in that: The second pipeline control component (32) further comprises a fifth pipeline (324), a sixth pipeline (326), a vacuum pressure switch (327), and a vacuum suction head pipeline (328); the fifth pipeline (324) is connected to the vacuum pressure switch (327) and the C solenoid valve (321), the sixth pipeline (326) is connected to the fifth pipeline (324) and the pressure storage component (2), and the vacuum pressure switch (327) is connected to the vacuum suction head pipeline (328).

6. The vacuum system for a suction head according to claim 5, characterized in that: One side of the vacuum suction head pipeline (328) is connected to a vacuum filter (329), and the vacuum filter (329) is arranged on the side of the vacuum pressure switch (327).

7. The vacuum system for a suction head according to claim 6, characterized in that: The pressure storage assembly (2) comprises a pressure storage tank (21) and a third pipeline control component (22); the third pipeline control component (22) is connected to the pressure storage tank (21) and the second pipeline control component (32).

8. The vacuum system for a suction head according to claim 7, characterized in that: The third pipeline control component (22) comprises a B electromagnetic valve (221), a seventh pipeline (222), and an eighth pipeline (223); the seventh pipeline (222) is connected to the B electromagnetic valve (221) and one end of the pressure storage tank (21), and the eighth pipeline (223) is connected to the pressure storage tank (21) and the other end of the B electromagnetic valve (221).

9. The vacuum system for a suction head according to claim 8, characterized in that: The pressure storage tank (21), the A electromagnetic valve (311), the vacuum drive assembly (1), the C electromagnetic valve (321), and the working chamber can form a series circuit, and the pressure storage tank (21) can form a negative pressure.

10. The vacuum system for a suction head according to claim 9, characterized in that: The vacuum drive assembly (1) and the A solenoid valve (311), the B solenoid valve (221), the C solenoid valve (321), the pressure storage tank (21), the vacuum filter (329), the vacuum pressure switch (327), the suction head and the working chamber can form a series negative pressure circuit, and the suction head can suck the sample tube under negative pressure.

11. The vacuum system for a suction head according to claim 9, wherein: The vacuum drive assembly (1) and the A solenoid valve (311), the C solenoid valve (321), the vacuum pressure switch (327), the vacuum filter (329), the suction head and the working chamber can form a series positive pressure circuit, and the suction head can place the sample tube under positive pressure.

12. A vacuum system operating method, characterized in that: The vacuum system for a suction tip as claimed in claim 10 or 11 further comprises the following operating method; S1: The vacuum drive assembly (1) is powered on and the system starts to operate; S2: the A solenoid valve (311), the B solenoid valve (221), and the C solenoid valve (321) are all in a power-off state: the 2-way port and the 3-way port of the A solenoid valve (311), the B solenoid valve (221), and the C solenoid valve (321) are all connected, and the pressure storage tank (21) is in a disconnected and closed state; at this time, the working cabin, the 3-way 2-way port of the C solenoid valve (321), the vacuum drive assembly (1), the 2-way 3-way port of the A solenoid valve (311), and the pressure storage tank (21) are connected in series, and the gas in the pressure storage tank (21) is pumped into the working cabin, and the pressure storage tank (21) forms a negative pressure, and the other components are not involved in the gas path for the time being; S3: The A solenoid valve (311) and the C solenoid valve (321) are in a de-energized state, and the B solenoid valve (221) is in an energized state: the 2-way port and the 3-way port of the A solenoid valve (311) and the C solenoid valve (321) are both connected, and the 2-way port and the 1-way port of the B solenoid valve (221) are connected. At this time, the suction head, the vacuum pressure switch (327), the vacuum filter (329), the 2-way port and the 1-way port of the B solenoid valve (221), the pressure storage tank (21), the 3-way port and the 2-way port of the A solenoid valve (311), the vacuum drive assembly (1), the 2-way port and the 3-way port of the C solenoid valve (321), and the working chamber form a series circuit, and the negative pressure at the suction head sucks the cryotube, and the vacuum pressure switch (327) feeds back a negative pressure suction signal; S4: The A solenoid valve (311) and the C solenoid valve (321) are in the energized state, and the B solenoid valve (221) is in the de-energized state: the 2-way port and the 1-way port of the A solenoid valve (311) and the C solenoid valve (321) are both connected, and the pressure storage tank (21) is in the disconnected closed state. At this time, the suction head, the vacuum pressure switch (327), the vacuum filter (329), the 2-way port and the 1-way port of the C solenoid valve (321), the vacuum drive assembly (1), the 1-way port and the 2-way port of the A solenoid valve (311), and the working chamber form a series circuit, and the positive pressure at the suction head releases the cryotube; S5: Cycle steps 3 and 4, and use the suction tip to suck the cryotube under negative pressure and place it under positive pressure.

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