CN203508051U - Temperature control pipetting device - Google Patents
Temperature control pipetting device Download PDFInfo
- Publication number
- CN203508051U CN203508051U CN201320656101.5U CN201320656101U CN203508051U CN 203508051 U CN203508051 U CN 203508051U CN 201320656101 U CN201320656101 U CN 201320656101U CN 203508051 U CN203508051 U CN 203508051U
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- liquid
- temperature control
- ozzle
- temperature
- thermistor
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Abstract
The utility model relates to a temperature control pipetting device which mainly comprises a suction hole, a mouthpiece, a heating wire, a thermosensitive resistor, a shell and a temperature control circuit board, wherein temperature control circuits comprise a bridge type differential comparison circuit and a pressure control current source circuit which are electrically connected with each other. During pipetting, the thermosensitive resistor is used for collecting the temperature of the mouthpiece; the bridge type differential comparison circuit is used for controlling the on and off of a voltage-controlled current source to control heating of the heating wire, so that the temperatures of the mouthpiece and liquid can be controlled, and can be in dynamic balance. According to the temperature control pipetting device, the circuits for heating and temperature control are arranged on a common pipetting device, so that the pipetting operation can be executed at the temperature required by liquid subjected to pipetting, particularly, some solid materials, which are melted by heating, can be subjected to pipetting, and the problem that the materials are condensed into solids in a process of pipetting the solid materials by the conventional pipetting device is solved.
Description
Technical field
The utility model relates to a kind of liquid-transfering device, particularly relates to a kind of liquid-transfering device of temperature controllable.
Background technology
Liquid-transfering device is used in extraction and the move operation that chemistry, biological and medical field carry out fluid sample conventionally, as the people's such as Li Ye patent " pipettor " (ZL200620084372.8) designs and carries out the extraction of medical sample to hospital laboratory.
Under normal conditions, liquid-transfering device carries out pipetting to fluid sample at normal temperatures or in insulating box, and this fluid sample keeps temperature consistent whole in moving liquid process.But in some occasion, may need the fluid sample of heating to carry out pipetting, and cannot guarantee isoperibol.One is typically applied as when development atomic clock, the pipetting of caesium material.Caesium material is solid at normal temperatures, when development atomic clock, caesium material need to be transferred in the resonator preparing from the glass envelope of encapsulation.Actual, while carrying out pipetting, need first to caesium material, to be heated to 40 ℃ of left and right and become liquid, then by being transferred to the resonator preparing after liquid-transfering device extracting liq caesium.Because transfer process is to carry out in the anhydrous special instrument of anaerobic, cannot guarantee that transfer process environment temperature perseverance is 40 ℃, therefore often appearing at liquid caesium in transfer process condenses into solids adhering on the ozzle of liquid-transfering device, causes the failure of pipetting.
Utility model content
The purpose of this utility model is the defect for prior art, provides a kind of temperature control liquid-transfering device to realize the transfer to liquid under temperature constant state.
For achieving the above object, the utility model provides a kind of temperature control liquid-transfering device, and described device comprises for drawing or discharge the suction inlet of liquid to be pipetted; Ozzle, is conducted with described suction inlet; Heater strip, is wrapped in described ozzle outside, after energising, described ozzle is heated; Thermistor, is fixed on described ozzle outside, detects the temperature of described liquid in described ozzle; Housing, is connected with described ozzle by a push rod, and described liquid is contained in described housing after entering described ozzle by described suction inlet after described heater strip heating; Temperature control circuit board, be fixed on described hull outside, described temperature control circuit board is electrically connected to described heater strip and thermistor, thereby for described heater strip power supply makes described heater strip heating, and utilize described thermistor to detect the temperature of the liquid of the described thermistor of flowing through.
Preferably, the heat-insulation layer material in described ozzle outside is insulation material.
Preferably, described housing has the display window that shows amount of liquid accommodating in described housing.
Preferably, on described display window, there is graduation mark.
Described temperature control circuit has bridge-type differential comparison circuit and the voltage controlled current source circuit of mutual electrical connection, described bridge-type differential comparison circuit is electrically connected to described thermistor, and described thermistor gathers the temperature of described ozzle and controls the break-make of described bridge-type differential comparison circuit; Described voltage controlled current source circuit is electrically connected to described heater strip.
The utility model has the advantages that and can guarantee to carry out pipetting at the temperature of moved liquid requirement; Can carry out pipetting to the solid material of fusing after some heating especially, avoid adopting traditional liquid-transfering device condensation of materials in carrying out solid material and move the process of liquid to become the problem of solid.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the temperature control liquid-transfering device of a kind of embodiment of the present utility model;
Fig. 2 is the front elevation of the temperature control liquid-transfering device of a kind of embodiment of the present utility model;
Fig. 3 is the reverse side figure of the temperature control liquid-transfering device of a kind of embodiment of the present utility model.
Wherein:
10-suction inlet; 20-ozzle; 30-temperature control circuit board; 31-heater strip; 32-thermistor; 33-heat-insulation layer; 34-electric wire; 40-battery module; 50-housing; 60-push rod; 70-display window; 80-suction inlet pusher; 90-action button
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Temperature control liquid-transfering device of the present utility model not only can carry out pipetting to common liq, can also be to there being the liquid of temperature requirement to move liquid.
Fig. 1 is the circuit structure diagram of the temperature control liquid-transfering device of a kind of embodiment of the present utility model, as shown in the figure, temperature control liquid-transfering device mainly comprises suction inlet 10, ozzle 20, heater strip 31, thermistor 32, housing 50(Fig. 2), push rod 60, temperature control circuit board 30, heat-insulation layer 33, electric wire 34, battery module 40.
Fig. 2 is the front elevation of the temperature control liquid-transfering device of a kind of embodiment of the present utility model, Fig. 3 is the reverse side figure of the temperature control liquid-transfering device of a kind of embodiment of the present utility model, shown in Fig. 2 and Fig. 3, temperature control liquid-transfering device also comprises display window 70, suction inlet pusher 80, action button 90 except comprising the structure in Fig. 3.Display window 70, is positioned at the front in housing 50 outsides, for showing the interior accommodating amount of liquid of housing 50, on display window 70, can also have scale, for observing measuring of housing 50 interior liquid.Suction inlet pusher 80 is positioned at the rear end of housing 50, for the release work of suction inlet 10, and can be easily by its release when needs are changed suction inlet 10.Action button 90 is positioned at the rear end of housing 50, for controlling absorption and the release of liquid to be pipetted.
The vertical state that keeps whole temperature control liquid-transfering device, the suction inlet of temperature control pipettor 10 is inserted under liquid levels to be moved, pressing operation button 90 imbititions, liquid is inhaled in housing 50 through ozzle 20 from container, now by moving liquid window, can observe the amount of liquid of absorption; During releasing liquid, temperature control liquid-transfering device is moved to the position needing, keep the vertical state of temperature control liquid-transfering device, pressing operation button 90 releasing liquids, liquid will discharge through ozzle and suction inlet from housing 50 is interior; While changing suction inlet 10, press suction inlet pusher 80 and can eject suction inlet 10.
Below in conjunction with Fig. 1, Fig. 2, Fig. 3, the liquid process of specifically moving of the embodiment of the utility model temperature control liquid-transfering device is done to following elaboration.
Step a, suppose moved material to move the temperature that liquid process need keeps be 40 °, table look-up thermistor 32 at 40 ° of corresponding resistance value r
0, by variable resistor R
2, R
3, R
4resistance be all set to r
0when switching on power, because the temperature of ozzle 20 is lower, need first preheating ozzle 20, now, the resistance of thermistor 32 is also larger, electric bridge is in non-equilibrium state, and now comparator A exports high level, transistor BG1 conducting, make heater strip 31 in conducting heated condition, so the temperature of ozzle 20 constantly raise.Along with the rising of ozzle 20 temperature, the resistance of thermistor 32 reduces thereupon, and electric bridge tends to balance gradually, when the heat producing when heater strip 31 equates with the heat of ozzle 20 dissipation, i.e. and the resistance of thermistor 32 and variable resistor R
2, R
3, R
4resistance while equating, system is in poised state, now the temperature of ozzle 20 keeps constant substantially.Temperature slightly changes the imbalance that will cause electric bridge, and then makes temperature control circuit in new dynamic balance state, and therefore the sensitivity of temperature control liquid-transfering device of the present utility model is very high, can reach good temperature control effect.
Step b, the vertical state of maintenance temperature control liquid-transfering device, four fingers close up the rear end of holding temperature control liquid-transfering device, with thumb press action button 90, imbitition from the liquid having melted, can observe the amount of liquid of absorption by the graduation mark on display window 70.
Step c, slowly lifts temperature control liquid-transfering device, is moved in the container preparing, and by thumb press action button 90, discharges the liquid in temperature control liquid-transfering device, intracavity liquid is drained after, it is whole that to move liquid process operation complete.
The utility model adopts has arranged heating and temperature controlled circuit on common liquid-transfering device, has realized the heating of liquid-transfering device and intracavity liquid and temperature are controlled, and can guarantee to carry out pipetting at the temperature of moved liquid requirement; Can carry out pipetting to the solid material of fusing after some heating especially.And temperature control liquid-transfering device of the present utility model is by thermistor 32, to gather the temperature of ozzle 20, through bridge-type differential comparison circuit, control the break-make of voltage-controlled current source, and then the heating of control heater strip 31, therefore the sensitivity of temperature control liquid-transfering device of the present utility model is very high, can reach good temperature control effect.
The above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a temperature control liquid-transfering device, is characterized in that, described device comprises:
For drawing or discharge the suction inlet of liquid to be pipetted;
Ozzle, is conducted with described suction inlet;
Heater strip, is wrapped in described ozzle outside, after energising, described ozzle is heated;
Thermistor, is fixed on described ozzle outside, detects the temperature of described liquid in described ozzle;
Housing, is connected with described ozzle by a push rod, and described liquid is contained in described housing after entering described ozzle by described suction inlet after described heater strip heating;
Temperature control circuit board, be fixed on described hull outside, described temperature control circuit board is electrically connected to described heater strip and thermistor, thereby for described heater strip power supply makes described heater strip heating, and utilize described thermistor to detect the temperature of the liquid of the described thermistor of flowing through.
2. temperature control liquid-transfering device according to claim 1, is characterized in that, the heat-insulation layer material in described ozzle outside is insulation material.
3. temperature control liquid-transfering device according to claim 1, is characterized in that, described housing has the display window that shows amount of liquid accommodating in described housing.
4. temperature control liquid-transfering device according to claim 3, is characterized in that, on described display window, has graduation mark.
5. temperature control liquid-transfering device according to claim 1, it is characterized in that, described temperature control circuit has bridge-type differential comparison circuit and the voltage controlled current source circuit of mutual electrical connection, described bridge-type differential comparison circuit is electrically connected to described thermistor, and described thermistor gathers the temperature of described ozzle and controls the break-make of described bridge-type differential comparison circuit; Described voltage controlled current source circuit is electrically connected to described heater strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656101.5U CN203508051U (en) | 2013-10-23 | 2013-10-23 | Temperature control pipetting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656101.5U CN203508051U (en) | 2013-10-23 | 2013-10-23 | Temperature control pipetting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203508051U true CN203508051U (en) | 2014-04-02 |
Family
ID=50367036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320656101.5U Expired - Fee Related CN203508051U (en) | 2013-10-23 | 2013-10-23 | Temperature control pipetting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203508051U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521281A (en) * | 2013-10-23 | 2014-01-22 | 中国科学院声学研究所 | Temperature control pipetting device |
| JP2020144142A (en) * | 2015-03-19 | 2020-09-10 | ベックマン コールター， インコーポレイテッド | Dispenser for analyzer |
-
2013
- 2013-10-23 CN CN201320656101.5U patent/CN203508051U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521281A (en) * | 2013-10-23 | 2014-01-22 | 中国科学院声学研究所 | Temperature control pipetting device |
| JP2020144142A (en) * | 2015-03-19 | 2020-09-10 | ベックマン コールター， インコーポレイテッド | Dispenser for analyzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20201023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |