CN201454563U - Electric heating constant-temperature water bath kettle - Google Patents
Electric heating constant-temperature water bath kettle Download PDFInfo
- Publication number
- CN201454563U CN201454563U CN2009201115632U CN200920111563U CN201454563U CN 201454563 U CN201454563 U CN 201454563U CN 2009201115632 U CN2009201115632 U CN 2009201115632U CN 200920111563 U CN200920111563 U CN 200920111563U CN 201454563 U CN201454563 U CN 201454563U
- Authority
- CN
- China
- Prior art keywords
- electric
- water bath
- temperature
- control module
- thermometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000005485 electric heating Methods 0.000 title abstract 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Images
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- Devices For Use In Laboratory Experiments (AREA)
- Control Of Temperature (AREA)
Abstract
The utility model discloses an electric heating constant-temperature water bath kettle, relating to a constant-temperature heating device, in particular to an electric heating constant-temperature water bath kettle used in laboratories. The sensing element of the constant-temperature water bath kettle is an electric contact thermometer and is arranged on a bracket above the kettle body; the mercury measuring terminal of the electric contact thermometer is arranged on the porous shelf of the kettle body; one end of an adjusting cap is connected with a control module via leads; and the control module is connected with an electric heating device. At beginning, a magnet steel adjusting cap on the top of the thermometer is rotated to adjust the thermometer joint position so as to reach preset temperature; when temperature changes, the contact and the separation of a metal wire and a mercury column control the switching on and off of the heating device so as to realize constant-temperature heating. The utility model has simple structure and convenient operation and can lower experiment cost.
Description
Technical field
The utility model relates to the electric-heated thermostatic water bath that a kind of constant temperature heating device, particularly laboratory are used.
Background technology
At present, the water-bath that sell the domestic and international market, its basic structure is made up of temperature sensor, heater, control module, pot body.Heating object is put into water, configure temperature by control module, the heater heating by the temperature sensor senses temperature, offers the break-make of control module decision heater.But its cost of existing temperature sensor is too high, causes the market price of water-bath high, can't satisfy the demand of individual's experiment purchase and universities and colleges' mass purchase.
Summary of the invention
In order to remedy the existing expensive deficiency of water-bath, the purpose of this utility model provides a kind of electric-heated thermostatic water bath, and this water-bath is simple in structure, and is easy to use, can reduce experimental cost greatly.
Solving the scheme that technical problem of the present utility model adopts is: utilize adjustable electric contact thermometer (conductivity meter) to replace traditional temperature sensor, be that electric contact thermometer is loaded on pot support that the body top is provided with, the mercury measuring junction of electric contact thermometer places the porous shelf place of pot body, and regulate cap one end by the lead link control module, control module connects electric heater unit again.The core part of this thermometer is the mercury temperature sensing liquid, regulates the wire that cap links to each other with the magnet steel on thermometer top, contact that can be by wire and mercury with separate the break-make of controlling heater, thereby reach heated at constant temperature.
The on-off circuit that the circuit of control module described in the utility model adopts triode and relay to be connected into, connect with electric heater unit in the contact of relay.Described electric contact thermometer is connected between the base stage and emitter stage of triode, and resistance connects between power supply and transistor base, and relay contact is what often open.
Compared with prior art, the beneficial effects of the utility model are: adopt adjustable electric contact thermometer (conductivity meter) as temperature sensor, can intuitively see the speed of variations in temperature.The experiment proved that, under equal conditions, temperature control precision error of the present utility model is controlled at ± 1 ℃ within, meet requirement of experiment.And this thermometer cost is lower.Therefore has easy to operate, simple in structure, cheap advantage.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the circuit diagram of the utility model control module.
Each label is represented successively among the figure: 1. pot body, 2. loam cake, 3. support, 4. porous shelf, 5. electric contact thermometer, 6. control module, 7. electric heater unit, 8. triode, 9. relay.
The specific embodiment
During beginning, the magnet steel on rotary adjustable electric contact thermometer 5 tops is regulated cap, makes its contact be transferred to the position of predetermined temperature. and this moment, the wire of electric contact thermometer 5 did not contact resistance R with mercury
1Conducting makes triode 8 be in conducting state, the normally opened contact closure of relay 9, thus the electric heater unit 7 of series connection is worked on power.When the mercury of electric contact thermometer 5 rises to predetermined temperature, contact with wire, short circuit makes triode 8 base potential reduce, triode 8 is in cut-off state, the collector and emitter electric current is zero, and the normally opened contact of relay 9 disconnects, and electric heater unit 9 stops heating.When being heated fluid temperature decline, the mercury of electric contact thermometer 5 descends thereupon, disconnects mutually with contact wiry, and the initial course of work that circulates has guaranteed that then being heated liquid is in temperature constant state.
Using method of the present utility model is:
(1) will test article (as beaker, test tube etc.) and be placed on the porous shelf 4, and regulate the magnet steel on thermometer top and regulate cap, and make the wire end connecting point position reach design temperature, cover loam cake 2.
(2) connect power supply, the triode 8 in the control module 6 is in conducting state at this moment, the normally opened contact closure of coupled electrical heating relay 9, the liquid in the heater 7 beginning heating kettle bodies 1.Can see intuitively that the mercury in the conductivity meter 5 begins to rise, system is in heated condition.
(3) when being heated liquid and reaching predetermined temperature, mercury in the electric contact thermometer 5 (conductivity meter) touches the wire that links to each other with adjusting knob, this moment conductivity meter two terminal shortcircuits, triode 8 work in the control module 6 end, the normally opened contact that adds electrothermal relay 9 disconnects, heater 7 stops heating, and system reaches predetermined steady temperature.
(4) when being heated the decline of fluid temperature desire, mercury in the conductivity meter descends thereupon, leaves the wire end connecting point position, makes that the triode 8 in the control module 6 is in the saturation conduction state again, repetitive process (2) and (3) therefore can guarantee that system is in temperature constant state.
Claims (3)
1. electric-heated thermostatic water bath device, it is characterized in that: electric contact thermometer is loaded on pot support that the body top is provided with, the mercury measuring junction of electric contact thermometer places the porous shelf place of pot body, and regulates cap one end by the lead link control module, and control module connects electric heater unit again.
2. electric-heated thermostatic water bath device according to claim 1 is characterized in that: the on-off circuit that the circuit of control module adopts triode and relay to be connected into, connect with electric heater unit in the contact of relay.
3. electric-heated thermostatic water bath device according to claim 2 is characterized in that: electric contact thermometer is connected between the base stage and emitter stage of triode, and resistance connects between power supply and transistor base, and relay contact is what often open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201115632U CN201454563U (en) | 2009-06-24 | 2009-06-24 | Electric heating constant-temperature water bath kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201115632U CN201454563U (en) | 2009-06-24 | 2009-06-24 | Electric heating constant-temperature water bath kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201454563U true CN201454563U (en) | 2010-05-12 |
Family
ID=42381910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201115632U Expired - Fee Related CN201454563U (en) | 2009-06-24 | 2009-06-24 | Electric heating constant-temperature water bath kettle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201454563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622422A (en) * | 2016-11-15 | 2017-05-10 | 无锡市跨克微营养素有限公司 | Warm bath equipment |
-
2009
- 2009-06-24 CN CN2009201115632U patent/CN201454563U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622422A (en) * | 2016-11-15 | 2017-05-10 | 无锡市跨克微营养素有限公司 | Warm bath equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20120624 |