CN203950223U - A kind of tinware ware temperature control circuit that melts - Google Patents
A kind of tinware ware temperature control circuit that melts Download PDFInfo
- Publication number
- CN203950223U CN203950223U CN201420277118.4U CN201420277118U CN203950223U CN 203950223 U CN203950223 U CN 203950223U CN 201420277118 U CN201420277118 U CN 201420277118U CN 203950223 U CN203950223 U CN 203950223U
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- CN
- China
- Prior art keywords
- operational amplifier
- tinware
- temperature
- ware
- relay
- 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.)
- Withdrawn - After Issue
Links
- 239000000155 melt Substances 0.000 title claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Control Of Temperature (AREA)
Abstract
The utility model discloses a kind of tinware ware temperature control circuit that melts, comprise operational amplifier and for detection of the temperature sensor that melts tinware utensil temperature, the magnitude of voltage that the input of the in-phase input end of operational amplifier is corresponding with temperature sensor output valve; The inverting input input magnitude of voltage corresponding with melting tinware ware set temperature value of operational amplifier, the switching signal pilot relay that operational amplifier is exported or the break-make of electronic switch, relay or electronic switch are controlled the path of electrical heating elements current supply circuit or are opened circuit.The utlity model has the features such as cost of manufacture is low, control accuracy is high, reliable operation.
Description
Technical field
The utility model relates to a kind of control circuit, especially a kind of tinware ware temperature control circuit that melts.
Background technology
in electric system, often need to connect between forceful electric power and light current, for example, production run to electric energy is measured, regulate, control, signal wire in communication process, the connection of control line, because connecting portion is inevitably in outdoor, plain conductor connected mode is of long duration there will be loose contact phenomenon, especially moist in summer, in muggy weather, very easily oxidation, cause loose contact, make measurement and control signal unstable, thereby the safe reliability to power supply affects, for example, current transformer measuring apparatus, if loose contact meeting causes metering misalignment, to power supply enterprise, cause damage, therefore, generally these contacts site are carried out to soldering connection, to ensure the reliability of its conduction, at present wire is carried out to soldering and connect the general electric soldering iron that adopts, inefficiency, and easily scolding tin is caused to waste in welding process, tinware ware is melted in some employings, but there is no function of temperature control, or the too high waste that causes electric energy of temperature, or the too low welding quality that affects of temperature, though what have has a function of temperature control, but adopt unit controls instrument to carry out temperature control, cost is very high.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of tinware ware temperature control circuit that melts, the features such as cost of manufacture is low, control accuracy is high, reliable operation that it has.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
Melt a tinware ware temperature control circuit, comprise operational amplifier and for detection of the temperature sensor that melts tinware utensil temperature, the magnitude of voltage that the input of the in-phase input end of operational amplifier is corresponding with temperature sensor output valve; The inverting input input magnitude of voltage corresponding with melting tinware ware set temperature value of operational amplifier, the switching signal pilot relay that operational amplifier is exported or the break-make of electronic switch, relay or electronic switch are controlled the path of electrical heating elements Rfz current supply circuit or are opened circuit.
The utility model further improves and is:
For detection of the temperature sensor that melts tinware utensil temperature, be the thermistor RT with positive temperature coefficient (PTC), thermistor RT and divider resistance R2 are just being serially connected in operational amplifier power supply and between power-successively; The magnitude of voltage corresponding with temperature sensor output valve is the pressure drop of resistance R 2; Operational amplifier power supply just with between power-is connected in series divider resistance R1 and adjustable resistance RW successively; The magnitude of voltage corresponding with melting tinware ware design temperature is the pressure drop of adjustable resistance RW.
The output loop series winding relay K M solenoid of operational amplifier, the normally opened contact of relay K M control electrical heating elements Rfz current supply circuit path or open circuit.
The output terminal series limiting resistor R3 of operational amplifier, is provided with voltage stabilizing diode DW between the node that current-limiting resistance R3 and relay K M connect and operational amplifier power-.
The preferred MC33502DR2G operational amplifier of operational amplifier.
The beneficial effect that adopts technique scheme to produce is:
The utility model comprises operational amplifier and for detection of the temperature sensor that melts tinware utensil temperature, the in-phase input end of operational amplifier is inputted the magnitude of voltage corresponding with temperature sensor output valve; The inverting input input magnitude of voltage corresponding with melting tinware ware set temperature value of operational amplifier, when melting tinware utensil temperature lower than setting value, high level signal that operational amplifier is exported, pilot relay or electronic switch are connected electrical heating elements current supply circuit and are carried out electrical heating, when melting tinware utensil temperature and equal to melt tinware ware set temperature value, operational amplifier institute output low level signal, pilot relay or electronic switch cut off electrical heating elements current supply circuit and stop electrical heating, thereby complete melting the automatic control of tinware utensil temperature; The utility model adopts operational amplifier as core control element, and operational amplifier (being called for short " amplifier ") is to have the very circuit unit of high-amplification-factor, and cheap; For detection of the temperature sensor that melts tinware utensil temperature, be the thermistor RT with positive temperature coefficient (PTC), reliable operation price is low, and thermistor RT and divider resistance R2 are just being serially connected in operational amplifier power supply and between power-successively; By voltage grading resistor, realize the conversion of resistance value and voltage, circuit is simple, reliable operation; The magnitude of voltage corresponding with temperature sensor output valve is the pressure drop of resistance R 2; Operational amplifier power supply just with between power-is connected in series divider resistance R1 and adjustable resistance RW successively; Adopt adjustable resistance RW to desired temperature, to adjust according to actual conditions; The magnitude of voltage corresponding with melting tinware ware design temperature is the pressure drop of adjustable resistance RW; The output loop series winding relay K M solenoid of operational amplifier, the normally opened contact of relay K M control electrical heating elements Rfz current supply circuit path or open circuit; Relay price is low, and electric shock capacity is large, reliable operation; The output terminal series limiting resistor R3 of operational amplifier, is provided with voltage stabilizing diode DW between the node that current-limiting resistance R3 and relay K M connect and operational amplifier power-.Adopt flow-limiting voltage-stabilizing circuit to play certain protective effect to operational amplifier, operational amplifier adopts MC33502DR2G operational amplifier.Operational amplifier adopts single power supply mode, and circuit is simple, cost-saving.Therefore, the utlity model has the features such as cost of manufacture is low, control accuracy is high, reliable operation.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
Embodiment is as shown in Figure 1 known, and the present embodiment comprises operational amplifier and for detection of the temperature sensor that melts tinware utensil temperature, the in-phase input end of operational amplifier is inputted the magnitude of voltage corresponding with temperature sensor output valve; The inverting input input magnitude of voltage corresponding with melting tinware ware set temperature value of operational amplifier, operational amplifier process is to melting the relatively break-make of the switching signal pilot relay of output of tinware utensil temperature and its setting value, the path of Control electrical heating elements current supply circuit or open circuit, to complete melting the automatic control of the temperature of tinware ware.
The present embodiment is the thermistor RT with positive temperature coefficient (PTC) for detection of the temperature sensor that melts tinware utensil temperature, and thermistor RT and divider resistance R2 are just being serially connected in operational amplifier power supply and between power-successively; The magnitude of voltage corresponding with temperature sensor output valve is the pressure drop of resistance R 2; Operational amplifier power supply just with between power-is connected in series divider resistance R1 and adjustable resistance RW successively; The magnitude of voltage corresponding with melting tinware ware design temperature is the pressure drop of adjustable resistance RW.
The output loop series winding relay K M solenoid of the present embodiment operational amplifier, the normally opened contact of relay K M control electrical heating elements Rfz current supply circuit path or open circuit.
The output terminal series limiting resistor R3 of the present embodiment operational amplifier, is provided with voltage stabilizing diode DW between the node that current-limiting resistance R3 and relay K M connect and operational amplifier power-.
The present embodiment operational amplifier adopts MC33502DR2G operational amplifier.
Melt tinware ware in use, often because being subject to the impact of environment for use to cause temperature fluctuation, for example, to melting in tinware ware, increase soldering tin block, or at outside work, be subject to the impact of wind, and these disturbing factors can cause the fluctuation of melting tinware utensil temperature, thus the welding quality of having influence on, the utility model can overcome the temperature fluctuation that these interference cause in time, and specific works principle is as follows:
The resistance value with the thermistor RT of positive temperature coefficient (PTC) reduces with the reduction of temperature, the corresponding rising of pressure drop in resistance R 2.Voltage drop value in resistance R 2 is during higher than the pressure drop of adjustable resistance RW, operational amplifier output high level, and the actuating of relay, normally opened contact is closed, and the current supply circuit of electrical heating elements Rfz is that path starts heating; Along with melting tinware utensil temperature, raise, the resistance value of thermistor RT raises, the corresponding reduction of pressure drop in resistance R 2, voltage drop value in resistance R 2 is during lower than the pressure drop of adjustable resistance RW, operational amplifier output low level, relay is failure to actuate, and the current supply circuit of electrical heating elements Rfz opens circuit and does not heat; Thereby complete melting the automatic control of tinware utensil temperature, the desired temperature that melts tinware ware can regulate by adjustable resistance RW.
Claims (5)
1. melt a tinware ware temperature control circuit, it is characterized in that: comprise operational amplifier and for detection of the temperature sensor that melts tinware utensil temperature, the magnitude of voltage that the input of the in-phase input end of described operational amplifier is corresponding with described temperature sensor output valve; The inverting input input magnitude of voltage corresponding with melting tinware ware set temperature value of described operational amplifier, the switching signal pilot relay that described operational amplifier is exported or the break-make of electronic switch, described relay or electronic switch are controlled the path of electrical heating elements current supply circuit or are opened circuit.
2. a kind of tinware ware temperature control circuit that melts according to claim 1, it is characterized in that: the described temperature sensor for detection of melting tinware utensil temperature is the thermistor RT with positive temperature coefficient (PTC), described thermistor RT and divider resistance R2 are just being serially connected in described operational amplifier power supply and between power-successively; The corresponding magnitude of voltage of described temperature sensor output valve is the pressure drop of resistance R 2; Described operational amplifier power supply just with between power-is connected in series divider resistance R1 and adjustable resistance RW successively; The described magnitude of voltage corresponding with melting tinware ware design temperature is the pressure drop of adjustable resistance RW.
3. a kind of tinware ware temperature control circuit that melts according to claim 2, it is characterized in that: the output loop of described operational amplifier series winding relay K M solenoid, the normally opened contact of described relay K M control electrical heating elements Rfz current supply circuit path or open circuit.
4. a kind of tinware ware temperature control circuit that melts according to claim 3, it is characterized in that: the output terminal series limiting resistor R3 of described operational amplifier, is provided with voltage stabilizing diode DW between the node that described current-limiting resistance R3 and relay K M connect and operational amplifier power-.
5. a kind of tinware ware temperature control circuit that melts according to claim 3, is characterized in that: described operational amplifier adopts MC33502DR2G operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277118.4U CN203950223U (en) | 2014-05-28 | 2014-05-28 | A kind of tinware ware temperature control circuit that melts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277118.4U CN203950223U (en) | 2014-05-28 | 2014-05-28 | A kind of tinware ware temperature control circuit that melts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203950223U true CN203950223U (en) | 2014-11-19 |
Family
ID=51892250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277118.4U Withdrawn - After Issue CN203950223U (en) | 2014-05-28 | 2014-05-28 | A kind of tinware ware temperature control circuit that melts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203950223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049654A (en) * | 2014-05-28 | 2014-09-17 | 国家电网公司 | Temperature control circuit of tin melting vessel |
-
2014
- 2014-05-28 CN CN201420277118.4U patent/CN203950223U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049654A (en) * | 2014-05-28 | 2014-09-17 | 国家电网公司 | Temperature control circuit of tin melting vessel |
| CN104049654B (en) * | 2014-05-28 | 2016-11-02 | 国家电网公司 | One melts tinware ware temperature control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141119 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |