CN102735353A - Temperature standard exceeding acousto-optic warning device for refrigeration house - Google Patents
Temperature standard exceeding acousto-optic warning device for refrigeration house Download PDFInfo
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- CN102735353A CN102735353A CN201210244492XA CN201210244492A CN102735353A CN 102735353 A CN102735353 A CN 102735353A CN 201210244492X A CN201210244492X A CN 201210244492XA CN 201210244492 A CN201210244492 A CN 201210244492A CN 102735353 A CN102735353 A CN 102735353A
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Abstract
The invention discloses a temperature standard exceeding acousto-optic warning device for a refrigeration house. The temperature standard exceeding acousto-optic warning device for the refrigeration house comprises a 9V direct-current power source, a reference voltage circuit, a temperature measurement circuit and an acousto-optic indication circuit. The temperature standard exceeding acousto-optic warning device for the refrigeration house is characterized in that an operational amplifier comparer IC (Integrated Circuit) 1 in the reference voltage circuit selects a type of GL7611; and a thermistor Rt in the temperature measurement circuit selects a type of GL16. The frequently-used refrigeration houses, such as a seed bank, a food bank, a fruit bank, an aquatic product bank and the like, request that the temperature in the refrigeration houses is about 5 DEG C. Although a refrigeration house computer online temperature monitoring system has complete functions, the ordinary refrigeration houses do not need complex temperature monitoring systems. The temperature standard exceeding acousto-optic warning device provided by the invention can be widely used for the refrigeration houses with the relatively lower requirement on temperature variation, so that the influence caused by factors that the temperature variation of the refrigeration house can not be manually minded in time because staff and goods enter and exit the conventional refrigeration house frequently can be effectively overcome. The temperature standard exceeding acousto-optic warning device can be monitored by a single point; and a monitoring point is additionally arranged according to actual demands.
Description
Technical field
The invention belongs to temperature automatic control technology field, is about a kind of temperature of ice house audible and visual alarm device that exceeds standard.
Background technology
Use industry freezers such as frequent seed bank, food storage, fruit storehouse, aquatic products storehouse, freezer in use should be regulated temperature controller according to temperature of ice house, and the temperature in the freezer is remained at about 5 ℃, fresh with Keep cool article.If long-time temperature is too high in the freezer, then some article is easy to putrid and deteriorated; Temperature of ice house is crossed and low is not only taken electric power, and some food is freezed and changes taste.Though the function of the online temperature monitoring system of freezer computer is fairly perfect, the temperature variation of real-time online record freezer is arranged, generate the temperature history curve map automatically, the temperature bound is set and is reported to the police, functions such as record and history of printing data.But for freezers such as general vegetables, fruit, aquatic products, they do not need the temperature monitoring system of the control function of so much complicacy.Therefore, it is necessary to develop a kind of circuit structure is simple, cost of manufacture is low, performance is simple and practical, the easy to install temperature of ice house audible and visual alarm device that exceeds standard.
The temperature of ice house of the present invention audible and visual alarm device that exceeds standard can be widely used in temperature variation is required not too harsh freezer, and it is frequent to efficiently solve freezer personnel goods turnover in the past, and temperature of ice house changes the artificial influence of taking care of factor such as untimely.This temperature of ice house exceed standard the audible and visual alarm device can single-point monitoring, also can increase the control point according to actual needs.
Below specify this temperature of ice house relevant technologies content that the audible and visual alarm device relates to that exceeds standard in implementation process.
Summary of the invention
Goal of the invention and beneficial effect: use industry freezers such as frequent seed bank, food storage, fruit storehouse, aquatic products storehouse, require the temperature in the freezer to remain on about 5 ℃, fresh with Keep cool article.Though the function of the online temperature monitoring system of freezer computer is fairly perfect, general freezer does not need the temperature monitoring system of the control function of so much complicacy.The temperature of ice house of the present invention audible and visual alarm device that exceeds standard can be widely used in temperature variation is required not too harsh freezer, and it is frequent to efficiently solve freezer personnel goods turnover in the past, and temperature of ice house changes the artificial influence of taking care of factor such as untimely.This temperature of ice house exceed standard the audible and visual alarm device can single-point monitoring, also can increase the control point according to actual needs.
The circuit working principle: the temperature of ice house audible and visual alarm device that exceeds standard is made up of elements such as amplifier comparer IC1, thermistor Rt and linear potentiometer RP; The 2nd pin end of oppisite phase of amplifier comparer IC1 adds the branch pressure voltage of resistance R 1 and thermistor Rt, and this voltage changes along with the variation of temperature of ice house.The in-phase end of amplifier comparer IC1 adds a reference voltage, and this voltage is equivalent to the preset maximum temperature (5 ℃) of freezer, and the corresponding voltage of this temperature can be tested in freezer by thermometer and confirm.Linear potentiometer RP can adjust the height of preset temperature, and voltage range is adjusted between 2.5～3.6V.
When temperature in the freezer is 5 ℃; The 2nd pin voltage-to-ground of amplifier comparer IC1 is 3V; Therefore the 3rd pin voltage of amplifier comparer IC1 should transfer a little less than 3V, at this moment amplifier comparer IC1 ends, the 6th pin output low level of amplifier comparer IC1; LED is not luminous, and hummer HA does not have electricity and do not work.Temperature in freezer rises; The resistance of thermistor Rt diminishes, and when the 2nd pin voltage of amplifier comparer IC1 was decreased to the reference voltage of the 3rd pin that is lower than amplifier comparer IC1, amplifier comparer IC1 began turning; The 6th pin output of amplifier comparer IC1 has the high level of 8V approximately; LED is lighted, and hummer HA gets electric piping, and shows that at this moment temperature in the freezer is above 5 ℃.This alarm device is installed in the time of will guaranteeing that the user opens cold-storage door, can see the duty of LED away from cold-storage door easily.
Technical characterictic: the temperature of ice house audible and visual alarm device that exceeds standard, it comprises 9V direct supply, reference voltage circuit, temperature sensing circuit and acousto-optic indicating circuit, it is characterized in that:
Reference voltage circuit: form by amplifier comparer IC1, resistance R 2, linear potentiometer RP, resistance R 3; The model that amplifier comparer IC1 selects for use is GL7611; The lever arm of the 3rd pin wiring property potentiometer RP of amplifier comparer IC1; The end of the terminating resistor R2 of linear potentiometer RP, the anodal VCC of the other end connection circuit of resistance R 2, the other end of linear potentiometer RP is through resistance R 3 connection circuit ground GND; The anodal VCC of the 7th pin of amplifier comparer IC1 and the 8th pin connection circuit, the 4th pin connection circuit ground GND of amplifier comparer IC1;
Temperature sensing circuit: form by amplifier comparer IC1, resistance R 4 and thermistor Rt; The model that thermistor Rt selects for use is GL16; The 2nd pin of the termination amplifier comparer IC1 of one end of resistance R 4 and thermistor Rt; The anodal VCC of the other end connection circuit of resistance R 4, the other end connection circuit ground GND of thermistor Rt;
Acousto-optic indicating circuit: form by red light emitting diodes LED, resistance R 1 and hummer HA; One end of resistance R 1 and the positive pole of hummer HA connect the 6th pin of amplifier comparer IC1; The positive pole of the other end sending and receiving optical diode LED of resistance R 1, the negative pole of LED and hummer HA negative pole connection circuit ground GND;
The 9V dc power anode links to each other with circuit anode VCC, 9V dc power cathode connection circuit ground GND.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the present invention provides a temperature of ice house to exceed standard the audible and visual alarm device; The negative pole of 9V direct supply is circuit ground GND in the accompanying drawing 1.
Embodiment
According to temperature of ice house shown in the accompanying drawing 1 exceed standard the circuit working schematic diagram and the description of drawings of audible and visual alarm device; And according to the annexation between the components and parts in the described each several part circuit of summary of the invention, and the components and parts technical parameter described in the embodiment requires to implement to realize the present invention.
The selection of components and parts and technical parameter thereof
IC1 is the amplifier comparer, and the model of selecting for use is GL7611;
Rt is a negative tempperature coefficient thermistor, and the model of selecting for use is GL16;
RP is a linear potentiometer, and its resistance is 1M Ω;
The resistance of resistance R 1 is 470 Ω; The resistance of resistance R 2 and resistance R 4 is 4.7M Ω; The resistance of resistance R 3 is 2.2M Ω;
LED is a light emitting diode, for red light emitting diodes is selected in eye-catching suggestion for use;
HA is that miniwatt hummer, working power are 9V, and hummer requires inside that audio generating circuit is arranged;
Suggestion: the 9V direct supply uses the small-sized stabilized voltage supply of 9V of band alternating current adapter.
Circuit production main points and circuit debugging explanation
The temperature of ice house electronic devices and components performance that the audible and visual alarm device uses that exceeds standard is intact; And the annexation according to components and parts shown in the accompanying drawing 1 is welded; The physics wiring is conscientiously checked and check errorless after, temperature of ice house exceeds standard that the circuit of audible and visual alarm device only need simply debug can operate as normal;
When circuit was adjusted, the 3rd pin voltage-to-ground of adjustment amplifier comparer IC1 was a little less than 3V, with thermistor Rt with plastic bag sealing good after; Being placed on temperature is in 5 ℃ of cold water-cups; With the variation of water temperature in the thermometer monitoring cold water-cup, after 2 minutes, when making the temperature of cold water in thermistor Rt and the cup reach thermal equilibrium; Linear adjustment potentiometer RP a little, make LED just not luminous till;
Then in cold water-cup, add a little tap water a little; During with the water temperature rise to 5.3 in the thermometer monitoring cold water-cup ℃, the 6th pin output voltage of amplifier comparer IC1 becomes 8V, makes LED get electric being lighted; Hummer HA also electric piping, this moment, circuit debugging finished; The temperature of ice house setting value should be confirmed according to actual needs;
The transfinite temperature reflection precision of alarm set of temperature of ice house be+0.3 ℃, can reach the general freezer Alerting requirements that rising is transfinited to temperature.
Claims (2)
1. temperature of ice house audible and visual alarm device that exceeds standard, it comprises 9V direct supply, reference voltage circuit, temperature sensing circuit and acousto-optic indicating circuit, it is characterized in that:
Reference voltage circuit is made up of amplifier comparer IC1, resistance R 2, linear potentiometer RP, resistance R 3; The model that amplifier comparer IC1 selects for use is GL7611; The lever arm of the 3rd pin wiring property potentiometer RP of amplifier comparer IC1; The end of the terminating resistor R2 of linear potentiometer RP, the anodal VCC of the other end connection circuit of resistance R 2, the other end of linear potentiometer RP is through resistance R 3 connection circuit ground GND; The anodal VCC of the 7th pin of amplifier comparer IC1 and the 8th pin connection circuit, the 4th pin connection circuit ground GND of amplifier comparer IC1;
Temperature sensing circuit is made up of amplifier comparer IC1, resistance R 4 and thermistor Rt; The model that thermistor Rt selects for use is GL16; The 2nd pin of the termination amplifier comparer IC1 of one end of resistance R 4 and thermistor Rt; The anodal VCC of the other end connection circuit of resistance R 4, the other end connection circuit ground GND of thermistor Rt;
The acousto-optic indicating circuit is made up of LED, resistance R 1 and hummer HA; One end of resistance R 1 and the positive pole of hummer HA connect the 6th pin of amplifier comparer IC1; The positive pole of the other end sending and receiving optical diode LED of resistance R 1, the negative pole of LED and hummer HA negative pole connection circuit ground GND.
2. the temperature of ice house according to claim 1 audible and visual alarm device that exceeds standard, it is characterized in that: the 9V dc power anode links to each other with circuit anode VCC, 9V dc power cathode connection circuit ground GND.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210244492XA CN102735353A (en) | 2012-07-14 | 2012-07-14 | Temperature standard exceeding acousto-optic warning device for refrigeration house |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210244492XA CN102735353A (en) | 2012-07-14 | 2012-07-14 | Temperature standard exceeding acousto-optic warning device for refrigeration house |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776551A (en) * | 2014-01-29 | 2014-05-07 | 黄宇嵩 | Device for controlling and reminding maximum temperature and minimum temperature of incubator |
| CN110186586A (en) * | 2019-06-04 | 2019-08-30 | 仵军红 | A kind of food inspection thawing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346215A (en) * | 2011-10-10 | 2012-02-08 | 黄宇嵩 | Low-voltage alarm circuit with general battery pack |
| CN102706094A (en) * | 2012-06-28 | 2012-10-03 | 黄勇 | Refrigeration house temperature overrun reminding device |
| CN202693155U (en) * | 2012-07-14 | 2013-01-23 | 何林 | Optic-acoustic alarm for excessive temperature of refrigeration storage |
-
2012
- 2012-07-14 CN CN201210244492XA patent/CN102735353A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346215A (en) * | 2011-10-10 | 2012-02-08 | 黄宇嵩 | Low-voltage alarm circuit with general battery pack |
| CN102706094A (en) * | 2012-06-28 | 2012-10-03 | 黄勇 | Refrigeration house temperature overrun reminding device |
| CN202693155U (en) * | 2012-07-14 | 2013-01-23 | 何林 | Optic-acoustic alarm for excessive temperature of refrigeration storage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776551A (en) * | 2014-01-29 | 2014-05-07 | 黄宇嵩 | Device for controlling and reminding maximum temperature and minimum temperature of incubator |
| CN110186586A (en) * | 2019-06-04 | 2019-08-30 | 仵军红 | A kind of food inspection thawing apparatus |
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Application publication date: 20121017 |