CN103391664B - The water circulation automatic radiating system aging for light fixture and attemperating unit thereof - Google Patents
The water circulation automatic radiating system aging for light fixture and attemperating unit thereof Download PDFInfo
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- 238000000034 method Methods 0.000 claims abstract description 30
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 26
- 230000017525 heat dissipation Effects 0.000 claims description 55
- 239000000758 substrate Substances 0.000 claims description 40
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- 241001465382 Physalis alkekengi Species 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a kind of for water circulation automatic radiating system and attemperating unit thereof, attemperating unit comprises: temperature measurement module, and the temperature transition of water circulation automatic heat radiator is become thermometric voltage signal; Reference voltage module, exports the first and second reference voltages preset; Voltage comparison module, branch compares thermometric voltage signal and the first and second reference voltage signals to obtain the first and second enable signals; Switch module, opens based on the first and second enable signal branches or closes in water circulation automatic heat radiator and outer water circulation.Wherein, by the temperature transition of water circulation automatic radiating system is become voltage signal, and compare the water cycle process of opening or closing water circulation automatic heat radiator with the reference voltage signal preset, principle is simple, is easy to realize.And combination controls Inner eycle and outer circulation, effectively controls in accurate temperature range, and this scope also can flexible as required, thus improves the precision of ageing test.
Description
Technical Field
The invention relates to a heat dissipation system and a temperature control device thereof, in particular to a water circulation automatic heat dissipation system for lamp aging and a temperature control device thereof.
Background
In the reliability detection of electronic equipment, the aging test is one of important detection links. However, since the aging test takes a long time, heat generation of the electronic device during the aging test is an important factor affecting the results of the aging test. This problem is particularly pronounced in ageing tests of lamps, in particular the solid-state light source LEDs which are currently the most promising candidates. Taking a high-power LED as an example, the LED has high luminous efficiency and the luminous efficiency is further improved along with the time, so that the LED generates heat remarkably in the working process. When a laboratory aging test is performed on a high-power LED, the high-power LED needs to be radiated by using a water circulation radiating device, for example. In the process of using the water circulation heat dissipation device to dissipate heat of the high-power LED, there is also a need for a simple and easy-to-operate device to control the water circulation process of the water circulation heat dissipation device, for example, how to turn on the water circulation process when appropriate, and how to turn off the water circulation process when appropriate, so as to ensure that the high-power LED can be aged at an appropriate temperature, so as to obtain an optimal life curve of the light decay and aging of the high-power LED at a certain temperature.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water circulation automatic heat dissipation system and a temperature control device thereof aiming at the defect of complex structure of a device for controlling a water circulation process of a water circulation heat dissipation device in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: provided is a temperature control device for a water circulation automatic heat dissipation device, including:
the temperature measuring module is used for detecting the temperature of the water circulation automatic heat radiating device and converting the temperature into a temperature measuring voltage signal;
a reference voltage module including a first reference voltage unit and a second reference voltage unit for outputting a preset first reference voltage and a preset second reference voltage, respectively, wherein the second reference voltage is different from the first reference voltage;
the voltage comparison module comprises a first voltage comparison unit and a second voltage comparison unit; the two input ends of the first voltage comparison unit are respectively connected with the temperature measurement module and the first reference voltage unit so as to respectively receive the temperature measurement voltage signal and the first reference voltage signal; comparing the temperature measurement voltage signal with the reference voltage signal to generate a first enabling signal; two input ends of the second voltage comparison unit are respectively connected with the temperature measurement module and the second reference voltage unit so as to respectively receive the temperature measurement voltage signal and the second reference voltage signal; generating a second enabling signal by comparing the temperature measuring voltage signal with the reference voltage signal; and
a switch module including a first switch unit and a second switch unit; the first switch unit is connected with the output end of the first voltage comparison module to receive the first enabling signal and starts or closes the internal circulation process of the automatic water circulation heat dissipation device based on the first enabling signal; the second switch unit is connected with the output end of the second voltage comparison module to receive the second enabling signal and starts or closes the external circulation process of the water circulation automatic heat dissipation device based on the second enabling signal.
In the temperature control device for the water circulation automatic heat dissipation device according to the embodiment of the invention, the temperature measurement module comprises a thermistor and a voltage regulation resistor which are connected in series; wherein,
the resistance value of the thermistor is reduced along with the rise of the temperature of the water circulation automatic heat dissipation device;
the common end of the thermistor and the voltage regulating resistor is respectively connected with one input end of the first voltage comparison unit and one input end of the second voltage comparison unit;
the other end of the thermistor is connected with a power supply; and
the other end of the voltage regulating resistor is grounded.
In the temperature control device for a water circulation automatic heat dissipation device according to an embodiment of the present invention, the first voltage comparison unit is a first operational amplifier; the second voltage comparison unit is a second operational amplifier; wherein,
the common end of the thermistor and the voltage regulating resistor is respectively connected with the non-inverting input ends of the first operational amplifier and the second operational amplifier;
the inverting input end of the first operational amplifier is connected with the first reference voltage unit; and the inverting input end of the second operational amplifier is connected with the second reference voltage unit.
In the temperature control device for a water circulation automatic heat dissipating device according to an embodiment of the present invention, the first operational amplifier unit and the second operational amplifier unit are both LM358 type operational amplifiers.
In the temperature control device for a water circulation automatic heat dissipating device according to an embodiment of the present invention,
the first reference voltage unit comprises a first voltage dividing resistor and a second voltage dividing resistor which are connected in series; the common end of the first voltage-dividing resistor and the common end of the second voltage-dividing resistor are connected with the inverting input end of the first operational amplifier, the other end of the first voltage-dividing resistor is connected with the power supply, and the other end of the second voltage-dividing resistor is grounded;
the second reference voltage unit comprises a third voltage dividing resistor and a fourth voltage dividing resistor which are connected in series; the common terminal of the third voltage dividing resistor and the fourth voltage dividing resistor is connected with the inverting input terminal of the second operational amplifier, the other terminal of the third voltage dividing resistor is connected with the power supply, and the other terminal of the fourth voltage dividing resistor is grounded.
In the temperature control device for the water circulation automatic heat dissipation device according to the embodiment of the invention, the first reference voltage unit and the second reference voltage unit are both adjustable power supplies.
In the temperature control device for a water circulation automatic heat dissipating device according to an embodiment of the present invention,
the first switch unit comprises a first field effect transistor and a first relay coil; the grid electrode of the first field effect transistor is connected with the output end of the first operational amplifier, the drain electrode of the first field effect transistor is connected with the coil of the first relay coil, and the source electrode of the first field effect transistor is grounded; the normally open contact of the first relay coil is connected with an electromagnetic valve of the automatic water circulation heat dissipation device, and the internal circulation process of the automatic water circulation heat dissipation device is started or closed by controlling the connection or disconnection of the power supply and the electromagnetic valve;
the second switch unit comprises a second field effect transistor and a second relay coil; the grid electrode of the second field effect transistor is connected with the output end of the second operational amplifier, the drain electrode of the second field effect transistor is connected with the coil of the second relay coil, and the source electrode of the second field effect transistor is grounded; and the normally open contact of the second relay coil is connected with a water pump of the automatic water circulation heat dissipation device, and the external circulation process of the automatic water circulation heat dissipation device is started or closed by controlling the connection or disconnection of an external power supply and the water pump.
The invention also provides a water circulation automatic heat dissipation system for lamp aging, which comprises:
the water circulation automatic heat dissipation device is used for dissipating heat of the lamp through water circulation; and
the temperature control device of any one of the above embodiments is configured to turn on or off a water circulation process of the water circulation automatic heat dissipation device by detecting a temperature of the water circulation automatic heat dissipation device.
In the water circulation automatic heat dissipation system according to the embodiment of the invention, the lamp comprises a heat conduction substrate and a light source arranged on the heat conduction substrate; wherein,
the heat conducting substrate is arranged on the water circulation automatic heat dissipation device to dissipate heat through the water circulation automatic heat dissipation device; and
and a temperature measuring module of the temperature control device is arranged on the heat conducting substrate to detect the temperature of the heat conducting substrate.
In the water circulation automatic heat dissipation system according to the embodiment of the invention, the light source is a high-power LED.
The invention has the following beneficial effects: in the temperature control device, the temperature of the water circulation automatic heat dissipation device is converted into a voltage signal and is compared with a preset reference voltage signal, so that the water circulation process of the water circulation automatic heat dissipation device is started or closed based on a comparison result, the principle is simple, and the realization is easy. In addition, the temperature control device can effectively control the water circulation automatic heat dissipation device within an accurate temperature range by controlling the internal circulation and the external circulation of the water circulation automatic heat dissipation device in a combined manner, and the range can be flexibly adjusted according to requirements, so that the precision of an aging test is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a logic block diagram of a water-circulating automatic heat dissipation system according to an embodiment of the present invention;
FIG. 2 is a logic block diagram of an automatic heat dissipation system with water circulation according to another embodiment of the present invention;
FIG. 3 is an exemplary circuit schematic of the temperature control device of FIG. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a logic block diagram of a water circulation automatic heat dissipation system for lamp aging according to an embodiment of the present invention, which includes a water circulation automatic heat dissipation device 200 and a temperature control device 100. The water circulation automatic heat dissipation device 200 is used for dissipating heat of the lamp in the aging process of the lamp through water circulation. The temperature control device 100 is used for detecting the temperature of the automatic water circulation heat sink 200 and turning on or off the water circulation process of the automatic water circulation heat sink 200 based on the temperature, so as to maintain the automatic water circulation heat sink 200 at a preset temperature value or within a preset temperature range.
The water circulation automatic heat dissipating device 200 includes a water tank for performing water circulation, on which a lamp to be aged is placed. The lamp comprises a heat conduction substrate and a light source arranged on the heat conduction substrate. The thermally conductive substrate may be a metal substrate, such as an aluminum substrate. The lamps include, but are not limited to, tungsten lamps, gas lamps, solid light sources, etc., and the solid light source LED (particularly, a high power LED) will be described as an example below. The heat conduction base plate can be effectively with heat transfer to the water tank on the light source to the hydrologic cycle process is through dispelling the heat to the water tank, specifically through dispelling the heat to the heat conduction base plate on the water tank, thereby realizes the heat dissipation to lamps and lanterns.
As shown in fig. 1, the temperature control device 100 includes a temperature measuring module 110, a reference voltage module 130, a voltage comparison module 120, and a switch module 140.
The temperature measuring module 110 can detect the temperature of the water circulation automatic heat dissipating device 200, specifically, detect the temperature of the heat conducting substrate disposed on the water circulation automatic heat dissipating device 200, and convert the temperature into a temperature measuring voltage signal. Because the high-power LED for testing is mounted on the heat-conducting substrate, and the heat-conducting substrate has thermal conductivity, the temperature measuring module 110 substantially detects the temperature of the high-power LED.
The reference voltage module 130 outputs a preset reference voltage, which may be preset based on a rated operating temperature of the high power LED. For example, the reference voltage corresponds to a threshold temperature of the thermally conductive substrate.
Two input ends of the voltage comparison module 120 are respectively connected with the temperature measurement module 110 and the reference voltage module 130, so as to respectively receive the temperature measurement voltage signal and the reference voltage signal; and comparing the temperature measurement voltage signal with the reference voltage signal to obtain an enable signal, for example, when the working temperature of the heat conduction substrate corresponding to the temperature measurement voltage signal exceeds a threshold temperature, obtaining the enable signal for starting water circulation.
The switch module 140 is connected to the output terminal of the voltage comparison module 120 to receive the enable signal, and turns on or off the water circulation process of the water circulation automatic heat dissipation device 200 based on the enable signal.
Fig. 2 shows a logic block diagram of a water circulation automatic heat dissipating system according to a preferred embodiment of the present invention, in which a water circulation automatic heat dissipating apparatus 200 includes an internal circulation process in a water tank and an external circulation process of the water tank with the outside. Because the heat conduction substrate is positioned at a certain part of the water tank, the temperature of the part is higher than the temperature of other parts in the water tank in the aging process, and the internal circulation can be carried out to dissipate the heat of the part. When the integral temperature of the water in the water tank is higher and the internal circulation can not be used for heat dissipation, the hot water in the water tank and the cold water outside the water tank can be subjected to external circulation, so that the temperature of the water tank is further reduced, and the high-power LED can be dissipated. The water circulation automatic heat dissipation device 200 can control the opening or closing of the internal circulation through the electromagnetic valve 210, and can control the opening or closing of the external circulation through the water pump 220.
As shown in fig. 2, in the temperature control device 100, the reference voltage module includes a first reference voltage unit 131 and a second reference voltage unit 132, which respectively output a preset first reference voltage and a preset second reference voltage, wherein the second reference voltage is different from the first reference voltage. Similarly, the first reference voltage and the second reference voltage are both set based on the rated operating temperature of the heat-conducting substrate, wherein the threshold temperature of the heat-conducting substrate corresponding to the first reference voltage is lower than the threshold temperature of the heat-conducting substrate corresponding to the second reference voltage.
The voltage comparison module includes a first voltage comparison unit 121 and a second voltage comparison unit 122; two input ends of the first voltage comparison unit 121 are respectively connected with the temperature measurement module and the first reference voltage unit 131 to respectively receive the temperature measurement voltage signal and the first reference voltage signal; and comparing the temperature measurement voltage signal with the reference voltage signal to obtain a first enable signal. Two input ends of the second voltage comparing unit 122 are respectively connected with the temperature measuring module and the second reference voltage unit 132 to respectively receive the temperature measuring voltage signal and the second reference voltage signal; and obtaining a second enable signal by comparing the temperature measurement voltage signal with the reference voltage signal. In other words, the operating temperature of the heat conductive substrate corresponding to the temperature measurement voltage signal is compared with the threshold temperature of the heat conductive substrate corresponding to the first reference voltage, and the operating temperature of the heat conductive substrate corresponding to the temperature measurement voltage signal is compared with the threshold temperature of the heat conductive substrate corresponding to the second reference voltage. When above the threshold temperature, an enable signal is obtained that turns on the water cycle.
The switching module includes a first switching unit 141 and a second switching unit 142; the first switch unit 141 is connected to the output terminal of the first voltage comparison module to receive the first enable signal, and turns on or off the internal circulation process of the automatic water circulation heat sink 200 based on the first enable signal. The second switch unit 142 is connected to the output terminal of the second voltage comparison module to receive the second enable signal, and turns on or off the external circulation process of the automatic water circulation heat sink 200 based on the second enable signal.
Fig. 3 shows an exemplary circuit schematic of the temperature control device 100 in fig. 2, and those skilled in the art should understand that the circuit schematic in fig. 3 is only used as an example and not a limitation to the present invention, and each part of the circuit schematic can be independently applied to the temperature control device 100 in the present invention (the temperature control device 100 shown in fig. 1 or fig. 2) or can be applied to the temperature control device 100 in the present invention in whole or in any combination. In addition, the term "connected" as used herein includes direct electrical connection and also includes coupling connection through other electronic devices.
As shown in fig. 3, in actual operation, the working power supply of the temperature control device 100 is a dc low-voltage power supply, and the working power supply of the water circulation automatic heat dissipation device 200 is an ac power supply, so the power supply of the temperature control device 100 in fig. 3 further includes a transformer T1 for reducing the high voltage to the low voltage; a rectifier bridge stack B1 for rectifying the low-voltage; a filter capacitor C1 for filtering the voltage; and the three-terminal voltage stabilizing circuit Q3 (7812) is used for outputting a stable 12V direct-current voltage, and the voltage is filtered by the filter capacitor C2 and then is output as a power supply of the temperature control device 100.
The temperature measuring module comprises a thermistor R5 and a voltage regulating resistor R1 which are connected in series. Wherein, the thermistor R5 is arranged on the heat-conducting substrate and used for detecting the working temperature of the heat-conducting substrate. A Negative Temperature Coefficient (NTC) thermistor R5, for example, may be used, the resistance of which decreases with increasing temperature. The common ends of the thermistor R5 and the voltage regulating resistor R1 are respectively connected with one input end of the first voltage comparing unit 121 and the second voltage comparing unit 122; the other end of the thermistor R5 is connected to a power supply, which is the power supply of the temperature control device 100; and the other end of the voltage regulating resistor R1 is grounded. In this arrangement, when the resistance value of the thermistor R5 changes with the temperature of the heat conductive substrate, the potential difference applied across the voltage-regulating resistor R1 (i.e., the voltage at the common terminal) also changes. For example, when the resistance value of the thermistor R5 decreases with an increase in the temperature of the heat conductive substrate, the potential difference applied across the voltage-regulating resistor R1 (i.e., the voltage of the common terminal) increases. At this time, the voltage signal output by the common terminal is a temperature measurement voltage signal, and the voltage of the common terminal is a temperature measurement voltage.
The first voltage comparing unit 121 is a first operational amplifier 1, and the second voltage comparing unit 122 is a second operational amplifier 2; the first operational amplifier 1 and the second operational amplifier 2 may be both LM358 type operational amplifiers, for example. The common end of the thermistor R5 and the voltage regulating resistor R1 is respectively connected with the non-inverting input ends of the first operational amplifier and the second operational amplifier; the inverting input terminal of the first operational amplifier is connected to the first reference voltage unit 131; the inverting input terminal of the second operational amplifier is connected to the second reference voltage unit 132.
Taking the Negative Temperature Coefficient (NTC) thermistor R5 as an example, when the first reference voltage is lower than the second reference voltage, the first threshold temperature of the thermal conductive substrate corresponding to the first reference voltage is lower than the second threshold temperature corresponding to the second reference voltage. In a specific operation, when the current operating temperature of the heat-conducting substrate is slightly higher than a first threshold temperature (for example, higher than 1 ℃), the voltage (temperature measurement voltage) of the non-inverting input terminal of the first operational amplifier is higher than the voltage (first reference voltage) of the inverting input terminal, the first operational amplifier outputs a high level, the high level is an enable signal for turning on the inner loop, and the inner loop starts. When the current working temperature of the heat-conducting substrate is reduced to be lower than a first threshold temperature through the internal circulation, the voltage (temperature measuring voltage) of the non-inverting input end of the first operational amplifier is lower than the voltage (first reference voltage) of the inverting input end, the first operational amplifier outputs a low level, the low level is an enabling signal for closing the internal circulation, and the internal circulation is ended. If the current working temperature of the heat-conducting substrate cannot be reduced to be lower than the first threshold temperature by the internal circulation, the temperature of the heat-conducting substrate continues to rise and rises to be slightly higher than the second threshold temperature (for example, higher than 1 ℃), the voltage (temperature measurement voltage) of the non-inverting input end of the second operational amplifier is higher than the voltage (second reference voltage) of the inverting input end, the second operational amplifier outputs a high level, the high level is an enable signal for starting the external circulation, the external circulation starts, and the external cold water is introduced for cooling. When the current working temperature of the heat-conducting substrate is reduced to be lower than the second threshold temperature through the external circulation, the voltage (temperature measuring voltage) of the non-inverting input end of the second operational amplifier is lower than the voltage (second reference voltage) of the inverting input end, the second operational amplifier outputs a low level, the low level is an enabling signal for closing the external circulation, and the external circulation is ended. Other cyclic processes are analogized.
The first reference voltage unit 131 and the second reference voltage unit 132 may both be adjustable power supplies, for example, and output voltage values are preset according to a first threshold temperature and a second threshold temperature, respectively. Alternatively, in the example shown in fig. 3, the first reference voltage unit 131 includes a first voltage-dividing resistor R3 and a second voltage-dividing resistor R2 connected in series; the common terminal of the first divider resistor R3 and the second divider resistor R2 is connected to the inverting input terminal of the first operational amplifier, the other terminal of the first divider resistor R3 is connected to the output of the power supply (the power supply of the temperature control device 100), and the other terminal of the second divider resistor R2 is grounded. The second reference voltage unit 132 includes a third voltage dividing resistor R6 and a fourth voltage dividing resistor R7 connected in series; the common terminal of the third voltage dividing resistor R6 and the fourth voltage dividing resistor R7 is connected to the inverting input terminal of the second operational amplifier, the other terminal of the third voltage dividing resistor R6 is connected to the power supply (the power supply of the temperature control device 100), and the other terminal of the fourth voltage dividing resistor R7 is grounded. As can be seen from the above, by adjusting the relative resistance values of the first and second voltage-dividing resistors R3 and R2, the voltage output from the common terminal of the first and second voltage-dividing resistors R3 and R2, i.e., the output voltage of the first reference voltage unit 131, can be adjusted. The second reference voltage unit is similar to this.
The first switching unit 141 includes a first field effect transistor Q1 and a first relay coil; the grid electrode of the first field effect transistor Q1 is connected with the output end of the first operational amplifier 1, the drain electrode of the first field effect transistor Q1 is connected with one end of a coil K11 of the first relay coil, a capacitor C3 is connected between the source electrode and the grid electrode of the first field effect transistor Q1, and the source electrode is also grounded; the other end of the coil K11 of the first relay coil is connected to the moving contact of the first relay, the normally open contact of the first relay is connected to the solenoid valve 210 of the automatic water circulation radiator 200, and the internal circulation process of the automatic water circulation radiator 200 is turned on or off by controlling the connection or disconnection of the power supply (here, the power supply of the temperature control device 100) and the solenoid valve 210.
The second switching unit 142 is a circuit including a second field effect transistor Q2 and a second relay coil; the grid electrode of the second field effect transistor Q2 is connected with the output end of the second operational amplifier 2, the drain electrode of the second field effect transistor Q2 is connected with one end of a coil K12 of the second relay coil, a capacitor C4 is connected between the source electrode and the grid electrode of the second field effect transistor Q2, and the source electrode is also grounded; the normally open contact of the second relay coil is connected with the water pump 220 of the automatic water circulation heat dissipation device 200, and the external circulation process of the automatic water circulation heat dissipation device 200 is turned on or off by controlling the connection or disconnection of the external power supply and the water pump 220.
Taking the Negative Temperature Coefficient (NTC) thermistor R5 and the first and second voltage comparing units 122 as an operational amplifier as an example, when the first enable signal is at a high level, the first field effect transistor Q1 is turned on, the first relay coil is energized, the normally open contact K12 is closed, the solenoid valve 210 is turned on, and the internal cycle begins. When the second enable signal is at a high level, the second field effect transistor Q2 is turned on, the second relay coil is energized, the normally open contact K22 is closed, the water pump 220 is connected with the external power supply, and the external cycle begins.
As can be seen from the above, in the temperature control device of the present invention, the temperature of the heat conductive substrate is converted into the voltage signal, and the voltage signal is compared with the preset reference voltage signal, so that the water circulation process of the water circulation automatic heat dissipation device is turned on or off based on the comparison result, and the principle is simple and easy to implement. For example, the method can be realized by only adopting conventional resistors, thermistors, operational amplifiers and the like, and the cost is low. In addition, the circuit structure is simple, so the operation reliability is high. In addition, the temperature control device can effectively control the heat-conducting substrate within an accurate temperature range by controlling the internal circulation and the external circulation of the water circulation automatic heat dissipation device in a combined manner, and the range can be flexibly adjusted according to requirements, so that the precision of an aging test is improved.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A temperature control device for a water circulation automatic heat dissipation device, comprising:
the temperature measuring module is used for detecting the temperature of the water circulation automatic heat radiating device and converting the temperature into a temperature measuring voltage signal;
a reference voltage module including a first reference voltage unit and a second reference voltage unit for outputting a preset first reference voltage and a preset second reference voltage, respectively, wherein the second reference voltage is different from the first reference voltage;
the voltage comparison module comprises a first voltage comparison unit and a second voltage comparison unit; the two input ends of the first voltage comparison unit are respectively connected with the temperature measurement module and the first reference voltage unit so as to respectively receive the temperature measurement voltage signal and the first reference voltage signal; comparing the temperature measurement voltage signal with the reference voltage signal to generate a first enabling signal; two input ends of the second voltage comparison unit are respectively connected with the temperature measurement module and the second reference voltage unit so as to respectively receive the temperature measurement voltage signal and the second reference voltage signal; generating a second enabling signal by comparing the temperature measuring voltage signal with the reference voltage signal; and
a switch module including a first switch unit and a second switch unit; the first switch unit is connected with the output end of the first voltage comparison module to receive the first enabling signal and starts or closes the internal circulation process of the automatic water circulation heat dissipation device based on the first enabling signal; the second switch unit is connected with the output end of the second voltage comparison module to receive the second enabling signal and starts or closes the external circulation process of the water circulation automatic heat dissipation device based on the second enabling signal;
the temperature measuring module comprises a thermistor and a voltage regulating resistor which are connected in series; wherein,
the resistance value of the thermistor is reduced along with the rise of the temperature of the water circulation automatic heat dissipation device;
the common end of the thermistor and the voltage regulating resistor is respectively connected with one input end of the first voltage comparison unit and one input end of the second voltage comparison unit;
the other end of the thermistor is connected with a power supply; and
the other end of the voltage regulating resistor is grounded.
2. The temperature control device for a water circulation automatic heat dissipating device according to claim 1, wherein the first voltage comparing unit is a first operational amplifier; the second voltage comparison unit is a second operational amplifier; wherein,
the common end of the thermistor and the voltage regulating resistor is respectively connected with the non-inverting input ends of the first operational amplifier and the second operational amplifier;
the inverting input end of the first operational amplifier is connected with the first reference voltage unit; and the inverting input end of the second operational amplifier is connected with the second reference voltage unit.
3. The temperature control device for a water circulation automatic heat dissipating device as claimed in claim 2, wherein the first operational amplifier unit and the second operational amplifier unit are both LM358 type operational amplifiers.
4. The temperature control device for a water circulation automatic heat dissipating device according to claim 2,
the first reference voltage unit comprises a first voltage dividing resistor and a second voltage dividing resistor which are connected in series; the common end of the first voltage-dividing resistor and the common end of the second voltage-dividing resistor are connected with the inverting input end of the first operational amplifier, the other end of the first voltage-dividing resistor is connected with the power supply, and the other end of the second voltage-dividing resistor is grounded;
the second reference voltage unit comprises a third voltage dividing resistor and a fourth voltage dividing resistor which are connected in series; the common terminal of the third voltage dividing resistor and the fourth voltage dividing resistor is connected with the inverting input terminal of the second operational amplifier, the other terminal of the third voltage dividing resistor is connected with the power supply, and the other terminal of the fourth voltage dividing resistor is grounded.
5. The temperature control device for a water circulation automatic heat dissipating device according to claim 2, wherein the first reference voltage unit and the second reference voltage unit are both adjustable power supplies.
6. The temperature control device for a water circulation automatic heat dissipating device according to claim 2,
the first switch unit comprises a first field effect transistor and a first relay coil; the grid electrode of the first field effect transistor is connected with the output end of the first operational amplifier, the drain electrode of the first field effect transistor is connected with the coil of the first relay coil, and the source electrode of the first field effect transistor is grounded; the normally open contact of the first relay coil is connected with an electromagnetic valve of the automatic water circulation heat dissipation device, and the internal circulation process of the automatic water circulation heat dissipation device is started or closed by controlling the connection or disconnection of the power supply and the electromagnetic valve;
the second switch unit comprises a second field effect transistor and a second relay coil; the grid electrode of the second field effect transistor is connected with the output end of the second operational amplifier, the drain electrode of the second field effect transistor is connected with the coil of the second relay coil, and the source electrode of the second field effect transistor is grounded; and the normally open contact of the second relay coil is connected with a water pump of the automatic water circulation heat dissipation device, and the external circulation process of the automatic water circulation heat dissipation device is started or closed by controlling the connection or disconnection of an external power supply and the water pump.
7. A hydrologic cycle automatic cooling system for lamp aging, characterized by comprising:
the water circulation automatic heat dissipation device is used for dissipating heat of the lamp through water circulation; and
the temperature control device of any one of claims 1-6, configured to turn on or off a water circulation process of the water circulation automatic heat sink by detecting a temperature of the water circulation automatic heat sink.
8. The water circulating automatic heat dissipating system of claim 7, wherein the light fixture comprises a heat conducting substrate and a light source disposed on the heat conducting substrate; wherein,
the heat conducting substrate is arranged on the water circulation automatic heat dissipation device to dissipate heat through the water circulation automatic heat dissipation device; and
and a temperature measuring module of the temperature control device is arranged on the heat conducting substrate to detect the temperature of the heat conducting substrate.
9. The water circulating automatic heat dissipating system of claim 8, wherein the light source is a high power LED.
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| CN201210144940.9A CN103391664B (en) | 2012-05-10 | 2012-05-10 | The water circulation automatic radiating system aging for light fixture and attemperating unit thereof |
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| CN201210144940.9A CN103391664B (en) | 2012-05-10 | 2012-05-10 | The water circulation automatic radiating system aging for light fixture and attemperating unit thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201116711Y (en) * | 2007-11-27 | 2008-09-17 | 鹤山丽得电子实业有限公司 | Heat dispersion device for LED lamp |
| WO2009066585A1 (en) * | 2007-11-21 | 2009-05-28 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US7612506B1 (en) * | 2008-05-08 | 2009-11-03 | National Central University | Method for controlling light-emission of a light-emitting diode light source |
| CN101846246A (en) * | 2008-11-25 | 2010-09-29 | 斯坦雷电气株式会社 | Liquid cooled LED light |
| CN102013504A (en) * | 2010-11-05 | 2011-04-13 | 新源动力股份有限公司 | Proton exchange membrane fuel cell test platform temperature control system and control method |
-
2012
- 2012-05-10 CN CN201210144940.9A patent/CN103391664B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009066585A1 (en) * | 2007-11-21 | 2009-05-28 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| CN201116711Y (en) * | 2007-11-27 | 2008-09-17 | 鹤山丽得电子实业有限公司 | Heat dispersion device for LED lamp |
| US7612506B1 (en) * | 2008-05-08 | 2009-11-03 | National Central University | Method for controlling light-emission of a light-emitting diode light source |
| CN101846246A (en) * | 2008-11-25 | 2010-09-29 | 斯坦雷电气株式会社 | Liquid cooled LED light |
| CN102013504A (en) * | 2010-11-05 | 2011-04-13 | 新源动力股份有限公司 | Proton exchange membrane fuel cell test platform temperature control system and control method |
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