CN100507792C - Synchronous control method and system for surface temp and relative humidity of one-board - Google Patents
Synchronous control method and system for surface temp and relative humidity of one-board Download PDFInfo
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- CN100507792C CN100507792C CNB2005100722672A CN200510072267A CN100507792C CN 100507792 C CN100507792 C CN 100507792C CN B2005100722672 A CNB2005100722672 A CN B2005100722672A CN 200510072267 A CN200510072267 A CN 200510072267A CN 100507792 C CN100507792 C CN 100507792C
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Abstract
A method for synchronously controlling relative humidity and surface temperature of single board includes detecting and recording surface temperature of single board and environment temperature of running space for obtaining temperature between Tmin and Tmnx, regulating heat radiation power according to temp D-value be held between set upper limit value and set lower limit value for ensuring relative humidity at single board surface to be les than ambient humidity of single board running space. The control system for realizing said method is also disclosed.
Description
Technical field
The present invention relates to the control technology in the electronics or the communications field, disclose a kind of technology that temperature and relative humidity are controlled especially.
Background technology
As long as the place that needs communication is arranged, just need communication products, generally include the veneer of realizing various functions in the communication products, veneer is to be made of printed board, components and parts, structural member etc., under the situation of energising, realize certain function, therefore in these structures, inevitably use a lot of conducting metals.In order to guarantee the veneer reliably working, generally all need the forced air cooling mode to satisfy the requirement that device junction temperature allows.If the veneer surface temperature is more less than communication products ambient temperature difference, perhaps temperature is also lower, just might cause veneer surface relative humidity bigger, even condensation, cause inefficacies such as veneer circuit corrosion, the reliability of influence communication, and bring enormous economic loss.
Yet the running environment of communication products comprises various geographical environments, particularly as the abominable area of environment such as Red sea, the Gulf of Aden is coastal, badly regional at these environment, air humidity is bigger, if the temperature of veneer superficial layer is more less than the temperature gap of communication products external environment, just may produce condensation, make the veneer surface moisture too high, metalwork is caused corrosion, cause the veneer malfunction, cause communication failure.
Prior art one generally is that veneer and external environment are isolated for being positioned at the anticorrosive measure of taking than the communication products in rugged surroundings area, promptly veneer or module sealing.This technology can be isolated the air of veneer surface and external environment, guarantees that as far as possible the veneer surface moisture is not subjected to the external environment air influence.But sealing directly has influence on the heat radiation of veneer, and when higher, the temperature of veneer may be excessive, can cause the veneer malfunction as day temperature, and in addition, owing to take Sealing Technology, this technical costs is also higher.
Prior art two suitably improves the temperature of rack device interior by changing the air themperature of cooling device controller cabinet equipment inside, guarantees that the temperature rise (with the temperature difference of external environment) of device interior is higher, the relative humidity of coming controller cabinet equipment inside.For example: the patent No. is 97197704.6 Chinese patent, but the reference temperature that is used to adjust air themperature in this technical scheme is fixed, do not carry out accommodation according to the variation of actual environment, therefore fundamentally do not improve the adaptive faculty of veneer itself to changeable ambient humidity, and this scheme is when implementing, improve the air themperature in the whole rack equipment, then reduced the heat radiation temperature difference of veneer surface and device interior, directly caused the reduction of the heat-sinking capability of veneer own.
Summary of the invention
The present invention discloses a kind of synchronisation control means and control system of veneer surface temperature, and when operating in the rugged surroundings in order to solve existing veneer, metal part is divided the problem that is corroded easily.
The control method of a kind of veneer surface temperature and relative humidity comprises the steps:
Detect and write down the surface temperature of described veneer and the environment temperature of running space;
Determine the temperature gap between described surface temperature and the environment temperature;
Adjust the heat radiation power of described veneer according to described temperature gap, make this temperature gap remain on the lower limit T of setting
MinWith higher limit T
MaxBetween, be lower than the ambient humidity of described veneer running space with the relative humidity that guarantees described veneer surface.
Described surface temperature is meant the minimum temperature on described veneer surface.
Described surface temperature is meant the mean value that comprises a plurality of temperature of measuring in the zone in minimum temperature district on described veneer surface; And/or the environment temperature of described veneer running space is the mean value of a plurality of temperature of measuring in described veneer running space.
It is one of following that the method for described adjustment heat radiation power is meant:
When described temperature gap is lower than T
MinThe time, reduce or close described heat radiation power;
When described temperature gap is higher than T
MaxThe time, improve described heat radiation power;
When described temperature gap is being greater than or equal to T
MinAnd be less than or equal to T
MaxBetween the time, keep described heat radiation power.
Described method comprises that also working as described temperature gap is lower than T
MinThe time, described veneer is heated to surface temperature is equal to or greater than T
MinStep.
Described heat radiation power is meant: the wind-force that provides by radiator fan, and adjust this wind-force by the rotating speed of adjusting this fan; And/or the cooling Power that provides by heat exchange equipment, and adjust this cooling Power by the rate of heat exchange of adjusting this heat exchange equipment.
Described lower limit T
MinMore than or equal to 8 ℃ and smaller or equal to 14 ℃, higher limit T
MaxMore than or equal to 18 ℃ and smaller or equal to 24 ℃.
Described lower limit T
MinEqual 10 ℃, higher limit T
MaxEqual 20 ℃.
The synchronous control system of a kind of veneer surface temperature and relative humidity, comprise heat dissipation equipment that heat radiation power is provided and the control chip of controlling this heat dissipation equipment running status, also comprise: be arranged on first temperature sensor on described veneer surface, detect described veneer surface temperature, and this surface temperature is sent to described control chip; Be arranged near the described veneer and keep second temperature sensor of spacing with this veneer, detect described veneer operation environment temperature, and this environment temperature is sent to described control chip; Described control chip determines that described surface temperature exceeds the temperature gap of environment temperature, and adjusts the heat radiation power of described heat dissipation equipment according to described temperature gap.
Described first temperature sensor and/or second temperature sensor be parallel respectively to be set to a plurality ofly, and described control chip calculates the mean value of a plurality of described surface temperatures and environment temperature respectively, determines described temperature gap with two mean values that calculate.
Described control system also comprises the power device that is arranged on the described veneer, connects the working power of this veneer by switch, and described switch is turned on and off according to described temperature gap by described control chip.
Described power device is at least one diode and/or triode; Described heat dissipation equipment is radiator fan and/or heat-exchange apparatus.
Described veneer comprises urethane resin layer or the organosilicon elastoplasticity resin bed that is coated in all surfaces zone or part surface zone.
Beneficial effect of the present invention is as follows:
Because the present invention is by the difference between control veneer surface temperature and the operating ambient temperature, control the relative humidity on veneer surface, on the one hand, when the veneer surface temperature is too high, improve the heat radiation power of veneer, on the other hand, cross when low in the veneer surface temperature, reduce the heat radiation power of veneer, and can be implemented as the veneer heating, so no matter how running environment changes, the surface temperature of veneer is maintained near the preferable exothermic temperature, can not produce condensation, can not make veneer spend heat affecting reliability and serviceable life yet, improve the environmental suitability of veneer because of the change of ambient humidity;
Because directly control veneer temperature is than the easier enforcement of direct controlled humidity, so the method for the invention and system operation are simple, easy to maintenance, under rugged surroundings, can effectively reduce the maintenance cost of veneer, the serviceable life of raising veneer.
Description of drawings
Fig. 1 is the process flow diagram of veneer surface temperature control method of the present invention;
Fig. 2 is the electrical block diagram of veneer surface temperature control system of the present invention.
Embodiment
Communication facilities inevitably is positioned over sometimes than rugged surroundings, as external environment condition or simple indoor environment etc.Technical scheme of the present invention is mainly used in these rugged environments, to prevent that communication single-board from being corroded by moisture content, concrete when using technical scheme of the present invention, division for rugged surroundings can be determined by people's cognitive general knowledge or relevant weather data analysis, provides a kind of feasible division methods here for your guidance:
For example: the relevance according to humiture t, salt fog s, three data of atmospheric pollution p decides the abominable degree of equipment operating environment, and running environment is divided into Three Estate, promptly be A, B, C, wherein, C class environment prevents corrosion for utilizing the present invention to control the veneer surface temperature, as table 1, the concrete numerical value in the table 1 is determined according to the various places situation.
Humiture is divided into four rank t1, t2, t3, t4 according to the sky percentage of mean daily temperature and relative humidity;
Define the salt fog grade according to distance ocean distance, and be divided into s1, s2, s3, s4;
Sulfuretted hydrogen, content of sulfur dioxide grade according to atmosphere are divided into p1, p2, p3 three major types.
Table 1: humiture/salt fog/atmospheric pollution and A/B/C environment mapping table
| t | t1 | t2 | t3 | t4 | ||||||||
| s | S1 | S2 | S3 | S1 | S2 | S3 | S1 | S2 | S3 | S1 | S2 | S3 |
| P1 | A | A | B | B | B | B | B | C | C | C | C | C |
| P2 | A | A | B | B | C | C | C | C | C | C | C | C |
| P3 | A | B | C | B | C | C | C | C | C | C | C | C |
Like this, just can simply mark off rugged surroundings, as whether using precondition of the present invention according to weather data.For example: can obtain from table 1, if the humiture in somewhere is t2, the salt fog grade is s2, and the atmospheric pollution grade is p2, and then this regional running environment is defined as C class rugged surroundings.
According to the relation between the temperature and humidity, it is general as long as assurance veneer surface temperature exceeds in the certain temperature range of ambient temperature, the surface moisture of veneer is kept in allowed limits, improve the adaptability that operates in veneer in each C class environment, the lower limit of temperature range is generally 8 ℃≤T
Min≤ 14 ℃, higher limit are generally 18 ℃≤T
Max≤ 24 ℃, can get T usually
Min=10 ℃, T
Max=20 ℃ comparatively suitable, and as 25 ℃ of the external world's day environment temperature average out to, then the veneer surface temperature must just can guarantee the veneer environmental suitability more than 35 ℃.But the temperature of veneer operation can not be too high, and too high surface temperature directly influences the reliability and the life-span of veneer, and therefore necessary difference with veneer surface temperature and environment temperature is limited to a higher limit T
MaxBelow, generally do not exceed 20 ℃, guaranteed that so promptly the veneer surface not because of low excessively temperature produces condensation, does not influence the temperature conditions that the normal operation of veneer is allowed again.For the equipment that runs on C class environment, use the temperature on the method for the invention control veneer surface, guarantee that veneer surface ratio ambient temperature exceeds value and (is also referred to as temperature rise, promptly be that veneer surface ratio ambient temperature is poor) maintain in the range of set temperature, promptly 10 ℃～20 ℃ scope just can improve the veneer environmental suitability, prevents that the veneer function lost efficacy because of metal erosion.
Concrete method flow is as shown in Figure 1:
S1, detection are also write down the surface temperature T of described veneer
1
This step can be read ambient temperature T very soon by on the veneer surface external temperature sensor being set
1, generally rule of thumb sensor is arranged on the minimum temperature that the veneer surface is measured in the minimum zone of the whole surface temperature of veneer (as near the air port edges of boards).
S2, detection and write down described veneer environment temperature T
2
This step is provided with another temperature sensor in veneer running environment, can know the temperature T of the running environment of veneer
2
In above-mentioned two steps, for more accurately control, the temperature sensor of measuring the temperature sensor of veneer surface temperature and measures ambient temperature can walk abreast respectively be set to a plurality of, utilize the mean value of a plurality of measured values to control the accuracy that has improved control, also improved simultaneously the reliability of total system, if when breaking down inefficacy, can directly not cause the malfunctioning of control system by one of them temperature sensor.
S3, determine that described surface temperature exceeds the temperature gap △ T=T of environment temperature
1-T
2
S4, comparison △ T and T
Min, i.e. 10 ℃ size;
According to present embodiment, if △ is T＜and 10 ℃, execution in step S5; Otherwise execution in step S6.
S5, produce condensation for preventing veneer surface, then need to reduce the heat radiation power of equipment, promptly reduce fan speed or stop the fan operation, perhaps reduce the rate of heat exchange of heat-exchange apparatus or close heat-exchange apparatus, the purpose of doing like this is to make veneer slowly to heat up.
S6, comparison △ T and T
Max, i.e. 20 ℃ size;
According to present embodiment, if △ is T〉20 ℃ times, execution in step S7; Otherwise execution in step S8.
S7, for guaranteeing the normal operation of veneer, then improve the rotating speed of described veneer radiator fan, perhaps improve the rate of heat exchange of heat-exchange apparatus, the purpose of doing like this is to make veneer to accelerate radiating rate to lower the temperature.
If 10 ℃≤△ of S8 is T≤20 ℃ the time, keep the rotating speed of described veneer radiator fan or the rate of heat exchange of heat-exchange apparatus, make veneer stable operation under normal temperature and humidity condition.
Behind the execution of step S8, return step S1 automatically and carry out cycle control, method of the present invention detected temperatures in real time changes and to adjust, also can according to the fixed cycle of setting at interval the periodicity detected temperatures and adjust.
In skinny device, the heat radiation power of veneer is generally provided by fan, number of fans and installation site are selected according to the equipment situation, and if main equipment, perhaps operate in the equipment in high temperature area, single fan heat radiation possibly can't be satisfied the demand, and therefore needs special heat-exchange apparatus that cooling is provided.
Under the extreme case, when even closeall heat radiation power can't guarantee that still the temperature of veneer exceeds 10 ℃ of operating ambient temperatures, can also heat at the lower regional area of veneer temperature makes the veneer intensification prevent condensation, the method of heating is to start the no function power device that sets in advance in veneer temperature lower region, for example triode, diode constant power device, and after temperature rises to certain value, close the power device of heating again, can also when single board starting, make temperature rise to required temperature range faster like this.
Control method of the present invention is finished by control system shown in Figure 2, and Fig. 2 is the cooling control system of the mini-plant of an employing fan heat radiation, and this cooling control system comprises:
Control chip is used to control the rotating speed of radiator fan;
First temperature sensor is arranged on the veneer surface, is used to detect the surface temperature of veneer and the communication interface by control chip sends to control chip;
Second temperature sensor is arranged near the described veneer and with this veneer and keeps certain spacing, is used to detect the environment temperature of veneer operation and the communication interface by control chip sends to control chip;
The built-in CPU of control chip sets in advance the control point T of veneer temperature
MinAnd T
Max, generally get 10 ℃ and 20 ℃, be higher than the temperature gap △ T of environment temperature according to the testing result gauging surface temperature of first temperature sensor and second temperature sensor, and with △ T and T
Min, T
MaxCompare, regulate the operating voltage of fan with the controlled wind speed rotating speed according to result relatively then.
Control system also comprises and is arranged on the power device of on the veneer, not bearing no any circuit function, and this power device connects the working power of this veneer by switch, and switch is turned on and off according to △ T by control chip, as △ T＜T
MinThe time connect switch heating veneer, be heated to certain hour after, when the surface temperature of veneer is equal to or higher than T
MinBack stopcock stops heating, and power device can be selected diode, triode constant power device, is installed in the lower zone of temperature, and quantity is determined according to the ambient conditions of veneer actual motion.
Control chip can adopt AD590, AD592, the models such as TMP17, LM135 of integrated temperature sensor, to the concrete setting of control chip and programming and to the switch control of diode or triode is technology well known to those skilled in the art, repeats no more here.
As previously mentioned, if the equipment that moves under main equipment or the hot environment, the wind-force that only has fan to provide can't satisfy the needs of heat radiation, then increases the heat-sinking capability that heat exchanger improves equipment is set, the control of control idea and rotation speed of the fan is identical, repeats no more here.
In addition, for the veneer in the equipment that runs on C class environment equally, can take to utilize the type of applying to apply the isolated protective layer that forms and prevent that veneer is corroded at the thicker coating material of veneer surface spraying one deck, the concrete selection of applying the type coating material is as shown in table 2:
Table 2: apply the type coating material
| Classification | Type | Model | Component | Chemical composition | Application | Marker method |
| UR | Polyurethane | DL-4A | Bi-component is solvent-free | 100% urethane resin | Common PCB assembled plate | The UR/ coating material |
| SR | Organosilicon | DC1-2577 | The single component small amount of toluene | 72% organosilicon elastoplasticity resin | Common PCB assembled plate, frequency PCB assembled plate | The SR/ coating material |
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1, the synchronisation control means of a kind of veneer surface temperature and relative humidity is characterized in that, comprises the steps:
Detect and write down the surface temperature of described veneer and the environment temperature of running space;
Determine the temperature gap between described surface temperature and the environment temperature;
Adjust the heat radiation power of described veneer according to described temperature gap, make this temperature gap remain on the lower limit T of setting
MinWith higher limit T
MaxBetween, be lower than the ambient humidity of described veneer running space with the relative humidity that guarantees described veneer surface.
2, the method for claim 1 is characterized in that, described surface temperature is meant the minimum temperature on described veneer surface.
3, the method for claim 1 is characterized in that,
Described surface temperature is meant the mean value that comprises a plurality of temperature of measuring in the zone in minimum temperature district on described veneer surface; And/or
The environment temperature of described veneer running space is the mean value of a plurality of temperature of measuring in described veneer running space.
4, method as claimed in claim 3 is characterized in that, it is one of following that the method for described adjustment heat radiation power is meant:
When described temperature gap is lower than T
MinThe time, reduce or close described heat radiation power;
When described temperature gap is higher than T
MaxThe time, improve described heat radiation power;
When described temperature gap is being greater than or equal to T
MinAnd be less than or equal to T
MaxBetween the time, keep described heat radiation power.
5, the method for claim 1 is characterized in that, described method comprises that also working as described temperature gap is lower than T
MinThe time, described veneer is heated to surface temperature is equal to or greater than T
MinStep.
6, as one of any described method of claim 1～5, it is characterized in that described heat radiation power is meant:
The wind-force that provides by radiator fan, and adjust this wind-force by the rotating speed of adjusting this fan; And/or
The cooling Power that provides by heat exchange equipment, and adjust this cooling Power by the rate of heat exchange of adjusting this heat exchange equipment.
7, method as claimed in claim 6 is characterized in that, described lower limit T
MinMore than or equal to 8 ℃ and smaller or equal to 14 ℃, higher limit T
MaxMore than or equal to 18 ℃ and smaller or equal to 24 ℃.
8, method as claimed in claim 7 is characterized in that, described lower limit T
MinEqual 10 ℃, higher limit T
MaxEqual 20 ℃.
9, the synchronous control system of a kind of veneer surface temperature and relative humidity comprises heat dissipation equipment that heat radiation power is provided and the control chip of controlling this heat dissipation equipment running status, it is characterized in that, also comprises:
Be arranged on first temperature sensor on described veneer surface, detect described veneer surface temperature, and this surface temperature is sent to described control chip;
Be arranged near the described veneer and keep second temperature sensor of spacing with this veneer, detect described veneer operation environment temperature, and this environment temperature is sent to described control chip;
Described control chip determines that described surface temperature exceeds the temperature gap of environment temperature, and adjusts the heat radiation power of described heat dissipation equipment according to described temperature gap.
10, system as claimed in claim 9, it is characterized in that, described first temperature sensor and/or second temperature sensor be parallel respectively be set to a plurality of, described control chip calculates the mean value of a plurality of described surface temperatures and environment temperature respectively, determines described temperature gap with two mean values that calculate.
11, as claim 9 or 10 described systems, it is characterized in that, described control system also comprises the power device that is arranged on the described veneer, connects the working power of this veneer by switch, and described switch is turned on and off according to described temperature gap by described control chip.
12, system as claimed in claim 11 is characterized in that, described power device is at least one diode and/or triode; Described heat dissipation equipment is radiator fan and/or heat-exchange apparatus.
As claim 9 or 10 described systems, it is characterized in that 13, described veneer comprises urethane resin layer or the organosilicon elastoplasticity resin bed that is coated in all surfaces zone or part surface zone.
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| CNB2005100722672A CN100507792C (en) | 2005-05-27 | 2005-05-27 | Synchronous control method and system for surface temp and relative humidity of one-board |
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| CNB2005100722672A CN100507792C (en) | 2005-05-27 | 2005-05-27 | Synchronous control method and system for surface temp and relative humidity of one-board |
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| CN101598949B (en) * | 2009-06-23 | 2012-07-18 | 中兴通讯股份有限公司 | Temperature acquisition control device and method |
| CN102168681B (en) * | 2010-02-26 | 2015-04-15 | 安徽智联投资集团有限公司 | Rotation speed control system and method of CPU (Central Processing Unit) fan |
| CN101868021A (en) * | 2010-06-18 | 2010-10-20 | 华为终端有限公司 | Heat protection method and wireless access network equipment |
| CN102368163A (en) * | 2011-08-24 | 2012-03-07 | 苏州生物医学工程技术研究所 | Temperature control system with environment temperature compensating function |
| CN103486067B (en) * | 2013-09-13 | 2016-01-27 | 华为技术有限公司 | Fan speed-regulating processing method and device |
| CN104566817B (en) * | 2014-12-26 | 2018-11-02 | 广东美的制冷设备有限公司 | The monitoring method and system of air conditioner temperature stress |
| CN104764113B (en) * | 2015-03-10 | 2017-10-13 | 广东美的制冷设备有限公司 | The control method for lowering temp of power device, device and air conditioner in air conditioner |
| CN104978000A (en) * | 2015-07-01 | 2015-10-14 | 上海与德通讯技术有限公司 | Heat dissipation method and heat dissipation system |
| CN105183055B (en) * | 2015-09-30 | 2017-07-25 | 厦门大学 | X-ray bulb working condition on-line detecting system |
| CN107765723A (en) * | 2016-08-23 | 2018-03-06 | 华为技术有限公司 | A kind of humidity control method, device and cavity equipment |
| CN108206128A (en) * | 2016-12-16 | 2018-06-26 | 北京金风科创风电设备有限公司 | Condensation preventing method and device for power semiconductor device |
| CN109348680B (en) * | 2018-10-16 | 2020-11-06 | 宁波奥克斯电气股份有限公司 | Moisture-proof control method and device for electric control board |
| CN109445483A (en) * | 2018-11-29 | 2019-03-08 | 宁波凯耀电器制造有限公司 | Temperature controlling and regulating system and control method |
| CN109671689B (en) * | 2018-12-24 | 2020-09-11 | 阳光电源股份有限公司 | Power semiconductor module protection method and protection system |
| CN111124004B (en) * | 2019-12-11 | 2021-11-23 | 苏州通富超威半导体有限公司 | Test board, test frame, temperature difference control system and method for high-acceleration stress test |
| CN112596561B (en) * | 2020-12-01 | 2021-10-15 | 冰山松洋生物科技(大连)有限公司 | CO (carbon monoxide)2Temperature control method of incubator |
| CN114910606A (en) * | 2021-02-09 | 2022-08-16 | 京东科技信息技术有限公司 | Gas detection method, gas detection device, electronic apparatus, and computer-readable storage medium |
| CN114822607B (en) * | 2022-04-01 | 2023-12-12 | 长鑫存储技术有限公司 | Heat dissipation device and computer system |
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