CN102594025A - Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity - Google Patents
Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity Download PDFInfo
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- CN102594025A CN102594025A CN2012100477929A CN201210047792A CN102594025A CN 102594025 A CN102594025 A CN 102594025A CN 2012100477929 A CN2012100477929 A CN 2012100477929A CN 201210047792 A CN201210047792 A CN 201210047792A CN 102594025 A CN102594025 A CN 102594025A
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- 239000002826 coolant Substances 0.000 title claims abstract description 122
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 238000001816 cooling Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 title abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 17
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- 230000008569 process Effects 0.000 claims description 8
- 230000037452 priming Effects 0.000 claims description 5
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- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 12
- 238000007654 immersion Methods 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
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Abstract
The invention discloses a system for controlling a liquid level of a cooling medium in an evaporative cooling sealing cavity. The control system comprises a piezoelectric element and a controller, wherein the piezoelectric element is fixedly arranged in the evaporative cooling sealing cavity; pole plates at the both sides of the piezoelectric element are vertically arranged at a set filling level, and the piezoelectric element generates a corresponding electric signal according to a fluid static pressure of the cooling medium which is stressed by the two pole plates at the opposite faces; and the controller obtains a result of judging that whether the top level of the cooling medium reaches the set filling face or not according to the intensity of the electric signal, and outputs a control signal for driving a corresponding execution element according to the judging result. Compared with the prior art, the control system provided by the invention has the advantages that the structure is simple and the error generated by man-made factors can be greatly reduced; and furthermore, the difficult problem of application of a soaked type evaporative cooling technology to flameproof electric equipment is solved without arranging an observing window on the equipment shell. On the basis, the invention further provides a method for controlling the liquid level of the cooling medium in the evaporative cooling sealing cavity.
Description
Technical field
The present invention relates to flame-proof type horizontal machine technical field, be specifically related to coolant level control method and system in the evaporative cooling seal chamber.
Background technology
The immersion type evaporation cooling technique is comparatively advanced at present a kind of novel cooling technology, is widely used on the relatively more outstanding electric equipment of power consumptions such as horizontal machine, large-scale power device, mainframe computer work station, heating.
Implement the immersion type evaporation cooling technique; Need be in a seal chamber with the device sealing that is cooled; And (evaporative cooling medium is for liquid under a kind of normal temperature to pour into the evaporative cooling medium of capacity; And the megohmite insulant that density is big, colourless, tasteless, in seal chamber, the liquid level of liquid evaporative cooling medium should not crossed the device that is cooled).The a large amount of heats that produce during the electric equipment operation; The evaporative cooling medium temperature is raise and the boiling vaporization; Coolant and the external condensation equipment of vaporization carries out after the heat exchange fluidized flow again to be got back in the seal chamber; Can the heat that device produces in time be dispersed into the outside of electric equipment through above-mentioned evaporative cooling process, thereby guarantee that electric equipment normally moves.
In order to guarantee the work safety of electric equipment, in above-mentioned evaporative cooling process, the pressure in the seal chamber should remain normal pressure, therefore, must reserve certain space in the seal chamber, the volumetric expansion during with the evaporation of buffering evaporative cooling medium; Moreover the price comparison of evaporative cooling medium is expensive at present.In view of the above, the evaporative cooling medium that is circulated in the seal chamber is not The more the better, but should be controlled on the rational liquid level.The main practice is on the outer wall of seal chamber, to offer a transparent observation window structure at present, utilizes this window structure to observe the liquid level situation of evaporative cooling medium when the annular seal space perfusion in vivo.This practice is that error is bigger owing to artificial factor on the one hand; On the other hand, for the flame-proof type electric equipment, must be complete owing to require the flame proof casing; Any opening can not be arranged; Therefore, can not adopt the observation window structure to observe the liquid level of evaporative cooling medium at seal chamber, thus the perfusion situation of uncontrollable evaporative cooling medium in seal chamber.
In view of this, need badly to prior art and improve, the filling liquid level of coolant in the seal chamber during with effective control flame-proof type electric equipment evaporative cooling.
Summary of the invention
To above-mentioned defective, the technical problem that the present invention solves is, coolant fluid level control system in a kind of evaporative cooling seal chamber is provided, the filling liquid level of coolant in the seal chamber when being used for controlling flame-proof type electric equipment evaporative cooling exactly.On this basis, the present invention also provides the control method of coolant fluid level control system in the above-mentioned evaporative cooling seal chamber simultaneously.
Coolant fluid level control system in the evaporative cooling seal chamber provided by the invention; Comprise piezoelectric element and controller; Said piezoelectric element is fixed in the evaporative cooling seal chamber; The both sides pole plate of said piezoelectric element vertically is arranged on to set irritates the liquid level place, and said piezoelectric element produces the corresponding signal of telecommunication according to the hydrostatic pressure size of two suffered coolants of pole plate on its opposite flank; Whether said controller arrives the judged result of setting the filling liquid level according to the end face of the size acquisition coolant of the said signal of telecommunication, and drives the control signal of corresponding executive component according to said judged result output.
Preferably, said executive component is indicator light or loud speaker, and said indicator light or loud speaker are opened or closed to said control signal.
Preferably; Said controller is an insulated gate bipolar transistor; Be serially connected in the power supply circuits of said indicator light or loud speaker; Two pole plates of said piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity, and said electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said power supply circuits.
Preferably, the control utmost point of the said insulated gate bipolar transistor positive pole, the source electrode that are connected to said electric capacity is connected to the positive pole that is connected to the DC power supply in the said power supply circuits behind negative pole, the drain electrode said indicator light of series connection or the loud speaker of the DC power supply in the said power supply circuits.
Preferably, said controller is a single-chip microcomputer.
Said controller, said executive component are the control valve that is arranged in the coolant priming line, and said control valve is opened or closed to said control signal.
Coolant level control method in the evaporative cooling seal chamber provided by the invention may further comprise the steps:
Preferably, in step 20, at first make the top side location of coolant surpass the bottom surface certain altitude of said piezoelectric element, and then reduce to concordant with the bottom surface of said piezoelectric element.
Preferably, in step 20, when the top side location of coolant surpasses the end face of said piezoelectric element, light indicator light or open the loud speaker alert and manually stop perfusion and manual drain coolant; In the process of discharging coolant, when the end face of coolant is concordant with the bottom surface of said piezoelectric element, closes indicator light or loud speaker and alert and manually stop to discharge coolant.
Preferably, in step 20, when the top side location of coolant surpasses the end face of said piezoelectric element, light indicator light or open loud speaker and stop perfusion, begin to discharge coolant simultaneously through control valve; In the process of discharging coolant, when the end face of coolant is concordant with the bottom surface of said piezoelectric element, closes indicator light or loud speaker and stop to discharge coolant through control valve.
Coolant fluid level control system in the evaporative cooling seal chamber provided by the invention; At evaporative cooling seal chamber internal fixation a piezoelectric element is set; And the both sides pole plate that makes piezoelectric element vertically is arranged on to set irritates the liquid level place; Piezoelectric element will produce the corresponding signal of telecommunication according to the hydrostatic pressure size of its two suffered coolants of pole plate; Whether the end face that obtains coolant through controller according to the size of the said signal of telecommunication then arrives is set the judged result of irritating liquid level, and drives the control signal of corresponding executive component according to said judged result output, thereby realizes the accurate control of coolant perfusion liquid level.Compared with prior art, technical scheme provided by the invention has significantly reduced the error that human factor produces, and simple in structure; In addition, technical scheme provided by the invention need not be provided with observation window on apparatus casing, has solved the difficult problem that the immersion type evaporation cooling technique is used on the flame-proof type electric equipment.
In the preferred version of above-mentioned control system; What controller adopted is insulated gate bipolar transistor; Be serially connected in the power supply circuits of indicator light or loud speaker; Two pole plates of piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity, and electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said power supply circuits.This design on basis cheaply, is swift in response.
In the another kind of preferred version of above-mentioned control system; Said executive component is the control valve that is arranged in the coolant priming line; Said control valve is opened or closed to said control signal; This scheme has improved control precision through the automatic control of filling process that has been arranged on control valve and chip microcontroller in the coolant priming line, has saved cost of labor simultaneously.
Coolant level control method in the evaporative cooling seal chamber provided by the invention; Through the big or small corresponding electric signal that is produced of the hydrostatic pressure of two suffered coolants of pole plate of piezoelectric element; Whether the end face that obtains coolant arrives is set the judged result of irritating liquid level; Significantly reduced the error that human factor produces, and need not observation window be set on apparatus casing, solved the difficult problem that the immersion type evaporation cooling technique is used on the flame-proof type electric equipment.
In a kind of preferred version of above-mentioned control method, at first make the top side location of coolant surpass the end face of said piezoelectric element, and then reduce to concordant with the bottom surface of said piezoelectric element.Like this, can avoid because the error that the coolant fluctuation is produced.
Description of drawings
Fig. 1 is the horizontal Induction Motor Structure sketch map of immersion type evaporative cooling flame-proof type;
Fig. 2 is a piezoelectric element output signals collecting sketch map in the interior coolant fluid level control system of the described evaporative cooling seal chamber of embodiment;
Fig. 3 is a control circuit sketch map in the interior coolant fluid level control system of the described evaporative cooling seal chamber of embodiment.
Piezoelectric element P, capacitor C 1, insulated gate bipolar transistor IGBT, control utmost point G, source S, drain D, indicator light L, DC power supply V.
Embodiment
Core of the present invention is to provide coolant level control method and system in a kind of evaporative cooling seal chamber; Its main purpose is for the equipment that adopts the immersion type evaporation cooling technique; In the process of annular seal space perfusion in vivo coolant; Reduce because artificial the observation confirms whether the perfusion liquid level arrives the error that desired location produces; And, therefore also solved the difficult problem that the immersion type evaporation cooling technique is used simultaneously on the flame-proof type electric equipment because technical scheme provided by the invention need not be provided with observation window on the housing of equipment.Specify this execution mode below in conjunction with Figure of description.
Be without loss of generality, this execution mode is elaborated as main body with the horizontal asynchronous motor of immersion type evaporative cooling flame-proof type.Should be appreciated that the cognitive ability according to those skilled in the art, technical scheme provided by the invention is equally applicable to other immersion type evaporative cooling electric equipment, for example: mainframe computer work station etc.This specific embodiment is not the restriction of formation to technical scheme.
See also Fig. 1; This figure is the structural representation of the horizontal asynchronous motor of immersion type evaporative cooling flame-proof type; Comprise the stator 11 and rotor 12 that are arranged in the casing 10, wherein stator 11 is sealed in the seal stator cavity 20, is perfused with coolant in this seal stator cavity 20; And coolant soaks stator 11 to realize the cooling (among Fig. 1,13 of marks refer to the setting of coolant and irritate liquid level position) to stator fully.This asynchronous motor has used coolant fluid level control system in the evaporative cooling seal chamber provided by the invention, to reduce coolant in filling process, owing to artificial the observation confirms whether the perfusion liquid level arrives the error that desired location produces.
The coolant fluid level control system comprises piezoelectric element and controller in the evaporative cooling seal chamber; This piezoelectric element is fixed in the evaporative cooling seal chamber; And the both sides pole plate of this piezoelectric element vertically is arranged on to set irritates the liquid level place; In the course of work, piezoelectric element produces the corresponding signal of telecommunication according to the hydrostatic pressure size of two suffered coolants of pole plate on its opposite flank; Whether controller arrives the judged result of setting the filling liquid level according to the end face of the size acquisition coolant of this signal of telecommunication, and drives the control signal of corresponding executive component according to this judged result output.
Coolant level control method in the evaporative cooling seal chamber provided by the invention may further comprise the steps:
Wherein, piezoelectric element refers on its two relative side, positive and negative pole plate is set respectively and the detecting element that constitutes by the dielectric substance that possesses piezoelectric effect (piezoelectric dielectric).Dielectric substance is charged at ordinary times and show electric neutrality; When its along the time spent of doing that certain orientation receives external force, inner can produce type polarization phenomena, produce a large amount of free electrons (elecrtonegativity) simultaneously; The atomic nucleus that loses electronics is an electropositive; Thereby form inner faint electric field, under the promotion of this inner faint electric field, the stressed surface of dielectric substance can accumulate out is enough to the amount of charge that detected by positive and negative pole plate.When external force disappeared, because nuclear attraction, free electron will be retracted in the nuclear structure again, and this moment, piezoelectric dielectric reverted to uncharged electric neutrality state again.Piezoelectric dielectric can be divided three classes: (1) quartz crystal class belongs to natural monocrystal; (2) piezoelectric ceramic belongs to artificial synthetic polycrystal; (3) high polymer piezoelectric material.Those skilled in the art can select dissimilar piezoelectric elements according to concrete application scenario.
Referring to Fig. 2 and Fig. 3, Fig. 2 and Fig. 3 show a specific embodiment of coolant fluid level control system in the evaporative cooling seal chamber, in this specific embodiment again; Executive component is indicator light (also can adopt loud speaker); Because the voltage signal that electric charge produced that accumulates on the piezoelectric element generally is very little, it is shinny to be not enough to drive indicator light, therefore; Controller has adopted insulated gate bipolar transistor IGBT, is serially connected in the power supply circuits of indicator light L (loud speaker).Insulated gate bipolar transistor IGBT is a kind of full-control type field-effect transistor, can be used as full-controlled switch and uses, and the voltage signal that electric charge produced that accumulates on the piezoelectric element can drive the control utmost point of IGBT fully.Concrete connected mode is: two pole plates (positive and negative electrode pole plate) of piezoelectric element P are connected respectively on the positive and negative electrode of a capacitor C 1; Positive pole, the source S that the control utmost point G of insulated gate bipolar transistor IGBT is connected to capacitor C 1 is connected to the positive pole that is connected to the DC power supply V in the power supply circuits behind the negative pole, drain D series connection indicator light L (loud speaker) of the DC power supply V in the power supply circuits; Capacitor C 1 piezoelectric element P is received the coolant static pressure and the electrical signal conversion that produces to be voltage signal form control signal corresponding; Drive insulated gate bipolar transistor IGBT and be switched on or switched off power supply circuits, to remind the associative operation personnel.If G has voltage signal on extremely, then IGBT conducting so power supply circuits are paths, have electric current to flow through and makes indicator light L shinny; If G extremely goes up the no-voltage signal, then IGBT ends, so power supply circuits break off, indicator light L extinguishes.
The implementation process of above-mentioned specific embodiment is following:
At first; Before the evaporative cooling medium of liquid state pours into the seal stator cavity; Configure the predetermined filling liquid level position of coolant; And fixing piezoelectric element P on other the solid support thing on the seal stator cavity inner wall above this irritates liquid level position or in the seal stator cavity, the both sides pole plate of piezoelectric element P vertically is arranged on to set irritates the liquid level place, and the pole plate on the piezoelectric element P two relative side is vertical with predetermined filling liquid level.
Then; Near fixing again capacitor C that matches 1 this piezoelectric element P; Two pole plates (positive and negative electrode pole plate) of piezoelectric element P are connected respectively on the positive and negative electrode of capacitor C 1, and when piezoelectric element P accumulated out electric charge because receiving the external force effect on its two pole plates, this charge Q amount was transmitted on the capacitor C 1 through lead; Be equivalent to charge to electric capacity; If the capacitance of charging capacitor is C, then this capacitor C 1 produces and output voltage U=Q/C, and voltage U is passed through the path of specific zero-decrement shielded conductor along inner other lead-out wires of horizontal machine again; Be drawn out to the outside of explosion-proof motor with other lead-out wires by the terminal box on the explosion-proof housing, as control signal.Certainly, the capacitor C 1 that is complementary with piezoelectric element P also can be arranged on seal stator cavity outside, all can as long as can satisfy the basic function of signal transmission.
Liquid evaporative cooling medium is slowly poured into by the valve of seal stator cavity bottom, along with constantly slowly getting into of coolant, irritates liquid level and slowly raises; In the meantime, piezoelectric element P is uncharged, and the charge Q amount equals 0; The output voltage U of the capacitor C 1 that is attached thereto equals 0, and therefore, insulated gate bipolar transistor IGBT ends; Power supply circuits break off, and indicator light L does not work.
Evaporative cooling medium liquid in getting into the seal stator cavity did not have whole stator, and when its filling liquid level just arrived at assigned address, this moment, piezoelectric element P still was exposed at outside the coolant; Just its lower end contacts with irritating liquid level, and its two opposite flanks also do not receive the effect of coolant hydrostatic pressure, along with coolant liquid continues to pour into; Irritate liquid level and begin to contact piezoelectric element P; This moment, the side of piezoelectric element P began to bear the hydrostatic pressure F of media fluid, so begin to occur piezoelectric effect, produced a certain amount of charge Q; This charge Q gives capacitor C 1 charging, thus output voltage signal.
The charge Q amount is very little during beginning, and voltage signal U is also very little, is not enough to drive IGBT; Along with the continuation of irritating liquid level raises, the charge Q amount increases gradually, and voltage signal U also increases gradually; After evaporative cooling medium liquid did not have piezoelectric element P fully, output voltage U enough drove insulated gate bipolar transistor IGBT, so power supply circuits become path by open circuit; Indicator light L is lighted, and operating personnel see that indicator light L is shinny then to stop to irritate liquid.
Subsequently, irritate the liquid personnel and begin to discharge coolant liquid through the valve of seal stator cavity lower bottom part, the coolant liquid level in the seal stator cavity begins to descend; When piezoelectric element P began to expose the coolant liquid level, its hydrostatic pressure F that receives began to reduce, and the charge Q on the piezoelectric element P electrode begins to reduce; Then output voltage U reduces; But as long as also have voltage signal, then insulated gate bipolar transistor IGBT remains conducting, and indicator light L still is a luminance.
A certain amount of from the discharge of seal stator cavity when coolant, when making its liquid level concordant with the bottom surface of piezoelectric element P (arriving the preset liquid level position of irritating), piezoelectric element P exposes coolant fully; No longer receive hydrostatic pressure F, i.e. F=0, therefore; Charge Q amount on two pole plates of piezoelectric element P also equals 0; Output voltage signal U is 0, and this moment, insulated gate bipolar transistor IGBT did not end because there being voltage drive signals, and power supply circuits break off; Indicator light L extinguishes; Irritate the liquid personnel and see that indicator light L extinguishes and then stop to discharge coolant, thereby the liquid level of the coolant in the seal stator cavity is rested on the preset filling liquid level position, to guarantee that stator is immersed in the coolant fully.
In such scheme, also can use single-chip microcomputer as controller, and realize the evaporative cooling medium automatic filling through the control valve that is arranged in the coolant priming line further.Concrete scheme is: single-chip microcomputer detects piezoelectric element output voltage size, and according to output voltage size output control signal corresponding, opens or close said control valve.
In addition; What such scheme all adopted is after coolant did not have piezoelectric element, to be discarded to the mode concordant with its bottom surface again; This is because one side is when coolant just contacts with the bottom surface of piezoelectric element, though can produce voltage signal U this moment; But U is very little, is not enough to drive insulated gate bipolar transistor IGBT; Though also can set the certain altitude that the coolant liquid level arrives piezoelectric element (for example 1/3rd of the piezoelectric element height or half the,, this scheme receives the influence of liquid fluctuating easily); In a word, after coolant did not have piezoelectric element, even continue perfusion; Voltage signal U also no longer changes, and can avoid the influence of coolant liquid fluctuating like this, and coolant do not have piezoelectric element after voltage signal U also no longer change; Be a stable signal, can reduce error.
In such scheme, insulated gate bipolar transistor IGBT also can adopt the brilliant lock (GTO) of gate electrode capable of switching off, power transistor (GTR), electric power FET full-control type power devices such as (EFT).
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. coolant fluid level control system in the evaporative cooling seal chamber is characterized in that, comprising:
Piezoelectric element; Be fixed in the evaporative cooling seal chamber; The both sides pole plate of said piezoelectric element vertically is arranged on to set irritates the liquid level place, and said piezoelectric element produces the corresponding signal of telecommunication according to the hydrostatic pressure size of two suffered coolants of pole plate on its opposite flank;
Controller, whether the end face that obtains coolant according to the size of the said signal of telecommunication arrives is set the judged result of irritating liquid level, and drives the control signal of corresponding executive component according to said judged result output.
2. coolant fluid level control system in the evaporative cooling seal chamber according to claim 1 is characterized in that said executive component is indicator light or loud speaker, and said indicator light or loud speaker are opened or closed to said control signal.
3. coolant fluid level control system in the evaporative cooling seal chamber according to claim 2; It is characterized in that; Said controller is an insulated gate bipolar transistor, is serially connected in the power supply circuits of said indicator light or loud speaker, and two pole plates of said piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity; Said electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said power supply circuits.
4. coolant fluid level control system in the evaporative cooling seal chamber according to claim 3; It is characterized in that positive pole, the source electrode that the control utmost point of said insulated gate bipolar transistor is connected to said electric capacity is connected to the positive pole that is connected to the DC power supply in the said power supply circuits behind negative pole, the drain electrode said indicator light of series connection or the loud speaker of the DC power supply in the said power supply circuits.
5. coolant fluid level control system in the evaporative cooling seal chamber according to claim 1 is characterized in that said controller is a single-chip microcomputer.
6. coolant fluid level control system in the evaporative cooling seal chamber according to claim 5 is characterized in that said executive component is the control valve that is arranged in the coolant priming line, and said control valve is opened or closed to said control signal.
7. coolant level control method in the evaporative cooling seal chamber is characterized in that, may further comprise the steps:
Step 10, piezoelectric element is set at evaporative cooling seal chamber internal fixation; Said piezoelectric element is according to the hydrostatic pressure size of two suffered coolants of pole plate on its opposite flank; Produce the corresponding signal of telecommunication, the both sides pole plate of wherein said piezoelectric element vertically is arranged on to set irritates the liquid level place;
Step 20, obtain the top side location of the coolant of current perfusion according to the size of the said signal of telecommunication, and the output control signal corresponding, the end face that drives corresponding executive component control coolant is with to set the filling liquid level concordant.
8. coolant level control method in the evaporative cooling seal chamber according to claim 7; It is characterized in that; In step 20, at first make the top side location of coolant surpass the bottom surface certain altitude of said piezoelectric element, and then reduce to concordant with the bottom surface of said piezoelectric element.
9. coolant level control method in the evaporative cooling seal chamber according to claim 8 is characterized in that, in step 20,
When the top side location of coolant surpasses the end face of said piezoelectric element, light indicator light or open the loud speaker alert and manually stop perfusion and manual drain coolant;
In the process of discharging coolant, when the end face of coolant is concordant with the bottom surface of said piezoelectric element, closes indicator light or loud speaker and alert and manually stop to discharge coolant.
10. coolant level control method in the evaporative cooling seal chamber according to claim 8 is characterized in that, in step 20,
When the top side location of coolant surpasses the end face of said piezoelectric element, light indicator light or open loud speaker and stop perfusion through control valve, begin to discharge coolant simultaneously;
In the process of discharging coolant, when the end face of coolant is concordant with the bottom surface of said piezoelectric element, closes indicator light or loud speaker and stop to discharge coolant through control valve.
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| CN201210047792.9A CN102594025B (en) | 2012-02-28 | 2012-02-28 | Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity |
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| CN201210047792.9A CN102594025B (en) | 2012-02-28 | 2012-02-28 | Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5795151A (en) * | 1980-11-29 | 1982-06-12 | Toshiba Corp | Coolant supplying unit in liquid-cooled, closed type motor |
| US6300693B1 (en) * | 1999-03-05 | 2001-10-09 | Emerson Electric Co. | Electric motor cooling jacket assembly and method of manufacture |
| CN1801583A (en) * | 2004-12-31 | 2006-07-12 | 中国科学院电工研究所 | Evaporating and cooling system monitoring and protection controlling device for generator stator |
| CN201315026Y (en) * | 2008-12-15 | 2009-09-23 | 传力电子衡器(南京)有限公司 | Liquid level controller |
| CN202472442U (en) * | 2012-02-28 | 2012-10-03 | 肖富凯 | Cooling-medium liquid level control system in evaporation-cooling sealing cavity body |
-
2012
- 2012-02-28 CN CN201210047792.9A patent/CN102594025B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5795151A (en) * | 1980-11-29 | 1982-06-12 | Toshiba Corp | Coolant supplying unit in liquid-cooled, closed type motor |
| US6300693B1 (en) * | 1999-03-05 | 2001-10-09 | Emerson Electric Co. | Electric motor cooling jacket assembly and method of manufacture |
| CN1801583A (en) * | 2004-12-31 | 2006-07-12 | 中国科学院电工研究所 | Evaporating and cooling system monitoring and protection controlling device for generator stator |
| CN201315026Y (en) * | 2008-12-15 | 2009-09-23 | 传力电子衡器(南京)有限公司 | Liquid level controller |
| CN202472442U (en) * | 2012-02-28 | 2012-10-03 | 肖富凯 | Cooling-medium liquid level control system in evaporation-cooling sealing cavity body |
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| CN102594025B (en) | 2015-01-14 |
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Effective date of registration: 20231113 Address after: 061108 Zhongjie Industrial Park, Cangzhou City, Hebei Province, from East to Central Europe Road and North to Aviation Avenue Patentee after: MCC Jingcheng Lingang Heavy Equipment Co.,Ltd. Address before: 411200 No.8 Jiangnan Avenue, Jiuhua Industrial Park, Xiangtan City, Hunan Province Patentee before: MCC (XIANGTAN) HEAVY INDUSTRIAL EQUIPMENT Co.,Ltd. |