CN106057574B - A kind of equipment temperature limiter and equipment temperature limiting method based on liquid metal - Google Patents
A kind of equipment temperature limiter and equipment temperature limiting method based on liquid metal Download PDFInfo
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- CN106057574B CN106057574B CN201610394105.9A CN201610394105A CN106057574B CN 106057574 B CN106057574 B CN 106057574B CN 201610394105 A CN201610394105 A CN 201610394105A CN 106057574 B CN106057574 B CN 106057574B
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- temperature limiter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Control Of Temperature (AREA)
Abstract
The invention discloses a kind of the equipment temperature limiter and temperature limiting method based on liquid metal for belonging to device temperature protection technique field.The equipment temperature limiter based on liquid metal is a kind of automatic reciprocating type equipment temperature limiter；It is tightly connected and is formed by closure and main cavity；In main cavity, air chamber is connected with fluid chamber by micro-channel；On main cavity surface, one layer of conducting metal plated layer of plating, fills the liquid conduction working medium that can move freely in the conducting metal plated layer section of micro-channel in the middle part of micro-channel.Temperature limiter is connected with equipment, insulation liquid refrigerant in fluid chamber is according to device temperature is gasifiable or condensation, change position of the liquid conduction working medium in micro-channel, conductive working medium is caused to depart from the coat of metal with being connected, control temperature limiter to be in open circuit or reset state with circuitry, realize control device start and stop.Equipment can be worked with automatic reciprocating type, and whole process is simple and reliable；Work in the presence of a harsh environment, there is the advantages such as economic security, have broad application prospects.
Description
Technical field
The invention belongs to device temperature protection technique field, more particularly to a kind of automatic reciprocating type equipment temperature limiter and limit
Warm method, equipment temperature limiter and temperature limiting method specifically based on liquid metal.
Background technology
Electric power promotes the development of human society, and various power equipments is touched in Working Life.In reality
During running use, power equipment is easy to that various failures occur, injury or disaster are brought to the mankind.Although electric power is set
Standby often there is fuse melting, tripping operation etc. and protect, but seriously when may burn out electrical equipment, make one to get an electric shock, cause fire, cause wealth
Production loss and life security threat etc..Therefore, the safe and stable operation for how improving power equipment solves as power worker
Important content.Currently used protector, such as electric brake, fusible conductive filament need electric power personnel periodic maintenance, replacing etc.,
Workload and unsafe factor are added, particularly in adverse circumstances.Equipment temperature limiter based on liquid metal can be according to setting
Standby job requirement temperature processing and fabricating, the position installed in part of appliance to the restricted requirement of temperature, passes through automatic checkout equipment
Running temperature is controlled to equipment start-stop, ensures equipment safety stable operation.At present, in micro-channel equipment processing and fabricating etc.
Aspect technology maturation, initial cost and maintenance cost etc. are relatively low.Therefore, equipment temperature limiter technology of the development and application based on liquid metal
It is significant to China's power industry equipment safety operation.The invention goes out a kind of equipment limit temperature based on liquid metal
The key technology of device, power industry various kinds of equipment is can be applied to, is had broad application prospects.
The air chamber that the main cavity of equipment temperature limiter core 2 based on liquid metal is connected by micro-channel in Fig. 1
Formed with iknsulating liquid cavity, the filling liquid conduction working medium 5 at the middle part of micro-channel 7, the length of micro-channel is much larger than liquid
The length of body conduction working medium, filling air cavity 3 is in both sides and reaches the gasifiable iknsulating liquid cavity 6 of certain temperature；Micro-
Plate one layer of conducting metal plated layer 4, when liquid conducting metal contacts with the coat of metal, closing of circuit in thin channel middle position.Limit
The closure 1 of warm device is mainly used in sealing, and prevents gas and liquid leakage in cavity.
The content of the invention
The purpose of the present invention is to propose to a kind of equipment temperature limiter and temperature limiting method based on liquid metal, it is characterised in that
The equipment temperature limiter based on liquid metal is tightly connected by closure and main cavity and formed；In main cavity, air chamber and liquid
Body cavity is connected by micro-channel；On main cavity surface, one layer of conducting metal plating is plated in the middle part of micro-channel and direction normal thereto
Layer, coat of metal width and conducting liquid working medium equal length；One section is filled in the conducting metal plated layer section of micro-channel can be certainly
By mobile conductive worker quality liquid, as temperature limiter and the series circuit conducting medium of device controller；Conductive working medium liquid simultaneously
The purpose for separating air chamber and fluid chamber is played in the effect that body also depends on its own face tension force；Filled in air cavity after being heated
The less air of volumetric expansion, filled in fluid chamber and reach the gasifiable insulation liquid refrigerant of certain temperature.
The air cavity volume ratio liquid chamber volume is big 2-3 times.
The gasifiable liquid refrigerant is deionized water, FC72 etc., and the conductive worker quality liquid is liquid mercury, the conjunction of indium gallium
Gold etc., the gasification temperature of its gasifiable liquid refrigerant are far below the gasification temperature of conductive worker quality liquid.
The closure and main cavity of the temperature limiter using thermal conductivity factor it is big, it is non-conductive and not with liquid metal and filling
The material that liquid reacts makes.
The making material of the temperature limiter closure and main cavity is ceramics or glass.
It is described to fill one section of conductive worker quality liquid that can move freely in the conducting metal plated layer section of micro-channel, it is fine logical
The equivalent diameter in roadWherein σ is gas-liquid interface tension force, ρGAnd ρLIt is that liquid conduction working medium is steam respectively
With density during liquid, g is acceleration of gravity.
A kind of equipment temperature limiting method of the equipment temperature limiter based on liquid metal, it is characterised in that be fixed on temperature limiter
Heating position in equipment, temperature limiter are connected by conducting metal plated layer with device controller；When equipment normal work is allowing
During temperature range, electric current is in closure state by temperature limiter conducting metal plated layer and liquid conduction working medium, circuit；When temperature surpasses
When crossing equipment setting value, the insulation liquid refrigerant of filling reaches boiling point and gas-liquid phase transition occurs in fluid chamber, causes volume drastically
Expansion, promote the liquid conduction working medium in micro-channel to be moved toward air cavity direction, cause liquid conduction working medium and the coat of metal
Depart from, temperature limiter is in off state with circuitry, and equipment is stopped, and reaches the requirement of protection equipment；Device temperature drops
After low, condensation occurs for the working medium in fluid chamber and volume contraction, liquid conducting metal reset to initialization position, circuit reset
For connection status, equipment restarting.
The length of the micro-channel is much larger than the length of conductive worker quality liquid, in the operating condition, conductive worker quality liquid
Close to the side of fluid chamber in micro-channel, ensure the conductive liquid working medium working in reciprocating mode in fluid chamber all the time；Due to air
Cavity volume is bigger than fluid chamber volume 2-3 times, then ensures that liquid is led in promoting micro-channel when iknsulating liquid working medium starts gasification
Electric worker quality liquid moves to air side, and iknsulating liquid working medium stops gasification after departing from conducting metal plated layer, improves limit temperature
The sensitivity of device and reliability.
A kind of the advantages of equipment temperature limiter based on liquid metal proposed by the invention, is to fill in temperature limiter fluid chamber
The liquid of note can change with device temperature and occur to gasify or condense, and promote the reciprocating fortune of liquid conducting metal in micro-channel
It is dynamic, make temperature limiter automatically in open circuit or reset state, control device start and stop work.The boiling point of insulation liquid refrigerant is according to equipment
The maximum temperature that works limitation selection.Temperature limiter whole work process is simple and reliable, due to the work characteristics of temperature limiter, is adapted to disliking
Worked under bad environment, while the technology such as modern processing can reach requirement of the temperature limiter in processing, sealing etc., have economic peace
The characteristics of complete.The innovative temperature limiter, while automatic reciprocating type work is realized, there is work under economic security and adverse circumstances
Make etc. advantage, can be wide be applied to in the power equipment of the restricted requirement of temperature.
Brief description of the drawings
Fig. 1 is the equipment temperature limiter schematic diagram based on liquid metal.
Fig. 2 is Fig. 1 section A-A profiles.
Fig. 3 is temperature limiter core component operation principle schematic diagram
Description of reference numerals：1- closures, 2- main cavities, 3- air chamber, 4- conducting metal plated layers, 5- conductive liquid works
Matter, 6- iknsulating liquid working fluid chambers, 7- micro-channels, conducting liquid working medium position during 51- open circuits, conducting liquid work when 52- resets
Matter position
Embodiment
The present invention proposes a kind of equipment temperature limiter and temperature limiting method based on liquid metal, below in conjunction with the accompanying drawings and specific real
Mode is applied to be described in further details the present invention.
Equipment temperature limiter schematic diagram based on liquid metal as shown in Figure 1, Fig. 2 are Figure 1A-A cross-sectional views, and Fig. 3 is limited
Warm device operation principle schematic diagram.
In the equipment temperature limiter based on liquid metal shown in Fig. 1, Fig. 2 by closure 1 and the sealed connection group of main cavity 2
Into；In main cavity 2, air chamber 3 is connected with iknsulating liquid working fluid chamber 6 by micro-channel 7；Air chamber volume ratio fluid chamber volume
It is big 2-3 times；On main cavity surface, one layer of conducting metal plated layer 4 vertical with micro-channel of plating in the middle part of micro-channel, width is with leading
The equal length of electric worker quality liquid.One section of conductive worker quality liquid 5 that can move freely is filled at the middle part of micro-channel 7, is limit temperature
The series circuit conducting medium of device and device controller, during normal work with coat of metal good contact；Conductive working medium liquid simultaneously
Body 5 also depend on its own face tension force effect play cut-off air chamber 3 and fluid chamber 6 purpose, in air cavity 3 filling by
The less air of volumetric expansion after heat, filled in liquid chamber 6 and reach the gasifiable iknsulating liquid working medium of certain temperature.Limit temperature
The closure 1 of device is mainly used in heat conduction and sealing, prevents gas and liquid leakage in main cavity 2.
The closure 1 and main cavity 2 of the temperature limiter using thermal conductivity factor it is big, it is non-conductive and not with liquid metal and filling
The material (ceramics or glass) that liquid reacts makes.
The limit temperature principle of equipment temperature limiter based on liquid metal：Heating position temperature limiter being fixed in equipment, limit
Warm device is connected by conducting metal plated layer 4 with device controller；When equipment normal work is allowing within temperature range, electric current
By conducting metal plated layer 4 and conductive worker quality liquid 5, the circuit of temperature limiter and equipment is in closure state；Set when temperature exceedes
During standby setting value, the temperature of fluid chamber interior insulation liquid refrigerant 6 rises rapidly to boiling point in temperature limiter, and gas-liquid phase transition, liquid occurs
Cavity pressure is faster than what air cavity pressure increased, therefore conductive worker quality liquid 5 moves to the side of air chamber 3, causes conductive work
Matter liquid 5 departs from conducting metal plated layer 4, i.e., 51 positions in shown in Fig. 3；Temperature limiter is in breaking shape with circuitry
State, equipment are stopped, and reach the requirement of protection equipment；After temperature reduces, the steam condensation of insulation steam state is changed into liquid, pressure drop
Low, conductive worker quality liquid 5 returns to initial position 52, and circuit reset is connection status, and equipment restarts.
The length of micro-channel 7 is much larger than the conductive length of worker quality liquid 5, in the operating condition, work conductive as shown in Figure 3
Matter liquid 5, close to the side of fluid chamber, ensures the liquid metal working in reciprocating mode in fluid chamber all the time in micro-channel.Filling is empty
The cavity volume of gas is bigger than liquid chamber volume 2-3 times, it is ensured that iknsulating liquid promotes liquid metals when starting gasification to sky
Gas side is moved, and stops gasification after departing from the coat of metal, improves sensitivity and the reliability of temperature limiter.
Claims (1)
1. a kind of equipment temperature limiter based on liquid metal, the equipment temperature limiter of the liquid metal is a kind of automatic reciprocating type equipment
Temperature limiter；It is tightly connected and is formed by closure and main cavity；In the medium position plating one vertical with micro-channel of main cavity surface
Layer conducting metal plated layer, fills the one section of liquid that can move freely conduction working medium in the conducting metal plated layer section of micro-channel, makees
For temperature limiter and the series circuit conducting medium of device controller；Liquid conduction working medium also depends on the work of its own face tension force simultaneously
With the purpose for playing cut-off air chamber and fluid chamber；The less air of heated rear volumetric expansion is filled in air cavity, in liquid
Filling reaches the iknsulating liquid working medium that gas-liquid phase transition can occur for certain temperature in body cavity；Characterized in that, in main cavity, air
Chamber is connected with fluid chamber by micro-channel；Air cavity volume ratio liquid chamber volume is big 2-3 times；The conduction in micro-channel
One section of conductive worker quality liquid that can move freely, the equivalent diameter of micro-channel are filled in metal-plated interval
Wherein σ is gas-liquid interface tension force, ρGAnd ρLIt is density when conductive liquid working medium is steam and liquid respectively, g accelerates for gravity
Degree；The length of the micro-channel is much larger than the length of conductive worker quality liquid, and in the operating condition, liquid conduction working medium is fine
Close to the side of fluid chamber in passage, ensure the liquid metal working in reciprocating mode in microchannel all the time；Due to air chamber volume ratio liquid
Body cavity volume is big 2-3 times, and the air in air chamber has good compressibility, then ensures the insulation working medium vaporization in fluid chamber
Promote the liquid conduction worker quality liquid in micro-channel to be moved to air side during expansion, and stop after departing from conducting metal plated layer
Only gasify, improve sensitivity and the reliability of temperature limiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394105.9A CN106057574B (en) | 2016-06-06 | 2016-06-06 | A kind of equipment temperature limiter and equipment temperature limiting method based on liquid metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394105.9A CN106057574B (en) | 2016-06-06 | 2016-06-06 | A kind of equipment temperature limiter and equipment temperature limiting method based on liquid metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106057574A CN106057574A (en) | 2016-10-26 |
| CN106057574B true CN106057574B (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610394105.9A Expired - Fee Related CN106057574B (en) | 2016-06-06 | 2016-06-06 | A kind of equipment temperature limiter and equipment temperature limiting method based on liquid metal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607628A (en) * | 2003-10-14 | 2005-04-20 | 横河电机株式会社 | Relay |
| CN101471201A (en) * | 2007-12-28 | 2009-07-01 | 宗翠红 | Heat-sensitive electric switch |
| CN203521312U (en) * | 2013-10-30 | 2014-04-02 | 温州耐特尔自动化设备有限公司 | Adjustable temperature control switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009026568A (en) * | 2007-07-19 | 2009-02-05 | Yokogawa Electric Corp | Switch device |
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2016
- 2016-06-06 CN CN201610394105.9A patent/CN106057574B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607628A (en) * | 2003-10-14 | 2005-04-20 | 横河电机株式会社 | Relay |
| CN101471201A (en) * | 2007-12-28 | 2009-07-01 | 宗翠红 | Heat-sensitive electric switch |
| CN203521312U (en) * | 2013-10-30 | 2014-04-02 | 温州耐特尔自动化设备有限公司 | Adjustable temperature control switch |
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| Publication number | Publication date |
|---|---|
| CN106057574A (en) | 2016-10-26 |
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