CN106783386B - A kind of temperature controller temperature sensing tube is brazed interface structure with capillary - Google Patents
A kind of temperature controller temperature sensing tube is brazed interface structure with capillary Download PDFInfo
- Publication number
- CN106783386B CN106783386B CN201611174731.3A CN201611174731A CN106783386B CN 106783386 B CN106783386 B CN 106783386B CN 201611174731 A CN201611174731 A CN 201611174731A CN 106783386 B CN106783386 B CN 106783386B
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- China
- Prior art keywords
- stainless steel
- protective case
- temperature sensing
- sensing tube
- capillary
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
Abstract
A kind of temperature controller temperature sensing tube is brazed interface structure with capillary, it include the stainless steel temperature sensing tube with one end closing in portion, small, flexible stainless steel capillary and thin-wall stainless steel non-close cylindrical shape protective case, the protective case upper top is equipped at least three uniformly distributed inner valves, the protective case is equipped with a seam penetrated through vertically, opening there are one being set in the middle part of the protective case, the protective case lower part is sleeved in the closing in portion of stainless steel temperature sensing tube, small, flexible stainless steel capillary one end passes through the protective case top, middle part and the closing in portion of stainless steel temperature sensing tube enter stainless steel temperature-sensitive tube inner chamber, the 1st solder joint and the 2nd solder joint are obtained by electric resistance welding on the joint portion in the protective case Yu closing in portion.This soldering interface structure can greatly reduce the stress suffered by interface, and to improve the service life of temperature controller, since interface is only concentrated at one, and path of welding is short, take very short, therefore can directly be welded in air.
Description
Technical field
The present invention relates to soldering interface structure technical field, more particularly to a kind of temperature sensing tube of temperature controller is brazed with capillary
Interface structure.
Background technology
The metal temperature sensing tube that one end of the temperature module is closed up in compression-type temperature controller needs flexible with a small, flexible
Metal capillary carry out soldering connection, and brazing requirements are air-tightness.Since capillary is small, flexible, in temperature controller
The interface of capillary and temperature sensing tube can be repeatedly bent during producing and installing and using, and generate internal stress；In addition soldering
Solder is different from the material of temperature sensing tube, capillary, and interface is easy by electrochemical corrosion in the long-term use；Internal stress
Can make interface corrosion cracking with the combination of electrochemical corrosion, cause the temperature module internal working medium leak and to temperature controller lose
Effect.
United States Patent (USP) US 4333669 discloses the technical solution of entitled " Brazed or Soldered Joints ",
The technical solution is set there are one protective case, is open from protective case and is injected the soldering paste that solder powder is mixed with scaling powder and carrier,
It is re-fed into tunnel heating to be brazed, the solder in soldering paste will melt and penetrate between protective case and temperature sensing tube, temperature-sensitive
Cylinder and intercapillary gap, to be formed in conjunction with interface and fixed protective case.The technical solution has the following disadvantages：1）By
In needing to penetrate into the gap between protective case and temperature sensing tube with solder, it is therefore desirable to consume more solder（Your gold solder contains
Belong to silver）, production cost can be greatly promoted.2）Due to needing solder infiltration many places and distant place, path is more, route is long, so needing
Very long weld interval, low production efficiency；Since weld interval is long, welded piece is easy to happen oxygen if exposure in air
Change, so need to weld in expensive protective atmosphere continuous tunnel furnace or vacuum furnace, while also need to entire temperature sensing tube and
Whole capillary heating, energy consumption are more.3）For prevent solder climb because of capillarity to protective case and it is intercapillary between
It is bonded at gap and the two, protective case wants larger with intercapillary gap, and the sharp edge of protective case upper port in order to prevent
Capillary may be hurt, it is also necessary to portion's setting funnel-form port on the protective sleeve, therefore it is brazed radially wobbling for postcapillary
Amplitude is very big, and what protective case can not effectively limit capillary radially wobbles amplitude, it is difficult to avoid capillary from being brazed with temperature sensing tube and connect
Because generating larger stress cracking phenomena occurs for mouth, thus is unfavorable for being brazed the protection of interface.
Invention content
The purpose of the present invention is to provide a kind of temperature controller temperature sensing tubes and capillary to be brazed interface structure, the soldering interface knot
Structure can be such that soldering interface only concentrates at one, and sealing wire is short out, and required weld interval is short, can directly be added in air environment
Thermal weld, simultaneously as protective case top is equipped with 3~8 inner valves, therefore postwelding capillary radially wobbles amplitude with respect to protective case
Very little, the stress to being brazed interface can greatly reduce, and effectively reduce the stress that is brazed interface and may occur, corrode and open
Splitting leads to refrigerant leakage and then temperature controller is made to fail.
Technical solution proposed by the invention is such：
A kind of temperature controller temperature sensing tube is brazed interface structure with capillary, includes a stainless steel sense with one end closing in portion
Warm cylinder, small, flexible stainless steel capillary and thin-wall stainless steel non-close cylindrical shape protective case, the thin-wall stainless steel non-close
Cylindrical shape protective case upper top is equipped at least three uniformly distributed inner valves, and thin-wall stainless steel non-close cylindrical shape protective case is equipped with one
The seam penetrated through vertically, thin-wall stainless steel non-close cylindrical shape protective case middle part are set there are one opening, and the thin-wall stainless steel is non-
Closed circular tubular protective case lower part is sleeved in the closing in portion of stainless steel temperature sensing tube, and small, flexible stainless steel capillary one end passes through
The closing in portion on thin-wall stainless steel non-close cylindrical shape protective case top, middle part and stainless steel temperature sensing tube enters in stainless steel temperature sensing tube
Chamber leads on the joint portion in the thin-wall stainless steel non-close cylindrical shape protective case Yu the closing in portion of the stainless steel temperature sensing tube
Cross the 1st solder joint and the 2nd solder joint of electric resistance welding acquisition and wherein axisymmetrical.
Further, the thin-wall stainless steel non-close cylindrical shape protective case upper top is evenly equipped with 3~8 inner valves；It is described thin
The thickness of wall stainless steel non-close cylindrical shape protective case is 0.1~0.4mm.
Further, the outer diameter of the internal diameter in the closing in portion of the stainless steel temperature sensing tube and the small, flexible stainless steel capillary
Difference be 0.1~0.3mm.Further, between the stainless steel temperature sensing tube closing in portion and the small, flexible stainless steel capillary
Gap fill brazing solder.
Further, the closing in portion of the thin-wall stainless steel non-close cylindrical shape protective case and the stainless steel temperature sensing tube is bullet
Property engagement connection.
The present invention innovation main points be：Only due to the soldering interface of stainless steel temperature sensing tube and small, flexible stainless steel capillary
Have at one, and sealing wire is short out, the required time is very short, can locally apply scaling powder and brazing solder, using acetylene torch
Or the methods of high-frequency induction heating directly carries out heating welding in air environment.Due to temperature sensing tube-capillary combination after soldering
Resistance is less than interior resistance of the thin-wall stainless steel non-close cylindrical shape protective case along its semicircle circumferential direction in the transverse direction of part, so can adopt
Butt-joint is carried out with resistance welder, and electric current will mainly pass through thin-wall stainless steel non-close cylindrical shape protective case, stainless steel sense when butt-joint
Warm barrel and the conduction of the minimal path of temperature sensing tube-capillary combination section, in the thin-wall stainless steel non-close cylindrical shape that resistance is larger
The temperature sensing tube outer surface contact position of protective case and temperature sensing tube-capillary sub-assembly forms nugget, therefore secures thin-wall stainless steel
Non-close cylindrical shape protective case, and the interior resistance of internal solder layer is relatively low, and solder layer will not be caused to be melted again.
It is postwelding simultaneously as being laid with 3~8 inner valves on thin-wall stainless steel non-close cylindrical shape protective case top
The radial amplitude of oscillation of capillary substantially reduces.
Compared with prior art, remarkable result of the invention is：
The temperature controller temperature sensing tube of the present invention is brazed in interface structure with capillary as a result of thin-wall stainless steel non-close
Cylindrical shape protective case, upper part inner wall even distribution are equipped with 3~8 inner valves, and make small, flexible stainless steel capillary radially wobbles width
Degree greatly reduces, and to substantially reduce the stress generated in soldering interface, that is, greatly reduces the machine of soldering joint broken
Meeting.Since thin-wall stainless steel non-close cylindrical shape protective case has wrapped up the exposed parts of brazing solder, to shield soldering and connect
The AgCuZn alloy solder of mouth may be also considerably reduced the feelings that soldering interface cracks by zinc anode electrochemical corrosion
Condition occurs, to greatly increase the service life of temperature controller.
This temperature controller temperature sensing tube can make with capillary soldering interface structure at soldering interface concentration one, and path of welding is short,
Weld interval is short, so its Welding process can directly carry out in air environment completely, without high-temperature oxydation occurs,
With simple operation, energy saving, reliable in quality, the remarkable result that production cost is low, production efficiency is high.
Description of the drawings
Fig. 1 is that a kind of temperature sensing tube of temperature controller of the present invention is brazed interface structure schematic diagram with capillary；
Fig. 2 is the schematic front view of the cylindrical shape protective case of thin-wall stainless steel non-close shown in Fig. 1；
Fig. 3 is the schematic top plan view of Fig. 2；
Fig. 4 is to carry out resistance between the temperature sensing tube of temperature controller shown in Fig. 1 and thin-wall stainless steel non-close cylindrical shape protective case
The schematic diagram of butt-joint.
Specific implementation mode
The present invention is further elaborated by following example.
Shown in Fig. 1 to Fig. 4, a kind of temperature controller temperature sensing tube is brazed interface structure with capillary, including one has one
Hold stainless steel temperature sensing tube 1, small, flexible stainless steel capillary 2 and thin-wall stainless steel non-close the cylindrical shape protection of closing in portion 1-1
Set 3,3 upper top of thin-wall stainless steel non-close cylindrical shape protective case are equipped at least three uniformly distributed inner valve 3-1, and thin-walled is stainless
Steel non-close cylindrical shape protective case 3 is equipped with a seam 3-3 penetrated through vertically, thin-wall stainless steel non-close cylindrical shape protective case 3
Middle part is set there are one the 3-2 that is open, and 3 lower part of thin-wall stainless steel non-close cylindrical shape protective case is sleeved on stainless steel temperature sensing tube 1
On closing in portion 1-1,2 one end of small, flexible stainless steel capillary pass through 3 top of thin-wall stainless steel non-close cylindrical shape protective case,
The closing in portion 1-1 of middle part and stainless steel temperature sensing tube 1 enters 1 inner cavity of stainless steel temperature sensing tube, justifies in the thin-wall stainless steel non-close
It is obtained and its central axes pair by electric resistance welding on the joint portion of the tubular protective case 3 and closing in portion 1-1 of the stainless steel temperature sensing tube 1
The 1st solder joint 5-1 and the 2nd solder joint 5-2 claimed.
As further preferred embodiment, 3 upper top of thin-wall stainless steel non-close cylindrical shape protective case is uniformly distributed
There are 3~8 inner valve 3-1, the thickness of the thin-wall stainless steel non-close cylindrical shape protective case is 0.1~0.4mm.
As further preferred embodiment, the internal diameter of the closing in portion 1-1 of the stainless steel temperature sensing tube 1 with it is described tiny
The difference of the outer diameter of soft stainless steel capillary 2 is 0.1~0.3mm.
As further preferred embodiment, 1 closing in portion 1-1 of the stainless steel temperature sensing tube and the small, flexible are stainless
Gap between steel wool tubule 2 fills brazing solder.
As further preferred embodiment, the thin-wall stainless steel non-close cylindrical shape protective case 3 with it is described stainless
It is connected for resilient engagement between the closing in portion 1-1 of steel temperature sensing tube 1.
The joint portion of small, flexible stainless steel capillary 2 and the closing in portion 1-1 of stainless steel temperature sensing tube 1 can be in air environments
It is middle to carry out quick Welding.The closing in portion 1-1 of thin-wall stainless steel non-close cylindrical shape protective case 3 and stainless steel temperature sensing tube 1
Engagement to be fixedly connected completed by resistance welder, the conjugative component is placed across to the lower electrode 6 of resistance welder
Between top electrode 7, start-up resistor welding machine welds to form the 1st solder joint 5-1 and the 2nd solder joint 5-2 by electric current, and not by thin-walled
Steel non-close cylindrical shape of becoming rusty protective case 3 is fixed with stainless steel temperature sensing tube 1.
The thin-wall stainless steel non-close cylindrical shape protective case 3 of the present invention can be used stainless strip or plate stamping Volume it is bent and
At there are seam 3-3 at when cylindrical shape for Volume songs, but since there are two solder joint 5-1 and 5-2 for tool, even if using relatively thin stainless steel
Also it is not easy to open because being bent force effect by small, flexible stainless steel capillary 2.The thin-wall stainless steel non-close cylindrical shape
Protective case 3 is additionally provided with three or three or more inner valve 3-1, to further limit 2 edge of small, flexible stainless steel capillary
The amplitude of fluctuation of radial direction reduces the stress suffered by soldering interface.The thin-wall stainless steel non-close cylindrical shape protective case 3
One opening 3-2, since temperature controller temperature detection is detected in 300 DEG C or more of salt bath, inspection can be also set in the middle
Residual medium flows away from opening 3-2 after having surveyed, so medium will not remain in thin-wall stainless steel non-close cylindrical shape protective case 3
It is interior.
Since the soldering interface structure of the present invention can make thin-wall stainless steel non-close cylindrical shape protective case 3 wrap up solder layer
4 exposed parts shield the zinc anode electrochemical corrosion that the AgCuZn alloy solder of interface may be subject to, and thin-wall stainless steel
What non-close cylindrical shape protective case 3 can also greatly reduce small, flexible stainless steel capillary 2 radially wobbles amplitude, greatly reduces
Stress suffered by interface, therefore the possibility that interface causes cracking because generating stress and electrochemical corrosion is significantly reduced,
Effectively reduce temperature controller leads to refrigerant leakage in turn because stress and electrochemical corrosion occur for soldering interface after a period of use
Temperature controller is caused to fail.
Claims (5)
1. a kind of temperature controller temperature sensing tube is brazed interface structure with capillary, it is characterised in that：There is one end closing in portion including one
（1-1）Stainless steel temperature sensing tube（1）, small, flexible stainless steel capillary（2）With thin-wall stainless steel non-close cylindrical shape protective case
（3）, the thin-wall stainless steel non-close cylindrical shape protective case（3）Upper top is equipped at least three uniformly distributed inner valves（3-1）, thin-walled
Stainless steel non-close cylindrical shape protective case（3）The seam penetrated through vertically equipped with one（3-3）, thin-wall stainless steel non-close cylindrical shape
Protective case（3）Middle part is open there are one setting（3-2）, the thin-wall stainless steel non-close cylindrical shape protective case（3）Lower part is sleeved on not
Become rusty steel temperature sensing tube（1）Closing in portion（1-1）On, small, flexible stainless steel capillary（2）One end passes through the non-envelope of thin-wall stainless steel
Close cylindrical shape protective case（3）Top, middle part and stainless steel temperature sensing tube（1）Closing in portion（1-1）Into stainless steel temperature sensing tube（1）It is interior
Chamber, in the thin-wall stainless steel non-close cylindrical shape protective case（3）With the stainless steel temperature sensing tube（1）Closing in portion（1-1）'s
The 1st solder joint with wherein axisymmetrical is obtained by electric resistance welding on joint portion（5-1）With the 2nd solder joint（5-2）.
2. temperature controller temperature sensing tube according to claim 1 is brazed interface structure with capillary, it is characterised in that：The thin-walled
Stainless steel non-close cylindrical shape protective case（3）Upper top is evenly equipped with 3~8 inner valves（3-1）；The thin-wall stainless steel non-close cylinder
Shape protective case（3）Thickness be 0.1~0.4mm.
3. temperature controller temperature sensing tube according to claim 1 is brazed interface structure with capillary, it is characterised in that：It is described stainless
Steel temperature sensing tube（1）Closing in portion（1-1）Internal diameter and the small, flexible stainless steel capillary（2）Outer diameter difference be 0.1~
0.3mm。
4. temperature controller temperature sensing tube according to claim 3 is brazed interface structure with capillary, it is characterised in that：It is described stainless
Steel temperature sensing tube（1）Closing in portion（1-1）With the small, flexible stainless steel capillary（2）Between gap fill brazing solder.
5. temperature controller temperature sensing tube according to claim 1 is brazed interface structure with capillary, it is characterised in that：The thin-walled
Stainless steel non-close cylindrical shape protective case（3）With the stainless steel temperature sensing tube（1）Closing in portion（1-1）Between for resilient engagement connect
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611174731.3A CN106783386B (en) | 2016-12-19 | 2016-12-19 | A kind of temperature controller temperature sensing tube is brazed interface structure with capillary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611174731.3A CN106783386B (en) | 2016-12-19 | 2016-12-19 | A kind of temperature controller temperature sensing tube is brazed interface structure with capillary |
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| Publication Number | Publication Date |
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| CN106783386A CN106783386A (en) | 2017-05-31 |
| CN106783386B true CN106783386B (en) | 2018-10-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837688A (en) * | 1972-01-17 | 1974-09-24 | Robertshaw Controls Co | Joint construction and method of making the same or the like |
| US4333669A (en) * | 1979-04-28 | 1982-06-08 | E.G.O. Elektro-Gerate Blanc Und Fischer | Brazed or soldered joints |
| CN201608105U (en) * | 2010-01-21 | 2010-10-13 | 九江恒泰自动控制器有限公司 | Adsorption type thermostat |
| CN105118733A (en) * | 2015-09-01 | 2015-12-02 | 常州汇商电器有限公司 | Temperature controller pedestal and manufacturing technique |
| CN206236610U (en) * | 2016-12-19 | 2017-06-09 | 佛山通宝华盛电热控制器有限公司 | A kind of temperature controller temperature sensing tube and capillary soldering interface structure |
-
2016
- 2016-12-19 CN CN201611174731.3A patent/CN106783386B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837688A (en) * | 1972-01-17 | 1974-09-24 | Robertshaw Controls Co | Joint construction and method of making the same or the like |
| US4333669A (en) * | 1979-04-28 | 1982-06-08 | E.G.O. Elektro-Gerate Blanc Und Fischer | Brazed or soldered joints |
| CN201608105U (en) * | 2010-01-21 | 2010-10-13 | 九江恒泰自动控制器有限公司 | Adsorption type thermostat |
| CN105118733A (en) * | 2015-09-01 | 2015-12-02 | 常州汇商电器有限公司 | Temperature controller pedestal and manufacturing technique |
| CN206236610U (en) * | 2016-12-19 | 2017-06-09 | 佛山通宝华盛电热控制器有限公司 | A kind of temperature controller temperature sensing tube and capillary soldering interface structure |
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| Publication number | Publication date |
|---|---|
| CN106783386A (en) | 2017-05-31 |
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