CN102254744A - Built-in protector of three-phase compressor - Google Patents
Built-in protector of three-phase compressor Download PDFInfo
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- CN102254744A CN102254744A CN2011101429843A CN201110142984A CN102254744A CN 102254744 A CN102254744 A CN 102254744A CN 2011101429843 A CN2011101429843 A CN 2011101429843A CN 201110142984 A CN201110142984 A CN 201110142984A CN 102254744 A CN102254744 A CN 102254744A
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- housing
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- protector
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- resistance wire
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Abstract
The invention discloses a built-in protector of a three-phase compressor. The built-in protector comprises a housing which is an enclosed structure formed by a base plate and a cover. The housing is provided with three wiring feet and a bimetallic strip. The built-in protector is characterized in that: the housing is filled with or not an inert gas; one end of two wiring feet is welded with static contact-pieces; the other end of the two wiring feet is extended out of the housing and is respectively connected with two conducting rods; The one end of another wiring foot is fixedly connected with a resistance wire, and the other end is extended out of the housing and connected with another conducting rod; two moving contacts of the bimetallic strip are respectively contacted with fixed contacts of the two wiring feet; the resistance wire is connected in series with the two wiring feet. Compared to the prior art, the built-in protector has a better arc extinguishing performance and a better fusing protection function. The structure is compact and the volume is small. The built-in protector is convenient for installing. And using the invention can improve product quality, raise usage safety, and substantially prolong a service life of the compressor.
Description
Technical field
The present invention relates to the electric components technical field, especially a kind of built-in protector that is applicable to three-phase compressor.
Background technology
Compressor is the core position of a lot of equipment, its cost is higher, but in use, owing to motor current excessive or coil temperature is too high and three-phase circuit in one contact bad or reason such as phase shortage misphase, the capital brings problem for the normal operation of compressor, gently then may cause whole system work undesired, heavy then may burn compressor.This just needs one even several protective device are installed, and protects the safe operation of compressor.
At present, the thermal protector of compressor coil is a lot, and when still inserting thermal protector in the compressor circuit, because the reasons in structure of himself, assembling is complicated, is difficult for use, and the protector that also has is being difficult to automatically reply after the protection automatically.In addition, for three-phase compressor, when circuit generation misphase or phase shortage, can produce very big electric current in the circuit, at this moment, claimed device can in time start, and guarantees the safety of circuit.Under some special statuss, may produce great electric current within a short period of time in the circuit, and bimetal leaf may have little time action or work under abnormality for a long time, and the protector contact can occur bonding, can't play the effect of cutting off circuit.
The protector of prior art is when identification misphase or phase shortage problem; often will be through complicated judgement; what have can only protect mutually to a certain in the three-phase; yet; the a plurality of protectors of needs installation are finished phase shortage or the fault-phase protection to three-phase circuit; existing protector does not possess circuit fuse function under the unusual condition; this also brings certain potential safety hazard for compressor; especially compressor protector at open circuit in a flash; under the effect of voltage and electric current; the arcing phenomenon can take place in the breakpoint two ends; the bad problem of thermal conductivity and arc extinguishing can appear; cause circuit not disconnect and thoroughly have an accident, because the compressor volume inside is very limited, this just requires the compact conformation that has of protector in addition; the characteristics that volume is little.
Summary of the invention
The objective of the invention is the built-in protector of a kind of three-phase compressor that designs at the deficiencies in the prior art; it adopts bimetal leaf and fusible link to be arranged in the closed shell that is full of inert gas; thermal conductivity and the arc extinguishing and the susceptibility of protector have been improved; have good arc-extinguishing property and fuse protection function; compact conformation, volume are little, easy for installation; further improve the quality of products with safe in utilization, prolong the useful life of compressor greatly.
The object of the present invention is achieved like this: the built-in protector of a kind of three-phase compressor, comprise the housing that constitutes closed structure by base plate and cap, be provided with A leg, B leg, C leg and bimetal leaf in the housing, be characterized in that A leg, B leg and C leg are fixedly installed on the base plate by insulated column, the interior or filling with inert gas of housing; A leg and B leg one end welding static contact, the other end stretches out housing and connects with the B conducting rod with the A conducting rod respectively; Bimetal leaf is the arc plate of two ends welding moving contact, is fixedly installed in the housing by the weldering nail; Static contact is " L " shape, and its two ends are welded fixed contact and resistance wire contact respectively; The fixedly connected resistance wire of C leg one end, the other end stretch out housing and are connected with the C conducting rod; Resistance wire is a serpentine, and its " S " is curved to be connected in series two moving contacts and two fixed contact elasticity crimping with resistance wire contact on two static contacts respectively.
Described resistance wire is provided with triangle fusing mouth at " S " curved middle part.
The present invention compared with prior art has good arc-extinguishing property and fuse protection function, and compact conformation, volume are little, easy for installation, further improves the quality of products and safe in utilization, prolongs the useful life of compressor greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the resistance wire structural representation;
Fig. 4 is that the B of Fig. 1 is to view.
Embodiment
Consult accompanying drawing 1, the present invention is made of the housing 21 of closed structure base plate 1 and cap 2, be provided with A leg 3, B leg 4, C leg 5 and bimetal leaf 6 in the housing 21, A leg 3, B leg 4 and C leg 5 are fixedly installed on the base plate 1 by the insulated column 14 of glass sintering, are filled with inert gas in the housing 21; A leg 3 and B leg 4 one ends welding static contact 9, the other end stretch out housing 2 and are connected 22 connections with the B conducting rod with A conducting rod 12 respectively; Bimetal leaf 6 is the arc plate of two ends welding step moving contact 7, and is fixedly installed in the housing 2 by weldering nail 10; Static contact 9 is " L " shape, and its two ends are welded fixed contact 8 and resistance wire contact 13 respectively; The fixedly connected resistance wire 11 of C leg 5 one ends, the other end stretch out housing 2 and are connected with C conducting rod 23; Resistance wire 11 is a serpentine, and its " S " is curved to be connected in series two moving contacts 7 and the 8 elasticity crimping of two fixed contacts with resistance wire contact 13 on two static contacts 9 respectively.
The present invention uses like this: the present invention is built in compressor inside; and in the housing 21 of closed structure, charge into nitrogen or helium; can stop freon and oil to enter so effectively and prevent component ageing in the housing 21 and improve arc extinction performance; A conducting rod 12; the B conducting rod connects 22 and is connected with the three-phase circuit output of three-phase compressor respectively with C conducting rod 23; when the compressor operate as normal: fixed contact 8 contacts with moving contact 7; when the compressor non-normal working: along with the temperature rising of electric current increase or compressor coil; bimetal leaf 6 raise by temperature or three-phase circuit in electric current can not balance the time; produce very big electric current and compressor and produce heat thereupon; resistance wire 11 also can produce more heat; bimetal leaf 6 is heated and expands rapidly; make moving contact 7 and the fixed contact on the static contact 98 on the bimetal leaf 6 disconnect; cut off the electricity supply, play the protection compressor.It is the element of mechanical energy with thermal power transfer that bimetal leaf 6 is one; it is composited by the sheet metal of two kinds of different coefficients of expansion; because the coefficient of expansion difference of two kinds of sheet metals; but the elongation of two kinds of sheet metal faying faces is identical; force bimetal leaf 6 towards the less lateral bending song of the coefficient of expansion; when temperature descends; bimetal leaf 6 just recovers original curved shape; moving contact 7 and fixed contact 8 auto-closings; make circuit recover normal operating conditions, thus circuit is lacked any one and can play effective protection mutually.Ifs circuit generation misphase, three-phase current equally can not balances, and electric current increases, and the bimetal leaf 6 after being heated also can be finished the protection action, are repaired up to the circuit of misphase, and compressor just can work on.Under some special statuss; may produce great electric current within a short period of time in the circuit; bimetal leaf 6 may have little time action or work under abnormality for a long time; moving contact 7 is bonding with fixed contact 8 appearance, and in this state, resistance wire 11 will fuse immediately; play the effect of cutting off circuit, compressor is effectively protected.Resistance wire 11 adopts the structure that has fusing mouth 31; can select the resistance wire 11 of different resistances according to different circuit protection demands; resistance wire 11 be connected in the circuit produce heat also can conduct to bimetal leaf 6 and with bimetal leaf 6 self-resistances heating acting in conjunction, realize the break-make of bimetal leaf 6 and the defencive function of resistance wire 11 fusing.Select the metal material of the different coefficients of expansion to realize the differently curved degree of bimetal leaf 6 as required; the moving contact 7 of bimetal leaf 6 two ends welding adopts terraced structure; can after moving contact under the smaller volume 7 and fixed contact 8 disconnect, can form bigger open gap, make protection more safe and reliable.Especially under some special statuss; may produce great electric current within a short period of time in the circuit; bimetal leaf 6 may have little time action or work under abnormality for a long time; moving contact 7 occurs bonding with fixed contact 8; in this state; the fusing mouth 31 of resistance wire 11 will fuse immediately, can play the effect of cutting off circuit, can satisfy the protection requirement and the safety of different size compressor so widely.
More than just the present invention is further illustrated, is not in order to the restriction this patent, all for the present invention's equivalence enforcement, all should be contained within the claim scope of this patent.
Claims (2)
1. built-in protector of three-phase compressor, comprise the housing that constitutes closed structure by base plate and cap, be provided with A leg, B leg, C leg and bimetal leaf in the housing, it is characterized in that A leg, B leg and C leg are fixedly installed on the base plate by insulated column, the interior or filling with inert gas of housing; A leg and B leg one end welding static contact, the other end stretches out housing and connects with the B conducting rod with the A conducting rod respectively; Bimetal leaf is the arc plate of two ends welding moving contact, is fixedly installed in the housing by the weldering nail; Static contact is " L " shape, and its two ends are welded fixed contact and resistance wire contact respectively; The fixedly connected resistance wire of C leg one end, the other end stretch out housing and are connected with the C conducting rod; Resistance wire is a serpentine, and its " S " is curved to be connected in series two moving contacts and two fixed contact elasticity crimping with resistance wire contact on two static contacts respectively.
2. according to the built-in protector of the described three-phase compressor of claim 1, it is characterized in that described resistance wire is provided with triangle fusing mouth at " S " curved middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101429843A CN102254744A (en) | 2011-05-31 | 2011-05-31 | Built-in protector of three-phase compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101429843A CN102254744A (en) | 2011-05-31 | 2011-05-31 | Built-in protector of three-phase compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102254744A true CN102254744A (en) | 2011-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101429843A Pending CN102254744A (en) | 2011-05-31 | 2011-05-31 | Built-in protector of three-phase compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102254744A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448825A (en) * | 2017-10-20 | 2018-08-24 | 台州市双龙泵业有限公司 | High-efficiency energy-conserving small-sized three-phase water-pump motor |
| CN108981075A (en) * | 2018-09-21 | 2018-12-11 | 宁波奥克斯电气股份有限公司 | A kind of protective device and air conditioner |
| CN112185758A (en) * | 2019-07-01 | 2021-01-05 | 青岛海尔电冰箱有限公司 | Protector and compressor working circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433975B1 (en) * | 1998-11-07 | 2002-08-13 | Texas Instruments Incorporated | Motor protector apparatus |
| CN1661748A (en) * | 2004-02-24 | 2005-08-31 | 株式会社生方制作所 | Protector of electric compressor |
| CN2935460Y (en) * | 2006-07-24 | 2007-08-15 | 包启章 | Air-conditioning compressor heat protector |
| CN201307760Y (en) * | 2008-11-28 | 2009-09-09 | 匡法荣 | Thermal protector for three-phase motor |
| WO2010052750A1 (en) * | 2008-11-05 | 2010-05-14 | 株式会社生方製作所 | Protective device of three-phase motor |
-
2011
- 2011-05-31 CN CN2011101429843A patent/CN102254744A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433975B1 (en) * | 1998-11-07 | 2002-08-13 | Texas Instruments Incorporated | Motor protector apparatus |
| CN1661748A (en) * | 2004-02-24 | 2005-08-31 | 株式会社生方制作所 | Protector of electric compressor |
| CN2935460Y (en) * | 2006-07-24 | 2007-08-15 | 包启章 | Air-conditioning compressor heat protector |
| WO2010052750A1 (en) * | 2008-11-05 | 2010-05-14 | 株式会社生方製作所 | Protective device of three-phase motor |
| CN201307760Y (en) * | 2008-11-28 | 2009-09-09 | 匡法荣 | Thermal protector for three-phase motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448825A (en) * | 2017-10-20 | 2018-08-24 | 台州市双龙泵业有限公司 | High-efficiency energy-conserving small-sized three-phase water-pump motor |
| CN108981075A (en) * | 2018-09-21 | 2018-12-11 | 宁波奥克斯电气股份有限公司 | A kind of protective device and air conditioner |
| CN108981075B (en) * | 2018-09-21 | 2023-07-18 | 宁波奥克斯电气股份有限公司 | Protection device and air conditioner |
| CN112185758A (en) * | 2019-07-01 | 2021-01-05 | 青岛海尔电冰箱有限公司 | Protector and compressor working circuit |
| CN112185758B (en) * | 2019-07-01 | 2024-01-05 | 青岛海尔电冰箱有限公司 | Protector and compressor operating circuit |
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Application publication date: 20111123 |