CN101145472A - Built-in type overload protection device for refrigeration compressor - Google Patents
Built-in type overload protection device for refrigeration compressor Download PDFInfo
- Publication number
- CN101145472A CN101145472A CNA2007101320168A CN200710132016A CN101145472A CN 101145472 A CN101145472 A CN 101145472A CN A2007101320168 A CNA2007101320168 A CN A2007101320168A CN 200710132016 A CN200710132016 A CN 200710132016A CN 101145472 A CN101145472 A CN 101145472A
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- overload protection
- bimetal leaf
- refrigeration compressor
- protection device
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Abstract
The invention provides a built-in overload protector used for a refrigeration compressor, which is characterized in that the built-in overload protector comprises a metal pedestal, a frame, a bimetallic strip, a contact bearing, an insulating ring, a conductor and a sealing cap shell. The metal pedestal and the sealing cap shell are arranged correspondingly to form a closed space. The frame is fixed on the metal pedestal at one end. The bimetallic strip is arranged at the other end of the frame. The conductor is arranged in a hole of the metal pedestal, passing through the metal pedestal. An insulating layer is equipped between the conductor and the metal pedestal. The insulating ring is sheath around the conductor. The contact bearing, contacting with the bimetallic strip, is fixed on the insulating ring and connected with the conductor. The invention has the advantages that the built-in overload protector has simple structure, and can be equipped inside the shell of the refrigeration compressor to directly and rapidly detect the changes of temperature and current inside the compressor, so as to switch off the current when the temperature and current inside the compressor are abnormal, providing the overload protection; the overload protector is more stable, reliable and safe to use.
Description
Technical field
The present invention relates to a kind of overload protection of motor, particularly built-in type overload protection device for refrigeration compressor.
Background technology
Two windings are generally arranged in the existing single-phase refrigeration compressor motor; generally all be installed on the external shell of refrigerant compressor at existing overload protective device under the situation of having only a winding job; when compressor because the overload or stall; coil temperature and compressor internal temperature rise; thereby cause the rising of outside temperature; turn-off current immediately after this overload protective device is sensed temperature and risen is realized overload protection.But temperature conducts to the housing certain hour that lags again internally, because external protector single face is attached on the compressor housing, is unfavorable for the temperature sense of protector again.Particularly, along with the enhancing of environmental consciousness, adopt freon to change hydrocarbon into to former refrigerant, this medium is a flammable and explosive substance, and claimed utensil has sealing, and the protector of reason does not possess this requirement.Because former protector contact is exposed in the air,, very easily cause the skew of parameter again along with the increasing of tripping number of times, the oxidation of contact, wearing and tearing.
Summary of the invention
1, goal of the invention: in order to solve the deficiency of existing overload of compressor protector; the invention provides a kind of built-in type overload protection device for refrigeration compressor; this protector will be arranged on compressor; thereby can sense the variation of compression built-in temperature and electric current more direct, fast; just break contact fast when compression built-in temperature and current anomaly; thereby the cut-out electric current is realized overload protection.
2, technical scheme: a kind of built-in type overload protection device for refrigeration compressor of the present invention is characterized in that: it comprises metab, support, bimetal leaf, contact supporting, dead ring, electric conductor and sealing cap shell; The corresponding installation with the sealing cap shell of metab constitutes confined space, support one end is fixed on the metab, bimetal leaf is installed in the support other end, thereby electric conductor is installed on the aperture of metab and runs through base, be provided with insulating barrier between electric conductor and the metab, dead ring is enclosed within on the electric conductor, is fixed on the dead ring and with electric conductor with the contacted contact supporting of bimetal leaf to link to each other.
In order effectively to support the bimetal leaf in the protector, bimetal leaf is rack-mount by the bimetal leaf supporting, and the screw of support bimetal leaf is arranged in the protector by the aperture on the support.
For electric conductor and metab are effectively insulated, insulating barrier forms by the vitreum sintering.
In order effectively protector to be installed on the motor in the compressor, a pair of inserted sheet is connected on metab and the electric conductor.
In order to make bimetal leaf and contact support more effective the contact, make whole parts constitute an effective loop, be fixed with first contact on bimetal leaf, the second wafer is fixed in the contact supporting, and bimetal leaf contacts with the second wafer by first contact with the contact supporting.First contact and the second wafer are the metal contact.
For effective conduction current, the electric conductor on the protector is preferably conductive cores.
For fear of electric arc leak, be difficult for causing the burning and the blast, be filled with inert gas in the seal cavity.
Realization principle of the present invention: as Fig. 3, because this protector is to be connected in the compressor electric motor main circuit, first contact contacts with the second wafer; be closure state; when on the low side or system broke down when supply voltage, the compressor electric motor electric current rose, and makes its heating by bimetal leaf.Again since this protector in compressor inside; this protector housing induced compression machine internal temperature; thereby make the heating of the bimetal leaf self in this protector; when bimetal leaf reaches critical upset temperature; the bimetal leaf upset, promptly first contact and the second wafer disconnect, thereby make circuit disconnect; this moment, the compressor electric motor no current passed through, and the protection compressor electric motor is unlikely overheated.When temperature progressively descends, bimetal leaf automatically resets, electric motor starting.
3, beneficial effect: a kind of built-in type overload protection device for refrigeration compressor of the present invention is simple in structure; not only be arranged on compressor; thereby can sense the variation of compression built-in temperature and electric current more direct, fast; and can the fast shut-off electric current when compression built-in temperature and current anomaly; realize overload protection; simultaneously, stable more, reliable and safety.
Description of drawings
Fig. 1 is a side structure schematic diagram of the present invention.
Fig. 2 is a Facad structure schematic diagram of the present invention.
Fig. 3 is circuit theory diagrams of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As Fig. 1 and Fig. 2, built-in type overload protection device for refrigeration compressor of the present invention comprises metab 1, support 2, bimetal leaf 3, first contact 4, contact supporting 5, the second wafer 6, dead ring 7, electric conductor 8, sealing cap shell 9, bimetal leaf supporting 10, screw 11 and inserted sheet 12.For effective conduction current, electric conductor 8 is cylindrical conductive cores in the present embodiment, metab 1 constitutes confined space with sealing cap shell 9 corresponding seal weldings, support 2 one ends are welded on the metab 1, the bimetal leaf 3 that is welded with first contact 4 is welded on the support 2 by bimetal leaf supporting 10, support 2 is provided with aperture, screw 11 can be regulated according to actual conditions by this aperture and support bimetal leaf 3, conductive cores is installed on the aperture of metab 1, be provided with insulating barrier between conductive cores and the metab 1, for conductive cores and metab 1 are effectively insulated, insulating barrier forms by the vitreum sintering.Dead ring 7 is enclosed within on the conductive cores, and contact supporting 5 is welded on the dead ring 7 and with conductive cores and links to each other, and the second wafer 6 is welded on the contact supporting plate 5 and with first contact 4 and contacts.In order effectively protector to be installed on the motor in the compressor, a pair of inserted sheet 12 is welded on respectively on metab 1 and the conductive cores, and conductive cores links to each other with the compressor winding by inserted sheet.For fear of electric arc leak, be difficult for causing the burning and the blast, be filled with inert gas in the whole seal cavity.When on the low side or system broke down when supply voltage, the compressor electric motor electric current rose, and electric current makes its heating by bimetal leaf 3.Again because this protector is installed in compressor inside; protector housing induced compression machine internal temperature; thereby make the heating of the bimetal leaf 3 self in this protector; when bimetal leaf 3 reaches critical upset temperature; the bimetal leaf upset, promptly first contact 4 disconnects with the second wafer 6, thereby makes circuit disconnect; this moment, the compressor electric motor no current passed through, and the protection compressor electric motor is unlikely overheated.When temperature progressively descends, bimetal leaf 3 cooling back upsets promptly automatically reset, and first contact 4 contacts with the second wafer 6, i.e. closing of circuit, electric motor starting.
Claims (8)
1. built-in type overload protection device for refrigeration compressor is characterized in that: it comprises metab (1), support (2), bimetal leaf (3), contact supporting (5), dead ring (7), electric conductor (8) and sealing cap shell (9); Metab (1) constitutes confined space with sealing cap shell (9), support (2) one ends are fixed on the metab (1), bimetal leaf (3) is installed in support (2) other end, electric conductor (8) is installed on the aperture of metab (1), be provided with insulating barrier between electric conductor (8) and the metab (1), dead ring (7) is enclosed within on the electric conductor (8), is fixed on dead ring (7) with the contacted contact supporting of bimetal leaf (3) (5) and upward and with electric conductor (8) links to each other.
2. built-in type overload protection device for refrigeration compressor according to claim 1 is characterized in that: bimetal leaf (3) is installed on the support (2) by bimetal leaf supporting (10).
3. built-in type overload protection device for refrigeration compressor according to claim 1 is characterized in that: the insulating barrier between electric conductor (8) and the metab (1) forms by the vitreum sintering.
4. built-in type overload protection device for refrigeration compressor according to claim 1 is characterized in that: the screw (11) that supports bimetal leaf (3) is arranged on the support (2) by the aperture on the support (2).
5. built-in type overload protection device for refrigeration compressor according to claim 1 is characterized in that: a pair of inserted sheet (12) is connected on metab (1) and the electric conductor (8).
6. built-in type overload protection device for refrigeration compressor according to claim 1; it is characterized in that: be fixed with first contact (4) on the bimetal leaf (3); the second wafer (6) is fixed in the contact supporting (5), and bimetal leaf (3) contacts with the second wafer (6) by first contact (4) with contact supporting (5).
7. according to claim 1,3 or 5 described built-in type overload protection device for refrigeration compressor, it is characterized in that: electric conductor (8) is conductive cores.
8. according to claim 1,2,3,4,5 or 6 described built-in type overload protection device for refrigeration compressor, it is characterized in that: be filled with inert gas in the above-mentioned seal cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101320168A CN101145472A (en) | 2007-09-07 | 2007-09-07 | Built-in type overload protection device for refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101320168A CN101145472A (en) | 2007-09-07 | 2007-09-07 | Built-in type overload protection device for refrigeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101145472A true CN101145472A (en) | 2008-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101320168A Pending CN101145472A (en) | 2007-09-07 | 2007-09-07 | Built-in type overload protection device for refrigeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101145472A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426982A (en) * | 2011-09-21 | 2012-04-25 | 上海航天科工电器研究院有限公司 | Built-in protector for compressor |
| CN102761194A (en) * | 2012-07-19 | 2012-10-31 | 刘立文 | Sealing device for dust explosion-proof motor |
-
2007
- 2007-09-07 CN CNA2007101320168A patent/CN101145472A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426982A (en) * | 2011-09-21 | 2012-04-25 | 上海航天科工电器研究院有限公司 | Built-in protector for compressor |
| CN102761194A (en) * | 2012-07-19 | 2012-10-31 | 刘立文 | Sealing device for dust explosion-proof motor |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |