CN2785117Y

CN2785117Y - Full-closed type thermosensitive protecting relay

Info

Publication number: CN2785117Y
Application number: CN 200520055832
Authority: CN
Inventors: 冯永清
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-22
Filing date: 2005-03-22
Publication date: 2006-05-31
Anticipated expiration: 2015-03-22

Abstract

The utility model relates to a full-closed type thermosensitive protecting relay which comprises a thermosensitive element, an ejector rod, a guiding disk, a static contact, a movable contact, a supporting rack, an insulating inner casing, a metal outer casing, a connecting sheet and wire components, wherein a component formed by the movable contact, the supporting rack and the connecting sheet is riveted on the insulating inner casing; the static contact is also riveted on the insulating inner casing; the static contact contacts the movable contact, forming a loop; the wire components are respectively welded on one side of the connecting sheet and one side of the static contact; the thermosensitive element is positioned below the guiding disk and is arranged on a step at the bottom of the metal outer casing; the ejector rod is arranged in a via hole of the guiding disk. An annular metal ring is embedded in one end of the insulating inner casing, and the insulating inner casing and the metal outer casing are welded together through the metal ring. Because the utility model is an electrical device which is fully closed, the utility model has the advantages of full seal, small volume, spiffy action, reliability and stable performance.

Description

Full seal type temperature-sensitive protection relay

Technical field:

The utility model relates to the relay-set of mechanical electric apparatus overheat protection; refer in particular to and a kind ofly be applicable to that being installed in the automobile air conditioner compressor surface does overtemperature protection, also can be used for the full seal type temperature-sensitive protection relay that other are electronic, electroheat equipment is made overtemperature prote.

Background technology:

The mechanical type thermal protector that present automobile air conditioner compressor and some electric equipments adopt is that half plastic casing semimetal shell adds the fluid sealant sealing a bit, cause plastic casing premature aging or mechanical shock to burst apart easily in abominable operational environment such as some high temperature, humidity, greasy dirt, vibration, mechanical shock, metal and plastics joint portion fluid sealant come off protector can not be sealed so that lose efficacy; Some is a full metal jacket, and internal components does not design insulation inner casing layout, owing to be subjected to the restriction of installation dimension, shell and conducting metal spacing are little, and electrical security is not high, especially causes electric leakage during high pressure easily; Some is overheated by to the response indirect protection equipment of the overload current of compressor or electric equipment, because electric current is not the sole cause that causes apparatus overheat, so have error with actual conditions, causes reliability decrease.

Summary of the invention:

The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of energy direct response apparatus overtemperature is provided, and has the thermal relay of hermetic the contract machine or the device of overheating of electrical protection of metal shell body and insulation inner housing structure.

For achieving the above object, the technical scheme that the utility model provides is: it includes temperature-sensitive element, push rod, positioning disk, fixed contact, moving contact, bracing frame, insulation inner housing, metal shell body, brace and wire assembly, wherein, bracing frame one end is riveted or be welded on to moving contact, the other end is welded on the brace, the assembly staking that moving contact, bracing frame and brace constitute is on the insulation inner housing, fixed contact also is riveted on the insulation inner housing, and fixed contact contacts with moving contact and forms the loop; Wire assembly is welded on a side of brace and fixed contact respectively; Temperature-sensitive element is positioned at the positioning disk below and places on the step of metal shell body bottom, and push rod places in the through hole of positioning disk, and an end of push rod is aimed at and contacted on temperature-sensitive element, and the other end is aimed at the salient point of the bottom of bracing frame; The embedded annular metal of one end of insulation inner housing is guarded against son, and insulation inner housing and metal shell body are guarded against son by metal and welded together.

Described wire assembly respectively butt-joint on the lead division and brace of fixed contact, again with a capping be bonded in embedded rings sub on and form half closed container, be filled with the insulation filling agent in the semi-hermetic container.

Described temperature-sensitive element is a bimetal leaf.

The utility model is to utilize the characteristics design of temperature-sensitive temperature-sensitive element to form, and is installed on the surface of automobile air conditioner compressor, connects with the compressor clutch circuit.When compressor breaks down or other reasons when overtemperature occurring; the counter-rotating of protector temperature-sensitive element moment kick; pushing executing mechanism; cut off circuital current; the protection compressor is unlikely to overtemperature and destroys; and when temperature dropped to design temperature, the relay temperature-sensitive element automatically reset, the system restoration operate as normal.

After the utility model adopts technique scheme, formed an interior metal component layouts in the insulation inner casing, metal shell guards against sub-welded seal totally enclosed electrical installation together by the metal that is embedded on the inner casing.Therefore can reach hermetically sealed, volume is little, action is clear-cut, the effect of reliable, stable performance, and energy can adapt to than bad working environment.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described further,

Accompanying drawing 1 is the utility model cross-sectional view;

Accompanying drawing 2 removes structural representation after the capping for the utility model.

Embodiment:

See shown in accompanying drawing 1～accompanying drawing 2, the utility model includes temperature-sensitive element 1, push rod 2, positioning disk 3, fixed contact 4, moving contact 5, bracing frame 6, insulation inner housing 7, metal shell body 8, brace 9 and

wire assembly

13 and 14, wherein, an end of bracing frame 6 is riveted or be welded on to moving contact 5, and the other end of bracing frame 6 is welded on the brace 9.The assembly staking that moving contact 5, bracing frame 6 and brace 12 constitute is in a groove of insulation inner housing 7, and fixed contact 4 is riveted in another groove of insulation inner housing 7, and moving contact 5 contacts with fixed contact 4 and forms the loop.The embedded annular metal of insulation inner housing 7 one ends is guarded against son 10 (when 7 injection mouldings of insulation inner housing with sub 10 injection mouldings of embedded rings).Temperature-sensitive element 1 is positioned on the step 8a of metal shell body 8 bottoms, positioning disk 3 places on the step 8a of metal shell body 8 bottoms, temperature-sensitive element 1 is in the circular groove of positioning disk 3, push rod 2 is packed in the through hole of positioning disk 3, one end of push rod 2 is aimed at and is contacted on temperature-sensitive element 1, and the other end is aimed at the salient point 6a of the bottom of bracing frame 6.Moving contact 5, fixed contact 4, bracing frame 6 and brace 9, the embedded son 10 of guarding against is placed on the annular groove of positioning disk 3 with the assembly that insulation inner housing 7 constitutes, and makes the interior metal device layout in the inner chamber that insulation inner housing 7 and insulation positioning disk 3 are combined into.The bead of metal shell body 8 and the embedded insulation inner housing 7 of guarding against son 9 weld together, and form metal shell body 8 and are sealed with the mode of insulation inner housing 7 by welding.Wire assembly 13 and wire assembly 14 are connected a side of brace 9 and fixed contact 4 respectively with the mode of butt-joint, capping 11 usefulness bonding agents are connected on embedded ring 10 and form a semi-enclosed container 12.12 pour into the insulation filling agent in this semi-enclosed container, and

wire assembly

13 and 14 sealings are cemented in semi-enclosed container 12.Form an interior metal component layouts in insulation inner housing 7, metal shell body 8 is guarded against sub 10 welded seals totally enclosed electrical installation together by the metal that is embedded on the insulation inner housing 7.

In use the utility model is installed in compressor heat induction place, metal shell body 8 bottoms are close to compressor heat induction place, and wire assembly 13 and wire assembly 14 insert the load major loop respectively.When the compressor operate as normal, temperature is lower than the rated temperature of setting.This not counter-rotating of device temperature-sensitive element 1, push rod 2 is in free state, moving contact 5 keeps connecting under the elastic force of bracing frame 6 with fixed contact 4, electric current flows to wire assembly 14 by wire assembly 13 through brace 9, bracing frame 6, moving contact 5, fixed contact 4 and constitutes the loop, makes electric current flow through load through the utility model.When compressor breaks down; load temperature raises; heat is by metal shell body 8 of the present utility model; pass to temperature-sensitive element 1, when temperature reaches when setting the protection value, 1 moment of temperature-sensitive element upwards counter-rotating promote push rod 2 to top offset; push rod 2 promotes bracing frame 6 displacements; make moving contact 5 leave fixed contact 4, cut off load circuit, load is protected.The temperature decline of load outage back, the temperature of temperature-sensitive element 1 also descends simultaneously, and when temperature dropped to design temperature, temperature-sensitive element 1 moment counter-rotating downwards resetted, and bracing frame 6 connects moving contact 5 and fixed contact 4 because self elastic force effect drive moving contact 5 resets.Load circuit recovers to connect, and has finished a hot protection period circulation.Thereby the protection compressor is unlikely to break down or burn because of overheated.

Temperature-sensitive element 1 of the present utility model adopts bimetal leaf, through the special process moulding.Be specially adapted to the mechanical electric equipment of working in adverse circumstances (as: humidity, greasy dirt, vibration etc.) lining.

The embodiment of the above is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model with this, so the equivalence that all shapes according to the utility model, structure and principle are done changes, all should be covered by in the protection range of the present utility model.

Claims

1, full seal type temperature-sensitive protection relay, include temperature-sensitive element (1), push rod (2), positioning disk (3), fixed contact (4), moving contact (5), bracing frame (6), insulation inner housing (7), metal shell body (8), brace (9), and wire assembly (13) and (14), it is characterized in that: bracing frame (6) one ends are riveted or be welded on to moving contact (5), the other end is welded on the brace (9), moving contact (5), the assembly staking that bracing frame (6) and brace (9) constitute is on insulation inner housing (7), fixed contact (4) also is riveted on the insulation inner housing (7), and fixed contact (4) contacts with moving contact (5) and forms the loop; Wire assembly (13) and (14) are welded on a side of brace (9) and fixed contact (4) respectively; Temperature-sensitive element (1) is positioned at positioning disk (3) below and places on the step (8a) of metal shell body (8) bottom, push rod (2) places in the through hole of positioning disk (3), one end of push rod (2) is aimed at and is contacted on temperature-sensitive element (1), and the other end is aimed at the salient point (6a) of the bottom of bracing frame (6); The embedded annular metal of one end of insulation inner housing (7) is guarded against son (10), and insulation inner housing (7) is guarded against son (10) with metal shell body (8) by metal and welded together.

2, full seal type temperature-sensitive protection relay according to claim 1; it is characterized in that: wire assembly (13) and the butt-joint of (14) difference are on the lead division and brace (9) of fixed contact (4); have a capping (11) to be bonded in embedded ring (10) and go up and form half closed container (12), the semi-hermetic container is filled with the insulation filling agent in (12).

3, full seal type temperature-sensitive protection relay according to claim 1 is characterized in that: described temperature-sensitive element (1) is a bimetal leaf.