CN216353956U - Temperature-controlled circuit breaker - Google Patents
Temperature-controlled circuit breaker Download PDFInfo
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- CN216353956U CN216353956U CN202122315169.4U CN202122315169U CN216353956U CN 216353956 U CN216353956 U CN 216353956U CN 202122315169 U CN202122315169 U CN 202122315169U CN 216353956 U CN216353956 U CN 216353956U
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- fixed electrode
- circuit breaker
- sheet
- movable electrode
- connecting part
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Abstract
The utility model discloses a temperature control circuit breaker, which comprises an upper shell, a lower shell, a fixed electrode plate and a movable electrode plate, wherein the connecting part of the fixed electrode plate and the connecting part of the movable electrode plate are both positioned in a cavity formed by the upper shell and the lower shell, a positive temperature coefficient thermistor and a surge absorption element are arranged on the connecting part of the fixed electrode plate, a composite metal sheet is arranged on the positive temperature coefficient thermistor, the composite metal sheet is positioned between the positive temperature coefficient thermistor and the connecting part of the movable electrode plate, and the surge absorption element is positioned between the connecting part of the movable electrode plate and the connecting part of the fixed electrode plate. The utility model provides a temperature control circuit breaker, which prolongs the service life and improves the stability of a product.
Description
Technical Field
The utility model relates to a temperature-controlled circuit breaker.
Background
At present, when the over-temperature and over-current or the environment temperature is too high, electronic components in the circuit can be burnt, the conventional solution is that a temperature control circuit breaker is added in the circuit, and the temperature control circuit breaker breaks off the circuit connection along with the temperature rise to the over-temperature protection value, so that the protection effect is achieved. The inside of the existing temperature-controlled circuit breaker usually adopts a composite metal sheet which can deform along with the temperature change, and the electric connection between a movable electrode plate and a fixed electrode plate in the temperature-controlled circuit breaker is changed through the deformation of the composite metal sheet, so that the on-off of a circuit is controlled. However, at the moment when the movable electrode sheet is disconnected and connected with the fixed electrode sheet, an arc is generated due to the action of a large current, so that a contact between the movable electrode sheet and the fixed electrode sheet is damaged, the stability of the circuit breaker is influenced, and the service life of the circuit breaker is shortened.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art and provides a temperature control circuit breaker, which prolongs the service life and improves the stability of a product.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a temperature control circuit breaker, it includes casing, lower casing, fixed electrode piece and movable electrode piece, the connecting portion of fixed electrode piece and the connecting portion of movable electrode piece all are located casing and the cavity of casing constitution down, be provided with positive temperature coefficient thermistor and surge absorbing element on the connecting portion of fixed electrode piece, be provided with the composite metal piece on the positive temperature coefficient thermistor, the composite metal piece is located between the connecting portion of positive temperature coefficient thermistor and movable electrode piece, surge absorbing element is located between the connecting portion of movable electrode piece and the connecting portion of fixed electrode piece.
Further, the surge absorbing element is an MOV metal oxide varistor or a TVS tube.
Further, one end of the movable electrode plate is provided with a movable contact;
when the composite metal sheet is not deformed, the connecting part of the movable electrode sheet is electrically connected with the connecting part of the fixed electrode sheet through the movable contact;
when the composite metal sheet is deformed, the movable contact is disconnected with the connecting part of the fixed electrode sheet.
Further, a first mounting groove for mounting the positive temperature coefficient thermistor and a second mounting groove for mounting the surge absorbing element are formed in the lower shell.
Further, a heat conducting sheet is embedded in the upper shell and located above the movable electrode plate, and an upper through hole for heat conduction of the heat conducting sheet is formed in the top surface of the upper shell.
Furthermore, the connecting part of the fixed electrode plate is embedded in the lower shell, and the bottom surface of the lower shell is provided with a lower through hole for heat conduction of the connecting part of the fixed electrode plate.
By adopting the technical scheme, the surge absorption element is connected in parallel with the fixed electrode plate and the movable electrode plate, and when the fixed electrode plate and the movable electrode plate are switched on and off, electric arcs generated between the fixed electrode plate and the movable electrode plate are suppressed by the surge absorption element, so that the normal work of a circuit is effectively protected, the service life is prolonged, and the reliability of the temperature control circuit breaker is improved. In addition, the upper shell and the lower shell of the utility model are respectively provided with an open type heat conduction structure, so that the heat conduction performance of the temperature control circuit breaker is improved when in use: the heat in the temperature control device is discharged in time, so that the influence of the heat which cannot be discharged in time on the recovery deformation of the composite metal sheet is reduced as much as possible; when the environmental temperature is higher, the external heat is quickly transmitted into the temperature control device, so that the composite metal sheet generates directional change at a specific temperature as soon as possible to push the movable sheet, the movable contact enters different states, the on-off of the fixed electrode sheet and the movable electrode sheet is controlled, and the temperature control sensitivity and stability are further improved.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a temperature-controlled circuit breaker according to the present invention;
fig. 2 is a bottom view of a temperature controlled circuit breaker of the present invention;
fig. 3 is a top view of a temperature controlled circuit breaker of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 3, the present embodiment provides a temperature-controlled circuit breaker, which includes an upper casing 6, a lower casing 7, a fixed electrode piece 2, and a movable electrode piece 1, wherein a connecting portion of the fixed electrode piece 2 and a connecting portion of the movable electrode piece 1 are both located in a cavity formed by the upper casing 6 and the lower casing 7, and a positive temperature coefficient thermistor 5 and a surge absorbing element 9 are arranged on the connecting portion of the fixed electrode piece 2.
As shown in fig. 1, the ptc thermistor 5 of the present embodiment is provided with a composite metal sheet 4, the composite metal sheet 4 is located between the ptc thermistor 5 and the connection portion of the movable electrode sheet 1, the surge absorption element 9 is located between the connection portion of the movable electrode sheet 1 and the connection portion of the fixed electrode sheet 2, the upper lead of the surge absorption element 9 is connected to the movable electrode sheet 1, the lower lead of the surge absorption element 9 is connected to the fixed electrode sheet 2, and the surge absorption element 9 in the present embodiment is an MOV metal oxide varistor or a TVS tube.
One end of the movable electrode slice 1 is provided with a movable contact 3;
the composite metal sheet 4 is deformed when the environmental temperature changes, and the force generated by the deformation generates directional change at a specific temperature to push the composite metal sheet 4 to reverse, so that the movable contact 3 enters different states:
when the composite metal sheet 4 is not deformed, the current and the temperature in the circuit are normal, and the connecting part of the movable electrode sheet 1 is electrically connected with the connecting part of the fixed electrode sheet 2 through the movable contact 3;
when the temperature rises due to the abnormal circuit and the abnormal overcurrent generated in the circuit rises, the composite metal sheet 4 deforms, the composite metal sheet 4 is changed from the shape shown in fig. 1 into a shape with two ends tilted upwards until the connecting part of the movable electrode plate 1 is jacked up, so that the movable contact 3 is disconnected with the connecting part of the fixed electrode plate 2, at the moment, the movable electrode plate 1, the composite metal sheet 4, the positive temperature coefficient thermistor 5 and the fixed electrode plate 2 form electrical connection, at the moment, the resistance of the positive temperature coefficient thermistor 5 is large under the influence of the temperature rise, a small continuous-temperature working current flows through the positive temperature coefficient thermistor 5, the positive temperature coefficient thermistor 5 is in a high-temperature state, and the composite metal sheet 4 above the positive temperature coefficient thermistor maintains the state with two ends tilted, so that the protection effect is achieved. After the circuit fault is cleared and the circuit is recovered to be normal, the two ends of the composite metal sheet 4 fall to the initial positions shown in the figure 1, the connection part of the movable electrode sheet 1 is electrically connected with the connection part of the fixed electrode sheet 2 through the movable contact 3, and the circuit works normally;
when the connection part between the movable contact 3 on the movable electrode sheet 1 and the fixed electrode sheet 2 is opened or closed, a contact arc is generated between the movable electrode sheet 1 and the fixed electrode sheet 2, and at this time, the surge absorbing element 9 is connected in parallel between the movable electrode sheet 1 and the fixed electrode sheet 2, and the contact arc is introduced into the surge absorbing element 9 and eliminated.
As shown in fig. 1, a first mounting groove for mounting the ptc thermistor 5 and a second mounting groove for mounting the surge absorbing element 9 are provided in the lower housing 7, and the bottoms of the first mounting groove and the second mounting groove are both hollow structures, so that the ptc thermistor 5 and the surge absorbing element 9 are in contact with the connecting portion of the fixed electrode sheet 2, and the shapes of the first mounting groove and the second mounting groove are determined according to the ptc thermistor 5 and the surge absorbing element 9, and may be square or circular.
As shown in fig. 3, the heat conducting sheet 8 is embedded in the upper housing 6, the heat conducting sheet 8 is located above the movable electrode plate 1, and the top surface of the upper housing 6 is provided with an upper through hole 61 for heat conduction of the heat conducting sheet 8, so that the heat conducting sheet 8 is better contacted with the external environment, and the heat conduction effect is improved.
As shown in fig. 2, the connecting portion of the fixed electrode tab 2 is embedded in the lower case 7, and the bottom surface of the lower case 7 is provided with a lower through hole 71 for heat conduction of the connecting portion of the fixed electrode tab 2, thereby improving the heat conduction effect.
The technical problems, technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, and it should be understood that the above embodiments are merely exemplary and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a temperature control circuit breaker, its characterized in that, it includes casing (6), lower casing (7), fixed electrode piece (2) and movable electrode piece (1), the connecting portion of fixed electrode piece (2) and the connecting portion of movable electrode piece (1) all are located the cavity that casing (6) and lower casing (7) are constituteed, be provided with positive temperature coefficient thermistor (5) and surge absorbing element (9) on the connecting portion of fixed electrode piece (2), be provided with composite metal piece (4) on positive temperature coefficient thermistor (5), composite metal piece (4) are located between the connecting portion of positive temperature coefficient thermistor (5) and movable electrode piece (1), surge absorbing element (9) are located between the connecting portion of movable electrode piece (1) and the connecting portion of fixed electrode piece (2).
2. A temperature controlled circuit breaker as claimed in claim 1, wherein: the surge absorbing element (9) is an MOV metal oxide varistor or a TVS tube.
3. A temperature controlled circuit breaker as claimed in claim 1, wherein: one end of the movable electrode sheet (1) is provided with a movable contact (3);
when the composite metal sheet (4) is not deformed, the connecting part of the movable electrode sheet (1) is electrically connected with the connecting part of the fixed electrode sheet (2) through the movable contact (3);
when the composite metal sheet (4) deforms, the movable contact (3) is disconnected from the connecting part of the fixed electrode sheet (2).
4. A temperature controlled circuit breaker as claimed in claim 1, wherein: and a first mounting groove for mounting the positive temperature coefficient thermistor (5) and a second mounting groove for mounting the surge absorption element (9) are formed in the lower shell (7).
5. A temperature controlled circuit breaker as claimed in claim 1, wherein: the upper shell (6) is internally embedded with a heat conducting sheet (8), the heat conducting sheet (8) is positioned above the movable electrode plate (1), and the top surface of the upper shell (6) is provided with an upper through hole (61) for heat conduction of the heat conducting sheet (8).
6. A temperature controlled circuit breaker as claimed in claim 1, wherein: the connecting part of the fixed electrode slice (2) is embedded in the lower shell (7), and the bottom surface of the lower shell (7) is provided with a lower through hole (71) for heat conduction of the connecting part of the fixed electrode slice (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122315169.4U CN216353956U (en) | 2021-09-24 | 2021-09-24 | Temperature-controlled circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122315169.4U CN216353956U (en) | 2021-09-24 | 2021-09-24 | Temperature-controlled circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216353956U true CN216353956U (en) | 2022-04-19 |
Family
ID=81172927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122315169.4U Active CN216353956U (en) | 2021-09-24 | 2021-09-24 | Temperature-controlled circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216353956U (en) |
-
2021
- 2021-09-24 CN CN202122315169.4U patent/CN216353956U/en active Active
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