CN214479550U - Integrated overcurrent and overheat PTC starting protector - Google Patents
Integrated overcurrent and overheat PTC starting protector Download PDFInfo
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- CN214479550U CN214479550U CN202120636105.1U CN202120636105U CN214479550U CN 214479550 U CN214479550 U CN 214479550U CN 202120636105 U CN202120636105 U CN 202120636105U CN 214479550 U CN214479550 U CN 214479550U
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Abstract
An integrated overcurrent and overheat PTC starting protector relates to the technical field of electric devices and comprises a shell, wherein a PTC chip and two elastic electrodes are arranged in the shell, one elastic electrode is connected with an input terminal, and the other elastic electrode is connected with an output terminal; a static contact, a bimetallic strip and a movable contact are also arranged in the shell, the static contact is connected in the shell, one end of the bimetallic strip is connected with an insulating lifting rod, a sleeve is arranged on the insulating lifting rod, and the sleeve is fixed in the shell; the movable contact is connected with the other end of the bimetallic strip, is arranged above the fixed contact and is in separable contact with the fixed contact; the bimetallic strip is connected with an insulating pressure rod, the insulating pressure rod is connected with the shell through a spring, and the insulating pressure rod is also connected with an insulating lifting rod through a connecting rod; the static contact is connected with a power input interface, and the power input interface is connected with the input terminal; the bimetallic strip is connected with a power output interface, and the power output interface is connected with an output terminal. The utility model discloses the security is high.
Description
Technical Field
The utility model relates to an electrical part technical field especially relates to the structure of installing the protector on the compressor.
Background
In order to ensure the safety of electricity utilization, a current overload protector is usually designed in an electrical appliance, and when a circuit is abnormal, the circuit is automatically disconnected through a bimetallic strip of the current overload protector, so that dangerous accidents are avoided. But the current overload protector cannot be powered off in time in actual use, so that the safety coefficient of the current overload protector is low; and when the fault is not solved, the bimetallic strip can restore power supply quickly, and potential safety hazard is easily caused if the power supply is forgotten to be cut off. In addition, the PTC starter is widely applied to auxiliary starting of the compressor, and because the compressor is frequently started, the PTC chip is cracked after bearing large current impact at the moment of starting for ten thousand times on the starter chip, particularly abnormal voltage or abnormal current, and is fixed by the reed, so that the contact short circuit of the reed can be caused, and more serious damage is caused. And the current overload protector and the PTC starter are separately arranged, so that the problems of large size, complex structure, slow heat transfer and the like exist.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, provide a high integral type of security and overflow overheated PTC start protector.
The purpose of the utility model is realized like this: an integrated overcurrent and overheat PTC starting protector comprises a shell, wherein a PTC chip and two elastic electrodes are arranged in the shell, the PTC chip is vertically arranged and clamped between the two elastic electrodes, one elastic electrode is connected with an input terminal, and the other elastic electrode is connected with an output terminal; a static contact, a bimetallic strip and a movable contact are also arranged in the shell, the static contact is connected in the shell, one end of the bimetallic strip is connected with an insulating lifting rod, a sleeve is arranged on the insulating lifting rod, and the sleeve is fixed in the shell; the movable contact is connected to the other end of the bimetallic strip, and is arranged above the fixed contact and is in separable contact with the fixed contact; the bimetallic strip is connected with an insulating pressure rod, the insulating pressure rod is connected with the shell through a spring, and the insulating pressure rod is also connected with an insulating lifting rod through a connecting rod; the static contact is connected with a power input interface, and the power input interface is connected with an input terminal; the bimetallic strip is connected with a power output interface, and the power output interface is connected with an output terminal; the power output interface and the power input interface extend out of the shell.
When the device normally operates, the movable contact is in contact with the fixed contact and is pressed by the insulating pressure rod to supply power to the electric appliance; when overload occurs, the bimetallic strip deforms to drive the insulating pressure rod to move upwards, meanwhile, the connecting rod drives the insulating lifting rod to move upwards, the movable contact and the static contact are ensured to be separated to open a loop, at the moment, the current forms a loop through the PTC chip, the PTC chip is a positive temperature coefficient thermistor and generates heat after being electrified, the bimetallic strip on one side is kept in a high-temperature state, the bimetallic strip cannot reset due to recovery deformation, only after the power supply is cut off, the bimetallic strip and the PTC chip can reset after being cooled, and the safety of maintenance personnel is ensured.
The utility model discloses a two elastic electrode all are the V-arrangement, and one of them elastic electrode's both ends and PTC chip contact setting, another elastic electrode's middle part and PTC chip contact setting. Because the force points on the left side of the PTC chip are two points, and the force point on the right side is between the two force points on the left side, when the PTC chip is broken, the elastic electrodes on the left side and the right side are not contacted, so that the short circuit is avoided.
In order to facilitate the connection of the wires, wire holes are formed in the outer end of the power output interface and the outer end of the power input interface, and locking screws are connected in the wire holes.
In order to facilitate installation and safety, the shell comprises an upper shell and a base, the base is connected to the lower portion of the upper shell, and insulating paper is arranged between the base and the upper shell.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from a-a in fig. 1.
Detailed Description
As shown in fig. 1 and 2, the integrated overcurrent and overheat PTC starting protector comprises a housing 1, wherein the housing 1 comprises an upper housing 101 and a base 103, the base 103 is connected below the upper housing 101, and an insulating paper 102 is arranged between the base 103 and the upper housing 101.
Set up PTC chip 9 and two elastic electrode 8 in casing 1, PTC chip 9 is circular, and PTC chip 9 vertical arrangement and centre gripping are between two elastic electrode 8, and two elastic electrode 8 all are the V-arrangement, and the both ends of one of them elastic electrode 8 set up with PTC chip 9 contact, and the middle part of another elastic electrode 8 sets up with PTC chip 9 contact. One of the elastic electrodes 8 is connected to the input terminal 7, and the other elastic electrode 8 is connected to the output terminal 10. The force points on the left side of the PTC chip 9 have two points, and the force point on the right side is between the two force points on the left side, so when the PTC chip 9 is broken, the elastic electrodes 8 on the left side and the right side do not contact, and the short circuit is avoided.
A static contact 5, a bimetallic strip 4 and a movable contact 6 are further arranged in the shell 1, the static contact 5 is connected to the base 103, one end of the bimetallic strip 4 is connected with the insulating lifting rod 3, a sleeve 2 is arranged on the insulating lifting rod 3, and the sleeve 2 is fixed on the base 103. The movable contact 6 is connected with the other end of the bimetallic strip 4, and the movable contact 6 is arranged above the fixed contact 5 and is in separable contact with the fixed contact 5. An insulating pressure rod 12 is connected to the bimetallic strip 4, the upper end of the insulating pressure rod 12 is connected with a spring 11, the upper end of the spring 11 is connected with the shell 1, and the insulating pressure rod 12 is further connected with the insulating lifting rod 3 through a connecting rod 13. The stationary contact 5 is connected to a power input interface 16, and the power input interface 16 is connected to the input terminal 7. The bimetallic strip 4 is connected with a power output interface 14, and the power output interface 14 is connected with the output terminal 10. The power output interface 14 and the power input interface 16 both extend out of the casing 1, wire holes are formed in the outer end of the power output interface 14 and the outer end of the power input interface 16, and locking screws 15 are connected in the wire holes to facilitate connection of wires.
The working principle is as follows: when the device normally operates, the movable contact 6 is contacted with the fixed contact 5 and is pressed by the insulating pressure lever 12 to supply power to the electric appliance; when overload occurs, the bimetallic strip 4 deforms to drive the insulating pressure rod 12 to move upwards, meanwhile, the connecting rod 13 drives the insulating lifting rod 3 to move upwards to ensure that the movable contact 6 and the fixed contact 5 are separated to cut open a loop, and current flows into the PTC chip 9 through the input power supply input interface 16 and the input terminal 7 and then flows out through the output terminal 10 and the power supply output interface 14. The current flowing through the PTC chip 9 makes the PTC chip 9 release heat and raise the temperature, because the PTC chip 9 is a positive temperature coefficient thermistor, the PTC chip 9 generates heat after being electrified, the bimetallic strip 4 on one side is kept in a high-temperature state all the time, the bimetallic strip 4 cannot reset due to recovery deformation, and the danger of equipment rerunning caused by automatic resetting of the bimetallic strip 4 is avoided. Only after the power supply is cut off, the bimetallic strip 4 and the PTC chip 9 can reset after being cooled, and the safety of maintenance personnel is ensured.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (4)
1. The utility model provides an integral type excessive heat PTC start protector, includes the casing, characterized by: the PTC chip is vertically arranged and clamped between the two elastic electrodes, one elastic electrode is connected with the input terminal, and the other elastic electrode is connected with the output terminal; a static contact, a bimetallic strip and a movable contact are also arranged in the shell, the static contact is connected in the shell, one end of the bimetallic strip is connected with an insulating lifting rod, a sleeve is arranged on the insulating lifting rod, and the sleeve is fixed in the shell; the movable contact is connected to the other end of the bimetallic strip, and is arranged above the fixed contact and is in separable contact with the fixed contact; the bimetallic strip is connected with an insulating pressure rod, the insulating pressure rod is connected with the shell through a spring, and the insulating pressure rod is also connected with an insulating lifting rod through a connecting rod; the static contact is connected with a power input interface, and the power input interface is connected with an input terminal; the bimetallic strip is connected with a power output interface, and the power output interface is connected with an output terminal; the power output interface and the power input interface extend out of the shell.
2. An integrated overcurrent and overheat PTC start-up protector according to claim 1, wherein: two elastic electrodes are both V-shaped, two ends of one elastic electrode are in contact with the PTC chip, and the middle part of the other elastic electrode is in contact with the PTC chip.
3. An integrated overcurrent and overheat PTC start-up protector according to claim 1, wherein: and wire holes are formed in the outer end of the power output interface and the outer end of the power input interface, and locking screws are connected in the wire holes.
4. An integrated overcurrent and overheat PTC start-up protector according to claim 1, wherein: the casing includes casing and base, and the base is connected in the below of last casing, sets up insulating paper between base and last casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120636105.1U CN214479550U (en) | 2021-03-30 | 2021-03-30 | Integrated overcurrent and overheat PTC starting protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120636105.1U CN214479550U (en) | 2021-03-30 | 2021-03-30 | Integrated overcurrent and overheat PTC starting protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214479550U true CN214479550U (en) | 2021-10-22 |
Family
ID=78175691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120636105.1U Active CN214479550U (en) | 2021-03-30 | 2021-03-30 | Integrated overcurrent and overheat PTC starting protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214479550U (en) |
-
2021
- 2021-03-30 CN CN202120636105.1U patent/CN214479550U/en active Active
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