CN109546893B - PTC starter - Google Patents
PTC starter Download PDFInfo
- Publication number
- CN109546893B CN109546893B CN201910078635.6A CN201910078635A CN109546893B CN 109546893 B CN109546893 B CN 109546893B CN 201910078635 A CN201910078635 A CN 201910078635A CN 109546893 B CN109546893 B CN 109546893B
- Authority
- CN
- China
- Prior art keywords
- electrode plate
- chip
- ptc
- ptc chip
- limiting block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000007858 starting material Substances 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 20
- 239000003063 flame retardant Substances 0.000 claims abstract description 16
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 6
- 210000003205 muscle Anatomy 0.000 claims 3
- 230000005611 electricity Effects 0.000 claims 1
- 239000012634 fragment Substances 0.000 description 7
- 238000010008 shearing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/027—Special design of starting resistor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a PTC starter, which comprises two electrode plates capable of elastically clamping an object, wherein the two electrode plates are arranged at two ends of two sides of a PTC chip in a staggered manner and are electrically connected, an electrically insulating and flame-retardant first limiting block is abutted against one side of the PTC chip opposite to the first electrode plate in a staggered manner, an electrically insulating and flame-retardant second limiting block is abutted against one side of the middle part of the PTC chip opposite to the second electrode plate, the first electrode plate is positioned between the first limiting block and the second limiting block, an electrically insulating and flame-retardant rib is arranged at one side of the PTC chip opposite to the second limiting block, a gap is reserved between the rib and the PTC chip, and the rib is also positioned between the second limiting block and the second electrode plate. The structure prevents the cracked chip from inclining to one side through the blocking rib, the blocking rib can also clamp the chip split, the chip split is blocked from another chip split or the second electrode plate, and the chip split is prevented from being communicated with the first electrode plate and the second electrode plate again.
Description
Technical Field
The invention relates to a compressor starter, in particular to a PTC starter.
Background
The PTC chip is a barium titanate type semiconductor which is processed by a ceramic process and doped with trace rare earth elements, namely a thermistor with positive temperature characteristics. The impedance is low at normal temperature, the impedance is connected in series in a circuit to form a channel state, and when the element generates heat by current, the impedance is rapidly increased to form a high-impedance state. The PTC starter is typically connected in series to the secondary winding circuit of the compressor, and the current flowing through the start winding during start-up of the compressor causes the PTC element to rapidly increase in temperature, and the current flowing through the PTC chip decreases due to the increase in temperature of the PTC chip, and at this time the compressor enters a normal operation state.
The PTC chip of the existing PTC starter is generally installed in the inner space of the case, and the electrode plates are installed at opposite sides of the PTC chip to be connected with the external terminals. As shown in fig. 1, the structure has uncertainty of pushing direction when the PTC chip fails and breaks, and the electrode plates positioned at two sides of the PTC chip can easily and stably hold the residual part of the PTC chip; or the electrode plate can not clamp one end of the PTC chip, the residual part of the PTC chip is positioned between the two electrode plates again to play a role of connection and electrification, the invalid PTC chip at the moment has no positive temperature characteristic, current can continuously pass through the residual part of the PTC chip, and the structure is equivalent to short circuit, so that high-temperature ignition can be caused.
Disclosure of Invention
The invention provides a PTC starter which can prevent a PTC chip from contacting two electrode plates in a broken state and prevent the two electrode plates from being contacted and conducted.
The PTC starter comprises two electrode plates capable of elastically clamping an object, wherein the two electrode plates are arranged at two ends of two sides of a PTC chip in a staggered mode and are electrically connected, an electrically insulating and flame-retardant first limiting block is abutted against one side of the PTC chip opposite to the first electrode plate in a staggered mode, an electrically insulating and flame-retardant second limiting block is abutted against one side of the middle of the PTC chip opposite to the second electrode plate, the first electrode plate is located between the first limiting block and the second limiting block, an electrically insulating and flame-retardant rib is arranged on one side of the PTC chip opposite to the second limiting block, a gap is reserved between the rib and the PTC chip, and the rib is located between the second limiting block and the second electrode plate.
According to the PTC starter disclosed by the invention, the first electrode plate and the first limiting block relatively clamp the two ends of the two sides of the PTC chip, the second electrode plate and the second limiting block are relatively staggered to tightly support the PTC chip, and stress is dispersed by staggering stress points of the two electrode plates and the two limiting blocks on the PTC chip, so that the PTC chip can be better clamped; the blocking rib is arranged between the second limiting block and the second electrode plate to prevent the cracked chip from tilting to one side of the second electrode plate, so that the cracked chip is prevented from contacting with the tail end of the second electrode plate again; a gap is formed between the blocking rib and the PTC chip, and when the first electrode plate extrudes the broken chip, the first electrode plate has a certain free inclination, and the shearing force is dispersed, so that the chip is clamped; the rib can be matched with the second limiting block, and the clamping force of the first electrode plate and the first limiting block can force the chip split clamped between the first electrode plate and the first limiting block to incline towards the rib blocking direction, so that the rib can block the chip split on one side of the first electrode plate, the chip split is prevented from falling and being contacted and conducted with the second electrode plate again, and hidden danger of high-temperature fire due to short circuit is effectively prevented.
Drawings
Fig. 1 is a schematic view of a conventional PTC starter.
Fig. 2 is a schematic structural view of a PTC starter.
Fig. 3 is a schematic diagram showing a PTC chip failure state of the PTC starter.
Fig. 4 is a schematic diagram showing a PTC chip failure state of the PTC starter.
Fig. 5 is a sectional view taken along line A-A of one of the PTC actuators of fig. 2.
Fig. 6 is a B-B sectional view of one of the PTC actuators of fig. 2.
Detailed Description
As shown in fig. 2, a PTC starter comprises two electrode plates which can elastically clamp objects, wherein the two electrode plates are arranged at two ends of two sides of a PTC chip (1) in a staggered manner and are electrically connected, a first electric insulation flame-retardant limiting block (4) is abutted against one side of the PTC chip (1) opposite to the first electrode plate (2), a second electric insulation flame-retardant limiting block (5) is abutted against one side of the middle part of the PTC chip (1) opposite to the second electrode plate (3), the first electrode plate (2) is positioned between the first limiting block (4) and the second limiting block (5), a second electric insulation flame-retardant limiting block (6) is arranged on one side of the PTC chip (1) opposite to the second limiting block (5), and a gap is reserved between the rib (6) and the PTC chip (1), and the rib (6) is also positioned between the second limiting block (5) and the second electrode plate (3). The two electrode plates are arranged at two ends of two sides of the PTC chip in a staggered manner and matched with two limiting blocks arranged in a staggered manner to be abutted against two sides of the PTC chip, and because the abutting positions of the two electrode plates to the PTC chip and the abutting positions of the two limiting blocks to the PTC chip are not in the same straight line, shearing force exists, the PTC chip is clamped by the shearing force, and when the PTC chip is cracked, the chip cracking is pushed away in the opposite direction due to the elastic deformation of the electrode plates; because the pushing distance of the split leaves is too large after the chip fails, the clamping of the first electrode plate and the first limiting block to the PTC chip is loosened, and the broken chip is prevented from tilting to one side of the second electrode plate by arranging the blocking rib between the second limiting block and the second electrode plate, so that the broken chip is prevented from contacting with the tail end of the second electrode plate again; a gap is formed between the blocking rib and the PTC chip, and when the first electrode plate extrudes the broken chip, the first electrode plate has a certain free inclination, and the shearing force is dispersed, so that the chip is clamped; the rib can be matched with the second limiting block, and the clamping force of the first electrode plate and the first limiting block can force the chip split clamped between the first electrode plate and the first limiting block to incline towards the rib blocking direction, so that the rib can block the chip split on one side of the first electrode plate, and the chip split is prevented from falling and being contacted and conducted with the second electrode plate again.
As shown in fig. 3, when the PTC chip breaking portion is located on one side of the rib near the stopper, because the abutting positions of the first electrode plate and the first stopper on the PTC chip are not in the same position, there is a shearing force, one of the chip splits is clamped, and one end of the chip split, which is not clamped, is inclined towards the direction of the rib, even if the chip split is not clamped by the first electrode plate and the first stopper, the chip split can be clamped by the rib, and the chip split and the other chip split or the second electrode plate are blocked, so that the chip split is prevented from being communicated with the first electrode plate and the second electrode plate again.
As shown in fig. 4, when the PTC chip breaking portion is located at a side of the rib near the second electrode plate, the first electrode plate and the first limiting block are not located at the same position in the tight position of the PTC chip, so that a shearing force exists, a gap exists between the rib and the surface of the chip, one of the chip splits clamped by the first electrode plate and the first limiting block inclines towards the direction of the rib, and the rib can clamp the chip split to prevent the chip split from contacting and communicating with the second electrode plate.
As shown in fig. 5, in the PTC starter, the top end of the rib (6) has a level difference (α) with the second electrode plate (3);
the level difference (alpha) is 1.1mm-1.3mm; the blocking rib and the second electrode plate have a horizontal height difference, after the PTC chip is broken, the second electrode plate is stressed, deformed and restored to be not interfered with the blocking rib, the blocking rib is prevented from being blocked by the second electrode plate, and the second electrode plate and the PTC fragments are contacted to conduct a circuit again.
The top end of the blocking rib (6) is an inclined surface (7), and the inclined surface is directed to one side, back to the middle part of the PTC chip, from the top end of the blocking rib; by arranging the inclined surface at the top end of the blocking rib, enough fixing acting force can be provided for the broken pieces of the PTC chip.
The distance between the electrically-insulating flame-retardant first limiting block (4) and the first electrode plate (2) in the stress-free state of the PTC starter is smaller than the thickness of the PTC chip (1); the distance between the second limiting block (5) which is electrically insulated and flame-retardant and the second electrode plate (3) which is in a stress-free state is larger than the thickness of the PTC chip (1); after the PTC chip is assembled, the first electrode plate and the second electrode plate are stressed and deformed to clamp the PTC chip, and after the PTC chip fails and breaks, the first electrode plate returns to the initial state towards the first limiting block because the distance between the first electrode plate and the first limiting block is smaller than the thickness of the PTC chip in the initial state without stress, so that fragments of the PTC chip positioned on the first electrode plate and the first limiting block can be clamped; because the distance between the second limiting block and the second electrode plate in the stress-free state is larger than the thickness of the PTC chip (1), after the PTC chip fails and breaks, the PTC chip fragments positioned between the second electrode plate and the second limiting block cannot be clamped and fall off, and the PTC chip fragments are effectively prevented from conducting the first electrode plate and the second electrode plate again.
As shown in fig. 6, in the PTC starter, the first limiting block is a cylinder with one side having a right triangle shape, wherein one plane is in contact with the PTC chip surface; one surface of the first limiting block is in the same parallel surface with the surface of the PTC chip, the limiting block is in surface contact with the PTC chip, the contact area is increased, the parallelism of the PTC chip can be better guaranteed, and the PTC chip can be better clamped.
The distance between the surface of the blocking rib and the surface of the PTC chip is 0.3mm-0.5 mm; the distance between the surface of the blocking rib and the surface of the PTC chip is 0.3mm-0.5mm, and the PTC chip fragments have enough free inclination after being broken, so that the complete surface contact between the surface of the PTC chip fragments and the surface of the blocking rib is ensured, and the fixing acting force is increased on the PTC chip fragments.
Claims (2)
1. The utility model provides a PTC starter, but two electrode plates of elasticity centre gripping article stagger the both ends centre gripping electricity connection that set up in PTC chip (1) both sides, the dislocation of electric insulation fire-retardant first stopper (4) is supported tightly in one side of PTC chip (1) relative first electrode plate (2), the electric insulation fire-retardant second stopper (5) is supported tightly in one side of PTC chip (1) relative second electrode plate (3) in the middle part, characterized in that, first electrode plate (2) are located between first stopper (4) and second stopper (5), the electric insulation fire-retardant fender muscle (6) is set up in one side of PTC chip (1) relative second stopper (5), fender muscle (6) have the clearance with PTC chip (1), should keep off muscle (6) still be located between second stopper (5) and second electrode plate (3);
The top end of the blocking rib (6) and the second electrode plate (3) have a horizontal height difference value (alpha);
the level difference (alpha) is 1.1mm-1.3mm;
the top end of the blocking rib (6) is an inclined surface (7), and the inclined surface is directed to one side back to the middle part of the PTC chip from the top end of the blocking rib;
The distance between the first limiting block (4) which is electrically insulated and flame-retardant and the first electrode plate (2) which is in a stress-free state is smaller than the thickness of the PTC chip (1); the distance between the second limiting block (5) which is electrically insulated and flame-retardant and the second electrode plate (3) which is in a stress-free state is larger than the thickness of the PTC chip (1);
the first limiting block (4) is a cylinder with one face in a right triangle shape, and one plane is in contact and tightly abuts against the surface of the PTC chip (1).
2. A PTC starter according to claim 1, characterized in that the ribs (6) have a surface distance of 0.3mm-0.5mm from the surface of the PTC chip (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078635.6A CN109546893B (en) | 2019-01-28 | 2019-01-28 | PTC starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078635.6A CN109546893B (en) | 2019-01-28 | 2019-01-28 | PTC starter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109546893A CN109546893A (en) | 2019-03-29 |
| CN109546893B true CN109546893B (en) | 2024-06-28 |
Family
ID=65838756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910078635.6A Active CN109546893B (en) | 2019-01-28 | 2019-01-28 | PTC starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109546893B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206023186U (en) * | 2016-09-23 | 2017-03-15 | 广州森宝电器股份有限公司 | A kind of anti-short-circuit structure of PTC starters |
| CN206023624U (en) * | 2016-09-23 | 2017-03-15 | 广州森宝电器股份有限公司 | A kind of PTC starter fire proof construction |
| CN209217977U (en) * | 2019-01-28 | 2019-08-06 | 广州森宝电器股份有限公司 | A kind of PTC starter |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2611512B2 (en) * | 1990-07-19 | 1997-05-21 | 株式会社村田製作所 | Overcurrent protection components |
| KR100231796B1 (en) * | 1995-11-07 | 1999-12-01 | 무라타 야스타카 | Electronic devices reduced destruction of internl elements upon malfunction |
| JPH10149906A (en) * | 1996-09-20 | 1998-06-02 | Tdk Corp | Ptc element retaining structure |
| JP2001128416A (en) * | 1999-10-27 | 2001-05-11 | Matsushita Refrig Co Ltd | Starter of motor |
| CN2805214Y (en) * | 2005-05-17 | 2006-08-09 | 常熟市天银机电有限公司 | Starter for electric motor of compressor |
| CN202150820U (en) * | 2011-05-23 | 2012-02-22 | 刘惠玲 | Energy-saving ptc starter |
| CN202335131U (en) * | 2011-11-14 | 2012-07-11 | 何敦启 | Positive temperature coefficient (PTC) sheet skewed-type clamping structure for refrigerator starter |
| CN108667350B (en) * | 2018-07-11 | 2024-07-19 | 广州森宝电器股份有限公司 | Starter with protection function |
-
2019
- 2019-01-28 CN CN201910078635.6A patent/CN109546893B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206023186U (en) * | 2016-09-23 | 2017-03-15 | 广州森宝电器股份有限公司 | A kind of anti-short-circuit structure of PTC starters |
| CN206023624U (en) * | 2016-09-23 | 2017-03-15 | 广州森宝电器股份有限公司 | A kind of PTC starter fire proof construction |
| CN209217977U (en) * | 2019-01-28 | 2019-08-06 | 广州森宝电器股份有限公司 | A kind of PTC starter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109546893A (en) | 2019-03-29 |
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