CN209217977U

CN209217977U - A kind of PTC starter

Info

Publication number: CN209217977U
Application number: CN201920140954.0U
Authority: CN
Inventors: 施庆生; 骆焰鹏; 陆宇铖; 陈峻锴
Original assignee: Guangzhou Senbao Electrical Appliances Co Ltd
Current assignee: Guangzhou Senbao Electrical Appliances Co Ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2019-08-06
Anticipated expiration: 2029-01-28

Abstract

The utility model discloses a kind of PTC starter, including can resilient clamp object two electrode plates be arranged in a staggered manner PTC chip two sides both ends clamping electrical connection, the the first limited block dislocation for being electrically insulated fire-retardant is pushed against the side of PTC chip opposite first pole plate, the the second fire-retardant limited block that is electrically insulated is pushed against side of the middle part with respect to second electrode plate of PTC chip, first electrode plate is between the first limited block and the second limited block, the side of PTC chip is arranged in respect to the second limited block for the fire-retardant block reinforcement that is electrically insulated, the block reinforcement and PTC chip have gap, the block reinforcement is also located between the second limited block and second electrode plate.The structure prevents fragmentation chip from tilting toward side by block reinforcement, which can also block the block chip sliver, and the block chip sliver and another chip piece sliver or second electrode plate are obstructed, chip sliver is prevented to be connected to first electrode plate and second electrode plate again.

Description

A kind of PTC starter

Technical field

The utility model relates to a kind of compressor starter, specifically a kind of PTC starter.

Background technique

PTC chip is a kind of incorporation trace rare-earth element, the barium titanate-type semiconductor of ceramic process processing has positive temperature Spend the thermistor of characteristic.It is at normal temperature in Low ESR, concatenation is in circuit channel status, when making element itself by electric current After fever, impedance is steeply risen, and is in high-impedance state.Usually PTC starter is connected in the auxiliary winding circuit of access compressor, is compressed Machine flows through starting winding electric current when starting increases PTC element temperature rapidly, flows through the electric current of PTC chip because of PTC chip Temperature increase and reduce, and compressor just enters normal operation at this time.

The PTC chip of existing PTC starter is typically mounted at the inner space of box body, and electrode plate is mounted on PTC chip Opposite sides connect with external terminal.As shown in Figure 1, this kind of structure occurs there is the side of pushing open when failure is split in PTC chip To uncertainty, the electrode plate positioned at PTC chip two sides is easy PTC chip nubbin to continue stable clamp；Or Electrode plate can not clamp one end of PTC chip, and PTC chip nubbin, which is again positioned between two electrode plates to play connection and be powered, to be made With, and the PTC chip at this moment to fail is that do not have positive temperature characterisitic, electric current will continue to by PTC chip nubbin, the knot Structure is equivalent to short circuit, will lead to high temperature generation on fire.

Utility model content

The utility model, which provides one kind, can prevent PTC chip from contacting in the state of fragmentation with two electrode plates, prevent two electricity Pole plate is in contact the PTC starter of conducting.

PTC starter described in the utility model, including can two electrode plates of resilient clamp object be arranged in a staggered manner in PTC core The both ends of piece two sides clamp electrical connection, and the first limited block dislocation for being electrically insulated fire-retardant is pushed against PTC chip opposite first pole plate Side, the second fire-retardant limited block that is electrically insulated is pushed against side of the middle part with respect to second electrode plate of PTC chip, first electrode Between the first limited block and the second limited block, the fire-retardant block reinforcement that is electrically insulated is arranged with respect to the second limited block in PTC chip plate Side, the block reinforcement and PTC chip have gap, which is also located between the second limited block and second electrode plate.

PTC starter described in the utility model, first electrode plate clamping PTC chip two sides opposite with the first limited block Both ends, second electrode plate and the setting of the second limited block relative misalignment push against PTC chip, pass through two electrode plates and two limited blocks of being staggered To the stress point of PTC chip, so that force dispersion, is conducive to preferably clamp PTC chip；By in the second limited block and second Block reinforcement is set between electrode plate, fragmentation chip is prevented to tilt toward second electrode plate side, avoid again with second electrode plate end Contact；There is gap to cut between block reinforcement and PTC chip with certain free inclination degree when first electrode plate squeezes fragmentation chip Shear force dispersion, facilitates gripping by the sliver of chip；The block reinforcement of the structure can also cooperate with the second limited block, due to first electrode plate With the clamping force of the first limited block, it can force and be clamped in first electrode plate and the chip sliver of the first limited block inclines to block reinforcement direction Tiltedly, block reinforcement can obstruct the block chip sliver in the side of first electrode plate, and the block chip sliver is prevented to fall and second electrode Plate is in contact conducting again, effectively prevent that high temperature hidden danger on fire occurs because of short circuit.

Detailed description of the invention

Fig. 1 is a kind of existing PTC starter structural schematic diagram.

Fig. 2 is a kind of structural schematic diagram of PTC starter.

Fig. 3 is a kind of one schematic diagram of PTC chip failure state of PTC starter.

Fig. 4 is a kind of two schematic diagram of PTC chip failure state of PTC starter.

Fig. 5 is a kind of line A-A cross-sectional view of PTC starter in Fig. 2.

Fig. 6 is a kind of line B-B cross-sectional view of PTC starter in Fig. 2.

Specific embodiment

As shown in Fig. 2, a kind of PTC starter, including can two electrode plates of resilient clamp object be arranged in a staggered manner in PTC chip (1) both ends of two sides clamp electrical connection, and the first limited block (4) dislocation for being electrically insulated fire-retardant is pushed against PTC chip (1) opposite first The side of electrode plate (2), the second limited block (5) for being electrically insulated fire-retardant are pushed against the middle part of PTC chip (1) with respect to second electrode plate (3) side, first electrode plate (2) is between the first limited block (4) and the second limited block (5), and be electrically insulated fire-retardant block reinforcement (6) opposite second limited block (5) setting is in the side of PTC chip (1), and there are gap in the block reinforcement (6) and PTC chip (1), the gear Muscle (6) is also located between the second limited block (5) and second electrode plate (3).What two electrode plates were staggered is arranged in PTC chip two sides Both ends, two limited blocks being arranged in a staggered manner of cooperation are pushed against the two sides of PTC chip, because two electrode plates are to the abutting position of PTC chip It sets with two limited blocks to the abutting position of PTC chip not in same straight line, therefore there are shearing forces, clamp PTC chip with this, When PTC chip is split, since chip sliver is pushed in the elastic deformation of electrode plate open toward opposite direction；Due to being split after chip failure Piece, which exists to push open, causes apart from excessive first electrode plate and the first limited block to loosen the clamping of PTC chip, by the second limit Block reinforcement is set between position block and second electrode plate, fragmentation chip is prevented to tilt toward second electrode plate side, is avoided again with second The contact of electrode plate end；There is gap between block reinforcement and PTC chip, with certain freedom when first electrode plate squeezes fragmentation chip Gradient, shearing force dispersion, facilitates gripping by the sliver of chip；The block reinforcement of the structure can also cooperate with the second limited block, due to The clamping force of first electrode plate and the first limited block, can force be clamped in the chip sliver of first electrode plate and the first limited block to The inclination of block reinforcement direction, block reinforcement can obstruct the block chip sliver in the side of first electrode plate, and the block chip sliver is prevented to fall It is in contact conducting again with second electrode plate.

As shown in figure 3, PTC chip fracture location is when block reinforcement is close to limited block side, due to first electrode plate and first Limited block is not to the abutting position of PTC chip in same position, and there are shearing force, one of chip sliver is clamped, should One end that block chip sliver is not clamped is tilted toward block reinforcement direction, even if the block chip is not by first electrode plate and the first limited block It clamps, can also be blocked the block chip sliver by block reinforcement, by the block chip sliver and another chip piece sliver or second Electrode plate barrier, prevents chip sliver to be connected to first electrode plate and second electrode plate again.

As shown in figure 4, PTC chip fracture location is when block reinforcement is close to second electrode plate side, due to first electrode plate and First limited block to the abutting position of PTC chip not in same position, between there are shearing forces, and block reinforcement and chip surface have One of chip sliver that gap, first electrode plate and the first limited block clamp is tilted toward block reinforcement direction, and block reinforcement can clamp The chip sliver, prevents from being in contact with second electrode plate and is connected to.

As shown in figure 5, the PTC starter, there is horizontal height in the top and second electrode plate (3) of the block reinforcement (6) It spends difference (α)；

The level height difference (α) is 1.1mm-1.3mm；There are difference in level, PTC between block reinforcement and second electrode plate After chip cracks, the reply of second electrode plate stress deformation will not be interfered with block reinforcement, prevented second electrode board from living block reinforcement, led Second electrode plate and PTC fragment is caused to be in contact turning circuit again.

The PTC starter, block reinforcement (6) top are inclined surface (7), and inclined surface is to be directed toward back by the top of block reinforcement Side in the middle part of to PTC chip；By the way that inclined surface is arranged on block reinforcement top, enough fixations can be provided to PTC chip fragment Active force.

The PTC starter, the first limited block (4) for being electrically insulated fire-retardant and the first electrode plate (2) without stress Spacing be less than PTC chip (1) thickness；The second limited block (5) and the second electrode plate without stress for being electrically insulated fire-retardant (3) spacing is greater than the thickness of PTC chip (1)；After assembling PTC chip, first electrode plate and second electrode plate stress deformation Clamp PTC chip, PTC chip fails after fragmentation, due to first electrode plate without stress original state when with the first limited block Spacing is less than the thickness of PTC chip, and first electrode plate is replied original state toward the first limit Block direction, can be clamped positioned at first The PTC chip fragment of electrode plate and the first limited block；Due to the spacing of the second limited block and the second electrode plate without stress Greater than the thickness of PTC chip (1), PTC chip fails after fragmentation, broken positioned at second electrode plate and the PTC chip of the second limited block Block can not be clamped and fall, and effectively prevent PTC chip fragment that first electrode plate and second electrode plate are connected again.

As shown in fig. 6, the PTC starter, first limited block is the cylinder of the rectangular triangle of one side, wherein One plane and PTC chip face contact push against；The surface of the one side of first limited block and PTC chip is in same parallel surface, the limit Position block and PTC chip face contact increase contact area, can preferably guarantee the depth of parallelism of PTC chip, preferably clamp PTC Chip.

The PTC starter, the block reinforcement surface distance PTC chip surface are 0.3mm- 0.5mm；Block reinforcement surface with PTC chip surface distance be effective distance between 0.3mm-0.5mm, have enough free inclinations after PTC chip sliver fragmentation Degree guarantees PTC chip sliver surface and the complete face contact in block reinforcement surface, increases fixed function power to PTC chip fragment.

Claims

1. a kind of PTC starter, including can two electrode plates of resilient clamp object be arranged in a staggered manner the two of PTC chip (1) two sides End clamping electrical connection, the first limited block (4) dislocation for being electrically insulated fire-retardant are pushed against PTC chip (1) opposite first pole plate (2) Side, the second limited block (5) for being electrically insulated fire-retardant are pushed against side of the middle part with respect to second electrode plate (3) of PTC chip (1), It is characterized in that, first electrode plate (2), between the first limited block (4) and the second limited block (5), be electrically insulated fire-retardant block reinforcement (6) opposite second limited block (5) setting is in the side of PTC chip (1), and there are gap in the block reinforcement (6) and PTC chip (1), the gear Muscle (6) is also located between the second limited block (5) and second electrode plate (3).

2. a kind of PTC starter according to claim 1, which is characterized in that the top of the block reinforcement (6) and second electrode There are level height difference (α) for plate (3).

3. a kind of PTC starter according to claim 2, which is characterized in that the level height difference (α) is 1.1mm- 1.3mm。

4. a kind of PTC starter according to claim 1, which is characterized in that block reinforcement (6) top is inclined surface (7), Inclined surface is the side being directed toward in the middle part of PTC chip by the top of block reinforcement.

5. a kind of PTC starter according to claim 1, which is characterized in that the first limited block (4) for being electrically insulated fire-retardant with The spacing of the first electrode plate (2) of no stress is less than the thickness of PTC chip (1)；The second limited block (5) for being electrically insulated fire-retardant It is greater than the thickness of PTC chip (1) with the spacing of the second electrode plate (3) of no stress.

6. a kind of PTC starter according to claim 1, which is characterized in that first limited block (4) is one side in straight The cylinder of angle triangle, one of plane and PTC chip (1) face contact push against.

7. a kind of PTC starter according to claim 1, which is characterized in that block reinforcement (6) the surface distance PTC chip (1) surface is 0.3mm-0.5mm.