CN2606490Y

CN2606490Y - Motor starting protector

Info

Publication number: CN2606490Y
Application number: CN 03219606
Authority: CN
Inventors: 赵云文
Original assignee: TIANYIN ELECTROMECHANICAL CO Ltd CHANGSHU
Current assignee: TIANYIN ELECTROMECHANICAL CO Ltd CHANGSHU
Priority date: 2003-01-24
Filing date: 2003-01-24
Publication date: 2004-03-10
Anticipated expiration: 2013-01-24

Abstract

The utility model provides a motor starting protector of starting and protecting function for the cold compressor, comprising a casing 15 and a cover 3, wherein, one end of the casing 15 is provided with a slot 14 for a ground insert plate, the other end of the casing 15 is provided with a slot 23 for an N insert plate, the right corner of the casing 15 is provided with a slot 21 for an L insert plate , the middle part of the casing 15is formed as a holding cavity 29, the center of which is depressed to form a slot 19 for a thermistor of positive temperature coefficient, in addition, a hole 35 for a left insert plate goes through the bottom wall of the casing 15 at a point where the left wall 20 is perpendicular to the bottom of the bottom of the holding cavity, while a hole 17 for a right inset plate is arranged on a right wall in the same way; an extension of the middle part of the outer side of the casing 15 is provided with a support seat 34 for the protector which is provided with a slot 30 for insert legs of the support and a hole 25 for a single insert leg. The utility model avoids the short circuit of electricity, along with convenient assembly and compact structure.

Description

Electric motor starting, protector

Technical field

The utility model discloses a kind of electric motor starting, protector, especially a kind of electric motor starting, protector that is specially adapted to the motor of refrigerant compressor is played starting and protective effect.

Background technology

Known, in the start-up circuit of refrigeration compressor motor, be in series with starter, it is to utilize the positive temperature coefficient thermistor of protector to be in little resistance conducting state at normal temperatures, and when compressor electric motor energising starting, electric current is connected the starting circuit of compressor through positive temperature coefficient thermistor and the inserted sheet corresponding with positive temperature coefficient thermistor, make the electronic starting of refrigerant compressor, simultaneously, in the moment of the electric motor starting of compressor, the electric current of positive temperature coefficient thermistor of flowing through makes positive temperature coefficient thermistor generate heat rapidly rapidly, thereby make positive temperature coefficient thermistor reach the high value state in a short period of time, cut off the starting circuit of compressor electric motor, make compressor electric motor enter normal operation; The function that is connected on the protector in the main circuit of compressor electric motor is when on the low side or refrigerating system breaks down when supply voltage, to be cut off the electricity supply the protection compressor electric motor by it.And the motor starter of existing refrigerant compressor and motor protecter are split type, starter is located on the three-way binding post of compressor, protector then is installed in the plastic junction box, their electric connections are between the two still needed and are realized by terminal box, therefore, in the time of on having finished the junction box seat that the terminal box after starter, the electric connection of protector is inserted on the compressor housing, be arranged in plastic junction box protector binding post very easily with terminal box on binding post collide, have the anxiety cause electric short circuit; Also have just because of starter, protector are split type, therefore, both brought the inconvenience of installing, cause structural laxity again.

Summary of the invention

The purpose of this utility model be to provide a kind of can stop the electric short circuit phenomenon, easy for installation, the electric motor starting of compact conformation, protector.

The purpose of this utility model reaches like this, a kind of electric motor starting, protector, comprise that a shell 15 and a lid place the lid 3 on the shell 15, one of described shell 15 end tool grounding insert-pin groove 14, the tool N of the left comer place inserted slot 23 of other end, the tool L of right corner place inserted slot 21, keep left among the shell 15,

right wall

20,16 protuberance and be formed with a cavity volume 29, the centre downwards and then be recessed to form a positive temperature coefficient thermistor groove 19 among the cavity volume 29, and, left side wall 20 is being formed with a pair of left inserting-plate hole 35 that runs through shell 15 diapires with perpendicular position, cavity volume 29 bottoms, and right wall 16 equally also is formed with a right inserting-plate hole 17; Nearly middle part, a wherein outside of shell 15 extends a protector rack seat 34, tool support pin groove 30 and single pin holes 25.

The utility model electric motor starting, protector, because of shell has been done reasonable improvement, motor starter and motor protecter are able to establishing on it, the terminal box that the nothing song is equipped with by other is again carried out electric connection with them, therefore brought convenience to installation, and structure becomes compacter; Comparatively reasonable because of being positioned at arranging of all inserted slots on the shell, inserting-plate hole, pin holes, cavity volume etc., therefore parts such as all inserted sheets, pin and positive temperature coefficient thermistor can reasonably place on the shell, and protector and starter being electrically connected between the two not only makes things convenient for, but also reliable; With starter and protector structure is when being concatenated into after the one in the circuit of compressor electric motor, the phenomenon of electric short circuit can not occur causing.

Description of drawings

Fig. 1 is an element exploded perspective view of the present utility model.

Fig. 2 is the stereogram of bottom view of the utility model figure l.

Embodiment

Please refer to Fig. 1 and Fig. 2, starter of the present utility model as can be known comprises a left side, right pin 11,68 and both sides respectively by a spring leaf 10 and a left side, right pin 11,6 contacted positive temperature coefficient thermistors 9, a left side, right pin 11,6 are posted solid in the left side of cavity volume 29 respectively, right wall 20, on 16, and, described left wall 20 and the formed a pair of left inserting-plate hole 35 that runs through shell 15 bottoms in perpendicular position, cavity volume 29 bottoms are aimed at and passed through to a pair of left inserted sheet of pin ll bottom, a left side, described right inserting-plate hole 17 is aimed at and passed through to a right inserted sheet 8 of right pin 6 bottoms, positive temperature coefficient thermistor 9 hangs down in the positive temperature coefficient thermistor groove l9 of the centre that is located at cavity volume 29, and each fixing a pair of shape of its both sides is The metal spring leaf lO of shape, the top of a pair of spring leaf 10 respectively with left and right pin 11,6 solid weldings mutually, and each spring leaf pin 7 and positive temperature coefficient thermistor 9 solid weldings.

The grounding insert-pin 13 that is used to connect power supply is inserted in the grounding insert-pin groove 14, and the diapire of shell 15 was passed through in bottom of three pin heads on it, be inserted in N inserted slot 23 and L inserted slot 2l respectively with left inserted sheet 12 contacted N inserted sheets 24 and L inserted sheet 22, and the diapire of starter shell 15 was all passed through in the bottom of their pin head.

All resolution elements of starter are as above described; after being placed on the shell 15; with lid 3 lids and on shell 15; and make three jacks 2 on the lid 3 aim at single pin 28 of left and right pin 11,6 and protector respectively; two ends by stator 5 are placed in the stator groove 4 of lid 3 and the stator groove 18 on two shells 15 respectively at last, take this lid 3 and starter shell 15 are coupled as one.

As shown in Figure 1; single pin 28 of the present utility model is inserted single pin holes 25; and protector body l is placed on the protector rack 26; extended a support pin 27 on the protector rack 26; tool compresses reed 32 on it; be inserted in support pin groove 30 and by compressing reed 32 effects by support pin 27; and make protector body l realize being fixedly arranged on the shell l5 together with protector rack 26; and one of them that makes protector body l bottom is inserted on single pin 28 through lead wire 36 and by the sleeve 31 of lead wire 36 top ends by splicing ear 33; protector body 1 is installed on the shell 15 constitutes integral type, another binding post 33 of protector body 1 bottom is for the usefulness that is connected in series with the compressor electric motor main circuit.

Knowing that by Fig. 1, Fig. 2 are apparent shell 15 is integral productions with protector rack seat 34, specifically is to adopt the integrally moulded shapings of plastics.

Be connected in the starting circuit of compressor electric motor by right pin 6, positive temperature coefficient thermistor 9 is in the conducting state of little resistance at normal temperatures, when compressor electric motor starts, electric current is by positive temperature coefficient thermistor 9, right pin 6, connect the compressor electric motor starting circuit, the starting of help compressor electric motor, while is in the moment of compressor start, because of flowing through positive temperature coefficient thermistor 9, electric current makes its rapid heating, and can make positive temperature coefficient thermistor 9 reach its high value state in a short period of time, thereby cut off the starting circuit of compressor electric motor, make compressor electric motor enter normal operating conditions.Because of N inserted sheet 24 is realized electric the contact with left inserted sheet 12, therefore as long as the three-way binding post that makes the power supply neutral line be connected to compressor electric motor by left inserted sheet 12 just constitutes the conducting loop, L inserted sheet 22 and grounding insert-pin 13 then provide power of compressor to insert and ground protection respectively; And insert the three-way binding post of compressor when protector after; single pin 28 of protector and the right pin 6 of starter, left pin 11 insert the three-way terminals of compressor respectively; realize protector body 1 is connected in the main circuit of compressor electric motor by single pin 28; when on the low side or refrigerating system breaks down when current/voltage; cut off the electricity supply, play the effect of protection compressor electric motor.

Claims

1, a kind of electric motor starting, protector, comprise that a shell (15) He Yigai places the lid (3) on the shell (15), it is characterized in that one of described shell (15) end tool grounding insert-pin groove (14), the tool N of the left comer place inserted slot (23) of other end, the tool L of right corner place inserted slot (21), shell keeps left among (15), right wall (20), (16) protuberance and be formed with a cavity volume (29), the centre downwards and then be recessed to form a positive temperature coefficient thermistor groove (19) among the cavity volume (29), and, left side wall (20) is being formed with a pair of left inserting-plate hole (35) that runs through shell (15) diapire with perpendicular position, cavity volume (29) bottom, and right wall (16) equally also is formed with a right inserting-plate hole (17); Nearly middle part, a wherein outside of shell (15) extends a protector rack seat (34), tool support pin groove (30) and single pin holes (25).