CN113453474A - Integrated multi-terminal motor starting protector - Google Patents

Abstract

An integrated multi-terminal motor starting protector comprises a shell, wherein the shell is provided with a starter accommodating cavity, a first pin accommodating cavity and a second pin accommodating cavity, a positive temperature coefficient thermistor left supporting flange and a positive temperature coefficient thermistor right supporting flange are arranged in the starter accommodating cavity, the first pin accommodating cavity and the second pin accommodating cavity are respectively formed by surrounding of the pin accommodating cavity, and a shell first jack and a shell second jack are arranged on the shell; the shell cover is matched with the position of the shell opening on the side, facing downwards, of the shell; the starter, the protector and the external terminal connecting mechanism are characterized in that a protector inserting and embedding seat extends leftwards on a left wall body of a shell, the front end of the protector inserting and embedding seat extends out of the front side face of the shell, the rear end of the protector inserting and embedding seat extends out of the rear side face of the shell, the protector inserting and embedding seat is provided with a protector inserting and embedding cavity, one upward side of the protector inserting and embedding cavity forms an opening of the protector inserting and embedding cavity, one downward side of the protector inserting and embedding cavity is provided with a position-giving opening, and the protector is embedded and matched with the protector inserting and embedding cavity. The requirements of miniaturization of volume, modularization of structure, rapidness of assembly, convenience of inspection and maintenance and replacement, economy and cheapness are met.

Description

Integrated multi-terminal motor starting protector

Technical Field

The invention belongs to the technical field of refrigeration compressors, and particularly relates to an integrated multi-terminal motor starting protector which is used for starting and protecting a refrigeration compressor motor.

Background

The starting protector is a general name of the starter and the protector. Since the motor of the conventional refrigeration compressor is a low-power single-phase ac motor, a starter is required to assist the starting at the time of starting, and an overload protector (i.e., the aforementioned "protector") is required to perform protection after the compressor enters a normal operation state. In particular, the overload protector ensures that the power supply is cut off when the overload situation occurs in the running process of the refrigeration compressor, so that the compressor is prevented from overheating and causing damage.

Earlier, the starter and the protector were generally designed as separate split structures and each connected in a separate electrical assembly in the electrical circuit of the refrigerant compressor. For example, three sockets are formed in the starter, and are plugged into a compressor standard interface (conventionally referred to as a "three-wire post") of the refrigeration compressor, which is formed by three conductive rods (also referred to as "conductor rods"), and the protector is packaged in an independent state in a separately configured box body such as a bakelite box, and is connected to an electrical circuit of the refrigeration compressor through a transition junction box or a terminal block on the starter. Since the electrical connection is performed manually, it is easy to make mistakes, it is difficult to ensure the quality of the electrical connection and to improve the assembly efficiency of the product, and the electrical reliability of the system is affected by too many connectors.

From the above description, it can be determined without doubt that: combining the starter and the protector has a good positive significance, and is not disclosed in the published chinese patent documents, such as CN2606490Y (motor start, protector), CN2606491Y (integrated motor start, protector), CN2664280Y (motor starter with improved structure), CN100581043C (energy-saving integrated single-phase ac motor start, protector), CN102386815A (integrated motor start protector with improved structure), CN101369790A (energy-saving integrated single-phase ac motor start, protector), CN206211857U (refrigeration compressor start protector without power consumption), CN106385204A (refrigeration compressor start protector without power consumption) and CN104734570A (start protector without power consumption energy-saving single-phase ac motor start), to name a few.

As is known in the art, as various electronic and electrical components are miniaturized, modularized, and convenient to install and/or maintain, the motor start protector is also developed. However, since the shape of the protector disclosed in the above-mentioned patent is not limited to a cylindrical shape, it is necessary to extend a cylindrical protector seat on the outer wall of the rectangular housing at a position located at one corner of the outer wall of the housing, and insert the protector into the protector seat (see, specifically, CN104734570A mentioned above), which, on one hand, limits the idea of the protector that tends to be flat, on the other hand, is not enough to ensure the miniaturization of the volume of the whole housing (for designing the starter and the housing of the protector) and to meet the desired strength requirement, and on the other hand, makes the shape of the whole housing mismatched, which results in that the mold for manufacturing the plastic housing becomes complicated and increases the mold cost, which, on the other hand, is not conducive to efficient and automatic assembly in the production process.

Chinese patent CN101320661B recommends "overload protector with explosion-proof structure", which realizes the design of the protector to be flat and can block the arc that may be generated when the moving contact is disconnected from the meter contact, so as to avoid leakage to the outside and even initiate the explosion of combustible gas or steam. However, this patent does not give any technical teaching of the integration with the starter, and therefore it is necessary to make a rational design, and the technical solutions described below are made in this context.

Disclosure of Invention

The invention aims to provide an integrated multi-terminal motor starting protector which is beneficial to meeting the requirements of miniaturization of volume, modularization of structure, rapidness of assembly, convenience of inspection and maintenance and replacement and economy and low cost.

The object of the present invention is achieved by an integrated multi-terminal motor starting protector, comprising a housing having a starter accommodating chamber, a first pin accommodating chamber i and a second pin accommodating chamber ii, a positive temperature coefficient thermistor left supporting flange and a positive temperature coefficient thermistor right supporting flange corresponding to each other are formed in the starter accommodating chamber and in the middle of the starter accommodating chamber, protruding from the surface of the chamber bottom wall of the starter accommodating chamber, the first pin accommodating chamber i and the second pin accommodating chamber ii are each surrounded by pin accommodating chamber ledges at positions corresponding to the left side of the starter accommodating chamber, a housing first insertion hole i is formed in the housing and at a position corresponding to the first pin accommodating chamber i, the housing first insertion hole i communicates the first pin accommodating chamber i with the outside, a second plug hole II of the shell is formed in the position, corresponding to the second plug pin accommodating cavity II, of the shell, and the second plug pin accommodating cavity II is communicated with the outside through the second plug hole II of the shell; the shell cover is matched with the part of the shell opening on the side, facing downwards, of the shell; a starter, a protector and an external terminal mechanism, the starter is arranged in the starter containing cavity under the state of being supported between the left supporting flange of the positive temperature coefficient thermistor and the right supporting flange of the positive temperature coefficient thermistor and is respectively inserted and matched with the first jack I and the second jack II of the shell at the positions corresponding to the first jack I and the second jack II of the shell, the external terminal mechanism is inserted and matched with the shell cover at the position corresponding to the lower part of the shell cover and is upwards inserted into the starter containing cavity through the shell cover to be electrically connected with the starter, the external terminal mechanism is characterized in that a protector inserting embedding seat extends leftwards on the left wall body of the shell, the front end of the protector inserting seat extends out of the front side surface of the shell, and the rear end of the protector inserting seat extends out of the rear side surface of the shell, the protector inserting and embedding seat is provided with a protector inserting and embedding cavity, one upward side of the protector inserting and embedding cavity forms an opening of the protector inserting and embedding cavity, one downward side of the protector inserting and embedding cavity forms a yielding opening, the shape of the protector inserting and embedding cavity is semicircular, and the shape of the protector is matched with the shape of the protector inserting and embedding cavity and is matched with the protector inserting and embedding cavity in an inserting and embedding mode.

In a specific embodiment of the invention, a first electric inserting sheet limiting stop pin I, a second electric inserting sheet limiting stop pin II and a positive temperature coefficient thermistor probing limiting cavity are formed on one side of the shell cover facing to the starter accommodating cavity of the shell, the first electric inserting sheet limiting stop pin I and the second electric inserting sheet limiting stop pin II correspond to each other, and the positive temperature coefficient thermistor probing limiting cavity is positioned between the first electric inserting sheet limiting stop pin I and the second electric inserting sheet limiting stop pin II; the starter comprises a positive temperature coefficient thermistor, a first electric inserting piece I and a second electric inserting piece II, wherein the positive temperature coefficient thermistor is arranged in a longitudinal state, the upper part of the positive temperature coefficient thermistor is supported between a left supporting flange of the positive temperature coefficient thermistor and a right supporting flange of the positive temperature coefficient thermistor, the lower part of the positive temperature coefficient thermistor stretches into a limited cavity, the front side of the first electric inserting piece I is electrically contacted with the rear side of the positive temperature coefficient thermistor, the rear side of the first electric inserting piece I is limited by the first electric inserting piece limiting blocking pin I, the first electric inserting piece I is provided with a first electric inserting piece pin I and an electric connecting pin, the first electric inserting piece pin I stretches into the first pin containing cavity I and corresponds to the first inserting hole I of the shell, the electric connecting pin is inserted into the shell cover and extends to the lower part of the shell cover, the rear side of a second electric inserting piece II is in electrical contact with the front side of the positive temperature coefficient thermistor, the front side of the second electric inserting piece II is limited by a second electric inserting piece limiting blocking pin II, the second electric inserting piece II is provided with a second electric inserting piece pin II and an external terminal electric connecting inserting piece pin, the second electric inserting piece pin II extends into the second pin accommodating cavity II and corresponds to a second inserting hole II of the shell, and the external terminal mechanism extends into the starter accommodating cavity and is electrically connected with the external terminal electric connecting inserting piece pin; the first jack I of shell and the second jack II of shell are connected with the three-wire column electrical connection of compressor with plug mode under the user state.

In another specific embodiment of the present invention, the protector includes a shield, a shield cover, an insert spring, an electric heating wire, a bimetal, a first electrical connector i, a second electrical connector ii, a stationary contact pin, a movable contact piece, and a protector pin, a stationary contact pin insert flange cavity, an insert spring positioning cavity, an insert spring pin support cavity, an electric heating wire cavity, and an electrical connector positioning cavity are formed on the right side of the shield, the stationary contact pin insert flange cavity is located above the rear portion of the right side of the shield and a pair of stationary contact pin positioning flange insert grooves are formed on a cavity bottom wall of the stationary contact pin insert flange cavity in correspondence with each other, the pair of stationary contact pin positioning flange insert grooves penetrate through a cavity bottom wall of the stationary contact pin insert flange cavity to communicate with the outside, the insert spring positioning cavity corresponds to a lower portion of the stationary contact pin insert flange cavity and a insert spring positioning insert groove is formed on a cavity bottom wall of the insert spring positioning cavity, the insert positioning insert pin penetrates through a cavity bottom wall of the insert spring insert groove to communicate with the outside, the spring pin supporting cavity is formed at the edge part of the rear lower part of the right side of the protective cover at the position corresponding to the spring positioning cavity and is communicated with the spring positioning cavity, the electric heating wire cavity is formed at the center position of the right side of the protective cover, the electric connecting piece positioning cavity is positioned in front of the right side of the protective cover, an electric connecting piece positioning embedded foot groove penetrating through the cavity bottom wall of the electric connecting piece positioning cavity is formed on the cavity bottom wall of the electric connecting piece positioning cavity, the base part of the inserting spring is positioned in the spring positioning cavity and is bent at the base part of the inserting spring to form an inserting spring positioning embedded foot, the inserting spring positioning embedded foot is embedded and fixed with the inserting spring positioning embedded foot inserting groove, an inserting spring used for being connected with an electric circuit in series extends from one side of the inserting spring facing to the spring pin supporting cavity, the inserting spring foot is tightly attached to and supported on the spring pin supporting cavity and extends out of the lower surface of the protective cover, an electric heating wire inserting spring electric connecting lug extends from the front side surface of the base part of the inserting spring, the electric heating wire inserting spring electric connecting lug extends into the electric heating wire cavity, the electric heating wire is embedded in the electric heating wire cavity in a C-shaped state, a first connecting end I of the electric heating wire is connected with the electric heating wire inserting spring electric connecting lug, a second connecting end II of the electric heating wire is connected with a first electric connecting piece I, a bimetallic strip covers the right side of the electric heating wire, the first electric connecting piece I is arranged in the electric connecting piece positioning cavity, an electric connecting piece limiting strip extends from the lower part of the first electric connecting piece I, the second connecting end II of the electric heating wire is connected with the electric connecting piece limiting strip, an electric connecting piece positioning embedded foot extends from the electric connecting piece limiting strip and corresponds to the electric connecting piece positioning embedded foot groove, the electric connecting piece positioning embedded foot is embedded in the electric connecting piece positioning embedded foot groove, and the second electric connecting piece II is welded and fixed with the first electric connecting piece I, the static contact pin is arranged in the static contact pin inserting flange cavity, a pair of static contact pin inserting flanges are formed on the static contact pin and correspond to the pair of static contact pin positioning flange inserting grooves, the pair of static contact pin inserting flanges and the pair of static contact pin positioning flange inserting grooves are fixedly inserted and embedded, a static contact is fixed on the static contact pin, one end of the static contact pin, facing the protective cover, penetrates through the protective cover to form a static contact pin electric connecting end, one end of the movable contact piece and the second electric connecting piece II form an integral structure, the middle part of the movable contact piece is attached to the right side of the bimetallic strip, the other end of the movable contact piece is formed into a free end, a movable contact is fixedly welded at a position corresponding to the static contact, the protector pin is embedded on the right side of the protective cover, a protector pin extends to form an electric connecting piece, and the protector pin electric connecting piece is also embedded and matched with the right side of the protective cover, the tail end of the protector pin electric connecting sheet is folded and unfolded to form a protector pin electric connecting sheet electric connecting lug, the electric connecting lug of the protector pin electric connecting sheet is electrically connected with the electric connecting end of the static contact pin, the shield cover is fixed with the shield at the position corresponding to the right side of the shield and is in inserted fit with the protector inserting cavity of the protector inserting seat together with the shield, a shield limiting foot extends upwards from the central position of the upper edge of the left cavity wall of the protector inserting cavity, the end of the limited foot of the shield is resisted on the upper surface of the shield, a pair of shell cover forcing claws extend on the upper part of the shield cover, the pair of case cover pressing claws are contacted with the upward side of the case, a protector pin inserting cavity is formed on the shield cover and between the pair of case cover pressing claws, the protector pin is embedded in the protector pin embedding cavity and is electrically connected with the compressor three-wire column in a plugging mode in a use state.

In still another specific embodiment of the present invention, a insertion spring auxiliary leg connection plate extends on a front side surface of the insertion spring and at a position corresponding to a lower portion of the heating wire insertion spring electrical connection lug, and an insertion spring auxiliary leg extends on a side of a lengthwise middle portion of the insertion spring auxiliary leg connection plate that faces downward, the insertion spring auxiliary leg being supported on an insertion spring auxiliary leg support portion of the shield and extending to a lower portion of the shield; a spring-inserted auxiliary foot yielding cavity is formed on the left side of the protective cover and at a position corresponding to the spring-inserted auxiliary foot.

In a further specific embodiment of the present invention, a protector electrical lug defining cavity having the same shape as the protector pin electrical lug and communicating with the protector pin insertion cavity is formed on the right side of the protector cover cap and at a position corresponding to the protector pin electrical lug, a stationary contact pin electrical connection terminal passing hole is formed in the protector electrical connection tab defining cavity and at a position corresponding to the stationary contact pin electrical connection terminal, the protector pin electrical connection tab is embedded in the protector electrical connection tab defining cavity and the protector pin electrical connection tab is formed to correspond to a front side of the stationary contact pin electrical connection terminal passing hole, and the static contact pin electric connecting end of the static contact pin penetrates upwards through the protective cover at a position corresponding to the static contact pin electric connecting end through hole to ensure that the protector pin electric connecting piece electric connecting lug is electrically connected with the protector pin electric connecting piece in a welding mode.

In still another specific embodiment of the present invention, a moving contact piece flange is formed at a central left side of the middle portion of the moving contact piece and at a central position corresponding to the bimetal piece, and the moving contact piece flange is contacted with a central position of a right side surface of the bimetal piece.

In a more specific embodiment of the present invention, a pair of shroud cover inserting and embedding fixing posts are formed on the left side of the shroud cover, and a pair of fixing post inserting and embedding holes penetrating through the shroud cover are formed on the shroud cover and at positions corresponding to the pair of shroud cover inserting and embedding fixing posts, and the pair of shroud cover inserting and embedding fixing posts and the pair of fixing post inserting and embedding holes are inserted and embedded and fixed; the left side surface of the protective cover is formed into a protective cover arc surface matched with the left cavity wall of the protective cover inserting cavity of the protective cover inserting seat.

In yet another specific embodiment of the present invention, the pair of fixing post insertion holes are formed in a diagonally distributed positional relationship with each other on the shield, and the pair of shield cover insertion fixing posts are formed in a diagonally distributed positional relationship with each other on the shield cover.

In a still more specific embodiment of the present invention, an electrical connection pin hole penetrating through the housing cover is formed in the housing cover and at a position corresponding to the electrical connection pin, the electrical connection pin is inserted into the electrical connection pin hole and extends to a lower side of the housing cover, a first housing cover insert groove i penetrating through the housing cover is formed at a front end of the housing cover, and a second housing cover insert groove ii also penetrating through the housing cover is formed at a rear end of the housing cover; the external terminal mechanism comprises a first external terminal inserting piece I and a second external terminal inserting piece II, the first external terminal inserting piece I is inserted and embedded with a first inserting piece embedding groove I of the shell cover and fixed, a first external terminal inserting piece electric connecting pin I extends on the upper portion of the first external terminal inserting piece I and at a position corresponding to the external terminal electric connecting inserting piece pin, a first wiring pin I, a second external terminal inserting piece electric connecting pin II and a third external terminal inserting piece electric connecting pin III extend from the left to the right in sequence at intervals, the first external terminal inserting piece electric connecting pin I extends into the containing cavity of the starter and is inserted and embedded with the external terminal electric connecting inserting piece pin, the first wiring pin I, the second external terminal inserting piece electric connecting pin II and the third external terminal inserting piece electric connecting pin III are positioned below the shell cover, the fourth external terminal insert electric connecting pin IV, the second wiring pin II and the fifth external terminal insert electric connecting pin V are sequentially extended from left to right at intervals from the lower part of the second external terminal insert II, and are positioned below the shell cover and are electrically connected with the refrigerating system control circuit by a line in the use state; a first external terminal inserting piece limiting seat I for limiting the first external terminal inserting piece I is formed on one upward side of the shell cover at a position interval corresponding to the first inserting piece caulking groove I of the shell cover, and a second external terminal inserting piece limiting seat II for limiting the second external terminal inserting piece II is formed at a position interval corresponding to the second inserting piece caulking groove II of the shell cover; a first terminal screw I is provided on the first terminal pin I, and a second terminal screw II is provided on the second terminal pin II.

In yet another embodiment of the present invention, a housing cover pin fixing seat is formed on each of the front and rear outer walls of the housing, and a housing cover pin extends on each of the front and rear walls of the housing cover, the housing cover pin corresponding to and mating with the pair of housing cover pin fixing seats.

According to the technical scheme provided by the invention, the protector inserting and embedding seat with the protector inserting and embedding cavity in the semicircular shape extends leftwards on the left wall body of the shell, so that the protector with the appearance matched with the protector inserting and embedding cavity can be inserted and embedded and matched with the protector inserting and embedding cavity, and the requirements of miniaturization of volume, modularization of structure, quickness in assembly, convenience in inspection, maintenance and replacement and economy and cheapness are met.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a perspective assembly structure view of the protector shown in fig. 1.

Fig. 3 is a schematic view of the bottom of the housing shown in fig. 1.

Fig. 4 is a detailed structural view of the cover shown in fig. 1.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1.

First, the applicant needs to state that: in the actual usage state, i.e. when the present invention is mounted on a refrigeration compressor motor (simply referred to as "refrigeration compressor"), the state of fig. 1 is turned 180 ° with respect to the state shown in fig. 1, so that the upper portion and the orientation mentioned below are exactly the lower portion and the orientation mentioned below with respect to the usage state, and the front and rear mentioned below are exactly the opposite in the usage state, and the same is true in all cases; the state shown in fig. 3 is the actual state. Based on the foregoing, it is not intended that all of the following descriptions of directionality or orientation be interpreted as limiting.

Referring to fig. 1 and 3, there is shown a housing 1 having a starter receiving chamber 11 shown in fig. 3, a first pin receiving chamber i 12 and a second pin receiving chamber ii 13, a ptc thermistor left support flange 111 and a ptc thermistor right support flange 112 corresponding to each other are formed in the starter receiving chamber 11 and in the middle of the starter receiving chamber 11 with a surface projecting from the chamber bottom wall of the starter receiving chamber 11, the first pin receiving chamber i 12 and the second pin receiving chamber ii 13 are each surrounded by a pin receiving chamber step 16 at a position corresponding to the left side of the starter receiving chamber 11, that is, the first pin receiving chamber i 12 and the second pin receiving chamber ii 13 are surrounded by a pin receiving chamber step 16 at a position of the housing 1 facing the wall body of the one side of the starter receiving chamber 11, a first housing insertion hole I14 a is formed in the housing 1 at a position corresponding to the first pin receiving chamber I12, the first pin receiving chamber I12 is communicated with the outside through the first housing insertion hole I14 a, a second housing insertion hole II 14b is formed in the housing 1 at a position corresponding to the second pin receiving chamber II 13, and the second pin receiving chamber II 13 is communicated with the outside through the second housing insertion hole II 14 b; a cover 2 is shown, which cover 2 cooperates with a portion of the housing 1 facing downwards (upwards if in use, the same applies hereinafter) at the housing opening 14c (shown in fig. 3); a starter 3, a protector 4 and an external terminal mechanism 5 are shown, the starter 3 is disposed in the starter accommodating chamber 11 in a state of being supported between the PTC thermistor left support flange 111 and the PTC thermistor right support flange 112 and being inserted into the case cover 2, and is fitted into the case first insertion hole I14 a and the case second insertion hole II 14b at positions corresponding to the first pin accommodating chamber I12 and the second pin accommodating chamber II 13, respectively, the external terminal mechanism 5 is fitted into the case cover 2 at a position corresponding to a lower side of the case cover 2, and the external terminal mechanism 5 is electrically connected to the starter 3 by being inserted upwardly through the case cover 2 into the starter accommodating chamber 11.

The technical key points of the technical scheme provided by the invention are as follows: a protector insert seat 15 extends leftward on the left wall body of the housing 1, the front end of the protector insert seat 15 protrudes out of the front side surface of the housing 1, the rear end of the protector insert seat 15 protrudes out of the rear side surface of the housing 1, and the protector insert seat 15 has a protector insert cavity 151, the upward side of the protector insert cavity 151 constitutes a protector insert cavity opening 152, and the downward side constitutes a yield opening 153, and the shape of the protector insert cavity 151 is semicircular, the shape of the protector 4 is adapted to the shape of the protector insert cavity 151 and is in insert fit with the protector insert cavity 151. As shown in fig. 1 and 3, although the applicant previously referred to the shape of the protector insert cavity 151 as a semicircle, it may be referred to as a D-shape or an arcuate shape.

A first electrical insert piece limiting stop pin I21, a second electrical insert piece limiting stop pin II 22 and a positive temperature coefficient thermistor probing limiting cavity 23 are formed on one side of the shell cover 2 facing the starter accommodating cavity 11 of the shell 1, the first electrical insert piece limiting stop pin I21 and the second electrical insert piece limiting stop pin II 22 correspond to each other, namely the first electrical insert piece limiting stop pin I21 and the second electrical insert piece limiting stop pin II 22 correspond to each other in a front-back manner, the positive temperature coefficient thermistor probing limiting cavity 23 is positioned between the first electrical insert piece limiting stop pin I21 and the second electrical insert piece limiting stop pin II 22, the starter 3 comprises a positive temperature coefficient thermistor 31, a first electrical insert piece I32 and a second electrical insert piece II 33, the positive temperature coefficient thermistor 31 is arranged in a longitudinal state, and the upper edge part of the positive temperature coefficient thermistor 31 is supported on the left supporting flange 111 of the positive temperature coefficient thermistor and the positive temperature coefficient thermistor The lower part of the first electrical insert I32 is inserted into the limited cavity 23 of the PTC thermistor, the front side of the first electrical insert I32 is electrically contacted with the rear side of the PTC thermistor 31 through a press-holding spring in a shape of a Chinese character 'ji', the rear side of the first electrical insert I32 is limited by the first electrical insert limiting stop pin I21, the first electrical insert I32 is provided with a first electrical insert pin I321 and an electrical connection pin 322, the first electrical insert pin I321 is inserted into the first pin accommodating cavity I12 and corresponds to the first insertion hole I14 a of the shell, the electrical connection pin 322 is inserted into the shell cover 2 and extends to the lower part of the shell cover 2, the rear side of the second electrical insert II 33 is electrically contacted with the front side of the PTC thermistor 31 through a spring in a shape of a Chinese character 'ji', the front side of a second electric inserting piece II 33 is limited by the second electric inserting piece limiting stop pin II 22, the second electric inserting piece II 33 is provided with a second electric inserting piece pin II 331 and an external terminal electric connecting inserting piece pin 332, the second electric inserting piece pin II 331 extends into the second pin accommodating cavity II 13 and corresponds to the shell second inserting hole II 14b, and the external terminal mechanism 5 extends into the starter accommodating cavity 11 and is electrically connected with the external terminal electric connecting inserting piece pin 332; the first shell jack I14 a and the second shell jack II 14b are electrically connected with the three-wire column of the compressor in a plugging mode in a use state.

Referring to fig. 2 in combination with fig. 1 and 3, the protector 4 includes a shield 41, a shield cover 42, a plug spring 43, a heating wire 44a, a bimetal 44b, a first electrical connector i 45, a second electrical connector ii 46, a stationary contact pin 47, a movable contact 48 and a protector pin 49, a stationary contact pin insertion flange cavity 411, a plug spring positioning cavity 412, a plug spring pin support cavity 413, a heating wire cavity 414 and an electrical connector positioning cavity 415 are formed on the right side of the shield 41, the stationary contact pin insertion flange cavity 411 is located above the rear portion of the right side of the shield 41 and a pair of stationary contact pin positioning flange insertion grooves 4111 corresponding to each other are formed on the cavity bottom wall of the stationary contact pin insertion flange cavity 411, the pair of stationary contact pin positioning flange insertion grooves 4111 penetrate through the cavity bottom wall of the stationary contact pin insertion flange cavity 411 to communicate with the outside, the plug spring positioning cavity 412 corresponds to the lower portion of the stationary contact pin insertion flange cavity 411 and a plug spring positioning insertion groove 4121 is formed on the cavity bottom wall of the plug spring positioning cavity 412, the spring positioning insertion groove 4121 penetrates the cavity bottom wall of the spring positioning cavity 412 to communicate with the outside, the spring positioning support cavity 413 is formed at the edge portion of the rear lower portion of the right side of the shield 41 at a position corresponding to the spring positioning cavity 412 and communicates with the spring positioning cavity 412, the electric heating wire cavity 414 is formed at the right side center position of the shield 41, the electric connector positioning cavity 415 is located at the right side front of the shield 41 and an electric connector positioning insertion groove 4151 penetrating the cavity bottom wall of the electric connector positioning cavity 415 is formed on the cavity bottom wall of the electric connector positioning cavity 415, the base of the insertion spring 43 is located in the spring positioning cavity 412 and bent at the base of the insertion spring 43 to form a spring positioning insertion foot 431, the spring positioning insertion foot 431 is inserted and fixed with the spring positioning insertion groove 4121, a spring insertion foot 432 for connecting with an electric circuit (also called "electric circuit") in series is extended from the side of the insertion spring 43 facing the spring positioning insertion cavity 413, the insertion spring leg 432 is closely and supported on the insertion spring leg supporting chamber 413 and protrudes out of the lower surface of the shield 41, a heating wire insertion spring electrical connection ear 433 extends on the front side surface of the base of the insertion spring 43, the heating wire insertion spring electrical connection ear 433 extends into the heating wire chamber 414, the heating wire 44a is embedded in the heating wire chamber 414 in a C-shaped state, a heating wire first connection end i 441 of the heating wire 44a is connected with the heating wire insertion spring electrical connection ear 433, a heating wire second connection end ii 442 of the heating wire 44a is connected with a first electrical connection member i 45 by welding, as a preferable scheme, a heating wire limiting boss 4141 is formed at the center position of the heating wire chamber 414, the bimetal piece 44b covers the right side of the heating wire 44a, the first electrical connection member i 45 is disposed in the electrical connection member positioning chamber 415, an electrical connection member limiting strip 451 extends from the lower portion of the first electrical connection member i 45, the heating wire second connection terminal ii 442 is connected by welding to an electrical connector defining bar 451, an electrical connector positioning insert 4511 extends from the electrical connector defining bar 451 at a position corresponding to the electrical connector positioning insert groove 4151, the electrical connector positioning insert 4511 is fitted into the electrical connector positioning insert groove 4151, the second electrical connector ii 46 is fixed by welding to the first electrical connector i 45, the stationary contact pin 47 is disposed in the stationary contact pin insertion flange cavity 411, a pair of stationary contact pin insertion flanges 471 is formed on the stationary contact pin 47 at a position corresponding to the pair of stationary contact pin positioning flange insertion grooves 4111, the pair of stationary contact pin insertion flanges 471 is inserted into the pair of stationary contact pin positioning flange insertion grooves 4111, and a stationary contact 472 is fixed to the stationary contact pin 47, the stationary contact pin 47 penetrates the shield cover 42 toward an end of the shield cover 42 to form a stationary contact pin electrical connection terminal 473, one end of the movable contact piece 48 is integrally formed with the second electric connector II 46, the middle portion of the movable contact piece 48 is in contact with the right side of the bimetal piece 44b, the other end of the movable contact piece 48 is formed as a free end and is fixedly welded with a movable contact 481 at a position corresponding to the fixed contact 472, the protector pin 49 is fitted in the right side of the shield cap 42, and the protector pin 49 is extended with a protector pin electric connection piece 491 which is also fitted in the right side of the shield cap 42, the end of the protector pin electric connection piece 491 is folded and unfolded to form a protector pin electric connection piece electric connection lug 4911 which is electrically connected with the fixed contact pin electric connection end 473, the shield cap 42 is fixed to the shield 41 at a position corresponding to the right side of the shield 41 and is fitted in the protector insertion cavity 151 of the shield 15 together with the shield 41, a shield defining leg 1511 extends upward at a central position of an upper edge of a left cavity wall of the protector insertion cavity 151, a tip of the shield defining leg 1511 abuts on an upper surface of the shield 41, a pair of case cover urging holding claws 421 extends at an upper portion of the shield cover 42, the pair of case cover urging holding claws 421 abut on an upward facing side of the aforementioned case 1, a protector pin insertion cavity 422 is further formed at the shield cover 42 and at a position between the pair of case cover urging holding claws 421, and the aforementioned protector pin 49 is inserted in the protector pin insertion cavity 422 and electrically connected to the compressor three-wire pole in a plug-in manner in a use state.

The movable contact spring 48 and the second electric connector II 46 form an integral structure, so that the manufacturing process can be simplified, the manufacturing cost can be reduced, and the manufacturing efficiency can be improved. The movable contact 481 and the fixed contact 472 described above are preferably silver contacts.

Continuing to refer to fig. 2 in conjunction with fig. 1 and 3, a plug spring auxiliary leg connecting plate 434 for facilitating electrical connection and having a function as desired with respect to the plug spring leg 432 extends on the front side surface of the plug spring 43 at a position corresponding to the lower side of the heating wire plug spring electrical connecting lug 433, a plug spring auxiliary leg 4341 extends on the side of the middle portion of the plug spring auxiliary leg connecting plate 434 in the lengthwise direction facing downward, and the plug spring auxiliary leg 4341 is supported on the plug spring auxiliary leg supporting portion 417 of the shield 41 and extends to the lower side of the shield 41; a spring auxiliary leg relief chamber 423 is formed on the left side of the shroud cover 42 at a position corresponding to the spring auxiliary leg 4341.

As can be seen from the schematic views of fig. 2 and 3, the insertion spring leg 432 and the insertion spring auxiliary leg 4341 correspond to an insertion spring leg fitting cavity 1512 (also referred to as "insertion spring leg avoiding cavity") formed in the bottom wall of the protector insertion cavity 151.

A protector electrical connector defining cavity 425 having the same shape as the protector pin electrical connector 491 and communicating with the protector pin insertion cavity 422 is formed on the right side of the aforementioned protector cover cap 42 and at a position corresponding to the aforementioned protector pin electrical connector 491, a stationary contact pin electrical connection terminal passing hole 4251 is formed in the protector electrical connection terminal defining cavity 425 at a position corresponding to the aforementioned stationary contact pin electrical connection terminal 473, the protector pin electrical connection terminal 491 is embedded in the protector electrical connection terminal defining cavity 425 and the aforementioned protector pin electrical connection terminal electrical connection lug 4911 is formed in front of the stationary contact pin electrical connection terminal passing hole 4251, and the stationary contact pin electrical connection terminal 473 of the aforementioned stationary contact pin 47 is passed through the aforementioned protector cover 42 upward at a position corresponding to the stationary contact pin electrical connection terminal passing hole 4251 to be electrically connected to the aforementioned protector pin electrical connection terminal electrical connection lug 4911 by soldering.

Preferably, a movable contact piece flange 482 is formed at the left side of the middle of the movable contact piece 48 and at a central position corresponding to the bimetal piece 44b, and the movable contact piece flange 482 is in contact with the central position of the right side of the bimetal piece 44 b.

A pair of shroud cover insertion fixing posts 424 are formed on the left side of the shroud cover 42, a pair of fixing post insertion holes 416 penetrating the shroud 41 are formed in the shroud 41 at positions corresponding to the pair of shroud cover insertion fixing posts 424, and the pair of shroud cover insertion fixing posts 424 are inserted and fixed in the pair of fixing post insertion holes 416; the left side surface of the protector 41 is formed as a protector arcuate surface that matches the left cavity wall of the protector insertion cavity 151 of the protector insertion seat 15.

In the present embodiment, the pair of fixing post insertion holes 416 are formed in a diagonally distributed positional relationship with each other on the shroud 41, and the pair of shroud cover insertion fixing posts 424 are formed in a diagonally distributed positional relationship with each other on the shroud 42.

Preferably, after the pair of hood cover insertion fixing posts 424 are completely inserted into the pair of fixing post insertion holes 416 and slightly protrude out of the left side surface of the hood 41, the ends of the pair of hood cover insertion fixing posts 424 are melted by heating and form an expanded edge after cooling, so that the hood 41 and the hood cover 42 are sufficiently secured to each other.

Since the operating principle of the protector 4 is a known technology, for example, refer to the patent documents mentioned in the above background art column by the applicant, and the following description will be made only briefly, since the protector 4 is connected in series to an electric circuit, that is, an electric line, when the bimetal 44b is heated and deformed by the heating wire 44a, an urging force is generated to push the movable contact 48 upward, the movable contact 481 is separated from the fixed contact 472, the circuit, that is, the circuit, is disconnected, and the refrigeration compressor motor is protected. On the contrary, when the heating wire 44a or the heat radiation of the external environment is at a temperature lower than the temperature at which the bimetal 44b is sensed and deformed, the bimetal 44b is reset, the moving and stationary contacts 481 and 472 are closed (electrically contacted with each other), and the motor circuit of the refrigeration compressor is turned on again. As explained for the protector 4, the applicant is not repeated here, since the aforementioned operating principle of the starter 3 is also common knowledge and can likewise be referred to the patent documents mentioned in the background section.

Referring to fig. 4 in conjunction with fig. 1, an electrical connection pin hole 24 penetrating the housing cover 2 is formed on the housing cover 2 at a position corresponding to the electrical connection pin 322, the electrical connection pin 322 is inserted into the electrical connection pin hole 24 and extends to a lower side of the housing cover 2, a first housing cover insert groove i 25 penetrating the housing cover 2 is formed at a front end of the housing cover 2, and a second housing cover insert groove ii 26 also penetrating the housing cover 2 is formed at a rear end of the housing cover 2; the external terminal mechanism 5 comprises a first external terminal inserting piece I51 and a second external terminal inserting piece II 52, the first external terminal inserting piece I51 is inserted and fixed with the first inserting piece embedding groove I25 of the shell cover, a first external terminal inserting piece electric connecting pin I511 extends from the upper part of the first external terminal inserting piece I51 and the position corresponding to the external terminal electric connecting inserting piece pin 332, a first wiring pin I512, a second external terminal inserting piece electric connecting pin II 513 and a third external terminal inserting piece electric connecting pin III 514 extend from the left to the right at intervals in sequence from the lower part of the first external terminal inserting piece I51, the first external terminal inserting piece electric connecting pin I511 extends into the containing cavity 11 of the starter to be inserted and connected with the external terminal electric connecting inserting piece pin 332, the first wiring pin I512, the second external terminal inserting piece electric connecting pin II 513 and the third external terminal inserting piece electric connecting pin 514 are positioned below the shell cover 2, the second external terminal inserting piece II 52 is fixedly inserted into the second inserting piece embedding groove II 26 of the shell cover, a fourth external terminal inserting piece electric connecting pin IV 521, a second wiring pin II 522 and a fifth external terminal inserting piece electric connecting pin V523 sequentially extend from left to right at intervals from the lower part of the second external terminal inserting piece II 52, and the fourth external terminal inserting piece electric connecting pin IV 521, the second wiring pin II 522 and the fifth external terminal inserting piece electric connecting pin V523 are positioned below the shell cover 2 and are electrically connected with the control circuit of the refrigeration system by a line in a use state; a first external terminal insert piece limiting seat I27 a for limiting the first external terminal insert piece I51 is formed on one upward side of the shell cover 2 at a position interval corresponding to the shell cover first insert piece embedding groove I25, and a second external terminal insert piece limiting seat II 27b for limiting the second external terminal insert piece II 52 is formed at a position interval corresponding to the shell cover second insert piece embedding groove II 26; a first terminal screw I5121 is provided to the first terminal pin I512, and a second terminal screw II 5221 is provided to the second terminal pin II 522. Since the manner in which the first external terminal insertion piece i 51 and the second external terminal insertion piece ii 52 are electrically connected to the refrigeration system control circuit is known in the art, and reference can be made to the patent documents mentioned in the above background art column by the applicant, the description thereof is omitted.

Preferably, a housing cover pin fixing seat 17 is formed on each of the front and rear outer walls of the housing 1, and a housing cover pin 28 extends on each of the front and rear wall bodies of the housing cover 2, the position of the housing cover pin 28 corresponding to and mating with the pair of housing cover pin fixing seats 17.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims (10)

1. An integrated multi-terminal motor starting protector includes a housing (1), the housing (1) having a starter accommodating chamber (11), a first pin accommodating chamber I (12) and a second pin accommodating chamber II (13), a positive temperature coefficient thermistor left support flange (111) and a positive temperature coefficient thermistor right support flange (112) which are formed in the starter accommodating chamber (11) and located in the middle of the starter accommodating chamber (11) and which are protruded from the surface of the chamber bottom wall of the starter accommodating chamber (11) in left-right correspondence with each other, the first pin accommodating chamber I (12) and the second pin accommodating chamber II (13) each being surrounded by a pin accommodating chamber skirt (16) at a position corresponding to the left side of the starter accommodating chamber (11), a housing first insertion hole I (14a) being formed on the housing (1) and at a position corresponding to the first pin accommodating chamber I (12), the first pin receiving cavity I (12) is communicated with the outside through the first plug jack I (14a) of the shell, a second plug jack II (14b) of the shell is formed on the shell (1) and at a position corresponding to the second pin receiving cavity II (13), and the second plug jack II (13) is communicated with the outside through the second plug jack II (14b) of the shell; the shell cover (2), the shell cover (2) is matched with the part of the shell opening (14c) at the downward side of the shell (1); a starter (3), a protector (4) and an external terminal mechanism (5), the starter (3) being disposed in the starter accommodating chamber (11) in a state of being supported between the PTC thermistor left support flange (111) and the PTC thermistor right support flange (112) and being fitted into the housing first insertion hole I (14a) and the housing second insertion hole II (14b) at positions corresponding to the first pin accommodating chamber I (12) and the second pin accommodating chamber II (13), respectively, the external terminal mechanism (5) being fitted into the housing cover (2) at a position corresponding to a lower portion of the housing cover (2) and the external terminal mechanism (5) extending upward through the housing cover (2) into the starter accommodating chamber (11) to be electrically connected to the starter (3), characterized in that a protector insertion seat (15) extends leftward on a left upper portion of the housing (1), the front end of this protector inlays seat (15) is stretched out the leading flank of shell (1), and the trailing flank of shell (1) is stretched out to the rear end of protector inlays seat (15), and this protector inlays seat (15) has a protector and inlays chamber (151), and this protector inlays chamber (151) and constitutes the protector and inlays the uncovered (152) of chamber that inserts in one side ascending orientation, and one side constitution under the orientation has abdication mouth (153), and the shape of protector inlays chamber (151) is semicircular in shape, the shape of protector (4) is that the shape that inlays chamber (151) suits with the protector and inlays chamber (151) with the protector and inlays the cooperation of inserting.

2. The integrated multi-terminal motor starting protector according to claim 1, characterized in that a first electrical insert limiting block pin I (21), a second electrical insert limiting block pin II (22) and a positive temperature coefficient thermistor probing limiting cavity (23) are formed on one side of the housing cover (2) facing the starter accommodating cavity (11) of the housing (1), the first electrical insert limiting block pin I (21) and the second electrical insert limiting block pin II (22) correspond to each other, and the positive temperature coefficient thermistor probing limiting cavity (23) is located between the first electrical insert limiting block pin I (21) and the second electrical insert limiting block pin II (22); the starter (3) comprises a PTC thermistor (31), a first electrical blade I (32) and a second electrical blade II (33), the PTC thermistor (31) being arranged in a longitudinal position and the upper part of the PTC thermistor (31) being supported between the left PTC thermistor support flange (111) and the right PTC thermistor support flange (112) while the lower part of the PTC thermistor projects into the limiting chamber (23), the front side of the first electrical blade I (32) being in electrical contact with the rear side of the PTC thermistor (31) while the rear side of the first electrical blade I (32) is defined by the first electrical blade limiting stop pin I (21), the first electrical blade I (32) having a first electrical blade I (321) and an electrical connection pin (322), the first electric inserting sheet pin I (321) extends into the first pin accommodating cavity I (12) and corresponds to the first inserting hole I (14a) of the shell, the electric connecting pin (322) is inserted and matched with the shell cover (2) and extends to the lower part of the shell cover (2), the rear side of the second electric inserting sheet II (33) is electrically contacted with the front side of the positive temperature coefficient thermistor (31), the front side of the second electric inserting piece II (33) is limited by the second electric inserting piece limiting stop pin II (22), the second electric inserting piece II (33) is provided with a second electric inserting piece pin II (331) and an external terminal electric connecting inserting piece pin (332), the second electric inserting piece pin II (331) extends into the second pin accommodating cavity II (13) and corresponds to the second inserting hole II (14b) of the shell, the external terminal mechanism (5) extends into the starter accommodating cavity (11) and is electrically connected with the external terminal electrical connection insert pin (332); and the first shell jack I (14a) and the second shell jack II (14b) are electrically connected with the three-wire column of the compressor in a plugging mode in a use state.

3. The integrated multi-terminal motor start protector according to claim 1, wherein the protector (4) comprises a shield (41), a shield cover (42), an insertion spring (43), an electric heating wire (44a), a bimetal (44b), a first electrical connector i (45), a second electrical connector ii (46), a stationary contact pin (47), a movable contact piece (48) and a protector pin (49), a stationary contact pin insertion flange cavity (411), an insertion spring positioning cavity (412), an insertion spring pin support cavity (413), an electric heating wire cavity (414) and an electrical connector positioning cavity (415) are formed on the right side of the shield (41), the stationary contact pin insertion flange cavity (411) is located above the rear portion of the right side of the shield (41) and a pair of stationary contact pin positioning flange insertion grooves (4111) corresponding to each other are formed on the cavity bottom wall of the stationary contact pin insertion flange cavity (411), and the pair of stationary contact pin positioning flange insertion grooves (4111) penetrates through the cavity bottom wall of the stationary contact pin insertion flange cavity (411) and the outside world A spring positioning cavity (412) corresponding to the lower part of the static contact pin inserting flange cavity (411) and provided with a spring positioning inserting groove (4121) on the cavity bottom wall of the spring positioning cavity (412), the spring positioning inserting groove (4121) penetrates through the cavity bottom wall of the spring positioning cavity (412) to be communicated with the outside, a spring pin supporting cavity (413) corresponding to the spring positioning cavity (412) is formed at the edge part of the rear lower part of the right side of the shield (41) and communicated with the spring positioning cavity (412), an electric heating wire cavity (414) is formed at the right side central position of the shield (41), an electric connector positioning cavity (415) is positioned in front of the right side of the shield (41) and provided with an electric connector positioning inserting groove (4151) penetrating through the cavity bottom wall of the electric connector positioning cavity (415) on the cavity bottom wall of the electric connector positioning cavity (415), the base part of the spring (43) is positioned in the spring positioning cavity (412) and the base part of the spring (43) is bent and bent to form a spring positioning structure A plug spring positioning embedded pin (431) is formed, the plug spring positioning embedded pin (431) is fixedly inserted into the plug spring positioning embedded pin slot (4121), a plug spring pin (432) used for being connected with an electric circuit in series is extended from one side of the plug spring (43) facing to the plug spring pin supporting cavity (413), the plug spring pin (432) is tightly attached to and supported on the plug spring pin supporting cavity (413) and extends out of the lower surface of the shield (41), a heating wire plug spring electric connecting lug (433) is extended from the front side surface of the base part of the plug spring (43), the heating wire plug spring electric connecting lug (433) is extended into the heating wire cavity (414), a heating wire (44a) is embedded into the heating wire cavity (414) in a C-shaped state, a first connecting end I (441) of the heating wire (44a) is connected with the heating wire plug spring electric connecting lug (433), and a second connecting end II (442) of the heating wire (44a) is connected with a first connecting end I (45), a bimetal strip (44b) is covered on the right side of the heating wire (44a), a first electric connector I (45) is arranged in the electric connector positioning cavity (415), an electric connector limiting strip (451) extends from the lower part of the first electric connector I (45), a second heating wire connecting end II (442) is connected with the electric connector limiting strip (451), an electric connector positioning embedded foot (4511) extends from the electric connector limiting strip (451) at a position corresponding to the electric connector positioning embedded foot groove (4151), the electric connector positioning embedded foot (4511) is embedded in the electric connector positioning embedded foot groove (4151), a second electric connector II (46) is welded and fixed with the first electric connector I (45), a static contact foot (47) is arranged in the static contact foot embedded flange cavity (411), a pair of static contact foot embedded flanges (471) is formed on the static contact foot (47) at a position corresponding to the pair of static contact foot positioning embedded foot grooves (4111) ) A pair of stationary contact pin insertion flanges 471 inserted into and fixed to a pair of stationary contact pin positioning flange insertion grooves 4111, and a stationary contact 472 fixed to a stationary contact pin 47, one end of the stationary contact pin 47 passing through the shield cover 42 toward the one end of the shield cover 42 is formed as a stationary contact pin electrical connection terminal 473, one end of the movable contact piece 48 is formed as an integral structure with the second electrical connection member II 46, a middle portion of the movable contact piece 48 is brought into contact with a right side of the bimetal 44b, the other end of the movable contact piece 48 is formed as a free end and is welded and fixed with a movable contact 481 at a position corresponding to the stationary contact 472, a protector pin 49 inserted into a right side of the shield cover 42 is extended from the protector pin 49, and a protector pin electrical connection piece 491 is also inserted into and fitted to a right side of the shield cover 42, a protector pin electrical connection lug (4911) is formed by folding the end of the protector pin electrical connection piece (491), the protector pin electrical connection lug (4911) is electrically connected with the stationary contact pin electrical connection terminal (473), the protective cover lid (42) is fixed with the protective cover (41) at a position corresponding to the right side of the protective cover (41), and is in inserted fit with the protective cover (41) and the protective cover insertion embedding cavity (151) of the protective cover insertion embedding seat (15), a protective cover limiting pin (1511) extends upwards at the central position of the upper edge of the left cavity wall of the protective cover insertion embedding cavity (151), the end of the protective cover limiting pin (1511) abuts against the upper surface of the protective cover (41), a pair of cover pressing claws (421) extends at the upper part of the protective cover lid (42), the pair of cover pressing claws (421) abuts against the upward side of the housing (1), a protector pin insertion cavity (422) is formed on the shield cover (42) at a position between the pair of cover pressing claws (421), and the protector pin (49) is inserted into the protector pin insertion cavity (422) and is electrically connected with the compressor three-wire column in a plugging mode in a use state.

4. The one-piece multi-terminal motor-starting protector according to claim 3, wherein a plug-spring auxiliary leg connection plate (434) extends on a front side surface of the plug spring (43) at a position corresponding to a lower portion of the heating wire plug-spring electrical connection lug (433), a plug-spring auxiliary leg (4341) extends on a side of a lengthwise middle portion of the plug-spring auxiliary leg connection plate (434) that faces downward, the plug-spring auxiliary leg (4341) is supported on a plug-spring auxiliary leg support portion (417) of the shield (41) and extends to a lower portion of the shield (41); a spring-assisted foot relief chamber (423) is formed on the left side of the shroud cover (42) at a position corresponding to the spring-assisted foot (4341).

5. The one-piece multi-terminal motor start protector according to claim 3, characterized in that a protector electrical lug defining chamber (425) having the same shape as the protector pin electrical lug (491) and communicating with the protector pin insertion chamber (422) is formed on the right side of the protector cover cap (42) and at a position corresponding to the protector pin electrical lug (491), a stationary contact pin electrical connection terminal passing hole (4251) is opened in the protector electrical lug defining chamber (425) and at a position corresponding to the stationary contact pin electrical connection terminal (473), the protector pin electrical connection terminal (491) is inserted in the protector electrical lug defining chamber (425) and the protector pin electrical connection tab (4911) corresponds to the front side of the stationary contact pin electrical connection terminal passing hole (4251), the stationary contact pin electrical connection terminal (473) of the stationary contact pin (47) corresponds to the stationary contact pin electrical connection terminal passing hole (4251) at a position corresponding to the stationary contact pin electrical connection terminal passing hole (425) 4251) Is upwardly directed through the shroud cover (42) for the protector pin electrical lug (4911) to be soldered thereto.

6. An integral type multi-terminal motor starting protector according to claim 3, wherein a moving contact flange (482) is formed at a central position corresponding to the bimetal (44b) at a left side of a middle portion of said moving contact (48), the moving contact flange (482) being in contact with a central position of a right side surface of the bimetal (44 b).

7. The integrated multi-terminal motor start protector according to claim 3, wherein a pair of shroud cover insertion fixing posts (424) are formed on the left side of the shroud cover (42), and a pair of fixing post insertion holes (416) penetrating the shroud (41) are formed on the shroud (41) at positions corresponding to the pair of shroud cover insertion fixing posts (424), the pair of shroud cover insertion fixing posts (424) being inserted and fixed with the pair of fixing post insertion holes (416); the left side surface of the shield (41) is formed into a shield arc surface matched with the left cavity wall of the protector inserting cavity (151) of the protector inserting seat (15).

8. The integrated multi-terminal motor start protector of claim 7 wherein said pair of mounting post insertion apertures (416) are in diagonally spaced relation to each other on said shroud (41) and said pair of shroud cover insertion mounting posts (424) are in diagonally spaced relation to each other on said shroud cover (42).

9. The integrated multi-terminal motor starting protector according to claim 2, characterized in that an electrical connection pin hole (24) penetrating the housing cover (2) is formed in the housing cover (2) and at a position corresponding to the electrical connection pin (322), the electrical connection pin (322) is inserted into the electrical connection pin hole (24) and extends to a lower side of the housing cover (2), a housing cover first insert groove i (25) penetrating the housing cover (2) is formed at a front end of the housing cover (2), and a housing cover second insert groove ii (26) also penetrating the housing cover (2) is formed at a rear end of the housing cover (2); the external terminal mechanism (5) comprises a first external terminal inserting piece I (51) and a second external terminal inserting piece II (52), the first external terminal inserting piece I (51) is fixedly inserted into a first inserting piece embedding groove I (25) of the shell cover, a first external terminal inserting piece electrical connecting pin I (511) extends on the upper portion of the first external terminal inserting piece I (51) and at a position corresponding to the external terminal electrical connecting inserting piece pin (332), a first wiring pin I (512), a second external terminal inserting piece electrical connecting pin II (513) and a third external terminal inserting piece electrical connecting pin III (514) sequentially extend from left to right at intervals from the lower portion of the first external terminal inserting piece I (51), the first external terminal inserting piece electrical connecting pin I (511) stretches into the starter accommodating cavity (11) and is connected with the external terminal electrical connecting pin (332) in an inserting and embedding manner, a first wiring pin I (512), a second external terminal insert electric connection pin II (513) and a third external terminal insert electric connection pin III (514) are positioned below the shell cover (2), and is electrically connected with a control circuit of the refrigeration system by a circuit in a use state, the second external terminal inserting piece II (52) is fixedly inserted into the second inserting piece embedding groove II (26) of the shell cover, a fourth external terminal inserting sheet electric connecting pin IV (521), a second wiring pin II (522) and a fifth external terminal inserting sheet electric connecting pin V (523) are sequentially extended from left to right at intervals on the lower part of the second external terminal inserting sheet II (52), the fourth external terminal insert electric connecting pin IV (521), the second wiring pin II (522) and the fifth external terminal insert electric connecting pin V (523) are positioned below the shell cover (2) and are electrically connected with a refrigerating system control circuit by a line in a use state; a first external terminal insert piece limiting seat I (27a) used for limiting the first external terminal insert piece I (51) is formed on one side, facing upwards, of the shell cover (2) at a position interval corresponding to the first insert piece embedding groove I (25) of the shell cover, and a second external terminal insert piece limiting seat II (27b) used for limiting the second external terminal insert piece II (52) is formed at a position interval corresponding to the second insert piece embedding groove II (26) of the shell cover; a first terminal pin I (5121) is provided on the first terminal pin I (512), and a second terminal screw II (5221) is provided on the second terminal pin II (522).

10. The one-piece multi-terminal motor starting protector according to claim 1, 2 or 9, wherein a housing cover pin fixing seat (17) is formed on each of the front and rear outer walls of the housing (1), and a housing cover pin (28) extends on each of the front and rear wall bodies of the housing cover (2), the housing cover pin (28) being positioned to correspond to and mate with a pair of housing cover pin fixing seats (17).

Images