Terminal Box Protection Device for Motor Starting Protector of Refrigeration Compressor

Abstract

A terminal box protection device for a motor starter protector of a refrigeration compressor, the refrigeration compressor includes a refrigeration compressor body, and a compressor terminal seat is provided on the left outer wall thereof; the terminal box protection device includes an insulating cover and a fireproof cover, the right side of the fireproof cover cavity is an opening of the fireproof cover, the insulating cover is accommodated in the fireproof cover cavity, and the right side is an opening of the insulating cover, and the characteristics are: the terminal box protection device also includes a line anti-pull-off mechanism, the line anti-pull-off mechanism is inserted and fixed with the fireproof cover, and the fireproof cover is inserted and fixed with the compressor terminal seat; the position of the insulating cover in the fireproof cover cavity is located on the left side of the motor starter protector, and a support column is provided on the left cavity wall of the insulating cover cavity, the right end of the support column protrudes out of the opening of the insulating cover and the right end face abuts against the left side face of the motor starter protector, and a clearance opening of the end of the clamp body is provided on the bottom wall of the insulating cover cavity. Advantages: improving the installation efficiency of the fireproof cover and the reliability of installation and fixation; good electrical connection effect; fireproof.

Description

Technical Field

[0001] The present invention belongs to the technical field of auxiliary components of refrigeration compressors, and particularly relates to a wiring box protection device for a motor starting protector of a refrigeration compressor. Background Art

[0002] According to professional common sense, refrigeration compressors used in electrical appliances such as refrigerators, freezers, and food freezing and refrigeration display cabinets usually need to be equipped with components such as motor starters (i.e., "refrigeration compressor motor starters", the same hereinafter) and protectors (i.e., "refrigeration compressor motor overload protectors", the same hereinafter) outside the body (i.e., the compressor body), and are connected to an electrical controller electrically connected to an external power supply circuit by a line. Therefore, a wiring box is usually provided on the refrigeration compressor, which plays a positive role in making the system assembly neat, and more importantly, can prevent the aforementioned motor starting protector from being affected by the external environment to ensure the reliability of the compressor operation. As is known in the industry, the compressor has three wire posts, which are also called "three-wire pins" or "pins". The aforementioned starter and overload protector are inserted into the three-wire posts through the three-wire post jacks on them. That is to say, the electrical connection between the motor starting protector and the refrigeration compressor is realized by the insertion of the three-wire post jacks corresponding to and mating with the three-wire posts on the motor starter housing and the overload protector housing. Since the specific structures and action mechanisms of the aforementioned motor starter and the overload protector arranged in a parasitic manner on the motor starter can be found in a large number of publicly available Chinese patent documents, for example: CN204425125U (a non-power-consuming energy-saving single-phase AC motor starting protector with improved structure), CN2606490Y (motor starter and protector), CN113489382A (an integrated motor starting protector), etc., the applicant will not elaborate further.

[0003] Technical information related to the aforementioned wiring box can also be found in publicly available Chinese patent documents, such as CN201204415Y (a wiring box for a refrigeration compressor), CN2903821Y (a wiring box for a refrigerator compressor), CN101924335A (a symmetrical box seat type buckle wiring box for a rotary compressor), and CN201779923U (a touchable wiring box for a refrigerator compressor).

[0004] As for technical information related to the wiring box protection device of a refrigeration compressor, it can also be found in publicly available patent documents. For example, CN202370810U recommends a "protection mechanism for the wiring box of a refrigeration compressor", and CN105065234B provides a "two-device cover assembly for a compressor and a compressor having the same", etc.

[0005] During the operation of a refrigeration compressor, sometimes extreme abnormal situations that are not desired but cannot be absolutely avoided may occur, such as lightning strikes, too high power supply voltage, too high ambient temperature, and / or electronic component failures or even malfunctions, etc. As a result, the components and wiring system inside the refrigeration compressor may catch fire. The small fire situation generated inside the junction box often easily breaks through the box body and / or the box cover of the junction box, causing the fire to spread outward and leading to a larger fire. Although the probability of the foregoing situation is relatively low and it is only possible to occur under extreme circumstances, due to the relatively large absolute number of refrigerators and the like in social possession, such reports are not uncommon in reality, which not only cause irreparable losses to users, but also have an adverse negative impact on manufacturers. In addition, once abnormalities occur in the connectors and electrical circuits inside the junction box, leakage accidents and the like are likely to be triggered. The "protection mechanism for the junction box of a refrigeration compressor" recommended by the foregoing CN202370810U can overcome the foregoing deficiencies to a certain extent. For details, refer to paragraphs 0015 and 0019 to 0020 of its specification. However, the CN202370810U still has the following deficiencies: First, since a cover body structure that combines an electrical insulation cover and a fire protection cover is adopted, the fixation of the cover body to the box base is rather troublesome. Specifically, it is necessary to drill several screw holes on the box base (which can also be called the "cover fixing base") fixed to the refrigeration compressor body and also drill corresponding screw holes on the cover body so that the cover body and the box base can be fixed by screws. Therefore, the installation is very troublesome and the installation efficiency is affected. Second, since the cover body structure formed by combining the electrical insulation cover and the fire protection cover does not have the function of restricting or controlling the lines connected to the wiring pins (i.e., "wiring feet") of the motor starting protector inserted and matched with the three-wire post of the refrigeration compressor, there is a risk of the lines being separated from the wiring pins of the motor starting protector during such links as assembly, warehousing, transportation, and use, causing malfunctions and affecting the use. Third, since the cover body only plays a role in protecting the motor starting protector and does not have the function of ensuring that the motor starting protector and the wiring post of the refrigeration compressor always maintain a good inserted and matched state at the initial assembly, during the operation of the refrigeration compressor, due to vibration, the motor starting protector will displace in the direction away from the refrigeration compressor, affecting the electrical connection effect between the motor starting protector and the wiring post, and even the situation where the motor starting protector is separated from the wiring post may occur. In view of the foregoing, it is necessary to make improvements, and the technical solution to be introduced below is generated under this background. Summary of the Invention

[0006] The object of the present invention is to provide a wiring box protection device for a motor starting protector of a refrigeration compressor, which helps to improve the installation efficiency of the housing and the reliability of installation and fixation, is conducive to effectively controlling the circuit electrically connected to the connection pins of the motor starting protector without the situation of the circuit being separated from the connection pins, is beneficial to keeping the motor starting protector in a reliable electrical plug-in connection state with the terminal of the refrigeration compressor body to prevent the motor starting protector from displacing in the direction away from the refrigeration compressor, and is convenient to fully ensure the fireproof effect of the housing when the motor starting protector catches fire in extreme cases to avoid the spread of fire.

[0007] The object of the present invention is achieved as follows. A wiring box protection device for a motor starting protector of a refrigeration compressor, the refrigeration compressor includes a refrigeration compressor body, on the left outer wall of the refrigeration compressor body, a compressor terminal block seat is fixed, and the terminal of the refrigeration compressor body extends to the left side of the compressor terminal block seat and is fixedly insulated from the compressor terminal block seat; the wiring box protection device includes an insulating housing and a fireproof housing, the fireproof housing has a fireproof housing cavity for shielding the motor starting protector that is plug-fitted and fixed to the terminal to achieve electrical connection with the terminal, the right side of the fireproof housing cavity is configured as an open mouth of the fireproof housing, and the fireproof housing is fixed to the compressor terminal block seat, the insulating housing is accommodated in the fireproof housing cavity, the right side of the insulating housing cavity of the insulating housing is configured as an open mouth of the insulating housing, and it is characterized in that the wiring box protection device further has a circuit anti-pulling and detachment mechanism for controlling the circuit electrically connected to the motor starting protector, the circuit anti-pulling and detachment mechanism is fixedly inserted and fitted with the fireproof housing, and the fireproof housing is fixedly fitted with the compressor terminal block seat; the insulating housing is located on the left side of the motor starting protector in the fireproof housing cavity, on the left cavity wall of the insulating housing cavity, a support column is formed, the right end of the support column extends out of the open mouth of the insulating housing and the right end face of the support column abuts against the left side face of the motor starting protector, and a clamping body end portion relief opening is formed on the bottom wall of the insulating housing cavity of the insulating housing cavity.

[0008] In a specific embodiment of the present invention, the number of the terminal posts is three; the motor starting protector includes a refrigeration compressor motor starter and a refrigeration compressor motor overload protector. On one side of the refrigeration compressor motor starter housing of the refrigeration compressor motor starter facing the compressor terminal post seat, a pair of starter electrical connection jacks are formed. This pair of starter electrical connection jacks correspond to and are inserted with two of the three terminal posts. The refrigeration compressor motor overload protector housing of the refrigeration compressor motor overload protector and the refrigeration compressor motor starter housing form an integral structure, and on one side of the refrigeration compressor motor overload protector housing facing the compressor terminal post seat, a protector electrical connection jack is formed. This protector electrical connection jack corresponds to and is inserted with the remaining one of the three terminal posts; the left side surface of the insulating cover housing is in contact with the right side surface of the left side wall of the fireproof cover housing. Between the front of the bottom wall of the fireproof cover housing and the lower part of the front side wall of the fireproof cover housing, a fireproof cover housing wire outlet is formed. The wire anti-pulling and disengaging mechanism is inserted and fixed to the fireproof cover housing at a position corresponding to the fireproof cover housing wire outlet; the end part relief opening of the clamp body corresponds to the left end of the fireproof cover housing wire outlet.

[0009] In another specific embodiment of the present invention, the right end face of the support post abuts against the left side surface of the refrigeration compressor motor starter housing of the refrigeration compressor motor starter.

[0010] In yet another specific embodiment of the present invention, a fireproof cover housing front side wall fixing foot is fixed to the front side of the compressor terminal post seat, and a fireproof cover housing rear side wall fixing foot is fixed to the rear side of the compressor terminal post seat and at a position corresponding to the fireproof cover housing front side wall fixing foot; the front side wall of the fireproof cover housing is fixed to the fireproof cover housing front side wall fixing foot, and the rear side wall of the fireproof cover housing is fitted and fixed to the fireproof cover housing rear side wall fixing foot.

[0011] In yet another specific embodiment of the present invention, a fixing threaded hole for the front side wall of the fireproof housing is provided on the fixing foot of the front side wall of the fireproof housing; a spring piece hole for the rear side wall of the fireproof housing is provided on the fixing foot of the rear side wall of the fireproof housing; a fixing screw hole for the front side wall of the fireproof housing is provided on the front side wall of the fireproof housing and at a position corresponding to the fixing threaded hole for the front side wall of the fireproof housing. A fixing screw for the front side wall of the fireproof housing is provided on the fixing screw hole for the front side wall of the fireproof housing. A spring piece for the rear side wall of the fireproof housing is formed on the rear side wall of the fireproof housing and at a position corresponding to the spring piece hole for the rear side wall of the fireproof housing. The front side wall of the fireproof housing is fixed to the fixing foot of the front side wall of the fireproof housing by screwing the fixing screw for the front side wall of the fireproof housing into the fixing threaded hole for the front side wall of the fireproof housing, and the rear side wall of the fireproof housing is fitted and fixed to the fixing foot of the rear side wall of the fireproof housing by the spring piece for the rear side wall of the fireproof housing being snapped into the spring piece hole for the rear side wall of the fireproof housing.

[0012] In still another specific embodiment of the present invention, a fixing foot for the ground wire is fixed on the front side of the compressor terminal block base and at a position corresponding to the lower part of the fixing foot of the front side wall of the fireproof housing. A fixing screw hole for the ground wire is provided on the fixing foot for the ground wire. The fixing screw hole for the ground wire is a threaded hole. A fixing screw for the ground wire is screwed on the fixing screw hole for the ground wire. One end of a ground wire for the fireproof housing is fixed on the fixing screw for the ground wire, and the other end of the ground wire for the fireproof housing is formed as a lead-out end for the ground wire.

[0013] In yet another specific embodiment of the present invention, a mating strip for the upper clip body slot is formed below the front side wall of the fireproof housing and at a position corresponding to the upper part of the wire outlet of the fireproof housing, and a mating strip for the lower clip body slot is formed in front of the bottom wall of the fireproof housing and at a position corresponding to the lower part of the wire outlet of the fireproof housing. The mating strip for the upper clip body slot and the mating strip for the lower clip body slot are correspondingly arranged up and down. The wire anti-pulling and -detaching mechanism is inserted and fixed to both the mating strip for the upper clip body slot and the mating strip for the lower clip body slot at a position corresponding to the wire outlet of the fireproof housing.

[0014] In yet another specific embodiment of the present invention, the wire anti-pulling and detaching mechanism includes an upper clamping body and a lower clamping body. The right ends of the upper clamping body and the lower clamping body are hinged to each other through a clamping body hinge pin shaft. At least a pair of upper clamping body wire clamping cavities that are separated from each other are formed in the middle of the upper clamping body and on the side facing the lower clamping body. A positioning column hole is provided at the left end of the upper clamping body. At least a pair of lower clamping body wire clamping cavities that are separated from each other are formed in the middle of the lower clamping body and on the side facing the upper clamping body. This pair of lower clamping body wire clamping cavities corresponds to the pair of upper clamping body wire clamping cavities. A positioning column is formed on the upward side at the left end of the lower clamping body and at a position corresponding to the positioning column hole. This positioning column is inserted into the positioning column hole. The side of the upper clamping body facing away from the lower clamping body is fixedly inserted and fitted with the upper clamping body slot matching strip, and the side of the lower clamping body facing away from the upper clamping body is fixedly inserted and fitted with the lower clamping body slot matching strip.

[0015] In yet another more specific embodiment of the present invention, an upper clamping body slot is formed on the side of the upper clamping body facing away from the lower clamping body, and a lower clamping body slot is formed on the side of the lower clamping body facing away from the upper clamping body. The upper clamping body slot is fixedly inserted and fitted with the upper clamping body slot matching strip, and the lower clamping body slot is fixedly inserted and fitted with the lower clamping body slot matching strip.

[0016] In yet another further specific embodiment of the present invention, the shapes of the pair of upper clamping body wire clamping cavities and the pair of lower clamping body wire clamping cavities are semi-circular, and a circular cavity is formed after the upper and lower clamping body wire clamping cavities are matched with each other.

[0017] The technical effect of the technical solution provided by the present invention is as follows: Since the fire protection cover can be quickly fixed to the compressor terminal block seat in the state of shielding the insulating cover and the motor starting protector, the installation efficiency and the reliability of installation and fixation of the fire protection cover can be significantly improved; Since a wire anti-pulling and detaching mechanism that is inserted and fixed to the fire protection cover is added, the wires electrically connected to the connection pins of the motor starting protector can be effectively controlled, and the situation where the wires are separated from the connection pins will not occur; Since the support column formed on the left cavity wall of the insulating cover cavity applies a force to the motor starting protector in the direction towards the compressor terminal block seat, the motor starting protector can always be in a reliable plugging state with the terminal block, and the situation where it is displaced leftward from the terminal block and affects the electrical connection effect will not occur; Since the fire protection cover can play its due fire protection role when the motor starting protector catches fire caused by extreme situations, it can prevent the spread of fire and avoid the users of the refrigeration device with a refrigeration compressor from suffering enlarged economic and property losses. Description of the Drawings

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0019] Figure 2 It is Figure 1Schematic diagram of the fireproof housing shown together with the wire anti-pulling-off mechanism inserted and fixed to the fireproof housing rotated 90 degrees clockwise.

[0020] Figure 3 For Figure 1 Schematic diagram after the insulation housing shown is assembled with the fireproof housing. Specific embodiments

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant will make a detailed description below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the technical solutions of the present invention. Any equivalent transformation that is merely formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0022] In the following descriptions, all concepts related to directions or orientations such as up, down, left, right, front, and back are based on Figure 1 the position state where it is located, and thus cannot be understood as a special limitation on the technical solutions provided by the present invention.

[0023] Please refer to Figure 1 , which shows a refrigeration compressor body 1 of the structural system of a refrigeration compressor. On the left outer wall of the refrigeration compressor body 1, a compressor terminal block base 11 is preferably fixed by welding. The terminal 12 of the refrigeration compressor body 1 extends horizontally ( Figure 1 taking the position state shown as an example) to the left of the compressor terminal block base 11 and is insulated and fixed to the compressor terminal block base 11 at the part passing through the compressor terminal block base 11; it shows an insulation housing 2 and a fireproof housing 3 of the structural system of the junction box protection device. The insulation housing 2 is molded from a non-metallic material, such as plastic. The fireproof housing 3 made of metal has a fireproof housing cavity 31 for shielding (protecting) a motor starting protector 5 that is inserted and fixed to the aforementioned terminal 12 to achieve electrical connection with the terminal 12. The right side of the fireproof housing cavity 31 is configured as a fireproof housing opening 32, that is to say, the right side of the fireproof housing cavity 31 is not closed, and the fireproof housing 3 is fixed to the aforementioned compressor terminal block base 11. The aforementioned insulation housing 2 is accommodated in the fireproof housing cavity 31. The right side of the insulation housing cavity 21 of the insulation housing 2 is configured as an insulation housing opening 22, that is to say, the right side of the insulation housing cavity 21 is not closed.

[0024] Technical key points of the technical solution provided by the present invention: In the structural system of the aforementioned junction box protection device, there is also a wire anti-pulling and disengaging mechanism 4 (which can also be called "wire limiting mechanism", "wire positioning mechanism" or "wire fixing mechanism", etc., the same hereinafter) for controlling the wires electrically connected to the aforementioned motor starting protector 5. The wire anti-pulling and disengaging mechanism 4 is fixedly inserted and fitted with the aforementioned fireproof housing 3, and the fireproof housing 3 is fixedly fitted with the aforementioned compressor terminal block base 11; the position of the aforementioned insulating housing 2 in the aforementioned fireproof housing cavity 31 is on the left side of the aforementioned motor starting protector 5. On the left cavity wall of the insulating housing cavity 21, a support column 23 is formed. The right end of the support column 23 protrudes from the open end 22 of the insulating housing, and the right end face of the support column 23 abuts against the left side surface of the aforementioned motor starting protector 5. On the bottom wall of the insulating housing cavity 21 of the insulating housing cavity 21, a clamping body end portion relief opening 24 is provided.

[0025] Continue to see Figure 1 , since the number of the aforementioned terminal posts 12 (i.e., "electrical connection posts") is three, the industry usually refers to it as a three-wire post. The aforementioned motor starting protector 5 includes a refrigeration compressor motor starter 51 and a refrigeration compressor motor overload protector 52. On the side of the refrigeration compressor motor starter housing of the refrigeration compressor motor starter 51 facing the aforementioned compressor terminal block base 11, that is, on the right side of the refrigeration compressor motor starter housing, a pair of starter electrical connection jacks (not shown in the figure) are formed. The pair of starter electrical connection jacks correspond to and are inserted and mated with two of the aforementioned three terminal posts 12, that is, Figure 1 the two terminal posts 12 at the lower part in the position state shown in the figure. The refrigeration compressor motor overload protector housing of the refrigeration compressor motor overload protector 52 and the refrigeration compressor motor starter housing form an integral structure, that is, they are integrally molded by plastic, and on the side of the refrigeration compressor motor overload protector housing facing the aforementioned compressor terminal block base 11, a protector electrical connection jack (not shown in the figure) is formed. The protector electrical connection jack corresponds to and is inserted and mated with the remaining one of the aforementioned three terminal posts 12, that is, Figure 1 the one terminal post 12 at the upper part in the position state shown in the figure. The left side surface of the insulating housing of the aforementioned insulating housing 2 is in contact with the right side surface of the left side wall of the fireproof housing of the fireproof housing 3. Between the front of the bottom wall 33 of the fireproof housing 3 and the lower part of the front side wall 34 of the fireproof housing, a fireproof housing wire outlet 35 is formed. The aforementioned wire anti-pulling and disengaging mechanism 4 is fixedly inserted and fitted with the fireproof housing 3 at the position corresponding to the fireproof housing wire outlet 35; the aforementioned clamping body end portion relief opening 24 corresponds to the left end of the aforementioned fireproof housing wire outlet 35.

[0026] In Figure 1Shown are three starter electrical connection pins 511 of the structural system of the refrigeration compressor motor starter 51. Among them, the upper and lower corresponding starter electrical connection pins 511 in the front two positions are connected. Also shown is a protector electrical connection pin 521 of the structural system of the refrigeration compressor motor overload protector 52. In addition, in Figure 1 also shown are a starter electrical connection pin line 5111 electrically connected to the starter electrical connection pin 511 and a protector electrical connection pin line 5211 electrically connected to the protector electrical connection pin 521. Since the specific structures and working principles of the refrigeration compressor motor starter 51 and the refrigeration compressor motor overload protector 52 belong to the prior art, for example, reference can be mainly made to Chinese patent documents CN113489382A (integrated motor starter protector) and CN2606491Y (integrated motor starter and protector), the applicant will not elaborate in detail.

[0027] As Figure 1 shown, the right end face of the aforementioned support column 23 abuts against the left side surface of the refrigeration compressor motor starter housing of the aforementioned refrigeration compressor motor starter 51. During the operation of the refrigeration compressor body 1, it will not cause the refrigeration compressor motor starter 51 together with the refrigeration compressor motor overload protector 52 to shift leftward from the aforementioned terminal post 12, thus ensuring a lasting and reliable electrical connection effect between the motor starter protector 5 and the terminal post 12.

[0028] As Figure 1 shown, a fixed foot 111 of the front side wall of the fireproof cover is preferably fixed to the front side of the aforementioned compressor terminal post seat 11 by welding. At the rear side of the compressor terminal post seat 11 and at a position corresponding to the fixed foot 111 of the front side wall of the fireproof cover, a fixed foot 113 of the rear side wall of the fireproof cover is also preferably fixed by welding. The front side wall 34 of the fireproof cover of the aforementioned fireproof cover 3 is fixed to the fixed foot 111 of the front side wall of the fireproof cover, and the rear side wall 36 of the fireproof cover of the fireproof cover 3 is fixed to the fixed foot 113 of the rear side wall of the fireproof cover.

[0029] Continue to see Figure 1A fireproof cover front wall fixing threaded hole 1111 is provided on the aforementioned fireproof cover front wall fixing foot 111; a fireproof cover rear wall spring hole 1131 is provided on the aforementioned fireproof cover rear wall fixing foot 113; a fireproof cover front wall fixing screw hole 37a is formed by stamping on the fireproof cover front wall 34 of the aforementioned fireproof cover 3 and at a position corresponding to the aforementioned fireproof cover front wall fixing threaded hole 1111, and a fireproof cover front wall fixing screw 37b is provided on the fireproof cover front wall fixing screw hole 37a, and a fireproof cover front wall fixing screw 37b is provided on the aforementioned fireproof cover front wall fixing screw hole 37a. A fireproof shell rear side wall spring piece 37c is formed by stamping on the fireproof shell rear side wall and at a position corresponding to the fireproof shell rear side wall spring piece hole 1131. The fireproof shell front side wall fixing screw 37b is screwed into the fireproof shell front side wall fixing threaded hole 1111 to fix the fireproof shell front side wall 34 to the fireproof shell front side wall fixing foot 111. The fireproof shell rear side wall spring piece 37c is ejected into the fireproof shell rear side wall spring piece hole 1131 to engage and fix the fireproof shell rear side wall 36 to the fireproof shell rear side wall fixing foot 113.

[0030] A grounding wire fixing foot 112 is fixed on the front side of the aforementioned compressor terminal seat 11 and at a position corresponding to the lower side of the aforementioned fireproof cover front wall fixing foot 111. A grounding wire fixing screw hole 1121 is provided on the grounding wire fixing foot 112. The grounding wire fixing screw hole 1121 is a threaded hole, and a grounding wire fixing screw 11211 is provided on the grounding wire fixing screw hole 1121. One end of a fireproof cover grounding wire 38 is fixed on the grounding wire fixing screw 11211, and the other end of the fireproof cover grounding wire 38 constitutes a grounding wire lead-out end. When in use, the grounding wire lead-out end is fixed to the shell of a refrigeration device such as a refrigerator, a freezer, or a food freezing and refrigeration display cabinet.

[0031] See also Figure 2 and Figure 3 And combined with Figure 1 An upper clamp body slot mating strip 341 is formed below the front side wall 34 of the aforementioned fireproof cover and at a position corresponding to the upper side of the aforementioned fireproof cover outlet 35, and a lower clamp body slot mating strip 331 is formed in front of the bottom wall 33 of the aforementioned fireproof cover and at a position corresponding to the lower side of the aforementioned fireproof cover outlet 35. The upper clamp body slot mating strip 341 and the lower clamp body slot mating strip 331 correspond to each other up and down, and the aforementioned line anti-pull-off mechanism 4 is simultaneously inserted and fixed with the upper clamp body slot mating strip 341 and the lower clamp body slot mating strip 331 at the position corresponding to the aforementioned fireproof cover outlet 35.

[0032] Please see the key Figure 1 And combined with Figure 2 and Figure 3, the aforementioned wire anti-pulling and disengaging mechanism 4 includes an upper clamping body 41 and a lower clamping body 42. The right ends of the upper clamping body 41 and the lower clamping body 42 are hinged to each other through a clamping body hinge pin 43. In the middle of the upper clamping body 41 and on the side facing the lower clamping body 42, there are formed a pair of upper clamping body wire clamping cavities 411 that are separated from each other, that is, spaced apart from each other. And a positioning post hole 412 is formed at the left end of the upper clamping body 41. In the middle of the lower clamping body 42 and on the side facing the upper clamping body 41, there are formed a pair of lower clamping body wire clamping cavities 421 that are separated from each other, that is, spaced apart from each other. This pair of lower clamping body wire clamping cavities 421 corresponds to the aforementioned pair of upper clamping body wire clamping cavities 411. On the upper side of the left end of the lower clamping body 42 and at the position corresponding to the aforementioned positioning post hole 412, a positioning post 422 is formed. This positioning post 422 is inserted into the positioning post hole 412. The side of the upper clamping body 41 facing away from the lower clamping body 42, that is, the upper side, is inserted and fixed with the aforementioned upper clamping body slot matching strip 341. The side of the lower clamping body 42 facing away from the upper clamping body 41, that is, the lower side, is inserted and fixed with the aforementioned lower clamping body slot matching strip 331. The upper and lower clamping body wire clamping cavities 411 and 421 can also each have three.

[0033] Please refer to Figure 1 and Figure 2 , on the side of the aforementioned upper clamping body 41 facing away from the aforementioned lower clamping body 42, that is, on the upper side of the upper clamping body 41, an upper clamping body slot 413 is formed. On the side of the aforementioned lower clamping body 42 facing away from the aforementioned upper clamping body 41, that is, on the lower side of the lower clamping body 41, a lower clamping body slot 423 is formed. The upper clamping body slot 413 is inserted and fixed with the aforementioned upper clamping body slot matching strip 341. The lower clamping body slot 423 is inserted and fixed with the aforementioned lower clamping body slot matching strip 331. It can be seen from this that the function of the aforementioned clamping body end relief opening 24 is to avoid interference with the left ends of the upper and lower clamping bodies 41 and 42.

[0034] As Figure 1 shown, the shapes of the aforementioned pair of upper clamping body wire clamping cavities 411 and the pair of lower clamping body wire clamping cavities 421 are semicircular (also can be called "C-shaped"), and after the upper and lower clamping body wire clamping cavities 411 and 421 cooperate with each other, a complete circular cavity is formed.

[0035] First, reasonably place the aforementioned starter electrical connection pin circuit 5111 and the protector electrical connection pin circuit 5211 separately in two circuit insulation protection sleeves, and respectively place them (which can also be called "passing through") between the pair of upper and lower clamp body wire clamping cavities 411 and 421 described above. Then, close the upper clamp body 41 and the lower clamp body 42. At this time, the positioning post 422 cooperates with the positioning post hole 412. Next, insert the upper clamp body slot 413 and the lower clamp body slot 423 into the upper clamp body slot mating strip 341 and the lower clamp body slot mating strip 331 respectively, so as to limit the upper and lower clamp bodies 41 and 42 at the position of the fireproof housing wire outlet 35. At the same time, clamp the aforementioned circuits by the upper and lower clamp body wire clamping cavities 411 and 421 to ensure that the aforementioned starter electrical connection pin circuit 5111 does not break away (fall off) from the starter electrical connection pin 511 and ensure that the protector electrical connection pin circuit 5211 does not break away (fall off) from the protector electrical connection pin 521. The other ends of the led-out starter electrical connection pin circuit 5121 and the protector electrical connection pin circuit 5211 are electrically connected to the electrical controller of a refrigeration device such as a refrigerator.

[0036] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A wiring box protection device for a motor starting protector of a refrigeration compressor. The refrigeration compressor includes a refrigeration compressor body (1). A compressor terminal block base (11) is fixed on the left outer wall of the refrigeration compressor body (1). The terminal (12) of the refrigeration compressor body (1) extends to the left side of the compressor terminal block base (11) and is fixedly insulated from the compressor terminal block base (11). The wiring box protection device includes an insulating housing (2) and a fireproof housing (3). The fireproof housing (3) has a fireproof housing cavity (31) for shielding a motor starting protector (5) that is fixedly inserted with the terminal (12) to achieve electrical connection with the terminal (12). The right side of the fireproof housing cavity (31) is configured as a fireproof housing opening (32), and the fireproof housing (3) is fixed to the compressor terminal block base (11). The insulating housing (2) is accommodated in the fireproof housing cavity (31). The right side of the insulating housing cavity (21) of the insulating housing (2) is configured as an insulating housing opening (22). It is characterized in that The wiring box protection device further includes a wire anti-pulling and disengaging mechanism (4) for controlling the wires electrically connected to the motor starting protector (5). The wire anti-pulling and disengaging mechanism (4) is fixedly inserted into the fireproof cover (3), and the fireproof cover (3) is fixedly fitted with the compressor terminal block base (11); the insulating cover (2) is located on the left side of the motor starting protector (5) within the fireproof cover cavity (31). A support column (23) is formed on the left cavity wall of the insulating cover cavity (21). The right end of the support column (23) extends out of the opening (22) of the insulating cover, and the right end face of the support column (23) abuts against the left side face of the motor starting protector (5). A clamping body end portion clearance opening (24) is formed in the bottom wall of the insulating cover cavity (21).

2. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 1, characterized in that There are three terminal blocks (12); the motor starting protector (5) includes a refrigeration compressor motor starter (51) and a refrigeration compressor motor overload protector (52). On the side of the refrigeration compressor motor starter housing of the refrigeration compressor motor starter (51) facing the compressor terminal block base (11), a pair of starter electrical connection jacks are formed, which correspond to and are inserted with two of the three terminal blocks (12). The refrigeration compressor motor overload protector housing of the refrigeration compressor motor overload protector (52) is integrally structured with the refrigeration compressor motor starter housing, and on the side of the refrigeration compressor motor overload protector housing facing the compressor terminal block base (11), a protector electrical connection jack is formed, which corresponds to and is inserted with the remaining one of the three terminal blocks (12); the left side face of the insulating cover (2) is in contact with the right side face of the left side wall of the fireproof cover (3). Between the front of the bottom wall (33) of the fireproof cover (3) and the lower part of the front side wall (34) of the fireproof cover, a fireproof cover wire outlet (35) is formed. The wire anti-pulling and disengaging mechanism (4) is fixedly inserted into the fireproof cover (3) at a position corresponding to the fireproof cover wire outlet (35); the clamping body end portion clearance opening (24) corresponds to the left end of the fireproof cover wire outlet (35).

3. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 2, characterized in that The right end face of the support column (23) abuts against the left side face of the refrigeration compressor motor starter housing of the refrigeration compressor motor starter (51).

4. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 2, characterized in that A fireproof cover front side wall fixing foot (111) is fixed on the front side of the compressor terminal block base (11), and a fireproof cover rear side wall fixing foot (113) is fixed on the rear side of the compressor terminal block base (11) at a position corresponding to the fireproof cover front side wall fixing foot (111); the front side wall (34) of the fireproof cover (3) is fixed to the fireproof cover front side wall fixing foot (111), and the rear side wall (36) of the fireproof cover (3) is fixedly fitted with the fireproof cover rear side wall fixing foot (113).

5. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 4, characterized in that A fireproof housing front side wall fixing screw hole (1111) is provided on the fireproof housing front side wall fixing foot (111); a fireproof housing rear side wall elastic piece hole (1131) is provided on the fireproof housing rear side wall fixing foot (113); a fireproof housing front side wall fixing screw hole (37a) is provided on the fireproof housing front side wall (34) of the fireproof housing (3) and at a position corresponding to the fireproof housing front side wall fixing screw hole (1111). A fireproof housing front side wall fixing screw (37b) is disposed on the fireproof housing front side wall fixing screw hole (37a). A fireproof housing rear side wall elastic piece (37c) is formed on the fireproof housing rear side wall (36) of the fireproof housing (3) and at a position corresponding to the fireproof housing rear side wall elastic piece hole (1131). The fireproof housing front side wall (34) is fixed to the fireproof housing front side wall fixing foot (111) by screwing the fireproof housing front side wall fixing screw (37b) into the fireproof housing front side wall fixing screw hole (1111), and the fireproof housing rear side wall (36) is fitted and fixed to the fireproof housing rear side wall fixing foot (113) by snapping the fireproof housing rear side wall elastic piece (37c) into the fireproof housing rear side wall elastic piece hole (1131).

6. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 5, characterized in that A ground wire fixing foot (112) is fixed on the front side of the compressor terminal block base (11) and at a position corresponding to the lower part of the fireproof housing front side wall fixing foot (111). A ground wire fixing screw hole (1121) is provided on the ground wire fixing foot (112). The ground wire fixing screw hole (1121) is a threaded hole. A ground wire fixing screw (11211) is screwed on the ground wire fixing screw hole (1121). One end of a fireproof housing ground wire (38) is fixed on the ground wire fixing screw (11211), and the other end of the fireproof housing ground wire (38) is formed as a ground wire lead-out end.

7. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 2, characterized in that An upper clamp body slot mating strip (341) is formed on the lower part of the fireproof housing front side wall (34) and at a position corresponding to the upper part of the fireproof housing wire outlet (35). A lower clamp body slot mating strip (331) is formed in front of the fireproof housing bottom wall (33) and at a position corresponding to the lower part of the fireproof housing wire outlet (35). The upper clamp body slot mating strip (341) and the lower clamp body slot mating strip (331) are vertically corresponding to each other. The wire anti-pulling-off mechanism (4) is inserted and fixed to both the upper clamp body slot mating strip (341) and the lower clamp body slot mating strip (331) at a position corresponding to the fireproof housing wire outlet (35).

8. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 7, characterized in that The wire anti-pulling and disengaging mechanism (4) includes an upper clamping body (41) and a lower clamping body (42). The right ends of the upper clamping body (41) and the lower clamping body (42) are hinged to each other through a clamping body hinge pin shaft (43). At least a pair of upper clamping body wire clamping cavities (411) which are separated from each other are formed in the middle of the upper clamping body (41) and on the side facing the lower clamping body (42). A positioning column hole (412) is formed at the left end of the upper clamping body (41). At least a pair of lower clamping body wire clamping cavities (421) which are separated from each other are formed in the middle of the lower clamping body (42) and on the side facing the upper clamping body (41). This pair of lower clamping body wire clamping cavities (421) corresponds to the pair of upper clamping body wire clamping cavities (411). A positioning column (422) is formed on the upper side at the left end of the lower clamping body (42) and at the position corresponding to the positioning column hole (412). This positioning column (422) is inserted into the positioning column hole (412). The side of the upper clamping body (41) facing away from the lower clamping body (42) is inserted and fixed with the upper clamping body slot matching strip (341). The side of the lower clamping body (42) facing away from the upper clamping body (41) is inserted and fixed with the lower clamping body slot matching strip (331).

9. The wiring box protection device of the motor starting protector of the refrigeration compressor according to claim 8, characterized in that An upper clamping body slot (413) is formed on the side of the upper clamping body (41) facing away from the lower clamping body (42). A lower clamping body slot (423) is formed on the side of the lower clamping body (42) facing away from the upper clamping body (41). The upper clamping body slot (413) is inserted and fixed with the upper clamping body slot matching strip (341). The lower clamping body slot (423) is inserted and fixed with the lower clamping body slot matching strip (331).

10. The junction box protection device of the motor starting protector of the refrigeration compressor according to claim 8, characterized in that The shapes of the pair of upper clamping body wire clamping cavities (411) and the pair of lower clamping body wire clamping cavities (421) are semi-circular, and a circular cavity is formed after the upper and lower clamping body wire clamping cavities (411, 421) are matched with each other.

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