Combined structure of current type starter and protector

Abstract

The combined structure of the current type starter and the protector comprises the current type starter and the protector, the current type starter is provided with an S pin and an M pin, the protector is provided with a protector pin, and the combined structure is characterized by further comprising an integrated installation mechanism which comprises a protector pin supporting seat and a protector pin locking cover, the protector pin supporting seat is located on the upward side of a current type starter cover plate of the current type starter and corresponds to the upper portion of the S pin and the upper portion of the M pin across the current type starter cover plate, and the protector pin is supported on the protector pin supporting seat and corresponds to the upper portion between the S pin and the M pin. And the protector pin locking cover is matched with the protector pin supporting seat in an inserting and embedding manner at a position corresponding to the upper part of the protector pin so as to lock the protector pin on the protector pin supporting seat. The method has the advantages that volume increase and obvious cost increase are avoided; assembly process links are reduced, and assembly efficiency is improved; and the reliability and the safety of the three-line column assembled on the refrigeration compressor are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration compressor motor starting and protection devices, and in particular relates to a combined structure of a current starter and a protector. Background Art

[0002] The aforementioned current starter mainly refers to but is not absolutely limited to the heavy hammer current starter. The heavy hammer current starter is mainly used for compressors that require a large starting current, that is, it can provide the necessary current support at the time of starting, helping the compressor to start smoothly and reach a normal working state. Furthermore, the heavy hammer current starter is particularly suitable for compressors that require a higher current at the time of starting, such as refrigeration equipment such as commercial freezers and refrigerators.

[0003] The working principle of the weight current starter is based on the electromagnetic principle, and the magnetic field generated by the current is used to control the start and operation of the compressor. Specifically, when the current is turned on, since the refrigeration compressor motor cannot rotate immediately, a large starting current will be generated. This current generates enough magnetic force through the coil of the weight current starter to attract the weight to rise, thereby closing the moving and static heads, connecting the starting winding circuit, and starting the motor to rotate. As the motor speed increases, the starting current gradually decreases. When the speed reaches a certain level, the weight drops due to its own gravity or electromagnetic changes, disconnecting the connection between the moving contact and the static contact, thereby disconnecting the aforementioned starting winding circuit, and the refrigeration compressor motor enters normal operation.

[0004] Technical information related to the aforementioned heavy hammer current starter can be found in the public Chinese patent documents, such as "a heavy hammer starter with improved sealing performance" provided by CN202906801U, "a fully enclosed heavy hammer starter for R600a working fluid refrigeration compressor" recommended by CN2733039Y, and "a heavy hammer current starter with improved structure" introduced by CN206481237U, etc.

[0005] The aforementioned protector (i.e. "motor protector", the same below) is the abbreviation of the overheat (overload) protector of the refrigeration compressor motor. After the refrigeration compressor enters the normal operation state, it is usually necessary to implement protection by the overheat protector. Its purpose is: when the refrigeration compressor is overloaded during operation, it disconnects the power supply to avoid overheating and damage to the refrigeration compressor. There is no shortage of technical information on protectors in the public Chinese patent documents, such as CN2821846Y (a compressor overheat protector), CN208673997U (a thermal protector), CN215187850U ​​(an integrated multi-terminal motor starter protector for refrigeration compressors) and CN219203076U (a refrigeration compressor motor overheat protector), etc.

[0006] As is known in the industry, the aforementioned current starter and protector are assembled on the refrigeration compressor by plugging them into the three-wire column on the refrigeration compressor. Specifically, the protector pin hole of the protector is first plugged into the protector in the three-wire column on the refrigeration compressor, and then the S socket and M socket of the structural system of the current starter are respectively plugged into the S pin and M pin in the three-wire column on the refrigeration compressor. Of course, it is also possible to install the current starter first and then the protector.

[0007] As is still known in the industry, the reason why the aforementioned protectors are flat (typically such as the CN219203076U mentioned above) and cylindrical (typically such as the "single-phase AC motor overload protector" recommended by CN100356652C) is because it involves its function and installation method, that is, it is related to its function and installation method. The flat design is difficult to apply to the overload protection of commercial large current compressors due to its small internal space, while the disc-shaped or circular design is more suitable for commercial large current overload protection due to its large internal space. In addition, the protector of the refrigeration compressor also needs to consider the electrical connection factor with the compressor. The flat structure helps to reduce the occupation of the external space of the product, making the wiring and electrical connection relatively convenient; the disc-shaped or circular shape is closer to the compressor housing due to its temperature sensing piece, which is more conducive to the full play of the overheating and overload protection function, making the various performances of the protector more stable and reliable. In short, the flat and disc-shaped designs of the refrigeration compressor motor protector are to better adapt to the installation requirements of the compressor, ensure that the function of the protector is effectively exerted, and at the same time ensure the convenience, stability and reliability of the electrical connection.

[0008] As for the specific installation process of the current starter and the protector mentioned above by the applicant, whether the current starter is installed first and then the protector, or the protector is installed first and then the current starter, the assembly with the three-wire column of the refrigeration compressor can be completed through two installations.

[0009] Some people may think that if the heavy hammer current starter (i.e. "current starter") and the protector are designed as an integrated structure, then the installation requirements of the one-time and three-wire columns of the refrigeration compressor can be met regardless of order. This idea can simplify the design and reduce costs in theory, but in actual operation, it will face the following unavoidable problems: First, due to the different working principles and protection mechanisms of the two devices, combining them together requires solving technical compatibility issues to ensure that the two do not interfere with each other in function; second, merging the two functions will significantly increase the complexity (degree) of the design, which will increase the manufacturing cost. For example, the applicant's trial proved that based on the inevitable comprehensive cost (including mold development, so as to obtain the re-development of a completely different production line), the price will be higher. However, the price of many refrigeration compressors has dropped to a very low level, so this is obviously unacceptable to refrigeration compressor manufacturers. Moreover, the size of the current starter and protector designed together is large, and it is difficult or even impossible to install them on the smaller refrigeration compressors currently commonly used in the market; furthermore, in terms of the model composition of the two devices, in order to meet the mutual matching of more models, the flexible matching of the integrated two devices has no obvious advantage. The combined or modular installation structure is more flexible for customer procurement and manufacturer process management. For example, after the finished products of the protector monomer and the starter monomer are completed, they can be flexibly combined and matched, thereby effectively reducing inventory and shortening the supply cycle, that is, making the production process of the starter and protector more adaptable to market demand. From the perspective of safety and reliability, separating the two can better ensure the independence and stability of their respective functions and avoid safety problems.

[0010] Due to the constraints of factors not limited to the above, the industry has assumed that the current starter and the protector are two independent components that are not connected to each other, which is an objective fact that must be accepted and recognized. However, at the same time, it is very confused about the two installations of the current starter and the protector, because the two installations require additional installation processes (process steps) and if they are installed manually, it is necessary to increase the number of installation workers on the production line, which is not conducive to saving precious labor resources. In particular, during the plug-in assembly process, the protector monomer (a single-hole structure with one pin) and the current starter monomer (a double-hole structure with two pins) are prone to tilting at an angle and direction when holding the product, which may cause damage to the plug-in connector and even connection failure. What's more, there is a risk of poor contact and ignition, which may cause fire accidents during use by users.

[0011] Based on the above factors, it is of positive significance to explore ways to reasonably combine the current starter and the protector to change the two installations into one installation, avoid increasing the volume, reflect the economy, and ensure the reliability advantages of three-hole installation on the same plane. The technical solution to be introduced below was produced in this context. Summary of the invention

[0012] The task of the present invention is to provide a combination structure of a current starter and a protector that helps to avoid increasing the volume and significantly increasing the cost so as to meet the requirements of installation on the three-wire column of a refrigeration compressor and embody economy, is conducive to changing two installations in sequence to a one-time installation without any sequence, thereby reducing the assembly process links, improving assembly efficiency and saving precious labor resources, and is beneficial to ensuring the reliability and safety of the three-wire column installed on the refrigeration compressor so as to eliminate fire accidents caused by factors such as ignition during daily use by users.

[0013] The task of the present invention is accomplished in this way. A combined structure of a current starter and a protector includes a current starter and a protector, wherein the current starter has an S pin and an M pin, and the protector has a protector pin. The structure is characterized in that it also includes a collective installation mechanism, which includes a protector pin support seat and a protector pin locking cover. The protector pin support seat is located on the upper side of the current starter cover plate of the current starter and corresponds to the top of the S pin and the M pin across the current starter cover plate. The protector pin is supported on the protector pin support seat and corresponds to the top between the S pin and the M pin. The protector pin locking cover is inserted and matched with the protector pin support seat at a position corresponding to the top of the protector pin to lock the protector pin on the protector pin support seat.

[0014] In a specific embodiment of the present invention, the protector pin support seat is located at the center of the side of the front end of the current starter cover plate facing upward, a locking cover left guide slider is formed on the left side of the protector pin support seat, and a locking cover right guide slider is formed on the right side of the protector pin support seat, and a guide slider connecting block is formed at the rear edge of the protector pin support seat, the locking cover left guide slider and the locking cover right guide slider correspond to each other left and right, and the guide slider connecting block is connected to the rear ends of the left and right guide sliders of the locking cover toward one side, and the left and right guide sliders of the locking cover are connected. The guide slider and the guide slider connecting block protrude from the upper surface of the protector pin supporting seat and together constitute a stack edge in the shape of a "]", and the space in the "]-shaped area constitutes a protector pin accommodating chamber; the protector pin corresponds to the upper part between the S pin and the M pin of the current starter when the protector pin is accommodated in the protector pin accommodating chamber via the guide slider connecting block; the protector pin locking cover is simultaneously engaged with the left guide slider of the locking cover and the right guide slider of the locking cover to lock the protector pin in the protector pin accommodating chamber.

[0015] In another specific embodiment of the present invention, a left insertion space of the locking cover is formed between the bottom surface of the left guide slider of the locking cover in the length direction and the upper surface of the current starter cover, and a right insertion space of the locking cover is formed between the bottom surface of the right guide slider of the locking cover in the length direction and the upper surface of the current starter cover, and the protector pin locking cover is simultaneously inserted and matched with the left insertion space of the locking cover and the right insertion space of the locking cover to lock the protector pin in the protector pin accommodating cavity, and the front end face of the protector pin and the S pin and the M pin are on the same longitudinal plane.

[0016] In another specific embodiment of the present invention, a protector pin neck accommodating cavity is formed on the upper side of the guide slider connection block and located in the middle of the length direction of the guide slider connection block. The protector pin has a protector pin electrical connection wire fixing seat, and a protector pin neck is formed between the protector pin electrical connection wire fixing seat and the protector pin, and the protector pin neck is supported in the protector pin neck accommodating cavity.

[0017] In another specific embodiment of the present invention, a protector pin electrical connection wire fixing seat block is extended upwardly in a state perpendicular to the current starter cover plate on the upward side of the current starter cover plate and at a position corresponding to the middle rear part of the length direction of the guide slider connecting block, and an electrical connection wire fixing seat cavity is maintained between the protector pin electrical connection wire fixing seat block and the opposite side of the guide slider connecting block, and the protector pin electrical connection wire fixing seat is embedded in the electrical connection wire fixing seat cavity.

[0018] In another specific embodiment of the present invention, the protector pin locking cover is configured with a locking cover cavity extending from the front end to the rear end, the left cavity wall of the locking cover cavity is inserted and matched with the left guide sliding block of the locking cover, and the right cavity wall of the locking cover cavity is inserted and matched with the right guide sliding block of the locking cover, and a protector pin locking cavity is configured at the center position of the locking cover cavity top wall of the locking cover cavity, and the protector pin is matched with the protector pin locking cavity.

[0019] In a more specific embodiment of the present invention, a left cavity wall insert strip is formed at the lower part of the left cavity wall of the locking cover cavity in the longitudinal direction, and a left guide slider mating groove of the locking cover is formed at a position located above the left cavity wall insert strip in the longitudinal direction; a right cavity wall insert strip is formed at the lower part of the right cavity wall of the locking cover cavity in the longitudinal direction, and a right guide slider mating groove of the locking cover is formed at a position located above the right cavity wall insert strip in the longitudinal direction; the left cavity wall insert strip is inserted and matched with the left inserting space of the locking cover, the left guide slider of the locking cover is inserted and matched with the left guide slider mating groove of the locking cover, the right cavity wall insert strip is inserted and matched with the right inserting space of the locking cover, and the right guide slider of the locking cover is inserted and matched with the right guide slider mating groove of the locking cover.

[0020] In a further specific embodiment of the present invention, the protector pin, S pin and M pin correspond to and match the three-wire column of the refrigeration compressor, and the protector pin, S pin and M pin form a triangular distribution relationship with each other; the triangle is an isosceles triangle.

[0021] In yet another specific embodiment of the present invention, the current starter cover plate and the protector pin support seat are both molded from plastic into an integral structure.

[0022] In yet another specific embodiment of the present invention, after the current starter cover plate and the protector pin support seat are both formed separately from plastic, the protector pin support seat is fixed to the current starter cover plate by bonding.

[0023] One of the technical effects of the technical solution provided by the present invention is that, due to the use of a collective installation mechanism composed of a protector pin support seat and a protector pin locking cover and located on the current starter cover, the collective installation mechanism locks the protector pin of the protector on the current starter cover, and makes the protector pin correspond to the upper part between the S pin and the M pin of the current starter, thereby helping to avoid increasing the volume and significantly increasing the cost, so as to meet the requirements of installation on the three-wire column of the refrigeration compressor and reflect the economy; secondly, since the collective installation mechanism can ensure that the protector pin is plugged into the three-wire column of the refrigeration compressor at the same time along with the S pin and the M pin of the current starter, it can reduce the assembly process links, improve the assembly efficiency, and save precious labor resources; thirdly, since the current starter and the protector in the prior art are installed twice in sequence and then installed once without sequence, it is beneficial to ensure the reliability and safety of the installation on the three-wire column of the refrigeration compressor, and it can eliminate factors such as ignition caused by poor electrical contact during daily use by users, and even fire accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of an embodiment of the present invention; Figure 2 It is a schematic diagram of an application example of the present invention. DETAILED DESCRIPTION

[0025] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0026] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 The current position state is used as a reference, and thus it cannot be understood as a special limitation on the technical solution provided by the present invention.

[0027] See also Figure 1, showing a current starter 1 (a hammer current starter in this embodiment) and a protector 2, which can be referred to as a current starter. Since the specific internal (intrinsic) structure and action mechanism of the current starter 1 belong to the prior art, for example, see CN206481237U (improved structural hammer current starter), and since the specific internal (intrinsic) structure and action mechanism of the protector also belong to the prior art, for example, see the "single-phase AC motor overload protector" recommended by the aforementioned CN100356652C, the applicant only mentions individual related components below, and does not fully explain. However, the applicant needs to explain that the aforementioned protector 2 in this embodiment is applicable to all powers.

[0028] exist Figure 1 In FIG. 1 , an S pin 11 a and an M pin 11 b of the aforementioned current starter 1 are shown, and a protector pin 21 of the protector 2 is shown.

[0029] The technical key points of the technical solution provided by the present invention are as follows: the structural system of the combined structure of the current starter and the protector also includes a collective installation mechanism 3, which includes a protector pin support seat 31 and a protector pin locking cover 32. The protector pin support seat 31 is located on the upper side of the current starter cover 12 of the current starter 1 and corresponds to the upper part of the S pin 11a and the M pin 11b across the current starter cover 12. The protector pin 21 is supported on the protector pin support seat 31 and corresponds to the upper part between the S pin 11a and the M pin 11b. The protector pin locking cover 32 is inserted and matched with the protector pin support seat 31 at a position corresponding to the upper part of the protector pin 21 to lock the protector pin 21 on the protector pin support seat 31, that is, to confine it.

[0030] Figure 1 The figure shows a negative temperature coefficient thermistor (NTC) 13, a coil 14 and a pair of electrical connection plugs 15 of the current starter 1. The current starter cover 12 is riveted to the current starter body 16 of the current starter 1, and the figure shows a rivet 122 used to rivet the current starter cover 12 to the current starter body 16.

[0031] See you next time Figure 1The protector pin support seat 31 is located at the center of the side of the front end of the current starter cover 12 facing upward, and a locking cover left guide slider 311 is formed on the left side of the protector pin support seat 31, and a locking cover right guide slider 312 is formed on the right side of the protector pin support seat 31, and a guide slider connecting block 313 is formed on the rear edge of the protector pin support seat 31, the locking cover left guide slider 311 and the locking cover right guide slider 312 correspond to each other on the left and right, and the guide slider connecting block 313 is connected to the rear ends of the left and right guide sliders 311 and 312 of the locking cover facing one side, and the locking cover left and right guide sliders 311 and 312 and the guide slider engaging block 313 are connected to the rear ends of the left and right guide sliders 311 and 312 of the locking cover. The connecting block 313 protrudes from the upper surface of the aforementioned protector pin support seat 31 and together constitutes a stack edge in the shape of a letter "]" (also known as a letter "⊓" shape), and the space within the letter "]" constitutes a protector pin accommodating chamber 314; the aforementioned protector pin 21 passes through the aforementioned guide slider connecting block 313 and corresponds to the upper part between the S pin 11a and the M pin 11b of the aforementioned current starter 1 when accommodated in the aforementioned protector pin accommodating chamber 314; the aforementioned protector pin locking cover 32 is simultaneously inserted and matched with the aforementioned locking cover left guide slider 311 and the locking cover right guide slider 312 to lock the aforementioned protector pin 21 in the aforementioned protector pin accommodating chamber 314.

[0032] A locking cover left insertion space 3111 ( Figure 2 ), and a locking cover right insertion space 3121 is formed between the bottom surface of the locking cover right guide slider 312 in the length direction and the upper surface of the current starter cover 12, and the protector pin locking cover 32 is simultaneously inserted and matched with the locking cover left insertion space 3111 and the locking cover right insertion space 3121 to lock the protector pin 21 in the protector pin accommodating cavity 314, and the protector pin 21 and the front end faces of the S pin 11a and the M pin 11b are in the same longitudinal plane. That is to say, the front end faces of the protector pin 21, the S pin 11a and the M pin 11b are consistent, that is, flush.

[0033] See you next time Figure 1A protector pin neck accommodating cavity 3131 is formed on the upper side of the guide slider connection block 313 and located in the middle of the length direction of the guide slider connection block 313. The protector pin 21 has a protector pin electrical connection wire fixing seat 211. A protector pin neck 212 is formed between the protector pin electrical connection wire fixing seat 211 and the protector pin 21. The protector pin neck 212 is supported in the protector pin neck accommodating cavity 3131, that is, supported on the protector pin neck accommodating cavity 3131.

[0034] On the upward side of the aforementioned current starter cover 12 and at a position corresponding to the middle rear part of the length direction of the aforementioned guide slider connecting block 313, a protector pin electrical connection wire fixing seat block 121 is extended upward in a state perpendicular to the current starter cover 12, and an electrical connection wire fixing seat cavity 1211 is maintained between the protector pin electrical connection wire fixing seat block 121 and the opposite side of the aforementioned guide slider connecting block 313, and the aforementioned protector pin electrical connection wire fixing seat 211 is embedded in the aforementioned electrical connection wire fixing seat cavity 1211.

[0035] See you next time Figure 1 The aforementioned protector pin locking cover 32 is constituted with a locking cover cavity 321 that runs through from the front end to the rear end, the locking cover cavity left cavity wall 3211 of the locking cover cavity 321 is inserted and matched with the aforementioned locking cover left guide slider 311, and the locking cover cavity right cavity wall 3212 of the locking cover cavity 321 is inserted and matched with the aforementioned locking cover right guide slider 312, and a protector pin locking cavity 32131 is constituted at the center position of the locking cover cavity top wall 3213 of the locking cover cavity 321, and the aforementioned protector pin 21 is matched with the protector pin locking cavity 32131.

[0036] Depend on Figure 1 As shown, the entire protector pin locking cover 32 is in the shape of an arch.

[0037] A left cavity wall insert strip 32111 is formed at the lower part of the left cavity wall 3211 of the aforementioned locking cover cavity in the length direction, and a locking cover left guide slider mating groove 32112 is formed at the position above the left cavity wall insert strip 32111 in the length direction, and a right cavity wall insert strip 32121 is formed at the lower part of the right cavity wall 3212 of the aforementioned locking cover cavity in the length direction, and a locking cover right guide slider mating groove 32122 is formed at the position above the right cavity wall insert strip 32121 in the length direction, the left cavity wall insert strip 32111 is inserted and matched with the aforementioned locking cover left insert space 3111, the aforementioned locking cover left guide slider 311 is inserted and matched with the aforementioned locking cover left guide slider mating groove 32112, the right cavity wall insert strip 32121 is inserted and matched with the aforementioned locking cover right insert space 3121, and the aforementioned locking cover right guide slider 312 is inserted and matched with the aforementioned locking cover right guide slider mating groove 32122.

[0038] The protector pin 21, S pin 11a and M pin 11b are connected to the Figure 2 The three-wire posts on the three-wire post seat 41 of the refrigeration compressor 4 shown in the figure correspond to each other and are plugged into each other. The three-wire post seat 41 is arranged on the motor starter protector mounting bracket 411 ( Figure 2 As shown in the figure, the protector pin 21, the S pin 11a and the M pin 11b form a triangular distribution relationship with each other; the aforementioned triangle is an isosceles triangle.

[0039] In this embodiment, the current starter cover plate 12 and the protector pin support seat 31 are both molded from plastic to form an integral structure. However, if the current starter cover plate 12 and the protector pin support seat 31 are molded from plastic separately for the purpose of circumventing the present invention, and then the protector pin support seat 31 is fixed to the current starter cover plate 12 by bonding, it should be regarded as an equivalent change in form rather than in substance, and still falls within the scope of the technical connotation disclosed by the present invention.

[0040] See also Figure 2 And combined with Figure 1According to professional common sense, the moving contact connection part 22 (also called moving contact pin, see CN100356652C) of the protector 2 is electrically connected to the aforementioned protector pin electrical connection wire fixing seat 211 by the electrical transition connection wire 221. After the aforementioned protector pin 21 is supported on the aforementioned protector pin support seat 31, more specifically, the aforementioned protector pin neck 212 is matched with the protector pin neck accommodating cavity 3131, and the protector pin electrical connection wire fixing seat 211 is embedded in the electrical connection wire fixing seat cavity 1211, so that the protector pin 21 is located in the aforementioned protector pin accommodating cavity 314, and then the protector pin locking cover 32 is inserted and matched with the protector pin support seat 31. Specifically, the left cavity wall insert strip 32111 and the right cavity wall insert strip 32121 are respectively inserted and matched with the left insertion space 3111 and the right insertion space 3121 of the locking cover. At the same time, the left and right guide slide blocks 311 and 312 of the locking cover are respectively inserted and matched with the left and right guide slide block matching grooves 32112 and 32122 of the locking cover, so that the protector pin locking cover 32 can reliably lock the protector pin 21. Then press Figure 2 The protector pin 21, S pin 11a and M pin 11b are simultaneously mated with the aforementioned three-wire column in the direction shown. Figure 2 The tightening spring 5 (also called "clip spring") provided with the motor starter protector mounting bracket 411 as a carrier is tightened to make the protector 2 close to the refrigeration compressor 4, and the protector 2 and the refrigeration compressor 4 can also be fixed by adhesive. When the adhesive is used, it is preferred to apply the adhesive only to the peripheral edge of the protector 2 facing the refrigeration compressor 4 to avoid affecting the heat transfer effect.

[0041] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A combined structure of a current starter and a protector, comprising a current starter (1) and a protector (2), wherein the current starter (1) has an S pin (11a) and an M pin (11b), and the protector (2) has a protector pin (21), characterized in that: The invention also comprises an integrated installation mechanism (3), the integrated installation mechanism (3) comprising a protector pin support seat (31) and a protector pin locking cover (32), the protector pin support seat (31) being located on the upper side of the current starter cover plate (12) of the current starter (1) and corresponding to the upper part of the S pin (11a) and the M pin (11b) across the current starter cover plate (12), the protector pin (21) being supported on the protector pin support seat (31) and corresponding to the upper part between the S pin (11a) and the M pin (11b), the protector pin locking cover (32) being inserted and matched with the protector pin support seat (31) at a position corresponding to the upper part of the protector pin (21) to lock the protector pin (21) on the protector pin support seat (31).

2. The combined structure of the current starter and the protector according to claim 1 is characterized in that: The protector pin support seat (31) is located at the center of the side of the front end of the current starter cover plate (12) facing upwards, a left guide slider (311) of a locking cover is formed on the left side of the protector pin support seat (31), and a right guide slider (312) of a locking cover is formed on the right side of the protector pin support seat (31), and a guide slider connecting block (313) is formed at the rear edge of the protector pin support seat (31), the left guide slider (311) of the locking cover and the right guide slider (312) of the locking cover correspond to each other on the left and right, and the guide slider connecting block (313) is connected to the rear ends of the left and right guide sliders (311, 312) of the locking cover, and the left and right guide sliders (311, 312) of the locking cover and the guide slider connecting block (313) are connected to the side facing each other. The slider connecting block (313) protrudes from the upper surface of the protector pin support seat (31) and together form a stack edge in the shape of a letter "]", and the space in the area of ​​the letter "] forms a protector pin accommodating chamber (314); the protector pin (21) passes through the guide slider connecting block (313) and corresponds to the upper part between the S pin (11a) and the M pin (11)b of the current starter (1) when accommodated in the protector pin accommodating chamber (314); the protector pin locking cover (32) is simultaneously engaged with the locking cover left guide slider (311) and the locking cover right guide slider (312) to lock the protector pin (21) in the protector pin accommodating chamber (314).

3. The combined structure of the current starter and the protector according to claim 2 is characterized in that: A left locking cover insertion space (3111) is formed between the bottom surface of the left guide slider (311) of the locking cover in the length direction and the upper surface of the current starter cover (12), and a right locking cover insertion space (3121) is formed between the bottom surface of the right guide slider (312) of the locking cover in the length direction and the upper surface of the current starter cover (12). The protector pin locking cover (32) is simultaneously inserted and matched with the left locking cover insertion space (3111) and the right locking cover insertion space (3121) to lock the protector pin (21) in the protector pin accommodating cavity (314), and the front end faces of the protector pin (21) and the S pin (11a) and the M pin (11b) are located on the same longitudinal plane.

4. The combined structure of the current starter and the protector according to claim 2 is characterized in that: A protector pin neck accommodating cavity (3131) is formed on the upper side of the guide slider connection block (313) and located in the middle of the guide slider connection block (313) in the length direction. The protector pin (21) has a protector pin electrical connection line fixing seat (211). A protector pin neck (212) is formed between the protector pin electrical connection line fixing seat (211) and the protector pin (21). The protector pin neck (212) is supported in the protector pin neck accommodating cavity (3131).

5. The combined structure of the current starter and the protector according to claim 4 is characterized in that: A protector pin electrical connection wire fixing seat block (121) extends upwardly in a state perpendicular to the current starter cover plate (12) at a position at the rear of the middle part of the length direction of the guide slider connecting block (313) on the upward side of the current starter cover plate (12), and an electrical connection wire fixing seat cavity (1211) is maintained between the protector pin electrical connection wire fixing seat block (121) and the opposite side of the guide slider connecting block (313), and the protector pin electrical connection wire fixing seat (211) is embedded in the electrical connection wire fixing seat cavity (1211).

6. The combined structure of the current starter and the protector according to claim 3 is characterized in that: The protector pin locking cover (32) is formed with a locking cover cavity (321) extending from the front end to the rear end. The left cavity wall (3211) of the locking cover cavity (321) is inserted and matched with the left guide slide block (311) of the locking cover, and the right cavity wall (3212) of the locking cover cavity (321) is inserted and matched with the right guide slide block (312) of the locking cover cavity. A protector pin locking cavity (32131) is formed at the center of the locking cover cavity top wall (3213) of the locking cover cavity (321), and the protector pin (21) is matched with the protector pin locking cavity (32131).

7. The combined structure of the current starter and the protector according to claim 6, characterized in that: A left cavity wall insert strip (32111) is formed at the lower part of the left cavity wall (3211) of the locking cover cavity in the longitudinal direction, and a locking cover left guide slider insert groove (32112) is formed at the upper part of the left cavity wall insert strip (32111) in the longitudinal direction, a right cavity wall insert strip (32121) is formed at the lower part of the right cavity wall (3212) of the locking cover cavity in the longitudinal direction, and a right cavity wall insert strip (32121) is formed at the upper part of the right cavity wall insert strip (32121) in the longitudinal direction. A locking cover right guide slider fitting groove (32122), a left cavity wall insert strip (32111) is inserted and matched with the locking cover left insert space (3111), the locking cover left guide slider (311) is inserted and matched with the locking cover left guide slider fitting groove (32112), the right cavity wall insert strip (32121) is inserted and matched with the locking cover right insert space (3121), and the locking cover right guide slider (312) is inserted and matched with the locking cover right guide slider matching groove (32122).

8. The combined structure of the current starter and the protector according to claim 1, 2 or 3, characterized in that: The protector pin (21), S pin (11a) and M pin (11b) correspond to and are plugged into the three-wire column of the refrigeration compressor. The protector pin (21), S pin (11a) and M pin (11b) form a triangular distribution relationship; the triangle is an isosceles triangle.

9. The combined structure of the current starter and the protector according to claim 1, characterized in that: The current starter cover plate (12) and the protector pin support seat (31) are both formed by plastic molding into an integrated structure.

10. The combined structure of the current starter and the protector according to claim 1, characterized in that: After the current starter cover plate (12) and the protector pin support seat (31) are respectively formed by plastic, the protector pin support seat (31) is fixed to the current starter cover plate (12) by gluing.

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