Motor starter with function of abutting against and matching with three-wire column of refrigeration compressor

Abstract

The utility model discloses a motor starter with a function of abutting against and matching with three wire columns of a refrigeration compressor, and belongs to the technical field of refrigeration compressor motor starting devices. Comprising a shell and a cover plate, the cover plate is fixed with an upward opening part of the shell, and a cavity opening of a shell cavity of the shell is sealed by the cover plate; an S pin groove and an M pin groove which are used for enabling the S pin and the M pin to be communicated with the outside and matched with a three-wire column of the refrigeration compressor in an inserted mode are formed in the positions, corresponding to the S pin and the M pin arranged in a shell cavity, of the front end of the shell, and the structure is characterized in that a first three-wire column abutting claw is formed in the position, corresponding to the upper portion of the S pin groove, of the front end of the cover plate; and a second three-wire column abutting claw is formed at a position corresponding to the upper part of the M pin slot. The utility model has the advantages that the S pin and the M pin can be reliably inserted into the three-wire column, and the S pin and the M pin can be prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration compressor motor starting devices, in particular to a motor starter with the function of tightly matching with a three-wire column of a refrigeration compressor. Background Art

[0002] As is well known in the industry, refrigeration compressor motor starters, whether using a positive temperature coefficient thermistor (PTC) or negative temperature coefficient thermistor (NTC) structure, feature an M pin and an S pin for connecting to an external AC power source. Taking a deadweight starter as an example, the M pin connects to the motor's primary winding and controls the motor's starting and operation. In a motor starter, the M pin connects to an external AC power source to provide the required current to the motor, ensuring a smooth start and normal operation. The S pin, connected to the motor's secondary winding, primarily provides auxiliary current during startup, helping the motor overcome resistance and ensuring a smooth start, thus avoiding starting difficulties or failures.

[0003] In the public Chinese patent literature, there is no shortage of technical information on refrigeration compressor motor starters, such as CN201674445U (electronic starter for refrigeration compressor), CN2307936Y (refrigeration compressor motor starter), CN203608121U (a refrigeration compressor starter), CN207612210U (refrigeration compressor motor starter), CN2733039Y (a fully enclosed hammer starter for R600a working fluid refrigeration compressor), CN202906801U (a hammer starter with improved sealing performance) and CN106452193A (structurally improved hammer current starter), etc.

[0004] The common structure of the refrigeration compressor motor starter mentioned above is not limited to the above-mentioned hammer type starter. Figure 4 As shown, it comprises a housing 1 and a cover plate 2, the cover plate 2 is fixed to the open portion of the housing 1 facing upwards by rivets 21, so that the cover plate 2 closes the opening of the housing cavity of the housing 1. Figure 4 The figure also shows a double plug 3, C pin 4, M pin 5, S pin connecting piece 6, connecting plug 7 and coil 8. Inside the housing cavity of the housing 1 are arranged various components not shown in the figure, such as a moving contact piece with a moving contact (also called a "moving contact"), a stationary contact (also called a "stationary contact") provided with the connecting plug 7 as a carrier, a spring, an armature, a push rod (also called a "copper tube"), etc. Figure 4 The overall structure, functions of each component and overall working principle shown have been fully described in the aforementioned CN202906801U, so the applicant will not repeat them here.

[0005] The applicant needs to state: Figure 4 Although the present invention relates to a hammer type starter suitable for commercial refrigeration compressors, it has many common components with starters of refrigeration compressors with similar uses.

[0006] by Figure 4 The weight-type starter represented by the structure shown has the following common drawbacks: Because there is a large space between the front end face of the S pin 4 and the notch of the S pin slot 12 formed at the front end of the housing 1 (the notch and the front end face of the housing 1 are coplanar, hereinafter the same), and between the front end face of the M pin 5 and the notch of the M pin slot 13 formed at the front end of the housing 1, respectively, for mating with the three-wire stud of the refrigeration compressor, and because there are no components corresponding to these spaces to control the three-wire stud, in actual use, that is, when the refrigeration compressor is in operation, the three-wire stud has sufficient space to vibrate vertically. This vertical vibration of the three-wire stud can damage the S pin 4 and the M pin 5. Over time, this can cause gaps to form between the pin holes of the S pin 4 and the M pin 5 and the three-wire stud, leading to loosening, thereby impairing the mating effect of the three-wire stud with the S pin 4 and the M pin 5. In serious cases, poor electrical contact can cause safety hazards such as fire. Therefore, it is necessary to make improvements, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0007] The utility model aims to provide a motor starter which can effectively control the tripod in use to avoid the tripod from vibrating up and down and ensure safety and has the function of tightly fitting with the tripod of a refrigeration compressor.

[0008] The task of the present utility model is accomplished in this way. A motor starter with a function of abutting and fitting with a three-wire column of a refrigeration compressor comprises a housing and a cover plate. The cover plate is fixed to an upwardly open portion of the housing by rivets. The cover plate seals the opening of the housing cavity of the housing. An S pin slot and an M pin slot are formed at the front end of the housing and corresponding to the positions of the S pin and the M pin provided in the housing cavity, for allowing the S pin and the M pin to communicate with the outside world and to fit with the three-wire column of the refrigeration compressor. The utility model is characterized in that a first three-wire column abutting claw is formed at the front end of the cover plate and at a position corresponding to the upper portion of the S pin slot, and a second three-wire column abutting claw is formed at a position corresponding to the upper portion of the M pin slot.

[0009] In the present invention, the first three-wire column abutting claw corresponds to the upper part of the S pin slot notch of the S pin slot, and the second three-wire column abutting claw corresponds to the upper part of the M pin slot notch of the M pin slot.

[0010] In the present invention, the first and second three-wire column abutting claws respectively correspond to the upper part of the front end surfaces of the S and M pins and respectively maintain a distance from the upper part of the front end surfaces of the S and M pins.

[0011] In the present invention, the first three-wire column clamping claw extends toward the S pin slot at the front end surface of the cover plate through the first three-wire column clamping claw transition section to form an integral structure with the cover plate, and the second three-wire column clamping claw extends toward the M pin slot at the front end surface of the cover plate through the second three-wire column clamping claw transition section to form an integral structure with the cover plate.

[0012] In the present invention, the first three-wire column abutting claw and the second three-wire column abutting claw form a vertical relationship with the cover plate.

[0013] In the present invention, an S-pin holding flange is formed at the front end of the cover plate facing the side of the housing cavity and at a position corresponding to the S-pin, and an M-pin holding flange is formed at a position corresponding to the M-pin. The S-pin holding flange contacts the S-pin, and the M-pin holding flange contacts the M-pin.

[0014] In the present invention, a negative temperature coefficient thermistor limit stopper protrudes from the upper surface of the cover plate and extends from the upper side of the cover plate.

[0015] In the present invention, the housing and the cover are plastic housing and plastic cover.

[0016] The technical effect of the technical solution provided by the present invention is that: since a first three-wire post clamping claw is formed at the front end of the cover plate and at a position corresponding to the upper side of the S pin slot, and a second three-wire post clamping claw is formed at a position corresponding to the upper side of the M pin slot, when in use, after the S pin and the M pin are mated with the three-wire post of the refrigeration compressor, the first and second three-wire post clamping claws can respectively compensate for the redundant space of the S pin slot and the M pin slot and clamp the three-wire post, thereby preventing the three-wire post from vibrating up and down, so as to maintain a reliable mating effect between the S pin and the M pin and the three-wire post, and avoid damage to the S pin and the M pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the bottom view of the cover shown;

[0019] Figure 3 This is a structural diagram of another embodiment of the present utility model;

[0020] Figure 4 It is a structural diagram of a heavy hammer starter in the prior art. DETAILED DESCRIPTION

[0021] 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 does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on Figure 1 The position states shown are for example only and should not be understood as a special limitation on the technical solution provided by the present invention.

[0023] See Figure 1 This embodiment takes a heavy hammer starter as an example, that is, Figure 1 and Figure 3 The starters of the shown structures are all weight-hammer type starters. However, if, in order to circumvent the purpose of the present invention, the ordinary non-weight-hammer type refrigeration compressor motor starters with other similar uses are changed in form to also play the role of tightening the three-wire column, then it should also be regarded as the scope of the technical connotation disclosed by the present invention.

[0024] Figure 1 The figure shows a housing 1 and a cover plate 2. The cover plate 2 is fixed to the upwardly open portion of the housing 1 by rivets 21. The cover plate 2 seals the opening of the housing cavity of the housing 1. At the front end of the housing 1 and corresponding to the positions of the S pin 4 and the M pin 5 provided in the housing cavity, there are formed S pin slots 12 and M pin slots 13 for the S pins 4 and the M pin 5 to communicate with the outside world and to mate with two of the three-wire poles of the refrigeration compressor (the other pole is for the protector to mate with it).

[0025] The technical key points of the technical solution provided by the present invention are as follows: a first three-wire column clamping claw 22 is formed at the front end of the aforementioned cover plate 2 and at a position corresponding to the upper side of the aforementioned S pin slot 12, and a second three-wire column clamping claw 23 is formed at a position corresponding to the upper side of the aforementioned M pin slot 13.

[0026] exist Figure 1Also shown are the double plug 3, the S-pin connecting piece 6, the connecting plug 7 and the coil 8. Since the functions, mutual connection relationships and overall working principles of these components and the movable contact piece with a movable contact (also called "moving contact"), the static contact (also called "static contact") provided with the connecting plug 7 as a carrier, the spring, the armature, the ejector rod (also called "copper tube"), etc. arranged in the housing cavity of the housing 1 are all existing technologies, for example, refer to CN202906801U, the applicant will not elaborate on them.

[0027] As a preferred solution, the first three-wire column clamping claw 22 corresponds to the upper part of the S pin slot notch of the S pin slot 12 , and the second three-wire column clamping claw 23 corresponds to the upper part of the M pin slot notch of the M pin slot 13 .

[0028] The first and second tripod abutting claws 22 and 23 correspond to the upper ends of the front end surfaces of the S and M pins 4 and 5 respectively and maintain a distance from the upper ends of the front end surfaces of the S and M pins 4 and 5 respectively.

[0029] In this embodiment, the aforementioned first three-wire post clamping claw 22 extends toward the aforementioned S pin slot 12 at the front end surface of the aforementioned cover plate 2 through the first three-wire post clamping claw transition section 221 to form an integral structure with the cover plate 2, and the aforementioned second three-wire post clamping claw 23 extends toward the aforementioned M pin slot 13 at the front end surface of the cover plate 2 through the second three-wire post clamping claw transition section 231 to form an integral structure with the cover plate 2.

[0030] In this embodiment, the first three-wire column abutting claw 22 and the second three-wire column abutting claw 23 are perpendicular to the cover plate 2, and the front side surfaces of the first and second three-wire column abutting claws 22 and 23 are in the same plane as the front outer surface of the shell 2.

[0031] See Figure 2 On the front end of the cover plate 2, facing the housing cavity, an S-pin retaining flange 24 is formed at a position corresponding to the S-pin 4, while an M-pin retaining flange 25 is formed at a position corresponding to the M-pin 5. The S-pin retaining flange 24 contacts the S-pin 4, while the M-pin retaining flange 25 contacts the M-pin 5. Specifically, the presence of the S-pin retaining flange 24 and the M-pin retaining flange 25 at the positions corresponding to the S-pin 4 and the M-pin 5, respectively, on the cover plate 2 effectively locks the S-pin 4 and the M-pin 5 in place (i.e., "locks" the position).

[0032] See Figure 3As another embodiment, a negative temperature coefficient thermistor stopper 26 is extended from the upper side of the cover plate 2. Figure 3 A negative temperature coefficient thermistor 9 is also shown in the figure. Since the function of the negative temperature coefficient thermistor 9 belongs to the well-known technology, the applicant will not explain it again.

[0033] In this embodiment, the housing 1 and the cover 2 are plastic housings and plastic cover.

[0034] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A motor starter having a function of tightly fitting with a three-wire column of a refrigeration compressor, comprising a housing (1) and a cover plate (2), wherein the cover plate (2) is fixed to an upwardly open portion of the housing (1) by means of rivets (21), and the cover plate (2) seals the opening of the housing cavity of the housing (1), and an S pin slot (12) and an M pin slot (13) are formed at the front end of the housing (1) and corresponding to the positions of the S pin (4) and the M pin (5) provided in the housing cavity for allowing the S pin (4) and the M pin (5) to communicate with the outside and to fit with the three-wire column of the refrigeration compressor, characterized in that: A first three-wire column abutting claw (22) is formed at the front end of the cover plate (2) and at a position corresponding to the upper side of the S pin slot (12), and a second three-wire column abutting claw (23) is formed at a position corresponding to the upper side of the M pin slot (13).

2. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 1, characterized in that: The first three-wire column abutting claw (22) corresponds to the upper portion of the S pin slot notch of the S pin slot (12), and the second three-wire column abutting claw (23) corresponds to the upper portion of the M pin slot notch of the M pin slot (13).

3. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 1, characterized in that: The first and second three-wire column abutting claws (22, 23) respectively correspond to the upper part of the front end surfaces of the S and M pins (4, 5) and respectively maintain a distance from the upper part of the front end surfaces of the S and M pins (4, 5).

4. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 2 or 3, characterized in that: The first three-wire column abutting claw (22) extends at the front end surface of the cover plate (2) in the direction of the S pin slot (12) through a first three-wire column abutting claw transition section (221) to form an integral structure with the cover plate (2); the second three-wire column abutting claw (23) extends at the front end surface of the cover plate (2) in the direction of the M pin slot (13) through a second three-wire column abutting claw transition section (231) to form an integral structure with the cover plate (2).

5. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 4, characterized in that: The first three-wire column abutting claw (22) and the second three-wire column abutting claw (23) form a vertical relationship with the cover plate (2).

6. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 1, characterized in that: An S-pin retaining flange (24) is formed at the front end of the cover plate (2) facing the side of the housing cavity and at a position corresponding to the S-pin (4), and an M-pin retaining flange (25) is formed at a position corresponding to the M-pin (5). The S-pin retaining flange (24) contacts the S-pin (4), and the M-pin retaining flange (25) contacts the M-pin (5).

7. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 1, characterized in that: A negative temperature coefficient thermistor limit stopper (26) protrudes from the upper surface of the cover plate (2) and extends from the upper side of the cover plate (2).

8. The motor starter having the function of tightly fitting with the three-wire column of the refrigeration compressor according to claim 1, characterized in that: The shell (1) and the cover plate (2) are plastic shells and plastic cover plates.

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