Counter weight starter with current limiting function

Abstract

The utility model relates to a counter weight starter with a current limiting function, which is mainly used for starting a compressor motor and can also be used for starting a common single-phase alternating current motor. The circuit breaker comprises a cover plate, a connecting insertion sheet, a first pin, a second pin, a machine core assembly, a coil and a framework, the connecting insertion sheet, the first pin, the second pin and the machine core assembly are all installed in the framework, the cover plate covers the framework, the coil is wound outside the framework, and the circuit breaker is structurally characterized by further comprising a duplex insertion sheet and a CS starting capacitor, the duplex insertion piece is installed on the framework, the connecting insertion piece and the first insertion pin are both matched with the machine core assembly, the machine core assembly is matched with the coil, the head end of the coil is connected with the second insertion pin, the tail end of the coil is connected with the duplex insertion piece, one end of the CS starting capacitor is connected with the connecting insertion piece, and the other end of the CS starting capacitor is connected with the second insertion pin. And the other end of the CS starting capacitor is connected with the duplex insertion piece connecting end of the duplex insertion piece.

Description

Technical Field

[0001] The utility model relates to a heavy hammer starter with a current limiting function, which is mainly used for starting a compressor motor and can also be used for starting a general single-phase AC motor. Background Art

[0002] Most refrigeration compressors use split-phase single-phase asynchronous motors, and two sets of windings are set on the stator core, namely the main winding and the auxiliary winding. After power is turned on, the main and auxiliary magnetic fields generated by the main and auxiliary windings form a rotating magnetic field due to the phase difference. The rotating magnetic field cuts the stationary rotor to generate electromagnetic torque, causing the rotor to start rotating. The rotor torque will gradually increase after starting. When the speed reaches 75%-80% of the synchronous speed, the auxiliary winding loop is cut off. At this time, under the action of the main magnetic field, the motor can continue to increase speed until it reaches a balance with the external impedance and stable operation. At present, thermistors, namely PTC starters, are usually used to complete the starting process. PTC starters are connected in series in the auxiliary winding loop of the refrigeration compressor motor. The PTC starter is in a low-resistance conduction state at room temperature. During starting, the PTC element heats up rapidly due to the action of the current. When the Curie temperature point is reached, its resistance value increases rapidly to more than tens of kilo-ohms, and the current in the auxiliary winding loop drops to less than ten milliamperes, which is close to the open circuit state. The motor starting process is completed and enters normal operation. In addition, a thermal protector is connected in series on the main circuit of the refrigeration compressor. When the refrigeration compressor motor overcurrents or overheats due to external reasons or refrigeration system failure, the thermal protector will operate, thereby cutting off the power supply to protect the compressor motor.

[0003] However, the starting current of the refrigeration compressor used in commercial refrigeration units is relatively large, and the maximum current passing through the secondary winding can reach 20A. Due to the limitations of the use range of PTC starters, heavy hammer starters are generally used as starting elements. The moving and static contacts of heavy hammer starters have large current carrying capacity and are widely used in the field of commercial machines. Figure 1 , Figure 2 As shown, the heavy hammer starter in the prior art has the following deficiencies in actual use due to the limitations of the structural design: 1. There is no starting capacitor connection terminal, and the starting capacitor cannot be connected in the contact circuit to improve the starting characteristics of the compressor; 2. There is no running capacitor connection terminal, and the moving capacitor cannot be connected to improve the operating efficiency of the compressor; 3. Since the maximum current of the compressor auxiliary winding can reach 20A, it is easy to burn out the compressor auxiliary winding. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a heavy hammer starter with a reasonable structural design and a current limiting function.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the heavy hammer starter with current limiting function includes a cover plate, a connecting plug, a first pin, a second pin, a movement component, a coil and a frame, the connecting plug, the first pin, the second pin and the movement component are all installed in the frame, the cover plate covers the frame, and the coil is wound outside the frame. Its structural characteristics are: it also includes a double plug and a CS starting capacitor, the double plug is installed on the frame, the connecting plug and the first pin are both matched with the movement component, the movement component is matched with the coil, the head end of the coil is connected to the second pin, the tail end of the coil is connected to the double plug, one end of the CS starting capacitor is connected to the connecting plug, and the other end of the CS starting capacitor is connected to the double plug connection end of the double plug.

[0006] Furthermore, it also includes a CR running capacitor, one end of which is connected to the running capacitor connecting end of the first plug pin, and the other end of which is connected to the double plug connecting end of the double plug.

[0007] Furthermore, it also includes an NTC thermistor and a U-shaped connecting piece, wherein the first connecting end of the NTC thermistor is connected to the double-plug connecting end, the second connecting end of the NTC thermistor is connected to the U-shaped connecting piece, and the U-shaped connecting piece starting capacitor connecting end of the U-shaped connecting piece is connected to the other end of the CS starting capacitor.

[0008] Furthermore, the cover plate is mounted on the frame by fixing screws.

[0009] Further, the first pin is connected to the S end of the compressor, the second pin is connected to the M end of the compressor, and the C end of the compressor is connected to the thermal protector.

[0010] Compared with the prior art, the utility model has the following advantages: the heavy hammer starter can be connected to a starting capacitor or can be connected to a starting capacitor and a running capacitor at the same time, thereby limiting the current of the compressor auxiliary winding, as follows:

[0011] 1. By setting up double plugs and double plug connection terminals, the CS starting capacitor can be connected in the contact circuit, thereby achieving the purpose of improving the starting characteristics of the compressor.

[0012] 2. The running capacitor connection terminal, the double plug and the double plug connection terminal are set, which can connect the CS starting capacitor in the contact circuit and connect the CR running capacitor at the output end of the main winding M and the auxiliary winding M, so as to improve the starting characteristics of the compressor and the operating efficiency of the compressor.

[0013] 3. An NTC thermistor, a running capacitor connection terminal, a double plug, a double plug connection terminal and a U-shaped connecting piece are provided, which can not only connect the CS starting capacitor in the contact circuit, but also limit the instantaneous large current in the contact circuit, and can also connect the CR running capacitor at the output end of the main winding M and the auxiliary winding M, thereby achieving the purpose of improving the compressor starting characteristics, the compressor operating efficiency and the life of the compressor auxiliary winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a heavy hammer starting relay in the prior art.

[0015] Figure 2 The utility model is a wiring diagram of the electrical principle of a heavy hammer starting relay in the prior art.

[0016] Figure 3 It is a schematic diagram of the explosion structure of the heavy hammer starter of Example 1 of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the heavy hammer starter of Example 1 of the utility model.

[0018] Figure 5 It is a schematic diagram of the electrical principle wiring of the heavy hammer starter of Example 1 of the utility model.

[0019] Figure 6 It is a schematic diagram of the explosion structure of the heavy hammer starter of Example 2 of the utility model.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the heavy hammer starter of Example 2 of the utility model.

[0021] Figure 8 It is a schematic diagram of the electrical principle wiring of the heavy hammer starter of Example 2 of the utility model.

[0022] Fig. 9 It is a schematic diagram of the explosion structure of the heavy hammer starter of Example 3 of the utility model.

[0023] Fig.10 It is a schematic diagram of the three-dimensional structure of the heavy hammer starter of Example 3 of the utility model.

[0024] Fig.11 This is a schematic diagram of the electrical principle wiring of the heavy hammer starter of Example 3 of the utility model;

[0025] Fig.12 It is a schematic diagram of the three-dimensional structure of the first pin of Embodiments 2 and 3 of the present utility model.

[0026] Fig.13 It is a schematic diagram of the three-dimensional structure of the second pins of Embodiments 1, 2, and 3 of the utility model.

[0027] Fig.14 It is a schematic diagram of the three-dimensional structure of the double-jointed plugs of embodiments 1, 2 and 3 of the present utility model.

[0028] Fig.15 It is a schematic diagram of the three-dimensional structure of the U-shaped connecting piece of Example 3 of the utility model.

[0029] Fig.16 It is a schematic diagram of the three-dimensional structure of the NTC thermistor of Example 3 of the utility model.

[0030] In the figure: fixing screw 1, NTC thermistor 2, cover 3, connecting plug 4, first pin 5, second pin 6, double plug 7, U-shaped connecting piece 8, movement assembly 9, coil 10, frame 11, CS starting capacitor 12, CR running capacitor 13, compressor MY, thermal protector OLP,

[0031] NTC thermistor first connection terminal 2-1, NTC thermistor second connection terminal (2-2),

[0032] Running capacitor connection terminal 5-1,

[0033] Second pin positioning groove 6-1,

[0034] Double plug positioning slot 7-1, double plug connection end 7-2, double plug limit end 7-3, double plug welding end 7-4,

[0035] U-shaped connecting piece positioning groove 8-1, U-shaped connecting piece starting capacitor connection end 8-2,

[0036] Movement component mounting cavity 11-1, first pin mounting cavity 11-2, second pin mounting cavity 11-3, connecting plug mounting cavity 11-4, double plug mounting cavity 11-5, first pin connecting end mounting cavity 11-6, U-shaped connecting piece mounting cavity 11-7, double plug positioning groove 11-8, first pin positioning column 11-9. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0038] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0039] Example 1 (such as Figure 3-5 , as shown in 13-14).

[0040] The heavy hammer starter with current limiting function in this embodiment includes a cover plate 3, a connecting plug 4, a first pin 5, a second pin 6, a double plug 7, a movement component 9, a coil 10, a skeleton 11 and a CS starting capacitor 12. The connecting plug 4, the first pin 5, the second pin 6 and the movement component 9 are all installed in the skeleton 11, the cover plate 3 is covered on the skeleton 11 by a fixing screw 1, the coil 10 is wound around the outside of the skeleton 11, the first pin 5 is connected to the S end of the compressor MY, the second pin 6 is connected to the M end of the compressor MY, and the C end of the compressor MY is connected to the thermal protector OLP.

[0041] The double plug 7 in this embodiment is installed on the skeleton 11, the connecting plug 4 and the first pin 5 are both matched with the movement component 9, the movement component 9 is matched with the coil 10, the head end of the coil 10 is connected to the second pin 6, the tail end of the coil 10 is connected to the double plug 7, one end of the CS starting capacitor 12 is connected to the connecting plug 4, and the other end of the CS starting capacitor 12 is connected to the double plug connection end 7-2 of the double plug 7.

[0042] Specifically, the basic principle of the weight starter in this embodiment is similar to that of the prior art, and the parts with the same structure are not described again. The weight starter includes a fixing screw 1, a cover plate 3, a connecting plug 4, a first plug pin 5, a second plug pin 6, a double plug pin 7, a core assembly 9, a coil 10 and a frame 11, etc. The second plug pin 6 is provided with a second plug pin positioning groove 6-1, the double plug pin positioning groove 7-1, the double plug pin connecting end 7-2, the double plug pin limiting end 7-3 and the double plug pin welding end 7-4 are provided on the double plug pin 7, and the core assembly installation cavity 11-1, the first plug pin installation cavity 11-2, the second plug pin installation cavity 11-3, the second plug pin installation cavity 11-4, the second plug pin installation cavity 11-5, the second plug pin installation cavity 11-6, the second plug pin installation cavity 11-7, the second plug pin installation cavity 11-8, the second plug pin installation cavity 11-9, the second plug pin installation cavity 11-1, the second plug pin installation cavity 11-1, the second plug pin installation cavity 11-2, the second plug pin installation cavity 11-3, the second plug pin installation cavity 11-4, the second plug pin installation cavity 11-5, the second plug pin installation cavity 11-6, the second plug pin installation cavity 11-7, the second plug pin installation cavity 11-8, the second plug pin installation cavity 11-9, the second plug pin installation cavity 11-1, the second plug pin installation cavity 11-2, the second plug pin installation cavity 11-3, the second plug pin installation cavity 11-4, the second plug pin installation cavity 11-5, the second plug pin installation cavity 11-6, the second plug pin installation cavity 11-1, the second plug pin installation cavity 11-2, the second plug pin installation cavity 11-3, the second plug pin The foot mounting cavity 11-3, the connecting plug mounting cavity 11-4, the double plug mounting cavity 11-5 and the double plug positioning groove 11-8, the movement component 9, the first pin 5, the second pin 6, the connecting plug 4, and the double plug 7 are placed in the corresponding mounting cavities in sequence, and the cover 3 is closed. Finally, the cover 3 and the frame 11 are fixedly connected with the fixing screws 1, the head end of the coil 10 is connected to the second pin 6 by spot welding, and the tail end of the coil 10 is connected to the double plug 7 by spot welding, thereby forming the heavy hammer starter.

[0043] See also Figure 5 The weight starter is connected to the M end of the compressor MY through the second pin 6 and the S end of the compressor MY through the first pin 5, and is directly plugged into the sealed terminal of the compressor MY. In order to improve the starting performance of the compressor motor, one end of the CS starting capacitor 12 is connected to the connecting plug 4, and the other end of the CS starting capacitor 12 is connected to the double plug connection end 7-2. At this time, the CS starting capacitor 12 and the weight starter contact system form an energized circuit. Before the compressor MY is powered on, the contact system of the heavy hammer starter is in the normally open state. When the compressor motor starts, the starting current of the main winding is large, the contact system is energized, and the auxiliary winding of the compressor is instantly connected, so that the compressor motor runs quickly. As the speed of the compressor MY continues to rise, the current of the main winding drops rapidly, and the contact system is released and disconnected, so that the compressor motor enters the running state; after the thermal protector OLP and the heavy hammer starter are inserted into the sealed terminal of the compressor, the neutral line of the power supply forms the main winding power-on circuit through the double plug 7, the coil 10 and the second pin 6; the connection terminal of the thermal protector OLP is connected to the live line of the power supply, so that the thermal protector OLP is connected in series in the compressor motor circuit. When the grid voltage is too high or the refrigeration system fails, the thermal protector OLP is activated, thereby cutting off the power supply to protect the compressor motor.

[0044] The double plug connection terminal 7-2 is provided on the double plug 7, and the CS starting capacitor 12 can be connected in the contact loop, thereby achieving the purpose of improving the starting characteristics of the compressor MY.

[0045] Example 2 (such as Figure 6-8 , 12-14).

[0046] The heavy hammer starter with current limiting function in this embodiment includes a cover plate 3, a connecting plug 4, a first pin 5, a second pin 6, a double plug 7, a movement assembly 9, a coil 10, a frame 11, a CS starting capacitor 12 and a CR running capacitor 13. The connecting plug 4, the first pin 5, the second pin 6 and the movement assembly 9 are all installed in the frame 11, the cover plate 3 is covered on the frame 11 by a fixing screw 1, the coil 10 is wound around the outside of the frame 11, the first pin 5 is connected to the S end of the compressor MY, the second pin 6 is connected to the M end of the compressor MY, and the C end of the compressor MY is connected to the thermal protector OLP.

[0047] The double plug 7 in this embodiment is installed on the skeleton 11, the connecting plug 4 and the first pin 5 are both matched with the movement component 9, the movement component 9 is matched with the coil 10, the head end of the coil 10 is connected to the second pin 6, and the tail end of the coil 10 is connected to the double plug 7, one end of the CS starting capacitor 12 is connected to the connecting plug 4, and the other end of the CS starting capacitor 12 is connected to the double plug connection end 7-2 of the double plug 7, one end of the CR running capacitor 13 is connected to the running capacitor connection end 5-1 of the first pin 5, and the other end of the CR running capacitor 13 is connected to the double plug connection end 7-2 of the double plug 7.

[0048] Specifically, the basic principle of the weight starter in this embodiment is basically similar to the prior art, and the parts with the same structure will not be described again. The weight starter also includes a fixing screw 1, a cover plate 3, a connecting plug 4, a first plug 5, a second plug 6, a double plug 7, a core assembly 9, a coil 10 and a frame 11, etc. The first plug 5 is provided with a running capacitor connection terminal 5-1, the second plug 6 is provided with a second plug positioning groove 6-1, the double plug positioning groove 7-1, the double plug connection terminal 7-2, the double plug limit terminal 7-3 and the double plug welding terminal 7-4 are provided on the double plug 7, and the frame 11 is provided with a core assembly installation cavity 11-1, a first pin installation cavity 11-2, a second pin installation cavity 11-3, and a second pin installation cavity 11-4. The cavity 11-3, the connecting plug installation cavity 11-4, the double plug installation cavity 11-5, the first pin connection end installation cavity 11-6, the double plug positioning groove 11-8 and the first pin positioning column 11-9, the movement component 9, the first pin 5, the second pin 6, the connecting plug 4, and the double plug 7 are placed in the corresponding installation cavities in sequence, and the cover 3 is closed. Finally, the cover 3 and the frame 11 are fixedly connected with the fixing screws 1, the head end of the coil 10 is connected to the second pin 6 by spot welding, and the tail end of the coil 10 is connected to the double plug 7 by spot welding, thereby forming the heavy hammer starter.

[0049] See also Figure 8The weight starter is connected to the M end of the compressor MY through the second pin 6 and the S end of the compressor MY through the first pin 5, and is directly plugged into the sealed terminal of the compressor MY. In order to improve the starting performance and working efficiency of the compressor motor, the weight starter of the utility model can be connected to the CS starting capacitor 12 and the CR running capacitor 13 at the same time, one end of the CS starting capacitor 12 is connected to the connecting plug 4, one end of the CR running capacitor 13 is connected to the running capacitor connection end 5-1, and the common end of the CS starting capacitor 12 and the CR running capacitor 13 is connected to the double plug connection end 7-2. At this time, the CS starting capacitor 12 and the hammer starter contact system form an energized circuit; before the compressor MY is powered on, the hammer starter contact system is in a normally open state. When the compressor motor starts, the main winding starting current is large, the contact system is energized, and the compressor auxiliary winding is instantly connected, so that the compressor motor runs quickly. As the compressor speed continues to increase, the main winding current drops rapidly, the contact system is released and disconnected, and the compressor motor enters the operating state; after the thermal protector OLP and the hammer starter are inserted into the compressor sealed terminal, the power supply neutral line forms a main winding energized circuit through the double plug 7, the coil 10 and the second pin 6; the thermal protector OLP connection terminal is connected to the power supply live wire, so that the thermal protector OLP is connected in series in the compressor motor circuit. When the grid voltage is high or the refrigeration system fails, the thermal protector OLP is activated, thereby cutting off the power supply to protect the compressor motor.

[0050] A running capacitor connection terminal 5-1 is provided on the first pin 5, and a double plug connection terminal 7-2 is provided on the double plug 7, so that the CS starting capacitor 12 can be connected in the contact loop, and the CR running capacitor 13 can be connected to the output ends of the main winding M and the auxiliary winding M, thereby achieving the purpose of improving the starting characteristics of the compressor MY and the operating efficiency of the compressor MY.

[0051] Example 3 (such as Figure 9-16 as shown).

[0052] The heavy hammer starter with current limiting function in this embodiment includes an NTC thermistor 2, a cover plate 3, a connecting plug 4, a first pin 5, a second pin 6, a double plug 7, a U-shaped connecting piece 8, a movement component 9, a coil 10, a frame 11, a CS starting capacitor 12 and a CR running capacitor 13. The connecting plug 4, the first pin 5, the second pin 6 and the movement component 9 are all installed in the frame 11, the cover plate 3 is covered on the frame 11 by a fixing screw 1, the coil 10 is wound around the outside of the frame 11, the first pin 5 is connected to the S end of the compressor MY, the second pin 6 is connected to the M end of the compressor MY, and the C end of the compressor MY is connected to the thermal protector OLP.

[0053] The double plug 7 in this embodiment is installed on the skeleton 11, the connecting plug 4 and the first pin 5 are both matched with the movement component 9, the movement component 9 is matched with the coil 10, the head end of the coil 10 is connected to the second pin 6, and the tail end of the coil 10 is connected to the double plug 7, one end of the CS starting capacitor 12 is connected to the connecting plug 4, and the other end of the CS starting capacitor 12 is connected to the double plug connection end 7-2 of the double plug 7, one end of the CR running capacitor 13 is connected to the running capacitor connection end 5-1 of the first pin 5, and the other end of the CR running capacitor 13 is connected to the double plug connection end 7-2 of the double plug 7, the NTC thermistor first connection end 2-1 of the NTC thermistor 2 is connected to the double plug connection end 7-2, the NTC thermistor second connection end 2-2 of the NTC thermistor 2 is connected to the U-shaped connecting piece 8, and the U-shaped connecting piece starting capacitor connection end 8-2 of the U-shaped connecting piece 8 is connected to the other end of the CS starting capacitor 12.

[0054] Specifically, the basic principle of the weight starter in this embodiment is basically similar to the prior art, and the parts with the same structure are not described again. The weight starter also includes a fixing screw 1, an NTC thermistor 2, a cover plate 3, a connecting plug 4, a first pin 5, a second pin 6, a double plug 7, a U-shaped connecting piece 8, a core assembly 9, a coil 10 and a skeleton 11, etc. The NTC thermistor 2 is provided with an NTC thermistor first connection terminal 2-1 and an NTC thermistor second connection terminal 2-2, the first pin 5 is provided with a running capacitor connection terminal 5-1, the U-shaped connecting piece 8 is provided with a U-shaped connecting piece positioning groove 8-1 and a U-shaped connecting piece starting capacitor connection terminal 8-2, and the skeleton 11 is provided with a core assembly installation cavity 11-1, a first pin installation cavity 11-2, a second pin installation cavity 11-3, a connecting plug installation cavity 11-4, a double plug installation cavity 11-5, a first pin installation cavity 11-6, a first pin installation cavity 11-7, a U-shaped connecting piece positioning groove 8-1 and a U-shaped connecting piece starting capacitor connection cavity 8-2. The foot connection end mounting cavity 11-6, the U-shaped connecting piece mounting cavity 11-7, the double plug positioning groove 11-8 and the first pin positioning column 11-9, the movement component 9, the first pin 5, the second pin 6, the connecting plug 4, the double plug 7, and the U-shaped connecting piece 8 are placed in the corresponding mounting cavity in sequence, and the cover 3 is closed. Finally, the cover 3 and the frame 11 are fixedly connected with the fixing screw 1, the head end of the coil 10 is spot-welded to the second pin 6, the tail end of the coil 10 is spot-welded to the double plug 7, the first connection end 2-1 of the NTC thermistor 2 is spot-welded to the double plug 7, and the second connection end 2-2 of the NTC thermistor 2 is spot-welded to the U-shaped connecting piece 8 to form the heavy hammer starter.

[0055] See also Fig.11The weight starter is connected to the M end of the compressor MY through the second pin 6 and the S end of the compressor MY through the first pin 5, and is directly plugged into the sealed terminal of the compressor MY. In order to improve the starting performance and working efficiency of the compressor motor, the weight starter of the utility model can be connected to the CS starting capacitor 12 and the CR running capacitor 13 at the same time, and the NTC thermistor 2 is connected in series in the contact system loop, one end of the CS starting capacitor 12 is connected to the connecting plug 4, the other end of the CS starting capacitor 12 is connected to the U-shaped connecting piece 8, one end of the CR running capacitor 13 is connected to the running capacitor connection end 5-1, and the other end of the CR running capacitor 13 is connected to the double plug connection end 7-2. At this time, the CS starting capacitor 12, The NTC thermistor 2 and the heavy hammer starter contact system form an energized circuit; before the compressor MY is powered on, the heavy hammer starter contact system is in a normally open state. When the compressor motor starts, the main winding starting current is large, the contact system is energized, and the compressor auxiliary winding is instantly connected, so that the compressor motor runs rapidly. As the compressor speed continues to increase, the main winding current drops rapidly, and the contact system is released and disconnected, so that the compressor motor enters the operating state; after the thermal protector OLP and the heavy hammer starter are inserted into the compressor sealed terminal, the power supply neutral line forms a main winding energized circuit through the double plug 7, the coil 10 and the second pin 6; the thermal protector OLP connection terminal is connected to the power supply live wire, so that the thermal protector OLP is connected in series in the compressor motor circuit. When the grid voltage is too high or the refrigeration system fails, the thermal protector OLP is activated, thereby cutting off the power supply to protect the compressor motor.

[0056] The NTC thermistor 2, the running capacitor connection terminal 5-1, the double plug 7, the double plug connection terminal 7-2 and the U-shaped connecting piece 8 can not only connect the CS starting capacitor 12 in the contact circuit, but also limit the instantaneous large current in the contact circuit, and can also connect the CR running capacitor 13 at the output ends of the main winding M and the auxiliary winding M, thereby achieving the purpose of improving the starting characteristics of the compressor MY, the operating efficiency of the compressor MY and the life of the compressor auxiliary winding.

[0057] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A heavy hammer starter with a current limiting function, comprising a cover plate (3), a connecting plug (4), a first plug pin (5), a second plug pin (6), a movement assembly (9), a coil (10) and a frame (11), wherein the connecting plug (4), the first plug pin (5), the second plug pin (6) and the movement assembly (9) are all installed in the frame (11), the cover plate (3) covers the frame (11), and the coil (10) is wound around the frame (11), characterized in that: It also comprises a double plug (7) and a CS starting capacitor (12), wherein the double plug (7) is mounted on the frame (11), the connecting plug (4) and the first plug pin (5) are both matched with the core assembly (9), the core assembly (9) is matched with the coil (10), the head end of the coil (10) is connected to the second plug pin (6), the tail end of the coil (10) is connected to the double plug (7), one end of the CS starting capacitor (12) is connected to the connecting plug (4), and the other end of the CS starting capacitor (12) is connected to the double plug connection end (7-2) of the double plug (7).

2. The heavy hammer starter with current limiting function according to claim 1, characterized in that: It also includes a CR operating capacitor (13), one end of which is connected to the operating capacitor connection end (5-1) of the first plug pin (5), and the other end of which is connected to the double plug connection end (7-2) of the double plug (7).

3. The heavy hammer starter with current limiting function according to claim 2, characterized in that: It also comprises an NTC thermistor (2) and a U-shaped connecting piece (8), wherein the NTC thermistor first connecting end (2-1) of the NTC thermistor (2) is connected to the double plug-in connecting end (7-2), the NTC thermistor second connecting end (2-2) of the NTC thermistor (2) is connected to the U-shaped connecting piece (8), and the U-shaped connecting piece starting capacitor connecting end (8-2) of the U-shaped connecting piece (8) is connected to the other end of the CS starting capacitor (12).

4. The heavy hammer starter with current limiting function according to any one of claims 1 to 3, characterized in that: The cover plate (3) is mounted on the frame (11) via fixing screws (1).

5. The heavy hammer starter with current limiting function according to claim 1, characterized in that: The first pin (5) is connected to the S end of the compressor (MY), the second pin (6) is connected to the M end of the compressor (MY), and the C end of the compressor (MY) is connected to the thermal protector (OLP).

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