A compressor counterweight starter
By introducing guide ramps, rivet engagement, and isolation wall structures into the compressor starter, combined with temperature-sensitive elements and flame-retardant materials, the problems of unstable plugging and poor safety of existing compressor starters have been solved, achieving a starter design with high reliability and long service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LANXI YUEQIANG ELECTRIC CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-03
AI Technical Summary
Existing compressor starters have deficiencies in plug-in guidance, structural reliability, internal safety protection, and overheat response, leading to safety hazards and reliability issues.
A compressor counterweight starter was designed, which uses a guide slope structure to guide the insertion of electrical connectors, rivets to fix the connection, an internal isolation wall to separate the contacts, and is equipped with temperature-sensitive elements and flame-retardant materials to achieve stable insertion, enhance safety and overheat protection.
It improves the smoothness of connection, enhances structural stability and safety, reduces electrical hazards, extends service life, and meets the high safety requirements of light commercial refrigeration equipment.
Smart Images
Figure CN224458802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a starter, specifically a compressor counterweight starter. Background Technology
[0002] With the development of the refrigeration industry, the compressor, as the core component of refrigeration equipment, has become a key factor in ensuring the performance and safe operation of the entire unit through reliable starting. In light commercial refrigeration equipment, capacitor-start single-phase asynchronous compressors are often used. These compressors have large starting currents and high instantaneous power requirements. If the starting control is not properly implemented, it can easily lead to compressor starting failure, overheating, or even burnout, thereby causing safety accidents.
[0003] like Figure 3 and Figure 4 As shown, traditional compressor starters typically use a self-tapping screw connection structure. Because compressors generate continuous vibration during operation, this type of connection structure suffers from poor reliability and a high risk of loosening. Once loosening occurs, it not only causes unstable electrical connections but may even lead to arcing, generating sparks or heat buildup, posing a serious safety hazard.
[0004] Meanwhile, existing starters lack sufficient plug-in guide mechanisms in their structural design (the insertion position is at a right angle). During installation, users are prone to problems such as incorrect insertion of terminals, jamming of sockets, or forced insertion. These issues can range from minor damage to the socket structure to serious safety hazards such as loose connections and leakage, reducing product reliability and lifespan.
[0005] In addition, some starters lack effective design for insulation isolation between internal electrical contacts, which makes it easy for dust, moisture or foreign objects to enter the area between the moving and stationary contacts, creating a risk of short circuit or electric shock; and they do not integrate a temperature response protection mechanism, so when the compressor operating environment temperature rises or abnormal operating conditions occur, they cannot cut off the circuit in time, which can easily cause the compressor to overheat, the insulation to age or burn out.
[0006] In summary, existing compressor starters have certain technical deficiencies in terms of plug-in guidance, structural reliability, internal safety protection, and overheat response. There is an urgent need for a new type of compressor starter structure with a more reasonable structure, faster thermal response, higher safety, and longer service life to meet the high safety and high reliability starting control requirements of current light commercial refrigeration equipment. Utility Model Content
[0007] To address the aforementioned problems, this invention provides a compressor counterweight starter, which effectively overcomes the shortcomings of existing technologies.
[0008] This utility model is achieved through the following technical solution: a compressor counterweight starter, comprising:
[0009] A starter body, which is used to connect to the refrigeration compressor circuit, has multiple mounting holes;
[0010] A guide structure is provided at the entrance of the mounting socket to guide the electrical connector to be smoothly inserted into the socket;
[0011] A connecting and fixing structure is provided on the starter body to fix the starter body;
[0012] A safety protection structure is installed inside the starter body to separate the moving contacts from the stationary contacts, preventing dust or foreign objects from entering and causing short circuits or safety hazards.
[0013] As a preferred technical solution, the guide structure is a guide slope that is inclined toward the inner cavity of the socket.
[0014] As a preferred technical solution, the connection and fixing structure adopts a riveting method.
[0015] As a preferred technical solution, the safety protection structure is an isolation wall installed inside the starter body to separate the moving contact from the stationary contact.
[0016] As a preferred technical solution, the starter body includes a bottom shell and a cover plate, and the bottom shell and the cover plate are connected and fixed by the connecting and fixing structure.
[0017] As a preferred technical solution, the isolation wall is disposed on the bottom surface of the cover plate, and the moving contact or stationary contact is installed at the position of the isolation wall.
[0018] As a preferred technical solution, a temperature-sensitive element is provided inside the starter body to detect the starter's operating temperature and control the starting process, thereby preventing the compressor from overheating.
[0019] As a preferred technical solution, the temperature-sensitive element is a negative temperature coefficient thermistor, which is used to limit surge current protection circuit during startup.
[0020] As a preferred technical solution, the starter body is made of flame-retardant plastic material to improve overall heat resistance and service life.
[0021] As a preferred technical solution, the starter is used in the refrigeration compressor circuit, which can provide instantaneous high current during the start-up phase, be triggered by the counterweight mechanism, and automatically disconnect after the start-up is completed.
[0022] The beneficial effects of this utility model are: by setting a guide slope structure at the entrance of the installation socket, this utility model enables the insertion process to have automatic centering and guidance functions, which can effectively avoid problems such as misalignment, jamming or damage to the socket structure when electrical connectors are inserted, thus improving the smoothness of insertion and service life.
[0023] This utility model adopts a riveted connection and fixing structure, replacing the traditional self-tapping screw method, fundamentally solving the problem of screw loosening caused by equipment vibration during use, significantly improving the stability and safety of the structural connection, and reducing maintenance costs and failure rate.
[0024] This invention uses an isolation wall inside the starter as a safety protection structure to effectively isolate the space between the moving and stationary contacts, preventing dust, insects, condensate, or other foreign objects from entering, reducing the risk of contact breakdown or short circuit, and enhancing the overall electrical insulation performance. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the bottom structure of the cover plate of this utility model;
[0028] Figure 3 Schematic diagram of the structure in the prior art Figure 1 ;
[0029] Figure 4 Schematic diagram of the structure in the prior art Figure 2 ;
[0030] Explanation of reference numerals in the attached figures:
[0031] 4. Mounting socket; 3. Guide slope; 5. Connecting and fixing structure; 6. Isolation wall; 2. Bottom shell; 1. Cover plate; 8. Moving contact; 7. Stationary contact. Detailed Implementation
[0032] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0033] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0034] like Figures 1-2 As shown, a compressor counterweight starter has been redesigned in structure and function, making it particularly suitable for use in the starting control system of refrigeration compressors. It effectively improves connection stability, structural safety, and the overall service life of the starter. The starter includes a starter body for connecting to the refrigeration compressor circuitry and integrates multiple mounting holes to ensure reliable connection with external electrical components.
[0035] In practical applications, the compressor power cord or electrical terminals need to be inserted into the starter's socket for electrical connection. To avoid damage to the socket structure due to improper insertion or misalignment, this utility model provides a guide structure at the entrance of each installation socket to guide the electrical connector to be smoothly inserted into the socket.
[0036] The guide structure is a guide ramp that is inclined towards the inner cavity of the socket. This structure, through an inward-curving conical transition around the socket periphery, allows the insertion force to automatically align with the socket under the guidance of the ramp, significantly reducing resistance and misalignment risks during insertion. This reduces problems such as poor contact, plastic shell cracking, or plug bending caused by human-induced insertion misalignment, improving assembly efficiency and reliability. The guide ramp can be integrated with the socket body using a one-piece injection molding process, ensuring good dimensional consistency and mechanical strength of the guide structure.
[0037] To enhance the overall structural robustness and long-term stability of the starter, a connecting and fixing structure is incorporated into the starter body. This structure employs a riveting method, using symmetrically distributed riveting holes at the mating points of the bottom shell and cover plate, and mechanically riveting with metal rivets, replacing the traditional self-tapping screw locking method. This solution eliminates the potential for screw loosening due to equipment vibration or thermal expansion and contraction during long-term compressor operation.
[0038] Rivet connections offer advantages such as anti-loosening, shock resistance, and irreversible loosening, significantly improving the stability and fatigue resistance of the connection. This ensures that the starter maintains reliable structural tightness under various working environments, preventing electrical hazards caused by loose joints.
[0039] This invention also features structural optimizations for safety protection. The starter body has an internal safety protection structure to separate the moving and stationary contacts, preventing dust, moisture, small insects, or other foreign objects from entering the contact area and causing short circuits, arcing, or breakdowns. This safety protection structure is an isolation wall located inside the starter body, preferably positioned on the bottom surface of the cover plate, forming a ring-shaped or partitioned barrier around the space between the moving and stationary contacts. This isolation wall can be integrally formed with the cover plate, providing excellent structural sealing and insulation protection.
[0040] During assembly, the contact components can be positioned and installed in the pre-set openings or slots of the isolation wall, thereby ensuring that the electrical connection is both stable and has clear mechanical limits and insulation protection, further improving the safe operation of the starter under harsh conditions such as high temperature and high humidity.
[0041] The starter body is composed of a bottom shell and a cover plate, which are connected and fixed by the aforementioned riveting structure. The bottom shell supports and houses the internal main control circuit, moving and stationary contacts, electrical connection sockets, and other core components, while the cover plate serves to enclose, seal, and protect the components.
[0042] In the structural design, the bottom shell and the cover plate are provided with a slot and a riveting hole to ensure that a whole sealed and earthquake-resistant structure is formed after assembly.
[0043] To further improve the starter's response to operating temperature, this invention also includes a temperature-sensitive element inside the starter body. This element is used to detect the operating temperature of the current path of the starter or compressor in real time, and automatically control the on / off of the starting circuit according to temperature changes, thereby playing a protective role in preventing the compressor from overheating.
[0044] The temperature-sensitive element is preferably a positive temperature coefficient thermistor (PTC thermistor), which has the characteristic that its resistance increases rapidly when the temperature rises, thereby limiting the current flow. The PTC element is connected in series in the starting circuit. When the compressor starts, if the system temperature reaches the set threshold, the PTC element will automatically increase the current blocking level, thereby cutting off the starter output path and preventing the motor from continuing to start under load. It has a self-recovery function and high reliability, and is particularly suitable for scenarios that require multiple start protection.
[0045] Furthermore, to ensure stable operation of the starter in various high-temperature, humid, and flammable environments, the main body of the starter is made of high-flame-retardant engineering plastics, such as flame-retardant modified polycarbonate (FR-PC) or flame-retardant nylon (FR-PA), which possess excellent heat resistance, aging resistance, electrical insulation, and flame-retardant properties. This material not only meets national electrical safety standards but also maintains the integrity of the housing structure under long-term electrical loads and thermal cycling conditions, effectively preventing secondary risks caused by material softening, deformation, melting, or combustion.
[0046] In terms of functionality, this starter is used in the starting control circuit of a refrigeration compressor. It has the ability to conduct instantaneous high current and is internally equipped with a mechanical contact structure based on the principle of weight triggering. When the compressor start signal is issued, the weight causes the moving contact to close and conduct with the stationary contact under the action of electromagnetic force or gravity, so as to realize the power supply to the compressor starting winding. After the start-up process is completed, the contacts automatically disconnect the starting circuit according to the temperature or time response, so as to realize the independent operation of the compressor main winding, thereby avoiding equipment damage caused by long-term high current operation.
[0047] This compressor starter features a guide beveled socket structure to improve plug-in reliability, rivet engagement to enhance overall stability, an isolation wall to effectively isolate contact points, a temperature-sensitive element for overheat protection, and a flame-retardant plastic housing to ensure overall thermal safety. It boasts significant advantages such as simple structure, clear function, safe use, and long service life, making it suitable for light commercial refrigeration compressor systems with high requirements for starting safety and long-term reliability.
[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A compressor weight starter characterized by, include: A starter body, which is used to connect to the refrigeration compressor circuit, has multiple mounting holes; A guide structure is provided at the entrance of the mounting socket to guide the electrical connector to be smoothly inserted into the socket; A connecting and fixing structure is provided on the starter body to fix the starter body; A safety protection structure is installed inside the starter body to separate the moving and stationary contact cavities and pins, preventing dust or foreign objects from entering and causing short circuits or safety hazards.
2. The compressor deadweight starter of claim 1, wherein: The guide structure is a guide slope that is inclined toward the inner cavity of the socket.
3. The compressor deadweight starter of claim 1, wherein: The connection and fixing structure adopts a riveting method.
4. The compressor deadweight starter of claim 1, wherein: The safety protection structure is an isolation wall installed inside the starter body, used to separate the gap between the sealing moving and stationary contact cavity and the pin.
5. The compressor deadweight starter of claim 4 wherein: The starter body includes a bottom shell and a cover plate, and the bottom shell and the cover plate are connected and fixed together by the connecting and fixing structure.
6. The compressor deadweight starter of claim 5 wherein: The isolation wall is located on the bottom surface of the cover plate, and the moving or stationary contact is installed at the location of the isolation wall.
7. The compressor dead-band starter of claim 1, wherein: The starter body is equipped with a temperature-sensitive element to detect the starter's operating temperature and control the starting process to prevent the compressor from overheating.
8. The compressor deadweight starter of claim 7, wherein: The temperature-sensitive element is a negative temperature coefficient thermistor, used to limit surge current protection circuits during startup.
9. The compressor dead-band starter of claim 1, wherein: The starter body is made of flame-retardant plastic material to improve overall heat resistance and service life.
10. The compressor counterweight starter according to claim 1, characterized in that: The starter is used in the refrigeration compressor circuit and can provide instantaneous high current during the start-up phase. It is activated by a counterweight mechanism and automatically disconnected after the start-up is completed.