Search

CN-224233439-U - Automobile air conditioner compressor

CN224233439UCN 224233439 UCN224233439 UCN 224233439UCN-224233439-U

Abstract

The utility model provides an automobile air conditioner compressor which comprises a motor casing seat, a controller box body, a stator assembly and a rotor, wherein the controller box body is connected with the motor casing seat, the stator assembly comprises a stator silicon steel sheet and a coil winding arranged on the stator silicon steel sheet, the stator assembly further comprises an isolation body, a first sealing ring is arranged between the stator assembly and the rotor and connected between the motor casing seat and the controller box body, the isolation body is arranged at a connecting interface of the isolation body and the motor casing seat and a connecting interface of the isolation body and the controller box body, the isolation body, the motor casing seat, the controller box body and the first sealing ring jointly define a sealing cavity for isolating the stator assembly and the environment where the rotor is located, and the stator assembly is accommodated in the sealing cavity. According to the utility model, through the combination of the isolator, the motor casing, the controller box body and the first sealing ring, a static sealing cavity which completely covers the stator assembly is constructed. Insulation reduction and short circuit risks caused by medium erosion are effectively avoided.

Inventors

  • DONG WEI
  • PANG LAIFU

Assignees

  • 上海艾勃宏精工机械有限公司

Dates

Publication Date
20260512
Application Date
20250403

Claims (6)

  1. 1. The automobile air conditioner compressor comprises a motor casing (7), a controller box (13) connected with the motor casing (7), a stator assembly and a rotor (9), wherein the stator assembly comprises stator silicon steel sheets (8) and coil windings (6) arranged on the stator silicon steel sheets (8), and the automobile air conditioner compressor is characterized by further comprising: a spacer (10) provided between the stator assembly and the rotor (9) and connected between the motor housing (7) and the controller case (13), and At least one first sealing ring (11) arranged at the connection interface of the isolating body (10) and the motor casing seat (7) and the connection interface of the isolating body (10) and the controller box body (13); The isolating body (10), the motor casing seat (7), the controller box body (13) and the first sealing ring (11) jointly define a sealing cavity for isolating the stator assembly from the environment where the rotor (9) is located, and the stator assembly is accommodated in the sealing cavity.
  2. 2. The automobile air conditioner compressor according to claim 1, wherein the separator (10) is hollow and cylindrical and is provided with an inner wall and an outer wall, the left end face of the separator (10) is matched with the right end face of the motor housing seat (7), the right end face of the separator (10) is matched with the left end face of the controller box (13), the separator (10) is coated on the periphery of the rotor (9), and a gap exists between the inner wall of the separator (10) and the outer surface of the rotor (9).
  3. 3. An automotive air conditioning compressor according to claim 2, characterized in that the rotor (9) is arranged in the inner cavity of the insulator (10) and mounted on a main shaft (20), and the stator assembly is arranged outside the insulator (10), radially outside the rotor (9), and enclosed by the sealing chamber.
  4. 4. A compressor according to claim 3, wherein the motor housing (7) is substantially cup-shaped or cylindrical, the right end of which is fitted to the left end face of the separator (10), the left end of which is connected to the right end of an intermediate body (5), the controller case (13) is of a box-like or cup-shaped structure, the left end face of which is fitted to the right end face of the separator (10), and the motor housing (7) and the controller case (13) are butted in the axial direction to jointly constitute a part of the outer boundary of the seal chamber.
  5. 5. The compressor of claim 4, wherein the first sealing ring (11) is annular, a second sealing ring (19) is arranged in a groove at a matching interface of the left end face of the separator (10) and the right end face of the motor housing (7), and the first sealing ring (11) is arranged in a groove at a matching interface of the right end face of the separator (10) and the left end face of the controller box (13).
  6. 6. The compressor of claim 5, further comprising a stator three-phase lead wire (12) in a wire harness shape led from the coil winding (6) of the stator assembly, the stator three-phase lead wire (12) passing through a wall of the separator (10), and a three-phase terminal (14) provided in the controller case (13), an end of the stator three-phase lead wire (12) passing through the separator (10) being connected to the three-phase terminal (14).

Description

Automobile air conditioner compressor Technical Field The utility model relates to an air compressor, in particular to an automobile air conditioner compressor. Background With the rapid development of the automobile industry to the electric and intelligent directions, an electric automobile air conditioning system plays a crucial role, and an electric compressor as a core component directly influences the energy efficiency and the riding comfort of the whole automobile. Unlike the conventional fuel vehicle compressor driven by an engine belt, the air conditioner compressor of the electric vehicle is generally directly driven by a built-in motor, and the working environment of the motor is directly exposed to a mixed medium of a refrigerant (refrigerant) and lubricating oil. This particular operating environment presents a significant challenge for the reliability of the motor, and in particular the insulation properties of the stator windings and their electrical connections. The refrigerant, especially the novel environment-friendly refrigerant, may contain liquid components under specific working conditions, and has certain erosion or swelling effect on the enameled wire insulating layer of the motor stator. Meanwhile, the lubricating oil circulated in the compressor and various additives contained in the lubricating oil can also react with insulating materials chemically or physically, and the insulating performance can be reduced under the long-term action. In addition, the motor winding outgoing line and the terminal part connected with the external controller are used as key nodes for electric connection, are also in refrigerant and lubricating oil environments, are more easy to cause weak insulation and even short circuit faults due to factors such as medium invasion, corrosion or vibration, and further cause motor burnout, so that the compressor is invalid, and the driving safety and the user experience are seriously influenced. Therefore, how to effectively protect the motor stator of the electric compressor and the electric connection part thereof, prevent the harmful effects of refrigerant and lubricating oil, improve the insulation reliability and the service life of the motor stator, and become a technical problem to be solved in the field. In order to address the above challenges, some research has been conducted in the prior art. For example, chinese patent application CN110332118a discloses a compressor with a guide ring groove, which includes a casing (including a motor cavity and a bearing cavity), a rotor (whose rotating shaft penetrates the bearing cavity and is located in the motor cavity) installed in the casing, and a sealing member sleeved on the outer periphery of the rotating shaft. The sealing piece is used for isolating the motor cavity from the bearing cavity, and a flow guide ring groove is formed on the inner wall surface of the sealing piece, which corresponds to the rotating shaft. The technical logic is that the rotating shaft is utilized to drive surrounding refrigerant gas to rotate when rotating at high speed, and the gas is thrown out through centrifugal force generated by the guide ring groove, so that the refrigerant gas is prevented from entering the bearing cavity to blow away lubricating oil, and the bearing is protected. However, the technical solution disclosed in CN110332118a has obvious technical problems, and the structural design and the action principle thereof cannot effectively solve the insulation challenges faced by the stator and the lead connection portion thereof. The specific analysis is that firstly, the sealing element and the guide ring groove thereof in the prior art are arranged on the interface between the rotating shaft and the shell (or specific parts), the main function of the sealing element is to manage the gas flow between the bearing cavity and the motor cavity, and the protection object is the lubrication of the bearing. However, for compressor motors, the core components that are truly subject to high voltages and that require very high insulation properties are stationary stators and their windings. The prior art seal arrangement is located at the shaft and does not form any effective physical barrier around the stator. The stator body and the outgoing lines thereof are still completely soaked or exposed in the environment filled with the refrigerant and the lubricating oil in the motor cavity. Second, the prior art relies on dynamic airflow management effects (centrifugal force to throw out gas) generated by high-speed rotation of the shaft, which are hardly effective in preventing liquid (liquid refrigerant or lubricating oil) from invading in a low-speed, stationary state, and also cannot prevent long-term permeation of gaseous refrigerant and oil mist. Therefore, the structural position (on the rotating shaft, rather than surrounding the stator) and the working principle (dynamic air flow management, rather than static physical i