JPS61247251A - Refrigerant compressor - Google Patents

Abstract

PURPOSE:To miniaturize a frame lightening the weight, by connecting external and internal covered insulating wires together via a connecting shell, and by forming them with insulating material into a sealed terminal. CONSTITUTION:Internal and external covered insulating wires 3, 5 are connected together via a connecting shell 7, and are formed with insulating material 8 into a sealed terminal 1. The internal covered insulating wire 3 is connected to a stator coil 2, and the external covered insulating wire 5 is connected to the connecting section of a terminal box 27 which can be set at an optional position. As the result, the miniature frame 9 of lightweight and the thin cover of small diameter can be obtained, and the sealed terminal 1 is easily fitted and mounted and can be miniaturized lightening the weight, and the power wire connecting section can be set at an optional position.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a motor-driven hermetic refrigerant compressor used in a refrigerant device, and in particular to an improvement in a sealed terminal that supplies high-voltage power to the motor. 0 [Prior Art] Fig. 7 is a sectional view showing the terminal section of a conventional refrigerant pressure m machine. In the figure, (1) is a sealed terminal, (2) is a motor stator coil, and (3) is a The internally covered insulated wire 0(4) is a power wire that supplies power from an external power source and is not included in the compressor. (6) is the connection part of the power wire (4),
The crimp terminal (Wl) is crimped to the conductor of the power wire (4), and is fixed with the center conductor (4 and nut) of the sealed terminal (1). The charged part of the nut is filled with an insulating material.The sealed terminal (1) is sealed with an O-ring to keep the internal refrigerant σ gradient airtight, and the motor 7 frame (9) is sealed with a bolt. The 0 stator coil (2) fixed to the terminal mounting head and the sealed terminal (1) are connected by an internally covered insulated wire (3), and like the power wire (4), a crimp terminal and a nut are connected. is connected to the center conductor (21) of the terminal (1).

The crimp terminal (to) and the nut-1 center conductor (21) are provided with sufficient space and insulation distance from the motor frame (9), the stator (b), and the lid (to).

The lid (to) is sealed to the motor frame (9) with an O-ring and fixed with an O-ring bolt, and the internally covered insulated wire (
It is necessary to ensure a sufficient outer diameter to enable connection work between 3) and the sealed terminal (1), and the wall thickness must be sufficient to withstand the pressure difference between the internal refrigerant (B) and the outside atmosphere. do.

(B) is a shaft around which a rotor (to) is fixed and rotated, and (B) is a stator fixed to a frame (9). (Incorporated) is a terminal box that covers the sealed terminal (1) and has a sufficient insulation distance from the sealed terminal (1). In addition, the sealed terminal (1) has screws cut on both ends, the center conductor is integrally molded with an insulating material (3), and the 72-inch part (1a) has a bolt hole.
)have.

The assembly order of the refrigerant compressor configured as described above is: first, fix the sealed terminal (1) to the motor 7 frame (9) with four bolts, and then fix the internally covered insulated wire integrated with the stator coil (2). Fix the crimp terminal (3) to the center conductor @1) with nuts 4. Note that this connection portion may be insulated from the outside with an insulating material. Next, attach the lid (to) to the frame (9)K, and attach the terminal box to the frame (9). on the other hand,
The connection part (6) between the power wire (4) and the sealed terminal (1) is constructed on site after the installation of the compressor, and the stator ση is attached to the frame (9) in advance. When testing the compressor at the factory, no insulation material is applied to the connection (6);
Insulating material on the outside of the sealed terminal (1) (8 pins facing the center conductor)
It is necessary to provide an insulation distance with sufficient space between the connection part (6) and the 7 frame (9) and the terminal box) due to the uncertainty of the insulation work of the connection part (6). not only. Further, the connecting portion (6) is on an extension of the center conductor (21), and cannot be provided at an arbitrary position even if there are restrictions on the configuration of the refrigeration system.

FIG. 8 is an external view of a stator (b) supplied with an internally covered insulated wire (3) connected to a fixed coil (2). Figure 9 is a side view and a front view of the motor frame (9) with the terminal part (9a) protruding largely to ensure an insulated distance from the grounding part since there is a charged exposed part in the internal connection part of the sealed terminal (1). As shown in the figure, a terminal box (Figure M7) is attached to this protruding terminal portion (9a).

[Problem that the invention seeks to solve]

Conventional refrigerant compressors are configured as described above, so
The higher the supplied voltage, the lower the center conductor e1 of the sealed terminal (1).
The length in one direction is long to ensure insulation distance, and the frame (9) has a shape that protrudes far beyond the outer diameter of the stator α, making it larger and reducing the pressure difference between the internal refrigerant and the atmosphere. In order to withstand this, the frame (9) becomes thicker and its weight also increases. Further, the outer diameter of the lid (to) is increased to facilitate the connection work between the sealed terminal (1) and the internally covered insulated conductor (3), and therefore, the wall thickness is also increased like the frame (9). Furthermore, since the sealed terminal (1) requires a long insulation distance to the outside, there are also problems such as the size of the terminal box (in the terminal box).

This invention was made to solve the above-mentioned problems, and it minimizes the insulation distance by eliminating exposed charged parts near the sealed terminals, making the frame and terminal box smaller and lighter, and reducing the diameter of the lid. In addition to being lighter and thinner, the refrigerant compressor has a smaller sealed terminal, a smaller sealed terminal mounting part, and a flexible terminal box that allows the connection to the power cable to be placed in any position. The purpose is to obtain.

[Means for solving problems]

The refrigerant compressor according to the present invention connects an internally coated insulated wire and an externally coated insulated wire via a connecting tube and molds them with an insulating material to form a sealed terminal, and connects the internally coated insulated wire to a stator coil of a motor. The externally covered insulated wire is connected to a terminal box that can be installed at any location.

[Effect]

In the refrigerant compressor of this invention, the inner and outer coated insulated wires are connected via a connecting tube and molded with an insulating material to form a sealed terminal, so that the sealed terminal is formed like the Hiji wire of the stator coil. Further, the charged portion of the externally covered insulated wire is not exposed to the connection portion of the terminal box.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In Figures to Figure 3, (1) is an internally coated insulated wire (3)
and externally covered insulated wire (5) are integrally molded with insulating material (3) through a connection tube (γ), and are connected to the stator coil (2) and supplied to the stator (b) as shown in Figure 5. It is a sealed terminal that can be used to seal the refrigerant) with an O ring (■), and is fixed to the mounting head of the motor frame (9) with a retaining ring (α). (To) The sealed terminal (1) is installed on the frame (9)
Since the structure allows the lid to be opened from the outside, the lid is small in diameter and thin. The terminal box (goods) covering the connection part (6) can be installed at any position, and does not impose restrictions on the design of the compressor. Also,
The terminal box (b) that covers the sealed terminal (1) is
Compact because the insulation distance between the two can be minimized.

Lighter weight can be achieved. FIG. 2 is a view of the compressor terminal section viewed in the axial direction, and the shape of the frame (9) does not need to break from the circular shape that is most optimal for the container. Figure 3 is a sectional view of the sealed terminal (1), and as shown in Figure 5, the sealed terminal supplied as the lead wire of the stator coil (2) is passed through the mounting hole from the inside to the outside and the retaining ring QIIJ is installed. and fix it in the mounting hole. The connection tube (γ) of the sealed terminal (1) has inner and outer coated insulated wires (
3), by being fixed to the conductive parts of (5) and integrally molded with the insulating material (3), the outer diameter of the connecting tube (7) and the insulating material (3) are fixed.
are in close contact to make the refrigerant airtight.

Fig. 4 is the same as the embodiment shown in Fig. 3, but during assembly, the sealed terminal (1) is passed from the inside through the mounting hole ■ and pulled out to the outside, the O ring ■ and the inner retaining ring Oat are attached, and then Push the vaginal terminal (1) into the mounting hole (7) and attach the washer and the outer retaining ring α, thereby sealing the terminal (1).
) can be attached and detached from the outside.

Note that FIG. 6 is a side view and a front view of the frame (9), and the mounting portion of the sealed terminal does not impose any restrictions on the design of the frame (9), so that the mounting portion does not protrude.

〔Effect of the invention〕

As explained above, according to the present invention, the inner and outer insulated wires are connected through a connecting tube and made of an insulating material to form a sealed terminal, the inner and outer insulated wires are connected to the stator coil, Since the external insulated wire is connected to the connection part of the terminal box, which can be installed in any position, the frame is smaller.
It is possible to obtain a lid with a small diameter and thin wall, and the sealed terminal part can be attached, making the machining easy, compact and lightweight, and the power wire connection part can be installed in any position, eliminating the limitations of the terminal box. This has the effect of providing a refrigerant compressor that is not affected by

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a terminal section of a refrigerant compressor showing an embodiment of the present invention, FIG. 2 is a side view of the terminal section, and FIGS.
The figures are cross-sectional views showing how the sealed terminals are installed, Figure 5 is an external view of the stator, Figure 6 is a side view and front view of the frame, and Figure 7 is a cross-section of the terminal section of a conventional refrigerant compressor. Similarly, FIG. 8 is an external view of the stator, and FIG. 9 is a side view and a front view of the frame. (1): Sealed terminal (2): Stator coil (3)
: Internally coated insulated wire (6): Externally coated insulated wire (7): Connection tube (3): Insulating material (9): Motor frame α mark: For retaining ring): Refrigerant (A): 0 ring Note that in the diagram ,
Same code indicates same or equivalent part 0

Claims (3)

[Claims] (1) In a hermetic refrigerant compressor driven by an electric motor, in a circuit that supplies power from an external power source to the electric motor, a sealed terminal that isolates the refrigerant from the atmosphere in the refrigerant circuit that cools the electric motor extends to the motor stator coil. and an outer sheathed insulated wire that extends to a connection point with a power wire that supplies power to the compressor, and the sealed terminal is connected to the inner and outer sheathed insulated wires through a connecting tube. A refrigerant compressor, characterized in that the refrigerant compressor is integrally molded with an insulating material, and the sealed terminal is attached to a mounting hole of a motor frame. (2) The refrigerant compressor according to claim 1, wherein the sealed terminal is fixed to the motor frame with a retaining ring. (3) The refrigerant compressor according to claim 1, wherein the outer covered insulated wire has a length equal to or longer than the outer diameter of the motor stator.