JPH03156183A - Sealed motor-driven compressor - Google Patents

Abstract

PURPOSE:To prevent the terminals of an overload protecting device from being damaged at the insertion of a cluster into the conductive pin of each of sealed terminals by integrally covering both a connecting terminal and the overload protecting device with a thermally compressive insulator so as to fix both of them. CONSTITUTION:Plural conductive pin boles 9a, 9b, 9c are bored through the bottom face of a cluster (connection terminal) 5 in such a manner that the conductive pins 3a, 3b, 3c of sealed terminals can be inserted into the respective holes; both the cluster 5 and an overload protecting device 7 are integrally covered with an insulator 10 formed by a thermally compressive insulating tube. While the overload protecting device 7 is mounted to the cluster 5, the cluster is inserted into each conductive pin and fixed. However, both the cluster 5 and the overload protecting device 7 are integrally covered with the insulator 10 formed by a thermally compressive insulating tube, and so terminals 7a, 7b are prevented from being damaged even when a force is exerted on the overload protecting device 7 at the insertion of the cluster 5 into each conductive pin.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a hermetic electric compressor that is incorporated into, for example, a refrigerator or an air conditioner, and particularly relates to this hermetic electric compressor. This invention relates to a mounting structure for an overload protection device.

(Prior Art) A mounting structure for an overload protection device for a hermetic electric compressor of this kind that has already been proposed is configured as shown in FIGS. 7 and 10.

That is, in FIGS. 7 and 10, the sun line 6 of the electric motor 4 provided in the case body 3 of the hermetic electric compressor is
It is connected to a conductive pin 3a of a sealed terminal provided on the case body 3 through a cluster (also referred to as a connection terminal) 5, and is further connected to a power supply circuit 1 via an operating capacitor 2. Further, as shown in FIG. 7, an overload protection device 7 made of bimetal, for example, is provided on the side surface of the cluster 5.
is connected to the outside of this overload protection device 7,
An insulating tube 8 is covered.

That is, one terminal 7a of this overload protection device 7 is connected to one terminal 6b of the sunrise line 6, and the other terminal 7b
is one of the conductors provided inside the cluster 5.
connected to. Also, on the bottom of this cluster 5,
Multiple conductive pin insertion holes 9 a s 9 b s 9 c
Each conductive pin 3a is a sealed terminal.

It is perforated so that 3b and 3c can be inserted.

Therefore, the mounting structure of the overload protection device for the hermetic electric compressor described above is such that the overload protection device 7 is attached to the cluster 5 and then inserted into each conductive bottle and fixed therein.

Note that FIGS. 8 and 9 show other conventional embodiments in which an overload protection device 7 is connected to the upper surface of the cluster 5.

(Problem to be Solved by the Invention) However, the mounting structure of the overload protection device of the hermetic electric compressor described above is such that the overload protection device 7 is attached to the cluster 5.
Since the cluster 5 is inserted into each conductive bottle and fixed with the cluster 5 attached, the cluster 5 is inserted into each conductive bottle 3a,
3b and 3c, excessive force is applied to the overload protection device 7, which may damage the terminals 7a and 7b. Since the terminal 6b of the wire 6 is connected to the terminal 6b and the other terminal 7b is connected to a part of the cluster 5, it is troublesome to cover the overload protection device 7 with the insulating tube 8, and it is difficult to cover the overload protection device 7 with the insulating tube 8. There is a problem with reliability due to coating.

The present invention has been made in view of the above-mentioned circumstances, and even if excessive force is applied to the overload protection device when inserting the cluster into each conductive bottle, the terminals of the overload protection device will not be damaged. It is an object of the present invention to provide a hermetically sealed electric compressor in which reliability is improved by insulation by simplifying coating an overload protection device with an insulating material.

[Structure of the invention]

(Means for Solving the Problems and Their Effects) The present invention provides overload protection for the connection terminal that connects the sealed terminal provided in the case body of the compressor and the sunrise wire of the electric motor provided in the case body. In a hermetically sealed electric compressor equipped with the device, both the connection terminal and the overload protection device are integrally covered with a heat-shrinkable insulating material and fixed, and the cluster is inserted into each conductive bottle of the hermetically sealed terminal. In some cases, even if excessive force is applied to the overload protection device, the terminals of the overload protection device are not damaged, and the overload protection device is coated with insulation material. This is intended to improve reliability.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

Note that the present invention includes the same constituent members as those in the above-mentioned specific example.
The same reference numerals will be used to explain.

1, 3, and 10, the sun wire 6 of the electric motor 4 provided in the case body 3 of the hermetic electric compressor is connected to the case body 3 through a cluster (connection terminal) 5. It is connected to the conductive bottle 3a of the sealed terminal, and further connected to the power supply circuit 1 via the operating capacitor 2. The lead wire 6 is bound by a band 6a. Further, as shown in FIG. 1, an overload protection device 7 made of bimetal, for example, is connected to the side surface of the cluster 5. That is, one terminal 7a of this overload protection device 7 is connected to one end 6b of the sunrise wire 6, and the other terminal 7b is connected to one end 6b of the conductor provided inside the cluster 5. connected to.

Further, a plurality of conductive bottle insertion holes 9a, 9b, s9c are bored in the bottom surface of the cluster 5 so that the conductive bottles 3a, 3b, 3c of the sealed terminal can be inserted therein.

Both the cluster 5 and the overload protection device 7 are integrally covered with an insulating material 10 made of, for example, a polyester heat-shrinkable insulating tube. As shown in FIG. 3, the insulating material 10 is provided with an insertion hole 11 larger than the conductive bottle insertion hole 9a at a position that coincides with the conductive pin insertion hole 9a. The conductive bottle 3a can be inserted and fixed into the pin insertion hole 9a.

Therefore, although the overload protection device 7 is attached to the cluster 5 and is inserted into each conductive bottle and fixed, both the cluster 5 and the overload protection device 7 are made of heat-shrinkable insulation. Since the terminals 7a and 7b are integrally covered with the insulating material 10 made of a tube, even if excessive force is applied to the overload protection device 7 when the cluster 5 is inserted into each conductive bottle, the terminals 7a and 7b will not be damaged. It looks like this.

2 shows another embodiment of the present invention, in which an overload protector 17 is attached to the top surface of the cluster 5.

Next, in another embodiment of the present invention shown in FIGS. 4 to 6, the cluster 5 and the overload protection device 7 are connected to each other using a heat-shrinkable truncated cone-shaped insulating material 12 made of polyester, for example. Fig. 4 shows the overload protection device 7 connected to the side of the cluster 5, and Fig. 5 shows the overload protection device 7 connected to the top surface of the cluster 5. It is connected. Furthermore, in these embodiments, the band 6a for binding the sunrise line 6 is no longer necessary.

〔Effect of the invention〕

As described above, according to the present invention, the connection terminal provided on the case body of the compressor and the Hide wire of the electric motor provided inside the case body are sealed with an overload protection device attached. In the type electric compressor, both the connection terminal and the overload protection device are integrally covered with a heat-shrinkable insulating material and fixed, so when inserting the cluster into each conductive bottle of the sealed terminal, This not only eliminates the risk of damaging the terminals of the overload protector even if excessive force is applied to the overload protector, but also simplifies coating the overload protector with insulating material and improves reliability through insulation. It has excellent effects such as being able to improve the situation.

[Brief explanation of the drawing]

1 and 2 are a plan view and a front view showing essential parts of hermetic electric compressors according to different embodiments of the present invention, respectively,
FIG. 3 is a perspective view of an insulating material, FIGS. 4 to 6 are diagrams showing still other embodiments of the present invention, and FIG. 7 is a schematic diagram of an already proposed hermetic electric compressor. Plan view showing part, No. 8
The figure is a front view of the same as above, Fig. 9 is a bottom view of Fig. 8, and Fig. 10 is a bottom view of Fig. 8.
The figure is an electrical circuit diagram of a hermetic electric compressor that has already been proposed. 3... Case body, 4... Electric motor, 5... Cluster (connection terminal), 6... Lead wire, 7... Overload protection device, 9a, 9b, 9c... Conductive pin insertion hole, 10
···Insulating material.

Claims (1)

[Claims] In a hermetic electric compressor in which an overload protection device is attached to the connection terminal that connects the sealed terminal provided in the case body of the compressor and the outlet wire of the electric motor provided in the case body,
A hermetic electric compressor characterized in that the connection terminal and the overload protection device are integrally covered with a heat-shrinkable insulating material.