JPH1137048A - Hermetic electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate work after fitting a hermetic motor-driven compressor by fitting electric wires provided with snap-in type receptacle terminals on the extreme ends and an overload protection device to the cover of electrical equipment. SOLUTION: When an electrical equipment cover 4 receiving related parts is assembled with a hermetic vessel 1 receiving a compressor and a motor, at first a lead wire 6c from the outer part, a receptacle terminal 5c, and an overload protection device 3 connected to a lead wire 6c' are built in the electrical equipment cover 4. Snap-in type receptacle terminals 5a, 5b, 5c respectively connected with lead wires 6a, 6b, 6' are guided with a projection 4A on the inner face of the cover and fitted in the fixed positions. When a cap 7 is further inserted, the contact terminals 5a-5c are pressed in, and they are held with the fixed positions. When the fitted electrical equipment cover 4 is pressed against on the terminal 2 of the hermetic vessel 1 as it is and fixed with a pressing clamp 8, the assembling is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor used for electric equipment such as a refrigerator for home use and a dehumidifier, and more particularly to a structure for mounting electric components.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a conventional hermetic electric compressor, a compressor and an electric motor M are housed in an airtight container E, and three terminals P to which internal motor windings are connected are provided. Insulated and fixed to the surface of the closed container. An external power supply is connected to these terminals P via a snap-in type receptacle terminal, or a PTC activation relay Ry having a snap-in type receptacle terminal or a PTC activation relay Ry having a snap-in type receptacle terminal is mounted. An external electric wire is connected to this terminal P, and an external electric wire is connected to a terminal on the upper surface of the PTC activation relay, or an overload protection device OLR is attached and connected. Thereafter, an electrical component cover C is put on for protection and electrical insulation of these components. Was.

[0003]

SUMMARY OF THE INVENTION Household refrigerators, dehumidifiers, etc. are designed to minimize the external dimensions in consideration of the Japanese housing situation, and the space for storing parts is similarly restricted. . After incorporating the hermetic electric compressor into these electric devices, the overload protection device and PTC activation relay are installed, and the electrical component cover is installed after wiring, and the assembly and wiring of the related parts are not easy. In some cases, the worker worked in an unreasonable position or groping.

[0004] Accordingly, an object of the present invention is to facilitate the work after the hermetic electric compressor is attached.

Another object of the present invention is to improve the reliability of a PTC activation relay attached to a terminal provided in a closed container so that heat, vibration, dust, grease, etc. from a compressor of the relay can be improved. The purpose is to eliminate the cause of reliability deterioration such as intrusion of foreign matter.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a closed electric motor in which a wire having a snap-in type receptacle terminal at its tip and an overload protection device are attached in advance to an electrical component cover made of synthetic resin. This makes connection and installation to the compressor extremely simple. That is, snap-in type receptacle terminals, which were previously connected by harness processing of electric wires, were fitted with projections formed inside the electrical component cover as guides, and then they were inserted with the terminals,
Insert the cap to withstand the pull-out strength and hold it stably. Next, since the PTC activation relay is not attached to the closed container, the insertion hole to the terminal is eliminated, and the vibration of the compressor is not received.

[0007]

As described above, since the components are attached to the electrical component cover in advance and then attached to the closed container, the work in a narrow space can be performed only once and is extremely simple. In addition, since the PTC activation relay is not attached to the closed container, the insertion hole to the terminal is eliminated, so that intrusion of foreign substances such as dust, oil and fat which may cause a failure can be prevented.
Although the C element is compressed and energized by a load applied to a leaf spring made of stainless steel or a copper alloy, it is stably maintained because it is not subjected to vibration of the compressor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a sealed container for accommodating a compressor and a motor (not shown), 2 denotes three terminals insulated and fixed to the surface of the sealed container and is connected to an internal motor winding, and 3 denotes an overload. Protective device, 4 is an electrical component cover, 5a, 5b, and 5c are snap-in type receptacle terminals. One end of each is inserted with the terminal 2 to form a connection joint 5A, and the other end 5B is connected to lead wires 6a and 6b. , 6c
Connect.

In this embodiment, the power supply and the PTC
2 leads from starting relay (or capacitor) 6
a and 6b are snap-in type receptacle terminals 5a and 5b
To the terminal 2 via. Further, another lead 6c 'from the power supply is connected to one terminal 3 of the overload protection device 3.
A, and the other terminal 3B is connected to the terminal 2 via the lead wire 6c and one snap-in type receptacle terminal 5c.

For this reason, the electrical component cover 4 is provided with a projection 4A on the inner surface to position the snap-in type receptacle terminals 5a, 5b, 5c so as to guide them so that they can be correctly joined to the terminals 2. Reference numeral 7 denotes a cap which covers the contact 5 and is fixed by inserting the projections 7B on both sides into holes in the wall of the cover 4 to keep the holes 7A for inserting the terminals 2 at predetermined positions.
Reference numeral 8 denotes a clamp which is fixed to the closed container after being attached to the cover 4.

Next, an assembling method will be described. First, the electrical component cover 4 has a lead wire 6c 'from the outside and a lead wire 6c' connected to the snap-in type receptacle terminal 5c.
Of the overload protection device 3 connected thereto. The snap-in type receptacle terminals 5a, 5b, 5c to which the lead wires 6a, 6b, 6c 'are respectively connected are guided by the projections 4A, and can be very easily fitted into predetermined positions. When the cap 7 is further inserted, the contacts 5a, 5b, and 5c are pushed in, and are held at predetermined positions.

The electrical component cover 4 with the lead wires 6a, 6b, 6c and the overload protection device 3 mounted thereon is brought as it is onto the terminal 2 of the sealed container 1,
It is very easy to complete the assembling simply by fixing with.

[0013]

As described above, according to the present invention, since parts are attached to the electrical component cover in advance and then attached to the closed container, work in a narrow space can be performed only once, and workability can be significantly improved. Also, since the PTC activation relay is not attached to the sealed container, the insertion hole to the terminal can be eliminated,
It is possible to prevent intrusion of foreign substances such as dust and oil which cause a failure. In addition, a PTC element that generates heat is compressed by a load applied to a leaf spring made of stainless steel or a copper alloy and is energized. However, the PTC element is stably maintained without being subjected to vibration of the compressor. Since the PTC activation relay is not attached to the electrical component cover, the height dimension is reduced, and as a synergistic effect, the space in the electrical device is widened and the work is easier, or the size of the electrical device can be reduced.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention. FIG. 1A is a partially cut plan view, and FIG. 1B is a partially cut front view.

2 (A) is a bottom view when an electric wire and an overload protection device are attached to an electrical component cover, and FIG. 2 (B) is a bottom view when a cap is further attached.

3 (A) is a plan view, FIG. 3 (B) is a front view, FIG. 3 (C) is a bottom view, and FIG. 3 (D) is D in FIG. 3 (A). FIG.

FIG. 4 is an electric circuit diagram.

FIG. 5 is a central sectional view of a general hermetic electric compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Terminal 3 Overload protection device 4 Electrical component cover 4A Projection 4B Separate projection 5a, 5b, 5c Snap-in type receptacle terminal 6a, 6b, 6c Lead wire 7 Cap 8 Clamp

Continuing from the front page (72) Inventor Tomoyuki Ito 5-45-5, Kamiida Minamicho, Kita-ku, Nagoya-shi, Aichi Prefecture Inside Yamada Electric Manufacturing Co., Ltd. Inside

Claims (2)

[Claims] 1. A snap-in type receptacle which is insulated and fixed to a surface of an airtight container housing an electric motor and a compressor and which is connected to an internal electric motor winding and which is connected to the electric equipment cover. A hermetic electric compressor, wherein a terminal is provided inside and the electric component cover is fixed to the hermetic container so as to cover the terminal. 2. The hermetic electric compressor according to claim 1, wherein the PTC activation relay is installed at a location remote from the hermetic container.