JPS6135595A - Electric part protecting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an electrical equipment protection device, and is particularly suitable as a protective cover for a compressor starting device and overload protection device used in a refrigerator or the like.

[Background of the invention]

The conventional electrical protection device for refrigerator compressors was developed in 1982.
As in the conventional example of Publication No. 17877, the starting device and overload protection device were attached to the compressor separately and then a protective cover was attached, but with the automation of assembly and speeding up of production, there is a strong need for integrated installation. Said Utsukai Showa 56-178
77, as shown in FIG. 3, a starter device 15 and an overload protection device 16 are integrally attached to a protective cover 18 using a mounting base 17, and then attached to a compressor.

Starting bag! 15 is a semi-finished product when used alone, and terminal fitting 19.1
9 and the electrode holder 20 together with the mounting base 17 to complete the product, the work process is complicated and the starting device 15. When testing the characteristics of the overload protection bag V:j, 16 alone, electrical connections to the terminals 15a and 16a cannot be made as simple as an insertion type, so a clamping method using clips must be used. It was difficult to automate. In addition, protective cover 1
There is a fitting hole 18a for the starter 15 in 8, and a waterproof protector was provided on the compressor outer shell to prevent water from penetrating into the protective cover 8 during a water injection test assuming that it would be exposed to water. However, due to the miniaturization of pressure wI machines in recent years and the use of horizontal rotary systems, the area of the starting device mounting part has become smaller, and there is no room to install a protifter above the protective cover 18, so the conventional electric Product protection devices were no longer satisfactory. Furthermore, the protective cover 18, starter device 15, and mounting base 17 of the conventional example described above are installed by providing a locking rib 18b on the inside of the protective cover 18, and hooking this locking rib 18b onto the side surface 17a of the mounting base. Save,
Starting device i! 15 and the protective cover 181, so when installing the spring to the compressor, the upper part of the starting device 15b
The fitting hole 18a of the protective cover 18 could not be omitted. Furthermore, since the locking rib 18b is tapered in the opposite direction to the mold-cutting direction, the locking rib 18b is used as a split mold and the mold is removed by sliding, which increases the molding time of the protective cover 18, which is a factor in increasing the cost. At the same time, there was a drawback that the mold life was short.

[Object of the Invention] An object of the present invention is to improve the problems of the conventional electrical protection device and to provide an electrical protection device that is suitable for downsizing of compressors.

[Summary of the invention]

In other words, the installation of the starting device and overload protection device required as electrical equipment protection devices used in the refrigerator compressor section, the waterproofing and electrical insulation properties of the electrical equipment mentioned above are important.

In addition, in order to satisfy the requirements of strength against compressor vibration and noise, and to create an inexpensive groove, the starting device and overload protection device, which are assembled independently, are housed in the protective cover by press-fitting. It is intended to be installed on the compressor as one unit.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. First, in the first @, 1 has electrode rods 3, 3 for electrically connecting the compressor internal motor and the starter 2 on the side surface of the outer shell of the horizontal rotary compressor. 4 is an overload protection device, 5 is a protective cover, and 6 is a pressing spring. The starting device 2 is a case 8 containing a positive temperature coefficient thermistor 7. Lid 9, case 8, leaf spring 1o for attaching lid 9, and terminal 11 connected to electrode rod 3.3 or positive temperature coefficient thermistor 7
, 11, 11, and is directly connected to the electrode rods 3, 3 outside the compressor v11.

Note that the electrode rods 3, 3 and electrode receivers 2a, 2a, 2a
There are three each in an equilateral triangle as shown in Figure 3. Reference numeral 12 is a mounting leg provided on the compressor outer shell l, and has mounting holes 12a, 12a for mounting the compressor itself to a refrigerator, and locking holes 12b, 12b for mounting a presser spring. Further, 13 indicates the terminal of the overload protection bag [4].

The protective cover 5 is a box-shaped plastic molded product with an opening 5a on the compressor/outer shell 1 side, and is located in the groove 8 of the case 8 of the starter device 2.
4. It has a rib 5b that fits into the first FII device 2 and holds the side surface of the FII device 2. [ff4 installed below case 8 in item 1]
! It has a protruding piece 5c that fits into the hole 8b and presses the starter 2 onto the upper surface of the protective cover 5.

The slot 8b is provided approximately at the center of the three electrode receivers 2A, 2, and 2a of the starter 2, as shown in FIG. 3, to prevent uneven thickness of the case 8. The projecting piece 5c has a convex stepped part 5d, and the tip is inserted into the slot 8b to guide the installation, and the stepped part f? Case 8 in B5d. That is, it supports the starting device 2.b. The protective cover 5 has a hollow protrusion 5
e to support the back surface 8c of the case 8. By providing a boss 8d on the back surface 8C of the case 8 that fits into the hollow rib, the starting device and the protective cover 5 can be more easily and securely attached.

On the other hand, a substantially T-shaped rib 5f is provided at the lower part of the protective cover 5 to which the overload protection device 4 is attached, and a lead wire extraction hole 5g is provided.

In the above structure, the assembly procedure is such that the starting device 2 and overload protection device 4 can be automatically assembled and automatically tested independently at a manufacturer specializing in electrical parts. After installing the load protection device 4, it may be installed as an integral part to the compressor. Terminal 1 for each of starting device 2 and overload protection device 4
1゜13 is an insertion type Faston terminal, so there is no need for soldering or screwing, making it easy to test the characteristics of one part and connect lead wires during assembly. In addition, to attach the starting device [2 to the protective cover 5, insert the rib 5b of the protective cover 5 into the groove 8a of the case 8.
, 5b are fitted and pushed in, the protruding piece 5C fits into the slot 8b along the radial back surface 8C of the case 8, and the starting device V1
．． 2 is up, down, left and right.

Ribs 5b, 5b, and protruding pieces 5c of the cover 5 that protects the back surface.

It is held or supported by the stepped portion 5d and the hollow projecting piece 58, and is integral with the protective cover 5'11? It is something that

Similarly, the overload protection device 4 only needs to be inserted between the T-shaped rib 5f and the lower side of the protective cover 5.

In terms of performance, the starting device 2 is connected to the electrode +3- and is held between or supported by the protective cover 5 in winter, so the protective cover 5 is fixed to the mounting foot 12 by the pressing spring 6. As a result, there is no risk of the contact noise between the starting device and the protective cover 5 occurring, and the electrode rod 3 and fl!
There is no possibility that the electrical connection portion of the pole support 2a will become loose due to compressor vibration or that poor contact will occur. Furthermore, since the protective cover 5 has the opening Sa in contact with the outer shell 1 and has no holes other than the lower lead cotton outlet 5g, there is no risk of water entering the 3 parts of the electrode rod, which are vulnerable to water injection tests. There is no need to provide a waterproof protector on the outer shell 1.

Furthermore, since the protective cover 5 is cut out in the horizontal direction to the opening 5a, there is no reverse tapered part, so there is no need to split the mold, and since the protective cover 5 has good moldability, it is not only inexpensive but also has good flame retardancy. It can be easily molded into plastic.

〔Effect of the invention〕

As described above, the present invention starts with the upper part of the box-shaped protective cover 5 which has an opening 5a at one end! 11 device 2, an overload protection device 4 is housed in the lower part, the opening 5a is pressed against the compressor outer shell 1 by a pressing spring 6, and a convex protrusion 5C is provided approximately in the center of the protective cover 5. The starting device 2 is fitted into the slot 8b of the case 8 of the starting device 2 (Ix), and the starting device 2 is locked to the protective cover 5. It is attached to the compressor outer shell 1 as one piece, which simplifies the installation work and facilitates automation.It also has excellent waterproof and vibration resistance, and has a small number of parts, making it easy to manufacture the protective cover 5. Therefore, it is possible to provide an inexpensive electrical equipment protection device.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing one embodiment of the electrical protection device of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an exploded perspective view of the components of a conventional example, and Fig. 4 The figure is a sectional view taken along the line BB in FIG. 3. 1... Compressor outer shell, 2... Starting device, 3... Electrode rod. 4... Overload protection device, 5... Protective cover, 5a.
...opening, 5b...rib, 5c...protrusion, 5e...
...Hollow protrusion 6...Press spring, 8...Case, 8c
...Back of the case. 10... Leaf spring, 11... Terminal. I l・

Claims (1)

[Claims] 1. A presser foot, comprising a protective cover with an opening at one end, a starting device and an overload protection device housed within the protective cover, and pressing the opening against the compressor outer shell. An electrical equipment protection device characterized in that a spring and a protrusion that fits into a hole in a case in which the starter is housed are provided approximately in the center of the protective cover. 2. The electrical equipment protection device according to claim 1, wherein the hole is located approximately at the center of the electrode holder of the starter.