JPH09228963A - Protecting device for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve mounting work efficiency and an operating speed relating to an abnormal temperature rise. SOLUTION: A device has a plurality of receptacles 4a to 4c connected to be fitted to a plurality of conductive pins 3a to 3c protruded to outside a closed vessel, a waterproofing female connector 4e, disk-shaped bimetal 4d interposed between the single receptacle 4c and the waterproofing female connector 4e to be reversely operated by a preset temperature and current and an electric insulation case 4f constituted by storing these receptacles 4a to 4c and bimetal 4d also providing the waterproofing female connector 4e in a side surface so as to connect the conductive pins 3a to 3c to the receptacles 4a to 4c by mounting in the closed vessel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor protection device.

[0002]

2. Description of the Related Art A conventional compressor protection device for an air conditioner will be described with reference to FIGS.

In FIG. 6, 11 is a compressor in which an electric element and a compression element are arranged inside a closed container, and 12 is a motor of the electric element. The conductive pin 13 (13 a to 13 c) and the compressor pin 14 are projected outside the closed container of the compressor 11. Reference numeral 15 is a protective device, which is a normally closed bimetal 1.
5a (see FIG. 7) is incorporated and a connection terminal 15b for connecting to the AC power source and the motor 12 is provided. Each conductive pin 13 has a faston terminal 16 (16a to 16a).
c) is connected, and the lead wire 17 extending from the faston terminal 16 is connected to the connection terminal 15b of the protection device 15, the operating capacitor, and the AC power supply. 18
Is a terminal cover, which is fixed to the compressor pin 14 with a fixing screw 19 while the protective device 15 and the faston terminal 16 are housed inside.

In FIG. 7, the motor 12 has a main winding 12a.
And the auxiliary winding 12b and a rotor (not shown). The main winding 12a is connected to the conductive pins 13a and 13b and the auxiliary winding 12b.
Are connected to the conductive pins 13a and 13c. Further, the faston terminal 16a is connected to the AC power source 2 via the protection device 15.
1, the Faston terminal 16b is connected to the AC power supply 21, and the Faston terminal 16c is connected to the AC power supply 21 via the operating capacitor 20.

A method of mounting the protective device having the above-described structure will be described. A lead wire 17 for connecting to the AC power source 21 and the main winding 12a of the motor 12 is soldered to the connection terminal 15b of the protective device 15 in advance. And place this protection device 15 on a flat surface above the outer shell of the compressor 11,
Faston terminal 1 crimped to the tip of one lead wire 17
6a is connected to the conductive pin 13a, and the other lead wire 17 is connected to the AC power source 21.
The lead wires 17 extending from the Faston terminals 16b and 16c connected to the terminals b and 13c are connected to the AC power supply 21 and the operating capacitor 20. Then, a terminal cover 18 is covered from above so as to cover the protection device 15 and each faston terminal 16, and is fixed to the compressor pin 14 with a fixing screw 19.

Next, the operation will be described. When the AC power supply 21 is turned on, a current flows through the motor 12, the protection device 15, and the operating capacitor 21, and the compressor 11 enters a steady operation state. On the other hand, if the compressor 11 is in an overload state during operation and an overcurrent flows in the compressor 11 or the outer temperature of the compressor 11 becomes abnormally high, the bimetal 15a of the protection device 15 attached to the outer shell of the compressor 11 is heated. It deforms and reverses, shuts off the current to the motor 12, and stops the operation of the compressor 11.

[0007]

However, in the above-mentioned conventional configuration, the protection device 1 is installed before the protection device 15 is mounted.
5, the lead wire 17 is soldered, then the lead wire from the protector 15 is connected to the conductive pin 13 of the compressor 11, and the protector 15 is attached to a flat part of the outer casing of the compressor. It is necessary to perform a troublesome work of covering and fixing 18 and there has been a problem that the efficiency of the mounting work is poor.

Further, a protective device 15 having a bimetal 15a built therein is attached to the outer shell of the compressor 11, and the protective device 15 is installed.
Also, since the terminal cover 18 having a large inner volume that covers the faston terminal 16 is used, heat transfer to the bimetal 15a is slow, and there is a problem that the operation is delayed due to an abnormal temperature rise of the compressor 11.

In view of the above-mentioned conventional problems, the present invention can improve the mounting work efficiency and the operation speed against an abnormal temperature rise,
It is also an object of the present invention to provide a compact compressor protection device.

[0010]

SUMMARY OF THE INVENTION A compressor protection device of the present invention is a compressor protection device in which an electric element and a compression element are arranged inside a closed container made of a metal container having good thermal conductivity. , A plurality of receptacles respectively fitted and connected to a plurality of conductive pins protruding outside the closed container, a waterproof female connector, and a set temperature and current interposed between one receptacle and the waterproof female connector. An electrically insulative case configured to accommodate a reversing disk-shaped bimetal, a receptacle and a bimetal, a waterproof female connector provided on the side surface, and a conductive pin and a receptacle to be connected by attaching to a closed container. With the, the protective device can be attached by attaching the case to the closed container to improve work efficiency. Rapidly being thermally conductive to improve the operating speed to an abnormal temperature rise, and configuration also becomes compact through the conductive pins and the receptacle.

Further, by disposing a second bimetal which reverses at a set temperature or higher, in series between the conductive pin and the disk-shaped bimetal, the winding temperature rises due to gas leakage of the compressor or the like. Even if this second
The bimetal inverts, opening the electrical circuit to the compressor and speeding up the protective action of the compressor.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A compressor protection device according to an embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, reference numeral 1 is a compressor in which an electric element and a compression element are arranged inside a closed container made of a metal container having good heat conductivity, and 2 is a motor of the electric element. Conductive pins 3 a to 3 c are projected on the outer contour of the compressor 1. Reference numeral 4 denotes a protective device attached to the outer shell of the compressor, and as shown in detail in FIG. 3, receptacles 4a to 4c which are directly fitted and connected to the conductive pins 3a to 3c, respectively.
And a disk-shaped bimetal 4d that reverses at a set temperature and current and a waterproof female connector 4e are integrally molded and held in an electrically insulating case 4f made of an electrically insulating material such as phenol resin. Is configured. The waterproof female connector 4e is disposed on the side surface of the case 4f, and the receptacles 4a to 4c are disposed so as to be connected to the conductive pins 3a to 3c by mounting the case 4f in a closed container.

A mounting portion 4g having a through hole is formed on one side of the case 4f, and the compressor 1 is attached to the mounting portion 4g.
The protective device 4 is attached to the outer shell of the compressor 1 by inserting the compressor pin 5 projecting from the outer shell of the compressor and fixing the case 4f with the fixing screw 6 screwed to the compressor pin 5. ing.

The receptacles 4a and 4b are directly connected to the waterproof female connector 4e. The receptacle 4c is connected to one side of the contact of the bimetal 4d, and the other side of the contact is connected to the waterproof female connector 4e. A waterproof male connector 7 can be connected to the waterproof female connector 4e,
The waterproof male connector 7 is connected to the AC power supply 8 and the driving capacitor 9.

Explaining the mounting method of the protective device 4 having the above-described structure, the mounting portions 4g of the case 4f are fitted while the receptacles 4a to 4c of the protective device 4 are directly fitted to the conductive pins 3a to 3c of the compressor 1. The compressor pin 5 projecting from the outer contour of the compressor 1 is inserted into the casing, and the case 4 is fixed with the fixing screw 6.
By fixing f to the outer shell of the compressor 1 and connecting the waterproof male connector 7 to the waterproof female connector 4e, the mounting of the protection device 4 is completed.

Next, the operation will be described. When the AC power supply 8 is turned on, a current flows through the motor 2, the protection device 4, and the operating capacitor 9, and the compressor 1 enters a steady operation state. On the other hand, when the compressor 1 is in operation, for example, when an overload state occurs, an overcurrent flows through the compressor 1, or the outer shell reaches an abnormal temperature, the bimetal 4d of the protection device 4 attached to the outer shell of the compressor 1 is pressed.
Is thermally deformed and inverted, the power supply to the motor 2 is cut off, the operation of the compressor 1 is stopped, and the compressor 1 is protected.

Next, another embodiment of the present invention will be described with reference to FIGS. It should be noted that the description of the same components as those of the embodiment of FIGS. 1 to 3 will be omitted, and only the differences will be described.

In the present embodiment, a plate-shaped second bimetal 5h which reverses at a set temperature or more is connected in series between the receptacle 4c connected to the conductive pin 3c and the disk-shaped bimetal 4d. There is.

According to the configuration of this embodiment, the AC power source 8
When is turned on, a current flows through the motor 2, the protective device 4, and the operating capacitor 9, and the compressor 1 enters a steady operation state. On the other hand, during operation of the compressor 1, even when abnormal heating occurs due to, for example, gas leakage or the like that a current higher than the set current does not flow, the second bimetal 4h reversely operates due to the temperature rising above the set temperature and the motor 2 Is turned off to stop the operation of the compressor 1 and protect the compressor 1.

[0021]

According to the compressor protection device of the present invention, since the protection device can be mounted by mounting the case on the closed container, the working efficiency is improved, and the bimetal can be quickly mounted through the conductive pin and the receptacle. Since the heat is conducted to, the operating speed against an abnormal temperature rise is improved and the structure can be made compact.

In addition, a reversing operation is performed in series between the conductive pin and the disk-shaped bimetal when the temperature exceeds a set temperature.
By disposing the bimetal, it is possible to improve the protection performance of the compressor against a temperature rise due to gas leakage of the compressor.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a compressor to which a protection device of the present invention is applied.

FIG. 2 is a circuit diagram of the same embodiment.

FIG. 3 is an enlarged cross-sectional view of the protection device of the same embodiment.

FIG. 4 is a vertical cross-sectional view of another embodiment of the compressor protection device of the present invention.

FIG. 5 is a circuit diagram of the same embodiment.

FIG. 6 is a vertical cross-sectional view of a conventional compressor protection device.

FIG. 7 is a circuit diagram of the conventional example.

[Explanation of symbols]

 1 Compressor 2 Motor 3a-3c Conductive Pin 4 Protective Device 4a-4c Receptacle 4d Bimetal 4e Waterproof Female Connector 4f Case 4h Second Bimetal

Claims (2)

[Claims] 1. A protector for a compressor in which an electric element and a compression element are arranged inside a closed container made of a metal container having good heat conductivity, each of which is provided on a plurality of conductive pins protruding outside the closed container. A plurality of receptacles to be mated and connected, a waterproof female connector, a disc-shaped bimetal which is interposed between one receptacle and the waterproof female connector, and which performs a reversing operation according to a set temperature and a current, and these receptacles and bimetals. A protective device for a compressor, which is provided with a waterproof female connector on a side surface and an electrically insulating case configured to connect the conductive pin and the receptacle by being attached to an airtight container. . 2. The compressor protector according to claim 1, further comprising a second bimetal arranged in series between the conductive pin and the disk-shaped bimetal so that the second bimetal reverses at a set temperature or higher.