JPS63179183A - Attachment structure of motor protector in compressor - Google Patents

Abstract

PURPOSE:To easily mount a motor protector and improve the reliability of the operation of a closed type compressor by a sticking and holding a motor protector to the internal fixture of a closed terminal which is stuck to the closed housing of the compressor. CONSTITUTION:A motor protector 4 which is equipped for a closed type compressor acts as a sensor which operates on both electric current and temperature to protect a motor 2 used as the driving source of a motored compressor 1 housed in a closed housing 3 from heat. In this case, the motor protector 4 which consists of a glass case is held by an approximately U-shaped fixture 13 attached to a closed terminal 6 which is stuck to the closed housing 3, and wired between the outlet 8 from the wound wire end 5 of a motor 2 and the pin terminal 10 of the closed terminal 6. One terminal of a lead wire 11 drawn from the protector 4 is connected to the pin terminal 10 and the opposing terminal is connected to the outlet wire 8. The fixture 13 is mounted in such a way that the longitudinal axis of the protector 4 is approximately at right angles with the pin terminal 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mounting structure for a motor protection device of a hermetic compressor used in a refrigeration device such as a refrigerator or an air conditioner.

BACKGROUND OF THE INVENTION In recent years, the mounting structure for motor protection devices has been such that the motor protection device is installed at the end of the winding of the motor inside the hermetic container of a hermetic compressor, and only the starting device is provided outside the container. Electrical wiring is easy when installing a hermetic compressor to a refrigeration system.
In addition, a structure is being developed that allows this to be carried out reliably.

An example of a mounting structure for the above-mentioned conventional motor protection device will be described below with reference to the drawings.

FIG. 4 shows a schematic diagram of a conventional motor protection device mounting structure. In FIG. 4, reference numeral 1 denotes an electric compressor housed in a closed container 3 using an electric motor 2 as a power source.

The motor protection device 4 is wound directly onto the winding ends 5 of the motor 2. The sealed terminal 6 is fixed to the airtight container 3, and one side is connected to the electric motor 2 through a lead wire 8 from a frame body 7 containing a terminal (not shown), and further through the motor protection device 4, and the other side is connected to the electric motor 2. Electrical equipment 9 equipped with is directly attached.

The mounting structure of the motor protection device configured as above will be explained below. A motor protection device 4 provided in the hermetic compressor is directly wound around the winding end portion 6 of the motor 2 to protect the motor 2 from overheating. When a hermetic compressor applied to a refrigeration system is used under conditions such as overload, abnormal voltage, and high outside temperature, the electric compressor 1 is overheated and the electric motor 2 is also overheated at the same time.

At this time, the motor protection device 4 was directly wrapped around the winding end 5.
is configured to detect the current flowing into the motor 2 and the ambient temperature at the winding end 5 to protect the motor 2 from overheating.

Problems to be Solved by the Invention However, in the above configuration, the motor protection device is directly wrapped around the winding ends of the motor, which increases the number of man-hours, complicates installation work, and increases costs. There was a problem in that a defect in the motor protection device resulted in a defect in the motor.

In view of the above-mentioned problems, the present invention provides a method for simplifying the mounting structure of a motor protection device and simplifying workability.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a sealed terminal fixed to a sealed container and a fixture provided in one of the bottle terminals constituting the sealed terminal inside the sealed container. The motor protection device is held such that its long axis is positioned substantially perpendicular to the pin terminal of the sealed terminal.

Effect of the Invention With the above-described configuration, the present invention can eliminate the work required to directly attach the motor protection device to the motor, and the motor protection device can be attached relatively easily, and a defect in the motor protection device can cause a defect in the motor. Things will disappear.

EXAMPLE Hereinafter, a mounting structure for a compressor motor protection device according to an example of the present invention will be described with reference to the drawings. Components that are the same as those of the prior art are designated by the same reference numerals and detailed explanations thereof will be omitted. FIG. 1 shows a mounting structure of a motor protection device according to an embodiment of the present invention. A motor protection device 4 made of a glass case is held by a substantially U-shaped fixture 1-3 attached to a sealed terminal 6 fixed to the airtight container 3, and the end portion of the motor 20 windings is held by a substantially U-shaped fixture 1-3. It is wired between the sunrise wire 8 pulled out from the side 5 and the bottle terminal 10 of the sealed terminal 6. One end of the lead wire 11 drawn out from the motor protection device 4 is connected to the bin terminal 10, and the other end is connected to the lead wire 8. Other 2 of the Hiji Line 8
The book is connected to the other two bin terminals 1o via pin insertion terminals 12, respectively. FIG. 3 is a detailed view of the installation of the sealed terminal 6 and the substantially U-shaped fixture 13. The fixture 13 is attached so that the long axis of the motor protection device 4 is substantially perpendicular to the pin terminal 1o.

The installation configuration of the motor protection device configured as described above will be explained.

The operating principle of the motor protection device is the same as the conventional one, and the explanation thereof will be omitted. When assembling the compressor, the electric compressor 1 is set in the sealed container 3, and is fixed to the motor protection device 4 by the substantially U-shaped fixture 13 provided on the bottle terminal 10 of the sealed terminal 6. , connect one end of the lead wire 11 drawn out from the motor protection device 4 to the pin terminal 10.
Then, the other end is connected to the lead wire 8 drawn out from the winding end 5. The other two of the Hiji wires are connected to the other two of the bin terminals via the pin insertion terminals 12, respectively.

As described above, according to this embodiment, the motor protection device 4 is attached to the U-shaped fixture 13 provided in one of the bin terminals 1o inside the airtight container 3, so that the motor protection device 4 is attached to the U-shaped fixture 13 with its long axis By holding the terminal 6 so as to be positioned approximately at right angles to the pin terminal 10, the motor protection device 4 can be easily attached and detached at the appropriate time when assembling the hermetic compressor. The cost is reduced, and a defect in the motor protection device 4 does not cause a defect in the electric motor 2. Furthermore, the storage space for the motor protection device 4 can be made relatively small. Since the heat of the bin terminal 10 is sensed by the protection device 4, the winding can be reliably protected.

Effects of the Invention As described above, the present invention provides a motor protection device that is attached to the long axis of a sealed terminal that is fixed to a sealed container and a fixing device that is provided inside one of the bottle terminals that constitute this sealed terminal. By holding the terminal so that it is positioned almost perpendicular to the pin terminal of the sealed terminal, it is possible to install several motors at a relatively low cost, and a defect in the motor protection device does not become a defect in the motor. The storage space for the protection device can be reduced, and the heat sensing ability of the protection device is not impaired.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a compressor equipped with a motor protection device mounting structure according to an embodiment of the present invention, Fig. 2 is a partial detailed view of Fig. 1, and Fig. 3 is a view taken in the direction of arrow A in Fig. 2. , FIG. 4 is a sectional view of a conventional compressor. 3... Airtight container, 4... Motor protection device, 6... Sealed terminal, 10... Pin terminal, 13... Abbreviation U Glyph fixtures. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
! tEfl Container 4 - Electric #: Grand protection device 6 - Sealed terminal 10 - Bin terminal Fig. 1 6 - Sealed terminal Fig. 4

Claims (1)

[Claims] It has a sealed terminal fixed to a sealed container, and a motor protection device is attached to a fixture provided inside one of the pin terminals constituting this sealed terminal inside the sealed container, and the long axis of the motor protection device is attached to the pin terminal of the sealed terminal. A mounting structure for a compressor motor protection device, characterized in that the motor protection device is held at a substantially right angle.