JPH0538367U - Electric compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the fixing of the thermal protector on the coil end and shorten the length of the lead wire to reduce the amount of oligomer deposition. [Structure] A power supply end of a stator winding is connected to one end of a thermal protector, and the other end is connected to a power supply via a lead wire.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric compressor, in which electric power is supplied from a power supply terminal of a container to a power supply end of a stator winding through a thermal protector, and more particularly to improvement of mountability of a thermal protector.

[0002]

[Prior Art]

 As a conventional electric compressor, there has been a compressor described in Japanese Utility Model Laid-Open No. 2-131083. The one described in this publication consists of a thermal protector body, a lead wire for power supply, and an insulating tube.One of the lead wires is connected to the power supply, and the other is connected to the power supply end of the stator winding. After connecting the protector to the middle of the lead wire, the body of the thermal protector or the insulating tube of the thermal protector was fixed on the coil end with a binding thread.

[0003]

[Problems to be solved by the device]

 In such a conventional electric compressor, in order to connect the thermal protector to the middle of the lead wire, the lead wire connected to the power supply end of the stator winding needs to make a U-turn. Either way, the lead wire would be lengthened because it would be necessary to draw the wire around the coil end for more than half a turn, or the two lead wires would have to be drawn in opposite directions.

For this reason, it is necessary to temporarily arrange the winding and the connecting portion when lacing with the binding yarn at the coil end. In the case where the lead wire is U-turned, it is further to the lead wire final binding portion. However, the thermal protector was not easy to install because it required temporary fitting. Also, as the lead wire became longer, the increase in Eucommia could not be ignored.

The present invention provides an electric compressor in which the lead wire does not become long when the thermal protector is mounted and the thermal protector can be mounted more easily.

[0006]

[Means for Solving the Problems]

 The present invention provides a thermal protector in which a compression element and an electric element are arranged in a container, and an electric power supply end of a stator winding of the electric element is connected to one end and a lead wire is connected to the other end in an electric compressor. It is provided on the coil end of the stator winding and connects the lead wire to the power supply.

[0007]

[Action]

 In the electric compressor of the present invention configured as above, since the thermal protector is connected between the stator winding and the lead wire, the lead wire used when connecting the conventional thermal protector into the lead wire is In addition to being unnecessary, provisional fitting of thermal protectors and binding parts is also unnecessary.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial (half-face) top view of an electric element in a container of an electric compressor. In this figure, 1 is a stator core of an electric element, 2 to 4 are stator windings inserted in slots of the stator core, and 5 is a thermal protector (internal protector), which is housed in an insulating tube 6. It is arranged on the coil ends of the stator windings 2 to 4. Reference numeral 7 denotes a thermal fuse, which is arranged on the coil end together with the thermal protector 5.

Reference numeral 8 denotes a power supply end of the stator winding, which is an end of the stator winding (copper wire). The power supply end 8 is directly connected to one end of the thermal protector 5. In addition, since there are three power supply terminals in a normal single-phase induction motor, the other power supply terminals (two terminals) are connected to the power source via lead wires.

A lead wire 9 connects the other end of the thermal protector 5 and the thermal fuse 7. Reference numeral 11 is a lead wire that connects the thermal fuse 7 and the power supply. Reference numeral 12 denotes a lead wire, which is a bundle of the lead wire and the lead wire 11 connected to the other power supply terminal.

Reference numerals 13 and 14 denote binding yarns, which fix the thermal protector 5 and the thermal fuse 7 on the coil ends of the stator windings 2 to 4. Reference numeral 15 is a binding yarn, which similarly fixes the lead wires 9, 11, 12 on the coil end.

2 and 3 are a side view and a bottom view of the thermal protector 5 shown in FIG. 1, respectively. In these drawings, the insulating tube 6 is made of a transparent member, and the internal thermal protector 5 is visible. Reference numeral 16 is one end of the thermal protector 5, to which the power supply end of the stator winding is connected. Reference numeral 17 is the other end of the thermal protector 5, to which the lead wire 9 is connected.

[0013]

[Effect of the device]

 As described above, in the electric compressor of the present invention, one end of the thermal protector is connected to the power supply end of the stator winding, and the other end is connected to the power supply through the lead wire. No special lead wire is required, and the thermal protector can be easily attached without temporarily fixing the thermal protector or lead wire when binding the coil ends.

Further, since a special lead wire is not necessary, the amount of oligomers deposited from the lead wire can be reduced.

[Brief description of drawings]

FIG. 1 is a partial top view of an electric element showing an embodiment of the present invention.

FIG. 2 is a side view of a thermal protector.

FIG. 3 is a bottom view of the thermal protector.

[Explanation of symbols]

 2-4 Stator winding 5 Thermal protector 6 Insulating tube 9,11 Lead wire 13-15 Bundling yarn 16 One end of thermal protector 17 The other end of thermal protector

Claims (1)

[Scope of utility model registration request] 1. An electric compressor having a compression element and an electric element in a container, comprising a thermal protector having a stator winding of the electric element to which a power supply end is connected to one end and a lead wire is connected to the other end. An electric compressor which is arranged on a coil end of a stator winding and has a lead wire connected to a power supply.