Refrigerant compressor
A compressor and refrigerant technology, applied in refrigerators, compressors, irreversible cycle compressors, etc., can solve problems such as cracks at the end of the slot insulating film, reduction in ground capacity, and damage to the insulation of the rotor core.
Inactive Publication Date: 2003-11-26
PANASONIC CORP
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However, as a result of this, the amount of coils that can be inserted into the slot is limited, so as the efficiency of the motor is improved, the effect of reducing the electrostatic capacity due to the thickness of the slot insulating film or the multiple structure has reached its limit.
[0007] On the other hand, when polyethylene naphthalate (hereinafter referred to as PEN) with a low dielectric constant is used as an insulating film for refrigerant compressor tanks, these materials are stable in refrigerant or lubricating oil, and are less resistant to corrosion. Good results can be achieved in terms of ground capacitance. However, in terms of mechanical properties, especially because of its low tear strength, when the coil is inserted into the slot at the beginning, cracks will occur at the end of the slot insulation film, which may cause subsequent embedding. The coils are exposed, which damages the insulation of the stator and rotor cores
[0008] Therefore, in view of the problem that the traditionally used electric motor slot insulation film is difficult to reduce the capacitance to ground, the object of the present invention is to provide a refrigerant compressor with the following slot insulation film structure, which can improve the efficiency of the motor The electrostatic capacity achieved at the time does not hinder the use of refrigerant compressors
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[0017] In this example, for figure 2 An example in which PEN is used for the inner trench insulating film 10A and PET is used for the outer trench insulating film 10B will be described.
[0018] exist figure 1 , figure 2 Among them, 1 is an airtight container. An electric motor 4 composed of a stator 2 and a rotor 3 is installed inside the airtight container 1 . Compression device 5 (refer to image 3 ) is set at the lower part of the motor. In addition, a plurality of slots 9 are formed along the inner peripheral edge of the stator 2 and extending in the axial direction.
[0019] Such as figure 2 As shown, a slot insulating film 10 composed of a slot inner insulating film 10A and a slot outer insulating film 10B made of materials having different dielectric constants is laminated and inserted into each slot 9, and a coil 11 is provided in the slot insulating film 10. For example, in the case of a 3-phase 4-pole motor as shown in the figure, where there are 24 slots ...
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A refrigerant compressor is composed of compressing mechanism and electric motor, which are held in an enclosed container, and features that inside and outside insulating films with different dielectric constants are inserted into multiple slots formed axially at internal periphery of motor stator, resulting in higher efficiency of motor and high static capacitance to ground, which does not affect the compressor.
Description
technical field [0001] The present invention relates to a refrigerant compressor which can be built into, for example, air conditioners, refrigerators and the like. Background technique [0002] Traditional refrigerant compressors are described below image 3 As shown, a motor 4 composed of a stator 2 and a rotor 3 is arranged in a closed container 1, a compression device 5 is arranged below the motor 4, and an accumulator (liquid separator) is arranged on the suction pipe 6 of the compression device 5 7. A discharge pipe 8 is provided on the upper part of the airtight container 1 . [0003] Recently, due to the demand for energy saving, such refrigerant compressors incorporated in air conditioners and refrigerators have been strongly required to improve the efficiency of the compressor. Therefore, it is required to improve the efficiency of the motor as well as the efficiency of the compression mechanism. [0004] To improve the efficiency of the motor, the main measure is...
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Inventor 坪川正浩
Owner PANASONIC CORP