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Variable-capacity compressor

A variable type, compressor technology, used in liquid variable capacity machinery, mechanical equipment, non-variable capacity pumps, etc., can solve the problem of damage silence, damage to the sealing of the casing 93 and the capacity control valve 90, and high costs, etc. question

Inactive Publication Date: 2013-01-23
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, even with this compressor, the assembly process and the unit price of the parts are correspondingly increased due to the seal 92, so that the high cost cannot be avoided.
In addition, when such a compressor is used for a long period of time, the seal 92 may deteriorate, thereby possibly impairing the quietness, and the sealing of the case 93 and the capacity control valve 90 may also be damaged.

Method used

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  • Variable-capacity compressor
  • Variable-capacity compressor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ）

[0038] Such as figure 1 As shown, the capacity variable compressor of the first embodiment has a cylinder block 1 including a plurality of cylinder bores 1 a formed concentrically in the cylinder block 1 in parallel at equal angular intervals. The cylinder block 1 is sandwiched between the front housing 3 and the rear housing 5 to be fastened in this state. A crank chamber 9 is formed inside by the cylinder block 1 and the front housing 3 .

[0039] A shaft hole 3 a is formed in the front housing 3 , and a shaft hole 1 b is formed in the cylinder block 1 . The drive shaft 11 is rotatably supported by the shaft holes 3a, 1b via the shaft seal device 9a and the bearing devices 9b, 9c. The pulley 13 is provided on the front case 3 via a bearing device 3b. The pulley 13 is fixed to the drive shaft 11 . A belt 13 c driven by an engine and a motor of the vehicle is wound around the pulley 13 . In addition, an electromagnetic clutch may be provided instead of the pulley 13 .

...

no. 2 approach ）

[0065] The compressor of the second embodiment adopts Figure 5 and Image 6 The snap ring 51 is shown. The engagement portion 51a of the snap ring 51 has a continuously curved small-diameter portion 51b and a large-diameter portion 51c. Fitting holes 51f and 51g for reducing the diameter are formed through the wide portions 51d and 51e. A portion of the small-diameter portion 51b that is bent relative to the large-diameter portion 51c forms a cutout 51h that avoids contact with the cap 30 of the capacity control valve 2 . The gap C formed by the notch 51h is a vibration transmission suppressing means and a contact area reducing means. That is, the cutout 51h suppresses the transmission of vibration by reducing the contact area between the cover 30 and the snap ring 51 . Other structures are the same as those of the first embodiment.

[0066] Also in the second embodiment, the same effects as those of the first embodiment can be achieved.

no. 3 approach ）

[0068] Such as Figure 7~9 As shown, the compressor of the third embodiment adopts Figure 15 and Figure 16 A common snap ring 91 is shown, and a new cover 31 is used. Such as Figure 8 As shown, recessed portions 31 b and 31 c are arranged on both sides of a surface 31 a of the cover 31 that faces the snap ring 91 . The recesses 31 b , 31 c prevent contact between the cover 31 and the snap ring 91 . The gap C formed by the two recesses 31b, 31c is a vibration transmission suppressing means and a contact area reducing means. That is, the recesses 31b, 31c suppress transmission of vibration by reducing the contact area between the cover 31 and the snap ring 91 . Other structures are the same as those of the first embodiment.

[0069] Also in the third embodiment, the same operation and effect as the first embodiment can be achieved. In particular, in the compressor of the third embodiment, the snap ring 91 is a common component, and only the cap 31 of the displacement cont...

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Abstract

The disclosed variable-capacity compressor is provided with a capacity control valve (2) that can change the degree to which an air-supply passage (44, 46) is open between a valve seat (VS) and a valve body (VB), thereby changing the pressure in a crank chamber (9). The capacity control valve (2) is contained within a control-valve chamber (5c) in a rear housing (5) and fixed in place by means of a circlip (50). A notch (50g) is formed between the capacity control valve (2) and the circlip (50) and / or between the circlip (50) and the rear housing (5). A gap (C) formed by the notch (50g) and the like inhibits the transmission of vibrations caused by impacts between the valve seal (VS) and the valve body (VB). This makes the variable-capacity compressor quiet, reduces costs by obviating the need for a separate member, and results in excellent durability.

Description

technical field [0001] This invention relates to capacity control valves. Background technique [0002] In a general variable capacity compressor, a suction chamber, a crank chamber, and a discharge chamber are formed in a casing, and a control valve chamber is provided. A displacement control valve is housed in the control valve chamber via an O-ring, and the displacement control valve is fixed by a circlip. The passage in the displacement control valve connecting the discharge chamber and the crank chamber is provided with a valve seat and a valve core. The displacement control valve can change the opening degree of the passage between the valve seat and the valve element by using, for example, PWM (Pulse Width Modulation) control to change the pressure of the crank chamber. [0003] The variable capacity compressor described above is used in an air conditioner for a vehicle. For example, if the opening of the passage is increased by PWM control when the vehicle accelera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B27/14F04B39/00F16B21/18F16F1/18F16F15/02F16F15/06
CPCF16F15/02F04D29/00F16B21/183F04B27/14F04B27/1804F16F15/085F04B27/0821F04B27/0852F04B27/0873F04B27/0891F04B27/1036F04B27/1081F04B39/0044F04B39/14
Inventor 桥本友次野村和宏仲井间裕之渡边靖
Owner TOYOTA IND CORP