CN100441871C

CN100441871C - Eccentric piston device for sealed rotary compressor

Info

Publication number: CN100441871C
Application number: CNB03130205XA
Authority: CN
Inventors: 李宰烈
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-06-17
Filing date: 2003-06-17
Publication date: 2008-12-10
Anticipated expiration: 2023-06-17
Also published as: CN1566685A

Abstract

The present invention relates to an eccentric piston device for a sealed rotary compressor, which belongs to the field of a compressor. The present invention is composed of a piston joint part, an eccentric fixation piston and a piston joint plug, wherein the piston joint part is positioned on the peripheral surface of a rotating shaft arranged in the inner side of the compression space of a compressor cylinder, and is formed with the rotating shaft into a whole body in a concentric way; the piston joint part is larger than the diameter of the rotating shaft; the eccentric fixation piston can be in connection or analysis connection with the piston joint part, and is in eccentric formation towards one side so that the inner part of the compression space, and the piston joint part can rotate in a whole body, and cooling medium gas is compressed simultaneously; the eccentric fixation piston is fixed on the piston joint part by the piston joint plug. Thus, when the compressor capacity is increased, the piston joint part at the rotating shaft is used and the eccentric fixation piston which can adapt to the capacity variation is replaced; simultaneously, the fixing method of the piston joint plug is used for the capacity variation; consequently, the compressor capacity can be changed simply and easily.

Description

The offset piston device of hermetic rotary compressor

Technical field

The invention belongs to compressor field, relate to a kind of hermetic rotary compressor.Say exactly the design of the change piston that carries out about changing compressor capacity in further detail, the invention of the offset piston device of the hermetic rotary compressor that the capacity that changes compressor is become be more prone to.

Background technique

In the freezing cycle device as electrical equipment such as air regulators, its refrigerant compresses employed hermetic rotary compressor as shown in Fig. 1, Fig. 3, below just it is carried out simple explanation.

As shown in the figure, the hermetic rotary compressor in past, its inside that has the seal container 1 of free space is equipped with the motor 4 that is made of rotor 2 and stator 3, and running shaft 5 is fixed among the axis hole 2a that the central vertical direction that is inserted in above-mentioned rotor 2 forms.

And integral body is formed with eccentric part 6 on the underpart of above-mentioned running shaft 5, is inserted with the rolling piston 7 that carries out rotation and revolution on the outside of its eccentric part 6.For forming the compression volume 8 of compression refrigerant gas, design has the compression mechanical portion 12 by cylinder body 9 and upper and lower part bearing 10,11.

On outlet one side of the discharge orifice 10a that forms on the upper bearing 10, can adverse current for compressed cold media air is discharged out not, valve assembly body 15 is installed.The top of its valve assembly body 15 is equipped with the baffler 16 of subduing noise.

And on the suction port 9a of above-mentioned cylinder body 9 side, connection is equipped with gas-accumulating tank 17, and snorkel 18 utilizes connection mouth 19 to carry out connection.Be equipped with on above-mentioned seal container 1 top, compressed high pressure refrigerant gas in compression mechanical portion 12 is discharged into outside discharge pipe 20.

As shown in Figure 2, on above-mentioned cylinder body 9 inner peripheral surfaces, be formed with the discharging port 8a that is communicated with the discharge orifice 10a above the upper bearing 10, and, between the discharging port 8a and suction port 9a in above-mentioned cylinder body 9 inboard compression spaces 8, have and utilize spring 21 flexibly closely to be connected washer 22 on rolling piston 7 outer circumferential faces, its inboard is divided into the high-voltage section of the low voltage section that sucks refrigerant and discharging refrigerant.

The symbol 16a that does not describe among the figure is the hole of passing through that forms on baffler 16.

For the old-fashioned hermetic rotary compressor that as above constitutes, if connect power supply to it, just the rotor 2 of motor 4 is rotated, the running shaft 5 that is inserted in its rotor 2 also is rotated.

Utilize the rotation of running shaft 5, form eccentric part 6 in running shaft 5 underparts, be rotated with the rolling piston 7 that is connected on the eccentric part 6, and, by the suction port 9a of cylinder body 9, be the compressing refrigerant gas that is drawn into inner low-temp low-pressure the cold media air of High Temperature High Pressure.

Compressed cold media air is discharged out by valve assembly body 15, by baffler 16 pass through hole 16a, be discharged into the inside of seal container.Pass through the slit between rotor 2 and the stator 3 again, be discharged into the outside by discharge pipe 20.

But, as above the old-fashioned hermetic rotary compressor of Gou Chenging needs as foundation, the increase capacity, just must change the size of each part, at this moment, if the internal diameter of change cylinder body 9, the eccentric part 6 of its running shaft 5 with its eccentric part 6 on the rolling piston 7 that is connected also must change, so that produced the problem that makes work become complicated.

Summary of the invention

For addressing the above problem the present invention who proposes, its objective is for the become offset piston device of simple hermetic rotary compressor of a kind of work that makes the change compressor capacity is provided.For realizing the object of the invention, design and provide a kind of offset piston device of hermetic rotary compressor, above-mentioned offset piston device, include: the running shaft that is fixed on compressor built-in motor rotor center, it is characterized in that: on the running shaft outer circumferential face of the compression volume inboard that is positioned at compressor casing, also whole be formed with external diameter bigger than the diameter of running shaft, with concentric combine, the piston combining part independently of running shaft; Can decompose to be connected on the above-mentioned piston combining part and and be formed centrally so that offset piston inner at compression volume and the whole rotation of piston combining part while compression refrigerant gas to a lateral deviation.

Above-mentioned offset piston utilizes piston in conjunction with being fixed on the above-mentioned piston combining part with bolt.

Advantage and good effect: identical as top detailed description, the offset piston device of hermetic rotary compressor of the present invention, it is when increasing compressor capacity, on the piston combining part of running shaft, the offset piston of the cylinder body capacity that was modified with correspondence is replaced, utilize piston to deal with volume change, therefore, have the effect that simply easily to change compressor capacity in conjunction with the method that fixes with bolt.

Description of drawings

Fig. 1 is the construction profile of old-fashioned hermetic rotary compressor.

Fig. 2 is the sectional drawing of A-A ' among Fig. 1.

Fig. 3 is the schematic representation of old-fashioned rolling piston.

Fig. 4 is the sectional arrangement drawing that utilizes the hermetic rotary compressor of offset piston device of the present invention.

Fig. 5 is the sectional drawing of B-B ' among Fig. 4.

Fig. 6 is the schematic representation of offset piston of the present invention.

Among each figure:

1: seal container, 2: rotor,

2a: axis hole, 3: stator,

4: motor, 5: running shaft,

6: eccentric part, 7: rolling piston,

8: compression volume, 8a: the discharging port,

9: cylinder body, 9a: suction port,

10: upper bearing, 10a: discharge orifice,

11: lower bearing, 12: compression mechanical portion,

15: valve assembly body, 16: baffler,

16a: by hole, 17: gas-accumulating tank,

18: snorkel, 19: connection mouth,

20: discharge pipe, 21: spring,

22: washer, 101: seal container,

102: rotor, 102a: axis hole,

103: stator, 104: motor,

105: running shaft, 106: eccentric part,

109: cylinder body, 109a: suction port,

110: upper bearing, 110a: discharge orifice,

111: lower bearing, 112: the offset piston device,

113: compression mechanical portion, 118: snorkel,

119: connection mouth, 121: compression volume,

122: piston combining part, 123: offset piston,

123a: eccentric part, 123b: keyhole,

124: piston is in conjunction with using bolt, 131: gas-accumulating tank,

132: discharge pipe, 133: the valve assembly body,

134: baffler, 134a: by the hole,

135: spring, 136: washer.

Specific embodiment

Below, with reference to the embodiment of accompanying drawing,, be described in detail utilizing the offset piston device of hermetic rotary compressor of the present invention.

Fig. 4 is the sectional arrangement drawing that utilizes the hermetic rotary compressor of offset piston device of the present invention.Fig. 5 is the sectional drawing of B-B ' among Fig. 4.Fig. 6 is the schematic representation of offset piston of the present invention.

Among the present invention as shown in the figure, the inside that has the seal container 101 of free space in the inboard is equipped with the motor 104 that is made of rotor 102 and stator 103, and running shaft 105 is fixed among the axis hole 102a that the central vertical direction that is inserted in above-mentioned rotor 102 forms.

And for form eccentric part 106 on the underpart of above-mentioned running shaft 105, cylinder body 109 is spirally connected with upper and lower part bearing 110,111, and its compression volume 121 inside have; Be installed on the running shaft 105, rotate simultaneously, be the compressor Machinery Ministry 113 of the offset piston device 112 of compression refrigerant gas with running shaft 105.

Above-mentioned offset piston device 112 is on running shaft 105 outer circumferential faces by compression volume 121 inboards that are positioned at compressor casing 109, wholely forms external diameter than the diameter of running shaft 105 greatly, form concentric, piston combining part 122 independently with running shaft 105; Connect maybe can decompose be connected above-mentioned piston combining part 122 and to a lateral deviation be formed centrally in case compression volume 121 inner with the piston combining part 122 whole rotations eccentric fixed pistons 123 of compression refrigerant gas again simultaneously; And for above-mentioned offset piston 123 being fixed on piston that above-mentioned piston combining part 122 uses in conjunction with constituting with bolt 124.

Above-mentioned offset piston 123, the one side is formed with, and the keyhole 123b of Vertical direction is arranged on the eccentric part 123a inner side surface, and its internal diameter can be inserted into by the size in certain hole on the above-mentioned piston combining part 122.For reducing the wearing and tearing that bring because of friction, should use the material manufacturing of intensity, or when using common material to make, heat-treat.

109a is a suction port among the figure, the 131st, and gas-accumulating tank, the 132nd, discharge pipe, the 133rd, the valve assembly body, the 134th, baffler, 134a are by the hole, the 135th, spring, the 136th, bolt.

After utilizing the hermetic rotary compressor that as above constitutes to be connected power supply, the rotor 102 of motor 104 just is rotated, and the running shaft 105 that is inserted in its rotor 102 also is rotated.And, utilize the rotation of running shaft 105, be connected the offset piston 123 on the piston combining part 122 that running shaft 105 underparts form, touch the state of washer 136 with outer circumferential face, be rotated in compression volume 106 inboards.

If offset piston 123 is rotated, by the suction port 109a of cylinder body 109, just be the compressing refrigerant gas of the low-temp low-pressure that sucks compression volume 121 inside the cold media air of High Temperature High Pressure.

Compressed cold media air is discharged out by discharge orifice 110a in compression volume 121, by baffler 134 pass through hole 134a, be discharged into the inside of seal container 101.Slit through between rotor 102 and the stator 103 is discharged into the outside by discharge pipe 132.

At last, when needs increase the capacity of the compressor of as above working, when increasing cylinder body 109 sizes, increase at the cylinder body 109 inboard compression volumes 121 that form.At this moment, in compression volume 121 inboards, the offset piston device of compression refrigerant is removed piston in conjunction with behind the bolt 124 separating, behind big offset piston 123 combination again, again with piston in conjunction with fixing with bolt 124.Utilize this method can increase capacity simply.

Promptly, increase the capacity of compressor at needs, or during the capacity of minimizing opposite compressor with it, separate and remove piston in conjunction with using bolt 124, the offset piston 123 of cylinder body 109 sizes that were modified with correspondence is replaced simply, like this, and when capacity is changed, whole running shaft need not be replaced, also capacity can be increased simply.

Claims

1. the offset piston device of a hermetic rotary compressor, include: the running shaft that is fixed on compressor built-in motor rotor center, it is characterized in that: on the running shaft outer circumferential face of the compression volume inboard that is positioned at compressor casing, also whole be formed with external diameter bigger than the diameter of running shaft, with running shaft concentric, piston combining part independently; Can decompose to be connected on the above-mentioned piston combining part and and be formed centrally so that offset piston inner at compression volume and the whole rotation of piston combining part while compression refrigerant gas to a lateral deviation.

2. the offset piston device of hermetic rotary compressor according to claim 1 is characterized in that: above-mentioned offset piston utilizes piston in conjunction with being fixed on the above-mentioned piston combining part with bolt.