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Dual-sliding vane rotary compressor, control method and application thereof

A rotary compressor and double-sliding vane technology, applied in the field of rotary compressors, can solve problems such as large sliding losses, achieve low production costs, reduce sliding losses, and improve compressor efficiency

Active Publication Date: 2011-04-06
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the conventional single-cylinder rotary compressor, the two-cylinder rotary compressor has disadvantages in the number of parts and cost, and has the disadvantage of large sliding loss

Method used

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  • Dual-sliding vane rotary compressor, control method and application thereof
  • Dual-sliding vane rotary compressor, control method and application thereof
  • Dual-sliding vane rotary compressor, control method and application thereof

Examples

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Comparison scheme
Effect test

no. 1 example

[0040] see figure 1 , shows the internal structure of the double vane rotary compressor of the present invention and a refrigeration cycle equipped with the compressor. Hereinafter, the double-vane rotary compressor is abbreviated as the rotary compressor 1 .

[0041] The rotary compressor 1 is composed of a compression mechanism unit 21 installed inside the hermetic casing 2, and an electric motor unit 22 arranged on the top thereof. The compression mechanism unit 21 is composed of a cylinder 23, a piston 28, a crankshaft 27, a main bearing 25, a sub bearing 26, a muffler 43, and the like, as in a normal single-cylinder rotary compressor. The cylinder 23 has two slides: the first slide 29a and the second slide 29b, and two discharge holes: the first discharge hole 15a and the second discharge hole 15b.

[0042] A three-way valve 45 for control is arranged outside the rotary compressor 1 in order to stop the operation of the second slide plate 29b or cancel the stop.

[0043]...

no. 2 example

[0079] see Image 6 , the second example shows image 3 In the S mode described in , the first sliding plate 29a is stopped, and the sliding loss generated by the reciprocating motion of the first sliding plate 29a and the sliding loss generated by the contact between the tip of the first sliding plate 29a and the piston 28 are zero. means. In the S mode in the second embodiment, while the second vane cavity 39b is taken as the high-pressure side Pd, the first vane 39a is taken as the low-pressure side Ps.

[0080] In this way, after determining the pressure of the slide cavity, the second slide 29b can be in contact with the piston 28, but the first slide 29a cannot be in contact with the piston 28. As a result, S-mode operation is realized. When switching from the S mode to the P mode, the second vane chamber 39b is regarded as the low pressure side Ps, and the first vane chamber 39a is regarded as the high pressure side Pd. As a result, with the first embodiment's fig...

no. 3 example

[0091] The motor part 21 of the rotary compressor 1 of the first embodiment or the second embodiment is changed to an inverter type motor part, and after the displacement control and the number of revolutions control are combined, the disclosure disclosed in the first embodiment or the second embodiment can be expanded. application of technology. The third embodiment is related to a double vane type inverter type rotary compressor formed by these combinations.

[0092] Figure 9 , shows the relationship between the number of revolutions (the horizontal axis in the figure) and the cooling capacity (the left vertical axis in the figure) of the double-sliding vane frequency conversion rotary compressor, and shows the motor efficiency caused by the number of revolutions (the horizontal axis in the figure right vertical axis). Generally speaking, the motor efficiency of the inverter type rotary compressor is the highest around 60rps, and the efficiency deteriorates sharply after ...

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Abstract

The invention relates to a dual-sliding vane rotary compressor, a control method and an application thereof. The dual-sliding vane rotary compressor comprises a sealed shell of which the internal pressure is the pressure at the high-pressure side, wherein a compressing mechanism part and an electric motor part are arranged in the shell, the compressing mechanism part comprises a cylinder, a suction hole communicated with a cylinder compressing cavity and a piston eccentrically rotating in the cylinder compressing cavity, the cylinder is respectively provided with two sliding vanes and two discharge holes, the compressor is also provided with a pressure switching mechanism which can switch the pressure of a second sliding vane cavity between the pressure at the high-pressure side and the pressure at the low-pressure side, and the pressure switching mechanism can be used for realizing a one-sliding vane operating mode and a first sliding vane and second sliding vane simultaneous operating mode so as to change the displacement of the cylinder, thus finishing the capability control on the displacement of the cylinder by means of one cylinder. The invention has the advantages of small volume, less parts and low cost in the structure aspect and has the advantages of lowering slippage loss and improving compressor efficiency in the capability control mode aspect.

Description

technical field [0001] The present invention relates to a rotary compressor, in particular to a double-vane rotary compressor and its control method and application. Related to rotary compressor technology for controlling refrigeration capacity. Background technique [0002] In recent years, methods of improving air-conditioning capacity control and energy efficiency through variable frequency technology and changing the number of revolutions of motors are becoming popular. However, according to this method, it is difficult to apply technology, there is a problem of reliability due to an increase in the number of electronic parts, and there are also disadvantages in that the cost becomes high. In response to these issues, research on capacity control technology related to twin-cylinder rotary compressors, which are advantageous in terms of ease of application, reliability, and cost, is advancing. However, compared with the conventional single-cylinder rotary compressor, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/356F04C28/00F25B13/00
Inventor 小津政雄李华明
Owner GUANGDONG MEIZHI COMPRESSOR
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