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Compression system, multi-cylinder rotary compressor

A technology of rotary compressor and rotary compression, which is applied in the field of compression system and can solve problems such as conflict, difficult second blade, and time-consuming

Active Publication Date: 2009-01-14
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, when the above-mentioned intermediate pressure is applied as the back pressure of the second vane, there arises a problem that the second vane follows the second roller when switching from the one-cylinder operation to the two-cylinder operation. Takes time, during which the second blade collides with the second roller, producing a clashing sound
[0011] On the other hand, there is also a problem that, during one-cylinder operation, since the same suction-side pressure is applied to the pressure in the second cylinder and the back pressure of the second vane, there is a problem that when changing from two-cylinder operation to one-cylinder operation, When switching, the second vane is difficult to be introduced from the second cylinder 40, during which, it collides with the second roller, and still produces a collision sound
[0012] In addition, although pressure pulses are generated on the back pressure side of the blades (the side opposite to the rollers) by the biasing action of the blades against the rollers during operation of the multi-cylinder rotary compressor, there is still a problem that there is no The pressure pulse of the second blade on which the spring member is installed deteriorates the followability of the second blade and collides with the second roller to generate a collision sound
[0013] In addition, the discharge side pressure of the two rotary compression elements applied as the back pressure of the second vane fluctuates greatly. Even so, the followability of the second vane without the spring member is deteriorated, and there is a gap between the second roller and the second vane. clashing sound
[0014] Also, although the second roller becomes idling in the second rotary compression element during one-cylinder operation, there is still the following problem, that is, because at this time, the pressure in the second cylinder and the second vane The back pressure exerts the same suction side pressure. Due to the balance change between the two spaces, the second vane protrudes into the second cylinder and collides with the second roller, which still produces a conflict sound.

Method used

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Examples

Experimental program
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Embodiment 1

[0081] respectively figure 1 It is a longitudinal sectional side view of an internal high-pressure type rotary compressor 10 having first and second rotary compression elements, showing an embodiment of the multi-cylinder rotary compressor as the compression system CS of the present invention, figure 2 yes means figure 1 A vertical sectional side view of the rotary compressor 10 (shown with figure 1 different profiles). In addition, the compression system CS of the present embodiment is a part of the refrigerant circuit constituting an air conditioner as a refrigeration device for air conditioning a room.

[0082] In each figure, the rotary compressor 10 of the embodiment is an internal high-pressure type rotary compressor, and a motor element 14 and a rotary compression mechanism part 18 are accommodated in a vertical cylindrical hermetic container 12 made of steel plate. The electric element 14 is a driving element disposed on the upper side of the inner space of the air...

Embodiment 2

[0138] Next, another embodiment of the compression system CS of the present invention will be described. Figure 5 It is a longitudinal sectional side view showing an internal high-pressure type rotary compressor 110 having first and second rotary compression elements as a multi-cylinder rotary compressor of the compression system CS in this case. In addition, in Figure 5 in, endowed with Figure 1 to Figure 4 Components with the same symbol are components that can produce the same or similar effects.

[0139] exist Figure 5 In these, 200 is a valve device, and it is provided in the middle part of the refrigerant introduction pipe 94 on the inlet side of the hermetic container 12 on the outlet side of the pressure accumulator 146 . The solenoid valve 200 is a valve device for controlling the flow of refrigerant into the second cylinder 40, and is controlled by the controller 210 as a control device.

[0140] In addition, in this embodiment, as the refrigerant, HFC or HC ...

Embodiment 3

[0178] In each of the above-described embodiments, as the refrigerant, HFC or HC-based refrigerants are used, and carbon dioxide and other refrigerants with a large high-pressure difference may also be used. For example, as the refrigerant, the A refrigerant that combines carbon dioxide and PAG (polyglycol). In this case, since the refrigerant compressed by the rotary compression elements 32 and 34 has a very high pressure, the discharge muffler chamber 62 is made to cover the upper part of the upper support member 54 with the cover member 63 as in the above-mentioned embodiments. If the side shape is different, the cover member 63 may be damaged due to the high pressure.

[0179] Therefore, if the refrigerant compressed by the two rotary compression elements 32 and 34 merges, the shape of the discharge muffler chamber on the upper side of the upper support member 54 is Figure 8 As shown in the shape, the pressure resistance can be ensured. which is, Figure 8 The discharg...

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Abstract

The object of the present invention is to prevent the second blade of a compression system with a muti-cylinder rotary compressor from generating conflicting sound. The compression system comprises a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements (32,34) perform a compression work and a the second operation mode in which the only first rotary compression element (32) substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements (32,34) are applied as a back pressure of the second vane (52), and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device (106) interrupts flowing of a refrigerant into a second cylinder (40), and thereafter suction-side pressures of both the rotary compression elements (32,34) are applied as the back pressure of the second vane (52).

Description

[0001] This application is a divisional application of the application titled "compression system, multi-cylinder rotary compressor and refrigeration device using it" filed by Sanyo Electric Co., Ltd. on June 07, 2005, and the application number is 200510076423.2. technical field [0002] The present invention relates to a compression system, a multi-cylinder rotary compressor constituting it, and a refrigeration device using the same. technical background [0003] Conventionally, such a compression system is constituted by a multi-cylinder rotary compressor, a control device for controlling the operation of the multi-cylinder rotary compressor, and the like. The multi-cylinder rotary compressor, for example, a two-cylinder rotary compressor having first and second rotary compression elements accommodates a drive element and the first and second rotary compression elements driven by the rotary shaft of the drive element in a sealed container. become. The first and second ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/356F04C29/06F04C29/00F04C23/00F25B1/04
CPCF04C23/008F04C18/3564F04C23/001
Inventor 西川刚弘小笠原弘丞須田章博原正之泽边浩幸吉田浩之桥本彰
Owner SANYO ELECTRIC CO LTD