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Rotary compressor and refrigeration circulating device

A rotary compressor and circulation device technology, applied in the direction of rotary piston machines, rotary piston pumps, rotary piston/swing piston pump components, etc., can solve the problem of increasing power consumption, increasing the amount of refrigerant sealed, Reduced defrosting time and other issues to achieve the effect of improving reliability

Active Publication Date: 2014-01-15
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these countermeasures will cause the following problems: increase in power consumption, increase in defrosting time will reduce heating comfort, and increase in the amount of oil sealed will require an increase in the amount of refrigerant sealed

Method used

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  • Rotary compressor and refrigeration circulating device
  • Rotary compressor and refrigeration circulating device
  • Rotary compressor and refrigeration circulating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 It shows the structure of the rotary compressor R and the refrigeration cycle device. The compressor R includes: a motor M built in the airtight case 2, a rotary compression member P driven by the motor M, an oil storage chamber 8 provided at the bottom of the airtight case 2, and refrigerating machine oil 6 sealed in the oil storage chamber 8 (Hereinafter, simply referred to as oil or oil 6). H in the figure is the range of the oil storage chamber 8, and L1 is the position of the oil level. figure 1 The temperature of each part of the refrigeration cycle device and compressor is in a stable operation state, so the oil level (as L1) is sufficiently high. Furthermore, approximately 10 to 30% of the refrigerant is dissolved in the oil.

[0032] The side of the airtight casing 2 is equipped with an accumulator A, the compression chamber 22 of the compression part P and the accumulator A are connected through the suction pipe 4 . Therefore, the accumulator A, t...

Embodiment 2

[0055] Figure 9 In the shown embodiment 2, the L-shaped pipe 19 is connected to the inlet hole 16 of the bypass circuit B, and the opening position of the bypass circuit B is changed. As a result, the position of the oil level or the amount of oil after the compressor stops can be chosen arbitrarily. Figure 9 In the above embodiment, by adding the L-shaped pipe 19, the opening position suitable for the height of the sub-bearing 36 can be changed to near the upper surface of the cylinder 20.

[0056] In addition, even if the bypass circuit B is arranged on the flange portion of the main bearing 35, the opening position of the bypass circuit B can be changed to be close to the center of the cylinder 20 by using the L-shaped pipe 19 whose tip is opened on the lower side. In this embodiment, through such a simple operation, the arrangement location of the bypass circuit B and the position of the oil level after the compressor stops can be freely selected.

Embodiment 3

[0058] Figure 12 In the illustrated embodiment 3, the openings at both ends of the bypass circuit B are opened to the oil storage chamber 8 and the container 5 of the accumulator A. In addition, as a differential pressure valve device, the electric valve 60 should be arranged in the middle of the bypass circuit B. Therefore, after the compressor R is stopped, if there is a pressure difference between the airtight casing and the accumulator A, that is, if the electric valve 60 is opened between Δp>0, the oil 6 in the oil storage chamber 8 will be directly moved through the bypass circuit B. into container 5.

[0059] When restarting, regardless of Δp and operating time, if the electric valve 60 is closed, normal compression can be started. The length of the unloading time can be arbitrarily determined. The electric valve 60 is difficult to arrange in the airtight casing 2 like the differential pressure valve device of the first embodiment, but it is very advantageous in ter...

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Abstract

The invention discloses a rotary compressor and a refrigeration circulating device. When the rotary compressor is started and operates in a defrostation mode, spare oil is spitted out, the spitted oil circulates in refrigeration circulation and most of the spitted oil is captured by a fluid reservoir, so the compressor takes several minutes to recover the safe oil mass. According to the rotary compressor provided by the invention, an opening is formed in one side of a by-pass loop fitted with a subsidiary bearing, and the other side of the by-pass loop is provided with a suction port opening; when the compressor stops, the pressure difference between the pressure in the shell and the pressure of the low-pressure side reaches a constant, a differential pressure valve device in the by-pass loop is opened, and oil comes into a container of the fluid reservoir through an inspiration channel from the by-pass loop; once the compressor starts, and the oil of the container can flow back to an oil storage cavity from an oil hole.

Description

technical field [0001] The invention is applied to the oil volume control technology of rotary compressors in air conditioners and refrigeration equipment, etc. On the one hand, it controls the oil level during startup or defrosting operation to reduce the oil discharge volume, and on the other hand, it can promote the oil level to recover as soon as possible. Background technique [0002] In order to reduce the oil discharge amount of the rotary compressor and stabilize the oil level, various technologies have been adopted: controlling the suction of liquid refrigerant through the expansion valve, controlling the rotation speed of the compressor motor, preventing the deposition of refrigerant by heating the motor at low temperature, and increasing the compression Chassis capacity. [0003] Rotary compressors discharge large volumes of oil when they start up or run in defrost. For example, when there is liquid refrigerant deposited in the housing during shutdown, the oil wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/356F04C29/02
Inventor 小津政雄梁自强王玲
Owner GUANGDONG MEIZHI COMPRESSOR
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