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Refrigerating cycle device

A refrigeration cycle and condenser technology, applied in the field of refrigeration cycle devices, can solve the problems of low refrigeration cycle efficiency, complex refrigeration cycle management and control, etc., and achieve the effect of shortening the start-up time and stabilizing the amount of refrigerant in operation

Active Publication Date: 2015-09-23
GUANGDONG MEIZHI COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The management and control of their refrigeration cycle is complicated, and there is also the problem of reduced efficiency of the refrigeration cycle

Method used

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  • Refrigerating cycle device
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  • Refrigerating cycle device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] figure 1 In the illustrated refrigeration cycle, a rotary compressor 10 houses a compression mechanism unit 11 and a motor unit 12 in a casing 14 . Meanwhile, the casing 24 of the rotary compressor 20 accommodates the compression mechanism part 21 and the motor part 22 . In addition, each compressor has an oil storage chamber 13 and an oil storage chamber 23 located at the bottom of the casing, and necessary lubricating oil 13a (hereinafter simply referred to as oil 13a ) is stored therein.

[0059] In general, the oil storage chambers of the rotary compressor range from the height of the center of each compression mechanism unit to the bottom of each casing. However, the oil level during operation often fluctuates up and down. Especially when the compressor is started at a low temperature, a large amount of oil and a large amount of condensed refrigerant will be discharged into the condenser together, so the oil level and oil volume in the oil storage chamber will be...

Embodiment 2

[0103] Figure 4 The illustrated embodiment 2, with respect to the embodiment 1, has added a rotary compressor 30, and there are 3 compressors in total to constitute a refrigeration cycle device. As in the first embodiment, the discharge circuit 25 of the rotary compressor 20 is connected to the connection pipe 34 c of the rotary compressor 30 . The oil injection pipe 28 is connected to the oil discharge pipe 34 d of the rotary compressor 30 and the rotary compressor 10 . All three rotary compressors mentioned above are in operation.

[0104] The high-pressure refrigerant discharged from the rotary compressor 10 is combined with the exhaust refrigerant of the rotary compressor 20 and flows into the rotary compressor 30 . Then, the refrigerant discharged from the rotary compressor 30 is combined and discharged to the condenser 70 from the discharge pipe 34 b. On the other hand, excess oil 13 a in the oil storage chamber 33 returns to the rotary compressor 10 from the oil inj...

Embodiment 3

[0111] Embodiment 3 is a specific application case of embodiment 1 or embodiment 2. Figure 6 The motor unit 12 of the middle and rotary compressors 10 adopts an inverter motor with variable rotation speed, and the rotary compressor 20 adopts a capacity control type compression mechanism unit 21 whose cooling capacity can be varied in two stages.

[0112] In the rotary compressor 10, the cooling capacity is the smallest when the rotational speed of the motor unit 12 is the smallest, and the cooling capacity is the largest when the rotational speed is the highest. Here, the minimum and maximum rotation speeds are 10rps and 120rps, respectively. The cooling capacity obtained at this time is mode A. That is, mode A is variable cooling capacity according to the rotational speed.

[0113]The capacity-controlled compression mechanism part 21 can be implemented using existing technologies, such as the disclosure content of Patent Document 3 (CN201410046931.5). The rotary compressor...

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PUM

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Abstract

The invention discloses a refrigerating cycle device which is at least composed of a condenser, an expansion valve, an evaporator and a plurality of compressors. A sealed shell of each compressor is provided with a rotating type compression mechanism part communicated with a low-pressure loop of the evaporator and a motor part for driving the compression mechanism part. Each compressor is further provided with an oil storage cavity. An exhaust loop of at least one compressor is connected with the sealed shell of another compressor. According to the refrigerating cycle device, stopped compressors play the role of an oil separator part in the operating compressors, the oil discharge amount of the operating compressors in refrigerating cycle can be reduced, the stopped compressors are heated, no liquid refrigerant exists in the stopped compressors, and thus the action refrigerant amount of refrigerating cycle can be stable.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a refrigeration cycle device. Background technique [0002] In a multi-connected air conditioner consisting of several compressors and multiple evaporators in each room, the compressors start and stop repeatedly due to fluctuations in the air-conditioning load. Therefore, the oil retention capacity of each compressor will increase or decrease, and a large amount of refrigerant will condense in the compressor with low temperature during shutdown. Compressors with reduced oil retention are prone to failure. The condensation of refrigerant in the compressor will not only reduce the performance of the refrigeration cycle, but also cause a large amount of oil to be discharged when the compressor is restarted. [0003] In the current multi-connected air-conditioning system, several compressors are connected in parallel in the refrigeration cycle. The oil discharged from these compressors is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B31/00
CPCF25B1/10F25B31/00F25B2400/075F25B2500/06
Inventor 小津政雄向卫民喻继江郭宏张诚梁自强王玲钟亮闫丽丽
Owner GUANGDONG MEIZHI COMPRESSOR
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