WO2017036230A1 - 压缩机模块及多模块机组、多模块机组均油控制方法 - Google Patents

压缩机模块及多模块机组、多模块机组均油控制方法 Download PDF

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WO2017036230A1
WO2017036230A1 PCT/CN2016/085963 CN2016085963W WO2017036230A1 WO 2017036230 A1 WO2017036230 A1 WO 2017036230A1 CN 2016085963 W CN2016085963 W CN 2016085963W WO 2017036230 A1 WO2017036230 A1 WO 2017036230A1
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oil
pipe
module
compressor
compressors
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PCT/CN2016/085963
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English (en)
French (fr)
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胡强
杨健
卢景斌
沈军
艾芳洋
于艳翠
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珠海格力电器股份有限公司
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Publication of WO2017036230A1 publication Critical patent/WO2017036230A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements

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  • the invention relates to the field of compressor unit control, in particular to a compressor module, a multi-module unit and a multi-module unit oil control method.
  • the compressor is the "heart" of the air conditioner. When the compressor is working, there is a lot of friction inside. In order to ensure the reliable operation of the compressor and improve the performance of the compressor, lubrication is one of the important links, so the lubricant is on the compressor. It is essential that the lubricating oil has lubrication, cooling and sealing effects on the compressor. Moreover, the compressor has a requirement for the amount of lubricating oil, and if the lubricating oil in the compressor is too small, the lubrication is insufficient, and the compressor is damaged. Therefore, a certain amount of oil storage is the most basic condition for ensuring reliable operation of the compressor. Only when the oil storage capacity exceeds the minimum amount of oil required, can the compressor be safely and reliably operated.
  • the existing modular unit oil equalization method mostly adopts three regulations, that is, the module unit needs to be connected in parallel to the parallel gas pipe and the liquid pipe for the oil equalization pipe between the module units, and the module unit has the increase of the oil pipe. Therefore, the installation, commissioning and maintenance of the unit are more cumbersome and costly.
  • the invention aims to provide a compressor module and a multi-module unit and a multi-module unit oil control method capable of ensuring stable oil level.
  • the invention provides a compressor module comprising: at least two compressors, at least two compressors with oil equal holes, and at least two compressors connected in parallel; an oil separator, an inlet of the oil separator and at least two The exhaust port of the compressor is connected, and the oil return port of the oil separator communicates with the suction port of at least two compressors; the first oil equalizing pipe, the first end of the first oil equalizing pipe and at least The oil holes of the two compressors are in communication, and the second end of the first oil equalizing pipe is in communication with the inlet of the oil separator.
  • the compressor module further includes a multi-module oil pipe, the first end of the multi-module oil pipe is in communication with the oil-receiving holes of the at least two compressors, and the second end of the multi-module oil pipe is connected downstream of the outlet of the oil separator .
  • the multi-module equalizing oil pipe comprises a second oil equalizing pipe, the first end of the second oil equalizing pipe is in communication with the oil equalizing holes of the at least two compressors, and the second end of the second oil equalizing oil pipe is connected to the outdoor heat exchanger and the indoor heat exchanger Between the heaters.
  • the multi-module oil pipe comprises a third oil equalizing pipe, the first end of the third oil equalizing pipe is connected with the oil equalizing holes of the at least two compressors, and the second end of the third oil equalizing pipe is connected to the indoor heat exchanger and the four-way Between the valves.
  • the compressor module further includes a gas-liquid separator, the gas outlet of the gas-liquid separator has an oil return hole at the bottom of the gas-liquid separator, and the gas outlet pipe communicates with the suction port of at least two compressors;
  • the separator comprises a fourth oil equalizing pipe, the first end of the fourth oil equalizing pipe is connected to the bottom of the gas-liquid separator, and the position is lower than the oil return hole in the vertical direction, and the second end of the fourth oil equalizing pipe is compressed with at least two The suction port of the machine is connected.
  • the present invention also provides a multi-module assembly comprising the plurality of compressor modules previously described.
  • the invention also provides a multi-module unit oil equalization control method, the method comprising: opening the first oil equalizing pipe when the compressor module of the multi-module unit is in normal operation or single module operation.
  • the method further includes: when the plurality of modules in the multi-module unit are in operation, closing the first equalizing oil pipe and opening the multi-module oil equalizing pipe.
  • the method further includes: opening the fourth oil equalizing tube.
  • the method further includes: when the plurality of modules are in the cooling operation of the multi-module unit, closing the first equalizing oil pipe and the third oil equalizing oil pipe, and opening the second oil equalizing pipe and the fourth oil equalizing pipe.
  • the method further comprises: when the plurality of modules are in the heating operation of the multi-module unit, closing the first equalizing oil pipe and the second oil equalizing pipe, and opening the third oil equalizing pipe and the fourth oil equalizing pipe.
  • the oil-rich compressor is higher than the oil of the compressor oil hole from the compressor oil hole.
  • the first oil equalizing pipe is discharged to the oil separator, and the oil separator returns the oil from the bottom return pipe to the suction side of the compressor, and returns to each compressor, thereby making the oil-rich compression in each compressor.
  • the oil level drops, and the oil level of the oil-deficient compressor rises until the oil level of each compressor reaches equilibrium, which can effectively ensure the oil level in each compressor is stable.
  • Figure 1 is a schematic view of the principle of a compressor module in accordance with the present invention
  • FIG. 2 is a schematic diagram of the principle of a multi-module unit according to the present invention.
  • FIG. 3 is a schematic diagram of a multi-module unit oil equalization control method in accordance with the present invention.
  • a compressor module includes: at least two compressors, at least two compressors having oil equal holes, and at least two compressors connected in parallel with each other; oil separator 4, oil separator 4 The inlet is connected to the exhaust ports of at least two compressors, and the oil return port of the oil separator 4 is in communication with the suction ports of at least two compressors; the first oil equalizing pipe, the first end of the first oil equalizing pipe and at least two The equal oil holes of the compressors are connected, and the second end of the first oil equalizing pipe is in communication with the inlet of the oil separator 4.
  • the invention sets the first oil equalizing pipe so that the oil-rich compressor discharges the oil higher than the oil equalizing hole of the compressor from the oil equalizing hole of the compressor through the first oil equalizing pipe to the oil separator, and the oil separator will oil therein. Returning from the bottom return pipe to the suction side of the compressor, and then returning to each compressor, so that the oil level of the oil-rich compressor drops in each compressor, and the oil level of the oil-free compressor rises until each compressor The oil level is balanced to ensure the stability of the oil level in each compressor.
  • the compressor module further includes a multi-module oil pipe, the first end of the multi-module oil pipe is connected to the oil-receiving holes of the at least two compressors, and the second end of the multi-module oil pipe is connected to the outlet of the oil separator 4 Downstream, so that the oil-rich compressor discharges the oil higher than the oil hole of the compressor from the compressor oil hole through the multi-module oil pipe to the indoor unit, and then redistributes it to each compressor module through circulation, making the oil rich
  • the compressor oil level drops and the oil-free compressor oil level rises until the oil level of all operating compressors reaches equilibrium.
  • the multi-module oil equalizing pipe of the present invention may include a second oil equalizing pipe and a third oil equalizing pipe.
  • the first end of the second oil equalizing pipe is in communication with the oil equalizing holes of the at least two compressors, and the second end of the second oil equalizing pipe is connected between the outdoor heat exchanger and the indoor heat exchanger, preferably an outdoor heat exchanger Small valve 9 between.
  • the first end of the third equalizing oil pipe is in communication with the oil equalizing holes of the at least two compressors, and the second end of the third oil equalizing oil pipe is connected between the indoor heat exchanger and the four-way valve, preferably a four-way valve 11 and a large valve 10. That is, the second oil equalizing pipe or the third oil equalizing pipe is passed, so that the lubricating oil discharged from the oil hole of the compressor directly reaches between the outdoor heat exchanger and the small valve 9, or reaches between the four-way valve 11 and the large valve 10, and then The compressors of each unit are redistributed through the indoor heat exchanger to achieve the balance of the compressor oil level of each unit.
  • the compressor module further includes a gas-liquid separator 3, the gas outlet of the gas-liquid separator 3 has an oil return hole at the bottom of the gas-liquid separator 3, and the suction pipe and the suction of at least two compressors
  • the gas port is connected;
  • the gas-liquid separator 3 includes a fourth oil equalizing pipe, and the first end of the fourth oil pipe is connected to the bottom of the gas-liquid separator 3, and the position is lower than the oil return hole in the vertical direction, and the fourth oil pipe is The second end is connected with the suction ports of at least two compressors, and the fourth oil equalizing pipe is disposed, and during the oil equalization process,
  • the lubricating oil collected in the gas-liquid separator 3 is introduced into the compressor through the fourth oil equalizing pipe to prevent the lubricating oil from accumulating in the gas-liquid separator 3, so that the lubricating oil in each compressor can reach the balance more quickly. .
  • each compressor module includes two parallel compressors, namely a first compressor 1 and a second compressor 2. Of course, more compressors can be provided as needed.
  • the invention also provides a multi-module unit comprising a plurality of the aforementioned compressor modules, wherein the plurality of compressor modules are connected in parallel with each other, that is, the output lines and the input lines of each compressor module are connected to the main lines A and B. Multiple indoor units are connected in parallel or in series on the main line to achieve cooling or heating.
  • the present invention also provides a multi-module unit oil equalization control method, which comprises: opening a first oil equalization pipe when a compressor module of a multi-module unit is in normal operation or a single module operation.
  • the first oil equalizing valve 5, the second oil equalizing valve 6, the third oil equalizing valve 7 and the fourth are turned on.
  • the oil valve 8 is equalized, so that the first oil equalizing pipe is opened, and the other oil pipes are closed.
  • the oil-rich compressor discharges oil from the compressor oil hole from the compressor oil hole through the first oil equalizing valve 5 to the oil separator 4, and the oil separator 4 will take the oil from the bottom.
  • the oil return pipe is returned to the outlet pipe of the gas-liquid separator 3, and then returned to the suction side of the compressor through the gas-liquid separator provided by the compressor, and returned to the compressor, thereby causing the oil level of the oil-rich compressor to drop.
  • the oil-free compressor oil level rises until the oil level of each compressor in the module reaches equilibrium.
  • the first oil equalizing pipe is closed, and the multi-module oil equalizing pipe is opened, so that the oil-rich compressor will be higher than the oil of the compressor oil hole from the compressor oil hole.
  • the oil level of the rich oil compressor is lowered, and the oil level of the oil-deficient compressor rises until all the compressors are operated. The oil level is balanced.
  • the oil-rich compressor discharges the oil higher than the oil hole of the compressor from the compressor oil hole through the second oil equalizing valve 6 and the small valve to the indoor unit through the evaporation process. Returning from the indoor unit to the large valve of the outdoor unit, and returning to the gas-liquid separator 3 through the four-way valve, returning to the oil of the gas-liquid separator, and flowing to the gas-liquid separator through the oil return hole on the other hand.
  • the outlet pipe is directly discharged to the outlet of the gas-liquid separator through the fourth oil equalizing valve 8 through the fourth oil equalizing pipe, and then returned to the compressor through the gas-liquid separator of the compressor.
  • the oil level of the rich oil in all the compressors in the multi-module unit drops, and the oil level of the oil-free compressor rises until the oil level of all the compressors in the multi-module unit is operated. Achieve balance.
  • the first oil equalizing valve 5 and the second oil equalizing valve 6 are closed and opened.
  • the oil-rich compressor discharges the oil higher than the oil hole of the compressor from the compressor oil hole through the third oil equalizing valve 7 and the large valve to the indoor unit through the condensation process.
  • the small valve returned from the indoor unit to the outdoor unit, and then returned to the gas-liquid separator 3 through the four-way valve, and returns to the oil of the gas-liquid separator, and flows to the gas-liquid separator through the oil return hole on the other hand.
  • the outlet pipe is directly discharged to the outlet pipe of the gas-liquid separator through the self-contained oil return pipe via the fourth oil equalizing valve 8, and then returned to the suction side of the compressor through the gas-liquid separator provided by the compressor.
  • the oil level of the rich oil in the compressor of all the multi-module units is reduced, and the oil level of the oil-deficient compressor rises until the oil level of all the compressors of the multi-module unit reaches equilibrium.
  • the compressor module and the multi-module unit and the multi-module unit oil control method when the compressor module of the multi-module unit is in normal operation or single-module operation, the first oil-rich compressor is set by the first oil-saving compressor
  • the oil higher than the oil hole of the compressor is discharged from the compressor oil hole through the first oil equalizing pipe to the oil separator, and the oil separator returns the oil from the bottom return pipe to the suction side of the compressor, and then returns.
  • the oil level of the oil-rich compressor drops in each compressor, and the oil level of the oil-free compressor rises until the oil level of each compressor reaches equilibrium, which can effectively ensure the oil level in each compressor. stable.
  • the second oil equalizing pipe and the third oil equalizing pipe are arranged, so that the oil-rich compressor will be higher than the oil of the compressor oil hole in the cooling mode from the compressor oil hole.
  • the second oil equalizing pipe is discharged to the indoor side through the third oil equalizing pipe in the heating mode, and then returned to the suction side of the compressor from the indoor side, and then returned to each compressor, thereby making each compressor rich.
  • the oil level of the compressor is lowered, and the oil level of the oil-deficient compressor rises until the oil level of each compressor reaches equilibrium, which can effectively ensure the oil level in each compressor is stable.

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Abstract

压缩机模块，包括：至少两个压缩机（1，2），至少两个压缩机（1，2）带均油孔且相互并联；油分离器（4），其进口与至少两个压缩机（1，2）的排气口连通，回油口与至少两个压缩机（1，2）的吸气口连通；第一均油管，其第一端与至少两个压缩机（1，2）的均油孔连通，第二端与油分离器（4）的进口连通。

Description

压缩机模块及多模块机组、多模块机组均油控制方法
相关申请
本发明申请要求2015年09月01日申请的，申请号为201510557235.5，名称为“压缩机模块及多模块机组、多模块机组均油控制方法”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本发明涉及压缩机机组控制领域，具体而言，涉及一种压缩机模块及多模块机组、多模块机组均油控制方法。
背景技术
压缩机是空调器的“心脏”，当压缩机工作时，其内部有大量的摩擦，为保证压缩机可靠运行并提高压缩机的性能，润滑是重要的环节之一，因此润滑油对压缩机是必不可少的，润滑油对压缩机有着润滑、冷却、密封等作用。且压缩机对润滑油有量的要求，压缩机中的润滑油过少则会润滑不足，进而损坏压缩机。因此一定的储油量是保证压缩机可靠运行的最基本条件，只有当储油量超过其需要的最少油量，才能保证压缩机安全可靠运行。
模块化机组在运行过程中因模块机组运行及安装情况差异，可能会出现一模块油多，一模块油少的现象，模块内部并联的压缩机，也可能出现一压缩机油多，一压缩机油少的现象。为此需考虑进行模块均油，使得所有模块机组中运行压缩机不会长时间出现缺油的现象。而现有的模块化机组均油方法大多采用的是三管制，即模块机组需在并联气管和液管之外还需并联用于模块机组间均油的均油管，模块机组均油管的增加，则使得机组的安装、调试、维护就更繁琐了，成本也更高。
发明内容
本发明旨在提供一种能够保证油位稳定的压缩机模块及多模块机组、多模块机组均油控制方法。
本发明提供了一种压缩机模块，包括：至少两个压缩机，至少两个压缩机带均油孔，且至少两个压缩机相互并联；油分离器，油分离器的进口与至少两个压缩机的排气口连通，油分离器的回油口与至少两个压缩机的吸气口连通；第一均油管，第一均油管的第一端与至少 两个压缩机的均油孔连通，第一均油管的第二端与油分离器的进口连通。
进一步地，压缩机模块还包括多模块均油管，多模块均油管的第一端与至少两个压缩机的均油孔连通，多模块均油管的第二端连接在油分离器的出口的下游。
进一步地，多模块均油管包括第二均油管，第二均油管的第一端与至少两个压缩机的均油孔连通，第二均油管的第二端连接在室外换热器和室内换热器之间。
进一步地，多模块均油管包括第三均油管，第三均油管的第一端与至少两个压缩机的均油孔连通，第三均油管的第二端连接在室内换热器与四通阀之间。
进一步地，压缩机模块还包括气液分离器，气液分离器的出气管上具有位于气液分离器底部的回油孔，且出气管与至少两个压缩机的吸气口连通；气液分离器包括第四均油管，第四均油管的第一端连接在气液分离器底部，且位置在竖直方向上低于回油孔，第四均油管的第二端与至少两个压缩机的吸气口连通。
本发明还提供了一种多模块机组，包括前述的多个压缩机模块。
本发明还提供了一种多模块机组均油控制方法，该方法包括：在多模块机组的压缩机模块正常运行或者单模块运行时，打开第一均油管。
进一步地，该方法还包括：在多模块机组中多个模块运行时，关闭第一均油管，并打开多模块均油管。
进一步地，该方法还包括：打开第四均油管。
进一步地，该方法还包括：在多模块机组中多个模块制冷运行时，关闭第一均油管和第三均油管，打开第二均油管和第四均油管。
进一步地，该方法还包括：在多模块机组中多个模块制热运行时，关闭第一均油管和第二均油管，打开第三均油管和第四均油管。
根据本发明的压缩机模块及多模块机组、多模块机组均油控制方法，通过设置第一均油管，使得富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第一均油管排至油分离器，油分离器会将其中的油从底部回油管回至压缩机的吸气侧，进而回到各个压缩机当中，从而使得各个压缩机中，富油的压缩机油位下降，缺油的压缩机油位上升，直至各个压缩机的油位达到平衡，能够有效保证各个压缩机中的油位稳定。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明的压缩机模块的原理示意图；
图2是根据本发明的多模块机组的原理示意图；
图3是根据本发明的多模块机组均油控制方法示意图。
附图标记说明：
1、第一压缩机；2、第二压缩机；3、气液分离器；4、油分离器；5、第一均油阀；6、第二均油阀；7、第三均油阀；8、第四均油阀；9、小阀门；10、大阀门；11、四通阀。
具体实施方式
下面将参考附图并结合实施例来详细说明本发明。
如图1所示，根据本发明的压缩机模块，包括：至少两个压缩机，至少两个压缩机带均油孔，且至少两个压缩机相互并联；油分离器4，油分离器4的进口与至少两个压缩机的排气口连通，油分离器4的回油口与至少两个压缩机的吸气口连通；第一均油管，第一均油管的第一端与至少两个压缩机的均油孔连通，第一均油管的第二端与油分离器4的进口连通。
本发明通过设置第一均油管，使得富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第一均油管排至油分离器，油分离器会将其中的油从底部回油管回至压缩机的吸气侧，进而回到各个压缩机当中，从而使得各个压缩机中，富油的压缩机油位下降，缺油的压缩机油位上升，直至各个压缩机的油位达到平衡，能够有效保证各个压缩机中的油位稳定。
进一步地，压缩机模块还包括多模块均油管，多模块均油管的第一端与至少两个压缩机的均油孔连通，多模块均油管的第二端连接在油分离器4的出口的下游，从而使得富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经多模块均油管排出到室内机，经过循环再重新分配到各个压缩机模块，使得富油的压缩机油位下降，缺油的压缩机油位上升，直至所有运行的压缩机的油位达到平衡。
更优选地，为了使富油压缩机中的油更快的排出压缩机并重新分配到各个机组的压缩机中，本发明中的多模块均油管可以包括第二均油管和第三均油管。第二均油管的第一端与至少两个压缩机的均油孔连通，第二均油管的第二端连接在室外换热器和室内换热器之间，优选地为室外换热器与小阀门9之间。第三均油管的第一端与至少两个压缩机的均油孔连通，第三均油管的第二端连接在室内换热器与四通阀之间，优选为四通阀11和大阀门10。即通过第二均油管或者第三均油管，从而使压缩机均油孔排出的润滑油直接到达室外换热器和小阀门9之间，或者到达四通阀11和大阀门10之间，然后经室内换热器重新分配各机组的压缩机中，实现各机组压缩机油位的平衡。
结合图1所示，压缩机模块还包括气液分离器3，气液分离器3的出气管上具有位于气液分离器3底部的回油孔，且出气管与至少两个压缩机的吸气口连通；气液分离器3包括第四均油管，第四均油管的第一端连接在气液分离器3底部，且位置在竖直方向上低于回油孔，第四均油管的第二端与至少两个压缩机的吸气口连通，设置第四均油管，在均油过程中，可 以将气液分离器3中收集的润滑油通过第四均油管导入到压缩机中，防止润滑油在气液分离器3中积压，从而使得各个压缩机中的润滑油能够更快速的达到平衡。
结合图1所示，为了使均油控制更方便，在第一均油管上设置有第一均油阀5，相应地，第二均油管上设置有第二均油阀6，第三均油管上设置有第三均油阀7，第四均油管上设置有第四均油阀8，通过对应的均油阀控制均油管的打开和关闭，为了防止润滑油在压缩机的均油孔处回流，均油孔处对应连接有单向阀。更具体地，在本发明中，每个压缩机模块包括两台并联的压缩机，即第一压缩机1和第二压缩机2。当然，根据需要，也可以设置更多的压缩机。
本发明还提供了一种多模块机组，包括多个前述的压缩机模块，多个压缩机模块相互并联，即每个压缩机模块的输出管路和输入管路连接在主管路A、B上，多个室内机并联或者串联在主管路上，实现制冷或者制热。
如图1至3所示，本发明还提供了一种多模块机组均油控制方法，该方法包括：在多模块机组的压缩机模块正常运行或者单模块运行时，打开第一均油管。
具体地，结合图1所示，在压缩机模块正常运行或者单模块运行进行均油控制时，开启第一均油阀5、关闭第二均油阀6、第三均油阀7和第四均油阀8，从而实现第一均油管打开，其他均油管关闭。运行过程中，富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第一均油阀5排至油分离器4，油分离器4会将其中的油从底部回油管回至气液分离器3的出管，再通过压缩机自带的气液分离器回至压缩机的吸气侧，回到压缩机当中，从而使得富油的压缩机油位下降，缺油的压缩机油位上升，直至模块内的各个压缩机的油位达到平衡。
进一步地，在多模块机组中多个模块运行时，关闭第一均油管，并打开多模块均油管，从而使得富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经多模块均油管排出到主管道和室内机，经过循环再重新分配到各个压缩机模块，使得富油的压缩机油位下降，缺油的压缩机油位上升，直至所有运行的压缩机的油位达到平衡。
更具体地，在制冷模式运行下，机组进行模块化均油动作时，关闭第一均油阀5和第三均油阀7，开启第二均油阀6和第四均油阀8，多模块机组中所有运行的压缩机中，富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第二均油阀6、小阀门直接排至室内机，经过蒸发过程，由室内机回至室外机的大阀门，再通过四通阀回至气液分离器3中，回到气液分离器的油，一方面通过自身的回油孔流到气液分离器的出管处，一方面通过自带的第四均油管经第四均油阀8直接排至气液分离器的出管处，再通过压缩机自带的气液分离器回至压缩机的吸气侧，回到压缩机当中，从而使得多模块机组中所有运行的压缩机中富油的压缩机油位下降，缺油的压缩机油位上升，直至多模块机组中所有运行压缩机的油位达到平衡。
在制热模式下，机组进行模块化均油动作时，关闭第一均油阀5和第二均油阀6，开启 第三均油阀7和第四均油阀8。多模块机组所有运行的压缩机中，富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第三均油阀7、大阀门直接排至室内机，经过冷凝过程，由室内机回至室外机的小阀门，再通过四通阀回至气液分离器3中，回到气液分离器的油，一方面通过自身的回油孔流到气液分离器的出管处，一方面通过自带的回油管经第四均油阀8直接排至气液分离器的出管处，再通过压缩机自带的气液分离器回至压缩机的吸气侧，回到压缩机当中，从而使得多模块机组所有运行的压缩机中富油的压缩机油位下降，缺油的压缩机油位上升，直至多模块机组所有运行压缩机的油位达到平衡。
从以上的描述中，可以看出，本发明上述的实施例实现了如下技术效果：
根据本发明的压缩机模块及多模块机组、多模块机组均油控制方法，在多模块机组的压缩机模块正常运行或者单模块运行时，通过设置第一均油管，使得富油的压缩机将高出压缩机均油孔的油从压缩机均油孔经第一均油管排至油分离器，油分离器会将其中的油从底部回油管回至压缩机的吸气侧，进而回到各个压缩机当中，从而使得各个压缩机中，富油的压缩机油位下降，缺油的压缩机油位上升，直至各个压缩机的油位达到平衡，能够有效保证各个压缩机中的油位稳定。在多模块机组中多个模块运行时，通过设置第二均油管和第三均油管，使得富油的压缩机将高出压缩机均油孔的油在制冷模式下从压缩机均油孔经第二均油管或者在制热模式下经第三均油管排至室内侧，再由室内侧回至压缩机的吸气侧，进而重新回到各个压缩机当中，从而使得各个压缩机中，富油的压缩机油位下降，缺油的压缩机油位上升，直至各个压缩机的油位达到平衡，能够有效保证各个压缩机中的油位稳定。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种压缩机模块，其特征在于，包括：
    至少两个压缩机，所述至少两个压缩机带均油孔，且所述至少两个压缩机相互并联；
    油分离器(4)，所述油分离器(4)的进口与所述至少两个压缩机的排气口连通，所述油分离器(4)的回油口与所述至少两个压缩机的吸气口连通；
    第一均油管，所述第一均油管的第一端与所述至少两个压缩机的均油孔连通，所述第一均油管的第二端与所述油分离器(4)的进口连通。
  2. 根据权利要求1所述的压缩机模块，其特征在于，
    所述压缩机模块还包括多模块均油管，所述多模块均油管的第一端与所述至少两个压缩机的均油孔连通，所述多模块均油管的第二端连接在所述油分离器(4)的出口的下游。
  3. 根据权利要求2所述的压缩机模块，其特征在于，
    所述多模块均油管包括第二均油管，所述第二均油管的第一端与所述至少两个压缩机的均油孔连通，所述第二均油管的第二端连接在室外换热器和室内换热器之间。
  4. 根据权利要求2所述的压缩机模块，其特征在于，
    所述多模块均油管包括第三均油管，所述第三均油管的第一端与所述至少两个压缩机的均油孔连通，所述第三均油管的第二端连接在室内换热器与四通阀之间。
  5. 根据权利要求1所述的压缩机模块，其特征在于，
    所述压缩机模块还包括气液分离器(3)，所述气液分离器(3)的出气管上具有位于所述气液分离器(3)底部的回油孔，且所述出气管与所述至少两个压缩机的吸气口连通；
    所述气液分离器(3)包括第四均油管，所述第四均油管的第一端连接在所述气液分离器(3)底部，且位置在竖直方向上低于所述回油孔，所述第四均油管的第二端与所述至少两个压缩机的吸气口连通。
  6. 一种多模块机组，包括多个压缩机模块，其特征在于，所述压缩机模块为权利要求1至5中任一项所述的压缩机模块。
  7. 一种如权利要6所述的多模块机组的多模块机组均油控制方法，其特征在于，所述方法包括：在所述多模块机组的压缩机模块正常运行或者单模块运行时，打开第一均油管。
  8. 根据权利要求7所述的多模块机组均油控制方法，其特征在于，所述方法还包括：在所述多模块机组中多个模块运行时，关闭所述第一均油管，并打开多模块均油管。
  9. 根据权利要求8所述的多模块机组均油控制方法，其特征在于，所述方法还包括：打开第四均油管。
  10. 根据权利要求8所述的多模块机组均油控制方法，其特征在于，所述方法还包括：在 所述多模块机组中多个模块制冷运行时，关闭所述第一均油管和第三均油管，打开第二均油管和第四均油管。
  11. 根据权利要求8所述的多模块机组均油控制方法，其特征在于，所述方法还包括：在所述多模块机组中多个模块制热运行时，关闭所述第一均油管和第二均油管，打开第三均油管和第四均油管。
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