CN102566456A - Air cooling screw chiller, oil return control method and device therefor - Google Patents

Air cooling screw chiller, oil return control method and device therefor Download PDF

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Publication number
CN102566456A
CN102566456A CN 201010612486 CN201010612486A CN102566456A CN 102566456 A CN102566456 A CN 102566456A CN 201010612486 CN201010612486 CN 201010612486 CN 201010612486 A CN201010612486 A CN 201010612486A CN 102566456 A CN102566456 A CN 102566456A
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compressor
unit
control
oil
oil return
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CN 201010612486
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Chinese (zh)
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CN102566456B (en )
Inventor
吴海钦
周胡根
夏冬
张龙爱
徐萃端
李绍斌
杨洋
柳飞
赵应生
陈培生
陈锡保
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珠海格力电器股份有限公司
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Abstract

The invention discloses an air cooling screw chiller, an oil return control method and an oil return control device therefor. The oil return control method comprises the following steps: a chiller is started; a motherboard judges whether the chiller operates completely, wherein the motherboard controls the chiller to carry out loading/unloading operations according to loads when the motherboard determines that the chiller operates completely; the motherboard judges whether a low oil level switch of a compressor is switched off when the motherboard determines that the chiller doesn't operate completely; the motherboard controls the chiller to return oil when the motherboard detects that the low oil level switch of the compressor is switched off; and the motherboard controls the chiller to exit an oil return operation when the motherboard detects that a high oil level switch of the compressor is switched on. According to the oil return control method, the oil return control device and the air cooling screw chiller, disclosed by the invention, the service life of the compressor can be prolonged.

Description

风冷螺杆机组的回油控制方法及装置、风冷螺杆机组 Method and apparatus for controlling oil return cooled screw unit, air-cooled screw unit

技术领域 FIELD

[0001] 本发明涉及制冷领域,具体而言,涉及ー种风冷螺杆机组的回油控制方法及装置、 风冷螺杆机組。 [0001] The present invention relates to the field of refrigeration, and in particular, to a cooled screw unit ー seed oil return control method and apparatus, air-cooled screw unit.

背景技术 Background technique

[0002] 在相关技术中,常见的风冷螺杆机组在部分负荷エ况,由于机组的循环冷媒量比较低,特别是在低温制热エ况,导致压缩机排出的冷冻油无法及时回到压缩机内部,导致压缩机缺油,损坏压縮机。 [0002] In the related art, a common air Ester screw unit at part load conditions, due to lower than the refrigerant circulation unit, particularly at a low temperature heating conditions Ester, resulting in the discharge of the compressor refrigeration oil back to the compressor can not be promptly internal machine, cause the compressor in oil, damage to the compressor.

[0003] 针对相关技术中压缩机往往因为缺油而导致已损坏的问题,目前尚未提出有效的解决方案。 [0003] in the related art compressor often because of lack of oil caused by a damaged issue, we have not yet come up with effective solutions.

发明内容 SUMMARY

[0004] 针对相关技术中压缩机往往因为缺油而导致已损坏的问题而提出本发明,为此, 本发明的主要目的在于提供一种风冷螺杆机组的回油控制方法及装置、风冷螺杆机组,以解决上述问题。 [0004] The compressor in the related art due to lack of oil often results in damaged problems and the present invention is, therefore, a primary object of the present invention is to provide an oil-cooled screw unit back to the control method and apparatus, air screw unit, in order to solve the above problems.

[0005] 为了实现上述目的,根据本发明的ー个方面,提供了ー种风冷螺杆机组的回油控制方法。 [0005] To achieve the above object, according ー aspect of the invention there is provided a method of controlling the oil return ー species cooled screw unit. 该回油控制方法包括:机组开启;主板判断所述机组是否100%运行;其中,所述主板在确定所述机组100%运行时,所述主板控制所述机组按照负荷进行加卸载运行;所述主板在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开;所述主板在检测到所述压缩机的低油位开关断开时,则确定机组需要回油;所述主板控制所述机组回油。 The oil return control method comprising: opening the unit; Board determines whether the operation unit 100%; wherein said board is running at 100% of said determining unit, said control board of the unit for loading and unloading operation in accordance with the load; the said motherboard in determining the operating unit is not 100% inch, the compressor determines whether the low oil level switch is turned off; turned off when said main compressor detecting the low level switch, it is determined that the unit needs to return oil; the oil return control board of the unit.

[0006] 为了实现上述目的,根据本发明的另一方面,提供了ー种风冷螺杆机组的回油控制装置。 [0006] To achieve the above object, according to another aspect of the present invention, there is provided an oil return control apparatus ー species cooled screw unit. 该回油控制装置包括:第一判断模块,用于在机组开启后判断所述机组是否100% 运行,其中,在确定所述机组100%运行时,控制所述机组按照负荷进行加卸载运行;第二判断模块,用于在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开;第一控制模块,用于在检测到所述压缩机的低油位开关断开时,控制所述机组回油;以及,第ニ控制模块,用于在检测到所述压缩机的高油位开关闭合吋,则控制所述机组退出回油。 The oil return control apparatus comprises: a first determining module, configured to determine whether the unit after the unit is turned on if the 100% running, wherein when the determining unit operated at 100%, the control unit for the loading and unloading operation in accordance with the load; second judging means for determining that the unit is not 100% operation inch, the compressor determines whether the low oil level switch is turned off; a first control module for the low oil level switch detects that the compressor when disconnected, the control oil return unit; and a second ni control module for detecting that the compressor inch high level switch is closed, the control unit exits the oil return.

[0007] 通过本发明,采用机组开启;主板判断所述机组是否100%运行;其中,所述主板在确定所述机组100%运行时,所述主板控制所述机组按照负荷进行加卸载运行;所述主板在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开;所述主板在检测到所述压缩机的低油位开关断开时,则确定机组需要回油;所述主板控制所述机组回油的方法,解决了相关技术中压缩机往往因为缺油而导致已损坏的问题,进而达到了提高压縮机寿命的效果。 [0007] By the present invention, a unit open; Board determines whether the unit operated at 100%; wherein, in said main unit determining the run time of 100%, the control board of the unit for loading and unloading operation in accordance with the load; the main board is determined that the unit is not 100% operation inch, the compressor determines whether the low oil level switch is turned off; when said main switch is turned off in a low oil level of the compressor is detected, it is determined that the unit requires an oil return; the oil return control board unit of the method, the solution often damaged due to lack of oil leads to problems in the related art compressor, thereby achieving the effect of improving the life of the compressor.

附图说明 BRIEF DESCRIPTION

[0008] 此处所说明的附图用来提供对本发明的进ー步理解,构成本申请的一部分,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。 [0008] The drawings described herein are used to provide further understanding of the intake ー invention, constitute part of this application, exemplary embodiments of the present invention are used to explain the present invention without unduly limiting the present invention. . 在附图中: In the drawings:

[0009] 图1是根据本发明实施例的风冷螺杆机组的回油控制方法流程图; [0009] FIG. 1 is a flowchart of a control method for an oil-cooled screw unit back to an embodiment of the present invention;

[0010] 图2是根据本发明实施例的风冷螺杆机组的示意图; [0010] FIG. 2 is a schematic diagram of the air-cooled screw unit according to an embodiment of the present invention;

[0011] 图3是根据本发明的风冷螺杆机组的回油控制方法的优选实施例的流程图;以及 [0011] FIG. 3 is a flowchart of an embodiment according to the preferred method of air-cooled oil back to the control screw unit of the present invention; and

[0012] 图4是根据本发明实施例的风冷螺杆机组的回油控制装置的示意图。 [0012] FIG. 4 is a schematic view of the oil return control apparatus according to an embodiment of the air-cooled screw unit of the present invention.

具体实施方式 Detailed ways

[0013] 需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互組合。 [0013] Incidentally, in the case of no conflict, embodiments and features of the embodiments of the present application can be combined with each other. 下面将參考附图并结合实施例来详细说明本发明。 Below with reference to accompanying drawings and embodiments of the present invention will be described in detail.

[0014] 图1是根据本发明实施例的风冷螺杆机组的回油控制方法流程图。 [0014] FIG. 1 is a flowchart of an oil-cooled screw unit back to the control method of an embodiment of the present invention.

[0015] 如图1所示,该方法包括如下的步骤: [0015] As shown in FIG 1, the method comprising the steps of:

[0016] 步骤S102,机组开启。 [0016] step S102, the unit is turned on.

[0017] 步骤S104,主板判断所述机组是否100%运行;其中,所述主板在确定所述机组100%运行时,所述主板控制所述机组按照负荷进行加卸载运行。 [0017] step S104, the system board determines whether the unit operated at 100%; wherein, in said main unit determining the run time of 100%, the control board of the unit for loading and unloading operation in accordance with the load.

[0018] 步骤S106,所述主板在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开。 [0018] step S106, the main plate is determined that the operation unit is not 100% inch, the compressor determines whether the low oil level switch is turned off.

[0019] 步骤S108,所述主板在检测到所述压缩机的低油位开关断开时,则控制所述机组回油。 [0019] In step S108, the main board to the compressor upon detection of a low oil level switch is off, the oil return control unit.

[0020] 步骤S110,所述主板在检测到所述压缩机的高油位开关闭合吋,则控制所述机组退出回油。 [0020] step S110, the detection of the main plate of the compressor to the high level switch closes inch, the control unit exits the oil return.

[0021] 优选地,所述主板在控制所述机组回油吋,所述主板控制所述压缩机100%运行, 并且控制电子膨胀阀开到最大歩数。 [0021] Preferably, the oil return main board inch in the control unit, the control board 100% operation of the compressor and the electronic expansion valve to control the maximum number of ho.

[0022] 进ー步地,所述主板控制所述压缩机100%运行,并且控制电子膨胀阀开到最大步数可以包括:所述主板判断所述压缩机的高油位开关是否闭合;所述主板在检测到所述高油位开关没有闭合时,控制所述机组保持100%运行;所述主板在检测到所述高油位开关闭合时,则控制所述机组退出回油,重新进入按负荷进行加卸载运行。 [0022] Step ー feed, the control board 100% operation of the compressor and the electronic expansion valve to control the maximum number of steps may comprise: determining the main board of the compressor high-level switch is closed; the upon detection of said motherboard to the high oil level switch is not closed, the control unit operating at 100% retention; the motherboard to the high oil level detecting switch is closed, the control unit the oil return exit, reenter loading and unloading operation performed by the load.

[0023] 优选地,主板判断压缩机的低油位开关是否断开包括:所述主板连续第一时间检测所述压缩机的低油位开关是否断开,其中,所述主板在连续第一时间内检测到所述压缩机的低油位开关均断开时,确定所述压缩机的低油位开关断开。 [0023] Preferably, the main board of the compressor is determined whether the switch is turned off low oil level comprising: detecting a first time said main continuous low oil level of the compressor switch is turned off, wherein said first continuous motherboard detecting the time compressor low oil level switches are turned off, the determination of the compressor low oil level switch opens.

[0024] 需要说明的是,在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行,并且,虽然在流程图中示出了逻辑顺序,但是在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤。 [0024] It should be noted that the steps illustrated in the flowchart drawings can be executed on a computer system such as a set of executable instructions, and, although in the flowchart shown in a logical order, but in some case, the steps shown or may be performed in a different order than described herein.

[0025] 本发明通过采用新的回油控制方式的风冷螺杆机組,与传统风冷螺杆机组相比, 能够保证机组的压缩机在任何エ况以及任何负荷下都能有足够的冷冻油,保证机组的可靠性,避免由于缺油导致压缩机烧毁。 [0025] The present invention, by using the new air-cooled oil return control screw unit, compared with the conventional air-cooled screw unit, the compressor unit can be guaranteed in any case Ester load and can have any adequate refrigeration oil to ensure the reliability of the unit, to avoid the lack of lubrication of the compressor burned.

[0026] 图2是根据本发明实施例的风冷螺杆机组的示意图。 [0026] FIG. 2 is a schematic diagram of the air-cooled screw unit according to an embodiment of the present invention.

[0027] 如图2所示,该风冷螺杆机组包括:压缩机1,一端连接至四通阀2的第一端,另ー端与气液分离器10相连接,所述四通阀2的第二端连接至翅片3的第一端,第二端连接至所述气液分离器10,第三端连接至壳管换热器9,所述翅片3的第二端经由制热膨胀阀4和单向阀5连接至储液器6的第一端,所述储液器6的第二端经由制冷膨胀阀7和单向阀8 连接至壳管换热器9。 [0027] As shown in FIG. 2, the air-cooled screw unit comprising: a compressor 1, a first end connected to the end of the four-way valve 2, and the other end ー gas-liquid separator 10 is connected to the four-way valve 2 a second terminal connected to a first end of the fin 3, a second end connected to the gas-liquid separator 10, a third terminal connected to a shell and tube heat exchanger 9, the fins 3 is made through the second end a thermal expansion valve 4 and the check valve 5 is connected to the reservoir 6 of the first end, a second end of the reservoir valve 7 and a check valve 8 is connected to the shell and tube heat exchanger 9 through the refrigerant expansion 6.

[0028] 图3是根据本发明的风冷螺杆机组的回油控制方法的优选实施例的流程图。 [0028] FIG. 3 is a flowchart of a preferred embodiment of the method of controlling air-cooled oil return screw unit of the present invention. 如图3所示,该方法包括以下步骤: As shown in FIG. 3, the method comprising the steps of:

[0029] 机组开机后,按负荷进行加卸载运行,主板判断机组是否100%运行,如果机组100%运行,则按负荷进行加卸载运行,如果不是100%运行,则主板判断机组为部分负荷エ况运行或者恶劣エ况运行。 After the [0029] start generator, for loading and unloading by the load operation, the main board determines whether the unit operated at 100%, 100% if the plant operation, for loading and unloading press load operation, if the operation is not 100%, the board unit is determined as part load Ester Ester running conditions or harsh conditions to run.

[0030] 优选地,机组采用带有高低油位开关的压缩机,连续5秒机组主板检测到压缩机内部的低油位开关断开,表明压缩机已经缺润滑油,则此时机组主板让压缩机容调电磁阀关闭,加载电磁阀得电,使压缩机加载到100%,机组主板控制电子膨胀阀开到最大,此时系统的循环量最大,质量流量达到最大,此时在吸气侧冷媒所具有的剪切カ达到最大,能够将换热器中的润滑油全部带回到压缩机,机组运行一定时间,直到检测到压缩机内部的高油位开关闭合,表明压缩机内部油已满,则退出回油控制逻辑,即电子膨胀阀开到回油前的步数,压缩机重新按负荷进行加卸载,机组按正常的水温控制进行加卸载。 [0030] Preferably, the unit uses a compressor with a low oil level switch, five seconds, the compressor unit of the main board detects the low oil level switch is off, indicating that the compressor has shortage of lubricating oil, so that the system board when the crew the compressor capacity control solenoid valve is closed, load solenoid valve is energized, the compressor is loaded to 100%, the unit control board electronic expansion valve opening to a maximum, then the maximum amount of circulation system, the maximum mass flow rate, in this case the suction side refrigerant has reached the maximum shear ka, lubricating oil can be all of the heat exchanger back to the compressor, a certain unit operation period, until the high level switch detects the closing of the compressor, the oil within the compressor showed is full, the control logic is exited back to the oil, i.e., an electronic expansion valve to a number of steps before the oil return compressor according to a load for re-loading and unloading, according to the normal temperature control unit for loading and unloading.

[0031] 机组处于部分负荷エ况运行或者恶劣エ况运行,主板判断压缩机低油位开关是否断开,如果检测到压缩机低油位开关没有断开,则机组保持部分负荷エ况运行或者恶劣エ况运行,如果检测到压缩机低油位开关断开,则主板判断为机组需要回油。 [0031] Ester unit in part load operating conditions or harsh conditions Ester operation, the compressor determines the motherboard low oil level switch is turned off, if the detected compressor low oil level switch is not turned off, the holding unit or part load operating conditions Ester Ester harsh operating conditions, if the detected low oil level switch off the compressor, the board is determined that the unit need to return oil.

[0032] 机组回油吋,主板控制压缩机到100%运行,并且将电子膨胀阀开到最大歩数, 主板判断压缩机高油位开关是否闭合,如果主板检测到高油位开关没有闭合,则机组保持100%,电子膨胀阀开到最大歩数的运行,如果主板检测到高油位开关闭合,则机组退出回油,重新进入按负荷进行加卸载运行。 [0032] The oil return inch unit, the control board 100% operation of the compressor and the electronic expansion valve to the maximum number of ho, motherboard compressor determines whether the high level switch is closed, if the motherboard detects a high level switch is not closed, then 100% holding unit, an electronic expansion valve to run ho maximum number, if the motherboard detects a high level switch is closed, the oil exits the unit back to re-enter the loading and unloading operation performed by the load.

[0033] 图4是根据本发明实施例的风冷螺杆机组的回油控制装置的示意图。 [0033] FIG. 4 is a schematic view of the oil return control apparatus according to an embodiment of the air-cooled screw unit of the present invention. 如图4所示, 该回油控制装置包括第一判断模块402、第二判断模块404、第一控制模块406和第二控制模块408。 As shown, the oil return control means 4 comprises a first determining module 402, a second determining module 404, a first control module 406 and the second control module 408.

[0034] 其中,第一判断模块402用于在机组开启后判断所述机组是否100%运行,其中, 在确定所述机组100%运行时,控制所述机组按照负荷进行加卸载运行; [0034] wherein, in a first determining module 402 for determining the unit after the unit is turned on if the 100% running, wherein when the determining unit operated at 100%, the control unit for the loading and unloading operation in accordance with the load;

[0035] 第二判断模块404用于在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开。 [0035] The second determination module 404 for determining the operating unit is not 100% inch, the compressor determines whether the low oil level switch is turned off.

[0036] 第一控制模块406用于在检测到所述压缩机的低油位开关断开时,控制机组回油。 [0036] The first control module 406 to the compressor upon detection of a low oil level switch is turned off, the oil return control unit.

[0037] 第二控制模块408用于在检测到所述压缩机的低油位开关未断开时,控制所述机组退出回油。 [0037] The second control module 408 to the compressor upon detection of a low oil level switch is not turned off, the control unit exits the oil return.

[0038] 优选地,上述的回油控制装置还包括:第二判断模块,用于判断所述机组是否100%运行,其中,在确定所述机组100%运行时,控制所述机组按照负荷进行加卸载运行, 在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开。 [0038] Preferably, the oil return control apparatus further comprises: a second determining module configured to determine whether the unit operated at 100%, wherein, when the determining unit operated at 100%, the control unit in accordance with the load loading and unloading operation is determined that the unit is not 100% operation inch, the compressor determines whether the low oil level switch is turned off.

[0039] 优选地,所述第一控制模块包括:判断子模块,用于判断所述压缩机的高油位开关是否闭合;第一控制子模块,用于在检测到所述高油位开关没有闭合时,控制所述机组保持100%运行;第二控制子模块,用于在检测到所述高油位开关闭合吋,则控制所述机组退出回油,重新进入按负荷进行加卸载运行。 [0039] Preferably, the first control module comprises: a judging submodule, configured to determine whether the compressor is high level switch is closed; a first control sub-module, configured to detect the high oil level switch when not closed, the control unit holder 100% operation; and a second control sub-module for detecting that the oil level switch is closed inches high, the control unit the oil return exit, reenter the loading and unloading operation performed by the load . [0040] 优选地,所述第二控制模块包括:所述第一判断模块用于连续第一时间检测所述压缩机的低油位开关是否断开,所述第二判断模块用于在连续第一时间内检测到所述压缩机的低油位开关均断开时,确定所述压缩机的低油位开关断开。 [0040] Preferably, the second control module comprising: a first means for determining said first continuous-time detection of the compressor low oil level switch is turned off, the second determining module is configured to continuously upon detection of said compressor low oil level switches are turned off within a first time, determining that the compressor is a low level switch OFF.

[0041] 需要说明的是,本发明实施例所提供的风冷螺杆机组可以包括本发明实施例提供的任意ー种回油控制装置。 [0041] It should be noted that the embodiment of the present invention is provided in Example cooled screw unit may comprise any embodiment of the present invention provided the oil return control apparatus ー species.

[0042] 从以上的描述中,可以看出,本发明很好地解决了风冷螺杆机组在部分负荷エ况以及低温制热エ况压缩机无法及时回油的问题,具有很大的实用性和创新性。 [0042] From the above description, it can be seen that the present invention solves the problem of air-cooled screw unit in part load conditions and low-temperature heat Ester Ester condition compressor oil can not be back in time, with a great utility and innovation. 可以提高压縮机寿命。 You can increase compressor life.

[0043] 显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所組成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,或者将它们分別制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 [0043] Obviously, those skilled in the art should understand that the modules or steps of the present invention described above can be used general-purpose computing device, they can be integrated in a single computing device or distributed across multiple computing devices available on the Internet, optionally, they can be implemented with program codes executable by a computing device, so that, to be performed by a computing device stored in a storage device, or they are made into integrated circuit modules, or they plurality of modules or steps are manufactured into a single integrated circuit module. 这样,本发明不限制于任何特定的硬件和软件结合。 Thus, the present invention is not limited to any particular hardware and software combination.

[0044] 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。 [0044] The above description is only preferred embodiments of the present invention, it is not intended to limit the invention to those skilled in the art, the present invention may have various changes and variations. 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。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (9)

  1. 1. 一种风冷螺杆机组的回油控制方法,其特征在干,包括: 机组开启;主板判断所述机组是否100%运行,其中,所述主板在确定所述机组100%运行时,所述主板控制所述机组按照负荷进行加卸载运行,所述主板在确定所述机组未在100%运行吋,判断压缩机的低油位开关是否断开;所述主板在检测到所述压缩机的低油位开关断开时,则控制所述机组回油;以及所述主板在检测到所述压缩机的高油位开关闭合吋,则控制所述机组退出回油。 1. A method for controlling the return oil cooled screw unit, characterized in that the dry, comprising: a unit on; Board determines whether the operation unit 100%, wherein, in said main unit determining the run time of 100%, the said control board of the unit for loading and unloading operation according to a load, said main unit is not determined that the operation inch 100%, the compressor determines whether the low oil level switch is turned off; detecting the motherboard to the compressor low oil level when the switch is off, the control unit the oil return; and the main board of the compressor detected in the high level switch closes inch, the control unit exits the oil return.
  2. 2.根据权利要求1所述的回油控制方法,其特征在干,所述主板控制所述机组回油包括:所述主板控制所述压缩机100%运行,并且控制电子膨胀阀开到最大歩数。 The oil return control method according to claim 1, characterized in that the dry, the oil return the control board unit comprising: a control board 100% operation of the compressor, and controls the electronic expansion valve to the maximum number ho.
  3. 3.根据权利要求2所述的回油控制方法,其特征在干,所述主板控制所述压缩机100% 运行的步骤包括:所述主板判断所述压缩机的高油位开关是否闭合;所述主板在检测到所述高油位开关没有闭合时,控制所述压缩机保持100%运行;以及所述主板在检测到所述高油位开关闭合时,控制所述机组退出回油,进入按负荷进行加卸载运行。 The oil return control method according to claim 2, characterized in that the dry, the control board 100% operation of the compressor includes the step of: determining the main board of the compressor high-level switch is closed; upon detection of the main board to the high oil level switch is not closed, the control operation of the compressor maintain 100%; and said main switch is closed in the high oil level is detected, the control unit exits the oil return, entry into a loading and unloading operation according to the load.
  4. 4.根据权利要求1所述的回油控制方法,其特征在干, 主板判断压缩机的低油位开关是否断开包括:所述主板连续第一时间检测所述压缩机的低油位开关是否断开, 其中,所述主板在连续第一时间内检测到所述压缩机的低油位开关均断开时,确定所述压缩机的低油位开关断开。 The oil return control method according to claim 1, characterized in that the dry, the motherboard of the compressor is determined whether the switch is turned off low oil level comprising: detecting said main successive first time the compressor low oil level switch is disconnected, wherein the main board detects said compressor in a first continuous time of low oil level switches are turned off, the determination of the compressor low oil level switch opens.
  5. 5. 一种风冷螺杆机组的回油控制装置,其特征在干,包括:第一判断模块,用于在机组开启后判断所述机组是否100%运行,其中,在确定所述机组100%运行时,控制所述机组按照负荷进行加卸载运行;第二判断模块,用于在确定所述机组未在100%运行时判断压缩机的低油位开关是否断开;第一控制模块,用于在检测到所述压缩机的低油位开关断开时,控制所述机组回油;以及第二控制模块,用于在检测到所述压缩机的高油位开关闭合吋,则控制所述机组退出回油。 A return oil cooled screw unit control apparatus, characterized in that the dry, comprising: a first determining module configured to determine whether the unit after the unit is turned on if the 100% running, wherein in the determining unit 100% operation, the control unit for the loading and unloading operation according to the load; a second determining module, for determining when the compressor is determined that the unit is not running at 100% low oil level switch is turned off; a first control module, with to the compressor upon detection of a low oil level switch is turned off, the oil return control unit; and a second control module for detecting the high level switch of the compressor closed inch, the control of the oil back above the unit to exit.
  6. 6.根据权利要求5所述的回油控制装置,其特征在干,所述第一控制模块包括: 判断子模块,用于判断所述压缩机的高油位开关是否闭合;第一控制子模块,用于在检测到所述高油位开关没有闭合时,控制所述机组保持100% 运行;以及第二控制子模块,用于在检测到所述高油位开关闭合吋,则控制所述机组退出回油,重新进入按负荷进行加卸载运行。 6. The oil return control apparatus according to claim 5, characterized in that the dry, the first control module comprises: a judging submodule, configured to determine whether the compressor is high level switch is closed; a first control sub- means for detecting that the oil level is high when the switch is not closed, the control unit holder 100% operation; and a second control sub-module, configured to the high oil level detecting switch is closed in inches, the control said oil return the unit to exit and re-enter the loading and unloading operation performed by the load.
  7. 7.根据权利要求5所述的回油控制装置,其特征在干,所述控制模块包括: 所述第一判断模块用于连续第一时间检测所述压缩机的低油位开关是否断开,所述第一控制模块用于在连续第一时间内检测到所述压缩机的低油位开关均断开时, 确定所述压缩机的低油位开关断开。 The oil return control apparatus according to claim 5, characterized in that the dry, said control module comprising: a first means for determining said first continuous-time detection of the compressor low oil level switch is turned off when the first control module for the low oil level switch in a first continuous-time detection of the compressor are disconnected, determines the low oil level switch off the compressor.
  8. 8. 一种风冷螺杆机組,包括压缩机,电子膨胀阀,其特征在于,还包括权利要求5至7中任一项所述的回油控制装置。 A cooled screw unit, including a compressor, an electronic expansion valve, characterized by further comprising an oil return control apparatus according to any of claims 5-7.
  9. 9.根据权利要求8所述的风冷螺杆机組,其特征在干,所述回油控制装置用于在所述电子膨胀阀开到最大歩数时,控制所述压缩机100%运行。 9. cooled screw unit according to claim 8, characterized in that the dry, the oil return control means for said electronic expansion valve to the maximum number of ho, the control operation of the compressor 100%.
CN 201010612486 2010-12-29 2010-12-29 Air cooling screw chiller, oil return control method and device therefor CN102566456B (en)

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