WO2019090940A1 - 压缩机电机冷却结构、压缩机及制冷系统 - Google Patents

压缩机电机冷却结构、压缩机及制冷系统 Download PDF

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Publication number
WO2019090940A1
WO2019090940A1 PCT/CN2017/119457 CN2017119457W WO2019090940A1 WO 2019090940 A1 WO2019090940 A1 WO 2019090940A1 CN 2017119457 W CN2017119457 W CN 2017119457W WO 2019090940 A1 WO2019090940 A1 WO 2019090940A1
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WIPO (PCT)
Prior art keywords
motor
compressor
cooling structure
flow path
refrigerant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/119457
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English (en)
French (fr)
Inventor
刘华
李日华
张天翼
张贺龙
许云功
张宝鸽
毕雨时
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Gree Electric Appliances Inc of Zhuhai
Gree Wuhan Electric Appliances Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Gree Wuhan Electric Appliances Co Ltd
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Application filed by Gree Electric Appliances Inc of Zhuhai, Gree Wuhan Electric Appliances Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Publication of WO2019090940A1 publication Critical patent/WO2019090940A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
    • F04C18/107—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

Definitions

  • the present disclosure relates to a compressor motor cooling structure, a compressor, and a refrigeration system.
  • Screw compressors can be divided into open type and semi-closed type according to the way of connecting the compressor and the motor.
  • the open type screw compressor is connected to the motor through a coupling, and a shaft seal is required on the rotor shaft of the compressor to prevent leakage of refrigerant and lubricating oil;
  • the motor is an open air-cooled motor.
  • the semi-closed screw compressor is built into the compressor.
  • the motor and the compressor are integrated.
  • the compressor housing is flanged to prevent leakage of refrigerant and lubricating oil.
  • the refrigerant is used to cool the motor to ensure reliable cooling of the motor.
  • the motor is a semi-closed motor.
  • the semi-closed screw compressor has the characteristics of good sealing performance, simple structure and few transmission parts, the application range is wider and wider. Since the motor is built into the compressor and cooled by the compressor suction refrigerant, in order to ensure that the motor can be effectively cooled, a motor cooling flow path is arranged outside the motor, and the low temperature suction refrigerant flows in the motor cooling flow path to heat the motor. Exchange, take away the heat of the motor.
  • the motor is installed in the casing of the compressor, and a plurality of ribs in the casing support the stator of the motor, and the outer wall of the motor and the inner wall of the casing form a cooling channel of the stator of the motor, and the inner surface of the stator of the motor and the outer surface of the rotor of the motor are formed.
  • Motor rotor cooling runner because the motor rotor cooling runner is also the design air gap of the motor, the design air gap of the motor is generally small, only 1 ⁇ 2mm. For this reason, the rotor of the motor is not conducive to the refrigerant entering the rotor of the motor during the rotation process. Cooling runners, motor rotor cooling is poor.
  • the present disclosure provides a compressor motor cooling structure, a compressor, and a refrigeration system that facilitate refrigerant entering a cooling flow passage.
  • the present disclosure provides a compressor motor cooling structure including a housing, a motor and a guide, the motor is disposed in the housing, the motor is provided with a flow passage, and the guide is used to guide the refrigerant The flow channel.
  • the flow channel includes a first flow channel, the first flow channel is disposed on a rotor of the motor; the guiding member includes a first guiding member, and the first guiding member is configured to guide the refrigerant to the The first runner.
  • the first guiding member is disposed on the rotor.
  • the flow channel includes a second flow channel, and the second flow channel is disposed at a stator of the motor.
  • the guiding member is disposed obliquely, the first end of the guiding member is away from a central axis of the motor, the second end of the guiding member is adjacent to a central axis of the motor, and the first part of the guiding member The end is inclined relative to the second end toward the direction of rotation of the rotor of the motor.
  • the guiding member has an inclination angle of 10° to 30°.
  • the first end of the guiding member is tangential to the outer edge of the inlet of the flow channel, and the second end of the guiding member extends toward the central axis of the motor.
  • the flow channel includes a plurality of strips, and each of the flow channels is correspondingly disposed with one of the guiding members.
  • the central axis of the flow channel is parallel or has a predetermined angle with the central axis of the motor.
  • the flow channel comprises a plurality of strips, each of the flow channels being disposed around a central axis of the motor.
  • the flow channel includes a through hole or a groove provided in the motor.
  • the present disclosure provides a compressor including the compressor motor cooling structure described above.
  • the compressor is a semi-closed screw compressor.
  • the present disclosure provides a compressor refrigeration system that includes the compressor described above.
  • the refrigerant can be more effectively passed through the inside of the motor, and combined with the flow path provided in the motor, the contact area between the refrigerant and the motor can be increased, and the cooling effect on the motor can be improved.
  • FIG. 1 shows a schematic view of a compressor motor cooling structure of one or more embodiments of the present disclosure
  • FIG. 2 is a schematic structural view of a stator of a motor of one or more embodiments of the present disclosure
  • FIG. 3 is a schematic structural view of a rotor of a motor of one or more embodiments of the present disclosure
  • FIG. 4 shows a schematic view of a guide member provided to a rotor of an electric machine in one or more embodiments of the present disclosure
  • Figure 5 is a front elevational view of Figure 4.
  • a compressor motor cooling structure provided by one or more embodiments of the present disclosure includes a housing 1 , a motor 2 and a guide 4 (as shown in FIGS. 4 and 5 ).
  • the motor 2 is disposed in the housing 1, and the motor 2 is provided with a flow path 3 for guiding the refrigerant to the flow path 3.
  • the housing 1 described above may be the housing of the compressor.
  • the guide member 4 by providing the guide member 4 to guide the refrigerant to the flow path 3, the refrigerant can be more efficiently passed through the inside of the motor, and the flow path 3 provided in the motor 2 can be combined to increase the contact area between the refrigerant and the motor 2. To improve the cooling effect on the motor 2.
  • the flow passage 3 may include a first flow passage 31, and the guide member 4 may include a first guide member provided on the rotor 21 of the motor 2 (shown in FIG. 3), the first guide member capable of The refrigerant is directed to the first flow path 31 (as shown in FIG. 4).
  • the first flow path 31 is disposed inside the rotor 21 along the refrigerant suction end of the compressor to the refrigerant discharge end, and the first flow path 31 penetrates both ends of the rotor 21, and the refrigerant can enter the refrigerant suction end of the compressor.
  • the flow path 31 flows through the first flow path 31 to the refrigerant discharge end of the compressor.
  • the contact area between the rotor 21 and the refrigerant can be increased, the technical problem of uneven cooling of the motor 2 can be solved, and the reliability of the motor 2 can be improved.
  • the first guiding member to guide the refrigerant to the first flow path 31 the technical problem that the refrigerant does not easily enter the first flow path 31 during the rotation of the rotor 21 can be solved, and the flow rate of the refrigerant into the first flow path 31 is improved, thereby improving the rotor 21. Cooling effect.
  • variable-frequency motor rotor is easily demagnetized under high temperature conditions, and the embodiment of the present disclosure can effectively solve the problem that the cooling effect of the fixed-frequency motor under low load is not good, and It can solve the technical problem that the inverter motor rotor is easily demagnetized at high temperature.
  • the first guide member may be disposed on the rotor 21 of the motor 2.
  • the first guide member is provided at the end face of the rotor 21, that is, at the refrigerant suction end of the compressor.
  • the rotor 21 Since the rotor 21 is unfavorable for the refrigerant to enter the first flow path 31 during the rotation, it is convenient to introduce the refrigerant into the first flow path 31 by providing the first guide member, thereby improving the cooling effect of the rotor 21.
  • the first guide member may also be provided to the stator 22 of the motor.
  • the flow channel 3 can also include a second flow channel 32 that can be disposed in the stator 22 of the motor 2 (as shown in FIG. 2).
  • the second flow path 32 is disposed inside the stator 22 along the refrigerant suction end of the compressor to the refrigerant discharge end, the second flow path 32 extends through the two ends of the stator 22, and the refrigerant can be at the refrigerant suction end of the compressor. It enters the second flow path 32 and flows through the second flow path 32 to the refrigerant discharge end of the compressor.
  • the contact area between the stator 22 and the refrigerant can be increased, the technical problem of uneven cooling of the motor 2 can be solved, and the reliability of the motor 2 can be improved.
  • the guide member 4 can also include a second guide member that can direct the refrigerant to the second flow passage 32.
  • the second guide member may be provided to the rotor 21 of the motor 2.
  • the second guide member can be disposed on the stator 22 of the motor 2.
  • the contact area of the stator 22 of the motor 2 with the refrigerant and the rotor 21 and the refrigerant of the motor 2 can be increased.
  • the contact area, especially the flow path, can penetrate the two ends of the stator 22 and the rotor 21 as a whole, increasing the heat exchange area, and the cooling effect of the stator 22 and the rotor 21 of the motor 2 is better.
  • the guiding member 4 can be disposed obliquely, the first end of the guiding member 4 is away from the central axis of the motor 2, and the second end of the guiding member 4 is close to the central axis of the motor 2.
  • the first end of the guide 4 is inclined with respect to the rotational direction of the rotor 21 of the motor 2 with respect to the second end.
  • the guiding member 4 may have an inclination angle of 10 to 30 degrees.
  • the direction of inclination of the guide member 4 coincides with the direction of rotation of the rotor 21 of the motor 2, the purpose of which is to more effectively direct the refrigerant into the first flow path 31 provided in the rotor 21.
  • the above structure is particularly suitable for a variable frequency screw compressor.
  • the motor 2 rotates at a high speed, the heat generated by the motor 2 increases, the rotational speed of the guide member 4 increases, and the flow rate of the guided gas increases;
  • the rotation speed is low, the heat generation of the motor 2 is reduced, the rotation speed of the guide member 4 is reduced, and the flow rate of the guided gas is reduced; therefore, the rotation speed of the motor 2 can be automatically adjusted to finally reach the motor 2 Reliable cooling.
  • the first end of the guide member 4 is tangential to the outer edge of the inlet of the flow path 3, and the second end of the guide member 4 extends toward the central axis of the motor 2.
  • the first end of the guide member 4 is adjacent to the inlet of the flow passage 3, i.e., the root of the front face of the guide member 4 is adjacent to the inlet of the flow passage 3, and can guide the refrigerant to the inlet of the flow passage 3 more quickly.
  • the flow passage 3 of the compressor motor cooling structure may include a plurality of strips, and each of the flow passages 3 may be correspondingly provided with a guide member 4.
  • each flow channel 3 can be arranged around the central axis of the motor 2.
  • each flow channel 3 can be evenly disposed around the central axis of the motor 2, and the arc between the inlets of the adjacent two flow channels 3 is between 10° and 30°, in order to ensure the rotor 21 and the stator of the motor 2.
  • the central axis of the flow passage 3 of the compressor motor cooling structure may be parallel to the central axis of the motor 2, or the central axis of the flow passage 3 may also have a predetermined angle with the central axis of the motor 2.
  • the flow channel 3 in each of the above embodiments may be a through hole provided in the motor 2, and the diameter of the through hole is between ⁇ 4 mm and ⁇ 16 mm, and the size of the through hole can affect the flow rate of the refrigerant flowing through the through hole, directly affecting the motor 2 Cooling effect.
  • the through hole provided in the stator 22 of the motor 2 is located in the middle of the silicon steel sheet of the motor, and the through hole provided in the rotor 21 of the motor 2 is located in the middle of the silicon steel sheet of the motor rotor to ensure that the internal heat of the motor 2 can effectively exchange heat with the via refrigerant.
  • the flow path 3 in each of the above embodiments may also be a groove provided in the motor 2.
  • a passage allowing the passage of the refrigerant may be formed between the stator 22 of the motor 2 and the housing 1, and between the stator 22 of the motor 2 and the rotor 21 of the motor 2. 5.
  • a first passage 51 allowing the passage of the refrigerant is provided between the stator 22 of the motor 2 and the casing 1, and a refrigerant is allowed to pass between the stator 22 of the motor 2 and the rotor 21 of the motor 2.
  • Second channel 52 Second channel 52.
  • An embodiment of the present disclosure also provides a compressor comprising the compressor motor cooling structure of any of the above embodiments.
  • the compressor in the above embodiment may be a semi-closed screw compressor.
  • Embodiments of the present disclosure also provide a refrigeration system including the compressor described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

一种压缩机电机冷却结构和具有该压缩机电机冷却结构的压缩机和制冷系统。压缩机电机冷却结构包括壳体(1)、电机(2)和导向结构(4)，电机(2)设于壳体(1)内，电机(2)设有流道(3)，导向结构(4)用于将冷媒引向流道(3)。该压缩机电机冷却结构通过设置导向结构(4)将冷媒引向流道(3)，能够使冷媒更有效地通过电机(2)内部，结合设置于电机(2)的流道(3)，能够增大冷媒与电机(2)的接触面积，提高对电机的冷却效果。

Description

压缩机电机冷却结构、压缩机及制冷系统
本公开要求申请日为2017年11月13日，申请号为201711111838.8，发明名称为“压缩机电机冷却结构、压缩机及制冷系统”的中国发明专利申请的优先权。
技术领域
本公开涉及一种压缩机电机冷却结构、压缩机及制冷系统。
背景技术
螺杆式压缩机按压缩机与电动机联结方式的不同，可以分为开启式、半封闭式两种。开启式螺杆压缩机是压缩机通过联轴器与电机连接，压缩机转子轴上需要安装轴封，以防冷媒和润滑油泄漏；电机为开启式风冷电机。半封闭式螺杆压缩机是电机内置到压缩机里，电机和压缩机一体，压缩机壳体通过法兰连接，能有效防止冷媒和润滑油的泄漏，并采用冷媒冷却电机，保证电机的可靠冷却；电机为半封闭电机。
由于半封闭螺杆压缩机具有密封性能好，结构简单，传动部件少的特点，应用的范围越来越广。由于电机内置到压缩机里，靠压缩机吸气冷媒进行冷却，为了保证电机能够有效冷却，在电机的外面布置有电机冷却流道，低温吸气冷媒在电机冷却流道里流动，与电机进行热交换，将电机的发热量带走。
具体结构为：电机安装在压缩机的壳体内，壳体内有多条筋对电机定子进行支撑，电机的外壁和壳体的内壁形成电机定子冷却流道，电机定子内表面和电机转子外表面形成电机转子冷却流道，由于电机转子冷却流道也是电机的设计气隙，电机的设计气隙一般很小，只有1～2mm，基于这个原因，电机转子在转动过程中，不利于冷媒进入电机转子冷却流道，电机转子的冷却效果差。
发明内容
本公开提供一种利于冷媒进入冷却流道的压缩机电机冷却结构、压缩机及制冷系统。
本公开提供了一种压缩机电机冷却结构，其包括壳体、电机和导向件，所述电机设于所述壳体内，所述电机设有流道，所述导向件用于将冷媒引向所述流道。
可选地，所述流道包括第一流道，所述第一流道设于所述电机的转子；所述导向 件包括第一导向件，所述第一导向件用于将冷媒引向所述第一流道。
可选地，所述第一导向件设于所述转子。
可选地，所述流道包括第二流道，所述第二流道设于所述电机的定子。
可选地，所述导向件倾斜设置，所述导向件的第一端远离所述电机的中轴线，所述导向件的第二端靠近所述电机的中轴线，所述导向件的第一端相对第二端向所述电机的转子的转动方向倾斜。
可选地，所述导向件的倾斜角度为10°～30°。
可选地，所述导向件的第一端与所述流道的入口外缘相切，所述导向件的第二端向所述电机的中轴线方向延伸。
可选地，所述流道包括多条，每一所述流道对应设置一所述导向件。
可选地，所述流道的中轴线与所述电机的中轴线平行或具有预设夹角。
可选地，所述流道包括多条，各所述流道围绕所述电机的中轴线设置。
可选地，所述流道包括设于所述电机的通孔或凹槽。
本公开提供了一种压缩机，其包括上述的压缩机电机冷却结构。
可选地，所述压缩机为半封闭螺杆压缩机。
本公开提供了一种压缩机制冷系统，其包括上述的压缩机。
基于上述技术方案，本公开至少具有以下有益效果：
本公开通过设置导向件将冷媒引向流道，能够使冷媒更有效地通过电机内部，结合设置于电机的流道，能够增大冷媒与电机的接触面积，提高对电机的冷却效果。
通过以下参照附图对本公开的示例性实施例的详细描述，本公开的其它特征及其优点将会变得清楚。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1示出本公开一个或多个实施例的压缩机电机冷却结构的示意图；
图2示出本公开一个或多个实施例的电机定子的结构示意图；
图3示出本公开一个或多个实施例的电机转子的结构示意图；
图4示出本公开一个或多个实施例的导向件设于电机转子的示意图；
图5为图4的主视示意图。
附图中标号：
1-壳体；
2-电机；21-转子；22-定子；
3-流道；31-第一流道；32-第二流道；
4-导向件；
5-通道；51-第一通道；52-第二通道。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开保护范围的限制。
如图1所示，为本公开一个或多个实施例提供的压缩机电机冷却结构，压缩机电机冷却结构包括壳体1、电机2和导向件4(如图4、图5所示)，电机2设于壳体1内，电机2设有流道3，导向件4用于将冷媒引向流道3。
上述的壳体1可以是压缩机的壳体。
在至少一个实施例中，通过设置导向件4将冷媒引向流道3，能够使冷媒更有效地通过电机内部，结合在电机2设置的流道3，能够增大冷媒与电机2的接触面积，提高对电机2的冷却效果。
在一些实施例中，流道3可以包括第一流道31，导向件4可以包括第一导向件，第一流道31设于电机2的转子21(如图3所示)，第一导向件能够将冷媒引向第一流道31(如图4所示)。
可选地，第一流道31沿压缩机的冷媒吸入端到冷媒排出端方向贯穿设于转子21的内部，第一流道31贯穿转子21的两端，冷媒可以在压缩机的冷媒吸入端进入第一流道31，通过第一流道31流向压缩机的冷媒排出端。
通过在电机2的转子21内部设置允许冷媒通过的第一流道31，能够增加转子21与冷媒的接触面积，解决电机2冷却不均匀的技术问题，提高电机2的可靠性。并且通过设置第一导向件将冷媒引向第一流道31，能够解决转子21转动过程中，冷媒不易进入第一流道31的技术问题，提高冷媒进入第一流道31的流量，进而提高转子21的冷却效果。
并且，由于定频电机在低功率下电机效率差、发热量大，变频电机转子在高温情况下容易消磁，本公开实施例可以有效解决定频电机在低负荷下冷却效果不好的问题，且可以解决变频电机转子在高温下容易消磁的技术难题。
如图4、图5所示，在一些实施例中，第一导向件可以设于电机2的转子21。
可选地，第一导向件设于转子21的端面，即位于压缩机的冷媒吸入端。
由于转子21在转动过程中，不利于冷媒进入第一流道31，通过设置第一导向件能够便于将冷媒引入第一流道31，提高转子21的冷却效果。
可选地，第一导向件也可以设于电机的定子22。
在一些实施例中，流道3也可以包括第二流道32，第二流道32可以设于电机2的定子22(如图2所示)。
可选地，第二流道32沿压缩机的冷媒吸入端到冷媒排出端方向贯穿设于定子22的内部，第二流道32贯穿定子22的两端，冷媒可以在压缩机的冷媒吸入端进入第二流道32，通过第二流道32流向压缩机的冷媒排出端。
通过在电机2的定子22内部设置允许冷媒通过的第二流道32，能够增加定子22与冷媒的接触面积，解决电机2冷却不均匀的技术问题，提高电机2的可靠性。
在一些实施例中，导向件4也可以包括第二导向件，第二导向件能够将冷媒引向第二流道32。
在一些实施例中，第二导向件可以设于电机2的转子21。
在一些实施例中，第二导向件可以设于电机2的定子22。
在一些实施例中，通过在电机2的定子22内部和电机2的转子21内部增加用于冷却的流道3，能够增加电机2的定子22与冷媒的接触面积以及电机2的转子21与冷媒的接触面积，尤其流道可以整体贯穿定子22和转子21的两端，增加了换热面积，使电机2的定子22和转子21的冷却效果更好。
在一些实施例中，如图4、图5所示，导向件4可以倾斜设置，导向件4的第一端远离电机2的中轴线，导向件4的第二端靠近电机2的中轴线，导向件4的第一端相对第二端向电机2的转子21的转动方向倾斜。
可选地，导向件4的倾斜角度可以为10°～30°。
在一些实施例中，导向件4的倾斜方向与电机2的转子21的转动方向一致，这样做的目的是可以更有效的将冷媒引导到转子21内设置的第一流道31内。
上述结构尤其适用于变频螺杆压缩机，当电机2转速高时，电机2的发热量就会增大，导向件4的转速就会增大，引导过来的气体流量就会增大；当电机2转速低时，电机2的发热量就会减小，导向件4的转速就会减小，引导过来的气体流量就会减小；因此，能够根据电机2转速进行自动调节，最终达到电机2的可靠冷却。
根据电机2的转动方向，导向件4的第一端与流道3的入口外缘相切，导向件4的第二端向电机2的中轴线方向延伸。导向件4的第一端靠近流道3的入口，即导向件4的前挡面根部靠近流道3的入口，能够将冷媒更快导向到流道3的入口处。
在一些实施例中，压缩机电机冷却结构的流道3可以包括多条，每一流道3可以对应设置一导向件4。
在流道3包括多条的实施例中，各流道3可以围绕电机2的中轴线设置。
可选地，各流道3可以围绕电机2的中轴线均匀设置，相邻两条流道3的入口之间的弧度在10°～30°之间，目的是保证电机2的转子21和定子22内部有足够多的冷却用流道3。
在一些实施例中，压缩机电机冷却结构的流道3的中轴线与电机2的中轴线可以平行，或者，流道3的中轴线与电机2的中轴线也可以具有预设夹角。
上述各个实施例中的流道3可以为设于电机2的通孔，通孔的直径大小在φ 4mm～φ16mm之间，通孔的大小能够影响流过通孔的冷媒流量，直接影响电机2的冷却效果。
电机2的定子22内部设置的通孔位于电机硅钢片中间，电机2的转子21内部设置的通孔位于电机转子硅钢片中间，以保证电机2的内部热量能够与过孔冷媒有效换热。
上述各个实施例中的流道3也可以为设于电机2的凹槽。
为了提高电机2的冷却效果，在一些实施例中，还可以在电机2的定子22与壳体1之间，以及在电机2的定子22与电机2的转子21之间形成允许冷媒通过的通道5。
具体为，如图1所示，在电机2的定子22与壳体1之间设置允许冷媒通过的第一通道51；在电机2的定子22与电机2的转子21之间形成允许冷媒通过的第二通道52。
本公开实施例还提供了一种压缩机，其包括上述任一实施例中的压缩机电机冷却结构。
上述实施例中的压缩机可以为半封闭螺杆压缩机。
本公开实施例还提供了一种制冷系统，其包括上述的压缩机。
在本公开的描述中，需要理解的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对上述零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本公开保护范围的限制。
最后应当说明的是：以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (14)

  1. 一种压缩机电机冷却结构，其包括：
    壳体(1)；
    电机(2)，其设于所述壳体(1)内，所述电机(2)设有流道(3)；
    导向件(4)，用于将冷媒引向所述流道(3)。
  2. 如权利要求1所述的压缩机电机冷却结构，其中：
    所述流道(3)包括第一流道(31)，所述第一流道(31)设于所述电机(2)的转子(21)；
    所述导向件(4)包括第一导向件，所述第一导向件用于将冷媒引向所述第一流道(31)。
  3. 如权利要求2所述的压缩机电机冷却结构，其中所述第一导向件设于所述转子(21)。
  4. 如权利要求1所述的压缩机电机冷却结构，其中所述流道(3)包括第二流道(32)，所述第二流道(32)设于所述电机(2)的定子(22)。
  5. 如权利要求1所述的压缩机电机冷却结构，其中所述导向件(4)的第一端远离所述电机(2)的中轴线，所述导向件(4)的第二端靠近所述电机(2)的中轴线，所述导向件(4)的第一端相对第二端向所述电机(2)的转子(21)的转动方向倾斜。
  6. 如权利要求5所述的压缩机电机冷却结构，其中所述导向件(4)的倾斜角度为10°～30°。
  7. 如权利要求1所述的压缩机电机冷却结构，其中所述导向件(4)的第一端与所述流道(3)的入口外缘相切，所述导向件(4)的第二端向所述电机(2)的中轴线方向延伸。
  8. 如权利要求1所述的压缩机电机冷却结构，其中所述流道(3)包括多条，每一所述流道(3)对应设置一所述导向件(4)。
  9. 如权利要求1所述的压缩机电机冷却结构，其中所述流道(3)的中轴线与所述电机(2)的中轴线平行或具有预设夹角。
  10. 如权利要求1所述的压缩机电机冷却结构，其中所述流道(3)包括多条，各所述流道(3)围绕所述电机(2)的中轴线设置。
  11. 如权利要求1所述的压缩机电机冷却结构，其中所述流道(3)包括设于所述电机(2)的通孔或凹槽。
  12. 一种压缩机，其包括如权利要求1所述的压缩机电机冷却结构。
  13. 如权利要求12所述的压缩机，其为半封闭螺杆压缩机。
  14. 一种制冷系统，其包括如权利要求12所述的压缩机。
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CN101675249A (zh) * 2007-05-09 2010-03-17 西门子公司 近海海域水下使用的压缩机系统
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