WO2021047107A1 - 压缩机及制冷机组 - Google Patents

压缩机及制冷机组 Download PDF

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Publication number
WO2021047107A1
WO2021047107A1 PCT/CN2019/127968 CN2019127968W WO2021047107A1 WO 2021047107 A1 WO2021047107 A1 WO 2021047107A1 CN 2019127968 W CN2019127968 W CN 2019127968W WO 2021047107 A1 WO2021047107 A1 WO 2021047107A1
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Prior art keywords
air
compressor
air supplement
communication
rotor
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PCT/CN2019/127968
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English (en)
French (fr)
Inventor
刘华
张治平
龙忠铿
李日华
毕雨时
武晓昆
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珠海格力电器股份有限公司
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Publication of WO2021047107A1 publication Critical patent/WO2021047107A1/zh

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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
    • 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
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F04C29/0035—Equalization of pressure pulses
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the present disclosure relates to the technical field of compression devices, in particular to a compressor and a refrigeration unit.
  • the refrigeration unit When the refrigeration unit is operating under some working conditions, a part of the refrigerant will absorb heat through expansion and evaporation to cool another part of the gaseous refrigerant, and then enter the compressor to continue to circulate, and the cooled refrigerant obtains a higher subcooling The temperature of the exhaust gas is reduced and the cooling capacity is increased. At the same time, the application range of the refrigeration unit is broadened.
  • the refrigerant after evaporation and heat exchange passes through the air supply pipeline and the compressor of the refrigeration unit. The air supplement channel enters the rotor cogging during the compression process and joins the next compression exhaust cycle.
  • the present disclosure provides a compressor, including a casing, a compression cavity and a supplementary air cavity are arranged in the casing, a supplementary air passage is arranged in the housing to connect the supplementary air cavity and the air supplement device, and the communication passage is arranged in the supplementary air cavity and the compressor
  • the cavities are connected to each other, and the diameter of the communicating channel is smaller than the diameter of the air supplement channel.
  • the number of the communicating pores is multiple, all communicating pores are connected to the air supplement cavity, and the sum of the circulation area of all the communicating pores is equal to the circulation area of the air supplement pores.
  • the number of communicating pores is multiple, all communicating pores are connected to the air supplement cavity, and the sum of the circulation areas of all the communicating pores is greater than the circulation area of the air supplement pores.
  • a rotor is provided in the compression cavity, and spiral teeth are provided on the circumference of the rotor, and all the communicating holes are arranged in sequence along the spiral direction of the spiral teeth, and during the rotation of the rotor, the spiral teeth sweep all the communicating holes at the same time .
  • the pore diameters of all communicating pores are equal.
  • the helical tooth has a tooth tip, and the width of the tooth tip is smaller than the diameter of the communicating hole.
  • the supplemental air cavity has a first side wall far away from the rotor and a second side wall close to the rotor, the air outlet of the supplemental air channel is arranged on the first side wall, and the air inlet communicating with the channel is arranged on the second side wall. On the side wall.
  • the present disclosure also provides a refrigeration unit including the above-mentioned compressor.
  • FIG. 1 is a schematic structural diagram of a compressor of an embodiment of a compressor and a refrigeration unit provided by the disclosure
  • FIG. 2 is a projection view of the communication channel on the rotor of the embodiment of the compressor and the refrigeration unit provided by the present disclosure
  • the compressor shown in Figures 1 and 2 includes a casing 1, a compression chamber 2 is provided inside the casing 1, and a supplementary air chamber 3 is provided in the casing 1.
  • the refrigerant after evaporation and heat exchange is supplemented by the refrigeration unit
  • the air flow pulsation caused by the gas refilling after the rotor cogging is connected with the air supplement channel in the process maintains the stability of the air supplement process and reduces the vibration and noise caused by the air flow.
  • the housing 1 is provided with a supplementary air passage 4 to connect the supplementary air cavity 3 with the supplementary air pipeline of the supplementary air device, and a communication channel 5 is provided between the supplementary air cavity 3 and the compression chamber 2 to communicate the two, and supplementary air
  • the cross-sectional size of the cavity 3 is significantly larger than the cross-sectional size of the air supplement channel 4 and the communicating channel 5, which improves the prior art of additionally setting a buffer tank on the air supplement pipe to reduce the vibration caused by the air supplement pipe and increase the cost and size of the refrigeration unit
  • the problem is that the structure is simplified and the cost is reduced.
  • the diameter of the communication channel 5 is smaller than the diameter of the air supplement channel 4, reducing the diameter of the communication channel 5, reducing the communication time and the communication area between adjacent tooth grooves, thereby reducing the problem of gas leakage between adjacent tooth grooves.
  • the pressure pulsation can be reduced, the pressure drop can be reduced, and the volumetric efficiency of the compressor during compression can be improved, thereby improving the efficiency of the compressor and the refrigeration unit.
  • the number of the communication channels 5 is multiple, all the communication channels 5 are connected to the air supplement cavity 3, and the sum of the circulation areas of all the communication channels 5 is greater than or equal to the circulation area of the air supplement channels 4, ensuring The air supplement effect of the compressor.
  • a rotor 6 is provided in the compression chamber 2, and spiral teeth 7 are provided on the circumference of the rotor 6, and all the communication channels 5 are arranged in sequence along the spiral direction of the spiral teeth 7, and during the rotation of the rotor 6, the spiral
  • the teeth 7 sweep through all the communicating holes 5 at the same time, so that the compressor can compensate the air cavity 3 and only one groove of the helical tooth 7 during the air supplement process, and when the helical tooth 7 sweeps through the communicating hole 5, It is possible to reduce as much as possible the communication duration and communication area between the grooves of two adjacent spiral teeth 7 through the air supplement cavity 3, thereby reducing air flow pulsation, reducing vibration and noise caused by air supplementing, and reducing the gap between adjacent tooth grooves.
  • the gas leakage improves the volumetric efficiency of the rotor 6 to improve the efficiency of the compressor and the refrigeration unit.
  • the apertures of all the communicating pores 5 are equal to ensure that the air supplement pressure at each of the communicating pores 5 is the same, thereby ensuring the air supplement effect.
  • the helical tooth 7 has a tooth tip, and the width of the tooth tip is smaller than the diameter of the communicating channel 5, which increases the communication time of the communicating channel 5, thereby ensuring the air supplement effect.
  • the distance between two adjacent communication channels 5 is smaller than the diameter of the communication channels 5.
  • the supplemental air cavity 3 has a first side wall 31 away from the rotor 6 and a second side wall 32 close to the rotor 6.
  • the air outlet of the supplemental air duct 4 is provided on the first side wall 31, and the duct 5 is connected to the first side wall 31.
  • the air intake port is arranged on the second side wall 32 to minimize the length of the air supplement channel 4 and the communication channel 5 to increase the air supplement effect.
  • the present disclosure also provides a refrigeration unit including the above-mentioned compressor.
  • a supplementary air cavity is arranged on the compressor shell, which improves the prior art to additionally provide a buffer tank on the supplementary air pipeline to reduce the vibration caused by the supplementary air pipeline and increase the cost and cost of the refrigeration unit.
  • the size problem simplifies the structure and reduces the cost.
  • the diameter of the communication channel is reduced, and the communication time and communication area between adjacent tooth grooves are reduced, thereby reducing the problem of gas leakage between adjacent tooth grooves, thereby reducing pressure
  • the purpose of pulsation and reduction of pressure drop is to improve the volumetric efficiency of the compressor during compression, thereby improving the efficiency of the compressor and the refrigeration unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

压缩机及制冷机组，其中，压缩机包括壳体（1），壳体（1）内设有压缩腔（2）和补气腔（3），壳体（1）内设有补气孔道（4）以将补气腔（3）和补气装置连通，连通孔道（5）设置在补气腔（3）与压缩腔（2）之间以将两者连通，连通孔道（5）的直径小于补气孔道（4）的直径。改善了现有技术中额外在补气管路上设置缓冲罐来降低补气管路带来的振动而增加制冷机组成本和尺寸的问题，简化了结构，降低了成本。

Description

压缩机及制冷机组
相关申请的横向引用
本申请是以CN申请号为201910860825.3，申请日为2019年9月11日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及压缩装置的技术领域，特别是一种压缩机及制冷机组。
背景技术
制冷机组在一些工况下运行中，会让一部分制冷剂通过膨胀蒸发吸热，去冷却另一部分气态制冷剂，随后进入压缩机压缩中段继续循环，而被冷却制冷剂获得了更高的过冷度，排气温度被降低，制冷量提高，同时也拓宽了制冷机组的应用工况范围，目前制冷机组中的运行过程中，蒸发换热后的制冷剂经由制冷机组的补气管路、压缩机补气孔道，进入压缩过程中的转子齿槽，加入到下一个压缩排气循环中，然而由于压缩机齿槽不停地向压缩机排气端推进，单个齿槽内的压力在与补气孔道连通的过程中升高，而相邻两个齿槽先后连通补气孔道时会出现压力骤然降低，且通过补气孔道直径D造成两个齿槽间的短暂连通，同时，在一段时间内，冷却换热后补入压缩机的制冷剂压力自身也存在波动，因此，在补气过程中，整个补气流道中会存在气流脉动，造成补气量波动，转子容积效率降低，以及压缩机和制冷机组整体的振动和噪声的问题。
发明内容
本公开提供一种压缩机，包括壳体，壳体内设有压缩腔和补气腔，壳体内设有补气孔道以将补气腔和补气装置连通，连通孔道设置在补气腔与压缩腔之间以将两者连通，连通孔道的直径小于补气孔道的直径。
在一些实施例中，连通孔道的数量为多个，所有连通孔道均与补气腔连通，且所有连通孔道的流通面积之和与补气孔道的流通面积相等。
在一些实施例中，连通孔道的数量为多个，所有连通孔道均与补气腔连通，且所有连通孔道的流通面积之和大于补气孔道的流通面积。
在一些实施例中，压缩腔内设置有转子，转子的周侧设置有螺旋齿，且所有连通孔道沿螺旋齿的螺旋方向依次排列，且在转子转动过程中，螺旋齿同时扫过所有连通孔道。
在一些实施例中，所有连通孔道的孔径相等。
在一些实施例中，螺旋齿具有齿顶，齿顶的宽度小于连通孔道的直径。
在一些实施例中，相邻两个连通孔道之间具有间距，且间距的尺寸小于连通孔道的直径。
在一些实施例中，补气腔具有远离转子的第一侧壁和靠近转子的第二侧壁，补气孔道的出气口设置于第一侧壁上，连通孔道的进气口设置于第二侧壁上。
本公开还提供一种制冷机组，包括上述的压缩机。
附图说明
图1为本公开提供的压缩机及制冷机组的实施例的压缩机的结构示意图；
图2为本公开提供的压缩机及制冷机组的实施例的连通孔道在转子上的投影视图；
图中：1、壳体；2、压缩腔；3、补气腔、31、第一侧壁；32、第二侧壁；4、补气孔道；5、连通孔道；6、转子；7、螺旋齿。
具体实施方式
为了使本公开的目的、技术方案及优点更加清楚明白，以下结合附图及实施例对本公开进行进一步详细说明。应当理解，此处所描述的具体实施例仅用于解释本公开，并不用于限定本公开。
如图1和图2所示的压缩机，包括壳体1，壳体1内部设有压缩腔2，壳体1内设有补气腔3，蒸发换热后的制冷剂经由制冷机组的补气装置的补气管路进入压缩机后，首先进入补气腔3，由此降低了制冷剂在通过压缩机的连通孔道5之前受到补气管路中的气流脉动的影响，也减小了受到压缩过程中的转子齿槽在与补气孔道连通后气体回灌带来的气流脉动，保持了补气过程的稳定，降低气流造成的振动和噪声。壳体1内设有补气孔道4以将补气腔3与补气装置的补气管路相连通，在补气腔3与压缩腔2之间设置连通孔道5以将两者连通，补气腔3的截面尺寸明显大于补气孔道4和连通孔道5的截面尺寸，改善了现有技术中额外在补气管路上设置缓冲罐来降低补气管路带来的振动而增加制冷机组成本和尺寸的问题，简化了结构，降低了成本。
另外，连通孔道5的直径小于补气孔道4的直径，减小连通孔道5的直径，减小相邻齿槽之间的连通时长和连通面积，从而减少相邻齿槽间气体泄漏的问题，进而实现减轻压力脉动、降低压降，提高压缩机压缩过程中容积效率，从而提高压缩机和制冷机组的效率。
在一些实施例中，连通孔道5的数量为多个，所有连通孔道5均与补气腔3连通，且所有连通孔道5的流通面积之和大于或等于与补气孔道4的流通面积，保证压缩机的补气效果。
在一些实施例中，压缩腔2内设置有转子6，转子6的周侧设置有螺旋齿7，且所有连通 孔道5沿螺旋齿7的螺旋方向依次排列，且在转子6转动过程中，螺旋齿7同时扫过所有连通孔道5，使得压缩机在补气过程中能够补气腔3能够且仅能够对一个螺旋齿7的槽进行补气，并且在螺旋齿7扫过连通孔道5时，能够尽可能减小相邻两个螺旋齿7的槽之间通过补气腔3的连通时长和连通面积，从而减小气流脉动，降低补气造成的振动和噪音，减少相邻齿槽间的气体泄漏，提高转子6容积效率从而提升压缩机和制冷机组效率。
在一些实施例中，所有连通孔道5的孔径相等，保证每个连通孔道5处的补气压力相同，进而保证补气效果。
在一些实施例中，螺旋齿7具有齿顶，齿顶的宽度小于连通孔道5的直径，增加连通孔道5的连通时长，从而保证补气效果。
在一些实施例中，相邻两个连通孔道5之间的间距小于连通孔道5的直径。
在一些实施例中，补气腔3具有远离转子6的第一侧壁31和靠近转子6的第二侧壁32，补气孔道4的出气口设置于第一侧壁31上，连通孔道5的进气口设置于第二侧壁32上，尽可能减小补气孔道4和连通孔道5的长度，增加补气效果。
本公开还提供一种制冷机组，包括上述的压缩机。
本公开提供的压缩机及制冷机组，在压缩机壳体上设置补气腔，改善了现有技术中额外在补气管路上设置缓冲罐以降低补气管路带来的振动且增加制冷机组成本和尺寸的问题，简化了结构，降低了成本，同时降低连通孔道的直径，减小相邻齿槽之间的连通时长和连通面积，从而减少相邻齿槽间气体泄漏的问题，进而实现减轻压力脉动、降低压降的目的，提高压缩机压缩过程中容积效率，从而提高压缩机和制冷机组的效率。
以上实施例仅表达了本公开的多个实施例，其描述较为具体和详细，但并不能因此而理解为对本公开专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干变形和改进，这些都属于本公开的保护范围。因此，本公开专利的保护范围应以所附权利要求为准。

Claims (9)

  1. 一种压缩机，包括壳体(1)，所述壳体(1)内设有压缩腔(2)和补气腔(3)，所述壳体(1)内设有补气孔道(4)以将所述补气腔(3)和补气装置连通，连通孔道(5)设置在所述补气腔(3)与所述压缩腔(2)之间以将两者连通，所述连通孔道(5)的直径小于所述补气孔道(4)的直径。
  2. 根据权利要求1所述的压缩机，其中所述连通孔道(5)的数量为多个，所有所述连通孔道(5)均与所述补气腔(3)连通，且所有所述连通孔道(5)的流通面积之和与所述补气孔道(4)的流通面积相等。
  3. 根据权利要求1所述的压缩机，其中所述连通孔道(5)的数量为多个，所有所述连通孔道(5)均与所述补气腔(3)连通，且所有所述连通孔道(5)的流通面积之和大于所述补气孔道(4)的流通面积。
  4. 根据权利要求2或3所述的压缩机，其中所述压缩腔(2)内设置有转子(6)，所述转子(6)的周侧设置有螺旋齿(7)，且所有所述连通孔道(5)沿所述螺旋齿(7)的螺旋方向依次排列，使得在所述转子(6)转动过程中，所述螺旋齿(7)同时扫过所有所述连通孔道(5)。
  5. 根据权利要求4所述的压缩机，其中所有所述连通孔道(5)的孔径相等。
  6. 根据权利要求4所述的压缩机，其中所述螺旋齿(7)具有齿顶，所述齿顶的宽度小于所述连通孔道(5)的直径。
  7. 根据权利要求4所述的压缩机，其中相邻两个所述连通孔道(5)之间的间距小于所述连通孔道(5)的直径。
  8. 根据权利要求1所述的压缩机，其中所述补气腔(3)具有远离所述转子(6)的第一侧壁(31)和靠近所述转子(6)的第二侧壁(32)，所述补气孔道(4)的出气口设置于所述第一侧壁(31)上，所述连通孔道(5)的进气口设置于所述第二侧壁(32)上。
  9. 一种制冷机组，其中包括权利要求1至8中任一项所述的压缩机。
PCT/CN2019/127968 2019-09-11 2019-12-24 压缩机及制冷机组 WO2021047107A1 (zh)

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