WO2016026155A1 - Compresseur rotatif - Google Patents

Compresseur rotatif Download PDF

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Publication number
WO2016026155A1
WO2016026155A1 PCT/CN2014/085055 CN2014085055W WO2016026155A1 WO 2016026155 A1 WO2016026155 A1 WO 2016026155A1 CN 2014085055 W CN2014085055 W CN 2014085055W WO 2016026155 A1 WO2016026155 A1 WO 2016026155A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary compressor
oil
housing
refrigerant
sub
Prior art date
Application number
PCT/CN2014/085055
Other languages
English (en)
Chinese (zh)
Inventor
熊指挥
郭宏
黄锡槿
Original Assignee
广东美芝制冷设备有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 广东美芝制冷设备有限公司 filed Critical 广东美芝制冷设备有限公司
Priority to PCT/CN2014/085055 priority Critical patent/WO2016026155A1/fr
Publication of WO2016026155A1 publication Critical patent/WO2016026155A1/fr

Links

Classifications

    • 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
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • the present invention relates to the field of refrigeration equipment, and more particularly to a rotary compressor. Background technique
  • an object of the present invention is to provide a rotary compressor capable of reducing the amount of refrigerant dissolved in the refrigerating machine oil in the oil pool, reducing the amount of refrigerant enclosed in the air conditioning system, and also ensuring the supply amount and supply of the rotary compressor.
  • the quality of the oil improves the performance of the rotary compressor and improves the reliability of the rotary compressor.
  • a rotary compressor includes: a housing having an oil pool therein, the housing including a lower housing assembly; a motor, the motor being disposed in the housing; a compression mechanism, the compression a mechanism is coupled to the motor, the compression mechanism including a cylinder, a main bearing and a sub-bearing assembly, the main bearing and the sub-bearing assembly being respectively disposed at a top and a bottom of the cylinder and defining a compression chamber with the cylinder,
  • the temperature in the oil pool is increased, so that the refrigerant content in the refrigerating machine oil dissolved in the oil pool is reduced, the refrigerant encapsulation amount in the air conditioning system is reduced, and the dissolution viscosity of the refrigerating machine oil is increased, and the increase is increased.
  • the reliability of rotary compressors is increased.
  • the lower housing assembly has a downwardly projecting projection that is vertically opposed to the hub portion.
  • the bottom surface of the lower housing assembly is formed as a flat surface.
  • the refrigerant used in the refrigeration cycle in the rotary compressor is a HC-based flammable refrigerant.
  • FIG. 1 is a partial schematic view of a rotary compressor in accordance with an embodiment of the present invention
  • Figure 2 is another schematic view of the rotary compressor shown in Figure 1;
  • FIG. 3 is a diagram showing the relationship between the refrigerant content dissolved in the oil bath and the P1 and ⁇ 2 in the rotary compressor shown in FIG. 1.
  • FIG. 4 is a diagram showing the relationship between the energy efficiency and the capacity of the system and P1 and ⁇ 2 according to an embodiment of the present invention. ;
  • Figure 5 is a diagram showing the relationship between the oil supply capacity of the crankshaft of the rotary compressor shown in Figure 1 and ⁇ 2;
  • Figure 6 is a graph showing the relationship between the coefficient of performance of the rotary compressor shown in Figure 1 and ⁇ 2;
  • Figure 7 is a graph showing the relationship between the refrigerant content, the system energy efficiency ratio, the oil supply capacity, and the coefficient of performance and the coefficient of performance of the rotary compressor in a rotary compressor according to an embodiment of the present invention.
  • a rotary compressor 100 includes a housing, a motor 2, and a compression mechanism.
  • the housing is vertically arranged, wherein the central axis of the housing is perpendicular to its placement plane, the motor 2 and the compression mechanism are both disposed within the housing, and the motor 2 is coupled to the compression mechanism to drive the compression mechanism into the housing.
  • the refrigerant in the compression chamber of the compression mechanism is compressed, and the bottom of the casing has an oil pool 13, and lubricating oil in the oil pool 13, such as refrigeration oil, can enter various moving parts of the compression mechanism to lubricate the respective moving parts.
  • the housing may include an upper housing, a main housing 11 and a lower housing assembly, and the main housing 11 may be generally formed into a cylindrical shape in which both the top and the bottom are open, and the upper housing and the lower housing assembly respectively Provided at the top and bottom of the main casing 11 together, the three together define an accommodation space for accommodating the above-described motor 2 and the compression mechanism.
  • the specific structure of the housing can also be adapted according to the type of the rotary compressor 100, which is not particularly limited in the present invention.
  • the lower housing assembly of Figures 1 and 2 is the lower housing 12, however, when other components are mounted on the lower housing 12 and the components are located within the housing, that is, the lower housing assembly includes Lower housing 12 and the above components.
  • the compression mechanism includes a cylinder 31, a main bearing 32, and a sub-bearing assembly, the top and the bottom of the cylinder 31 are open, and the main bearing 32 and the sub-bearing assembly are respectively disposed at the top of the cylinder 31.
  • the bottom portion, and the main bearing 32, the sub-bearing assembly and the cylinder 31 define a compression chamber
  • the sub-bearing assembly includes a hub portion 33 1 and a flange portion 332 which are sequentially connected upward in the axial direction, and the hub portion 33 1 and the flange portion 332 are preferably The coaxial arrangement, wherein the lateral dimension of the hub portion 331 is smaller than the lateral dimension of the flange portion 332.
  • the sub-bearing assembly in FIGS. 1 and 2 is the sub-bearing 33, however, when the vent hole is formed on the sub-bearing 33, a muffler may be disposed on the side of the sub-bearing 33 away from the cylinder. (not shown), in other words, the sub-bearing assembly includes a sub-bearing 33 and a muffler.
  • the present application is based on the discovery and recognition of the following facts and problems by the inventors:
  • the inventors have found that the refrigerant (compressed as an oil and gas mixture) compressed in the compression chamber from the main bearing 32 when the rotary compressor 100 is in operation
  • the vent hole is discharged, and at this time, the oil particles generated by the oil surface of the oil pool 13 are disturbed and splashed in the vicinity of the vent hole, and the refrigerant flows into the casing through the gap between the stator and the rotor of the motor 2
  • the refrigerating machine oil deposited by other factors such as the filter of the motor 2 is returned to the oil pool 13 at the bottom of the casing through the gap between the stator and the inner wall of the casing, and the remaining oil particles continue.
  • the compressor Moving upwards together with the gaseous refrigerant through the exhaust port at the top of the housing, for example, entering the air conditioning system, and finally following the refrigerant together into the compression chamber through the suction port 31 of the housing for the next cycle.
  • the refrigerating machine oil near the bottom of the oil pool 13 is pumped upward by the oiling blade in the center oil hole 341 of the crankshaft of the compression mechanism, and the respective moving parts of the compression mechanism are lubricated, and finally passed.
  • the spiral oil groove provided on the main bearing 32 discharges the compression mechanism, and most of the refrigerator thereafter The oil flows downward toward the oil pool 13, and a small portion follows the refrigerant discharged from the compression chamber and flows upward.
  • the refrigerating machine oil returning from the upper portion of the motor 2 is heated by the motor 2, and the temperature is high.
  • the refrigerating machine oil flowing from the main bearing 32 for lubricating the moving parts is absorbed by a large amount of friction heat, and the temperature is also higher. high.
  • These two parts of the higher temperature refrigerating machine oil flow down together to the oil pool 13, and heat transfer downward.
  • the refrigerating machine oil in the lower part of the oil pool 13 exchanges heat with the outside of the casing through the casing, so that its own temperature is low.
  • the density of the refrigerating machine oil has a certain relationship with the temperature: the higher the temperature, the lower the density, so the refrigerating machine oil with higher temperature in the upper part of the oil pool 13 "floats" on the lower temperature of the refrigerating machine oil, when the higher temperature refrigerating machine oil When the temperature drops, this part of the refrigerating machine oil also sinks due to the increase in density.
  • the higher temperature refrigeration oil is always “floating" on the upper layer of the oil pool 13, and the low temperature refrigeration oil is always “deposited” in the lower portion of the oil pool 13.
  • This temperature difference of the refrigerating machine oil in the oil pool 13 is generally about 5 ° C to 10 ° C, or even larger.
  • the amount of refrigerant dissolved in the refrigerating machine oil has a corresponding relationship with the pressure temperature: the higher the temperature, the smaller the solubility of the refrigerant, the viscosity of the refrigerating machine oil increases, and the reliability increases. That is, the lower the temperature, the greater the solubility of the refrigerant, and the lower the solubility viscosity of the refrigerating machine oil, so that the reliability of the rotary compressor 100 is lowered.
  • the refrigerating machine oil in the lower portion of the oil pool 13 is relatively low in temperature, so that the refrigerant discharged from the compression chamber is largely dissolved in the portion of the refrigerating machine oil, thereby reducing the efficiency of the rotary compressor 100, and because of the refrigerating machine oil
  • the reduced solubility viscosity is unfavorable for lubrication between the moving parts of the compression mechanism, the friction loss is severe, the noise is large, and the service life of the rotary compressor 100 is lowered.
  • reducing the amount of refrigerant oil in the oil pool 13 in the rotary compressor 100 can reduce the amount of refrigerant dissolved in the refrigerating machine oil in the rotary compressor 100, thereby reducing the refrigerant in the air conditioning system.
  • the amount of encapsulation, which is a flammable refrigerant with strict requirements for the amount of refrigerant enclosed, is extremely important.
  • crank oil suction portion ie, the lower end of the crankshaft
  • the crank oil suction portion is gathered to relatively high temperature of the refrigerating machine oil, thereby improving the dissolution viscosity of the refrigerating machine oil for lubrication, improving the lubrication state between the moving parts, thereby reducing refrigerant leakage and improving energy efficiency, and
  • the reliability of the rotary compressor 100 can also be improved. This can be achieved by properly controlling the distance of the bottom of the compressor from the lower end of the crankshaft.
  • P1 and P2 respectively satisfy:
  • H2 is the sub-bearing assembly (e.g., the sub-bearing 33 of Figures 1 and 2)
  • the height in the up and down direction H3 is the edge of the lower surface of the flange portion 332 and the lower case group
  • the vertical distance between the bottom wall of the piece e.g, the bottom wall of the lower case 12 in Figures 1 and 2) (i.e., between the edge of the lower surface of the flange portion 332 and the projection of the edge on the bottom wall of the housing)
  • H4 is the height of the cylinder 31 in the up and down direction (i.e., the thickness of the
  • the distance H1 between the lower surface of the hub portion 331 of the sub-bearing 33 and the bottom wall of the housing should be minimized, and the edge of the lower surface of the flange portion 332 of the sub-bearing 33 and the bottom wall of the housing should be minimized.
  • the vertical distance between the two is H3.
  • the lower casing 12 includes a boss portion and a connecting portion, and the boss portion may be formed to protrude downward from the center of the lower casing 12, and the connecting portion is connected to the boss portion.
  • the plane in which the connecting portion is located is higher than the bottom surface of the boss portion, and the boss portion is vertically opposed to the hub portion 331, at which time HI is the vertical between the center of the lower surface of the hub portion 331 and the bottom wall of the boss portion.
  • the distance H3 is the vertical distance between the edge of the lower surface of the flange portion 332 and the upper surface of the connecting portion.
  • the invention is not limited thereto, and the bottom surface of the lower casing 12 may also be formed in a plane.
  • the change in the amount of refrigerant enclosed is similar to the above change.
  • the energy efficiency ratio (EER) is the coefficient of cooling performance of the air conditioner, also known as the energy efficiency ratio, which represents the unit power cooling capacity of the air conditioning system.
  • EER the energy efficiency ratio
  • the system absorbs more heat in the system or consumes less electricity from the compressor.
  • the distance between the lower end of the crankshaft and the bottom wall of the casing is substantially equal to the above-described distance H1
  • This distance will directly affect the oil supply capacity and quality of the crankshaft. For example, if the distance HI is too small, due to the disturbance of the rotation of the oiling blade, the refrigeration oil at the lower end of the center oil hole 341 may have foam, the quality of the oil supply may be affected, and the oil supply amount may have a relatively large influence.
  • the oil supply capacity of the crankshaft is improved first and then stabilized.
  • the oil supply capacity is greater than 2
  • the lubrication can be effectively ensured to ensure the reliability of the rotary compressor 100. Therefore, from the viewpoint of the reliability of the rotary compressor 100, the value of P2 must be larger than a certain value, that is, in the case where the thickness of the cylinder 31 remains unchanged, The vertical distance between the edge of the lower surface of the flange portion 332 of the bearing 33 and the bottom wall of the housing may not be too close.
  • the bottom of the casing such as the lower casing 12
  • the refrigeration oil content of the refrigeration oil in the oil pool 13 in the rotary compressor 100 is changed, thereby reducing the amount of refrigerant dissolved in the refrigeration oil, thereby reducing the system.
  • the amount of refrigerant enclosed By properly designing the lower casing 12, the quality of the oil supply and the refrigerating machine oil can be better improved, the lubrication can be improved, and the energy efficiency and reliability of the rotary compressor 100 can be improved.
  • the sub-bearing 33 may be away from the cylinder 31.
  • One side is provided with a muffler, and H3 is the vertical distance between the muffler and the bottom of the housing.
  • the temperature in the oil pool 13 is increased, so that the refrigerant content in the refrigerating machine oil dissolved in the oil pool is reduced, and the refrigerant encapsulation amount in the air conditioning system is reduced (that is, the same refrigerant encapsulation amount is reduced).
  • the energy efficiency of the system is improved, and the dissolution viscosity of the refrigerating machine oil is increased, and the reliability of the rotary compressor 100 is increased.
  • discharge volume of the compression chamber means that the inner end of the slide of the compression mechanism abuts against the piston in the compression chamber, and the slide is completely housed in the slide groove of the cylinder 31, and is compressed.
  • the direction “inside” refers to the direction toward the center of the cylinder 31.
  • the lower casing 12 when the discharge volume of the compression chamber is large (i.e., greater than 25 cm 3 / rev ), by designing P2 to a smaller range, for example, when the height of the cylinder 31 remains unchanged, the lower casing 12 is When the bottom wall is closer to the flange portion 332, the temperature of the refrigerating machine oil in the oil pool is higher, which can further reduce the amount of refrigerant dissolved in the refrigerating machine oil in the rotary compressor 100, reduce the amount of refrigerant enclosed in the air conditioning system, and ensure rotation.
  • the compressor 100 is supplied with oil and oil quality, so that the performance of the rotary compressor 100 can be further improved, and the reliability of the rotary compressor 100 can be improved.
  • the refrigerant for the refrigeration cycle in the rotary compressor 100 is flammable, and may be, for example, a HC-based flammable refrigerant, but is not limited thereto.
  • HC-type flammable refrigerants are well known to those skilled in the art and will not be described in detail herein.
  • the above object can be well achieved by designing a reasonable size of the bottom of the casing and the size of the rotary compressor 100.
  • reasonable numerical ranges of Hl, H2, H3 and H4 are obtained, so that less refrigerant is dissolved in the refrigerator oil in the casing, and the oil supply capacity of the rotary compressor 100 is ensured and the reliability is improved.
  • the air conditioning system has a small amount of refrigerant enclosed and improved energy efficiency.

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

Abstract

L'invention porte sur un compresseur rotatif (100) comprenant un carter, un moteur (2) et un mécanisme de compression. Le moteur (2) est disposé dans le carter. Le carter comprend un ensemble carter inférieur (12). Le mécanisme de compression est relié au moteur (2), et comprend un cylindre à air (31), un palier principal (32), et un ensemble palier auxiliaire (33). L'ensemble palier auxiliaire (33) comprend une partie moyeu (331) et une partie bride (332). La dimension latérale de la partie moyeu (331) est inférieure à celle de la partie bride (332). P1 et P2 satisfont séparément : 0,1 ≤ P1 ≤ 1,5 et 0,06 ≤ P2 ≤ 1,1, P1 = H1/H2, P2 = H3/H4, H1 désignant une distance verticale à partir du centre de la surface inférieure de la partie moyeu (331) jusqu'à la paroi inférieure de l'ensemble carter inférieur (12), H2 désignant la hauteur de l'ensemble paliers auxiliaires (33) dans la direction verticale, H3 désignant une distance verticale à partir du bord de la surface inférieure de la partie bride (332) jusqu'à la paroi inférieure de l'ensemble carter inférieur, et H4 désignant la hauteur du cylindre à air (31) dans la direction verticale.
PCT/CN2014/085055 2014-08-22 2014-08-22 Compresseur rotatif WO2016026155A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/085055 WO2016026155A1 (fr) 2014-08-22 2014-08-22 Compresseur rotatif

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Application Number Priority Date Filing Date Title
PCT/CN2014/085055 WO2016026155A1 (fr) 2014-08-22 2014-08-22 Compresseur rotatif

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WO2016026155A1 true WO2016026155A1 (fr) 2016-02-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519953A (en) * 1978-07-29 1980-02-13 Toshiba Corp Rotary compressor
JPS57102594A (en) * 1980-12-19 1982-06-25 Hitachi Ltd Rotary compressor
JP2001355586A (ja) * 2000-06-14 2001-12-26 Matsushita Electric Ind Co Ltd 回転式圧縮機
CN103147987A (zh) * 2013-01-29 2013-06-12 珠海格力电器股份有限公司 一种双缸旋转压缩机及其偏心组装方法
CN103511261A (zh) * 2013-03-12 2014-01-15 广东美芝制冷设备有限公司 旋转式压缩机以及冷冻循环装置
CN203500020U (zh) * 2013-07-18 2014-03-26 广东美芝制冷设备有限公司 旋转式压缩机的压缩装置和具有其的旋转式压缩机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519953A (en) * 1978-07-29 1980-02-13 Toshiba Corp Rotary compressor
JPS57102594A (en) * 1980-12-19 1982-06-25 Hitachi Ltd Rotary compressor
JP2001355586A (ja) * 2000-06-14 2001-12-26 Matsushita Electric Ind Co Ltd 回転式圧縮機
CN103147987A (zh) * 2013-01-29 2013-06-12 珠海格力电器股份有限公司 一种双缸旋转压缩机及其偏心组装方法
CN103511261A (zh) * 2013-03-12 2014-01-15 广东美芝制冷设备有限公司 旋转式压缩机以及冷冻循环装置
CN203500020U (zh) * 2013-07-18 2014-03-26 广东美芝制冷设备有限公司 旋转式压缩机的压缩装置和具有其的旋转式压缩机

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