KR20140131744A - Rotary compressor - Google Patents

Rotary compressor Download PDF

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Publication number
KR20140131744A
KR20140131744A KR20130050733A KR20130050733A KR20140131744A KR 20140131744 A KR20140131744 A KR 20140131744A KR 20130050733 A KR20130050733 A KR 20130050733A KR 20130050733 A KR20130050733 A KR 20130050733A KR 20140131744 A KR20140131744 A KR 20140131744A
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KR
South Korea
Prior art keywords
chamber
vane
suction
pipe
valve
Prior art date
Application number
KR20130050733A
Other languages
Korean (ko)
Inventor
양민수
박수돌
이정배
류성열
Original Assignee
삼성전자주식회사
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Priority to KR20130050733A priority Critical patent/KR20140131744A/en
Publication of KR20140131744A publication Critical patent/KR20140131744A/en

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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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • 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
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • 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
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • 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
    • F04C2240/40—Electric motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/902—Hermetically sealed motor pump 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

A rotary compressor according to the present invention comprises: a casing forming the exterior of the rotary compressor; multiple cylinders arranged in the casing, and having inner spaces therein, rolling pistons turning eccentrically in the inner spaces, vanes touching the rolling pistons radially and partitioning the inner spaces into suction chambers and compression chambers, and vane chambers formed to be dented toward the outsides of the inner spaces so that the vanes can retreat; multiple bearing plates forming the inner spaces along with the cylinders by covering the upper and the lower sides of the respective cylinders; and a valve assembly positioned in the casing, arranged in at least one of the bearing plates, and selectively connecting a suction side refrigerant and a discharge side refrigerant to the vane chambers so that the vanes can touch or be separated from the rolling pistons depending on pressure variations in the vane chambers. The valve assembly includes: a valve chamber of which one side is opened to communicate with the inside of the casing; a vane chamber communication pipe arranged on the valve chamber, and communicating with the vane chambers; a suction side connection pipe through which the suction side refrigerant flows into the valve chamber; a discharge side connection pipe through which the discharge side refrigerant flows into the valve chamber; and a shutoff member installed to retreat in the valve chamber, wherein the suction side connection pipe and the discharge side connection pipe selectively communicate with the vane chamber communication pipe by the shutoff member. Through the above configuration of the rotary compressor according to the present invention, the displacement of the rotary compressor can be varied without an extra control.

Description

ROTARY COMPRESSOR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly, to a rotary compressor having a plurality of compression chambers capable of variable capacity.

Generally, a rotary compressor is mainly applied to an air conditioner. In recent years, as the function of an air conditioner has diversified, a rotary compressor is also demanding a product capable of varying its capacity.

As a technique for varying the capacity in a rotary compressor, there is known a so-called inverter method in which an inverter motor is used to control the number of revolutions of a compressor. However, this technique is costly because the inverter motor itself is expensive.

In addition, there is a method of selectively applying a high-pressure or low-pressure refrigerant to the control side using a switching valve outside the compressor. However, when the switching valve is installed outside the compressor, interference and vibration occur in the piping design and structure design, There is a problem that additional control on the valve is required.

According to an aspect of the present invention, there is provided a rotary compressor including a valve assembly for variable capacity in a compressor, the compressor having a capacity variable function.

There is also provided a rotary compressor for performing a capacity variable by sensing a differential pressure due to an operating condition of an air conditioner cycle without any control over the rotary compressor.

According to an aspect of the present invention, there is provided a rotary compressor including: a casing forming an outer tube; A rolling piston reciprocating with eccentricity in the inner space; a vane that radially contacts the rolling piston and divides the inner space into a suction chamber and a compression chamber; A plurality of cylinders provided inside the casing, the vanes having a vane chamber that is recessed toward the outside of the inner space; A plurality of bearing plates for covering upper and lower portions of the plurality of cylinders to form an inner space together; And at least one of the plurality of bearing plates in the casing is provided for selectively connecting the suction side and the discharge side refrigerant to the vane chamber so that the vane contacts or is spaced from the rolling piston in accordance with the pressure change of the vane chamber And a valve assembly, wherein the valve assembly includes: a valve chamber having one side opened and communicating with the inside of the casing; A vane chamber communicating tube provided on the valve chamber and communicating with the vane chamber; A suction side connection pipe through which the suction side refrigerant flows into the valve chamber and a discharge side connection pipe into which the discharge side refrigerant flows; And a blocking member provided to move back and forth in the valve chamber, wherein the suction pipe connecting pipe and the discharge side connecting pipe are communicated with the vane chamber communicating pipe alternatively by the blocking member.

The valve assembly may further include a valve spring that engages with the blocking member on the other side of the valve chamber that is hermetically closed.

The plurality of cylinders includes a suction pipe for sucking refrigerant into the internal space; And a discharge pipe for discharging refrigerant compressed into the casing.

And the suction pipe connection pipe and the discharge side connection pipe are respectively branched from the suction pipe and the inside of the casing.

The blocking member is moved forward and backward on the valve chamber under the influence of the pressure of the suction side refrigerant branched from the suction pipe at one end and the pressure of the refrigerant at the discharge side inside the casing through the opened one side of the valve chamber .

The blocking member includes a suction side connector blocking member that blocks the suction pipe connecting pipe; A discharge side connection pipe shutoff member for shutting off the discharge side connection pipe; And a blocking member connection portion connecting the suction side connection pipe shutoff member and the discharge side connection pipe shutoff member.

The valve assembly may be provided on a side surface of the bearing plate.

According to an aspect of the present invention, there is provided a rotary compressor including: a casing forming an outer tube; A rolling piston reciprocating in an eccentric manner in the internal space; a rolling piston radially contacting the rolling piston, the internal space being connected to the suction chamber and the compression chamber, A plurality of cylinders provided inside the casing, the vanes having a vane chamber that is recessed toward the outside of the inner space so that the vane moves forward and backward; A plurality of bearing plates for covering upper and lower portions of the plurality of cylinders to form an inner space together; And a plurality of bearing plates provided on at least one side of the plurality of bearing plates in the casing for selectively connecting the suction side and the discharge side refrigerant to the vane chamber so that the vane contacts or is spaced from the rolling piston in accordance with a pressure change of the vane chamber Wherein the valve assembly includes a valve chamber having one side opened and a discharge side refrigerant communicating with each other, the other side being closed and branched from the suction pipe to communicate with a suction side refrigerant; A vane chamber communicating tube provided on the valve chamber and communicating with the vane chamber; And a blocking member provided to move back and forth on the valve chamber to selectively open and close the vane chamber communication tube.

The blocking member may include a vane chamber communicating tube opening / closing member for opening and closing the vane chamber communicating tube by being in contact with the suction side refrigerant at one side and contacting the refrigerant at the outlet side, .

The valve assembly may further include a valve spring having one end fixed to one side of the vane chamber communication pipe opening / closing member and the other end closed to the other closed side of the valve chamber.

The cross section perpendicular to the longitudinal direction of the vane chamber communication pipe opening and closing member may be the same as a cross section perpendicular to the longitudinal direction of the valve chamber.

The rotary compressor of the present invention can perform the capacity change without any additional control and perform such a function in the rotary compressor so that the circuit configuration is simplified and the configuration of the variable capacity rotary compressor can be simplified.

1 illustrates a refrigeration cycle in accordance with an embodiment of the present invention.
2 is a cross-section of a rotary compressor and an acu- lulator according to an embodiment of the present invention.
3 is an internal exploded perspective view of a rotary compressor according to one embodiment of the present invention.
Figures 4a and 4b illustrate operation of a rotary compressor according to one embodiment of the present invention.
Figures 5a and 5b are diagrams of operation of a rotary compressor according to another embodiment of the present invention;

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a refrigeration cycle according to an embodiment of the present invention. The refrigeration cycle consists of a compressor 3, a condenser 4, an expansion valve, and an evaporator.

The compressor 3 compresses and discharges the refrigerant gas into a high temperature and high pressure state and flows into the condenser 4. The condenser 4 condenses the compressed refrigerant compressed in the compressor 3 into a liquid phase. The condensation process releases heat to the surroundings.

The expansion valve expands the liquid refrigerant in the high-temperature and high-pressure state condensed in the condenser 4 into the liquid refrigerant in the low-pressure state, and the evaporator evaporates the refrigerant expanded in the expansion valve 5, while using the latent heat of evaporation of the refrigerant, Temperature and low-pressure refrigerant gas to the compressor (3). Through this cycle, the air temperature of the indoor space can be adjusted.

The accumulator 2 is arranged in contact with the compressor 3 in order to prevent the evaporator 6 from flowing into the compressor 3 in a liquid state without being able to reach the low temperature low pressure refrigerant . The low-temperature low-pressure refrigerant discharged from the evaporator 6 is mixed with the liquid phase and the gas, and flows into the accumulator 2 through the suction pipe 97 via the four-way valve. Since the liquid refrigerant in the compressor 3 is difficult to be compressed, only the gaseous refrigerant flows into the compressor 3 in the accumulator 2 so that only the gaseous refrigerant can flow into the compressor 3. That is, the liquid refrigerant remains in the accumulator 2, and the gaseous refrigerant flows into the compressor 3.

FIG. 2 is a sectional view of a rotary compressor and an aculator according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of the rotary compressor according to one embodiment of the present invention. FIGS. And Fig.

The rotary compressor 1 is provided with a casing 10 forming an outer tube, an electric element 20 installed inside the casing 10 at the upper portion of the casing 10, an electric motor 20, And a compression element 30 connected through a compression mechanism 23.

The electric element 20 includes a cylindrical stator 21 fixed to the inner surface of the casing 10 and a rotor 22 rotatably installed inside the stator 21 and having a central portion coupled to the rotating shaft 23 do. The electric element 20 can drive the compression element 30 connected by the rotary shaft 23 by rotating the rotor 22 when power is applied.

The compression element 30 includes a plurality of cylinders 32 and 34 each having an inner space 50 and 52 partitioned by each other and a plurality of cylinders 32 and 34, A plurality of bearing plates 40,42,44 forming a plurality of cylinders 32,34 and a valve assembly 100 enabling selective actuation of the plurality of cylinders 32,34.

The plurality of cylinders 32 and 34 includes internal spaces 50 and 52 formed therein, rolling pistons 60 and 62 eccentrically revolving in the internal spaces 50 and 52, rolling pistons 60 and 62, Vanes 71 and 81 for contacting the inner spaces 50 and 52 in the radial direction and dividing the inner spaces 50 and 52 into the suction chamber 54 and the compression chamber 55; And vane chambers 70 and 80 that are recessed toward the outside of the vane chambers 52 and 52, respectively. A plurality of cylinders (32, 34) may be provided inside the casing (10).

A plurality of cylinders 32 and 34 may be provided, but in the embodiment of the present invention, two cylinders 32 and 34 are provided for convenience of explanation.

The cylinders 32 and 34 include a first cylinder 32 in which a first internal space 50 is formed and a second cylinder 32 in which a second internal space 52 is formed and which is disposed below the first cylinder 32 34).

The bearing plates 40, 42, and 44 are configured to cover the upper and lower portions of the cylinders 32 and 34 together to form the inner spaces 50 and 52. The first and second cylinders 32 and 34 A second bearing plate 42 provided between the first inner space 50 and the second inner space 52 so as to close the upper opening of the first inner space 50 and the lower opening of the second inner space 52, And a first bearing plate 40 and a third bearing plate 44 provided on the upper portion of the cylinder 32 and the lower portion of the second cylinder 34, respectively.

The first cylinder 32 and the second cylinder 34 are provided with suction ports 91 and 92 connected to the suction pipes 90 and 92 so that gas can be introduced into the first and second inner spaces 50 and 52, And 93 and discharge ports 94 and 95 for discharging the compressed gas inside the compression chambers 55 into the casing 10 are formed. Therefore, when the rotary compressor 1 is operated, the inside of the casing 10 is maintained at a high pressure by the compressed gas discharged through the discharge ports 94 and 95, and the compressed gas in the casing 10 is discharged to the upper portion of the casing 10 And is guided to the outside through the discharge pipe 96 provided.

The suctioned gas is guided to the suction ports 91 and 93 of the respective internal spaces 50 and 52 via the suction pipes 90 and 92 after passing through the accumulator 2.

The rotary shaft 23 has a first internal space 50 and a second internal space 52. The first internal space 50 passes through the center of the first internal space 50 and the second internal space 52 and passes through the first internal space 50 and the second internal space 52, 60) and the second rolling piston (62).

The first rolling piston (60) and the second rolling piston (62) are coupled with the rotary shaft (23), and they can be coupled with each other with different eccentric directions. With this arrangement, the compressed medium can be eccentrically rotated on the inner spaces 50 and 52 and compressed.

The vanes 71 and 81 are constituted by a first vane 71 provided in the first cylinder 32 and a second vane 81 provided in the second cylinder 34. The vanes 71 and 81 are connected to the rolling pistons 60 and 62, So that the inner spaces 50 and 52 can be divided into the suction chamber 54 and the compression chamber 55.

The vane chambers 70 and 80 may include a first vane chamber 70 provided in the first cylinder 32 and a second vane chamber 80 provided in the second cylinder 34.

The first vane chamber 70 includes a first vane 71 configured to be in contact with the first rolling piston 60, A first vane guide portion 72 for guiding the first vane 71 so as to move back and forth together with the rotation of the first rolling piston 60 and a second vane guide portion 72 extending from the first vane guide portion 72, And may include an airtight chamber 73 having a width larger than the width of the guide portion 72.

The second vane chamber 80 includes a second vane guide portion 82 formed to be recessed toward the outside from the inner wall surface of the second inner space 52 to guide the second vane 81, And a vane spring receiving portion 83 provided with a vane spring 84 for urging the second vane 81 toward the second rolling piston 62 so as to divide the second internal space 52.

The valve assembly 100 is provided in at least one of the plurality of bearing plates 40,42,44 within the casing 10 and the vanes 71,81 are arranged in the vane chambers 70,80 The suction side and the discharge side refrigerant are selectively connected to the vane chambers 70 and 80 so as to be in contact with or spaced from the rolling pistons 60 and 62. [ The valve assembly 100 may be provided on the side of the bearing plates 40, 42, 44.

The valve assembly 100 may be provided on at least one of the plurality of bearing plates 40, 42, 44. However, in the embodiment of the present invention, the valve assembly 100 is provided on the second bearing plate 42 for convenience of explanation, 1 vane chamber 70, as shown in FIG.

The valve assembly 100 includes a valve chamber 110 opened at one side and communicating with the interior of the casing 10, a vane chamber communicating tube 120 provided in the valve chamber 110 and communicating with the vane chambers 70 and 80, A discharge side connection pipe 124 through which the suction side refrigerant flows into the valve chamber 110 and a discharge side connection pipe 124 through which the discharge side refrigerant flows, a blocking member 140 ).

One side of the valve chamber 110 is opened and the other side thereof is closed so that one side of the valve chamber 110 communicates with the inside of the casing 10 to supply the compressed refrigerant gas discharged through the cylinders 32, A and the other side is hermetically closed so that the refrigerant gas sucked into the first cylinder 32 can be partially introduced through the suction pipe branch passage 112.

The vane chamber communicating tube 120 is provided on the valve chamber 110 so that the valve chamber 110 and the first vane chamber 70 can communicate with each other. Specifically, the valve chamber 110 can communicate with the closed chamber 73 provided at the rear end side with respect to the front end of the first vane 71 contacting the first rolling piston 60.

A suction side connection pipe 122 through which the suction side refrigerant gas flows into both sides and a discharge side connection pipe 122 through which the discharge side refrigerant gas flows are formed in the vane chamber communication hole 121 of the vane chamber communicating tube 120, 124 are provided. The suction side connection pipe 122 and the discharge side connection pipe 124 are opened and closed by the blocking member 140 to be described later so that the first vane 71 is moved forward and backward to move the first cylinder 32 Respectively.

2, the suction side connection pipe 122 is connected to the suction pipe 90 so that the suction side refrigerant gas is introduced and the other side is spaced apart from the vane chamber communication pipe 120 in the valve chamber 110 do. More specifically, the other side of the suction side connection pipe 122 may be provided at a side of the vane chamber communicating tube 120 which is open to the valve chamber 110 than the vane chamber communication hole 121.

2, the compressed refrigerant gas A discharged from the cylinders 32 and 34 is introduced into one side of the discharge side connection pipe 124, and the other side flows into the valve chamber 110, And is spaced apart from the vane chamber communicating tube 120 by a predetermined distance. The other side of the discharge side connection pipe 124 may be located on the other side of the valve chamber 110 that is closer to the vane chamber communication port 121 than the vane chamber communication port 121 of the vane chamber communication pipe 120.

The distance between the suction side connection pipe 122 and the discharge side connection pipe 124 from the vane chamber communicating pipe 120 is formed to be shorter than the length of the blocking member connection portion 146 of the blocking member 140 to be described later, One of the suction side connection pipe 122 and the discharge side connection pipe 124 is closed by the blocking member 140 and the other opened is communicated with the vane chamber communication port 121 to allow the refrigerant gas to flow .

The blocking member 140 is configured to move forward and backward in the valve chamber 110 and a part of the blocking member 140 is formed in the same manner as the end surface of the valve chamber 110 to communicate with the vane chamber communicating tube 120 communicating with the valve chamber 110 The suction side connection pipe 122 and the discharge side connection pipe 124 can be alternately opened and closed.

The blocking member 140 includes a discharge side connection pipe shutoff member 142 for opening and closing the discharge side connection pipe 124, a suction side connection pipe shutoff member 144 for opening and closing the suction side connection pipe 122, 142 and the suction-side connector pipe blocking member 144. The blocking member connecting portion 146 may be formed of a metal plate.

A cross section of the discharge side connection pipe shutoff member 142 and the suction side connection pipe shutoff member 144 is formed in the same manner as the end face of the valve chamber 110 to connect the discharge side connection pipe shutoff member 142 and the suction side connection pipe shutoff member 144 so that the refrigerant gas does not flow in and out.

The suction side refrigerant gas and the discharge side refrigerant gas of the cylinders 32 and 34 are provided at both ends of the blocking member 140 so as to contact the blocking member 140.

In detail, a suction pipe branch flow passage 112 branched from the suction pipe 90, through which the refrigerant introduced into the first internal space 50 of the first cylinder 32 is guided, is provided on the other sealed side of the valve chamber 110 , And influences the discharge-side connector pipe blocking member 142 out of the blocking member 140. The compressed refrigerant gas A discharged from the cylinders 32 and 34 in the casing 10 is supplied to the opened side of the valve chamber 110 through the suction side connection pipe shutoff member 144 ).

The valve spring 150 is disposed in a state of equilibrium of the blocking member 140 in consideration of the high pressure of the compressed discharge side refrigerant gas discharged into the casing 10 rather than the suction side refrigerant gas flowing through the suction pipe branch passage 112 On the other side of the valve chamber 110 to maintain the valve chamber 110 in the closed state. One end of the valve spring 150 may be fixed to the closed other side of the valve chamber 110 and the other end may be fixed to the blocking member 140.

The operation of the rotary compressor according to the above configuration will be described below.

A case where the compression capacity of the compressor becomes higher according to the change of the operating condition of the air conditioner, that is, the case where the discharge pressure rises and the suction pressure falls is explained.

The discharge pressure received by the suction side connection pipe shutoff member 144 disposed at one side of the valve chamber 110 is larger than the sum of the suction pressure received by the discharge side connection pipe shutoff member 142 and the pressure of the valve spring 150 The blocking member 140 moves to the inside of the valve chamber 110, that is, to the other closed side of the valve chamber 110.

In this case, the suction side connecting pipe 122 into which the suction side refrigerant gas flows into the valve chamber 110 is closed by the suction side connecting pipe blocking member 144, and the discharge side refrigerant gas into the valve chamber 110 The connection pipe 124 is opened and communicates with the vane chamber communication port 121 provided between the discharge side connection pipe shutoff member 142 and the suction side connection pipe shutoff member 144.

Through this operation, the discharge side refrigerant gas is introduced into the closed chamber 73 of the first vane chamber 70 through the vane chamber communicating tube 120 and the first vane 71 is pushed toward the first rolling piston 60 The first cylinder 32 is operated.

Next, the case where the compressing ability of the compressor is lowered according to the change of the operating condition of the air conditioner, that is, the case where the discharge pressure falls and the suction pressure rises will be described.

The discharge pressure received by the suction side connection pipe shutoff member 144 disposed on one side of the valve chamber 110 is smaller than the sum of the suction pressure received by the discharge side connection pipe shutoff member 142 and the pressure generated by the valve spring 150 The blocking member 140 moves to the outside of the valve chamber 110, that is, to one side of the valve chamber 110 that is open.

In this case, the discharge side connection pipe 124 through which the discharge side refrigerant gas flows into the valve chamber 110 is closed by the discharge side connection pipe blocking member 142, and the suction side connection The pipe 122 is opened and communicates with the vane chamber communication hole 121 provided between the discharge side connector pipe blocking member 142 and the suction side connector pipe blocking member 144.

Through this operation, the suction side refrigerant gas flows into the sealed chamber 73 of the first vane chamber 70 through the vane chamber communicating tube 120 and the low pressure is supplied to the first vane 71, 71 are pulled toward the sealing chamber 73 of the first vane chamber 70 so as to perform an idle motion in which the first rolling piston 60 does not perform compression even when the first rolling piston 60 rotates.

Therefore, it is not necessary to supply and cut off the additional power supply necessary for whether one or two cylinders 32 and 34 are operated in the rotary compressor 1 having the two internal spaces 50 and 52, The configuration becomes simple.

In the other embodiment of the present invention, the description of the configuration overlapping with the one embodiment and the description of the operation will be omitted.

5A and 5B are diagrams illustrating the operation of a rotary compressor according to another embodiment of the present invention.

The rotary compressor of the present invention comprises a casing 10 forming an outer tube, inner spaces 50 and 52 formed therein, a suction pipe 90 for sucking refrigerant into the inner spaces 50 and 52, 52 and the rolling pistons 60 and 62 radially contact the rolling pistons 60 and 62 and move the internal spaces 50 and 52 into the suction chamber 54 and the compression chamber 55 And vane chambers 70 and 80 that are recessed toward the outside of the inner spaces 50 and 52 so that the vanes 71 and 81 move forward and backward, A plurality of cylinders 32 and 34 provided in the casing 32, a plurality of bearing plates 40, 42 and 44 which cover the upper and lower portions of the cylinders 32 and 34 together to form internal spaces 50 and 52, (70, 80) is provided in at least one of the plurality of bearing plates (40, 42, 44) within the rolling chamber (10), and the vanes (71, 81) The vane Member to the suction side and discharge-side refrigerant to the (70,80) can include a valve assembly 200 for selectively connecting.

The valve assembly 200 according to another embodiment of the present invention includes a valve chamber 210 in which one side is opened and a discharge side refrigerant communicates with the casing 10 and the other side is closed to branch off from the suction pipe 90, A vane chamber communicating pipe 220 provided on the valve chamber 210 and communicating with the vane chambers 70 and 80 and a valve chamber 210 provided to move back and forth on the valve chamber 210 to selectively open and close the vane chamber communicating pipe 220 Member (240).

One side of the valve chamber 210 is opened and the other side thereof is closed. One side of the valve chamber 210 communicates with the inside of the casing 10 to be in contact with the compressed gas in the casing 10, So that the refrigerant gas flowing into the cylinder 32 can be partially introduced through the suction pipe branch passage 212.

The vane chamber communicating tube 220 is provided on the valve chamber 210 so that the valve chamber 210 and the first vane chamber 70 can communicate with each other. The valve chamber 210 can be communicated with the closed chamber 73 provided at the rear end side with respect to the front end of the first vane 71 in contact with the first rolling piston 60. [

The blocking member 240 has a structure in which the blocking member 240 moves forward and backward in the valve chamber 210 and a portion of the blocking member 240 is formed in the same manner as the end surface of the valve chamber 210 to selectively connect the vane chamber communication pipe 220, As shown in Fig.

The blocking member 240 is connected to the vane chamber communication pipe opening and closing member 246 for opening and closing the vane chamber communication opening 221 of the vane chamber communication pipe 220, A blocking member 242, and a second blocking member 244 that is affected by the pressure of the discharge side refrigerant gas.

The cross section of the vane chamber communicating tube opening / closing member 246, the first blocking member 242 and the second blocking member 244 is formed to be the same as that of the valve chamber 210, 1 through the side surfaces of the first blocking member 242 and the second blocking member 244.

The vane chamber communicating tube opening and closing member 246 is disposed between the first blocking member 242 and the second blocking member 244 and extends in the lateral direction as the valve chamber 210 moves forward and backward. The chamber communication port 221 can be opened and closed.

The first blocking member 242 is disposed to be spaced from the other closed side of the valve chamber 210 and is supported by a valve spring 260 provided on the other closed side of the valve chamber 210, And the pressure of the suction side refrigerant gas flowing through the suction pipe diverging flow path 212 are affected. A first blocking member communication passage 243 is provided in the hollow portion of the first blocking member 242 to guide the suction side refrigerant gas flowing through the suction pipe branch passage 212.

The second blocking member 244 is disposed on the opened side of the valve chamber 210 so that the compressed refrigerant gas A discharged into the casing 10 has an influence on the end of the second blocking member 244 . A second blocking member communication passage 245 is provided in the hollow portion of the second blocking member 244 to guide the compressed refrigerant gas A introduced through the open side of the valve chamber 210.

The compressed refrigerant gas A discharged from the cylinders 32 and 34 is disposed on one side of the vane chamber communication pipe opening and closing member 246 through the blocking member communication flow paths 243 and 245 and the suction pipe branch flow path 212 is disposed on the other side. The suction refrigerant gas flowing through the suction passage is disposed.

The first blocking member 242 and the vane chamber communicating portion opening / closing member and the second blocking member 244 may be connected to the blocking member connection portion 248.

The blocking member connection portion 248 has a smaller diameter than the first blocking member 242 and the second blocking member 244 and the refrigerant gas flowing through the blocking member communication flow paths 243, A refrigerant gas guide hole 250 is provided on a side surface thereof. A communication passage 252 may be formed which extends from the first blocking member communication passage 243 and the second blocking member communication passage 245. [

The operation of the rotary compressor according to the above configuration will be described below.

A case where the compression capacity of the compressor becomes higher according to the change of the operating condition of the air conditioner, that is, the case where the discharge pressure rises and the suction pressure falls is explained.

The discharge refrigerant gas pressure received by the other side of the second blocking member 244 disposed on one side of the valve chamber 210 and the vane chamber communication pipe opening and closing member 246 is lower than the pressure of the first blocking member 242 and the vane chamber communication pipe opening / The blocking member 240 is positioned inside the valve chamber 210, that is, the closed chamber of the valve chamber 210, The blocking member 240 is moved to the side opposite to the side surface.

In this case, since the vane chamber communicating tube opening / closing member 246 moves toward the inside of the valve chamber 210 around the vane chamber communicating tube 220, the outlet side refrigerant gas flowing through the second blocking member communicating passage 245 is vane And communicates with the chamber communicating tube 220.

Through this operation, the discharge side refrigerant gas flows into the closed chamber 73 of the first vane chamber 70 through the vane chamber communicating pipe 220, and then the first vane 71 is pushed toward the first rolling piston 60 do.

Next, a case where the compressing ability of the compressor is lowered according to the change of the operating condition of the air conditioner, that is, the case where the discharge pressure falls and the suction pressure rises will be described.

The discharge refrigerant gas pressure received by the other side of the second blocking member 244 disposed on one side of the valve chamber 210 and the vane chamber communication pipe opening and closing member 246 is lower than the pressure of the first blocking member 242 and the vane chamber communication pipe opening / The blocking member 240 is disposed on the outer side of the valve chamber 210, that is, on the open side of the valve chamber 210 The blocking member 240 moves.

In this case, since the vane chamber communicating tube opening / closing member 246 moves to the outside of the valve chamber 210 around the vane chamber communicating tube 220, the suction side refrigerant gas flowing through the first blocking member communicating passage 243 And communicates with the vane chamber communicating tube 220.

The suction side refrigerant gas flows into the closed chamber 73 of the first vane chamber 70 through the vane chamber communicating tube 220 and the first vane 71 is supplied with a low pressure, 71 are pulled toward the sealing chamber 73 of the first vane chamber 70 so as to perform an idle motion in which the first rolling piston 60 does not perform compression even when the first rolling piston 60 rotates.

Therefore, it is not necessary to supply and cut off the additional power supply necessary for operating one or two cylinders 32 and 34 in the rotary compressor having two internal spaces 50 and 52, so that the circuit configuration is simplified do.

The foregoing has shown and described specific embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the technical idea of the present invention described in the following claims .

1: Rotary compressor 2: Accumulator
3: compressor 4: condenser
5: expansion valve 6: evaporator
10: casing 20: electric element
30: compression element 32: first cylinder
34: second cylinder 40: first bearing plate
42: second bearing plate 44: third bearing plate
50: first inner space 52: second inner space
54: suction chamber 55: compression chamber
60: first rolling piston 62: second rolling piston
70: first vane chamber 71: first vane
72: first vane guide part 73: sealing chamber
80: second vane chamber 81: second vane
82: second vane guide part 83: vane spring receiving part
84: Vane spring
90, 92: suction pipe 91, 93:
94, 95: discharge port 96: discharge piping
100: valve assembly 110: valve chamber
112: Suction pipe branch flow path 120: Vane chamber communicating pipe
121: Vane chamber communicating port 122: Suction side connecting pipe
124: Discharge side connector 140: Closure member
142: Discharge side connector pipe shutoff member 144: Suction side connection pipe shutoff member
146: blocking member connection part 150: valve spring
200: valve assembly 210: valve chamber
212: suction pipe branch passage 220: vane chamber communicating pipe
221: Vane chamber communicating port 240:
242: first blocking member 244: second blocking member
246: Vane chamber communicating tube opening / closing member 248:

Claims (11)

A casing forming an appearance;
A rolling piston reciprocating with eccentricity in the inner space; a vane that radially contacts the rolling piston and divides the inner space into a suction chamber and a compression chamber; A plurality of cylinders provided inside the casing, the vanes having a vane chamber that is recessed toward the outside of the inner space;
A plurality of bearing plates for covering upper and lower portions of the plurality of cylinders to form an inner space together;
And at least one of the plurality of bearing plates in the casing is provided for selectively connecting the suction side and the discharge side refrigerant to the vane chamber so that the vane contacts or is spaced from the rolling piston in accordance with the pressure change of the vane chamber A valve assembly,
Wherein the valve assembly comprises:
A valve chamber having one side opened and communicating with the inside of the casing;
A vane chamber communicating tube provided on the valve chamber and communicating with the vane chamber;
A suction side connection pipe through which the suction side refrigerant flows into the valve chamber and a discharge side connection pipe into which the discharge side refrigerant flows;
And a blocking member provided to move back and forth within the valve chamber,
And the suction pipe connecting pipe and the discharge side connecting pipe are communicated with the vane chamber communicating pipe alternatively by the blocking member. The method according to claim 1,
Wherein the valve assembly comprises:
And a valve spring that engages with the blocking member on the other side of the valve chamber that is closed. The method according to claim 1,
Wherein the plurality of cylinders comprise:
A suction pipe for sucking refrigerant into the inner space;
And a discharge pipe for discharging refrigerant compressed into the casing. The method of claim 3,
Wherein the suction pipe connecting pipe and the discharge side connecting pipe are branched from the suction pipe and the inside of the casing, respectively. The method of claim 3,
Wherein one end of the blocking member is moved on the valve chamber under the influence of the pressure of the suction side refrigerant branching from the suction pipe and the other end being influenced by the pressure of the discharge side refrigerant in the casing through one opened side of the valve chamber Rotary compressor. 5. The method of claim 4,
The blocking member
A suction-side connector pipe blocking member for blocking the suction pipe connector;
A discharge side connection pipe shutoff member for shutting off the discharge side connection pipe;
And a blocking member connection part connecting the suction side connection pipe blocking member and the discharge side connection pipe blocking member. The method according to claim 1,
And the valve assembly is provided on a side surface of the bearing plate. A casing forming an appearance;
A rolling piston reciprocating in an eccentric manner in the internal space; a rolling piston radially contacting the rolling piston, the internal space being connected to the suction chamber and the compression chamber, A plurality of cylinders provided inside the casing, the vanes having a vane chamber that is recessed toward the outside of the inner space so that the vane moves forward and backward;
A plurality of bearing plates for covering upper and lower portions of the plurality of cylinders to form an inner space together;
And a plurality of bearing plates provided on at least one side of the plurality of bearing plates in the casing for selectively connecting the suction side and the discharge side refrigerant to the vane chamber so that the vane contacts or is spaced from the rolling piston in accordance with a pressure change of the vane chamber And a connecting valve assembly,
Wherein the valve assembly comprises:
A valve chamber in which one side is open and a discharge side refrigerant communicates with the casing, and the other side is closed and branched from the suction pipe to communicate with a suction side refrigerant;
A vane chamber communicating tube provided on the valve chamber and communicating with the vane chamber;
And a blocking member provided to move back and forth on the valve chamber to selectively open and close the vane chamber communication tube. 9. The method of claim 8,
The blocking member
And a vane chamber communicating tube opening and closing member for opening and closing the vane chamber communicating tube by contacting and retracting according to the pressure of both sides, the one side being in contact with the suction side refrigerant and the other side being in contact with the discharge side refrigerant. 10. The method of claim 9,
Wherein the valve assembly comprises:
Further comprising a valve spring having one end fixed to one side of the vane chamber communication pipe opening / closing member and the other end closed with the other side of the valve chamber. 9. The method of claim 8,
Wherein the cross section perpendicular to the longitudinal direction of the vane chamber communicating tube opening and closing member is the same as the cross section perpendicular to the longitudinal direction of the valve chamber.
KR20130050733A 2013-05-06 2013-05-06 Rotary compressor KR20140131744A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026703A (en) * 2018-09-13 2018-12-18 珠海凌达压缩机有限公司 Variable-capacity pump body assembly and compressor with same
CN109058106A (en) * 2018-09-13 2018-12-21 珠海凌达压缩机有限公司 Pump body assembly, compressor and dual-temperature air conditioning system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026703A (en) * 2018-09-13 2018-12-18 珠海凌达压缩机有限公司 Variable-capacity pump body assembly and compressor with same
CN109058106A (en) * 2018-09-13 2018-12-21 珠海凌达压缩机有限公司 Pump body assembly, compressor and dual-temperature air conditioning system
CN109058106B (en) * 2018-09-13 2023-12-01 珠海凌达压缩机有限公司 Pump body assembly, compressor and dual-temperature air conditioning system
CN109026703B (en) * 2018-09-13 2024-03-22 珠海凌达压缩机有限公司 Variable capacity pump body assembly and compressor with same

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