KR100664294B1 - Modulation apparatus for rotary compressor and airconditioner with this - Google Patents

Abstract

The present invention relates to a variable capacity apparatus of a rotary compressor, and an air conditioner having the same, a casing having a gas suction pipe communicating with an evaporator and a gas discharge pipe communicating with a condenser, and fixedly installed in the casing to provide a predetermined compression space. A cylinder unit which forms a suction port for suctioning the refrigerant into the compression space and a discharge port for discharging the compressed refrigerant, and forms a bypass flow path to bypass a part of the refrigerant compressed between the suction port and the discharge port to the suction port in advance; The compression space of the cylinder is coupled to the rotating shaft of the drive motor by a rolling piston for centrifugally compressing the refrigerant gas while pivoting inside the cylinder, and movably coupled to the cylinder so as to be pressed against the outer circumferential surface of the rolling piston. The vane partitioned into suction chamber and compression chamber, combined with cylinder unit, Including the actuator to change the capacity of the compressor by opening and closing the bypass channel of the cylinder while the power is turned on or off according to the operation mode of the shaft, not only can simplify the piping of the variable capacity compressor, but also apply this compressor to the air conditioner. When the interference with other pipes can be prevented in advance, assembling of the air conditioner can be improved. In addition, the production cost can be reduced by reducing the number of valves.

Description

Capacity variable device of a rotary compressor and an air conditioner using the same {MODULATION APPARATUS FOR ROTARY COMPRESSOR AND AIRCONDITIONER WITH THIS}

1 is a system diagram showing an example of a conventional variable displacement rotary compressor,

2A and 2B are schematic views showing a compression chamber area for normal operation and saving operation of a conventional variable displacement rotary compressor;

3 is a system diagram showing an example of the present invention variable displacement rotary compressor,

Figure 4 is a longitudinal sectional view showing a variable capacity device of the variable displacement rotary compressor of the present invention;

5 is a bottom view of the main bearing in the variable displacement rotary compressor of the present invention;

6A and 6B are longitudinal cross-sectional views showing a variable capacity state during normal operation and saving operation of the variable displacement rotary compressor of the present invention;

7 is a longitudinal sectional view showing an example of the present invention of a variable displacement double type rotary compressor.

** Description of symbols for the main parts of the drawing **

3: condenser 4: evaporator

5: accumulator 11: casing

12: cylinder 12d: bypass hole

12e: valve hole 12f: communication hole

13 main bearing 13b: communication flow path

14: sub-bearing 15: rotating shaft

16: rolling piston 17: vane

20: actuator 21: housing

22: electromagnet 23: bypass valve

24: valve spring P2: gas flow pipe

P4: Gas Suction Pipe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable capacity apparatus of a rotary compressor and an air conditioner employing the same, and more particularly, to a variable capacity apparatus of a rotary compressor and an air conditioner employing the actuator by installing an actuator outside the casing.

In general, a rotary compressor is mainly applied to an air conditioner such as an air conditioner. Recently, as the function of the air conditioner is diversified, the rotary compressor also requires a product that can vary in capacity. As a technique for varying the capacity of a rotary compressor, a so-called inverter method that controls the number of revolutions of the compressor by using an inverter motor is mainly known, but this technique is expensive because the inverter motor itself is expensive, and most of the air conditioners are statistically Considering that it is used as a cooler, there is a limit in that it is difficult to increase the refrigerating capacity under the heating conditions, rather than to increase the refrigeration capacity under the more important cooling conditions in the air conditioner compressor.

Accordingly, in recent years, the so-called "refrigeration capacity change technology" by changing the volume of the compression chamber by bypassing part of the refrigerant gas compressed in the cylinder to the outside of the cylinder (hereinafter referred to as "exchange volume switching"). Abbreviated as technology) is widely known.

1 is a system diagram showing an example of a conventional variable displacement rotary compressor, Figures 2a and 2b is a schematic diagram showing the compression chamber area for the normal operation and the saving operation of the conventional variable displacement rotary compressor.

As shown in the drawing, the conventional variable displacement rotary compressor forms a bypass hole 1a of the cylinder so that a part of the refrigerant compressed in the middle of the compression space of the cylinder 1 can be bypassed according to the operation state of the compressor. The bypass pipe P1 is connected to the bypass hole 1a to the outside of the casing 2, and is piped from the end of the bypass pipe P1, and one end thereof is discharged from the casing 2 and the condenser ( 3) connecting to the discharge side connecting pipe (P3) in the middle of the gas discharge pipe (P2) for connecting while the other end is the suction side connecting pipe in the middle of the gas suction pipe (P4) connecting the evaporator (4) and the accumulator (5) It is connected to (P5). In addition, a discharge side valve V1 and a suction side valve V2 are respectively provided in the middle of the discharge side connecting pipe P3 and the suction side connecting pipe P5, and at the inlet side end of the bypass pipe P1. The bypass valve V3 is provided to open and close the bypass hole 1a of the cylinder 1 in accordance with the opening and closing of the discharge side valve V1 and the suction side valve V2.

In the drawings, reference numeral 6 denotes a rotating shaft, 7 a rolling piston, and 8 a vane.

When the compressor operates normally in the conventional variable displacement rotary compressor as described above, a part of the refrigerant discharged to the gas discharge pipe P2 is discharged as the discharge valve V1 of FIG. 1 is opened and the suction valve V2 is closed. The high pressure refrigerant flows into the bypass pipe P1 along the solid arrow, and the high pressure refrigerant pushes the bypass valve V3 to block the bypass hole 1a of the cylinder 1, as shown in FIG. 2A. All of the refrigerant sucked into the compression space of the compression is repeated a series of processes discharged to the gas discharge pipe (P2) discharged.

On the other hand, when the compressor performs the saving operation, as the discharge valve V1 of FIG. 1 is closed and the suction valve V2 is opened, the pressure back side of the bypass valve V3 becomes the suction pressure environment, as shown in FIG. 2B. The bypass valve V3 is pushed to open the bypass hole 1a, and a part of the refrigerant compressed in the compression space through the open bypass hole 1a is connected to the suction side connection pipe P5 along the dotted arrow of FIG. 1. By bypassing to the accumulator 5 through only a portion of the refrigerant sucked into the compression space of the cylinder 1 was compressed and discharged.

However, in the conventional variable capacity apparatus of the rotary compressor, the bypass pipe P2, the discharge side connecting pipe P3 and the suction side connecting pipe P5 are provided outside the compressor casing 2 to the piping of the air conditioner. As it is connected to the air conditioning pipe as well as difficult to assemble, the discharge side valve (V1) and the suction side valve (V2) has to be installed separately, there is a problem that the number of parts is increased to increase the cost.

The present invention has been made in view of the problems of the conventional variable capacity of the rotary compressor as described above, it is possible to easily and simply configure the variable capacity device of the compressor as well as to reduce the number of parts to reduce the production cost It is an object of the present invention to provide a variable capacity device of a rotary compressor and an air conditioner using the same.

In order to achieve the object of the present invention, a casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; A cylinder which opens both upper and lower sides so as to form a predetermined compression space and is fixedly installed in the casing, and passes through at least one side of at least both sides from the inner circumference of the compression space to form a bypass hole; A cylinder unit made of a bearing plate for forming a communication space so as to cover both sides to form a compression space and contact the bypass hole with the bypass hole and a suction port of the cylinder; A rolling piston coupled to the rotating shaft of the drive motor to make a pivoting movement inside the cylinder; A vane movably coupled to the cylinder in a radial direction so as to be pressed against an outer circumferential surface of the rolling piston; And coupled to the cylinder unit and provides a variable capacity of the rotary compressor including an actuator for varying the capacity of the compressor by opening and closing the bypass flow path of the cylinder while the power is turned on / off according to the operation mode of the compressor.

Moreover, the air conditioner which applied the said rotary compressor is provided.

Hereinafter, a variable capacity device of a rotary compressor according to the present invention and an air conditioner to which the same is applied will be described in detail with reference to an embodiment shown in the accompanying drawings.

Figure 3 is a schematic diagram showing an example of the variable displacement rotary compressor of the present invention, Figure 4 is a longitudinal sectional view showing a variable capacity device of the variable displacement rotary compressor of the present invention, Figure 5 is a bottom view of the main bearing in the variable displacement rotary compressor of the present invention. 6A and 6B are longitudinal cross-sectional views showing a variable capacity state for the normal operation and the saving operation of the variable displacement rotary compressor of the present invention, and FIG. 7 is a longitudinal cross-sectional view showing an example of the variable displacement double rotary compressor of the present invention.

As shown in the drawing, the rotary compressor according to the present invention includes a casing 11 for communicating the gas suction pipe P4 and the gas discharge pipe P2, and an electric mechanism unit provided above the casing 11 to generate rotational force. And a compression mechanism provided at the lower side of the casing 11 to compress the refrigerant with the rotational force generated by the power mechanism, and a compression aperture provided at the compressor mechanism to selectively open and close the bypass hole of the compressor mechanism described later according to the operation mode of the compressor. It consists of the actuator 20.

The electric drive unit rotates while interacting with the stator Ms, which is fixed to the inside of the casing 11 to apply power from the outside to the stator Ms, and has a predetermined gap inside the stator Ms. It consists of electrons (Mr).

Compressor part is formed in an annular shape and the cylinder 12 to be installed in the casing 11 and the main bearing plate (hereinafter, abbreviated as main bearing) covering the upper and lower sides of the cylinder 12 to form an inner space (S) together. 13 and the sub-bearing plate (hereinafter abbreviated as sub-bearing) 14, the rotary shaft is pressed into the rotor (Mr) and supported by the main bearing 13 and the sub-bearing 14 to transmit the rotational force (15) and the rolling piston (16) rotatably coupled to the eccentric portion of the rotating shaft (15) to compress the refrigerant while turning in the inner space (S) of the cylinder (12), and the outer circumferential surface of the rolling piston (16). A vane (not shown) coupled to the cylinder 12 so as to be squeezable in a radial direction to partition the internal space S of the cylinder 12 into a suction chamber and a compression chamber, and provided near the center of the main bearing 13. It is coupled to the tip of one discharge port 13a so as to be openable and discharged from the compression chamber. It comprises a discharge valve 17 for limiting a refrigerant gas.

The cylinder 11 is formed in an annular shape so that the rolling piston 16 can perform a relative movement as shown in FIGS. 3 to 6b, and at one side thereof, the vane slit so that the vane can linearly move in a radial direction. (Not shown) to form a linear, through the inlet port (12b) for communicating with the gas suction pipe (P4) on one side of the vaneslit radially through the discharge port of the main bearing (13) described above on the other side of the vaneslit The discharge guide groove 12c is formed in communication with the 13a to induce the discharge of the refrigerant gas, and the compression space S is formed at one side of the cylinder 12, more precisely, at the discharge guide groove 12c toward the vane. The bypass hole 12d is formed to bypass a portion of the refrigerant sucked into the compressed air, and a bypass valve 23 of the actuator 20 to be described later is formed in the axial direction at the outlet end of the bypass hole 12d. Valve hole 12e is formed to slide do. Here, the bypass hole 12d is preferably formed so that its outlet side is high so as to quickly bypass the compressed refrigerant.

As shown in FIG. 5, the main bearing 13 has an arc-shaped communication flow path for communicating the bypass hole 12d and the suction port 12b through the valve hole 12e to the bottom surface in contact with the upper surface of the cylinder 12. 13b), and the sub-bearing 14 communicates with the valve hole 12e of the cylinder 12 so that the bypass valve 23 of the actuator 20 is slidably coupled in the axial direction. (14a) is formed.

The actuator 20 slides in the housing 21 to be welded to the sub-bearing 14, the electromagnet 22 fixed to the housing 21 in the casing 11, and the inside of the housing 21. Bypass valve 23 for opening and closing the bypass hole 12d while reciprocating in a straight line according to the on / off of the electromagnet 22, the housing 21 and the bypass valve 23. It is composed of a valve spring 24 installed so that both ends are supported therebetween to return the bypass valve 23 to its original position when the electromagnet 22 is turned off.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

In the figure, reference numeral 12f denotes a communication hole and 13b a discharge hole.

The variable capacity device of the rotary compressor of the present invention as described above has the following effects.

That is, when the electric power is applied to the electric drive unit, the rotating shaft 15 rotates, and the rolling piston 16 rotates in the inner space S of the cylinder 12, and a volume is formed between the vanes (not shown). After forming and suctioning and compressing the refrigerant, the refrigerant gas is discharged into the casing (11). The refrigerant gas is blown into the condenser (3) of the refrigeration cycle apparatus by blowing the gas discharge pipe (P2). After going through 4) in turn and repeats a series of processes to be sucked back into the inner space (S) of the cylinder 11 through the gas suction pipe (P4).

Here, when the compressor operates normally or the air conditioner to which the compressor is applied performs power operation, as shown in FIG. 6A, the power is cut off (OFF) as shown in FIG. 6A, and the bypass valve 23 is opened by the valve spring 24. It moves to the upper side of the figure to block the bypass hole 12d. In this way, by compressing the entire refrigerant sucked into the compression space (S) of the cylinder 12, the compressor or the air conditioner applied thereto is 100% operation.

On the other hand, in the case of saving operation such as when the compressor or the air conditioner applied thereto is activated, power is applied to the electromagnet 22 as shown in FIG. 6B so that the bypass valve 23 compresses the valve spring 24. While moving downward in the drawing, the bypass hole 12d is opened. In this way, as the compression chamber of the cylinder 12 and the suction chamber communicate with each other via the communication passage 13b, the entire refrigerant sucked into the suction chamber is not compressed, and a part of the refrigerant is moved to the suction chamber, so that the compressor or the air conditioner applied thereto is about 50%. To drive.

On the other hand, the case where the variable capacity device according to the present invention is applied to a double rotary compressor is as follows.

That is, as shown in FIG. 7, the compression mechanism of the rotary compressor is divided into a first compression mechanism 110 on the upper side and a second compression mechanism 120 on the lower side, and either one of them (in the figure, the second compression mechanism portion) The actuator 20 described above may be installed in both the compression mechanism units.

First, when the actuator 20 is applied only to the second compression mechanism 120, the first compression mechanism 110 always operates normally while the second compression mechanism 120 controls the actuator 20. Capacity of the compressor can be controlled in two stages by 100% operation or 50% operation according to the operation mode of the compressor or the operation mode of the air conditioner.

Next, when the actuator 20 is applied to both the first compression mechanism unit 110 and the second compression mechanism unit 120, the first compression mechanism unit 110 and the second compression mechanism unit 120 according to the operation mode of the compressor. It can be controlled in three stages of the compressor by operating all the normal operation or saving one or saving all operation. In particular, when the actuator is applied to both of the compression mechanism parts 110 and 120, the cylinder capacity of both compression mechanism parts may be differently produced. In this case, the compressor and the air conditioner using the same may be operated in four stages. For example, when the capacity of the first compression mechanism (110) is 60% and the capacity of the second compression mechanism (120) is 40%, when both the first compression mechanism (110) and the second compression mechanism (120) operate normally. Compressor and air conditioner applied 100% of this work, but 80% when only the first compressor section 110 operates normally, 70% when the second compressor section 120 operates normally, saving both compressor sections When driving, 50% of the work is done, so more various driving modes can be realized according to the surrounding environment.

A variable capacity device of a rotary compressor and an air conditioner having the same according to the present invention form a bypass hole in one side of a cylinder, and form a communication flow path for communicating the bypass hole to a suction port in a main bearing, and selectively selecting a bypass hole. By installing and configuring an actuator that can be opened and closed, not only can the piping of the variable capacity compressor be simplified, but also the air conditioner assembly can be improved by preventing interference with other piping when the compressor is applied to the air conditioner. . In addition, the production cost can be reduced by reducing the number of valves.

Claims (12)

A casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; A cylinder which opens both upper and lower sides so as to form a predetermined compression space and is fixedly installed in the casing, and passes through at least one side of at least both sides from the inner circumference of the compression space to form a bypass hole; A cylinder unit made of a bearing plate for forming a communication space so as to cover both sides to form a compression space and contact the bypass hole with the bypass hole and a suction port of the cylinder; A rolling piston coupled to the rotating shaft of the drive motor to make a pivoting movement inside the cylinder; A vane movably coupled to the cylinder in a radial direction so as to be pressed against an outer circumferential surface of the rolling piston; And A variable capacity device of a rotary compressor including an actuator coupled to the cylinder unit and the actuator to change the capacity of the compressor by opening and closing the bypass passage of the cylinder while the power is on / off according to the operation mode of the compressor. delete The method of claim 1, And the bypass hole is formed such that the outlet side is inclined high. The method of claim 1, And said actuator comprises an electromagnet to which power is applied, and a bypass valve for opening and closing the bypass passage while moving forward or backward depending on whether power is applied to the electromagnet. The method of claim 1, A variable capacity device of a rotary compressor, characterized in that the number of cylinder units. The method of claim 1, The cylinder unit has a plurality of variable capacity of the rotary compressor, characterized in that by installing one actuator by forming a bypass flow path in any one of the cylinder unit. The method of claim 1, And a plurality of cylinder units, and a plurality of actuators are provided to form bypass passages in each cylinder unit to independently open and close the plurality of bypass passages. The method according to claim 6 or 7, The plurality of cylinders are variable capacity apparatus of a rotary compressor, characterized in that the capacity of the compression space is the same. The method according to claim 6 or 7, The plurality of cylinders variable capacity of the rotary compressor, characterized in that the capacity of the compression space is different. The method of claim 1, The drive motor is a variable capacity apparatus of the rotary compressor, characterized in that the constant speed motor. The method of claim 1, The drive motor is a variable capacity device of the rotary compressor, characterized in that the inverter motor. Air conditioner to which the variable capacity device of the rotary compressor of claim 1 is applied.

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